gl_context_loader/
lib.rs

1// Copyright 2014 The Servo Project Developers. See the COPYRIGHT
2// file at the top-level directory of this distribution.
3//
4// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7// option. This file may not be copied, modified, or distributed
8// except according to those terms.
9
10#![cfg_attr(not(feature = "std"), no_std)]
11#![allow(non_snake_case)]
12
13#[cfg(feature = "std")]
14extern crate core;
15#[macro_use]
16extern crate alloc;
17
18use core::{ptr, mem};
19
20#[cfg(not(feature = "std"))]
21use alloc::string::String;
22#[cfg(not(feature = "std"))]
23use alloc::string::ToString;
24#[cfg(not(feature = "std"))]
25use alloc::vec::Vec;
26
27#[cfg(feature = "gleam_trait")]
28extern crate gleam;
29
30#[allow(non_camel_case_types, dead_code)]
31pub mod ctypes {
32    pub enum c_void {}
33    pub type c_char = i8;
34    pub type c_schar = i8;
35    pub type c_uchar = u8;
36    pub type c_short = i16;
37    pub type c_ushort = u16;
38    pub type c_int = i32;
39    pub type c_uint = u32;
40    pub type c_long = i64;
41    pub type c_ulong = u64;
42    pub type c_longlong = i64;
43    pub type c_ulonglong = u64;
44    pub type c_float = f32;
45    pub type c_double = f64;
46    pub type __int8 = i8;
47    pub type __uint8 = u8;
48    pub type __int16 = i16;
49    pub type __uint16 = u16;
50    pub type __int32 = i32;
51    pub type __uint32 = u32;
52    pub type __int64 = i64;
53    pub type __uint64 = u64;
54    pub type wchar_t = u16;
55}
56
57#[allow(non_camel_case_types, non_upper_case_globals)]
58pub mod gl {
59    use super::GLenum;
60
61    pub const ACCUM: GLenum = 0x0100;
62    pub const MAP_PERSISTENT_BIT: GLenum = 64;
63    pub const ACCUM_ALPHA_BITS: GLenum = 0x0D5B;
64    pub const ACCUM_BLUE_BITS: GLenum = 0x0D5A;
65    pub const ACCUM_BUFFER_BIT: GLenum = 0x00000200;
66    pub const ACCUM_CLEAR_VALUE: GLenum = 0x0B80;
67    pub const ACCUM_GREEN_BITS: GLenum = 0x0D59;
68    pub const ACCUM_RED_BITS: GLenum = 0x0D58;
69    pub const ACTIVE_ATTRIBUTES: GLenum = 0x8B89;
70    pub const ACTIVE_ATTRIBUTE_MAX_LENGTH: GLenum = 0x8B8A;
71    pub const ACTIVE_TEXTURE: GLenum = 0x84E0;
72    pub const ACTIVE_UNIFORMS: GLenum = 0x8B86;
73    pub const ACTIVE_UNIFORM_BLOCKS: GLenum = 0x8A36;
74    pub const ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH: GLenum = 0x8A35;
75    pub const ACTIVE_UNIFORM_MAX_LENGTH: GLenum = 0x8B87;
76    pub const ADD: GLenum = 0x0104;
77    pub const ADD_SIGNED: GLenum = 0x8574;
78    pub const ALIASED_LINE_WIDTH_RANGE: GLenum = 0x846E;
79    pub const ALIASED_POINT_SIZE_RANGE: GLenum = 0x846D;
80    pub const ALL_ATTRIB_BITS: GLenum = 0xFFFFFFFF;
81    pub const ALPHA: GLenum = 0x1906;
82    pub const ALPHA12: GLenum = 0x803D;
83    pub const ALPHA16: GLenum = 0x803E;
84    pub const ALPHA16F_EXT: GLenum = 0x881C;
85    pub const ALPHA32F_EXT: GLenum = 0x8816;
86    pub const ALPHA4: GLenum = 0x803B;
87    pub const ALPHA8: GLenum = 0x803C;
88    pub const ALPHA8_EXT: GLenum = 0x803C;
89    pub const ALPHA_BIAS: GLenum = 0x0D1D;
90    pub const ALPHA_BITS: GLenum = 0x0D55;
91    pub const ALPHA_INTEGER: GLenum = 0x8D97;
92    pub const ALPHA_SCALE: GLenum = 0x0D1C;
93    pub const ALPHA_TEST: GLenum = 0x0BC0;
94    pub const ALPHA_TEST_FUNC: GLenum = 0x0BC1;
95    pub const ALPHA_TEST_REF: GLenum = 0x0BC2;
96    pub const ALREADY_SIGNALED: GLenum = 0x911A;
97    pub const ALWAYS: GLenum = 0x0207;
98    pub const AMBIENT: GLenum = 0x1200;
99    pub const AMBIENT_AND_DIFFUSE: GLenum = 0x1602;
100    pub const AND: GLenum = 0x1501;
101    pub const AND_INVERTED: GLenum = 0x1504;
102    pub const AND_REVERSE: GLenum = 0x1502;
103    pub const ANY_SAMPLES_PASSED: GLenum = 0x8C2F;
104    pub const ANY_SAMPLES_PASSED_CONSERVATIVE: GLenum = 0x8D6A;
105    pub const ARRAY_BUFFER: GLenum = 0x8892;
106    pub const ARRAY_BUFFER_BINDING: GLenum = 0x8894;
107    pub const ATTACHED_SHADERS: GLenum = 0x8B85;
108    pub const ATTRIB_STACK_DEPTH: GLenum = 0x0BB0;
109    pub const AUTO_NORMAL: GLenum = 0x0D80;
110    pub const AUX0: GLenum = 0x0409;
111    pub const AUX1: GLenum = 0x040A;
112    pub const AUX2: GLenum = 0x040B;
113    pub const AUX3: GLenum = 0x040C;
114    pub const AUX_BUFFERS: GLenum = 0x0C00;
115    pub const BACK: GLenum = 0x0405;
116    pub const BACK_LEFT: GLenum = 0x0402;
117    pub const BACK_RIGHT: GLenum = 0x0403;
118    pub const BGR: GLenum = 0x80E0;
119    pub const BGRA: GLenum = 0x80E1;
120    pub const BGRA8_EXT: GLenum = 0x93A1;
121    pub const BGRA_EXT: GLenum = 0x80E1;
122    pub const BGRA_INTEGER: GLenum = 0x8D9B;
123    pub const BGR_INTEGER: GLenum = 0x8D9A;
124    pub const BITMAP: GLenum = 0x1A00;
125    pub const BITMAP_TOKEN: GLenum = 0x0704;
126    pub const BLEND: GLenum = 0x0BE2;
127    pub const BLEND_ADVANCED_COHERENT_KHR: GLenum = 0x9285;
128    pub const BLEND_COLOR: GLenum = 0x8005;
129    pub const BLEND_DST: GLenum = 0x0BE0;
130    pub const BLEND_DST_ALPHA: GLenum = 0x80CA;
131    pub const BLEND_DST_RGB: GLenum = 0x80C8;
132    pub const BLEND_EQUATION: GLenum = 0x8009;
133    pub const BLEND_EQUATION_ALPHA: GLenum = 0x883D;
134    pub const BLEND_EQUATION_RGB: GLenum = 0x8009;
135    pub const BLEND_SRC: GLenum = 0x0BE1;
136    pub const BLEND_SRC_ALPHA: GLenum = 0x80CB;
137    pub const BLEND_SRC_RGB: GLenum = 0x80C9;
138    pub const BLUE: GLenum = 0x1905;
139    pub const BLUE_BIAS: GLenum = 0x0D1B;
140    pub const BLUE_BITS: GLenum = 0x0D54;
141    pub const BLUE_INTEGER: GLenum = 0x8D96;
142    pub const BLUE_SCALE: GLenum = 0x0D1A;
143    pub const BOOL: GLenum = 0x8B56;
144    pub const BOOL_VEC2: GLenum = 0x8B57;
145    pub const BOOL_VEC3: GLenum = 0x8B58;
146    pub const BOOL_VEC4: GLenum = 0x8B59;
147    pub const BUFFER: GLenum = 0x82E0;
148    pub const BUFFER_ACCESS: GLenum = 0x88BB;
149    pub const BUFFER_ACCESS_FLAGS: GLenum = 0x911F;
150    pub const BUFFER_KHR: GLenum = 0x82E0;
151    pub const BUFFER_MAPPED: GLenum = 0x88BC;
152    pub const BUFFER_MAP_LENGTH: GLenum = 0x9120;
153    pub const BUFFER_MAP_OFFSET: GLenum = 0x9121;
154    pub const BUFFER_MAP_POINTER: GLenum = 0x88BD;
155    pub const BUFFER_SIZE: GLenum = 0x8764;
156    pub const BUFFER_USAGE: GLenum = 0x8765;
157    pub const BYTE: GLenum = 0x1400;
158    pub const C3F_V3F: GLenum = 0x2A24;
159    pub const C4F_N3F_V3F: GLenum = 0x2A26;
160    pub const C4UB_V2F: GLenum = 0x2A22;
161    pub const C4UB_V3F: GLenum = 0x2A23;
162    pub const CCW: GLenum = 0x0901;
163    pub const CLAMP: GLenum = 0x2900;
164    pub const CLAMP_FRAGMENT_COLOR: GLenum = 0x891B;
165    pub const CLAMP_READ_COLOR: GLenum = 0x891C;
166    pub const CLAMP_TO_BORDER: GLenum = 0x812D;
167    pub const CLAMP_TO_EDGE: GLenum = 0x812F;
168    pub const CLAMP_VERTEX_COLOR: GLenum = 0x891A;
169    pub const CLEAR: GLenum = 0x1500;
170    pub const CLIENT_ACTIVE_TEXTURE: GLenum = 0x84E1;
171    pub const CLIENT_ALL_ATTRIB_BITS: GLenum = 0xFFFFFFFF;
172    pub const CLIENT_ATTRIB_STACK_DEPTH: GLenum = 0x0BB1;
173    pub const CLIENT_PIXEL_STORE_BIT: GLenum = 0x00000001;
174    pub const CLIENT_VERTEX_ARRAY_BIT: GLenum = 0x00000002;
175    pub const CLIP_DISTANCE0: GLenum = 0x3000;
176    pub const CLIP_DISTANCE1: GLenum = 0x3001;
177    pub const CLIP_DISTANCE2: GLenum = 0x3002;
178    pub const CLIP_DISTANCE3: GLenum = 0x3003;
179    pub const CLIP_DISTANCE4: GLenum = 0x3004;
180    pub const CLIP_DISTANCE5: GLenum = 0x3005;
181    pub const CLIP_DISTANCE6: GLenum = 0x3006;
182    pub const CLIP_DISTANCE7: GLenum = 0x3007;
183    pub const CLIP_PLANE0: GLenum = 0x3000;
184    pub const CLIP_PLANE1: GLenum = 0x3001;
185    pub const CLIP_PLANE2: GLenum = 0x3002;
186    pub const CLIP_PLANE3: GLenum = 0x3003;
187    pub const CLIP_PLANE4: GLenum = 0x3004;
188    pub const CLIP_PLANE5: GLenum = 0x3005;
189    pub const COEFF: GLenum = 0x0A00;
190    pub const COLOR: GLenum = 0x1800;
191    pub const COLORBURN_KHR: GLenum = 0x929A;
192    pub const COLORDODGE_KHR: GLenum = 0x9299;
193    pub const COLOR_ARRAY: GLenum = 0x8076;
194    pub const COLOR_ARRAY_BUFFER_BINDING: GLenum = 0x8898;
195    pub const COLOR_ARRAY_POINTER: GLenum = 0x8090;
196    pub const COLOR_ARRAY_SIZE: GLenum = 0x8081;
197    pub const COLOR_ARRAY_STRIDE: GLenum = 0x8083;
198    pub const COLOR_ARRAY_TYPE: GLenum = 0x8082;
199    pub const COLOR_ATTACHMENT0: GLenum = 0x8CE0;
200    pub const COLOR_ATTACHMENT1: GLenum = 0x8CE1;
201    pub const COLOR_ATTACHMENT10: GLenum = 0x8CEA;
202    pub const COLOR_ATTACHMENT11: GLenum = 0x8CEB;
203    pub const COLOR_ATTACHMENT12: GLenum = 0x8CEC;
204    pub const COLOR_ATTACHMENT13: GLenum = 0x8CED;
205    pub const COLOR_ATTACHMENT14: GLenum = 0x8CEE;
206    pub const COLOR_ATTACHMENT15: GLenum = 0x8CEF;
207    pub const COLOR_ATTACHMENT16: GLenum = 0x8CF0;
208    pub const COLOR_ATTACHMENT17: GLenum = 0x8CF1;
209    pub const COLOR_ATTACHMENT18: GLenum = 0x8CF2;
210    pub const COLOR_ATTACHMENT19: GLenum = 0x8CF3;
211    pub const COLOR_ATTACHMENT2: GLenum = 0x8CE2;
212    pub const COLOR_ATTACHMENT20: GLenum = 0x8CF4;
213    pub const COLOR_ATTACHMENT21: GLenum = 0x8CF5;
214    pub const COLOR_ATTACHMENT22: GLenum = 0x8CF6;
215    pub const COLOR_ATTACHMENT23: GLenum = 0x8CF7;
216    pub const COLOR_ATTACHMENT24: GLenum = 0x8CF8;
217    pub const COLOR_ATTACHMENT25: GLenum = 0x8CF9;
218    pub const COLOR_ATTACHMENT26: GLenum = 0x8CFA;
219    pub const COLOR_ATTACHMENT27: GLenum = 0x8CFB;
220    pub const COLOR_ATTACHMENT28: GLenum = 0x8CFC;
221    pub const COLOR_ATTACHMENT29: GLenum = 0x8CFD;
222    pub const COLOR_ATTACHMENT3: GLenum = 0x8CE3;
223    pub const COLOR_ATTACHMENT30: GLenum = 0x8CFE;
224    pub const COLOR_ATTACHMENT31: GLenum = 0x8CFF;
225    pub const COLOR_ATTACHMENT4: GLenum = 0x8CE4;
226    pub const COLOR_ATTACHMENT5: GLenum = 0x8CE5;
227    pub const COLOR_ATTACHMENT6: GLenum = 0x8CE6;
228    pub const COLOR_ATTACHMENT7: GLenum = 0x8CE7;
229    pub const COLOR_ATTACHMENT8: GLenum = 0x8CE8;
230    pub const COLOR_ATTACHMENT9: GLenum = 0x8CE9;
231    pub const COLOR_BUFFER_BIT: GLenum = 0x00004000;
232    pub const COLOR_CLEAR_VALUE: GLenum = 0x0C22;
233    pub const COLOR_INDEX: GLenum = 0x1900;
234    pub const COLOR_INDEXES: GLenum = 0x1603;
235    pub const COLOR_LOGIC_OP: GLenum = 0x0BF2;
236    pub const COLOR_MATERIAL: GLenum = 0x0B57;
237    pub const COLOR_MATERIAL_FACE: GLenum = 0x0B55;
238    pub const COLOR_MATERIAL_PARAMETER: GLenum = 0x0B56;
239    pub const COLOR_SUM: GLenum = 0x8458;
240    pub const COLOR_WRITEMASK: GLenum = 0x0C23;
241    pub const COMBINE: GLenum = 0x8570;
242    pub const COMBINE_ALPHA: GLenum = 0x8572;
243    pub const COMBINE_RGB: GLenum = 0x8571;
244    pub const COMPARE_REF_TO_TEXTURE: GLenum = 0x884E;
245    pub const COMPARE_R_TO_TEXTURE: GLenum = 0x884E;
246    pub const COMPILE: GLenum = 0x1300;
247    pub const COMPILE_AND_EXECUTE: GLenum = 0x1301;
248    pub const COMPILE_STATUS: GLenum = 0x8B81;
249    pub const COMPRESSED_ALPHA: GLenum = 0x84E9;
250    pub const COMPRESSED_INTENSITY: GLenum = 0x84EC;
251    pub const COMPRESSED_LUMINANCE: GLenum = 0x84EA;
252    pub const COMPRESSED_LUMINANCE_ALPHA: GLenum = 0x84EB;
253    pub const COMPRESSED_R11_EAC: GLenum = 0x9270;
254    pub const COMPRESSED_RED: GLenum = 0x8225;
255    pub const COMPRESSED_RED_RGTC1: GLenum = 0x8DBB;
256    pub const COMPRESSED_RG: GLenum = 0x8226;
257    pub const COMPRESSED_RG11_EAC: GLenum = 0x9272;
258    pub const COMPRESSED_RGB: GLenum = 0x84ED;
259    pub const COMPRESSED_RGB8_ETC2: GLenum = 0x9274;
260    pub const COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2: GLenum = 0x9276;
261    pub const COMPRESSED_RGBA: GLenum = 0x84EE;
262    pub const COMPRESSED_RGBA8_ETC2_EAC: GLenum = 0x9278;
263    pub const COMPRESSED_RG_RGTC2: GLenum = 0x8DBD;
264    pub const COMPRESSED_SIGNED_R11_EAC: GLenum = 0x9271;
265    pub const COMPRESSED_SIGNED_RED_RGTC1: GLenum = 0x8DBC;
266    pub const COMPRESSED_SIGNED_RG11_EAC: GLenum = 0x9273;
267    pub const COMPRESSED_SIGNED_RG_RGTC2: GLenum = 0x8DBE;
268    pub const COMPRESSED_SLUMINANCE: GLenum = 0x8C4A;
269    pub const COMPRESSED_SLUMINANCE_ALPHA: GLenum = 0x8C4B;
270    pub const COMPRESSED_SRGB: GLenum = 0x8C48;
271    pub const COMPRESSED_SRGB8_ALPHA8_ETC2_EAC: GLenum = 0x9279;
272    pub const COMPRESSED_SRGB8_ETC2: GLenum = 0x9275;
273    pub const COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2: GLenum = 0x9277;
274    pub const COMPRESSED_SRGB_ALPHA: GLenum = 0x8C49;
275    pub const COMPRESSED_TEXTURE_FORMATS: GLenum = 0x86A3;
276    pub const CONDITION_SATISFIED: GLenum = 0x911C;
277    pub const CONSTANT: GLenum = 0x8576;
278    pub const CONSTANT_ALPHA: GLenum = 0x8003;
279    pub const CONSTANT_ATTENUATION: GLenum = 0x1207;
280    pub const CONSTANT_COLOR: GLenum = 0x8001;
281    pub const CONTEXT_COMPATIBILITY_PROFILE_BIT: GLenum = 0x00000002;
282    pub const CONTEXT_CORE_PROFILE_BIT: GLenum = 0x00000001;
283    pub const CONTEXT_FLAGS: GLenum = 0x821E;
284    pub const CONTEXT_FLAG_DEBUG_BIT: GLenum = 0x00000002;
285    pub const CONTEXT_FLAG_DEBUG_BIT_KHR: GLenum = 0x00000002;
286    pub const CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT: GLenum = 0x00000001;
287    pub const CONTEXT_PROFILE_MASK: GLenum = 0x9126;
288    pub const COORD_REPLACE: GLenum = 0x8862;
289    pub const COPY: GLenum = 0x1503;
290    pub const COPY_INVERTED: GLenum = 0x150C;
291    pub const COPY_PIXEL_TOKEN: GLenum = 0x0706;
292    pub const COPY_READ_BUFFER: GLenum = 0x8F36;
293    pub const COPY_READ_BUFFER_BINDING: GLenum = 0x8F36;
294    pub const COPY_WRITE_BUFFER: GLenum = 0x8F37;
295    pub const COPY_WRITE_BUFFER_BINDING: GLenum = 0x8F37;
296    pub const CULL_FACE: GLenum = 0x0B44;
297    pub const CULL_FACE_MODE: GLenum = 0x0B45;
298    pub const CURRENT_BIT: GLenum = 0x00000001;
299    pub const CURRENT_COLOR: GLenum = 0x0B00;
300    pub const CURRENT_FOG_COORD: GLenum = 0x8453;
301    pub const CURRENT_FOG_COORDINATE: GLenum = 0x8453;
302    pub const CURRENT_INDEX: GLenum = 0x0B01;
303    pub const CURRENT_NORMAL: GLenum = 0x0B02;
304    pub const CURRENT_PROGRAM: GLenum = 0x8B8D;
305    pub const CURRENT_QUERY: GLenum = 0x8865;
306    pub const CURRENT_QUERY_EXT: GLenum = 0x8865;
307    pub const CURRENT_RASTER_COLOR: GLenum = 0x0B04;
308    pub const CURRENT_RASTER_DISTANCE: GLenum = 0x0B09;
309    pub const CURRENT_RASTER_INDEX: GLenum = 0x0B05;
310    pub const CURRENT_RASTER_POSITION: GLenum = 0x0B07;
311    pub const CURRENT_RASTER_POSITION_VALID: GLenum = 0x0B08;
312    pub const CURRENT_RASTER_SECONDARY_COLOR: GLenum = 0x845F;
313    pub const CURRENT_RASTER_TEXTURE_COORDS: GLenum = 0x0B06;
314    pub const CURRENT_SECONDARY_COLOR: GLenum = 0x8459;
315    pub const CURRENT_TEXTURE_COORDS: GLenum = 0x0B03;
316    pub const CURRENT_VERTEX_ATTRIB: GLenum = 0x8626;
317    pub const CW: GLenum = 0x0900;
318    pub const DARKEN_KHR: GLenum = 0x9297;
319    pub const DEBUG_CALLBACK_FUNCTION: GLenum = 0x8244;
320    pub const DEBUG_CALLBACK_FUNCTION_KHR: GLenum = 0x8244;
321    pub const DEBUG_CALLBACK_USER_PARAM: GLenum = 0x8245;
322    pub const DEBUG_CALLBACK_USER_PARAM_KHR: GLenum = 0x8245;
323    pub const DEBUG_GROUP_STACK_DEPTH: GLenum = 0x826D;
324    pub const DEBUG_GROUP_STACK_DEPTH_KHR: GLenum = 0x826D;
325    pub const DEBUG_LOGGED_MESSAGES: GLenum = 0x9145;
326    pub const DEBUG_LOGGED_MESSAGES_KHR: GLenum = 0x9145;
327    pub const DEBUG_NEXT_LOGGED_MESSAGE_LENGTH: GLenum = 0x8243;
328    pub const DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_KHR: GLenum = 0x8243;
329    pub const DEBUG_OUTPUT: GLenum = 0x92E0;
330    pub const DEBUG_OUTPUT_KHR: GLenum = 0x92E0;
331    pub const DEBUG_OUTPUT_SYNCHRONOUS: GLenum = 0x8242;
332    pub const DEBUG_OUTPUT_SYNCHRONOUS_KHR: GLenum = 0x8242;
333    pub const DEBUG_SEVERITY_HIGH: GLenum = 0x9146;
334    pub const DEBUG_SEVERITY_HIGH_KHR: GLenum = 0x9146;
335    pub const DEBUG_SEVERITY_LOW: GLenum = 0x9148;
336    pub const DEBUG_SEVERITY_LOW_KHR: GLenum = 0x9148;
337    pub const DEBUG_SEVERITY_MEDIUM: GLenum = 0x9147;
338    pub const DEBUG_SEVERITY_MEDIUM_KHR: GLenum = 0x9147;
339    pub const DEBUG_SEVERITY_NOTIFICATION: GLenum = 0x826B;
340    pub const DEBUG_SEVERITY_NOTIFICATION_KHR: GLenum = 0x826B;
341    pub const DEBUG_SOURCE_API: GLenum = 0x8246;
342    pub const DEBUG_SOURCE_API_KHR: GLenum = 0x8246;
343    pub const DEBUG_SOURCE_APPLICATION: GLenum = 0x824A;
344    pub const DEBUG_SOURCE_APPLICATION_KHR: GLenum = 0x824A;
345    pub const DEBUG_SOURCE_OTHER: GLenum = 0x824B;
346    pub const DEBUG_SOURCE_OTHER_KHR: GLenum = 0x824B;
347    pub const DEBUG_SOURCE_SHADER_COMPILER: GLenum = 0x8248;
348    pub const DEBUG_SOURCE_SHADER_COMPILER_KHR: GLenum = 0x8248;
349    pub const DEBUG_SOURCE_THIRD_PARTY: GLenum = 0x8249;
350    pub const DEBUG_SOURCE_THIRD_PARTY_KHR: GLenum = 0x8249;
351    pub const DEBUG_SOURCE_WINDOW_SYSTEM: GLenum = 0x8247;
352    pub const DEBUG_SOURCE_WINDOW_SYSTEM_KHR: GLenum = 0x8247;
353    pub const DEBUG_TYPE_DEPRECATED_BEHAVIOR: GLenum = 0x824D;
354    pub const DEBUG_TYPE_DEPRECATED_BEHAVIOR_KHR: GLenum = 0x824D;
355    pub const DEBUG_TYPE_ERROR: GLenum = 0x824C;
356    pub const DEBUG_TYPE_ERROR_KHR: GLenum = 0x824C;
357    pub const DEBUG_TYPE_MARKER: GLenum = 0x8268;
358    pub const DEBUG_TYPE_MARKER_KHR: GLenum = 0x8268;
359    pub const DEBUG_TYPE_OTHER: GLenum = 0x8251;
360    pub const DEBUG_TYPE_OTHER_KHR: GLenum = 0x8251;
361    pub const DEBUG_TYPE_PERFORMANCE: GLenum = 0x8250;
362    pub const DEBUG_TYPE_PERFORMANCE_KHR: GLenum = 0x8250;
363    pub const DEBUG_TYPE_POP_GROUP: GLenum = 0x826A;
364    pub const DEBUG_TYPE_POP_GROUP_KHR: GLenum = 0x826A;
365    pub const DEBUG_TYPE_PORTABILITY: GLenum = 0x824F;
366    pub const DEBUG_TYPE_PORTABILITY_KHR: GLenum = 0x824F;
367    pub const DEBUG_TYPE_PUSH_GROUP: GLenum = 0x8269;
368    pub const DEBUG_TYPE_PUSH_GROUP_KHR: GLenum = 0x8269;
369    pub const DEBUG_TYPE_UNDEFINED_BEHAVIOR: GLenum = 0x824E;
370    pub const DEBUG_TYPE_UNDEFINED_BEHAVIOR_KHR: GLenum = 0x824E;
371    pub const DECAL: GLenum = 0x2101;
372    pub const DECR: GLenum = 0x1E03;
373    pub const DECR_WRAP: GLenum = 0x8508;
374    pub const DELETE_STATUS: GLenum = 0x8B80;
375    pub const DEPTH: GLenum = 0x1801;
376    pub const DEPTH24_STENCIL8: GLenum = 0x88F0;
377    pub const DEPTH32F_STENCIL8: GLenum = 0x8CAD;
378    pub const DEPTH_ATTACHMENT: GLenum = 0x8D00;
379    pub const DEPTH_BIAS: GLenum = 0x0D1F;
380    pub const DEPTH_BITS: GLenum = 0x0D56;
381    pub const DEPTH_BUFFER_BIT: GLenum = 0x00000100;
382    pub const DEPTH_CLAMP: GLenum = 0x864F;
383    pub const DEPTH_CLEAR_VALUE: GLenum = 0x0B73;
384    pub const DEPTH_COMPONENT: GLenum = 0x1902;
385    pub const DEPTH_COMPONENT16: GLenum = 0x81A5;
386    pub const DEPTH_COMPONENT24: GLenum = 0x81A6;
387    pub const DEPTH_COMPONENT32: GLenum = 0x81A7;
388    pub const DEPTH_COMPONENT32F: GLenum = 0x8CAC;
389    pub const DEPTH_FUNC: GLenum = 0x0B74;
390    pub const DEPTH_RANGE: GLenum = 0x0B70;
391    pub const DEPTH_SCALE: GLenum = 0x0D1E;
392    pub const DEPTH_STENCIL: GLenum = 0x84F9;
393    pub const DEPTH_STENCIL_ATTACHMENT: GLenum = 0x821A;
394    pub const DEPTH_TEST: GLenum = 0x0B71;
395    pub const DEPTH_TEXTURE_MODE: GLenum = 0x884B;
396    pub const DEPTH_WRITEMASK: GLenum = 0x0B72;
397    pub const DIFFERENCE_KHR: GLenum = 0x929E;
398    pub const DIFFUSE: GLenum = 0x1201;
399    pub const DISPLAY_LIST: GLenum = 0x82E7;
400    pub const DITHER: GLenum = 0x0BD0;
401    pub const DOMAIN: GLenum = 0x0A02;
402    pub const DONT_CARE: GLenum = 0x1100;
403    pub const DOT3_RGB: GLenum = 0x86AE;
404    pub const DOT3_RGBA: GLenum = 0x86AF;
405    pub const DOUBLE: GLenum = 0x140A;
406    pub const DOUBLEBUFFER: GLenum = 0x0C32;
407    pub const DRAW_BUFFER: GLenum = 0x0C01;
408    pub const DRAW_BUFFER0: GLenum = 0x8825;
409    pub const DRAW_BUFFER1: GLenum = 0x8826;
410    pub const DRAW_BUFFER10: GLenum = 0x882F;
411    pub const DRAW_BUFFER11: GLenum = 0x8830;
412    pub const DRAW_BUFFER12: GLenum = 0x8831;
413    pub const DRAW_BUFFER13: GLenum = 0x8832;
414    pub const DRAW_BUFFER14: GLenum = 0x8833;
415    pub const DRAW_BUFFER15: GLenum = 0x8834;
416    pub const DRAW_BUFFER2: GLenum = 0x8827;
417    pub const DRAW_BUFFER3: GLenum = 0x8828;
418    pub const DRAW_BUFFER4: GLenum = 0x8829;
419    pub const DRAW_BUFFER5: GLenum = 0x882A;
420    pub const DRAW_BUFFER6: GLenum = 0x882B;
421    pub const DRAW_BUFFER7: GLenum = 0x882C;
422    pub const DRAW_BUFFER8: GLenum = 0x882D;
423    pub const DRAW_BUFFER9: GLenum = 0x882E;
424    pub const DRAW_FRAMEBUFFER: GLenum = 0x8CA9;
425    pub const DRAW_FRAMEBUFFER_BINDING: GLenum = 0x8CA6;
426    pub const DRAW_PIXELS_APPLE: GLenum = 0x8A0A;
427    pub const DRAW_PIXEL_TOKEN: GLenum = 0x0705;
428    pub const DST_ALPHA: GLenum = 0x0304;
429    pub const DST_COLOR: GLenum = 0x0306;
430    pub const DYNAMIC_COPY: GLenum = 0x88EA;
431    pub const DYNAMIC_DRAW: GLenum = 0x88E8;
432    pub const DYNAMIC_READ: GLenum = 0x88E9;
433    pub const EDGE_FLAG: GLenum = 0x0B43;
434    pub const EDGE_FLAG_ARRAY: GLenum = 0x8079;
435    pub const EDGE_FLAG_ARRAY_BUFFER_BINDING: GLenum = 0x889B;
436    pub const EDGE_FLAG_ARRAY_POINTER: GLenum = 0x8093;
437    pub const EDGE_FLAG_ARRAY_STRIDE: GLenum = 0x808C;
438    pub const ELEMENT_ARRAY_BUFFER: GLenum = 0x8893;
439    pub const ELEMENT_ARRAY_BUFFER_BINDING: GLenum = 0x8895;
440    pub const EMISSION: GLenum = 0x1600;
441    pub const ENABLE_BIT: GLenum = 0x00002000;
442    pub const EQUAL: GLenum = 0x0202;
443    pub const EQUIV: GLenum = 0x1509;
444    pub const EVAL_BIT: GLenum = 0x00010000;
445    pub const EXCLUSION_KHR: GLenum = 0x92A0;
446    pub const EXP: GLenum = 0x0800;
447    pub const EXP2: GLenum = 0x0801;
448    pub const EXTENSIONS: GLenum = 0x1F03;
449    pub const EYE_LINEAR: GLenum = 0x2400;
450    pub const EYE_PLANE: GLenum = 0x2502;
451    pub const FALSE: GLenum = 0;
452    pub const FASTEST: GLenum = 0x1101;
453    pub const FEEDBACK: GLenum = 0x1C01;
454    pub const FEEDBACK_BUFFER_POINTER: GLenum = 0x0DF0;
455    pub const FEEDBACK_BUFFER_SIZE: GLenum = 0x0DF1;
456    pub const FEEDBACK_BUFFER_TYPE: GLenum = 0x0DF2;
457    pub const FENCE_APPLE: GLenum = 0x8A0B;
458    pub const FILL: GLenum = 0x1B02;
459    pub const FIRST_VERTEX_CONVENTION: GLenum = 0x8E4D;
460    pub const FIXED: GLenum = 0x140C;
461    pub const FIXED_ONLY: GLenum = 0x891D;
462    pub const FLAT: GLenum = 0x1D00;
463    pub const FLOAT: GLenum = 0x1406;
464    pub const FLOAT_32_UNSIGNED_INT_24_8_REV: GLenum = 0x8DAD;
465    pub const FLOAT_MAT2: GLenum = 0x8B5A;
466    pub const FLOAT_MAT2x3: GLenum = 0x8B65;
467    pub const FLOAT_MAT2x4: GLenum = 0x8B66;
468    pub const FLOAT_MAT3: GLenum = 0x8B5B;
469    pub const FLOAT_MAT3x2: GLenum = 0x8B67;
470    pub const FLOAT_MAT3x4: GLenum = 0x8B68;
471    pub const FLOAT_MAT4: GLenum = 0x8B5C;
472    pub const FLOAT_MAT4x2: GLenum = 0x8B69;
473    pub const FLOAT_MAT4x3: GLenum = 0x8B6A;
474    pub const FLOAT_VEC2: GLenum = 0x8B50;
475    pub const FLOAT_VEC3: GLenum = 0x8B51;
476    pub const FLOAT_VEC4: GLenum = 0x8B52;
477    pub const FOG: GLenum = 0x0B60;
478    pub const FOG_BIT: GLenum = 0x00000080;
479    pub const FOG_COLOR: GLenum = 0x0B66;
480    pub const FOG_COORD: GLenum = 0x8451;
481    pub const FOG_COORDINATE: GLenum = 0x8451;
482    pub const FOG_COORDINATE_ARRAY: GLenum = 0x8457;
483    pub const FOG_COORDINATE_ARRAY_BUFFER_BINDING: GLenum = 0x889D;
484    pub const FOG_COORDINATE_ARRAY_POINTER: GLenum = 0x8456;
485    pub const FOG_COORDINATE_ARRAY_STRIDE: GLenum = 0x8455;
486    pub const FOG_COORDINATE_ARRAY_TYPE: GLenum = 0x8454;
487    pub const FOG_COORDINATE_SOURCE: GLenum = 0x8450;
488    pub const FOG_COORD_ARRAY: GLenum = 0x8457;
489    pub const FOG_COORD_ARRAY_BUFFER_BINDING: GLenum = 0x889D;
490    pub const FOG_COORD_ARRAY_POINTER: GLenum = 0x8456;
491    pub const FOG_COORD_ARRAY_STRIDE: GLenum = 0x8455;
492    pub const FOG_COORD_ARRAY_TYPE: GLenum = 0x8454;
493    pub const FOG_COORD_SRC: GLenum = 0x8450;
494    pub const FOG_DENSITY: GLenum = 0x0B62;
495    pub const FOG_END: GLenum = 0x0B64;
496    pub const FOG_HINT: GLenum = 0x0C54;
497    pub const FOG_INDEX: GLenum = 0x0B61;
498    pub const FOG_MODE: GLenum = 0x0B65;
499    pub const FOG_START: GLenum = 0x0B63;
500    pub const FRAGMENT_DEPTH: GLenum = 0x8452;
501    pub const FRAGMENT_SHADER: GLenum = 0x8B30;
502    pub const FRAGMENT_SHADER_DERIVATIVE_HINT: GLenum = 0x8B8B;
503    pub const FRAMEBUFFER: GLenum = 0x8D40;
504    pub const FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE: GLenum = 0x8215;
505    pub const FRAMEBUFFER_ATTACHMENT_ANGLE: GLenum = 0x93A3;
506    pub const FRAMEBUFFER_ATTACHMENT_BLUE_SIZE: GLenum = 0x8214;
507    pub const FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING: GLenum = 0x8210;
508    pub const FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE: GLenum = 0x8211;
509    pub const FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE: GLenum = 0x8216;
510    pub const FRAMEBUFFER_ATTACHMENT_GREEN_SIZE: GLenum = 0x8213;
511    pub const FRAMEBUFFER_ATTACHMENT_LAYERED: GLenum = 0x8DA7;
512    pub const FRAMEBUFFER_ATTACHMENT_OBJECT_NAME: GLenum = 0x8CD1;
513    pub const FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE: GLenum = 0x8CD0;
514    pub const FRAMEBUFFER_ATTACHMENT_RED_SIZE: GLenum = 0x8212;
515    pub const FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE: GLenum = 0x8217;
516    pub const FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE: GLenum = 0x8CD3;
517    pub const FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER: GLenum = 0x8CD4;
518    pub const FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL: GLenum = 0x8CD2;
519    pub const FRAMEBUFFER_BINDING: GLenum = 0x8CA6;
520    pub const FRAMEBUFFER_COMPLETE: GLenum = 0x8CD5;
521    pub const FRAMEBUFFER_DEFAULT: GLenum = 0x8218;
522    pub const FRAMEBUFFER_INCOMPLETE_ATTACHMENT: GLenum = 0x8CD6;
523    pub const FRAMEBUFFER_INCOMPLETE_DIMENSIONS: GLenum = 0x8CD9;
524    pub const FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER: GLenum = 0x8CDB;
525    pub const FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS: GLenum = 0x8DA8;
526    pub const FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: GLenum = 0x8CD7;
527    pub const FRAMEBUFFER_INCOMPLETE_MULTISAMPLE: GLenum = 0x8D56;
528    pub const FRAMEBUFFER_INCOMPLETE_READ_BUFFER: GLenum = 0x8CDC;
529    pub const FRAMEBUFFER_SRGB: GLenum = 0x8DB9;
530    pub const FRAMEBUFFER_UNDEFINED: GLenum = 0x8219;
531    pub const FRAMEBUFFER_UNSUPPORTED: GLenum = 0x8CDD;
532    pub const FRONT: GLenum = 0x0404;
533    pub const FRONT_AND_BACK: GLenum = 0x0408;
534    pub const FRONT_FACE: GLenum = 0x0B46;
535    pub const FRONT_LEFT: GLenum = 0x0400;
536    pub const FRONT_RIGHT: GLenum = 0x0401;
537    pub const FUNC_ADD: GLenum = 0x8006;
538    pub const FUNC_REVERSE_SUBTRACT: GLenum = 0x800B;
539    pub const FUNC_SUBTRACT: GLenum = 0x800A;
540    pub const GENERATE_MIPMAP: GLenum = 0x8191;
541    pub const GENERATE_MIPMAP_HINT: GLenum = 0x8192;
542    pub const GEOMETRY_INPUT_TYPE: GLenum = 0x8917;
543    pub const GEOMETRY_OUTPUT_TYPE: GLenum = 0x8918;
544    pub const GEOMETRY_SHADER: GLenum = 0x8DD9;
545    pub const GEOMETRY_VERTICES_OUT: GLenum = 0x8916;
546    pub const GEQUAL: GLenum = 0x0206;
547    pub const GPU_DISJOINT_EXT: GLenum = 0x8FBB;
548    pub const GREATER: GLenum = 0x0204;
549    pub const GREEN: GLenum = 0x1904;
550    pub const GREEN_BIAS: GLenum = 0x0D19;
551    pub const GREEN_BITS: GLenum = 0x0D53;
552    pub const GREEN_INTEGER: GLenum = 0x8D95;
553    pub const GREEN_SCALE: GLenum = 0x0D18;
554    pub const HALF_FLOAT: GLenum = 0x140B;
555    pub const HALF_FLOAT_OES: GLenum = 0x8D61;
556    pub const HARDLIGHT_KHR: GLenum = 0x929B;
557    pub const HIGH_FLOAT: GLenum = 0x8DF2;
558    pub const HIGH_INT: GLenum = 0x8DF5;
559    pub const HINT_BIT: GLenum = 0x00008000;
560    pub const HSL_COLOR_KHR: GLenum = 0x92AF;
561    pub const HSL_HUE_KHR: GLenum = 0x92AD;
562    pub const HSL_LUMINOSITY_KHR: GLenum = 0x92B0;
563    pub const HSL_SATURATION_KHR: GLenum = 0x92AE;
564    pub const IMPLEMENTATION_COLOR_READ_FORMAT: GLenum = 0x8B9B;
565    pub const IMPLEMENTATION_COLOR_READ_TYPE: GLenum = 0x8B9A;
566    pub const INCR: GLenum = 0x1E02;
567    pub const INCR_WRAP: GLenum = 0x8507;
568    pub const INDEX: GLenum = 0x8222;
569    pub const INDEX_ARRAY: GLenum = 0x8077;
570    pub const INDEX_ARRAY_BUFFER_BINDING: GLenum = 0x8899;
571    pub const INDEX_ARRAY_POINTER: GLenum = 0x8091;
572    pub const INDEX_ARRAY_STRIDE: GLenum = 0x8086;
573    pub const INDEX_ARRAY_TYPE: GLenum = 0x8085;
574    pub const INDEX_BITS: GLenum = 0x0D51;
575    pub const INDEX_CLEAR_VALUE: GLenum = 0x0C20;
576    pub const INDEX_LOGIC_OP: GLenum = 0x0BF1;
577    pub const INDEX_MODE: GLenum = 0x0C30;
578    pub const INDEX_OFFSET: GLenum = 0x0D13;
579    pub const INDEX_SHIFT: GLenum = 0x0D12;
580    pub const INDEX_WRITEMASK: GLenum = 0x0C21;
581    pub const INFO_LOG_LENGTH: GLenum = 0x8B84;
582    pub const INT: GLenum = 0x1404;
583    pub const INTENSITY: GLenum = 0x8049;
584    pub const INTENSITY12: GLenum = 0x804C;
585    pub const INTENSITY16: GLenum = 0x804D;
586    pub const INTENSITY4: GLenum = 0x804A;
587    pub const INTENSITY8: GLenum = 0x804B;
588    pub const INTERLEAVED_ATTRIBS: GLenum = 0x8C8C;
589    pub const INTERPOLATE: GLenum = 0x8575;
590    pub const INT_2_10_10_10_REV: GLenum = 0x8D9F;
591    pub const INT_SAMPLER_1D: GLenum = 0x8DC9;
592    pub const INT_SAMPLER_1D_ARRAY: GLenum = 0x8DCE;
593    pub const INT_SAMPLER_2D: GLenum = 0x8DCA;
594    pub const INT_SAMPLER_2D_ARRAY: GLenum = 0x8DCF;
595    pub const INT_SAMPLER_2D_MULTISAMPLE: GLenum = 0x9109;
596    pub const INT_SAMPLER_2D_MULTISAMPLE_ARRAY: GLenum = 0x910C;
597    pub const INT_SAMPLER_2D_RECT: GLenum = 0x8DCD;
598    pub const INT_SAMPLER_3D: GLenum = 0x8DCB;
599    pub const INT_SAMPLER_BUFFER: GLenum = 0x8DD0;
600    pub const INT_SAMPLER_CUBE: GLenum = 0x8DCC;
601    pub const INT_VEC2: GLenum = 0x8B53;
602    pub const INT_VEC3: GLenum = 0x8B54;
603    pub const INT_VEC4: GLenum = 0x8B55;
604    pub const INVALID_ENUM: GLenum = 0x0500;
605    pub const INVALID_FRAMEBUFFER_OPERATION: GLenum = 0x0506;
606    pub const INVALID_INDEX: GLenum = 0xFFFFFFFF;
607    pub const INVALID_OPERATION: GLenum = 0x0502;
608    pub const INVALID_VALUE: GLenum = 0x0501;
609    pub const INVERT: GLenum = 0x150A;
610    pub const KEEP: GLenum = 0x1E00;
611    pub const LAST_VERTEX_CONVENTION: GLenum = 0x8E4E;
612    pub const LEFT: GLenum = 0x0406;
613    pub const LEQUAL: GLenum = 0x0203;
614    pub const LESS: GLenum = 0x0201;
615    pub const LIGHT0: GLenum = 0x4000;
616    pub const LIGHT1: GLenum = 0x4001;
617    pub const LIGHT2: GLenum = 0x4002;
618    pub const LIGHT3: GLenum = 0x4003;
619    pub const LIGHT4: GLenum = 0x4004;
620    pub const LIGHT5: GLenum = 0x4005;
621    pub const LIGHT6: GLenum = 0x4006;
622    pub const LIGHT7: GLenum = 0x4007;
623    pub const LIGHTEN_KHR: GLenum = 0x9298;
624    pub const LIGHTING: GLenum = 0x0B50;
625    pub const LIGHTING_BIT: GLenum = 0x00000040;
626    pub const LIGHT_MODEL_AMBIENT: GLenum = 0x0B53;
627    pub const LIGHT_MODEL_COLOR_CONTROL: GLenum = 0x81F8;
628    pub const LIGHT_MODEL_LOCAL_VIEWER: GLenum = 0x0B51;
629    pub const LIGHT_MODEL_TWO_SIDE: GLenum = 0x0B52;
630    pub const LINE: GLenum = 0x1B01;
631    pub const LINEAR: GLenum = 0x2601;
632    pub const LINEAR_ATTENUATION: GLenum = 0x1208;
633    pub const LINEAR_MIPMAP_LINEAR: GLenum = 0x2703;
634    pub const LINEAR_MIPMAP_NEAREST: GLenum = 0x2701;
635    pub const LINES: GLenum = 0x0001;
636    pub const LINES_ADJACENCY: GLenum = 0x000A;
637    pub const LINE_BIT: GLenum = 0x00000004;
638    pub const LINE_LOOP: GLenum = 0x0002;
639    pub const LINE_RESET_TOKEN: GLenum = 0x0707;
640    pub const LINE_SMOOTH: GLenum = 0x0B20;
641    pub const LINE_SMOOTH_HINT: GLenum = 0x0C52;
642    pub const LINE_STIPPLE: GLenum = 0x0B24;
643    pub const LINE_STIPPLE_PATTERN: GLenum = 0x0B25;
644    pub const LINE_STIPPLE_REPEAT: GLenum = 0x0B26;
645    pub const LINE_STRIP: GLenum = 0x0003;
646    pub const LINE_STRIP_ADJACENCY: GLenum = 0x000B;
647    pub const LINE_TOKEN: GLenum = 0x0702;
648    pub const LINE_WIDTH: GLenum = 0x0B21;
649    pub const LINE_WIDTH_GRANULARITY: GLenum = 0x0B23;
650    pub const LINE_WIDTH_RANGE: GLenum = 0x0B22;
651    pub const LINK_STATUS: GLenum = 0x8B82;
652    pub const LIST_BASE: GLenum = 0x0B32;
653    pub const LIST_BIT: GLenum = 0x00020000;
654    pub const LIST_INDEX: GLenum = 0x0B33;
655    pub const LIST_MODE: GLenum = 0x0B30;
656    pub const LOAD: GLenum = 0x0101;
657    pub const LOGIC_OP: GLenum = 0x0BF1;
658    pub const LOGIC_OP_MODE: GLenum = 0x0BF0;
659    pub const LOWER_LEFT: GLenum = 0x8CA1;
660    pub const LOW_FLOAT: GLenum = 0x8DF0;
661    pub const LOW_INT: GLenum = 0x8DF3;
662    pub const LUMINANCE: GLenum = 0x1909;
663    pub const LUMINANCE12: GLenum = 0x8041;
664    pub const LUMINANCE12_ALPHA12: GLenum = 0x8047;
665    pub const LUMINANCE12_ALPHA4: GLenum = 0x8046;
666    pub const LUMINANCE16: GLenum = 0x8042;
667    pub const LUMINANCE16F_EXT: GLenum = 0x881E;
668    pub const LUMINANCE16_ALPHA16: GLenum = 0x8048;
669    pub const LUMINANCE32F_EXT: GLenum = 0x8818;
670    pub const LUMINANCE4: GLenum = 0x803F;
671    pub const LUMINANCE4_ALPHA4: GLenum = 0x8043;
672    pub const LUMINANCE6_ALPHA2: GLenum = 0x8044;
673    pub const LUMINANCE8: GLenum = 0x8040;
674    pub const LUMINANCE8_ALPHA8: GLenum = 0x8045;
675    pub const LUMINANCE8_ALPHA8_EXT: GLenum = 0x8045;
676    pub const LUMINANCE8_EXT: GLenum = 0x8040;
677    pub const LUMINANCE_ALPHA: GLenum = 0x190A;
678    pub const LUMINANCE_ALPHA16F_EXT: GLenum = 0x881F;
679    pub const LUMINANCE_ALPHA32F_EXT: GLenum = 0x8819;
680    pub const MAJOR_VERSION: GLenum = 0x821B;
681    pub const MAP1_COLOR_4: GLenum = 0x0D90;
682    pub const MAP1_GRID_DOMAIN: GLenum = 0x0DD0;
683    pub const MAP1_GRID_SEGMENTS: GLenum = 0x0DD1;
684    pub const MAP1_INDEX: GLenum = 0x0D91;
685    pub const MAP1_NORMAL: GLenum = 0x0D92;
686    pub const MAP1_TEXTURE_COORD_1: GLenum = 0x0D93;
687    pub const MAP1_TEXTURE_COORD_2: GLenum = 0x0D94;
688    pub const MAP1_TEXTURE_COORD_3: GLenum = 0x0D95;
689    pub const MAP1_TEXTURE_COORD_4: GLenum = 0x0D96;
690    pub const MAP1_VERTEX_3: GLenum = 0x0D97;
691    pub const MAP1_VERTEX_4: GLenum = 0x0D98;
692    pub const MAP2_COLOR_4: GLenum = 0x0DB0;
693    pub const MAP2_GRID_DOMAIN: GLenum = 0x0DD2;
694    pub const MAP2_GRID_SEGMENTS: GLenum = 0x0DD3;
695    pub const MAP2_INDEX: GLenum = 0x0DB1;
696    pub const MAP2_NORMAL: GLenum = 0x0DB2;
697    pub const MAP2_TEXTURE_COORD_1: GLenum = 0x0DB3;
698    pub const MAP2_TEXTURE_COORD_2: GLenum = 0x0DB4;
699    pub const MAP2_TEXTURE_COORD_3: GLenum = 0x0DB5;
700    pub const MAP2_TEXTURE_COORD_4: GLenum = 0x0DB6;
701    pub const MAP2_VERTEX_3: GLenum = 0x0DB7;
702    pub const MAP2_VERTEX_4: GLenum = 0x0DB8;
703    pub const MAP_COLOR: GLenum = 0x0D10;
704    pub const MAP_FLUSH_EXPLICIT_BIT: GLenum = 0x0010;
705    pub const MAP_INVALIDATE_BUFFER_BIT: GLenum = 0x0008;
706    pub const MAP_INVALIDATE_RANGE_BIT: GLenum = 0x0004;
707    pub const MAP_READ_BIT: GLenum = 0x0001;
708    pub const MAP_STENCIL: GLenum = 0x0D11;
709    pub const MAP_UNSYNCHRONIZED_BIT: GLenum = 0x0020;
710    pub const MAP_WRITE_BIT: GLenum = 0x0002;
711    pub const MATRIX_MODE: GLenum = 0x0BA0;
712    pub const MAX: GLenum = 0x8008;
713    pub const MAX_3D_TEXTURE_SIZE: GLenum = 0x8073;
714    pub const MAX_ARRAY_TEXTURE_LAYERS: GLenum = 0x88FF;
715    pub const MAX_ATTRIB_STACK_DEPTH: GLenum = 0x0D35;
716    pub const MAX_CLIENT_ATTRIB_STACK_DEPTH: GLenum = 0x0D3B;
717    pub const MAX_CLIP_DISTANCES: GLenum = 0x0D32;
718    pub const MAX_CLIP_PLANES: GLenum = 0x0D32;
719    pub const MAX_COLOR_ATTACHMENTS: GLenum = 0x8CDF;
720    pub const MAX_COLOR_TEXTURE_SAMPLES: GLenum = 0x910E;
721    pub const MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS: GLenum = 0x8A33;
722    pub const MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS: GLenum = 0x8A32;
723    pub const MAX_COMBINED_TEXTURE_IMAGE_UNITS: GLenum = 0x8B4D;
724    pub const MAX_COMBINED_UNIFORM_BLOCKS: GLenum = 0x8A2E;
725    pub const MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS: GLenum = 0x8A31;
726    pub const MAX_CUBE_MAP_TEXTURE_SIZE: GLenum = 0x851C;
727    pub const MAX_DEBUG_GROUP_STACK_DEPTH: GLenum = 0x826C;
728    pub const MAX_DEBUG_GROUP_STACK_DEPTH_KHR: GLenum = 0x826C;
729    pub const MAX_DEBUG_LOGGED_MESSAGES: GLenum = 0x9144;
730    pub const MAX_DEBUG_LOGGED_MESSAGES_KHR: GLenum = 0x9144;
731    pub const MAX_DEBUG_MESSAGE_LENGTH: GLenum = 0x9143;
732    pub const MAX_DEBUG_MESSAGE_LENGTH_KHR: GLenum = 0x9143;
733    pub const MAX_DEPTH_TEXTURE_SAMPLES: GLenum = 0x910F;
734    pub const MAX_DRAW_BUFFERS: GLenum = 0x8824;
735    pub const MAX_DUAL_SOURCE_DRAW_BUFFERS: GLenum = 0x88FC;
736    pub const MAX_ELEMENTS_INDICES: GLenum = 0x80E9;
737    pub const MAX_ELEMENTS_VERTICES: GLenum = 0x80E8;
738    pub const MAX_ELEMENT_INDEX: GLenum = 0x8D6B;
739    pub const MAX_EVAL_ORDER: GLenum = 0x0D30;
740    pub const MAX_FRAGMENT_INPUT_COMPONENTS: GLenum = 0x9125;
741    pub const MAX_FRAGMENT_UNIFORM_BLOCKS: GLenum = 0x8A2D;
742    pub const MAX_FRAGMENT_UNIFORM_COMPONENTS: GLenum = 0x8B49;
743    pub const MAX_FRAGMENT_UNIFORM_VECTORS: GLenum = 0x8DFD;
744    pub const MAX_GEOMETRY_INPUT_COMPONENTS: GLenum = 0x9123;
745    pub const MAX_GEOMETRY_OUTPUT_COMPONENTS: GLenum = 0x9124;
746    pub const MAX_GEOMETRY_OUTPUT_VERTICES: GLenum = 0x8DE0;
747    pub const MAX_GEOMETRY_TEXTURE_IMAGE_UNITS: GLenum = 0x8C29;
748    pub const MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS: GLenum = 0x8DE1;
749    pub const MAX_GEOMETRY_UNIFORM_BLOCKS: GLenum = 0x8A2C;
750    pub const MAX_GEOMETRY_UNIFORM_COMPONENTS: GLenum = 0x8DDF;
751    pub const MAX_INTEGER_SAMPLES: GLenum = 0x9110;
752    pub const MAX_LABEL_LENGTH: GLenum = 0x82E8;
753    pub const MAX_LABEL_LENGTH_KHR: GLenum = 0x82E8;
754    pub const MAX_LIGHTS: GLenum = 0x0D31;
755    pub const MAX_LIST_NESTING: GLenum = 0x0B31;
756    pub const MAX_MODELVIEW_STACK_DEPTH: GLenum = 0x0D36;
757    pub const MAX_NAME_STACK_DEPTH: GLenum = 0x0D37;
758    pub const MAX_PIXEL_MAP_TABLE: GLenum = 0x0D34;
759    pub const MAX_PROGRAM_TEXEL_OFFSET: GLenum = 0x8905;
760    pub const MAX_PROJECTION_STACK_DEPTH: GLenum = 0x0D38;
761    pub const MAX_RECTANGLE_TEXTURE_SIZE: GLenum = 0x84F8;
762    pub const MAX_RECTANGLE_TEXTURE_SIZE_ARB: GLenum = 0x84F8;
763    pub const MAX_RENDERBUFFER_SIZE: GLenum = 0x84E8;
764    pub const MAX_SAMPLES: GLenum = 0x8D57;
765    pub const MAX_SAMPLE_MASK_WORDS: GLenum = 0x8E59;
766    pub const MAX_SERVER_WAIT_TIMEOUT: GLenum = 0x9111;
767    pub const MAX_SHADER_PIXEL_LOCAL_STORAGE_FAST_SIZE_EXT: GLenum = 0x8F63;
768    pub const MAX_SHADER_PIXEL_LOCAL_STORAGE_SIZE_EXT: GLenum = 0x8F67;
769    pub const MAX_TEXTURE_BUFFER_SIZE: GLenum = 0x8C2B;
770    pub const MAX_TEXTURE_COORDS: GLenum = 0x8871;
771    pub const MAX_TEXTURE_IMAGE_UNITS: GLenum = 0x8872;
772    pub const MAX_TEXTURE_LOD_BIAS: GLenum = 0x84FD;
773    pub const MAX_TEXTURE_MAX_ANISOTROPY_EXT: GLenum = 0x84FF;
774    pub const MAX_TEXTURE_SIZE: GLenum = 0x0D33;
775    pub const MAX_TEXTURE_STACK_DEPTH: GLenum = 0x0D39;
776    pub const MAX_TEXTURE_UNITS: GLenum = 0x84E2;
777    pub const MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS: GLenum = 0x8C8A;
778    pub const MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS: GLenum = 0x8C8B;
779    pub const MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS: GLenum = 0x8C80;
780    pub const MAX_UNIFORM_BLOCK_SIZE: GLenum = 0x8A30;
781    pub const MAX_UNIFORM_BUFFER_BINDINGS: GLenum = 0x8A2F;
782    pub const MAX_VARYING_COMPONENTS: GLenum = 0x8B4B;
783    pub const MAX_VARYING_FLOATS: GLenum = 0x8B4B;
784    pub const MAX_VARYING_VECTORS: GLenum = 0x8DFC;
785    pub const MAX_VERTEX_ATTRIBS: GLenum = 0x8869;
786    pub const MAX_VERTEX_OUTPUT_COMPONENTS: GLenum = 0x9122;
787    pub const MAX_VERTEX_TEXTURE_IMAGE_UNITS: GLenum = 0x8B4C;
788    pub const MAX_VERTEX_UNIFORM_BLOCKS: GLenum = 0x8A2B;
789    pub const MAX_VERTEX_UNIFORM_COMPONENTS: GLenum = 0x8B4A;
790    pub const MAX_VERTEX_UNIFORM_VECTORS: GLenum = 0x8DFB;
791    pub const MAX_VIEWPORT_DIMS: GLenum = 0x0D3A;
792    pub const MEDIUM_FLOAT: GLenum = 0x8DF1;
793    pub const MEDIUM_INT: GLenum = 0x8DF4;
794    pub const MIN: GLenum = 0x8007;
795    pub const MINOR_VERSION: GLenum = 0x821C;
796    pub const MIN_PROGRAM_TEXEL_OFFSET: GLenum = 0x8904;
797    pub const MIRRORED_REPEAT: GLenum = 0x8370;
798    pub const MODELVIEW: GLenum = 0x1700;
799    pub const MODELVIEW_MATRIX: GLenum = 0x0BA6;
800    pub const MODELVIEW_STACK_DEPTH: GLenum = 0x0BA3;
801    pub const MODULATE: GLenum = 0x2100;
802    pub const MULT: GLenum = 0x0103;
803    pub const MULTIPLY_KHR: GLenum = 0x9294;
804    pub const MULTISAMPLE: GLenum = 0x809D;
805    pub const MULTISAMPLE_BIT: GLenum = 0x20000000;
806    pub const N3F_V3F: GLenum = 0x2A25;
807    pub const NAME_STACK_DEPTH: GLenum = 0x0D70;
808    pub const NAND: GLenum = 0x150E;
809    pub const NEAREST: GLenum = 0x2600;
810    pub const NEAREST_MIPMAP_LINEAR: GLenum = 0x2702;
811    pub const NEAREST_MIPMAP_NEAREST: GLenum = 0x2700;
812    pub const NEVER: GLenum = 0x0200;
813    pub const NICEST: GLenum = 0x1102;
814    pub const NONE: GLenum = 0;
815    pub const NOOP: GLenum = 0x1505;
816    pub const NOR: GLenum = 0x1508;
817    pub const NORMALIZE: GLenum = 0x0BA1;
818    pub const NORMAL_ARRAY: GLenum = 0x8075;
819    pub const NORMAL_ARRAY_BUFFER_BINDING: GLenum = 0x8897;
820    pub const NORMAL_ARRAY_POINTER: GLenum = 0x808F;
821    pub const NORMAL_ARRAY_STRIDE: GLenum = 0x807F;
822    pub const NORMAL_ARRAY_TYPE: GLenum = 0x807E;
823    pub const NORMAL_MAP: GLenum = 0x8511;
824    pub const NOTEQUAL: GLenum = 0x0205;
825    pub const NO_ERROR: GLenum = 0;
826    pub const NUM_COMPRESSED_TEXTURE_FORMATS: GLenum = 0x86A2;
827    pub const NUM_EXTENSIONS: GLenum = 0x821D;
828    pub const NUM_PROGRAM_BINARY_FORMATS: GLenum = 0x87FE;
829    pub const NUM_SAMPLE_COUNTS: GLenum = 0x9380;
830    pub const NUM_SHADER_BINARY_FORMATS: GLenum = 0x8DF9;
831    pub const OBJECT_LINEAR: GLenum = 0x2401;
832    pub const OBJECT_PLANE: GLenum = 0x2501;
833    pub const OBJECT_TYPE: GLenum = 0x9112;
834    pub const ONE: GLenum = 1;
835    pub const ONE_MINUS_CONSTANT_ALPHA: GLenum = 0x8004;
836    pub const ONE_MINUS_CONSTANT_COLOR: GLenum = 0x8002;
837    pub const ONE_MINUS_DST_ALPHA: GLenum = 0x0305;
838    pub const ONE_MINUS_DST_COLOR: GLenum = 0x0307;
839    pub const ONE_MINUS_SRC1_ALPHA: GLenum = 0x88FB;
840    pub const ONE_MINUS_SRC1_COLOR: GLenum = 0x88FA;
841    pub const ONE_MINUS_SRC_ALPHA: GLenum = 0x0303;
842    pub const ONE_MINUS_SRC_COLOR: GLenum = 0x0301;
843    pub const OPERAND0_ALPHA: GLenum = 0x8598;
844    pub const OPERAND0_RGB: GLenum = 0x8590;
845    pub const OPERAND1_ALPHA: GLenum = 0x8599;
846    pub const OPERAND1_RGB: GLenum = 0x8591;
847    pub const OPERAND2_ALPHA: GLenum = 0x859A;
848    pub const OPERAND2_RGB: GLenum = 0x8592;
849    pub const OR: GLenum = 0x1507;
850    pub const ORDER: GLenum = 0x0A01;
851    pub const OR_INVERTED: GLenum = 0x150D;
852    pub const OR_REVERSE: GLenum = 0x150B;
853    pub const OUT_OF_MEMORY: GLenum = 0x0505;
854    pub const OVERLAY_KHR: GLenum = 0x9296;
855    pub const PACK_ALIGNMENT: GLenum = 0x0D05;
856    pub const PACK_IMAGE_HEIGHT: GLenum = 0x806C;
857    pub const PACK_LSB_FIRST: GLenum = 0x0D01;
858    pub const PACK_ROW_LENGTH: GLenum = 0x0D02;
859    pub const PACK_SKIP_IMAGES: GLenum = 0x806B;
860    pub const PACK_SKIP_PIXELS: GLenum = 0x0D04;
861    pub const PACK_SKIP_ROWS: GLenum = 0x0D03;
862    pub const PACK_SWAP_BYTES: GLenum = 0x0D00;
863    pub const PASS_THROUGH_TOKEN: GLenum = 0x0700;
864    pub const PERSPECTIVE_CORRECTION_HINT: GLenum = 0x0C50;
865    pub const PIXEL_MAP_A_TO_A: GLenum = 0x0C79;
866    pub const PIXEL_MAP_A_TO_A_SIZE: GLenum = 0x0CB9;
867    pub const PIXEL_MAP_B_TO_B: GLenum = 0x0C78;
868    pub const PIXEL_MAP_B_TO_B_SIZE: GLenum = 0x0CB8;
869    pub const PIXEL_MAP_G_TO_G: GLenum = 0x0C77;
870    pub const PIXEL_MAP_G_TO_G_SIZE: GLenum = 0x0CB7;
871    pub const PIXEL_MAP_I_TO_A: GLenum = 0x0C75;
872    pub const PIXEL_MAP_I_TO_A_SIZE: GLenum = 0x0CB5;
873    pub const PIXEL_MAP_I_TO_B: GLenum = 0x0C74;
874    pub const PIXEL_MAP_I_TO_B_SIZE: GLenum = 0x0CB4;
875    pub const PIXEL_MAP_I_TO_G: GLenum = 0x0C73;
876    pub const PIXEL_MAP_I_TO_G_SIZE: GLenum = 0x0CB3;
877    pub const PIXEL_MAP_I_TO_I: GLenum = 0x0C70;
878    pub const PIXEL_MAP_I_TO_I_SIZE: GLenum = 0x0CB0;
879    pub const PIXEL_MAP_I_TO_R: GLenum = 0x0C72;
880    pub const PIXEL_MAP_I_TO_R_SIZE: GLenum = 0x0CB2;
881    pub const PIXEL_MAP_R_TO_R: GLenum = 0x0C76;
882    pub const PIXEL_MAP_R_TO_R_SIZE: GLenum = 0x0CB6;
883    pub const PIXEL_MAP_S_TO_S: GLenum = 0x0C71;
884    pub const PIXEL_MAP_S_TO_S_SIZE: GLenum = 0x0CB1;
885    pub const PIXEL_MODE_BIT: GLenum = 0x00000020;
886    pub const PIXEL_PACK_BUFFER: GLenum = 0x88EB;
887    pub const PIXEL_PACK_BUFFER_BINDING: GLenum = 0x88ED;
888    pub const PIXEL_UNPACK_BUFFER: GLenum = 0x88EC;
889    pub const PIXEL_UNPACK_BUFFER_BINDING: GLenum = 0x88EF;
890    pub const POINT: GLenum = 0x1B00;
891    pub const POINTS: GLenum = 0x0000;
892    pub const POINT_BIT: GLenum = 0x00000002;
893    pub const POINT_DISTANCE_ATTENUATION: GLenum = 0x8129;
894    pub const POINT_FADE_THRESHOLD_SIZE: GLenum = 0x8128;
895    pub const POINT_SIZE: GLenum = 0x0B11;
896    pub const POINT_SIZE_GRANULARITY: GLenum = 0x0B13;
897    pub const POINT_SIZE_MAX: GLenum = 0x8127;
898    pub const POINT_SIZE_MIN: GLenum = 0x8126;
899    pub const POINT_SIZE_RANGE: GLenum = 0x0B12;
900    pub const POINT_SMOOTH: GLenum = 0x0B10;
901    pub const POINT_SMOOTH_HINT: GLenum = 0x0C51;
902    pub const POINT_SPRITE: GLenum = 0x8861;
903    pub const POINT_SPRITE_COORD_ORIGIN: GLenum = 0x8CA0;
904    pub const POINT_TOKEN: GLenum = 0x0701;
905    pub const POLYGON: GLenum = 0x0009;
906    pub const POLYGON_BIT: GLenum = 0x00000008;
907    pub const POLYGON_MODE: GLenum = 0x0B40;
908    pub const POLYGON_OFFSET_FACTOR: GLenum = 0x8038;
909    pub const POLYGON_OFFSET_FILL: GLenum = 0x8037;
910    pub const POLYGON_OFFSET_LINE: GLenum = 0x2A02;
911    pub const POLYGON_OFFSET_POINT: GLenum = 0x2A01;
912    pub const POLYGON_OFFSET_UNITS: GLenum = 0x2A00;
913    pub const POLYGON_SMOOTH: GLenum = 0x0B41;
914    pub const POLYGON_SMOOTH_HINT: GLenum = 0x0C53;
915    pub const POLYGON_STIPPLE: GLenum = 0x0B42;
916    pub const POLYGON_STIPPLE_BIT: GLenum = 0x00000010;
917    pub const POLYGON_TOKEN: GLenum = 0x0703;
918    pub const POSITION: GLenum = 0x1203;
919    pub const PREVIOUS: GLenum = 0x8578;
920    pub const PRIMARY_COLOR: GLenum = 0x8577;
921    pub const PRIMITIVES_GENERATED: GLenum = 0x8C87;
922    pub const PRIMITIVE_RESTART: GLenum = 0x8F9D;
923    pub const PRIMITIVE_RESTART_FIXED_INDEX: GLenum = 0x8D69;
924    pub const PRIMITIVE_RESTART_INDEX: GLenum = 0x8F9E;
925    pub const PROGRAM: GLenum = 0x82E2;
926    pub const PROGRAM_BINARY_FORMATS: GLenum = 0x87FF;
927    pub const PROGRAM_BINARY_LENGTH: GLenum = 0x8741;
928    pub const PROGRAM_BINARY_RETRIEVABLE_HINT: GLenum = 0x8257;
929    pub const PROGRAM_KHR: GLenum = 0x82E2;
930    pub const PROGRAM_PIPELINE: GLenum = 0x82E4;
931    pub const PROGRAM_PIPELINE_KHR: GLenum = 0x82E4;
932    pub const PROGRAM_POINT_SIZE: GLenum = 0x8642;
933    pub const PROJECTION: GLenum = 0x1701;
934    pub const PROJECTION_MATRIX: GLenum = 0x0BA7;
935    pub const PROJECTION_STACK_DEPTH: GLenum = 0x0BA4;
936    pub const PROVOKING_VERTEX: GLenum = 0x8E4F;
937    pub const PROXY_TEXTURE_1D: GLenum = 0x8063;
938    pub const PROXY_TEXTURE_1D_ARRAY: GLenum = 0x8C19;
939    pub const PROXY_TEXTURE_2D: GLenum = 0x8064;
940    pub const PROXY_TEXTURE_2D_ARRAY: GLenum = 0x8C1B;
941    pub const PROXY_TEXTURE_2D_MULTISAMPLE: GLenum = 0x9101;
942    pub const PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY: GLenum = 0x9103;
943    pub const PROXY_TEXTURE_3D: GLenum = 0x8070;
944    pub const PROXY_TEXTURE_CUBE_MAP: GLenum = 0x851B;
945    pub const PROXY_TEXTURE_RECTANGLE: GLenum = 0x84F7;
946    pub const PROXY_TEXTURE_RECTANGLE_ARB: GLenum = 0x84F7;
947    pub const Q: GLenum = 0x2003;
948    pub const QUADRATIC_ATTENUATION: GLenum = 0x1209;
949    pub const QUADS: GLenum = 0x0007;
950    pub const QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION: GLenum = 0x8E4C;
951    pub const QUAD_STRIP: GLenum = 0x0008;
952    pub const QUERY: GLenum = 0x82E3;
953    pub const QUERY_BY_REGION_NO_WAIT: GLenum = 0x8E16;
954    pub const QUERY_BY_REGION_WAIT: GLenum = 0x8E15;
955    pub const QUERY_COUNTER_BITS: GLenum = 0x8864;
956    pub const QUERY_COUNTER_BITS_EXT: GLenum = 0x8864;
957    pub const QUERY_KHR: GLenum = 0x82E3;
958    pub const QUERY_NO_WAIT: GLenum = 0x8E14;
959    pub const QUERY_RESULT: GLenum = 0x8866;
960    pub const QUERY_RESULT_AVAILABLE: GLenum = 0x8867;
961    pub const QUERY_RESULT_AVAILABLE_EXT: GLenum = 0x8867;
962    pub const QUERY_RESULT_EXT: GLenum = 0x8866;
963    pub const QUERY_WAIT: GLenum = 0x8E13;
964    pub const R: GLenum = 0x2002;
965    pub const R11F_G11F_B10F: GLenum = 0x8C3A;
966    pub const R16: GLenum = 0x822A;
967    pub const R16F: GLenum = 0x822D;
968    pub const R16F_EXT: GLenum = 0x822D;
969    pub const R16I: GLenum = 0x8233;
970    pub const R16UI: GLenum = 0x8234;
971    pub const R16_SNORM: GLenum = 0x8F98;
972    pub const R32F: GLenum = 0x822E;
973    pub const R32F_EXT: GLenum = 0x822E;
974    pub const R32I: GLenum = 0x8235;
975    pub const R32UI: GLenum = 0x8236;
976    pub const R3_G3_B2: GLenum = 0x2A10;
977    pub const R8: GLenum = 0x8229;
978    pub const R8I: GLenum = 0x8231;
979    pub const R8UI: GLenum = 0x8232;
980    pub const R8_EXT: GLenum = 0x8229;
981    pub const R8_SNORM: GLenum = 0x8F94;
982    pub const RASTERIZER_DISCARD: GLenum = 0x8C89;
983    pub const READ_BUFFER: GLenum = 0x0C02;
984    pub const READ_FRAMEBUFFER: GLenum = 0x8CA8;
985    pub const READ_FRAMEBUFFER_BINDING: GLenum = 0x8CAA;
986    pub const READ_ONLY: GLenum = 0x88B8;
987    pub const READ_WRITE: GLenum = 0x88BA;
988    pub const RED: GLenum = 0x1903;
989    pub const RED_BIAS: GLenum = 0x0D15;
990    pub const RED_BITS: GLenum = 0x0D52;
991    pub const RED_INTEGER: GLenum = 0x8D94;
992    pub const RED_SCALE: GLenum = 0x0D14;
993    pub const REFLECTION_MAP: GLenum = 0x8512;
994    pub const RENDER: GLenum = 0x1C00;
995    pub const RENDERBUFFER: GLenum = 0x8D41;
996    pub const RENDERBUFFER_ALPHA_SIZE: GLenum = 0x8D53;
997    pub const RENDERBUFFER_BINDING: GLenum = 0x8CA7;
998    pub const RENDERBUFFER_BLUE_SIZE: GLenum = 0x8D52;
999    pub const RENDERBUFFER_DEPTH_SIZE: GLenum = 0x8D54;
1000    pub const RENDERBUFFER_GREEN_SIZE: GLenum = 0x8D51;
1001    pub const RENDERBUFFER_HEIGHT: GLenum = 0x8D43;
1002    pub const RENDERBUFFER_INTERNAL_FORMAT: GLenum = 0x8D44;
1003    pub const RENDERBUFFER_RED_SIZE: GLenum = 0x8D50;
1004    pub const RENDERBUFFER_SAMPLES: GLenum = 0x8CAB;
1005    pub const RENDERBUFFER_STENCIL_SIZE: GLenum = 0x8D55;
1006    pub const RENDERBUFFER_WIDTH: GLenum = 0x8D42;
1007    pub const RENDERER: GLenum = 0x1F01;
1008    pub const RENDER_MODE: GLenum = 0x0C40;
1009    pub const REPEAT: GLenum = 0x2901;
1010    pub const REPLACE: GLenum = 0x1E01;
1011    pub const REQUIRED_TEXTURE_IMAGE_UNITS_OES: GLenum = 0x8D68;
1012    pub const RESCALE_NORMAL: GLenum = 0x803A;
1013    pub const RETURN: GLenum = 0x0102;
1014    pub const RG: GLenum = 0x8227;
1015    pub const RG16: GLenum = 0x822C;
1016    pub const RG16F: GLenum = 0x822F;
1017    pub const RG16F_EXT: GLenum = 0x822F;
1018    pub const RG16I: GLenum = 0x8239;
1019    pub const RG16UI: GLenum = 0x823A;
1020    pub const RG16_SNORM: GLenum = 0x8F99;
1021    pub const RG32F: GLenum = 0x8230;
1022    pub const RG32F_EXT: GLenum = 0x8230;
1023    pub const RG32I: GLenum = 0x823B;
1024    pub const RG32UI: GLenum = 0x823C;
1025    pub const RG8: GLenum = 0x822B;
1026    pub const RG8I: GLenum = 0x8237;
1027    pub const RG8UI: GLenum = 0x8238;
1028    pub const RG8_EXT: GLenum = 0x822B;
1029    pub const RG8_SNORM: GLenum = 0x8F95;
1030    pub const RGB: GLenum = 0x1907;
1031    pub const RGB10: GLenum = 0x8052;
1032    pub const RGB10_A2: GLenum = 0x8059;
1033    pub const RGB10_A2UI: GLenum = 0x906F;
1034    pub const RGB10_A2_EXT: GLenum = 0x8059;
1035    pub const RGB10_EXT: GLenum = 0x8052;
1036    pub const RGB12: GLenum = 0x8053;
1037    pub const RGB16: GLenum = 0x8054;
1038    pub const RGB16F: GLenum = 0x881B;
1039    pub const RGB16F_EXT: GLenum = 0x881B;
1040    pub const RGB16I: GLenum = 0x8D89;
1041    pub const RGB16UI: GLenum = 0x8D77;
1042    pub const RGB16_SNORM: GLenum = 0x8F9A;
1043    pub const RGB32F: GLenum = 0x8815;
1044    pub const RGB32F_EXT: GLenum = 0x8815;
1045    pub const RGB32I: GLenum = 0x8D83;
1046    pub const RGB32UI: GLenum = 0x8D71;
1047    pub const RGB4: GLenum = 0x804F;
1048    pub const RGB5: GLenum = 0x8050;
1049    pub const RGB565: GLenum = 0x8D62;
1050    pub const RGB5_A1: GLenum = 0x8057;
1051    pub const RGB8: GLenum = 0x8051;
1052    pub const RGB8I: GLenum = 0x8D8F;
1053    pub const RGB8UI: GLenum = 0x8D7D;
1054    pub const RGB8_SNORM: GLenum = 0x8F96;
1055    pub const RGB9_E5: GLenum = 0x8C3D;
1056    pub const RGBA: GLenum = 0x1908;
1057    pub const RGBA12: GLenum = 0x805A;
1058    pub const RGBA16: GLenum = 0x805B;
1059    pub const RGBA16F: GLenum = 0x881A;
1060    pub const RGBA16F_EXT: GLenum = 0x881A;
1061    pub const RGBA16I: GLenum = 0x8D88;
1062    pub const RGBA16UI: GLenum = 0x8D76;
1063    pub const RGBA16_SNORM: GLenum = 0x8F9B;
1064    pub const RGBA2: GLenum = 0x8055;
1065    pub const RGBA32F: GLenum = 0x8814;
1066    pub const RGBA32F_EXT: GLenum = 0x8814;
1067    pub const RGBA32I: GLenum = 0x8D82;
1068    pub const RGBA32UI: GLenum = 0x8D70;
1069    pub const RGBA4: GLenum = 0x8056;
1070    pub const RGBA8: GLenum = 0x8058;
1071    pub const RGBA8I: GLenum = 0x8D8E;
1072    pub const RGBA8UI: GLenum = 0x8D7C;
1073    pub const RGBA8_SNORM: GLenum = 0x8F97;
1074    pub const RGBA_INTEGER: GLenum = 0x8D99;
1075    pub const RGBA_MODE: GLenum = 0x0C31;
1076    pub const RGB_INTEGER: GLenum = 0x8D98;
1077    pub const RGB_SCALE: GLenum = 0x8573;
1078    pub const RG_INTEGER: GLenum = 0x8228;
1079    pub const RIGHT: GLenum = 0x0407;
1080    pub const S: GLenum = 0x2000;
1081    pub const SAMPLER: GLenum = 0x82E6;
1082    pub const SAMPLER_1D: GLenum = 0x8B5D;
1083    pub const SAMPLER_1D_ARRAY: GLenum = 0x8DC0;
1084    pub const SAMPLER_1D_ARRAY_SHADOW: GLenum = 0x8DC3;
1085    pub const SAMPLER_1D_SHADOW: GLenum = 0x8B61;
1086    pub const SAMPLER_2D: GLenum = 0x8B5E;
1087    pub const SAMPLER_2D_ARRAY: GLenum = 0x8DC1;
1088    pub const SAMPLER_2D_ARRAY_SHADOW: GLenum = 0x8DC4;
1089    pub const SAMPLER_2D_MULTISAMPLE: GLenum = 0x9108;
1090    pub const SAMPLER_2D_MULTISAMPLE_ARRAY: GLenum = 0x910B;
1091    pub const SAMPLER_2D_RECT: GLenum = 0x8B63;
1092    pub const SAMPLER_2D_RECT_SHADOW: GLenum = 0x8B64;
1093    pub const SAMPLER_2D_SHADOW: GLenum = 0x8B62;
1094    pub const SAMPLER_3D: GLenum = 0x8B5F;
1095    pub const SAMPLER_BINDING: GLenum = 0x8919;
1096    pub const SAMPLER_BUFFER: GLenum = 0x8DC2;
1097    pub const SAMPLER_CUBE: GLenum = 0x8B60;
1098    pub const SAMPLER_CUBE_SHADOW: GLenum = 0x8DC5;
1099    pub const SAMPLER_EXTERNAL_OES: GLenum = 0x8D66;
1100    pub const SAMPLER_KHR: GLenum = 0x82E6;
1101    pub const SAMPLES: GLenum = 0x80A9;
1102    pub const SAMPLES_PASSED: GLenum = 0x8914;
1103    pub const SAMPLE_ALPHA_TO_COVERAGE: GLenum = 0x809E;
1104    pub const SAMPLE_ALPHA_TO_ONE: GLenum = 0x809F;
1105    pub const SAMPLE_BUFFERS: GLenum = 0x80A8;
1106    pub const SAMPLE_COVERAGE: GLenum = 0x80A0;
1107    pub const SAMPLE_COVERAGE_INVERT: GLenum = 0x80AB;
1108    pub const SAMPLE_COVERAGE_VALUE: GLenum = 0x80AA;
1109    pub const SAMPLE_MASK: GLenum = 0x8E51;
1110    pub const SAMPLE_MASK_VALUE: GLenum = 0x8E52;
1111    pub const SAMPLE_POSITION: GLenum = 0x8E50;
1112    pub const SCISSOR_BIT: GLenum = 0x00080000;
1113    pub const SCISSOR_BOX: GLenum = 0x0C10;
1114    pub const SCISSOR_TEST: GLenum = 0x0C11;
1115    pub const SCREEN_KHR: GLenum = 0x9295;
1116    pub const SECONDARY_COLOR_ARRAY: GLenum = 0x845E;
1117    pub const SECONDARY_COLOR_ARRAY_BUFFER_BINDING: GLenum = 0x889C;
1118    pub const SECONDARY_COLOR_ARRAY_POINTER: GLenum = 0x845D;
1119    pub const SECONDARY_COLOR_ARRAY_SIZE: GLenum = 0x845A;
1120    pub const SECONDARY_COLOR_ARRAY_STRIDE: GLenum = 0x845C;
1121    pub const SECONDARY_COLOR_ARRAY_TYPE: GLenum = 0x845B;
1122    pub const SELECT: GLenum = 0x1C02;
1123    pub const SELECTION_BUFFER_POINTER: GLenum = 0x0DF3;
1124    pub const SELECTION_BUFFER_SIZE: GLenum = 0x0DF4;
1125    pub const SEPARATE_ATTRIBS: GLenum = 0x8C8D;
1126    pub const SEPARATE_SPECULAR_COLOR: GLenum = 0x81FA;
1127    pub const SET: GLenum = 0x150F;
1128    pub const SHADER: GLenum = 0x82E1;
1129    pub const SHADER_BINARY_FORMATS: GLenum = 0x8DF8;
1130    pub const SHADER_COMPILER: GLenum = 0x8DFA;
1131    pub const SHADER_KHR: GLenum = 0x82E1;
1132    pub const SHADER_PIXEL_LOCAL_STORAGE_EXT: GLenum = 0x8F64;
1133    pub const SHADER_SOURCE_LENGTH: GLenum = 0x8B88;
1134    pub const SHADER_TYPE: GLenum = 0x8B4F;
1135    pub const SHADE_MODEL: GLenum = 0x0B54;
1136    pub const SHADING_LANGUAGE_VERSION: GLenum = 0x8B8C;
1137    pub const SHININESS: GLenum = 0x1601;
1138    pub const SHORT: GLenum = 0x1402;
1139    pub const SIGNALED: GLenum = 0x9119;
1140    pub const SIGNED_NORMALIZED: GLenum = 0x8F9C;
1141    pub const SINGLE_COLOR: GLenum = 0x81F9;
1142    pub const SLUMINANCE: GLenum = 0x8C46;
1143    pub const SLUMINANCE8: GLenum = 0x8C47;
1144    pub const SLUMINANCE8_ALPHA8: GLenum = 0x8C45;
1145    pub const SLUMINANCE_ALPHA: GLenum = 0x8C44;
1146    pub const SMOOTH: GLenum = 0x1D01;
1147    pub const SMOOTH_LINE_WIDTH_GRANULARITY: GLenum = 0x0B23;
1148    pub const SMOOTH_LINE_WIDTH_RANGE: GLenum = 0x0B22;
1149    pub const SMOOTH_POINT_SIZE_GRANULARITY: GLenum = 0x0B13;
1150    pub const SMOOTH_POINT_SIZE_RANGE: GLenum = 0x0B12;
1151    pub const SOFTLIGHT_KHR: GLenum = 0x929C;
1152    pub const SOURCE0_ALPHA: GLenum = 0x8588;
1153    pub const SOURCE0_RGB: GLenum = 0x8580;
1154    pub const SOURCE1_ALPHA: GLenum = 0x8589;
1155    pub const SOURCE1_RGB: GLenum = 0x8581;
1156    pub const SOURCE2_ALPHA: GLenum = 0x858A;
1157    pub const SOURCE2_RGB: GLenum = 0x8582;
1158    pub const SPECULAR: GLenum = 0x1202;
1159    pub const SPHERE_MAP: GLenum = 0x2402;
1160    pub const SPOT_CUTOFF: GLenum = 0x1206;
1161    pub const SPOT_DIRECTION: GLenum = 0x1204;
1162    pub const SPOT_EXPONENT: GLenum = 0x1205;
1163    pub const SRC0_ALPHA: GLenum = 0x8588;
1164    pub const SRC0_RGB: GLenum = 0x8580;
1165    pub const SRC1_ALPHA: GLenum = 0x8589;
1166    pub const SRC1_COLOR: GLenum = 0x88F9;
1167    pub const SRC1_RGB: GLenum = 0x8581;
1168    pub const SRC2_ALPHA: GLenum = 0x858A;
1169    pub const SRC2_RGB: GLenum = 0x8582;
1170    pub const SRC_ALPHA: GLenum = 0x0302;
1171    pub const SRC_ALPHA_SATURATE: GLenum = 0x0308;
1172    pub const SRC_COLOR: GLenum = 0x0300;
1173    pub const SRGB: GLenum = 0x8C40;
1174    pub const SRGB8: GLenum = 0x8C41;
1175    pub const SRGB8_ALPHA8: GLenum = 0x8C43;
1176    pub const SRGB_ALPHA: GLenum = 0x8C42;
1177    pub const STACK_OVERFLOW: GLenum = 0x0503;
1178    pub const STACK_OVERFLOW_KHR: GLenum = 0x0503;
1179    pub const STACK_UNDERFLOW: GLenum = 0x0504;
1180    pub const STACK_UNDERFLOW_KHR: GLenum = 0x0504;
1181    pub const STATIC_COPY: GLenum = 0x88E6;
1182    pub const STATIC_DRAW: GLenum = 0x88E4;
1183    pub const STATIC_READ: GLenum = 0x88E5;
1184    pub const STENCIL: GLenum = 0x1802;
1185    pub const STENCIL_ATTACHMENT: GLenum = 0x8D20;
1186    pub const STENCIL_BACK_FAIL: GLenum = 0x8801;
1187    pub const STENCIL_BACK_FUNC: GLenum = 0x8800;
1188    pub const STENCIL_BACK_PASS_DEPTH_FAIL: GLenum = 0x8802;
1189    pub const STENCIL_BACK_PASS_DEPTH_PASS: GLenum = 0x8803;
1190    pub const STENCIL_BACK_REF: GLenum = 0x8CA3;
1191    pub const STENCIL_BACK_VALUE_MASK: GLenum = 0x8CA4;
1192    pub const STENCIL_BACK_WRITEMASK: GLenum = 0x8CA5;
1193    pub const STENCIL_BITS: GLenum = 0x0D57;
1194    pub const STENCIL_BUFFER_BIT: GLenum = 0x00000400;
1195    pub const STENCIL_CLEAR_VALUE: GLenum = 0x0B91;
1196    pub const STENCIL_FAIL: GLenum = 0x0B94;
1197    pub const STENCIL_FUNC: GLenum = 0x0B92;
1198    pub const STENCIL_INDEX: GLenum = 0x1901;
1199    pub const STENCIL_INDEX1: GLenum = 0x8D46;
1200    pub const STENCIL_INDEX16: GLenum = 0x8D49;
1201    pub const STENCIL_INDEX4: GLenum = 0x8D47;
1202    pub const STENCIL_INDEX8: GLenum = 0x8D48;
1203    pub const STENCIL_PASS_DEPTH_FAIL: GLenum = 0x0B95;
1204    pub const STENCIL_PASS_DEPTH_PASS: GLenum = 0x0B96;
1205    pub const STENCIL_REF: GLenum = 0x0B97;
1206    pub const STENCIL_TEST: GLenum = 0x0B90;
1207    pub const STENCIL_VALUE_MASK: GLenum = 0x0B93;
1208    pub const STENCIL_WRITEMASK: GLenum = 0x0B98;
1209    pub const STEREO: GLenum = 0x0C33;
1210    pub const STORAGE_CACHED_APPLE: GLenum = 0x85BE;
1211    pub const STORAGE_PRIVATE_APPLE: GLenum = 0x85BD;
1212    pub const STORAGE_SHARED_APPLE: GLenum = 0x85BF;
1213    pub const STREAM_COPY: GLenum = 0x88E2;
1214    pub const STREAM_DRAW: GLenum = 0x88E0;
1215    pub const STREAM_READ: GLenum = 0x88E1;
1216    pub const SUBPIXEL_BITS: GLenum = 0x0D50;
1217    pub const SUBTRACT: GLenum = 0x84E7;
1218    pub const SYNC_CONDITION: GLenum = 0x9113;
1219    pub const SYNC_FENCE: GLenum = 0x9116;
1220    pub const SYNC_FLAGS: GLenum = 0x9115;
1221    pub const SYNC_FLUSH_COMMANDS_BIT: GLenum = 0x00000001;
1222    pub const SYNC_GPU_COMMANDS_COMPLETE: GLenum = 0x9117;
1223    pub const SYNC_STATUS: GLenum = 0x9114;
1224    pub const T: GLenum = 0x2001;
1225    pub const T2F_C3F_V3F: GLenum = 0x2A2A;
1226    pub const T2F_C4F_N3F_V3F: GLenum = 0x2A2C;
1227    pub const T2F_C4UB_V3F: GLenum = 0x2A29;
1228    pub const T2F_N3F_V3F: GLenum = 0x2A2B;
1229    pub const T2F_V3F: GLenum = 0x2A27;
1230    pub const T4F_C4F_N3F_V4F: GLenum = 0x2A2D;
1231    pub const T4F_V4F: GLenum = 0x2A28;
1232    pub const TEXTURE: GLenum = 0x1702;
1233    pub const TEXTURE0: GLenum = 0x84C0;
1234    pub const TEXTURE1: GLenum = 0x84C1;
1235    pub const TEXTURE10: GLenum = 0x84CA;
1236    pub const TEXTURE11: GLenum = 0x84CB;
1237    pub const TEXTURE12: GLenum = 0x84CC;
1238    pub const TEXTURE13: GLenum = 0x84CD;
1239    pub const TEXTURE14: GLenum = 0x84CE;
1240    pub const TEXTURE15: GLenum = 0x84CF;
1241    pub const TEXTURE16: GLenum = 0x84D0;
1242    pub const TEXTURE17: GLenum = 0x84D1;
1243    pub const TEXTURE18: GLenum = 0x84D2;
1244    pub const TEXTURE19: GLenum = 0x84D3;
1245    pub const TEXTURE2: GLenum = 0x84C2;
1246    pub const TEXTURE20: GLenum = 0x84D4;
1247    pub const TEXTURE21: GLenum = 0x84D5;
1248    pub const TEXTURE22: GLenum = 0x84D6;
1249    pub const TEXTURE23: GLenum = 0x84D7;
1250    pub const TEXTURE24: GLenum = 0x84D8;
1251    pub const TEXTURE25: GLenum = 0x84D9;
1252    pub const TEXTURE26: GLenum = 0x84DA;
1253    pub const TEXTURE27: GLenum = 0x84DB;
1254    pub const TEXTURE28: GLenum = 0x84DC;
1255    pub const TEXTURE29: GLenum = 0x84DD;
1256    pub const TEXTURE3: GLenum = 0x84C3;
1257    pub const TEXTURE30: GLenum = 0x84DE;
1258    pub const TEXTURE31: GLenum = 0x84DF;
1259    pub const TEXTURE4: GLenum = 0x84C4;
1260    pub const TEXTURE5: GLenum = 0x84C5;
1261    pub const TEXTURE6: GLenum = 0x84C6;
1262    pub const TEXTURE7: GLenum = 0x84C7;
1263    pub const TEXTURE8: GLenum = 0x84C8;
1264    pub const TEXTURE9: GLenum = 0x84C9;
1265    pub const TEXTURE_1D: GLenum = 0x0DE0;
1266    pub const TEXTURE_1D_ARRAY: GLenum = 0x8C18;
1267    pub const TEXTURE_2D: GLenum = 0x0DE1;
1268    pub const TEXTURE_2D_ARRAY: GLenum = 0x8C1A;
1269    pub const TEXTURE_2D_MULTISAMPLE: GLenum = 0x9100;
1270    pub const TEXTURE_2D_MULTISAMPLE_ARRAY: GLenum = 0x9102;
1271    pub const TEXTURE_3D: GLenum = 0x806F;
1272    pub const TEXTURE_ALPHA_SIZE: GLenum = 0x805F;
1273    pub const TEXTURE_ALPHA_TYPE: GLenum = 0x8C13;
1274    pub const TEXTURE_BASE_LEVEL: GLenum = 0x813C;
1275    pub const TEXTURE_BINDING_1D: GLenum = 0x8068;
1276    pub const TEXTURE_BINDING_1D_ARRAY: GLenum = 0x8C1C;
1277    pub const TEXTURE_BINDING_2D: GLenum = 0x8069;
1278    pub const TEXTURE_BINDING_2D_ARRAY: GLenum = 0x8C1D;
1279    pub const TEXTURE_BINDING_2D_MULTISAMPLE: GLenum = 0x9104;
1280    pub const TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY: GLenum = 0x9105;
1281    pub const TEXTURE_BINDING_3D: GLenum = 0x806A;
1282    pub const TEXTURE_BINDING_BUFFER: GLenum = 0x8C2C;
1283    pub const TEXTURE_BINDING_CUBE_MAP: GLenum = 0x8514;
1284    pub const TEXTURE_BINDING_EXTERNAL_OES: GLenum = 0x8D67;
1285    pub const TEXTURE_BINDING_RECTANGLE: GLenum = 0x84F6;
1286    pub const TEXTURE_BINDING_RECTANGLE_ARB: GLenum = 0x84F6;
1287    pub const TEXTURE_BIT: GLenum = 0x00040000;
1288    pub const TEXTURE_BLUE_SIZE: GLenum = 0x805E;
1289    pub const TEXTURE_BLUE_TYPE: GLenum = 0x8C12;
1290    pub const TEXTURE_BORDER: GLenum = 0x1005;
1291    pub const TEXTURE_BORDER_COLOR: GLenum = 0x1004;
1292    pub const TEXTURE_BUFFER: GLenum = 0x8C2A;
1293    pub const TEXTURE_BUFFER_DATA_STORE_BINDING: GLenum = 0x8C2D;
1294    pub const TEXTURE_COMPARE_FUNC: GLenum = 0x884D;
1295    pub const TEXTURE_COMPARE_MODE: GLenum = 0x884C;
1296    pub const TEXTURE_COMPONENTS: GLenum = 0x1003;
1297    pub const TEXTURE_COMPRESSED: GLenum = 0x86A1;
1298    pub const TEXTURE_COMPRESSED_IMAGE_SIZE: GLenum = 0x86A0;
1299    pub const TEXTURE_COMPRESSION_HINT: GLenum = 0x84EF;
1300    pub const TEXTURE_COORD_ARRAY: GLenum = 0x8078;
1301    pub const TEXTURE_COORD_ARRAY_BUFFER_BINDING: GLenum = 0x889A;
1302    pub const TEXTURE_COORD_ARRAY_POINTER: GLenum = 0x8092;
1303    pub const TEXTURE_COORD_ARRAY_SIZE: GLenum = 0x8088;
1304    pub const TEXTURE_COORD_ARRAY_STRIDE: GLenum = 0x808A;
1305    pub const TEXTURE_COORD_ARRAY_TYPE: GLenum = 0x8089;
1306    pub const TEXTURE_CUBE_MAP: GLenum = 0x8513;
1307    pub const TEXTURE_CUBE_MAP_NEGATIVE_X: GLenum = 0x8516;
1308    pub const TEXTURE_CUBE_MAP_NEGATIVE_Y: GLenum = 0x8518;
1309    pub const TEXTURE_CUBE_MAP_NEGATIVE_Z: GLenum = 0x851A;
1310    pub const TEXTURE_CUBE_MAP_POSITIVE_X: GLenum = 0x8515;
1311    pub const TEXTURE_CUBE_MAP_POSITIVE_Y: GLenum = 0x8517;
1312    pub const TEXTURE_CUBE_MAP_POSITIVE_Z: GLenum = 0x8519;
1313    pub const TEXTURE_CUBE_MAP_SEAMLESS: GLenum = 0x884F;
1314    pub const TEXTURE_DEPTH: GLenum = 0x8071;
1315    pub const TEXTURE_DEPTH_SIZE: GLenum = 0x884A;
1316    pub const TEXTURE_DEPTH_TYPE: GLenum = 0x8C16;
1317    pub const TEXTURE_ENV: GLenum = 0x2300;
1318    pub const TEXTURE_ENV_COLOR: GLenum = 0x2201;
1319    pub const TEXTURE_ENV_MODE: GLenum = 0x2200;
1320    pub const TEXTURE_EXTERNAL_OES: GLenum = 0x8D65;
1321    pub const TEXTURE_FILTER_CONTROL: GLenum = 0x8500;
1322    pub const TEXTURE_FIXED_SAMPLE_LOCATIONS: GLenum = 0x9107;
1323    pub const TEXTURE_GEN_MODE: GLenum = 0x2500;
1324    pub const TEXTURE_GEN_Q: GLenum = 0x0C63;
1325    pub const TEXTURE_GEN_R: GLenum = 0x0C62;
1326    pub const TEXTURE_GEN_S: GLenum = 0x0C60;
1327    pub const TEXTURE_GEN_T: GLenum = 0x0C61;
1328    pub const TEXTURE_GREEN_SIZE: GLenum = 0x805D;
1329    pub const TEXTURE_GREEN_TYPE: GLenum = 0x8C11;
1330    pub const TEXTURE_HEIGHT: GLenum = 0x1001;
1331    pub const TEXTURE_IMMUTABLE_FORMAT: GLenum = 0x912F;
1332    pub const TEXTURE_IMMUTABLE_FORMAT_EXT: GLenum = 0x912F;
1333    pub const TEXTURE_IMMUTABLE_LEVELS: GLenum = 0x82DF;
1334    pub const TEXTURE_INTENSITY_SIZE: GLenum = 0x8061;
1335    pub const TEXTURE_INTENSITY_TYPE: GLenum = 0x8C15;
1336    pub const TEXTURE_INTERNAL_FORMAT: GLenum = 0x1003;
1337    pub const TEXTURE_LOD_BIAS: GLenum = 0x8501;
1338    pub const TEXTURE_LUMINANCE_SIZE: GLenum = 0x8060;
1339    pub const TEXTURE_LUMINANCE_TYPE: GLenum = 0x8C14;
1340    pub const TEXTURE_MAG_FILTER: GLenum = 0x2800;
1341    pub const TEXTURE_MATRIX: GLenum = 0x0BA8;
1342    pub const TEXTURE_MAX_ANISOTROPY_EXT: GLenum = 0x84FE;
1343    pub const TEXTURE_MAX_LEVEL: GLenum = 0x813D;
1344    pub const TEXTURE_MAX_LOD: GLenum = 0x813B;
1345    pub const TEXTURE_MIN_FILTER: GLenum = 0x2801;
1346    pub const TEXTURE_MIN_LOD: GLenum = 0x813A;
1347    pub const TEXTURE_PRIORITY: GLenum = 0x8066;
1348    pub const TEXTURE_RANGE_LENGTH_APPLE: GLenum = 0x85B7;
1349    pub const TEXTURE_RANGE_POINTER_APPLE: GLenum = 0x85B8;
1350    pub const TEXTURE_RECTANGLE: GLenum = 0x84F5;
1351    pub const TEXTURE_RECTANGLE_ARB: GLenum = 0x84F5;
1352    pub const TEXTURE_RED_SIZE: GLenum = 0x805C;
1353    pub const TEXTURE_RED_TYPE: GLenum = 0x8C10;
1354    pub const TEXTURE_RESIDENT: GLenum = 0x8067;
1355    pub const TEXTURE_SAMPLES: GLenum = 0x9106;
1356    pub const TEXTURE_SHARED_SIZE: GLenum = 0x8C3F;
1357    pub const TEXTURE_STACK_DEPTH: GLenum = 0x0BA5;
1358    pub const TEXTURE_STENCIL_SIZE: GLenum = 0x88F1;
1359    pub const TEXTURE_STORAGE_HINT_APPLE: GLenum = 0x85BC;
1360    pub const TEXTURE_SWIZZLE_A: GLenum = 0x8E45;
1361    pub const TEXTURE_SWIZZLE_B: GLenum = 0x8E44;
1362    pub const TEXTURE_SWIZZLE_G: GLenum = 0x8E43;
1363    pub const TEXTURE_SWIZZLE_R: GLenum = 0x8E42;
1364    pub const TEXTURE_SWIZZLE_RGBA: GLenum = 0x8E46;
1365    pub const TEXTURE_USAGE_ANGLE: GLenum = 0x93A2;
1366    pub const TEXTURE_WIDTH: GLenum = 0x1000;
1367    pub const TEXTURE_WRAP_R: GLenum = 0x8072;
1368    pub const TEXTURE_WRAP_S: GLenum = 0x2802;
1369    pub const TEXTURE_WRAP_T: GLenum = 0x2803;
1370    pub const TIMEOUT_EXPIRED: GLenum = 0x911B;
1371    pub const TIMEOUT_IGNORED: u64 = 0xFFFFFFFFFFFFFFFF;
1372    pub const TIMESTAMP: GLenum = 0x8E28;
1373    pub const TIMESTAMP_EXT: GLenum = 0x8E28;
1374    pub const TIME_ELAPSED: GLenum = 0x88BF;
1375    pub const TIME_ELAPSED_EXT: GLenum = 0x88BF;
1376    pub const TRANSFORM_BIT: GLenum = 0x00001000;
1377    pub const TRANSFORM_FEEDBACK: GLenum = 0x8E22;
1378    pub const TRANSFORM_FEEDBACK_ACTIVE: GLenum = 0x8E24;
1379    pub const TRANSFORM_FEEDBACK_BINDING: GLenum = 0x8E25;
1380    pub const TRANSFORM_FEEDBACK_BUFFER: GLenum = 0x8C8E;
1381    pub const TRANSFORM_FEEDBACK_BUFFER_BINDING: GLenum = 0x8C8F;
1382    pub const TRANSFORM_FEEDBACK_BUFFER_MODE: GLenum = 0x8C7F;
1383    pub const TRANSFORM_FEEDBACK_BUFFER_SIZE: GLenum = 0x8C85;
1384    pub const TRANSFORM_FEEDBACK_BUFFER_START: GLenum = 0x8C84;
1385    pub const TRANSFORM_FEEDBACK_PAUSED: GLenum = 0x8E23;
1386    pub const TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: GLenum = 0x8C88;
1387    pub const TRANSFORM_FEEDBACK_VARYINGS: GLenum = 0x8C83;
1388    pub const TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH: GLenum = 0x8C76;
1389    pub const TRANSPOSE_COLOR_MATRIX: GLenum = 0x84E6;
1390    pub const TRANSPOSE_MODELVIEW_MATRIX: GLenum = 0x84E3;
1391    pub const TRANSPOSE_PROJECTION_MATRIX: GLenum = 0x84E4;
1392    pub const TRANSPOSE_TEXTURE_MATRIX: GLenum = 0x84E5;
1393    pub const TRIANGLES: GLenum = 0x0004;
1394    pub const TRIANGLES_ADJACENCY: GLenum = 0x000C;
1395    pub const TRIANGLE_FAN: GLenum = 0x0006;
1396    pub const TRIANGLE_STRIP: GLenum = 0x0005;
1397    pub const TRIANGLE_STRIP_ADJACENCY: GLenum = 0x000D;
1398    pub const TRUE: GLenum = 1;
1399    pub const UNIFORM_ARRAY_STRIDE: GLenum = 0x8A3C;
1400    pub const UNIFORM_BLOCK_ACTIVE_UNIFORMS: GLenum = 0x8A42;
1401    pub const UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES: GLenum = 0x8A43;
1402    pub const UNIFORM_BLOCK_BINDING: GLenum = 0x8A3F;
1403    pub const UNIFORM_BLOCK_DATA_SIZE: GLenum = 0x8A40;
1404    pub const UNIFORM_BLOCK_INDEX: GLenum = 0x8A3A;
1405    pub const UNIFORM_BLOCK_NAME_LENGTH: GLenum = 0x8A41;
1406    pub const UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER: GLenum = 0x8A46;
1407    pub const UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER: GLenum = 0x8A45;
1408    pub const UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER: GLenum = 0x8A44;
1409    pub const UNIFORM_BUFFER: GLenum = 0x8A11;
1410    pub const UNIFORM_BUFFER_BINDING: GLenum = 0x8A28;
1411    pub const UNIFORM_BUFFER_OFFSET_ALIGNMENT: GLenum = 0x8A34;
1412    pub const UNIFORM_BUFFER_SIZE: GLenum = 0x8A2A;
1413    pub const UNIFORM_BUFFER_START: GLenum = 0x8A29;
1414    pub const UNIFORM_IS_ROW_MAJOR: GLenum = 0x8A3E;
1415    pub const UNIFORM_MATRIX_STRIDE: GLenum = 0x8A3D;
1416    pub const UNIFORM_NAME_LENGTH: GLenum = 0x8A39;
1417    pub const UNIFORM_OFFSET: GLenum = 0x8A3B;
1418    pub const UNIFORM_SIZE: GLenum = 0x8A38;
1419    pub const UNIFORM_TYPE: GLenum = 0x8A37;
1420    pub const UNPACK_ALIGNMENT: GLenum = 0x0CF5;
1421    pub const UNPACK_CLIENT_STORAGE_APPLE: GLenum = 0x85B2;
1422    pub const UNPACK_IMAGE_HEIGHT: GLenum = 0x806E;
1423    pub const UNPACK_LSB_FIRST: GLenum = 0x0CF1;
1424    pub const UNPACK_ROW_LENGTH: GLenum = 0x0CF2;
1425    pub const UNPACK_SKIP_IMAGES: GLenum = 0x806D;
1426    pub const UNPACK_SKIP_PIXELS: GLenum = 0x0CF4;
1427    pub const UNPACK_SKIP_ROWS: GLenum = 0x0CF3;
1428    pub const UNPACK_SWAP_BYTES: GLenum = 0x0CF0;
1429    pub const UNSIGNALED: GLenum = 0x9118;
1430    pub const UNSIGNED_BYTE: GLenum = 0x1401;
1431    pub const UNSIGNED_BYTE_2_3_3_REV: GLenum = 0x8362;
1432    pub const UNSIGNED_BYTE_3_3_2: GLenum = 0x8032;
1433    pub const UNSIGNED_INT: GLenum = 0x1405;
1434    pub const UNSIGNED_INT_10F_11F_11F_REV: GLenum = 0x8C3B;
1435    pub const UNSIGNED_INT_10_10_10_2: GLenum = 0x8036;
1436    pub const UNSIGNED_INT_24_8: GLenum = 0x84FA;
1437    pub const UNSIGNED_INT_2_10_10_10_REV: GLenum = 0x8368;
1438    pub const UNSIGNED_INT_5_9_9_9_REV: GLenum = 0x8C3E;
1439    pub const UNSIGNED_INT_8_8_8_8: GLenum = 0x8035;
1440    pub const UNSIGNED_INT_8_8_8_8_REV: GLenum = 0x8367;
1441    pub const UNSIGNED_INT_SAMPLER_1D: GLenum = 0x8DD1;
1442    pub const UNSIGNED_INT_SAMPLER_1D_ARRAY: GLenum = 0x8DD6;
1443    pub const UNSIGNED_INT_SAMPLER_2D: GLenum = 0x8DD2;
1444    pub const UNSIGNED_INT_SAMPLER_2D_ARRAY: GLenum = 0x8DD7;
1445    pub const UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE: GLenum = 0x910A;
1446    pub const UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY: GLenum = 0x910D;
1447    pub const UNSIGNED_INT_SAMPLER_2D_RECT: GLenum = 0x8DD5;
1448    pub const UNSIGNED_INT_SAMPLER_3D: GLenum = 0x8DD3;
1449    pub const UNSIGNED_INT_SAMPLER_BUFFER: GLenum = 0x8DD8;
1450    pub const UNSIGNED_INT_SAMPLER_CUBE: GLenum = 0x8DD4;
1451    pub const UNSIGNED_INT_VEC2: GLenum = 0x8DC6;
1452    pub const UNSIGNED_INT_VEC3: GLenum = 0x8DC7;
1453    pub const UNSIGNED_INT_VEC4: GLenum = 0x8DC8;
1454    pub const UNSIGNED_NORMALIZED: GLenum = 0x8C17;
1455    pub const UNSIGNED_SHORT: GLenum = 0x1403;
1456    pub const UNSIGNED_SHORT_1_5_5_5_REV: GLenum = 0x8366;
1457    pub const UNSIGNED_SHORT_4_4_4_4: GLenum = 0x8033;
1458    pub const UNSIGNED_SHORT_4_4_4_4_REV: GLenum = 0x8365;
1459    pub const UNSIGNED_SHORT_5_5_5_1: GLenum = 0x8034;
1460    pub const UNSIGNED_SHORT_5_6_5: GLenum = 0x8363;
1461    pub const UNSIGNED_SHORT_5_6_5_REV: GLenum = 0x8364;
1462    pub const UPPER_LEFT: GLenum = 0x8CA2;
1463    pub const V2F: GLenum = 0x2A20;
1464    pub const V3F: GLenum = 0x2A21;
1465    pub const VALIDATE_STATUS: GLenum = 0x8B83;
1466    pub const VENDOR: GLenum = 0x1F00;
1467    pub const VERSION: GLenum = 0x1F02;
1468    pub const VERTEX_ARRAY: GLenum = 0x8074;
1469    pub const VERTEX_ARRAY_BINDING: GLenum = 0x85B5;
1470    pub const VERTEX_ARRAY_BINDING_APPLE: GLenum = 0x85B5;
1471    pub const VERTEX_ARRAY_BUFFER_BINDING: GLenum = 0x8896;
1472    pub const VERTEX_ARRAY_KHR: GLenum = 0x8074;
1473    pub const VERTEX_ARRAY_POINTER: GLenum = 0x808E;
1474    pub const VERTEX_ARRAY_SIZE: GLenum = 0x807A;
1475    pub const VERTEX_ARRAY_STRIDE: GLenum = 0x807C;
1476    pub const VERTEX_ARRAY_TYPE: GLenum = 0x807B;
1477    pub const VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: GLenum = 0x889F;
1478    pub const VERTEX_ATTRIB_ARRAY_DIVISOR: GLenum = 0x88FE;
1479    pub const VERTEX_ATTRIB_ARRAY_ENABLED: GLenum = 0x8622;
1480    pub const VERTEX_ATTRIB_ARRAY_INTEGER: GLenum = 0x88FD;
1481    pub const VERTEX_ATTRIB_ARRAY_NORMALIZED: GLenum = 0x886A;
1482    pub const VERTEX_ATTRIB_ARRAY_POINTER: GLenum = 0x8645;
1483    pub const VERTEX_ATTRIB_ARRAY_SIZE: GLenum = 0x8623;
1484    pub const VERTEX_ATTRIB_ARRAY_STRIDE: GLenum = 0x8624;
1485    pub const VERTEX_ATTRIB_ARRAY_TYPE: GLenum = 0x8625;
1486    pub const VERTEX_PROGRAM_POINT_SIZE: GLenum = 0x8642;
1487    pub const VERTEX_PROGRAM_TWO_SIDE: GLenum = 0x8643;
1488    pub const VERTEX_SHADER: GLenum = 0x8B31;
1489    pub const VIEWPORT: GLenum = 0x0BA2;
1490    pub const VIEWPORT_BIT: GLenum = 0x00000800;
1491    pub const WAIT_FAILED: GLenum = 0x911D;
1492    pub const WEIGHT_ARRAY_BUFFER_BINDING: GLenum = 0x889E;
1493    pub const WRITE_ONLY: GLenum = 0x88B9;
1494    pub const XOR: GLenum = 0x1506;
1495    pub const ZERO: GLenum = 0;
1496    pub const ZOOM_X: GLenum = 0x0D16;
1497    pub const ZOOM_Y: GLenum = 0x0D17;
1498}
1499
1500pub use self::ctypes::*;
1501
1502/// Typedef for an OpenGL handle
1503pub type GLuint = u32;
1504pub type GLint = i32;
1505pub type GLint64 = i64;
1506pub type GLuint64 = u64;
1507pub type GLenum = u32;
1508pub type GLintptr = isize;
1509pub type GLboolean = u8;
1510pub type GLsizeiptr = isize;
1511pub type GLvoid = core::ffi::c_void;
1512pub type GLbitfield = u32;
1513pub type GLsizei = i32;
1514pub type GLclampf = f32;
1515pub type GLfloat = f32;
1516pub type GLchar = c_char; // = c_char
1517pub type GLclampd = f64;
1518pub type GLubyte = c_uchar;
1519
1520#[cfg(feature = "gleam_trait")]
1521pub type GLeglImageOES = gleam::gl::GLeglImageOES; // *const c_void;
1522#[cfg(not(feature = "gleam_trait"))]
1523pub type GLeglImageOES = *const c_void;
1524
1525#[cfg(feature = "gleam_trait")]
1526pub type GLsync = gleam::gl::GLsync;
1527#[cfg(not(feature = "gleam_trait"))]
1528pub type GLsync = *const c_void;
1529
1530#[cfg(feature = "gleam_trait")]
1531pub use gleam::gl::DebugMessage;
1532
1533#[cfg(not(feature = "gleam_trait"))]
1534#[repr(C)]
1535pub struct DebugMessage {
1536    pub message: String,
1537    pub source: GLenum,
1538    pub ty: GLenum,
1539    pub id: GLenum,
1540    pub severity: GLenum,
1541}
1542
1543#[cfg(feature = "gleam_trait")]
1544pub use gleam::gl::GlType;
1545
1546#[cfg(not(feature = "gleam_trait"))]
1547#[repr(C)]
1548#[derive(Copy, Clone)]
1549pub enum GlType {
1550    Gl,
1551    GlEs,
1552}
1553
1554pub struct GenericGlContext {
1555    pub glAccum: *mut c_void,
1556    pub glActiveTexture: *mut c_void,
1557    pub glAlphaFunc: *mut c_void,
1558    pub glAreTexturesResident: *mut c_void,
1559    pub glArrayElement: *mut c_void,
1560    pub glAttachShader: *mut c_void,
1561    pub glBegin: *mut c_void,
1562    pub glBeginConditionalRender: *mut c_void,
1563    pub glBeginQuery: *mut c_void,
1564    pub glBeginTransformFeedback: *mut c_void,
1565    pub glBindAttribLocation: *mut c_void,
1566    pub glBindBuffer: *mut c_void,
1567    pub glBindBufferBase: *mut c_void,
1568    pub glBindBufferRange: *mut c_void,
1569    pub glBindFragDataLocation: *mut c_void,
1570    pub glBindFragDataLocationIndexed: *mut c_void,
1571    pub glBindFramebuffer: *mut c_void,
1572    pub glBindRenderbuffer: *mut c_void,
1573    pub glBindSampler: *mut c_void,
1574    pub glBindTexture: *mut c_void,
1575    pub glBindVertexArray: *mut c_void,
1576    pub glBindVertexArrayAPPLE: *mut c_void,
1577    pub glBitmap: *mut c_void,
1578    pub glBlendBarrierKHR: *mut c_void,
1579    pub glBlendColor: *mut c_void,
1580    pub glBlendEquation: *mut c_void,
1581    pub glBlendEquationSeparate: *mut c_void,
1582    pub glBlendFunc: *mut c_void,
1583    pub glBlendFuncSeparate: *mut c_void,
1584    pub glBlitFramebuffer: *mut c_void,
1585    pub glBufferData: *mut c_void,
1586    pub glBufferStorage: *mut c_void,
1587    pub glBufferSubData: *mut c_void,
1588    pub glCallList: *mut c_void,
1589    pub glCallLists: *mut c_void,
1590    pub glCheckFramebufferStatus: *mut c_void,
1591    pub glClampColor: *mut c_void,
1592    pub glClear: *mut c_void,
1593    pub glClearAccum: *mut c_void,
1594    pub glClearBufferfi: *mut c_void,
1595    pub glClearBufferfv: *mut c_void,
1596    pub glClearBufferiv: *mut c_void,
1597    pub glClearBufferuiv: *mut c_void,
1598    pub glClearColor: *mut c_void,
1599    pub glClearDepth: *mut c_void,
1600    pub glClearIndex: *mut c_void,
1601    pub glClearStencil: *mut c_void,
1602    pub glClientActiveTexture: *mut c_void,
1603    pub glClientWaitSync: *mut c_void,
1604    pub glClipPlane: *mut c_void,
1605    pub glColor3b: *mut c_void,
1606    pub glColor3bv: *mut c_void,
1607    pub glColor3d: *mut c_void,
1608    pub glColor3dv: *mut c_void,
1609    pub glColor3f: *mut c_void,
1610    pub glColor3fv: *mut c_void,
1611    pub glColor3i: *mut c_void,
1612    pub glColor3iv: *mut c_void,
1613    pub glColor3s: *mut c_void,
1614    pub glColor3sv: *mut c_void,
1615    pub glColor3ub: *mut c_void,
1616    pub glColor3ubv: *mut c_void,
1617    pub glColor3ui: *mut c_void,
1618    pub glColor3uiv: *mut c_void,
1619    pub glColor3us: *mut c_void,
1620    pub glColor3usv: *mut c_void,
1621    pub glColor4b: *mut c_void,
1622    pub glColor4bv: *mut c_void,
1623    pub glColor4d: *mut c_void,
1624    pub glColor4dv: *mut c_void,
1625    pub glColor4f: *mut c_void,
1626    pub glColor4fv: *mut c_void,
1627    pub glColor4i: *mut c_void,
1628    pub glColor4iv: *mut c_void,
1629    pub glColor4s: *mut c_void,
1630    pub glColor4sv: *mut c_void,
1631    pub glColor4ub: *mut c_void,
1632    pub glColor4ubv: *mut c_void,
1633    pub glColor4ui: *mut c_void,
1634    pub glColor4uiv: *mut c_void,
1635    pub glColor4us: *mut c_void,
1636    pub glColor4usv: *mut c_void,
1637    pub glColorMask: *mut c_void,
1638    pub glColorMaski: *mut c_void,
1639    pub glColorMaterial: *mut c_void,
1640    pub glColorP3ui: *mut c_void,
1641    pub glColorP3uiv: *mut c_void,
1642    pub glColorP4ui: *mut c_void,
1643    pub glColorP4uiv: *mut c_void,
1644    pub glColorPointer: *mut c_void,
1645    pub glCompileShader: *mut c_void,
1646    pub glCompressedTexImage1D: *mut c_void,
1647    pub glCompressedTexImage2D: *mut c_void,
1648    pub glCompressedTexImage3D: *mut c_void,
1649    pub glCompressedTexSubImage1D: *mut c_void,
1650    pub glCompressedTexSubImage2D: *mut c_void,
1651    pub glCompressedTexSubImage3D: *mut c_void,
1652    pub glCopyBufferSubData: *mut c_void,
1653    pub glCopyImageSubData: *mut c_void,
1654    pub glCopyPixels: *mut c_void,
1655    pub glCopyTexImage1D: *mut c_void,
1656    pub glCopyTexImage2D: *mut c_void,
1657    pub glCopyTexSubImage1D: *mut c_void,
1658    pub glCopyTexSubImage2D: *mut c_void,
1659    pub glCopyTexSubImage3D: *mut c_void,
1660    pub glCreateProgram: *mut c_void,
1661    pub glCreateShader: *mut c_void,
1662    pub glCullFace: *mut c_void,
1663    pub glDebugMessageCallback: *mut c_void,
1664    pub glDebugMessageCallbackKHR: *mut c_void,
1665    pub glDebugMessageControl: *mut c_void,
1666    pub glDebugMessageControlKHR: *mut c_void,
1667    pub glDebugMessageInsert: *mut c_void,
1668    pub glDebugMessageInsertKHR: *mut c_void,
1669    pub glDeleteBuffers: *mut c_void,
1670    pub glDeleteFencesAPPLE: *mut c_void,
1671    pub glDeleteFramebuffers: *mut c_void,
1672    pub glDeleteLists: *mut c_void,
1673    pub glDeleteProgram: *mut c_void,
1674    pub glDeleteQueries: *mut c_void,
1675    pub glDeleteRenderbuffers: *mut c_void,
1676    pub glDeleteSamplers: *mut c_void,
1677    pub glDeleteShader: *mut c_void,
1678    pub glDeleteSync: *mut c_void,
1679    pub glDeleteTextures: *mut c_void,
1680    pub glDeleteVertexArrays: *mut c_void,
1681    pub glDeleteVertexArraysAPPLE: *mut c_void,
1682    pub glDepthFunc: *mut c_void,
1683    pub glDepthMask: *mut c_void,
1684    pub glDepthRange: *mut c_void,
1685    pub glDetachShader: *mut c_void,
1686    pub glDisable: *mut c_void,
1687    pub glDisableClientState: *mut c_void,
1688    pub glDisableVertexAttribArray: *mut c_void,
1689    pub glDisablei: *mut c_void,
1690    pub glDrawArrays: *mut c_void,
1691    pub glDrawArraysInstanced: *mut c_void,
1692    pub glDrawBuffer: *mut c_void,
1693    pub glDrawBuffers: *mut c_void,
1694    pub glDrawElements: *mut c_void,
1695    pub glDrawElementsBaseVertex: *mut c_void,
1696    pub glDrawElementsInstanced: *mut c_void,
1697    pub glDrawElementsInstancedBaseVertex: *mut c_void,
1698    pub glDrawPixels: *mut c_void,
1699    pub glDrawRangeElements: *mut c_void,
1700    pub glDrawRangeElementsBaseVertex: *mut c_void,
1701    pub glEdgeFlag: *mut c_void,
1702    pub glEdgeFlagPointer: *mut c_void,
1703    pub glEdgeFlagv: *mut c_void,
1704    pub glEnable: *mut c_void,
1705    pub glEnableClientState: *mut c_void,
1706    pub glEnableVertexAttribArray: *mut c_void,
1707    pub glEnablei: *mut c_void,
1708    pub glEnd: *mut c_void,
1709    pub glEndConditionalRender: *mut c_void,
1710    pub glEndList: *mut c_void,
1711    pub glEndQuery: *mut c_void,
1712    pub glEndTransformFeedback: *mut c_void,
1713    pub glEvalCoord1d: *mut c_void,
1714    pub glEvalCoord1dv: *mut c_void,
1715    pub glEvalCoord1f: *mut c_void,
1716    pub glEvalCoord1fv: *mut c_void,
1717    pub glEvalCoord2d: *mut c_void,
1718    pub glEvalCoord2dv: *mut c_void,
1719    pub glEvalCoord2f: *mut c_void,
1720    pub glEvalCoord2fv: *mut c_void,
1721    pub glEvalMesh1: *mut c_void,
1722    pub glEvalMesh2: *mut c_void,
1723    pub glEvalPoint1: *mut c_void,
1724    pub glEvalPoint2: *mut c_void,
1725    pub glFeedbackBuffer: *mut c_void,
1726    pub glFenceSync: *mut c_void,
1727    pub glFinish: *mut c_void,
1728    pub glFinishFenceAPPLE: *mut c_void,
1729    pub glFinishObjectAPPLE: *mut c_void,
1730    pub glFlush: *mut c_void,
1731    pub glFlushMappedBufferRange: *mut c_void,
1732    pub glFogCoordPointer: *mut c_void,
1733    pub glFogCoordd: *mut c_void,
1734    pub glFogCoorddv: *mut c_void,
1735    pub glFogCoordf: *mut c_void,
1736    pub glFogCoordfv: *mut c_void,
1737    pub glFogf: *mut c_void,
1738    pub glFogfv: *mut c_void,
1739    pub glFogi: *mut c_void,
1740    pub glFogiv: *mut c_void,
1741    pub glFramebufferRenderbuffer: *mut c_void,
1742    pub glFramebufferTexture: *mut c_void,
1743    pub glFramebufferTexture1D: *mut c_void,
1744    pub glFramebufferTexture2D: *mut c_void,
1745    pub glFramebufferTexture3D: *mut c_void,
1746    pub glFramebufferTextureLayer: *mut c_void,
1747    pub glFrontFace: *mut c_void,
1748    pub glFrustum: *mut c_void,
1749    pub glGenBuffers: *mut c_void,
1750    pub glGenFencesAPPLE: *mut c_void,
1751    pub glGenFramebuffers: *mut c_void,
1752    pub glGenLists: *mut c_void,
1753    pub glGenQueries: *mut c_void,
1754    pub glGenRenderbuffers: *mut c_void,
1755    pub glGenSamplers: *mut c_void,
1756    pub glGenTextures: *mut c_void,
1757    pub glGenVertexArrays: *mut c_void,
1758    pub glGenVertexArraysAPPLE: *mut c_void,
1759    pub glGenerateMipmap: *mut c_void,
1760    pub glGetActiveAttrib: *mut c_void,
1761    pub glGetActiveUniform: *mut c_void,
1762    pub glGetActiveUniformBlockName: *mut c_void,
1763    pub glGetActiveUniformBlockiv: *mut c_void,
1764    pub glGetActiveUniformName: *mut c_void,
1765    pub glGetActiveUniformsiv: *mut c_void,
1766    pub glGetAttachedShaders: *mut c_void,
1767    pub glGetAttribLocation: *mut c_void,
1768    pub glGetBooleani_v: *mut c_void,
1769    pub glGetBooleanv: *mut c_void,
1770    pub glGetBufferParameteri64v: *mut c_void,
1771    pub glGetBufferParameteriv: *mut c_void,
1772    pub glGetBufferPointerv: *mut c_void,
1773    pub glGetBufferSubData: *mut c_void,
1774    pub glGetClipPlane: *mut c_void,
1775    pub glGetCompressedTexImage: *mut c_void,
1776    pub glGetDebugMessageLog: *mut c_void,
1777    pub glGetDebugMessageLogKHR: *mut c_void,
1778    pub glGetDoublev: *mut c_void,
1779    pub glGetError: *mut c_void,
1780    pub glGetFloatv: *mut c_void,
1781    pub glGetFragDataIndex: *mut c_void,
1782    pub glGetFragDataLocation: *mut c_void,
1783    pub glGetFramebufferAttachmentParameteriv: *mut c_void,
1784    pub glGetInteger64i_v: *mut c_void,
1785    pub glGetInteger64v: *mut c_void,
1786    pub glGetIntegeri_v: *mut c_void,
1787    pub glGetIntegerv: *mut c_void,
1788    pub glGetLightfv: *mut c_void,
1789    pub glGetLightiv: *mut c_void,
1790    pub glGetMapdv: *mut c_void,
1791    pub glGetMapfv: *mut c_void,
1792    pub glGetMapiv: *mut c_void,
1793    pub glGetMaterialfv: *mut c_void,
1794    pub glGetMaterialiv: *mut c_void,
1795    pub glGetMultisamplefv: *mut c_void,
1796    pub glGetObjectLabel: *mut c_void,
1797    pub glGetObjectLabelKHR: *mut c_void,
1798    pub glGetObjectPtrLabel: *mut c_void,
1799    pub glGetObjectPtrLabelKHR: *mut c_void,
1800    pub glGetPixelMapfv: *mut c_void,
1801    pub glGetPixelMapuiv: *mut c_void,
1802    pub glGetPixelMapusv: *mut c_void,
1803    pub glGetPointerv: *mut c_void,
1804    pub glGetPointervKHR: *mut c_void,
1805    pub glGetPolygonStipple: *mut c_void,
1806    pub glGetProgramBinary: *mut c_void,
1807    pub glGetProgramInfoLog: *mut c_void,
1808    pub glGetProgramiv: *mut c_void,
1809    pub glGetQueryObjecti64v: *mut c_void,
1810    pub glGetQueryObjectiv: *mut c_void,
1811    pub glGetQueryObjectui64v: *mut c_void,
1812    pub glGetQueryObjectuiv: *mut c_void,
1813    pub glGetQueryiv: *mut c_void,
1814    pub glGetRenderbufferParameteriv: *mut c_void,
1815    pub glGetSamplerParameterIiv: *mut c_void,
1816    pub glGetSamplerParameterIuiv: *mut c_void,
1817    pub glGetSamplerParameterfv: *mut c_void,
1818    pub glGetSamplerParameteriv: *mut c_void,
1819    pub glGetShaderInfoLog: *mut c_void,
1820    pub glGetShaderSource: *mut c_void,
1821    pub glGetShaderiv: *mut c_void,
1822    pub glGetString: *mut c_void,
1823    pub glGetStringi: *mut c_void,
1824    pub glGetSynciv: *mut c_void,
1825    pub glGetTexEnvfv: *mut c_void,
1826    pub glGetTexEnviv: *mut c_void,
1827    pub glGetTexGendv: *mut c_void,
1828    pub glGetTexGenfv: *mut c_void,
1829    pub glGetTexGeniv: *mut c_void,
1830    pub glGetTexImage: *mut c_void,
1831    pub glGetTexLevelParameterfv: *mut c_void,
1832    pub glGetTexLevelParameteriv: *mut c_void,
1833    pub glGetTexParameterIiv: *mut c_void,
1834    pub glGetTexParameterIuiv: *mut c_void,
1835    pub glGetTexParameterPointervAPPLE: *mut c_void,
1836    pub glGetTexParameterfv: *mut c_void,
1837    pub glGetTexParameteriv: *mut c_void,
1838    pub glGetTransformFeedbackVarying: *mut c_void,
1839    pub glGetUniformBlockIndex: *mut c_void,
1840    pub glGetUniformIndices: *mut c_void,
1841    pub glGetUniformLocation: *mut c_void,
1842    pub glGetUniformfv: *mut c_void,
1843    pub glGetUniformiv: *mut c_void,
1844    pub glGetUniformuiv: *mut c_void,
1845    pub glGetVertexAttribIiv: *mut c_void,
1846    pub glGetVertexAttribIuiv: *mut c_void,
1847    pub glGetVertexAttribPointerv: *mut c_void,
1848    pub glGetVertexAttribdv: *mut c_void,
1849    pub glGetVertexAttribfv: *mut c_void,
1850    pub glGetVertexAttribiv: *mut c_void,
1851    pub glHint: *mut c_void,
1852    pub glIndexMask: *mut c_void,
1853    pub glIndexPointer: *mut c_void,
1854    pub glIndexd: *mut c_void,
1855    pub glIndexdv: *mut c_void,
1856    pub glIndexf: *mut c_void,
1857    pub glIndexfv: *mut c_void,
1858    pub glIndexi: *mut c_void,
1859    pub glIndexiv: *mut c_void,
1860    pub glIndexs: *mut c_void,
1861    pub glIndexsv: *mut c_void,
1862    pub glIndexub: *mut c_void,
1863    pub glIndexubv: *mut c_void,
1864    pub glInitNames: *mut c_void,
1865    pub glInsertEventMarkerEXT: *mut c_void,
1866    pub glInterleavedArrays: *mut c_void,
1867    pub glInvalidateBufferData: *mut c_void,
1868    pub glInvalidateBufferSubData: *mut c_void,
1869    pub glInvalidateFramebuffer: *mut c_void,
1870    pub glInvalidateSubFramebuffer: *mut c_void,
1871    pub glInvalidateTexImage: *mut c_void,
1872    pub glInvalidateTexSubImage: *mut c_void,
1873    pub glIsBuffer: *mut c_void,
1874    pub glIsEnabled: *mut c_void,
1875    pub glIsEnabledi: *mut c_void,
1876    pub glIsFenceAPPLE: *mut c_void,
1877    pub glIsFramebuffer: *mut c_void,
1878    pub glIsList: *mut c_void,
1879    pub glIsProgram: *mut c_void,
1880    pub glIsQuery: *mut c_void,
1881    pub glIsRenderbuffer: *mut c_void,
1882    pub glIsSampler: *mut c_void,
1883    pub glIsShader: *mut c_void,
1884    pub glIsSync: *mut c_void,
1885    pub glIsTexture: *mut c_void,
1886    pub glIsVertexArray: *mut c_void,
1887    pub glIsVertexArrayAPPLE: *mut c_void,
1888    pub glLightModelf: *mut c_void,
1889    pub glLightModelfv: *mut c_void,
1890    pub glLightModeli: *mut c_void,
1891    pub glLightModeliv: *mut c_void,
1892    pub glLightf: *mut c_void,
1893    pub glLightfv: *mut c_void,
1894    pub glLighti: *mut c_void,
1895    pub glLightiv: *mut c_void,
1896    pub glLineStipple: *mut c_void,
1897    pub glLineWidth: *mut c_void,
1898    pub glLinkProgram: *mut c_void,
1899    pub glListBase: *mut c_void,
1900    pub glLoadIdentity: *mut c_void,
1901    pub glLoadMatrixd: *mut c_void,
1902    pub glLoadMatrixf: *mut c_void,
1903    pub glLoadName: *mut c_void,
1904    pub glLoadTransposeMatrixd: *mut c_void,
1905    pub glLoadTransposeMatrixf: *mut c_void,
1906    pub glLogicOp: *mut c_void,
1907    pub glMap1d: *mut c_void,
1908    pub glMap1f: *mut c_void,
1909    pub glMap2d: *mut c_void,
1910    pub glMap2f: *mut c_void,
1911    pub glMapBuffer: *mut c_void,
1912    pub glMapBufferRange: *mut c_void,
1913    pub glMapGrid1d: *mut c_void,
1914    pub glMapGrid1f: *mut c_void,
1915    pub glMapGrid2d: *mut c_void,
1916    pub glMapGrid2f: *mut c_void,
1917    pub glMaterialf: *mut c_void,
1918    pub glMaterialfv: *mut c_void,
1919    pub glMateriali: *mut c_void,
1920    pub glMaterialiv: *mut c_void,
1921    pub glMatrixMode: *mut c_void,
1922    pub glMultMatrixd: *mut c_void,
1923    pub glMultMatrixf: *mut c_void,
1924    pub glMultTransposeMatrixd: *mut c_void,
1925    pub glMultTransposeMatrixf: *mut c_void,
1926    pub glMultiDrawArrays: *mut c_void,
1927    pub glMultiDrawElements: *mut c_void,
1928    pub glMultiDrawElementsBaseVertex: *mut c_void,
1929    pub glMultiTexCoord1d: *mut c_void,
1930    pub glMultiTexCoord1dv: *mut c_void,
1931    pub glMultiTexCoord1f: *mut c_void,
1932    pub glMultiTexCoord1fv: *mut c_void,
1933    pub glMultiTexCoord1i: *mut c_void,
1934    pub glMultiTexCoord1iv: *mut c_void,
1935    pub glMultiTexCoord1s: *mut c_void,
1936    pub glMultiTexCoord1sv: *mut c_void,
1937    pub glMultiTexCoord2d: *mut c_void,
1938    pub glMultiTexCoord2dv: *mut c_void,
1939    pub glMultiTexCoord2f: *mut c_void,
1940    pub glMultiTexCoord2fv: *mut c_void,
1941    pub glMultiTexCoord2i: *mut c_void,
1942    pub glMultiTexCoord2iv: *mut c_void,
1943    pub glMultiTexCoord2s: *mut c_void,
1944    pub glMultiTexCoord2sv: *mut c_void,
1945    pub glMultiTexCoord3d: *mut c_void,
1946    pub glMultiTexCoord3dv: *mut c_void,
1947    pub glMultiTexCoord3f: *mut c_void,
1948    pub glMultiTexCoord3fv: *mut c_void,
1949    pub glMultiTexCoord3i: *mut c_void,
1950    pub glMultiTexCoord3iv: *mut c_void,
1951    pub glMultiTexCoord3s: *mut c_void,
1952    pub glMultiTexCoord3sv: *mut c_void,
1953    pub glMultiTexCoord4d: *mut c_void,
1954    pub glMultiTexCoord4dv: *mut c_void,
1955    pub glMultiTexCoord4f: *mut c_void,
1956    pub glMultiTexCoord4fv: *mut c_void,
1957    pub glMultiTexCoord4i: *mut c_void,
1958    pub glMultiTexCoord4iv: *mut c_void,
1959    pub glMultiTexCoord4s: *mut c_void,
1960    pub glMultiTexCoord4sv: *mut c_void,
1961    pub glMultiTexCoordP1ui: *mut c_void,
1962    pub glMultiTexCoordP1uiv: *mut c_void,
1963    pub glMultiTexCoordP2ui: *mut c_void,
1964    pub glMultiTexCoordP2uiv: *mut c_void,
1965    pub glMultiTexCoordP3ui: *mut c_void,
1966    pub glMultiTexCoordP3uiv: *mut c_void,
1967    pub glMultiTexCoordP4ui: *mut c_void,
1968    pub glMultiTexCoordP4uiv: *mut c_void,
1969    pub glNewList: *mut c_void,
1970    pub glNormal3b: *mut c_void,
1971    pub glNormal3bv: *mut c_void,
1972    pub glNormal3d: *mut c_void,
1973    pub glNormal3dv: *mut c_void,
1974    pub glNormal3f: *mut c_void,
1975    pub glNormal3fv: *mut c_void,
1976    pub glNormal3i: *mut c_void,
1977    pub glNormal3iv: *mut c_void,
1978    pub glNormal3s: *mut c_void,
1979    pub glNormal3sv: *mut c_void,
1980    pub glNormalP3ui: *mut c_void,
1981    pub glNormalP3uiv: *mut c_void,
1982    pub glNormalPointer: *mut c_void,
1983    pub glObjectLabel: *mut c_void,
1984    pub glObjectLabelKHR: *mut c_void,
1985    pub glObjectPtrLabel: *mut c_void,
1986    pub glObjectPtrLabelKHR: *mut c_void,
1987    pub glOrtho: *mut c_void,
1988    pub glPassThrough: *mut c_void,
1989    pub glPixelMapfv: *mut c_void,
1990    pub glPixelMapuiv: *mut c_void,
1991    pub glPixelMapusv: *mut c_void,
1992    pub glPixelStoref: *mut c_void,
1993    pub glPixelStorei: *mut c_void,
1994    pub glPixelTransferf: *mut c_void,
1995    pub glPixelTransferi: *mut c_void,
1996    pub glPixelZoom: *mut c_void,
1997    pub glPointParameterf: *mut c_void,
1998    pub glPointParameterfv: *mut c_void,
1999    pub glPointParameteri: *mut c_void,
2000    pub glPointParameteriv: *mut c_void,
2001    pub glPointSize: *mut c_void,
2002    pub glPolygonMode: *mut c_void,
2003    pub glPolygonOffset: *mut c_void,
2004    pub glPolygonStipple: *mut c_void,
2005    pub glPopAttrib: *mut c_void,
2006    pub glPopClientAttrib: *mut c_void,
2007    pub glPopDebugGroup: *mut c_void,
2008    pub glPopDebugGroupKHR: *mut c_void,
2009    pub glPopGroupMarkerEXT: *mut c_void,
2010    pub glPopMatrix: *mut c_void,
2011    pub glPopName: *mut c_void,
2012    pub glPrimitiveRestartIndex: *mut c_void,
2013    pub glPrioritizeTextures: *mut c_void,
2014    pub glProgramBinary: *mut c_void,
2015    pub glProgramParameteri: *mut c_void,
2016    pub glProvokingVertex: *mut c_void,
2017    pub glPushAttrib: *mut c_void,
2018    pub glPushClientAttrib: *mut c_void,
2019    pub glPushDebugGroup: *mut c_void,
2020    pub glPushDebugGroupKHR: *mut c_void,
2021    pub glPushGroupMarkerEXT: *mut c_void,
2022    pub glPushMatrix: *mut c_void,
2023    pub glPushName: *mut c_void,
2024    pub glQueryCounter: *mut c_void,
2025    pub glRasterPos2d: *mut c_void,
2026    pub glRasterPos2dv: *mut c_void,
2027    pub glRasterPos2f: *mut c_void,
2028    pub glRasterPos2fv: *mut c_void,
2029    pub glRasterPos2i: *mut c_void,
2030    pub glRasterPos2iv: *mut c_void,
2031    pub glRasterPos2s: *mut c_void,
2032    pub glRasterPos2sv: *mut c_void,
2033    pub glRasterPos3d: *mut c_void,
2034    pub glRasterPos3dv: *mut c_void,
2035    pub glRasterPos3f: *mut c_void,
2036    pub glRasterPos3fv: *mut c_void,
2037    pub glRasterPos3i: *mut c_void,
2038    pub glRasterPos3iv: *mut c_void,
2039    pub glRasterPos3s: *mut c_void,
2040    pub glRasterPos3sv: *mut c_void,
2041    pub glRasterPos4d: *mut c_void,
2042    pub glRasterPos4dv: *mut c_void,
2043    pub glRasterPos4f: *mut c_void,
2044    pub glRasterPos4fv: *mut c_void,
2045    pub glRasterPos4i: *mut c_void,
2046    pub glRasterPos4iv: *mut c_void,
2047    pub glRasterPos4s: *mut c_void,
2048    pub glRasterPos4sv: *mut c_void,
2049    pub glReadBuffer: *mut c_void,
2050    pub glReadPixels: *mut c_void,
2051    pub glRectd: *mut c_void,
2052    pub glRectdv: *mut c_void,
2053    pub glRectf: *mut c_void,
2054    pub glRectfv: *mut c_void,
2055    pub glRecti: *mut c_void,
2056    pub glRectiv: *mut c_void,
2057    pub glRects: *mut c_void,
2058    pub glRectsv: *mut c_void,
2059    pub glRenderMode: *mut c_void,
2060    pub glRenderbufferStorage: *mut c_void,
2061    pub glRenderbufferStorageMultisample: *mut c_void,
2062    pub glRotated: *mut c_void,
2063    pub glRotatef: *mut c_void,
2064    pub glSampleCoverage: *mut c_void,
2065    pub glSampleMaski: *mut c_void,
2066    pub glSamplerParameterIiv: *mut c_void,
2067    pub glSamplerParameterIuiv: *mut c_void,
2068    pub glSamplerParameterf: *mut c_void,
2069    pub glSamplerParameterfv: *mut c_void,
2070    pub glSamplerParameteri: *mut c_void,
2071    pub glSamplerParameteriv: *mut c_void,
2072    pub glScaled: *mut c_void,
2073    pub glScalef: *mut c_void,
2074    pub glScissor: *mut c_void,
2075    pub glSecondaryColor3b: *mut c_void,
2076    pub glSecondaryColor3bv: *mut c_void,
2077    pub glSecondaryColor3d: *mut c_void,
2078    pub glSecondaryColor3dv: *mut c_void,
2079    pub glSecondaryColor3f: *mut c_void,
2080    pub glSecondaryColor3fv: *mut c_void,
2081    pub glSecondaryColor3i: *mut c_void,
2082    pub glSecondaryColor3iv: *mut c_void,
2083    pub glSecondaryColor3s: *mut c_void,
2084    pub glSecondaryColor3sv: *mut c_void,
2085    pub glSecondaryColor3ub: *mut c_void,
2086    pub glSecondaryColor3ubv: *mut c_void,
2087    pub glSecondaryColor3ui: *mut c_void,
2088    pub glSecondaryColor3uiv: *mut c_void,
2089    pub glSecondaryColor3us: *mut c_void,
2090    pub glSecondaryColor3usv: *mut c_void,
2091    pub glSecondaryColorP3ui: *mut c_void,
2092    pub glSecondaryColorP3uiv: *mut c_void,
2093    pub glSecondaryColorPointer: *mut c_void,
2094    pub glSelectBuffer: *mut c_void,
2095    pub glSetFenceAPPLE: *mut c_void,
2096    pub glShadeModel: *mut c_void,
2097    pub glShaderSource: *mut c_void,
2098    pub glShaderStorageBlockBinding: *mut c_void,
2099    pub glStencilFunc: *mut c_void,
2100    pub glStencilFuncSeparate: *mut c_void,
2101    pub glStencilMask: *mut c_void,
2102    pub glStencilMaskSeparate: *mut c_void,
2103    pub glStencilOp: *mut c_void,
2104    pub glStencilOpSeparate: *mut c_void,
2105    pub glTestFenceAPPLE: *mut c_void,
2106    pub glTestObjectAPPLE: *mut c_void,
2107    pub glTexBuffer: *mut c_void,
2108    pub glTexCoord1d: *mut c_void,
2109    pub glTexCoord1dv: *mut c_void,
2110    pub glTexCoord1f: *mut c_void,
2111    pub glTexCoord1fv: *mut c_void,
2112    pub glTexCoord1i: *mut c_void,
2113    pub glTexCoord1iv: *mut c_void,
2114    pub glTexCoord1s: *mut c_void,
2115    pub glTexCoord1sv: *mut c_void,
2116    pub glTexCoord2d: *mut c_void,
2117    pub glTexCoord2dv: *mut c_void,
2118    pub glTexCoord2f: *mut c_void,
2119    pub glTexCoord2fv: *mut c_void,
2120    pub glTexCoord2i: *mut c_void,
2121    pub glTexCoord2iv: *mut c_void,
2122    pub glTexCoord2s: *mut c_void,
2123    pub glTexCoord2sv: *mut c_void,
2124    pub glTexCoord3d: *mut c_void,
2125    pub glTexCoord3dv: *mut c_void,
2126    pub glTexCoord3f: *mut c_void,
2127    pub glTexCoord3fv: *mut c_void,
2128    pub glTexCoord3i: *mut c_void,
2129    pub glTexCoord3iv: *mut c_void,
2130    pub glTexCoord3s: *mut c_void,
2131    pub glTexCoord3sv: *mut c_void,
2132    pub glTexCoord4d: *mut c_void,
2133    pub glTexCoord4dv: *mut c_void,
2134    pub glTexCoord4f: *mut c_void,
2135    pub glTexCoord4fv: *mut c_void,
2136    pub glTexCoord4i: *mut c_void,
2137    pub glTexCoord4iv: *mut c_void,
2138    pub glTexCoord4s: *mut c_void,
2139    pub glTexCoord4sv: *mut c_void,
2140    pub glTexCoordP1ui: *mut c_void,
2141    pub glTexCoordP1uiv: *mut c_void,
2142    pub glTexCoordP2ui: *mut c_void,
2143    pub glTexCoordP2uiv: *mut c_void,
2144    pub glTexCoordP3ui: *mut c_void,
2145    pub glTexCoordP3uiv: *mut c_void,
2146    pub glTexCoordP4ui: *mut c_void,
2147    pub glTexCoordP4uiv: *mut c_void,
2148    pub glTexCoordPointer: *mut c_void,
2149    pub glTexEnvf: *mut c_void,
2150    pub glTexEnvfv: *mut c_void,
2151    pub glTexEnvi: *mut c_void,
2152    pub glTexEnviv: *mut c_void,
2153    pub glTexGend: *mut c_void,
2154    pub glTexGendv: *mut c_void,
2155    pub glTexGenf: *mut c_void,
2156    pub glTexGenfv: *mut c_void,
2157    pub glTexGeni: *mut c_void,
2158    pub glTexGeniv: *mut c_void,
2159    pub glTexImage1D: *mut c_void,
2160    pub glTexImage2D: *mut c_void,
2161    pub glTexImage2DMultisample: *mut c_void,
2162    pub glTexImage3D: *mut c_void,
2163    pub glTexImage3DMultisample: *mut c_void,
2164    pub glTexParameterIiv: *mut c_void,
2165    pub glTexParameterIuiv: *mut c_void,
2166    pub glTexParameterf: *mut c_void,
2167    pub glTexParameterfv: *mut c_void,
2168    pub glTexParameteri: *mut c_void,
2169    pub glTexParameteriv: *mut c_void,
2170    pub glTexStorage1D: *mut c_void,
2171    pub glTexStorage2D: *mut c_void,
2172    pub glTexStorage3D: *mut c_void,
2173    pub glTexSubImage1D: *mut c_void,
2174    pub glTexSubImage2D: *mut c_void,
2175    pub glTexSubImage3D: *mut c_void,
2176    pub glTextureRangeAPPLE: *mut c_void,
2177    pub glTransformFeedbackVaryings: *mut c_void,
2178    pub glTranslated: *mut c_void,
2179    pub glTranslatef: *mut c_void,
2180    pub glUniform1f: *mut c_void,
2181    pub glUniform1fv: *mut c_void,
2182    pub glUniform1i: *mut c_void,
2183    pub glUniform1iv: *mut c_void,
2184    pub glUniform1ui: *mut c_void,
2185    pub glUniform1uiv: *mut c_void,
2186    pub glUniform2f: *mut c_void,
2187    pub glUniform2fv: *mut c_void,
2188    pub glUniform2i: *mut c_void,
2189    pub glUniform2iv: *mut c_void,
2190    pub glUniform2ui: *mut c_void,
2191    pub glUniform2uiv: *mut c_void,
2192    pub glUniform3f: *mut c_void,
2193    pub glUniform3fv: *mut c_void,
2194    pub glUniform3i: *mut c_void,
2195    pub glUniform3iv: *mut c_void,
2196    pub glUniform3ui: *mut c_void,
2197    pub glUniform3uiv: *mut c_void,
2198    pub glUniform4f: *mut c_void,
2199    pub glUniform4fv: *mut c_void,
2200    pub glUniform4i: *mut c_void,
2201    pub glUniform4iv: *mut c_void,
2202    pub glUniform4ui: *mut c_void,
2203    pub glUniform4uiv: *mut c_void,
2204    pub glUniformBlockBinding: *mut c_void,
2205    pub glUniformMatrix2fv: *mut c_void,
2206    pub glUniformMatrix2x3fv: *mut c_void,
2207    pub glUniformMatrix2x4fv: *mut c_void,
2208    pub glUniformMatrix3fv: *mut c_void,
2209    pub glUniformMatrix3x2fv: *mut c_void,
2210    pub glUniformMatrix3x4fv: *mut c_void,
2211    pub glUniformMatrix4fv: *mut c_void,
2212    pub glUniformMatrix4x2fv: *mut c_void,
2213    pub glUniformMatrix4x3fv: *mut c_void,
2214    pub glUnmapBuffer: *mut c_void,
2215    pub glUseProgram: *mut c_void,
2216    pub glValidateProgram: *mut c_void,
2217    pub glVertex2d: *mut c_void,
2218    pub glVertex2dv: *mut c_void,
2219    pub glVertex2f: *mut c_void,
2220    pub glVertex2fv: *mut c_void,
2221    pub glVertex2i: *mut c_void,
2222    pub glVertex2iv: *mut c_void,
2223    pub glVertex2s: *mut c_void,
2224    pub glVertex2sv: *mut c_void,
2225    pub glVertex3d: *mut c_void,
2226    pub glVertex3dv: *mut c_void,
2227    pub glVertex3f: *mut c_void,
2228    pub glVertex3fv: *mut c_void,
2229    pub glVertex3i: *mut c_void,
2230    pub glVertex3iv: *mut c_void,
2231    pub glVertex3s: *mut c_void,
2232    pub glVertex3sv: *mut c_void,
2233    pub glVertex4d: *mut c_void,
2234    pub glVertex4dv: *mut c_void,
2235    pub glVertex4f: *mut c_void,
2236    pub glVertex4fv: *mut c_void,
2237    pub glVertex4i: *mut c_void,
2238    pub glVertex4iv: *mut c_void,
2239    pub glVertex4s: *mut c_void,
2240    pub glVertex4sv: *mut c_void,
2241    pub glVertexAttrib1d: *mut c_void,
2242    pub glVertexAttrib1dv: *mut c_void,
2243    pub glVertexAttrib1f: *mut c_void,
2244    pub glVertexAttrib1fv: *mut c_void,
2245    pub glVertexAttrib1s: *mut c_void,
2246    pub glVertexAttrib1sv: *mut c_void,
2247    pub glVertexAttrib2d: *mut c_void,
2248    pub glVertexAttrib2dv: *mut c_void,
2249    pub glVertexAttrib2f: *mut c_void,
2250    pub glVertexAttrib2fv: *mut c_void,
2251    pub glVertexAttrib2s: *mut c_void,
2252    pub glVertexAttrib2sv: *mut c_void,
2253    pub glVertexAttrib3d: *mut c_void,
2254    pub glVertexAttrib3dv: *mut c_void,
2255    pub glVertexAttrib3f: *mut c_void,
2256    pub glVertexAttrib3fv: *mut c_void,
2257    pub glVertexAttrib3s: *mut c_void,
2258    pub glVertexAttrib3sv: *mut c_void,
2259    pub glVertexAttrib4Nbv: *mut c_void,
2260    pub glVertexAttrib4Niv: *mut c_void,
2261    pub glVertexAttrib4Nsv: *mut c_void,
2262    pub glVertexAttrib4Nub: *mut c_void,
2263    pub glVertexAttrib4Nubv: *mut c_void,
2264    pub glVertexAttrib4Nuiv: *mut c_void,
2265    pub glVertexAttrib4Nusv: *mut c_void,
2266    pub glVertexAttrib4bv: *mut c_void,
2267    pub glVertexAttrib4d: *mut c_void,
2268    pub glVertexAttrib4dv: *mut c_void,
2269    pub glVertexAttrib4f: *mut c_void,
2270    pub glVertexAttrib4fv: *mut c_void,
2271    pub glVertexAttrib4iv: *mut c_void,
2272    pub glVertexAttrib4s: *mut c_void,
2273    pub glVertexAttrib4sv: *mut c_void,
2274    pub glVertexAttrib4ubv: *mut c_void,
2275    pub glVertexAttrib4uiv: *mut c_void,
2276    pub glVertexAttrib4usv: *mut c_void,
2277    pub glVertexAttribDivisor: *mut c_void,
2278    pub glVertexAttribI1i: *mut c_void,
2279    pub glVertexAttribI1iv: *mut c_void,
2280    pub glVertexAttribI1ui: *mut c_void,
2281    pub glVertexAttribI1uiv: *mut c_void,
2282    pub glVertexAttribI2i: *mut c_void,
2283    pub glVertexAttribI2iv: *mut c_void,
2284    pub glVertexAttribI2ui: *mut c_void,
2285    pub glVertexAttribI2uiv: *mut c_void,
2286    pub glVertexAttribI3i: *mut c_void,
2287    pub glVertexAttribI3iv: *mut c_void,
2288    pub glVertexAttribI3ui: *mut c_void,
2289    pub glVertexAttribI3uiv: *mut c_void,
2290    pub glVertexAttribI4bv: *mut c_void,
2291    pub glVertexAttribI4i: *mut c_void,
2292    pub glVertexAttribI4iv: *mut c_void,
2293    pub glVertexAttribI4sv: *mut c_void,
2294    pub glVertexAttribI4ubv: *mut c_void,
2295    pub glVertexAttribI4ui: *mut c_void,
2296    pub glVertexAttribI4uiv: *mut c_void,
2297    pub glVertexAttribI4usv: *mut c_void,
2298    pub glVertexAttribIPointer: *mut c_void,
2299    pub glVertexAttribP1ui: *mut c_void,
2300    pub glVertexAttribP1uiv: *mut c_void,
2301    pub glVertexAttribP2ui: *mut c_void,
2302    pub glVertexAttribP2uiv: *mut c_void,
2303    pub glVertexAttribP3ui: *mut c_void,
2304    pub glVertexAttribP3uiv: *mut c_void,
2305    pub glVertexAttribP4ui: *mut c_void,
2306    pub glVertexAttribP4uiv: *mut c_void,
2307    pub glVertexAttribPointer: *mut c_void,
2308    pub glVertexP2ui: *mut c_void,
2309    pub glVertexP2uiv: *mut c_void,
2310    pub glVertexP3ui: *mut c_void,
2311    pub glVertexP3uiv: *mut c_void,
2312    pub glVertexP4ui: *mut c_void,
2313    pub glVertexP4uiv: *mut c_void,
2314    pub glVertexPointer: *mut c_void,
2315    pub glViewport: *mut c_void,
2316    pub glWaitSync: *mut c_void,
2317    pub glWindowPos2d: *mut c_void,
2318    pub glWindowPos2dv: *mut c_void,
2319    pub glWindowPos2f: *mut c_void,
2320    pub glWindowPos2fv: *mut c_void,
2321    pub glWindowPos2i: *mut c_void,
2322    pub glWindowPos2iv: *mut c_void,
2323    pub glWindowPos2s: *mut c_void,
2324    pub glWindowPos2sv: *mut c_void,
2325    pub glWindowPos3d: *mut c_void,
2326    pub glWindowPos3dv: *mut c_void,
2327    pub glWindowPos3f: *mut c_void,
2328    pub glWindowPos3fv: *mut c_void,
2329    pub glWindowPos3i: *mut c_void,
2330    pub glWindowPos3iv: *mut c_void,
2331    pub glWindowPos3s: *mut c_void,
2332    pub glWindowPos3sv: *mut c_void,
2333    pub glStartTilingQCOM: *mut c_void,
2334    pub glEndTilingQCOM: *mut c_void,
2335}
2336
2337fn encode_ascii(input: &str) -> Vec<i8> {
2338    input
2339    .chars()
2340    .filter(|c| c.is_ascii())
2341    .map(|c| c as i8)
2342    .chain(Some(0).into_iter())
2343    .collect::<Vec<_>>()
2344}
2345
2346pub unsafe fn cstr_from_ptr<'a>(ptr: *const c_char) -> &'a str {
2347
2348    #[inline]
2349    unsafe fn strlen(mut s: *const c_char) -> usize {
2350        let mut result = 0;
2351        while *s != 0 {
2352            s = s.offset(1);
2353            result += 1;
2354        }
2355        result
2356    }
2357
2358    let len = strlen(ptr);
2359    let ptr = ptr as *const u8; // c_char is always one byte, safe cast
2360    core::str::from_utf8_unchecked(core::slice::from_raw_parts(ptr, len as usize + 1))
2361}
2362
2363macro_rules! impl_gl_context {
2364    ($($opt:ident)?) => {
2365        $( $opt )? fn get_type(&self) -> GlType { GlType::Gl }
2366
2367        $( $opt )? fn buffer_data_untyped(
2368            &self,
2369            target: GLenum,
2370            size: GLsizeiptr,
2371            data: *const GLvoid,
2372            usage: GLenum,
2373        ) {
2374
2375            #[cfg(feature = "debug")] { _gl_print_debug("glBufferData"); }
2376            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2377
2378            if self.glBufferData == ptr::null_mut() {
2379                _gl_impl_panic("glBufferData");
2380                return;
2381            }
2382
2383            unsafe {
2384                let func: extern "system" fn(GLenum, GLsizeiptr, *const GLvoid, GLenum) = mem::transmute(self.glBufferData);
2385                (func)(target, size, data, usage)
2386            }
2387        }
2388
2389        $( $opt )? fn buffer_sub_data_untyped(
2390            &self,
2391            target: GLenum,
2392            offset: isize,
2393            size: GLsizeiptr,
2394            data: *const GLvoid,
2395        ) {
2396
2397            #[cfg(feature = "debug")] { _gl_print_debug("glBufferSubData"); }
2398            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2399
2400            if self.glBufferSubData == ptr::null_mut() {
2401                _gl_impl_panic("glBufferSubData");
2402                return;
2403            }
2404
2405            unsafe {
2406                let func: extern "system" fn(GLenum, isize, GLsizeiptr, *const GLvoid) = mem::transmute(self.glBufferSubData);
2407                (func)(target, offset, size, data)
2408            }
2409        }
2410
2411        $( $opt )? fn map_buffer(&self, target: GLenum, access: GLbitfield) -> *mut GLvoid {
2412
2413            #[cfg(feature = "debug")] { _gl_print_debug("glMapBuffer"); }
2414            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2415
2416            if self.glMapBuffer == ptr::null_mut() {
2417                _gl_impl_panic("glMapBuffer");
2418                return ptr::null_mut();
2419            }
2420
2421            unsafe {
2422                let func: extern "system" fn(GLenum, GLbitfield) -> *mut GLvoid = mem::transmute(self.glMapBuffer);
2423                (func)(target, access)
2424            }
2425        }
2426
2427        $( $opt )? fn map_buffer_range(
2428            &self,
2429            target: GLenum,
2430            offset: GLintptr,
2431            length: GLsizeiptr,
2432            access: GLbitfield,
2433        ) -> *mut GLvoid {
2434
2435            #[cfg(feature = "debug")] { _gl_print_debug("glMapBufferRange"); }
2436            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2437
2438            if self.glMapBufferRange == ptr::null_mut() {
2439                _gl_impl_panic("glMapBufferRange");
2440                return ptr::null_mut();
2441            }
2442
2443            unsafe {
2444                let func: extern "system" fn( GLenum, GLintptr, GLsizeiptr, GLbitfield) -> *mut GLvoid = mem::transmute(self.glMapBufferRange);
2445                (func)(target, offset, length, access)
2446            }
2447        }
2448
2449        $( $opt )? fn unmap_buffer(&self, target: GLenum) -> GLboolean {
2450
2451            #[cfg(feature = "debug")] { _gl_print_debug("glUnmapBuffer"); }
2452            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2453
2454            if self.glUnmapBuffer == ptr::null_mut() {
2455                _gl_impl_panic("glUnmapBuffer");
2456                return 1;
2457            }
2458            unsafe {
2459                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glUnmapBuffer);
2460                (func)(target)
2461            }
2462        }
2463
2464        $( $opt )? fn tex_buffer(&self, target: GLenum, internal_format: GLenum, buffer: GLuint) {
2465
2466            #[cfg(feature = "debug")] { _gl_print_debug("glTexBuffer"); }
2467            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2468
2469            if self.glTexBuffer == ptr::null_mut() {
2470                _gl_impl_panic("glTexBuffer");
2471                return;
2472            }
2473            unsafe {
2474                let func: extern "system" fn(GLenum, GLenum, GLuint) = mem::transmute(self.glTexBuffer);
2475                (func)(target, internal_format, buffer)
2476            }
2477        }
2478
2479        $( $opt )? fn shader_source(&self, shader: GLuint, strings: &[&[u8]]) {
2480
2481            #[cfg(feature = "debug")] { _gl_print_debug("glShaderSource"); }
2482            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2483
2484            let pointers: Vec<*const u8> = strings.iter().map(|string| (*string).as_ptr()).collect();
2485            let lengths: Vec<GLint> = strings.iter().map(|string| string.len() as GLint).collect();
2486
2487            if self.glShaderSource == ptr::null_mut() {
2488                _gl_impl_panic("glShaderSource");
2489                return;
2490            }
2491
2492            unsafe {
2493                let func: extern "system" fn(GLuint, GLsizei, *const *const GLchar, *const GLint) = mem::transmute(self.glShaderSource);
2494                (func)(shader, pointers.len() as GLsizei, pointers.as_ptr() as *const *const GLchar, lengths.as_ptr())
2495            }
2496
2497            mem::drop(lengths);
2498            mem::drop(pointers);
2499        }
2500
2501        $( $opt )? fn read_buffer(&self, mode: GLenum) {
2502
2503            #[cfg(feature = "debug")] { _gl_print_debug("glReadBuffer"); }
2504            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2505
2506            if self.glReadBuffer == ptr::null_mut() {
2507                _gl_impl_panic("glReadBuffer");
2508                return;
2509            }
2510            unsafe {
2511                let func: extern "system" fn(GLenum) = mem::transmute(self.glReadBuffer);
2512                (func)(mode)
2513            }
2514        }
2515
2516        $( $opt )? fn read_pixels_into_buffer(
2517            &self,
2518            x: GLint,
2519            y: GLint,
2520            width: GLsizei,
2521            height: GLsizei,
2522            format: GLenum,
2523            pixel_type: GLenum,
2524            dst_buffer: &mut [u8],
2525        ) {
2526
2527            #[cfg(feature = "debug")] { _gl_print_debug("glReadPixels"); }
2528            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2529
2530            if self.glReadPixels == ptr::null_mut() {
2531                _gl_impl_panic("glReadPixels");
2532                return;
2533            }
2534
2535
2536            #[cfg(feature = "debug")] { _gl_print_debug("glPixelStorei"); }
2537            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2538
2539            if self.glPixelStorei == ptr::null_mut() {
2540                _gl_impl_panic("glPixelStorei");
2541                return;
2542            }
2543
2544            unsafe {
2545                let glPixelStorei: extern "system" fn(GLenum, GLint) = mem::transmute(self.glPixelStorei);
2546                (glPixelStorei)(gl::PACK_ALIGNMENT, 1);
2547
2548                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *mut u8) = mem::transmute(self.glReadPixels);
2549                (func)(x, y, width, height, format, pixel_type, dst_buffer.as_mut_ptr())
2550            }
2551        }
2552
2553        $( $opt )? fn read_pixels(
2554            &self,
2555            x: GLint,
2556            y: GLint,
2557            width: GLsizei,
2558            height: GLsizei,
2559            format: GLenum,
2560            pixel_type: GLenum,
2561        ) -> Vec<u8> {
2562
2563            use gl::*;
2564
2565            let bit_depth = match pixel_type {
2566
2567                UNSIGNED_BYTE |
2568                BYTE |
2569                UNSIGNED_BYTE_3_3_2 |
2570                UNSIGNED_BYTE_2_3_3_REV => 1,
2571
2572                UNSIGNED_SHORT |
2573                UNSIGNED_SHORT_5_6_5 |
2574                UNSIGNED_SHORT_5_6_5_REV |
2575                UNSIGNED_SHORT_4_4_4_4 |
2576                UNSIGNED_SHORT_4_4_4_4_REV |
2577                UNSIGNED_SHORT_5_5_5_1 |
2578                UNSIGNED_SHORT_1_5_5_5_REV |
2579                SHORT => 2,
2580
2581                UNSIGNED_INT |
2582                UNSIGNED_INT_8_8_8_8 |
2583                UNSIGNED_INT_8_8_8_8_REV |
2584                UNSIGNED_INT_10_10_10_2 |
2585                UNSIGNED_INT_2_10_10_10_REV |
2586                UNSIGNED_INT_24_8 |
2587                UNSIGNED_INT_10F_11F_11F_REV |
2588                UNSIGNED_INT_5_9_9_9_REV |
2589                INT => 4,
2590
2591                HALF_FLOAT => 2,
2592
2593                FLOAT |
2594                FLOAT_32_UNSIGNED_INT_24_8_REV => 4,
2595
2596                _ => 0,
2597            };
2598
2599            let mut v = vec![0;width as usize * height as usize * bit_depth];
2600            self.read_pixels_into_buffer(x, y, width, height, format, pixel_type, &mut v[..]);
2601            v
2602        }
2603
2604        $( $opt )? unsafe fn read_pixels_into_pbo(
2605            &self,
2606            x: GLint,
2607            y: GLint,
2608            width: GLsizei,
2609            height: GLsizei,
2610            format: GLenum,
2611            pixel_type: GLenum,
2612        ) {
2613
2614            #[cfg(feature = "debug")] { _gl_print_debug("glReadPixels"); }
2615            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2616
2617            if self.glReadPixels == ptr::null_mut() {
2618                _gl_impl_panic("glReadPixels");
2619                return;
2620            }
2621
2622            let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *mut u8) = mem::transmute(self.glReadPixels);
2623            (func)(x, y, width, height, format, pixel_type, ptr::null_mut())
2624        }
2625
2626        $( $opt )? fn sample_coverage(&self, value: GLclampf, invert: bool) {
2627
2628            #[cfg(feature = "debug")] { _gl_print_debug("glSampleCoverage"); }
2629            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2630
2631            if self.glSampleCoverage == ptr::null_mut() {
2632                _gl_impl_panic("glSampleCoverage");
2633                return;
2634            }
2635
2636            unsafe {
2637                let func: extern "system" fn(GLclampf, bool) = mem::transmute(self.glSampleCoverage);
2638                (func)(value, invert)
2639            }
2640        }
2641
2642        $( $opt )? fn polygon_offset(&self, factor: GLfloat, units: GLfloat) {
2643
2644            #[cfg(feature = "debug")] { _gl_print_debug("glPolygonOffset"); }
2645            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2646
2647            if self.glPolygonOffset == ptr::null_mut() {
2648                _gl_impl_panic("glPolygonOffset");
2649                return;
2650            }
2651
2652            unsafe {
2653                let func: extern "system" fn(GLfloat, GLfloat) = mem::transmute(self.glPolygonOffset);
2654                (func)(factor, units)
2655            }
2656        }
2657
2658        $( $opt )? fn pixel_store_i(&self, name: GLenum, param: GLint) {
2659
2660            #[cfg(feature = "debug")] { _gl_print_debug("glPixelStorei"); }
2661            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2662
2663            if self.glPixelStorei == ptr::null_mut() {
2664                _gl_impl_panic("glPixelStorei");
2665                return;
2666            }
2667
2668            unsafe {
2669                let func: extern "system" fn(GLenum, GLint) = mem::transmute(self.glPixelStorei);
2670                (func)(name, param)
2671            }
2672        }
2673
2674        $( $opt )? fn gen_buffers(&self, n: GLsizei) -> Vec<GLuint> {
2675
2676            #[cfg(feature = "debug")] { _gl_print_debug("glGenBuffers"); }
2677            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2678
2679            if self.glGenBuffers == ptr::null_mut() {
2680                _gl_impl_panic("glGenBuffers");
2681                return Vec::new();
2682            }
2683
2684            let mut v = vec![0;n.max(0) as usize];
2685            unsafe {
2686                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenBuffers);
2687                (func)(n, v.as_mut_ptr());
2688            }
2689            v
2690        }
2691
2692        $( $opt )? fn gen_renderbuffers(&self, n: GLsizei) -> Vec<GLuint> {
2693
2694            #[cfg(feature = "debug")] { _gl_print_debug("glGenRenderbuffers"); }
2695            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2696
2697            if self.glGenRenderbuffers == ptr::null_mut() {
2698                _gl_impl_panic("glGenRenderbuffers");
2699                return Vec::new();
2700            }
2701
2702            let mut v = vec![0;n.max(0) as usize];
2703            unsafe {
2704                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenRenderbuffers);
2705                (func)(n, v.as_mut_ptr());
2706            }
2707            v
2708        }
2709
2710        $( $opt )? fn gen_framebuffers(&self, n: GLsizei) -> Vec<GLuint> {
2711
2712            #[cfg(feature = "debug")] { _gl_print_debug("glGenFramebuffers"); }
2713            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2714
2715            if self.glGenFramebuffers == ptr::null_mut() {
2716                _gl_impl_panic("glGenFramebuffers");
2717                return Vec::new();
2718            }
2719
2720            let mut v = vec![0;n.max(0) as usize];
2721            unsafe {
2722                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenFramebuffers);
2723                (func)(n, v.as_mut_ptr());
2724            }
2725            v
2726        }
2727
2728        $( $opt )? fn gen_textures(&self, n: GLsizei) -> Vec<GLuint> {
2729
2730            #[cfg(feature = "debug")] { _gl_print_debug("glGenTextures"); }
2731            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2732
2733            if self.glGenTextures == ptr::null_mut() {
2734                _gl_impl_panic("glGenTextures");
2735                return Vec::new();
2736            }
2737
2738            let mut v = vec![0;n.max(0) as usize];
2739            unsafe {
2740                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenTextures);
2741                (func)(n, v.as_mut_ptr());
2742            }
2743            v
2744        }
2745
2746        $( $opt )? fn gen_vertex_arrays(&self, n: GLsizei) -> Vec<GLuint> {
2747
2748            #[cfg(feature = "debug")] { _gl_print_debug("glGenVertexArrays"); }
2749            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2750
2751            if self.glGenVertexArrays == ptr::null_mut() {
2752                _gl_impl_panic("glGenVertexArrays");
2753                return Vec::new();
2754            }
2755
2756            let mut v = vec![0;n.max(0) as usize];
2757            unsafe {
2758                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenVertexArrays);
2759                (func)(n, v.as_mut_ptr());
2760            }
2761            v
2762        }
2763
2764        $( $opt )? fn gen_vertex_arrays_apple(&self, n: GLsizei) -> Vec<GLuint> {
2765
2766            #[cfg(feature = "debug")] { _gl_print_debug("glGenVertexArraysAPPLE"); }
2767            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2768
2769            if self.glGenVertexArraysAPPLE == ptr::null_mut() {
2770                _gl_impl_panic("glGenVertexArraysAPPLE");
2771                return Vec::new();
2772            }
2773
2774            let mut v = vec![0;n.max(0) as usize];
2775            unsafe {
2776                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenVertexArraysAPPLE);
2777                (func)(n, v.as_mut_ptr());
2778            }
2779            v
2780        }
2781
2782        $( $opt )? fn gen_queries(&self, n: GLsizei) -> Vec<GLuint> {
2783
2784            #[cfg(feature = "debug")] { _gl_print_debug("glGenQueries"); }
2785            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2786
2787            if self.glGenQueries == ptr::null_mut() {
2788                _gl_impl_panic("glGenQueries");
2789                return Vec::new();
2790            }
2791
2792            let mut v = vec![0;n.max(0) as usize];
2793            unsafe {
2794                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenQueries);
2795                (func)(n, v.as_mut_ptr());
2796            }
2797            v
2798        }
2799
2800        $( $opt )? fn begin_query(&self, target: GLenum, id: GLuint) {
2801
2802            #[cfg(feature = "debug")] { _gl_print_debug("glBeginQuery"); }
2803            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2804
2805            if self.glBeginQuery == ptr::null_mut() {
2806                _gl_impl_panic("glBeginQuery");
2807                return;
2808            }
2809
2810            unsafe {
2811                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBeginQuery);
2812                (func)(target, id)
2813            }
2814        }
2815
2816        $( $opt )? fn end_query(&self, target: GLenum) {
2817
2818            #[cfg(feature = "debug")] { _gl_print_debug("glEndQuery"); }
2819            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2820
2821            if self.glEndQuery == ptr::null_mut() {
2822                _gl_impl_panic("glEndQuery");
2823                return;
2824            }
2825
2826            unsafe {
2827                let func: extern "system" fn(GLenum) = mem::transmute(self.glEndQuery);
2828                (func)(target)
2829            }
2830        }
2831
2832        $( $opt )? fn query_counter(&self, id: GLuint, target: GLenum) {
2833
2834            #[cfg(feature = "debug")] { _gl_print_debug("glQueryCounter"); }
2835            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2836
2837            if self.glQueryCounter == ptr::null_mut() {
2838                _gl_impl_panic("glQueryCounter");
2839                return;
2840            }
2841
2842            unsafe {
2843                let func: extern "system" fn(GLuint, GLenum) = mem::transmute(self.glQueryCounter);
2844                (func)(id, target)
2845            }
2846        }
2847
2848        $( $opt )? fn get_query_object_iv(&self, id: GLuint, pname: GLenum) -> i32 {
2849
2850            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectiv"); }
2851            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2852
2853            if self.glGetQueryObjectiv == ptr::null_mut() {
2854                _gl_impl_panic("glGetQueryObjectiv");
2855                return 0;
2856            }
2857
2858            unsafe {
2859                let func: extern "system" fn(GLuint, GLenum) -> i32 = mem::transmute(self.glGetQueryObjectiv);
2860                (func)(id, pname)
2861            }
2862        }
2863
2864        $( $opt )? fn get_query_object_uiv(&self, id: GLuint, pname: GLenum) -> u32 {
2865
2866            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectuiv"); }
2867            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2868
2869            if self.glGetQueryObjectuiv == ptr::null_mut() {
2870                _gl_impl_panic("glGetQueryObjectuiv");
2871                return 0;
2872            }
2873
2874            unsafe {
2875                let func: extern "system" fn(GLuint, GLenum) -> u32 = mem::transmute(self.glGetQueryObjectuiv);
2876                (func)(id, pname)
2877            }
2878        }
2879
2880        $( $opt )? fn get_query_object_i64v(&self, id: GLuint, pname: GLenum) -> i64 {
2881
2882            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjecti64v"); }
2883            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2884
2885            if self.glGetQueryObjecti64v == ptr::null_mut() {
2886                _gl_impl_panic("glGetQueryObjecti64v");
2887                return 0;
2888            }
2889
2890            unsafe {
2891                let func: extern "system" fn(GLuint, GLenum) -> i64 = mem::transmute(self.glGetQueryObjecti64v);
2892                (func)(id, pname)
2893            }
2894        }
2895
2896        $( $opt )? fn get_query_object_ui64v(&self, id: GLuint, pname: GLenum) -> u64 {
2897
2898            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectui64v"); }
2899            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2900
2901            if self.glGetQueryObjectui64v == ptr::null_mut() {
2902                _gl_impl_panic("glGetQueryObjectui64v");
2903                return 0;
2904            }
2905
2906            unsafe {
2907                let func: extern "system" fn(GLuint, GLenum) -> u64 = mem::transmute(self.glGetQueryObjectui64v);
2908                (func)(id, pname)
2909            }
2910        }
2911
2912        $( $opt )? fn delete_queries(&self, queries: &[GLuint]) {
2913
2914            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteQueries"); }
2915            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2916
2917            if self.glDeleteQueries == ptr::null_mut() {
2918                _gl_impl_panic("glDeleteQueries");
2919                return;
2920            }
2921
2922            unsafe {
2923                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteQueries);
2924                (func)(queries.len() as GLsizei, queries.as_ptr())
2925            }
2926        }
2927
2928        $( $opt )? fn delete_vertex_arrays(&self, vertex_arrays: &[GLuint]) {
2929
2930            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteVertexArrays"); }
2931            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2932
2933            if self.glDeleteVertexArrays == ptr::null_mut() {
2934                _gl_impl_panic("glDeleteVertexArrays");
2935                return;
2936            }
2937
2938            unsafe {
2939                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteVertexArrays);
2940                (func)(vertex_arrays.len() as GLsizei, vertex_arrays.as_ptr())
2941            }
2942        }
2943
2944        $( $opt )? fn delete_vertex_arrays_apple(&self, vertex_arrays: &[GLuint]) {
2945
2946            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteVertexArraysAPPLE"); }
2947            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2948
2949            if self.glDeleteVertexArraysAPPLE == ptr::null_mut() {
2950                _gl_impl_panic("glDeleteVertexArraysAPPLE");
2951                return;
2952            }
2953
2954            unsafe {
2955                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteVertexArraysAPPLE);
2956                (func)(vertex_arrays.len() as GLsizei, vertex_arrays.as_ptr())
2957            }
2958        }
2959
2960        $( $opt )? fn delete_buffers(&self, buffers: &[GLuint]) {
2961
2962            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteBuffers"); }
2963            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2964
2965            if self.glDeleteBuffers == ptr::null_mut() {
2966                _gl_impl_panic("glDeleteBuffers");
2967                return;
2968            }
2969
2970            unsafe {
2971                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteBuffers);
2972                (func)(buffers.len() as GLsizei, buffers.as_ptr())
2973            }
2974        }
2975
2976        $( $opt )? fn delete_renderbuffers(&self, renderbuffers: &[GLuint]) {
2977
2978            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteRenderbuffers"); }
2979            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2980
2981            if self.glDeleteRenderbuffers == ptr::null_mut() {
2982                _gl_impl_panic("glDeleteRenderbuffers");
2983                return;
2984            }
2985
2986            unsafe {
2987                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteRenderbuffers);
2988                (func)(renderbuffers.len() as GLsizei, renderbuffers.as_ptr())
2989            }
2990        }
2991
2992        $( $opt )? fn delete_framebuffers(&self, framebuffers: &[GLuint]) {
2993
2994            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteFramebuffers"); }
2995            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2996
2997            if self.glDeleteFramebuffers == ptr::null_mut() {
2998                _gl_impl_panic("glDeleteFramebuffers");
2999                return;
3000            }
3001
3002            unsafe {
3003                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteFramebuffers);
3004                (func)(framebuffers.len() as GLsizei, framebuffers.as_ptr())
3005            }
3006        }
3007
3008        $( $opt )? fn delete_textures(&self, textures: &[GLuint]) {
3009
3010            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteTextures"); }
3011            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3012
3013            if self.glDeleteTextures == ptr::null_mut() {
3014                _gl_impl_panic("glDeleteTextures");
3015                return;
3016            }
3017
3018            unsafe {
3019                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteTextures);
3020                (func)(textures.len() as GLsizei, textures.as_ptr())
3021            }
3022        }
3023
3024        $( $opt )? fn framebuffer_renderbuffer(
3025            &self,
3026            target: GLenum,
3027            attachment: GLenum,
3028            renderbuffertarget: GLenum,
3029            renderbuffer: GLuint,
3030        ) {
3031
3032            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferRenderbuffer"); }
3033            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3034
3035            if self.glFramebufferRenderbuffer == ptr::null_mut() {
3036                _gl_impl_panic("glFramebufferRenderbuffer");
3037                return;
3038            }
3039
3040            unsafe {
3041                let func: extern "system" fn(GLenum, GLenum, GLenum, GLuint) = mem::transmute(self.glFramebufferRenderbuffer);
3042                (func)( target, attachment, renderbuffertarget, renderbuffer)
3043            }
3044        }
3045
3046        $( $opt )? fn renderbuffer_storage(
3047            &self,
3048            target: GLenum,
3049            internalformat: GLenum,
3050            width: GLsizei,
3051            height: GLsizei,
3052        ) {
3053
3054            #[cfg(feature = "debug")] { _gl_print_debug("glRenderbufferStorage"); }
3055            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3056
3057            if self.glRenderbufferStorage == ptr::null_mut() {
3058                _gl_impl_panic("glRenderbufferStorage");
3059                return;
3060            }
3061
3062            unsafe {
3063                let func: extern "system" fn(GLenum, GLenum, GLsizei, GLsizei) = mem::transmute(self.glRenderbufferStorage);
3064                (func)(target, internalformat, width, height)
3065            }
3066        }
3067
3068        $( $opt )? fn depth_func(&self, func: GLenum) {
3069
3070            #[cfg(feature = "debug")] { _gl_print_debug("glDepthFunc"); }
3071            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3072
3073            if self.glDepthFunc == ptr::null_mut() {
3074                _gl_impl_panic("glDepthFunc");
3075                return;
3076            }
3077
3078            unsafe {
3079                let glDepthFunc: extern "system" fn(GLenum) = mem::transmute(self.glDepthFunc);
3080                (glDepthFunc)(func)
3081            }
3082        }
3083
3084        $( $opt )? fn active_texture(&self, texture: GLenum) {
3085
3086            #[cfg(feature = "debug")] { _gl_print_debug("glActiveTexture"); }
3087            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3088
3089            if self.glActiveTexture == ptr::null_mut() {
3090                _gl_impl_panic("glActiveTexture");
3091                return;
3092            }
3093
3094            unsafe {
3095                let func: extern "system" fn(GLenum) = mem::transmute(self.glActiveTexture);
3096                (func)(texture)
3097            }
3098        }
3099
3100        $( $opt )? fn attach_shader(&self, program: GLuint, shader: GLuint) {
3101
3102            #[cfg(feature = "debug")] { _gl_print_debug("glAttachShader"); }
3103            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3104
3105            if self.glAttachShader == ptr::null_mut() {
3106                _gl_impl_panic("glAttachShader");
3107                return;
3108            }
3109
3110            unsafe {
3111                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glAttachShader);
3112                (func)(program, shader)
3113            }
3114        }
3115
3116        $( $opt )? fn bind_attrib_location(&self, program: GLuint, index: GLuint, name: &str) {
3117
3118
3119            #[cfg(feature = "debug")] { _gl_print_debug("glBindAttribLocation"); }
3120            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3121
3122            if self.glBindAttribLocation == ptr::null_mut() {
3123                _gl_impl_panic("glBindAttribLocation");
3124                return;
3125            }
3126
3127            let cstr = encode_ascii(name);
3128
3129            unsafe {
3130                let func: extern "system" fn(GLuint, GLuint, *const c_char) = mem::transmute(self.glBindAttribLocation);
3131                (func)(program, index, cstr.as_ptr())
3132            }
3133        }
3134
3135        $( $opt )? unsafe fn get_uniform_iv(&self, program: GLuint, location: GLint, result: &mut [GLint]) {
3136
3137            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformiv"); }
3138            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3139
3140            if self.glGetUniformiv == ptr::null_mut() {
3141                _gl_impl_panic("glGetUniformiv");
3142                return;
3143            }
3144
3145            let func: extern "system" fn(GLuint, GLint, *mut GLint) = mem::transmute(self.glGetUniformiv);
3146            (func)(program, location, result.as_mut_ptr())
3147        }
3148
3149        $( $opt )? unsafe fn get_uniform_fv(&self, program: GLuint, location: GLint, result: &mut [GLfloat]) {
3150
3151            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformfv"); }
3152            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3153
3154            if self.glGetUniformfv == ptr::null_mut() {
3155                _gl_impl_panic("glGetUniformfv");
3156                return;
3157            }
3158
3159            let func: extern "system" fn(GLuint, GLint, *mut GLfloat) = mem::transmute(self.glGetUniformfv);
3160            (func)(program, location, result.as_mut_ptr())
3161        }
3162
3163        $( $opt )? fn get_uniform_block_index(&self, program: GLuint, name: &str) -> GLuint {
3164
3165            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformBlockIndex"); }
3166            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3167
3168            if self.glGetUniformBlockIndex == ptr::null_mut() {
3169                _gl_impl_panic("glGetUniformBlockIndex");
3170                return 0;
3171            }
3172
3173            let cstr = encode_ascii(name);
3174
3175            unsafe {
3176                let func: extern "system" fn(GLuint, *const c_char) -> GLuint = mem::transmute(self.glGetUniformBlockIndex);
3177                (func)(program, cstr.as_ptr())
3178            }
3179        }
3180
3181        // ---------------------------------------------------------------------------------------------------------------------------
3182        // ---------------------------------------------------------------------------------------------------------------------------
3183        // ---------------------------------------------------------------------------------------------------------------------------
3184        // ---------------------------------------------------------------------------------------------------------------------------
3185
3186        $( $opt )? fn get_uniform_indices(&self, program: GLuint, names: &[&str]) -> Vec<GLuint> {
3187
3188
3189            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformIndices"); }
3190            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3191
3192            if self.glGetUniformIndices == ptr::null_mut() {
3193                _gl_impl_panic("glGetUniformIndices");
3194                return Vec::new();
3195            }
3196
3197            let c_strings: Vec<Vec<i8>> = names.iter().map(|n| encode_ascii(*n)).collect();
3198            let pointers: Vec<*const GLchar> = c_strings.iter().map(|string| string.as_ptr()).collect();
3199            let mut result = vec![0;c_strings.len()];
3200            unsafe {
3201                let func: extern "system" fn(GLuint, GLsizei, *const *const GLchar, *const GLuint) -> GLuint = mem::transmute(self.glGetUniformIndices);
3202                (func)(
3203                    program,
3204                    pointers.len() as GLsizei,
3205                    pointers.as_ptr(),
3206                    result.as_mut_ptr(),
3207                );
3208            }
3209            result
3210        }
3211
3212        $( $opt )? fn bind_buffer_base(&self, target: GLenum, index: GLuint, buffer: GLuint) {
3213
3214
3215            #[cfg(feature = "debug")] { _gl_print_debug("glBindBufferBase"); }
3216            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3217
3218            if self.glBindBufferBase == ptr::null_mut() {
3219                _gl_impl_panic("glBindBufferBase");
3220                return;
3221            }
3222
3223            unsafe {
3224                let func: extern "system" fn(GLenum, GLuint, GLuint) = mem::transmute(self.glBindBufferBase);
3225                (func)(target, index, buffer);
3226            }
3227        }
3228
3229        $( $opt )? fn bind_buffer_range(
3230            &self,
3231            target: GLenum,
3232            index: GLuint,
3233            buffer: GLuint,
3234            offset: GLintptr,
3235            size: GLsizeiptr,
3236        ) {
3237
3238
3239            #[cfg(feature = "debug")] { _gl_print_debug("glBindBufferRange"); }
3240            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3241
3242            if self.glBindBufferRange == ptr::null_mut() {
3243                _gl_impl_panic("glBindBufferRange");
3244                return;
3245            }
3246
3247            unsafe {
3248                let func: extern "system" fn(GLenum, GLuint, GLuint, GLintptr, GLsizeiptr) = mem::transmute(self.glBindBufferRange);
3249                (func)(target, index, buffer, offset, size);
3250            }
3251        }
3252
3253        $( $opt )? fn uniform_block_binding(
3254            &self,
3255            program: GLuint,
3256            uniform_block_index: GLuint,
3257            uniform_block_binding: GLuint,
3258        ) {
3259
3260
3261            #[cfg(feature = "debug")] { _gl_print_debug("glUniformBlockBinding"); }
3262            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3263
3264            if self.glUniformBlockBinding == ptr::null_mut() {
3265                _gl_impl_panic("glUniformBlockBinding");
3266                return;
3267            }
3268
3269            unsafe {
3270                let func: extern "system" fn(GLuint, GLuint, GLuint) = mem::transmute(self.glUniformBlockBinding);
3271                (func)(program, uniform_block_index, uniform_block_binding);
3272            }
3273        }
3274
3275        $( $opt )? fn bind_buffer(&self, target: GLenum, buffer: GLuint) {
3276
3277
3278            #[cfg(feature = "debug")] { _gl_print_debug("glBindBuffer"); }
3279            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3280
3281            if self.glBindBuffer == ptr::null_mut() {
3282                _gl_impl_panic("glBindBuffer");
3283                return;
3284            }
3285
3286            unsafe {
3287                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindBuffer);
3288                (func)(target, buffer);
3289            }
3290        }
3291
3292        $( $opt )? fn bind_vertex_array(&self, vao: GLuint) {
3293
3294
3295            #[cfg(feature = "debug")] { _gl_print_debug("glBindVertexArray"); }
3296            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3297
3298            if self.glBindVertexArray == ptr::null_mut() {
3299                _gl_impl_panic("glBindVertexArray");
3300                return;
3301            }
3302
3303            unsafe {
3304                let func: extern "system" fn(GLuint) = mem::transmute(self.glBindVertexArray);
3305                (func)(vao);
3306            }
3307        }
3308
3309        $( $opt )? fn bind_vertex_array_apple(&self, vao: GLuint) {
3310
3311
3312            #[cfg(feature = "debug")] { _gl_print_debug("glBindVertexArrayAPPLE"); }
3313            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3314
3315            if self.glBindVertexArrayAPPLE == ptr::null_mut() {
3316                _gl_impl_panic("glBindVertexArrayAPPLE");
3317                return;
3318            }
3319
3320            unsafe {
3321                let func: extern "system" fn(GLuint) = mem::transmute(self.glBindVertexArrayAPPLE);
3322                (func)(vao)
3323            }
3324        }
3325
3326        $( $opt )? fn bind_renderbuffer(&self, target: GLenum, renderbuffer: GLuint) {
3327
3328
3329            #[cfg(feature = "debug")] { _gl_print_debug("glBindRenderbuffer"); }
3330            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3331
3332            if self.glBindRenderbuffer == ptr::null_mut() {
3333                _gl_impl_panic("glBindRenderbuffer");
3334                return;
3335            }
3336
3337            unsafe {
3338                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindRenderbuffer);
3339                (func)(target, renderbuffer);
3340            }
3341        }
3342
3343        $( $opt )? fn bind_framebuffer(&self, target: GLenum, framebuffer: GLuint) {
3344
3345
3346            #[cfg(feature = "debug")] { _gl_print_debug("glBindFramebuffer"); }
3347            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3348
3349            if self.glBindFramebuffer == ptr::null_mut() {
3350                _gl_impl_panic("glBindFramebuffer");
3351                return;
3352            }
3353
3354            unsafe {
3355                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindFramebuffer);
3356                (func)(target, framebuffer);
3357            }
3358        }
3359
3360        $( $opt )? fn bind_texture(&self, target: GLenum, texture: GLuint) {
3361
3362
3363            #[cfg(feature = "debug")] { _gl_print_debug("glBindTexture"); }
3364            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3365
3366            if self.glBindTexture == ptr::null_mut() {
3367                _gl_impl_panic("glBindTexture");
3368                return;
3369            }
3370
3371            unsafe {
3372                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindTexture);
3373                (func)(target, texture);
3374            }
3375        }
3376
3377        $( $opt )? fn draw_buffers(&self, bufs: &[GLenum]) {
3378
3379
3380            #[cfg(feature = "debug")] { _gl_print_debug("glDrawBuffers"); }
3381            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3382
3383            if self.glDrawBuffers == ptr::null_mut() {
3384                _gl_impl_panic("glDrawBuffers");
3385                return;
3386            }
3387
3388            unsafe {
3389                let func: extern "system" fn(GLsizei, *const GLenum) = mem::transmute(self.glDrawBuffers);
3390                (func)(bufs.len() as GLsizei, bufs.as_ptr());
3391            }
3392        }
3393
3394        // FIXME: Does not verify buffer size -- unsafe!
3395        $( $opt )? fn tex_image_2d(
3396            &self,
3397            target: GLenum,
3398            level: GLint,
3399            internal_format: GLint,
3400            width: GLsizei,
3401            height: GLsizei,
3402            border: GLint,
3403            format: GLenum,
3404            ty: GLenum,
3405            opt_data: Option<&[u8]>,
3406        ) {
3407
3408            #[cfg(feature = "debug")] { _gl_print_debug("glTexImage2D"); }
3409            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3410
3411            if self.glTexImage2D == ptr::null_mut() {
3412                _gl_impl_panic("glTexImage2D");
3413                return;
3414            }
3415
3416            unsafe {
3417                let func: extern "system" fn(GLenum, GLint, GLint, GLsizei, GLsizei, GLint, GLenum, GLenum, *const GLvoid) = mem::transmute(self.glTexImage2D);
3418
3419                match opt_data {
3420                    Some(data) => {
3421                        (func)(
3422                            target,
3423                            level,
3424                            internal_format,
3425                            width,
3426                            height,
3427                            border,
3428                            format,
3429                            ty,
3430                            data.as_ptr() as *const GLvoid,
3431                        );
3432                    },
3433                    None => {
3434                        (func)(
3435                            target,
3436                            level,
3437                            internal_format,
3438                            width,
3439                            height,
3440                            border,
3441                            format,
3442                            ty,
3443                            ptr::null(),
3444                        );
3445                    },
3446                }
3447            }
3448        }
3449
3450        $( $opt )? fn compressed_tex_image_2d(
3451            &self,
3452            target: GLenum,
3453            level: GLint,
3454            internal_format: GLenum,
3455            width: GLsizei,
3456            height: GLsizei,
3457            border: GLint,
3458            data: &[u8],
3459        ) {
3460
3461
3462            #[cfg(feature = "debug")] { _gl_print_debug("glCompressedTexImage2D"); }
3463            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3464
3465            if self.glCompressedTexImage2D == ptr::null_mut() {
3466                _gl_impl_panic("glCompressedTexImage2D");
3467                return;
3468            }
3469
3470            unsafe {
3471                let func: extern "system" fn(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, *const GLvoid) = mem::transmute(self.glCompressedTexImage2D);
3472                (func)(
3473                    target,
3474                    level,
3475                    internal_format,
3476                    width,
3477                    height,
3478                    border,
3479                    data.len() as GLsizei,
3480                    data.as_ptr() as *const GLvoid,
3481                );
3482            }
3483        }
3484
3485        $( $opt )? fn compressed_tex_sub_image_2d(
3486            &self,
3487            target: GLenum,
3488            level: GLint,
3489            xoffset: GLint,
3490            yoffset: GLint,
3491            width: GLsizei,
3492            height: GLsizei,
3493            format: GLenum,
3494            data: &[u8],
3495        ) {
3496
3497            #[cfg(feature = "debug")] { _gl_print_debug("glCompressedTexSubImage2D"); }
3498            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3499
3500            if self.glCompressedTexSubImage2D == ptr::null_mut() {
3501                _gl_impl_panic("glCompressedTexSubImage2D");
3502                return;
3503            }
3504
3505            unsafe {
3506                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLsizei, *const GLvoid) = mem::transmute(self.glCompressedTexSubImage2D);
3507                (func)(
3508                    target,
3509                    level,
3510                    xoffset,
3511                    yoffset,
3512                    width,
3513                    height,
3514                    format,
3515                    data.len() as GLsizei,
3516                    data.as_ptr() as *const GLvoid,
3517                );
3518            }
3519        }
3520
3521        // FIXME: Does not verify buffer size -- unsafe!
3522        $( $opt )? fn tex_image_3d(
3523            &self,
3524            target: GLenum,
3525            level: GLint,
3526            internal_format: GLint,
3527            width: GLsizei,
3528            height: GLsizei,
3529            depth: GLsizei,
3530            border: GLint,
3531            format: GLenum,
3532            ty: GLenum,
3533            opt_data: Option<&[u8]>,
3534        ) {
3535
3536            #[cfg(feature = "debug")] { _gl_print_debug("glTexImage3D"); }
3537            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3538
3539            if self.glTexImage3D == ptr::null_mut() {
3540                _gl_impl_panic("glTexImage3D");
3541                return;
3542            }
3543
3544            unsafe {
3545                let pdata = match opt_data {
3546                    Some(data) => mem::transmute(data.as_ptr()),
3547                    None => ptr::null(),
3548                };
3549                let func: extern "system" fn(GLenum, GLint, GLint, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, *const GLvoid) = mem::transmute(self.glTexImage3D);
3550                (func)(
3551                    target,
3552                    level,
3553                    internal_format,
3554                    width,
3555                    height,
3556                    depth,
3557                    border,
3558                    format,
3559                    ty,
3560                    pdata,
3561                );
3562            }
3563        }
3564
3565        $( $opt )? fn copy_tex_image_2d(
3566            &self,
3567            target: GLenum,
3568            level: GLint,
3569            internal_format: GLenum,
3570            x: GLint,
3571            y: GLint,
3572            width: GLsizei,
3573            height: GLsizei,
3574            border: GLint,
3575        ) {
3576
3577            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexImage2D"); }
3578            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3579
3580            if self.glCopyTexImage2D == ptr::null_mut() {
3581                _gl_impl_panic("glCopyTexImage2D");
3582                return;
3583            }
3584
3585            unsafe {
3586                let func: extern "system" fn(GLenum,GLint,GLenum,GLint,GLint,GLsizei,GLsizei,GLint) = mem::transmute(self.glCopyTexImage2D);
3587                (func)(
3588                    target,
3589                    level,
3590                    internal_format,
3591                    x,
3592                    y,
3593                    width,
3594                    height,
3595                    border,
3596                );
3597            }
3598        }
3599
3600        $( $opt )? fn copy_tex_sub_image_2d(
3601            &self,
3602            target: GLenum,
3603            level: GLint,
3604            xoffset: GLint,
3605            yoffset: GLint,
3606            x: GLint,
3607            y: GLint,
3608            width: GLsizei,
3609            height: GLsizei,
3610        ) {
3611
3612            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexSubImage2D"); }
3613            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3614
3615            if self.glCopyTexSubImage2D == ptr::null_mut() {
3616                _gl_impl_panic("glCopyTexSubImage2D");
3617                return;
3618            }
3619
3620            unsafe {
3621                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glCopyTexSubImage2D);
3622                (func)(target, level, xoffset, yoffset, x, y, width, height);
3623            }
3624        }
3625
3626        $( $opt )? fn copy_tex_sub_image_3d(
3627            &self,
3628            target: GLenum,
3629            level: GLint,
3630            xoffset: GLint,
3631            yoffset: GLint,
3632            zoffset: GLint,
3633            x: GLint,
3634            y: GLint,
3635            width: GLsizei,
3636            height: GLsizei,
3637        ) {
3638
3639            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexSubImage3D"); }
3640            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3641
3642            if self.glCopyTexSubImage3D == ptr::null_mut() {
3643                _gl_impl_panic("glCopyTexSubImage3D");
3644                return;
3645            }
3646
3647            unsafe {
3648                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glCopyTexSubImage3D);
3649                (func)(
3650                    target, level, xoffset, yoffset, zoffset, x, y, width, height,
3651                );
3652            }
3653        }
3654
3655        $( $opt )? fn tex_sub_image_2d(
3656            &self,
3657            target: GLenum,
3658            level: GLint,
3659            xoffset: GLint,
3660            yoffset: GLint,
3661            width: GLsizei,
3662            height: GLsizei,
3663            format: GLenum,
3664            ty: GLenum,
3665            data: &[u8],
3666        ) {
3667
3668            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage2D"); }
3669            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3670
3671            if self.glTexSubImage2D == ptr::null_mut() {
3672                _gl_impl_panic("glTexSubImage2D");
3673                return;
3674            }
3675
3676            unsafe {
3677                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage2D);
3678                (func)(
3679                    target,
3680                    level,
3681                    xoffset,
3682                    yoffset,
3683                    width,
3684                    height,
3685                    format,
3686                    ty,
3687                    data.as_ptr() as *const c_void,
3688                );
3689            }
3690        }
3691
3692        $( $opt )? fn tex_sub_image_2d_pbo(
3693            &self,
3694            target: GLenum,
3695            level: GLint,
3696            xoffset: GLint,
3697            yoffset: GLint,
3698            width: GLsizei,
3699            height: GLsizei,
3700            format: GLenum,
3701            ty: GLenum,
3702            offset: usize,
3703        ) {
3704
3705            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage2D"); }
3706            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3707
3708            if self.glTexSubImage2D == ptr::null_mut() {
3709                _gl_impl_panic("glTexSubImage2D");
3710                return;
3711            }
3712
3713            unsafe {
3714                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage2D);
3715                (func)(
3716                    target,
3717                    level,
3718                    xoffset,
3719                    yoffset,
3720                    width,
3721                    height,
3722                    format,
3723                    ty,
3724                    offset as *const c_void,
3725                );
3726            }
3727        }
3728
3729        $( $opt )? fn tex_sub_image_3d(
3730            &self,
3731            target: GLenum,
3732            level: GLint,
3733            xoffset: GLint,
3734            yoffset: GLint,
3735            zoffset: GLint,
3736            width: GLsizei,
3737            height: GLsizei,
3738            depth: GLsizei,
3739            format: GLenum,
3740            ty: GLenum,
3741            data: &[u8],
3742        ) {
3743
3744            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage3D"); }
3745            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3746
3747            if self.glTexSubImage3D == ptr::null_mut() {
3748                _gl_impl_panic("glTexSubImage3D");
3749                return;
3750            }
3751
3752            unsafe {
3753                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage3D);
3754                (func)(
3755                    target,
3756                    level,
3757                    xoffset,
3758                    yoffset,
3759                    zoffset,
3760                    width,
3761                    height,
3762                    depth,
3763                    format,
3764                    ty,
3765                    data.as_ptr() as *const c_void,
3766                );
3767            }
3768        }
3769
3770        $( $opt )? fn tex_sub_image_3d_pbo(
3771            &self,
3772            target: GLenum,
3773            level: GLint,
3774            xoffset: GLint,
3775            yoffset: GLint,
3776            zoffset: GLint,
3777            width: GLsizei,
3778            height: GLsizei,
3779            depth: GLsizei,
3780            format: GLenum,
3781            ty: GLenum,
3782            offset: usize,
3783        ) {
3784
3785            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage3D"); }
3786            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3787
3788            if self.glTexSubImage3D == ptr::null_mut() {
3789                _gl_impl_panic("glTexSubImage3D");
3790                return;
3791            }
3792
3793            unsafe {
3794                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage3D);
3795                (func)(
3796                    target,
3797                    level,
3798                    xoffset,
3799                    yoffset,
3800                    zoffset,
3801                    width,
3802                    height,
3803                    depth,
3804                    format,
3805                    ty,
3806                    offset as *const c_void,
3807                );
3808            }
3809        }
3810
3811        $( $opt )? fn tex_storage_2d(
3812            &self,
3813            target: GLenum,
3814            levels: GLint,
3815            internal_format: GLenum,
3816            width: GLsizei,
3817            height: GLsizei,
3818        ) {
3819
3820            #[cfg(feature = "debug")] { _gl_print_debug("glTexStorage2D"); }
3821            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3822
3823            if self.glTexStorage2D == ptr::null_mut() {
3824                _gl_impl_panic("glTexStorage2D");
3825                return;
3826            }
3827
3828            unsafe {
3829                let func: extern "system" fn(GLenum, GLsizei, GLenum, GLsizei, GLsizei) = mem::transmute(self.glTexStorage2D);
3830                (func)(target, levels, internal_format, width, height);
3831            }
3832        }
3833
3834        $( $opt )? fn tex_storage_3d(
3835            &self,
3836            target: GLenum,
3837            levels: GLint,
3838            internal_format: GLenum,
3839            width: GLsizei,
3840            height: GLsizei,
3841            depth: GLsizei,
3842        ) {
3843
3844            #[cfg(feature = "debug")] { _gl_print_debug("glTexStorage3D"); }
3845            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3846
3847            if self.glTexStorage3D == ptr::null_mut() {
3848                _gl_impl_panic("glTexStorage3D");
3849                return;
3850            }
3851
3852            unsafe {
3853                let func: extern "system" fn(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei) = mem::transmute(self.glTexStorage3D);
3854                (func)(target, levels, internal_format, width, height, depth);
3855            }
3856        }
3857
3858        $( $opt )? fn get_tex_image_into_buffer(
3859            &self,
3860            target: GLenum,
3861            level: GLint,
3862            format: GLenum,
3863            ty: GLenum,
3864            output: &mut [u8],
3865        ) {
3866
3867            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexImage"); }
3868            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3869
3870            if self.glGetTexImage == ptr::null_mut() {
3871                _gl_impl_panic("glGetTexImage");
3872                return;
3873            }
3874
3875            unsafe {
3876                let func: extern "system" fn(GLenum, GLint, GLenum, GLenum, *mut GLvoid) = mem::transmute(self.glGetTexImage);
3877                (func)(target, level, format, ty, output.as_mut_ptr() as *mut _);
3878            }
3879        }
3880
3881        $( $opt )? unsafe fn copy_image_sub_data(
3882            &self,
3883            src_name: GLuint,
3884            src_target: GLenum,
3885            src_level: GLint,
3886            src_x: GLint,
3887            src_y: GLint,
3888            src_z: GLint,
3889            dst_name: GLuint,
3890            dst_target: GLenum,
3891            dst_level: GLint,
3892            dst_x: GLint,
3893            dst_y: GLint,
3894            dst_z: GLint,
3895            src_width: GLsizei,
3896            src_height: GLsizei,
3897            src_depth: GLsizei,
3898        ) {
3899
3900            #[cfg(feature = "debug")] { _gl_print_debug("glCopyImageSubData"); }
3901            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3902
3903            if self.glCopyImageSubData == ptr::null_mut() {
3904                _gl_impl_panic("glCopyImageSubData");
3905                return;
3906            }
3907
3908            let func: extern "system" fn(GLuint, GLenum, GLint, GLint, GLint, GLint, GLuint, GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei) = mem::transmute(self.glCopyImageSubData);
3909            (func)(
3910                src_name, src_target, src_level, src_x, src_y, src_z, dst_name, dst_target, dst_level,
3911                dst_x, dst_y, dst_z, src_width, src_height, src_depth,
3912            );
3913        }
3914
3915        $( $opt )? fn invalidate_framebuffer(&self, target: GLenum, attachments: &[GLenum]) {
3916
3917
3918            #[cfg(feature = "debug")] { _gl_print_debug("glInvalidateFramebuffer"); }
3919            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3920
3921            if self.glInvalidateFramebuffer == ptr::null_mut() {
3922                _gl_impl_panic("glInvalidateFramebuffer");
3923                return;
3924            }
3925
3926            unsafe {
3927                let func: extern "system" fn(GLenum, GLsizei, *const GLenum) = mem::transmute(self.glInvalidateFramebuffer);
3928                (func)(
3929                    target,
3930                    attachments.len() as GLsizei,
3931                    attachments.as_ptr(),
3932                );
3933            }
3934        }
3935
3936        $( $opt )? fn invalidate_sub_framebuffer(
3937            &self,
3938            target: GLenum,
3939            attachments: &[GLenum],
3940            xoffset: GLint,
3941            yoffset: GLint,
3942            width: GLsizei,
3943            height: GLsizei,
3944        ) {
3945
3946
3947            #[cfg(feature = "debug")] { _gl_print_debug("glInvalidateSubFramebuffer"); }
3948            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3949
3950            if self.glInvalidateSubFramebuffer == ptr::null_mut() {
3951                _gl_impl_panic("glInvalidateSubFramebuffer");
3952                return;
3953            }
3954
3955            unsafe {
3956                let func: extern "system" fn(GLenum, GLsizei, *const GLenum, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glInvalidateSubFramebuffer);
3957                (func)(
3958                    target,
3959                    attachments.len() as GLsizei,
3960                    attachments.as_ptr(),
3961                    xoffset,
3962                    yoffset,
3963                    width,
3964                    height,
3965                );
3966            }
3967        }
3968
3969        $( $opt )? unsafe fn get_integer_v(&self, name: GLenum, result: &mut [GLint]) {
3970
3971            #[cfg(feature = "debug")] { _gl_print_debug("glGetIntegerv"); }
3972            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3973
3974            if self.glGetIntegerv == ptr::null_mut() {
3975                _gl_impl_panic("glGetIntegerv");
3976                return;
3977            }
3978
3979            let func: extern "system" fn(GLenum, *mut GLint) = mem::transmute(self.glGetIntegerv);
3980            (func)(name, result.as_mut_ptr());
3981        }
3982
3983        $( $opt )? unsafe fn get_integer_64v(&self, name: GLenum, result: &mut [GLint64]) {
3984
3985            #[cfg(feature = "debug")] { _gl_print_debug("glGetInteger64v"); }
3986            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3987
3988            if self.glGetInteger64v == ptr::null_mut() {
3989                _gl_impl_panic("glGetInteger64v");
3990                return;
3991            }
3992            let func: extern "system" fn(GLenum, *mut GLint64) = mem::transmute(self.glGetInteger64v);
3993            (func)(name, result.as_mut_ptr());
3994        }
3995
3996        $( $opt )? unsafe fn get_integer_iv(&self, name: GLenum, index: GLuint, result: &mut [GLint]) {
3997
3998            #[cfg(feature = "debug")] { _gl_print_debug("glGetIntegeri_v"); }
3999            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4000
4001            if self.glGetIntegeri_v == ptr::null_mut() {
4002                _gl_impl_panic("glGetIntegeri_v");
4003                return;
4004            }
4005            let func: extern "system" fn(GLenum, GLuint, *mut GLint) = mem::transmute(self.glGetIntegeri_v);
4006            (func)(name, index, result.as_mut_ptr());
4007        }
4008
4009        #[inline]
4010        $( $opt )? unsafe fn get_integer_64iv(&self, name: GLenum, index: GLuint, result: &mut [GLint64]) {
4011
4012            #[cfg(feature = "debug")] { _gl_print_debug("glGetInteger64i_v"); }
4013            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4014
4015            if self.glGetInteger64i_v == ptr::null_mut() {
4016                _gl_impl_panic("glGetInteger64i_v");
4017                return;
4018            }
4019            let func: extern "system" fn(GLenum, GLuint, *mut GLint64) = mem::transmute(self.glGetInteger64i_v);
4020            (func)(name, index, result.as_mut_ptr());
4021        }
4022
4023        #[inline]
4024        $( $opt )? unsafe fn get_boolean_v(&self, name: GLenum, result: &mut [GLboolean]) {
4025
4026            #[cfg(feature = "debug")] { _gl_print_debug("glGetBooleanv"); }
4027            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4028
4029            if self.glGetBooleanv == ptr::null_mut() {
4030                _gl_impl_panic("glGetBooleanv");
4031                return;
4032            }
4033            let func: extern "system" fn(GLenum, *mut GLboolean) = mem::transmute(self.glGetBooleanv);
4034            (func)(name, result.as_mut_ptr());
4035        }
4036
4037        #[inline]
4038        $( $opt )? unsafe fn get_float_v(&self, name: GLenum, result: &mut [GLfloat]) {
4039
4040            #[cfg(feature = "debug")] { _gl_print_debug("glGetFloatv"); }
4041            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4042
4043            if self.glGetFloatv == ptr::null_mut() {
4044                _gl_impl_panic("glGetFloatv");
4045                return;
4046            }
4047            let func: extern "system" fn(GLenum, *mut GLfloat) = mem::transmute(self.glGetFloatv);
4048            (func)(name, result.as_mut_ptr());
4049        }
4050
4051        $( $opt )? fn get_framebuffer_attachment_parameter_iv(
4052            &self,
4053            target: GLenum,
4054            attachment: GLenum,
4055            pname: GLenum,
4056        ) -> GLint {
4057
4058            #[cfg(feature = "debug")] { _gl_print_debug("glGetFramebufferAttachmentParameteriv"); }
4059            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4060
4061            if self.glGetFramebufferAttachmentParameteriv == ptr::null_mut() {
4062                _gl_impl_panic("glGetFramebufferAttachmentParameteriv");
4063                return 0;
4064            }
4065            let mut result: GLint = 0;
4066            unsafe {
4067                let func: extern "system" fn(GLenum, GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetFramebufferAttachmentParameteriv);
4068                (func)(
4069                    target,
4070                    attachment,
4071                    pname,
4072                    &mut result,
4073                );
4074            }
4075            result
4076        }
4077
4078        $( $opt )? fn get_renderbuffer_parameter_iv(&self, target: GLenum, pname: GLenum) -> GLint {
4079
4080            #[cfg(feature = "debug")] { _gl_print_debug("glGetRenderbufferParameteriv"); }
4081            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4082
4083            if self.glGetRenderbufferParameteriv == ptr::null_mut() {
4084                _gl_impl_panic("glGetRenderbufferParameteriv");
4085                return 0;
4086            }
4087
4088            let mut result: GLint = 0;
4089            unsafe {
4090                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetRenderbufferParameteriv);
4091                (func)(target, pname, &mut result);
4092            }
4093            result
4094        }
4095
4096        $( $opt )? fn get_tex_parameter_iv(&self, target: GLenum, pname: GLenum) -> GLint {
4097
4098
4099            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexParameteriv"); }
4100            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4101
4102            if self.glGetTexParameteriv == ptr::null_mut() {
4103                _gl_impl_panic("glGetTexParameteriv");
4104                return 0;
4105            }
4106
4107            let mut result: GLint = 0;
4108            unsafe {
4109                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetTexParameteriv);
4110                (func)(target, pname, &mut result);
4111            }
4112            result
4113        }
4114
4115        $( $opt )? fn get_tex_parameter_fv(&self, target: GLenum, pname: GLenum) -> GLfloat {
4116
4117
4118            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexParameterfv"); }
4119            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4120
4121            if self.glGetTexParameterfv == ptr::null_mut() {
4122                _gl_impl_panic("glGetTexParameterfv");
4123                return 0.0;
4124            }
4125
4126            let mut result: GLfloat = 0.0;
4127            unsafe {
4128                let func: extern "system" fn(GLenum, GLenum, *mut GLfloat) = mem::transmute(self.glGetTexParameterfv);
4129                (func)(target, pname, &mut result);
4130            }
4131            result
4132        }
4133
4134        $( $opt )? fn tex_parameter_i(&self, target: GLenum, pname: GLenum, param: GLint) {
4135
4136
4137            #[cfg(feature = "debug")] { _gl_print_debug("glTexParameteri"); }
4138            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4139
4140            if self.glTexParameteri == ptr::null_mut() {
4141                _gl_impl_panic("glTexParameteri");
4142                return;
4143            }
4144
4145            unsafe {
4146                let func: extern "system" fn(GLenum, GLenum, GLint) = mem::transmute(self.glTexParameteri);
4147                (func)(target, pname, param);
4148            }
4149        }
4150
4151        $( $opt )? fn tex_parameter_f(&self, target: GLenum, pname: GLenum, param: GLfloat) {
4152
4153
4154            #[cfg(feature = "debug")] { _gl_print_debug("glTexParameterf"); }
4155            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4156
4157            if self.glTexParameterf == ptr::null_mut() {
4158                _gl_impl_panic("glTexParameterf");
4159                return;
4160            }
4161
4162            unsafe {
4163                let func: extern "system" fn(GLenum, GLenum, GLfloat) = mem::transmute(self.glTexParameterf);
4164                (func)(target, pname, param);
4165            }
4166        }
4167
4168        $( $opt )? fn framebuffer_texture_2d(
4169            &self,
4170            target: GLenum,
4171            attachment: GLenum,
4172            textarget: GLenum,
4173            texture: GLuint,
4174            level: GLint,
4175        ) {
4176
4177
4178            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferTexture2D"); }
4179            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4180
4181            if self.glFramebufferTexture2D == ptr::null_mut() {
4182                _gl_impl_panic("glFramebufferTexture2D");
4183                return;
4184            }
4185
4186            unsafe {
4187                let func: extern "system" fn(GLenum, GLenum, GLenum, GLuint, GLint) = mem::transmute(self.glFramebufferTexture2D);
4188                (func)(target, attachment, textarget, texture, level);
4189            }
4190        }
4191
4192        $( $opt )? fn framebuffer_texture_layer(
4193            &self,
4194            target: GLenum,
4195            attachment: GLenum,
4196            texture: GLuint,
4197            level: GLint,
4198            layer: GLint,
4199        ) {
4200
4201            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferTextureLayer"); }
4202            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4203
4204            if self.glFramebufferTextureLayer == ptr::null_mut() {
4205                _gl_impl_panic("glFramebufferTextureLayer");
4206                return;
4207            }
4208
4209            unsafe {
4210                let func: extern "system" fn(GLenum, GLenum, GLuint, GLint, GLint) = mem::transmute(self.glFramebufferTextureLayer);
4211                (func)(target, attachment, texture, level, layer);
4212            }
4213        }
4214
4215        $( $opt )? fn blit_framebuffer(
4216            &self,
4217            src_x0: GLint,
4218            src_y0: GLint,
4219            src_x1: GLint,
4220            src_y1: GLint,
4221            dst_x0: GLint,
4222            dst_y0: GLint,
4223            dst_x1: GLint,
4224            dst_y1: GLint,
4225            mask: GLbitfield,
4226            filter: GLenum,
4227        ) {
4228
4229            #[cfg(feature = "debug")] { _gl_print_debug("glBlitFramebuffer"); }
4230            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4231
4232            if self.glBlitFramebuffer == ptr::null_mut() {
4233                _gl_impl_panic("glBlitFramebuffer");
4234                return;
4235            }
4236
4237            unsafe {
4238                let func: extern "system" fn(GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum) = mem::transmute(self.glBlitFramebuffer);
4239                (func)(
4240                    src_x0, src_y0, src_x1, src_y1, dst_x0, dst_y0, dst_x1, dst_y1, mask, filter,
4241                );
4242            }
4243        }
4244
4245        $( $opt )? fn vertex_attrib_4f(&self, index: GLuint, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat) {
4246
4247            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttrib4f"); }
4248            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4249
4250            if self.glVertexAttrib4f == ptr::null_mut() {
4251                _gl_impl_panic("glVertexAttrib4f");
4252                return;
4253            }
4254
4255            unsafe {
4256                let func: extern "system" fn(GLuint, GLfloat, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glVertexAttrib4f);
4257                (func)(index, x, y, z, w)
4258            }
4259        }
4260
4261        $( $opt )? fn vertex_attrib_pointer_f32(
4262            &self,
4263            index: GLuint,
4264            size: GLint,
4265            normalized: bool,
4266            stride: GLsizei,
4267            offset: GLuint,
4268        ) {
4269
4270            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribPointer"); }
4271            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4272
4273            if self.glVertexAttribPointer == ptr::null_mut() {
4274                _gl_impl_panic("glVertexAttribPointer");
4275                return;
4276            }
4277
4278            unsafe {
4279                let func: extern "system" fn(GLuint, GLint, GLenum, GLboolean, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribPointer);
4280                (func)(
4281                    index,
4282                    size,
4283                    gl::FLOAT,
4284                    normalized as GLboolean,
4285                    stride,
4286                    offset as *const GLvoid,
4287                )
4288            }
4289        }
4290
4291        $( $opt )? fn vertex_attrib_pointer(
4292            &self,
4293            index: GLuint,
4294            size: GLint,
4295            type_: GLenum,
4296            normalized: bool,
4297            stride: GLsizei,
4298            offset: GLuint,
4299        ) {
4300
4301            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribPointer"); }
4302            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4303
4304            if self.glVertexAttribPointer == ptr::null_mut() {
4305                _gl_impl_panic("glVertexAttribPointer");
4306                return;
4307            }
4308
4309            unsafe {
4310                let func: extern "system" fn(GLuint, GLint, GLenum, GLboolean, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribPointer);
4311                (func)(
4312                    index,
4313                    size,
4314                    type_,
4315                    normalized as GLboolean,
4316                    stride,
4317                    offset as *const GLvoid,
4318                )
4319            }
4320        }
4321
4322        $( $opt )? fn vertex_attrib_i_pointer(
4323            &self,
4324            index: GLuint,
4325            size: GLint,
4326            type_: GLenum,
4327            stride: GLsizei,
4328            offset: GLuint,
4329        ) {
4330
4331            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribIPointer"); }
4332            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4333
4334            if self.glVertexAttribIPointer == ptr::null_mut() {
4335                _gl_impl_panic("glVertexAttribIPointer");
4336                return;
4337            }
4338
4339            unsafe {
4340                let func: extern "system" fn(GLuint, GLint, GLenum, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribIPointer);
4341                (func)(index, size, type_, stride, offset as *const GLvoid)
4342            }
4343        }
4344
4345        $( $opt )? fn vertex_attrib_divisor(&self, index: GLuint, divisor: GLuint) {
4346
4347
4348            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribDivisor"); }
4349            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4350
4351            if self.glVertexAttribDivisor == ptr::null_mut() {
4352                _gl_impl_panic("glVertexAttribDivisor");
4353                return;
4354            }
4355
4356            unsafe {
4357                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glVertexAttribDivisor);
4358                (func)(index, divisor)
4359            }
4360        }
4361
4362        $( $opt )? fn viewport(&self, x: GLint, y: GLint, width: GLsizei, height: GLsizei) {
4363
4364
4365            #[cfg(feature = "debug")] { _gl_print_debug("glViewport"); }
4366            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4367
4368            if self.glViewport == ptr::null_mut() {
4369                _gl_impl_panic("glViewport");
4370                return;
4371            }
4372
4373            unsafe {
4374                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glViewport);
4375                (func)(x, y, width, height);
4376            }
4377        }
4378
4379        $( $opt )? fn scissor(&self, x: GLint, y: GLint, width: GLsizei, height: GLsizei) {
4380
4381
4382            #[cfg(feature = "debug")] { _gl_print_debug("glScissor"); }
4383            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4384
4385            if self.glScissor == ptr::null_mut() {
4386                _gl_impl_panic("glScissor");
4387                return;
4388            }
4389
4390            unsafe {
4391                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glScissor);
4392                (func)(x, y, width, height);
4393            }
4394        }
4395
4396        $( $opt )? fn line_width(&self, width: GLfloat) {
4397
4398
4399            #[cfg(feature = "debug")] { _gl_print_debug("glLineWidth"); }
4400            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4401
4402            if self.glLineWidth == ptr::null_mut() {
4403                _gl_impl_panic("glLineWidth");
4404                return;
4405            }
4406
4407            unsafe {
4408                let func: extern "system" fn(GLfloat) = mem::transmute(self.glLineWidth);
4409                (func)(width);
4410            }
4411        }
4412
4413        $( $opt )? fn use_program(&self, program: GLuint) {
4414
4415
4416            #[cfg(feature = "debug")] { _gl_print_debug("glUseProgram"); }
4417            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4418
4419            if self.glUseProgram == ptr::null_mut() {
4420                _gl_impl_panic("glUseProgram");
4421                return;
4422            }
4423
4424            unsafe {
4425                let func: extern "system" fn(GLuint) = mem::transmute(self.glUseProgram);
4426                (func)(program);
4427            }
4428        }
4429
4430        $( $opt )? fn validate_program(&self, program: GLuint) {
4431
4432
4433            #[cfg(feature = "debug")] { _gl_print_debug("glValidateProgram"); }
4434            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4435
4436            if self.glValidateProgram == ptr::null_mut() {
4437                _gl_impl_panic("glValidateProgram");
4438                return;
4439            }
4440
4441            unsafe {
4442                let func: extern "system" fn(GLuint) = mem::transmute(self.glValidateProgram);
4443                (func)(program);
4444            }
4445        }
4446
4447        $( $opt )? fn draw_arrays(&self, mode: GLenum, first: GLint, count: GLsizei) {
4448
4449
4450            #[cfg(feature = "debug")] { _gl_print_debug("glDrawArrays"); }
4451            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4452
4453            if self.glDrawArrays == ptr::null_mut() {
4454                _gl_impl_panic("glDrawArrays");
4455                return;
4456            }
4457
4458            unsafe {
4459                let func: extern "system" fn(GLenum, GLint, GLsizei) = mem::transmute(self.glDrawArrays);
4460                return (func)(mode, first, count);
4461            }
4462        }
4463
4464        $( $opt )? fn draw_arrays_instanced(
4465            &self,
4466            mode: GLenum,
4467            first: GLint,
4468            count: GLsizei,
4469            primcount: GLsizei,
4470        ) {
4471
4472
4473            #[cfg(feature = "debug")] { _gl_print_debug("glDrawArraysInstanced"); }
4474            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4475
4476            if self.glDrawArraysInstanced == ptr::null_mut() {
4477                _gl_impl_panic("glDrawArraysInstanced");
4478                return;
4479            }
4480
4481            unsafe {
4482                let func: extern "system" fn(GLenum,GLint,GLsizei,GLsizei) = mem::transmute(self.glDrawArraysInstanced);
4483                return (func)(mode, first, count, primcount);
4484            }
4485        }
4486
4487        $( $opt )? fn draw_elements(
4488            &self,
4489            mode: GLenum,
4490            count: GLsizei,
4491            element_type: GLenum,
4492            indices_offset: GLuint,
4493        ) {
4494
4495            #[cfg(feature = "debug")] { _gl_print_debug("glDrawElements"); }
4496            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4497
4498            if self.glDrawElements == ptr::null_mut() {
4499                _gl_impl_panic("glDrawElements");
4500                return;
4501            }
4502
4503            unsafe {
4504                let func: extern "system" fn(GLenum, GLsizei, GLenum, *const c_void) = mem::transmute(self.glDrawElements);
4505                return (func)(
4506                    mode,
4507                    count,
4508                    element_type,
4509                    indices_offset as *const c_void,
4510                );
4511            }
4512        }
4513
4514        $( $opt )? fn draw_elements_instanced(
4515            &self,
4516            mode: GLenum,
4517            count: GLsizei,
4518            element_type: GLenum,
4519            indices_offset: GLuint,
4520            primcount: GLsizei,
4521        ) {
4522
4523            #[cfg(feature = "debug")] { _gl_print_debug("glDrawElementsInstanced"); }
4524            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4525
4526            if self.glDrawElementsInstanced == ptr::null_mut() {
4527                _gl_impl_panic("glDrawElementsInstanced");
4528                return;
4529            }
4530
4531            unsafe {
4532                let func: extern "system" fn(GLenum, GLsizei, GLenum, *const c_void, GLsizei) = mem::transmute(self.glDrawElementsInstanced);
4533                return (func)(
4534                    mode,
4535                    count,
4536                    element_type,
4537                    indices_offset as *const c_void,
4538                    primcount,
4539                );
4540            }
4541        }
4542
4543        $( $opt )? fn blend_color(&self, r: f32, g: f32, b: f32, a: f32) {
4544
4545
4546            #[cfg(feature = "debug")] { _gl_print_debug("glBlendColor"); }
4547            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4548
4549            if self.glBlendColor == ptr::null_mut() {
4550                _gl_impl_panic("glBlendColor");
4551                return;
4552            }
4553
4554            unsafe {
4555                let func: extern "system" fn(GLclampf, GLclampf, GLclampf, GLclampf) = mem::transmute(self.glBlendColor);
4556                (func)(r, g, b, a);
4557            }
4558        }
4559
4560        $( $opt )? fn blend_func(&self, sfactor: GLenum, dfactor: GLenum) {
4561
4562
4563            #[cfg(feature = "debug")] { _gl_print_debug("glBlendFunc"); }
4564            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4565
4566            if self.glBlendFunc == ptr::null_mut() {
4567                _gl_impl_panic("glBlendFunc");
4568                return;
4569            }
4570
4571            unsafe {
4572                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glBlendFunc);
4573                (func)(sfactor, dfactor);
4574            }
4575        }
4576
4577        $( $opt )? fn blend_func_separate(
4578            &self,
4579            src_rgb: GLenum,
4580            dest_rgb: GLenum,
4581            src_alpha: GLenum,
4582            dest_alpha: GLenum,
4583        ) {
4584
4585            #[cfg(feature = "debug")] { _gl_print_debug("glBlendFuncSeparate"); }
4586            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4587
4588            if self.glBlendFuncSeparate == ptr::null_mut() {
4589                _gl_impl_panic("glBlendFuncSeparate");
4590                return;
4591            }
4592
4593            unsafe {
4594                let func: extern "system" fn(GLenum, GLenum, GLenum, GLenum) = mem::transmute(self.glBlendFuncSeparate);
4595                (func)(src_rgb, dest_rgb, src_alpha, dest_alpha);
4596            }
4597        }
4598
4599        $( $opt )? fn blend_equation(&self, mode: GLenum) {
4600
4601
4602            #[cfg(feature = "debug")] { _gl_print_debug("glBlendEquation"); }
4603            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4604
4605            if self.glBlendEquation == ptr::null_mut() {
4606                _gl_impl_panic("glBlendEquation");
4607                return;
4608            }
4609
4610            unsafe {
4611                let func: extern "system" fn(GLenum) = mem::transmute(self.glBlendEquation);
4612                (func)(mode);
4613            }
4614        }
4615
4616        $( $opt )? fn blend_equation_separate(&self, mode_rgb: GLenum, mode_alpha: GLenum) {
4617
4618
4619            #[cfg(feature = "debug")] { _gl_print_debug("glBlendEquationSeparate"); }
4620            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4621
4622            if self.glBlendEquationSeparate == ptr::null_mut() {
4623                _gl_impl_panic("glBlendEquationSeparate");
4624                return;
4625            }
4626
4627            unsafe {
4628                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glBlendEquationSeparate);
4629                (func)(mode_rgb, mode_alpha);
4630            }
4631        }
4632
4633        $( $opt )? fn color_mask(&self, r: bool, g: bool, b: bool, a: bool) {
4634
4635
4636            #[cfg(feature = "debug")] { _gl_print_debug("glColorMask"); }
4637            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4638
4639            if self.glColorMask == ptr::null_mut() {
4640                _gl_impl_panic("glColorMask");
4641                return;
4642            }
4643
4644            unsafe {
4645                let func: extern "system" fn(GLboolean, GLboolean, GLboolean, GLboolean) = mem::transmute(self.glColorMask);
4646                (func)(
4647                    r as GLboolean,
4648                    g as GLboolean,
4649                    b as GLboolean,
4650                    a as GLboolean,
4651                );
4652            }
4653        }
4654
4655        $( $opt )? fn cull_face(&self, mode: GLenum) {
4656
4657
4658            #[cfg(feature = "debug")] { _gl_print_debug("glCullFace"); }
4659            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4660
4661            if self.glCullFace == ptr::null_mut() {
4662                _gl_impl_panic("glCullFace");
4663                return;
4664            }
4665
4666            unsafe {
4667                let func: extern "system" fn(GLenum) = mem::transmute(self.glCullFace);
4668                (func)(mode);
4669            }
4670        }
4671
4672        $( $opt )? fn front_face(&self, mode: GLenum) {
4673
4674
4675            #[cfg(feature = "debug")] { _gl_print_debug("glFrontFace"); }
4676            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4677
4678            if self.glFrontFace == ptr::null_mut() {
4679                _gl_impl_panic("glFrontFace");
4680                return;
4681            }
4682
4683            unsafe {
4684                let func: extern "system" fn(GLenum) = mem::transmute(self.glFrontFace);
4685                (func)(mode);
4686            }
4687        }
4688
4689        $( $opt )? fn enable(&self, cap: GLenum) {
4690
4691
4692            #[cfg(feature = "debug")] { _gl_print_debug("glEnable"); }
4693            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4694
4695            if self.glEnable == ptr::null_mut() {
4696                _gl_impl_panic("glEnable");
4697                return;
4698            }
4699
4700            unsafe {
4701                let func: extern "system" fn(GLenum) = mem::transmute(self.glEnable);
4702                (func)(cap);
4703            }
4704        }
4705
4706        $( $opt )? fn disable(&self, cap: GLenum) {
4707
4708
4709            #[cfg(feature = "debug")] { _gl_print_debug("glDisable"); }
4710            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4711
4712            if self.glDisable == ptr::null_mut() {
4713                _gl_impl_panic("glDisable");
4714                return;
4715            }
4716
4717            unsafe {
4718                let func: extern "system" fn(GLenum) = mem::transmute(self.glDisable);
4719                (func)(cap);
4720            }
4721        }
4722
4723        $( $opt )? fn hint(&self, param_name: GLenum, param_val: GLenum) {
4724
4725
4726            #[cfg(feature = "debug")] { _gl_print_debug("glHint"); }
4727            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4728
4729            if self.glHint == ptr::null_mut() {
4730                _gl_impl_panic("glHint");
4731                return;
4732            }
4733
4734            unsafe {
4735                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glHint);
4736                (func)(param_name, param_val);
4737            }
4738        }
4739
4740        $( $opt )? fn is_enabled(&self, cap: GLenum) -> GLboolean {
4741
4742
4743            #[cfg(feature = "debug")] { _gl_print_debug("glIsEnabled"); }
4744            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4745
4746            if self.glIsEnabled == ptr::null_mut() {
4747                _gl_impl_panic("glIsEnabled");
4748                return 0;
4749            }
4750
4751            unsafe {
4752                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsEnabled);
4753                (func)(cap)
4754            }
4755        }
4756
4757        $( $opt )? fn is_shader(&self, shader: GLuint) -> GLboolean {
4758
4759
4760            #[cfg(feature = "debug")] { _gl_print_debug("glIsShader"); }
4761            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4762
4763            if self.glIsShader == ptr::null_mut() {
4764                _gl_impl_panic("glIsShader");
4765                return 0;
4766            }
4767
4768            unsafe {
4769                let func: extern "system" fn(GLuint) -> GLboolean = mem::transmute(self.glIsShader);
4770                (func)(shader)
4771            }
4772        }
4773
4774        $( $opt )? fn is_texture(&self, texture: GLenum) -> GLboolean {
4775
4776
4777            #[cfg(feature = "debug")] { _gl_print_debug("glIsTexture"); }
4778            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4779
4780            if self.glIsTexture == ptr::null_mut() {
4781                _gl_impl_panic("glIsTexture");
4782                return 0;
4783            }
4784
4785            unsafe {
4786                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsTexture);
4787                (func)(texture)
4788            }
4789        }
4790
4791        $( $opt )? fn is_framebuffer(&self, framebuffer: GLenum) -> GLboolean {
4792
4793
4794            #[cfg(feature = "debug")] { _gl_print_debug("glIsFramebuffer"); }
4795            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4796
4797            if self.glIsFramebuffer == ptr::null_mut() {
4798                _gl_impl_panic("glIsFramebuffer");
4799                return 0;
4800            }
4801
4802            unsafe {
4803                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsFramebuffer);
4804                (func)(framebuffer)
4805            }
4806        }
4807
4808        $( $opt )? fn is_renderbuffer(&self, renderbuffer: GLenum) -> GLboolean {
4809
4810
4811            #[cfg(feature = "debug")] { _gl_print_debug("glIsRenderbuffer"); }
4812            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4813
4814            if self.glIsRenderbuffer == ptr::null_mut() {
4815                _gl_impl_panic("glIsRenderbuffer");
4816                return 0;
4817            }
4818
4819            unsafe {
4820                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsRenderbuffer);
4821                (func)(renderbuffer)
4822            }
4823        }
4824
4825        $( $opt )? fn check_frame_buffer_status(&self, target: GLenum) -> GLenum {
4826
4827
4828            #[cfg(feature = "debug")] { _gl_print_debug("glCheckFramebufferStatus"); }
4829            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4830
4831            if self.glCheckFramebufferStatus == ptr::null_mut() {
4832                _gl_impl_panic("glCheckFramebufferStatus");
4833                return 0;
4834            }
4835
4836            unsafe {
4837                let func: extern "system" fn(GLenum) -> GLenum = mem::transmute(self.glCheckFramebufferStatus);
4838                (func)(target)
4839            }
4840        }
4841
4842        $( $opt )? fn enable_vertex_attrib_array(&self, index: GLuint) {
4843
4844
4845            #[cfg(feature = "debug")] { _gl_print_debug("glEnableVertexAttribArray"); }
4846            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4847
4848            if self.glEnableVertexAttribArray == ptr::null_mut() {
4849                _gl_impl_panic("glEnableVertexAttribArray");
4850                return;
4851            }
4852
4853            unsafe {
4854                let func: extern "system" fn(GLuint) = mem::transmute(self.glEnableVertexAttribArray);
4855                (func)(index);
4856            }
4857        }
4858
4859        $( $opt )? fn disable_vertex_attrib_array(&self, index: GLuint) {
4860
4861
4862            #[cfg(feature = "debug")] { _gl_print_debug("glDisableVertexAttribArray"); }
4863            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4864
4865            if self.glDisableVertexAttribArray == ptr::null_mut() {
4866                _gl_impl_panic("glDisableVertexAttribArray");
4867                return;
4868            }
4869
4870            unsafe {
4871                let func: extern "system" fn(GLuint) = mem::transmute(self.glDisableVertexAttribArray);
4872                (func)(index);
4873            }
4874        }
4875
4876        $( $opt )? fn uniform_1f(&self, location: GLint, v0: GLfloat) {
4877
4878
4879            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1f"); }
4880            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4881
4882            if self.glUniform1f == ptr::null_mut() {
4883                _gl_impl_panic("glUniform1f");
4884                return;
4885            }
4886
4887            unsafe {
4888                let func: extern "system" fn(GLint, GLfloat) = mem::transmute(self.glUniform1f);
4889                (func)(location, v0);
4890            }
4891        }
4892
4893        $( $opt )? fn uniform_1fv(&self, location: GLint, values: &[f32]) {
4894
4895
4896            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1fv"); }
4897            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4898
4899            if self.glUniform1fv == ptr::null_mut() {
4900                _gl_impl_panic("glUniform1fv");
4901                return;
4902            }
4903
4904            unsafe {
4905                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform1fv);
4906                (func)(location, values.len() as GLsizei, values.as_ptr());
4907            }
4908        }
4909
4910        $( $opt )? fn uniform_1i(&self, location: GLint, v0: GLint) {
4911
4912
4913            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1i"); }
4914            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4915
4916            if self.glUniform1i == ptr::null_mut() {
4917                _gl_impl_panic("glUniform1i");
4918                return;
4919            }
4920
4921            unsafe {
4922                let func: extern "system" fn(GLint, GLint) = mem::transmute(self.glUniform1i);
4923                (func)(location, v0);
4924            }
4925        }
4926
4927        $( $opt )? fn uniform_1iv(&self, location: GLint, values: &[i32]) {
4928
4929
4930            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1iv"); }
4931            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4932
4933            if self.glUniform1iv == ptr::null_mut() {
4934                _gl_impl_panic("glUniform1iv");
4935                return;
4936            }
4937
4938            unsafe {
4939                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform1iv);
4940                (func)(location, values.len() as GLsizei, values.as_ptr());
4941            }
4942        }
4943
4944        $( $opt )? fn uniform_1ui(&self, location: GLint, v0: GLuint) {
4945
4946
4947            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1ui"); }
4948            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4949
4950            if self.glUniform1ui == ptr::null_mut() {
4951                _gl_impl_panic("glUniform1ui");
4952                return;
4953            }
4954
4955            unsafe {
4956                let func: extern "system" fn(GLint, GLuint) = mem::transmute(self.glUniform1ui);
4957                (func)(location, v0);
4958            }
4959        }
4960
4961        $( $opt )? fn uniform_2f(&self, location: GLint, v0: GLfloat, v1: GLfloat) {
4962
4963
4964            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2f"); }
4965            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4966
4967            if self.glUniform2f == ptr::null_mut() {
4968                _gl_impl_panic("glUniform2f");
4969                return;
4970            }
4971
4972            unsafe {
4973                let func: extern "system" fn(GLint, GLfloat, GLfloat) = mem::transmute(self.glUniform2f);
4974                (func)(location, v0, v1);
4975            }
4976        }
4977
4978        $( $opt )? fn uniform_2fv(&self, location: GLint, values: &[f32]) {
4979
4980
4981            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2fv"); }
4982            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4983
4984            if self.glUniform2fv == ptr::null_mut() {
4985                _gl_impl_panic("glUniform2fv");
4986                return;
4987            }
4988
4989            unsafe {
4990                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform2fv);
4991                (func)(location, (values.len() / 2) as GLsizei, values.as_ptr());
4992            }
4993        }
4994
4995        $( $opt )? fn uniform_2i(&self, location: GLint, v0: GLint, v1: GLint) {
4996
4997
4998            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2i"); }
4999            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5000
5001            if self.glUniform2i == ptr::null_mut() {
5002                _gl_impl_panic("glUniform2i");
5003                return;
5004            }
5005
5006            unsafe {
5007                let func: extern "system" fn(GLint, GLint, GLint) = mem::transmute(self.glUniform2i);
5008                (func)(location, v0, v1);
5009            }
5010        }
5011
5012        $( $opt )? fn uniform_2iv(&self, location: GLint, values: &[i32]) {
5013
5014
5015            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2iv"); }
5016            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5017
5018            if self.glUniform2iv == ptr::null_mut() {
5019                _gl_impl_panic("glUniform2iv");
5020                return;
5021            }
5022
5023            unsafe {
5024                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform2iv);
5025                (func)(location, (values.len() / 2) as GLsizei, values.as_ptr());
5026            }
5027        }
5028
5029        $( $opt )? fn uniform_2ui(&self, location: GLint, v0: GLuint, v1: GLuint) {
5030
5031
5032            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2ui"); }
5033            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5034
5035            if self.glUniform2ui == ptr::null_mut() {
5036                _gl_impl_panic("glUniform2ui");
5037                return;
5038            }
5039
5040            unsafe {
5041                let func: extern "system" fn(GLint, GLuint, GLuint) = mem::transmute(self.glUniform2ui);
5042                (func)(location, v0, v1);
5043            }
5044        }
5045
5046        $( $opt )? fn uniform_3f(&self, location: GLint, v0: GLfloat, v1: GLfloat, v2: GLfloat) {
5047
5048
5049            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3f"); }
5050            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5051
5052            if self.glUniform3f == ptr::null_mut() {
5053                _gl_impl_panic("glUniform3f");
5054                return;
5055            }
5056
5057            unsafe {
5058                let func: extern "system" fn(GLint, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glUniform3f);
5059                (func)(location, v0, v1, v2);
5060            }
5061        }
5062
5063        $( $opt )? fn uniform_3fv(&self, location: GLint, values: &[f32]) {
5064
5065
5066            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3fv"); }
5067            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5068
5069            if self.glUniform3fv == ptr::null_mut() {
5070                _gl_impl_panic("glUniform3fv");
5071                return;
5072            }
5073
5074            unsafe {
5075                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform3fv);
5076                (func)(location, (values.len() / 3) as GLsizei, values.as_ptr());
5077            }
5078        }
5079
5080        $( $opt )? fn uniform_3i(&self, location: GLint, v0: GLint, v1: GLint, v2: GLint) {
5081
5082
5083            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3i"); }
5084            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5085
5086            if self.glUniform3i == ptr::null_mut() {
5087                _gl_impl_panic("glUniform3i");
5088                return;
5089            }
5090
5091            unsafe {
5092                let func: extern "system" fn(GLint, GLint, GLint, GLint) = mem::transmute(self.glUniform3i);
5093                (func)(location, v0, v1, v2);
5094            }
5095        }
5096
5097        $( $opt )? fn uniform_3iv(&self, location: GLint, values: &[i32]) {
5098
5099
5100            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3iv"); }
5101            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5102
5103            if self.glUniform3iv == ptr::null_mut() {
5104                _gl_impl_panic("glUniform3iv");
5105                return;
5106            }
5107
5108            unsafe {
5109                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform3iv);
5110                (func)(location, (values.len() / 3) as GLsizei, values.as_ptr());
5111            }
5112        }
5113
5114        $( $opt )? fn uniform_3ui(&self, location: GLint, v0: GLuint, v1: GLuint, v2: GLuint) {
5115
5116
5117            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3ui"); }
5118            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5119
5120            if self.glUniform3ui == ptr::null_mut() {
5121                _gl_impl_panic("glUniform3ui");
5122                return;
5123            }
5124
5125            unsafe {
5126                let func: extern "system" fn(GLint, GLuint, GLuint, GLuint) = mem::transmute(self.glUniform3ui);
5127                (func)(location, v0, v1, v2);
5128            }
5129        }
5130
5131        $( $opt )? fn uniform_4f(&self, location: GLint, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat) {
5132
5133
5134            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4f"); }
5135            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5136
5137            if self.glUniform4f == ptr::null_mut() {
5138                _gl_impl_panic("glUniform4f");
5139                return;
5140            }
5141
5142            unsafe {
5143                let func: extern "system" fn(GLint, GLfloat, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glUniform4f);
5144                (func)(location, x, y, z, w);
5145            }
5146        }
5147
5148        $( $opt )? fn uniform_4i(&self, location: GLint, x: GLint, y: GLint, z: GLint, w: GLint) {
5149
5150
5151            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4i"); }
5152            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5153
5154            if self.glUniform4i == ptr::null_mut() {
5155                _gl_impl_panic("glUniform4i");
5156                return;
5157            }
5158
5159            unsafe {
5160                let func: extern "system" fn(GLint, GLint, GLint, GLint, GLint) = mem::transmute(self.glUniform4i);
5161                (func)(location, x, y, z, w);
5162            }
5163        }
5164
5165        $( $opt )? fn uniform_4iv(&self, location: GLint, values: &[i32]) {
5166
5167
5168            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4iv"); }
5169            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5170
5171            if self.glUniform4iv == ptr::null_mut() {
5172                _gl_impl_panic("glUniform4iv");
5173                return;
5174            }
5175
5176            unsafe {
5177                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform4iv);
5178                (func)(location, (values.len() / 4) as GLsizei, values.as_ptr());
5179            }
5180        }
5181
5182        $( $opt )? fn uniform_4ui(&self, location: GLint, x: GLuint, y: GLuint, z: GLuint, w: GLuint) {
5183
5184
5185            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4ui"); }
5186            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5187
5188            if self.glUniform4ui == ptr::null_mut() {
5189                _gl_impl_panic("glUniform4ui");
5190                return;
5191            }
5192
5193            unsafe {
5194                let func: extern "system" fn(GLint, GLuint, GLuint, GLuint, GLuint) = mem::transmute(self.glUniform4ui);
5195                (func)(location, x, y, z, w);
5196            }
5197        }
5198
5199        $( $opt )? fn uniform_4fv(&self, location: GLint, values: &[f32]) {
5200
5201
5202            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4fv"); }
5203            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5204
5205            if self.glUniform4fv == ptr::null_mut() {
5206                _gl_impl_panic("glUniform4fv");
5207                return;
5208            }
5209
5210            unsafe {
5211                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform4fv);
5212                (func)(location, (values.len() / 4) as GLsizei, values.as_ptr());
5213            }
5214        }
5215
5216        $( $opt )? fn uniform_matrix_2fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5217
5218
5219            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix2fv"); }
5220            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5221
5222            if self.glUniformMatrix2fv == ptr::null_mut() {
5223                _gl_impl_panic("glUniformMatrix2fv");
5224                return;
5225            }
5226
5227            unsafe {
5228                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix2fv);
5229                (func)(
5230                    location,
5231                    (value.len() / 4) as GLsizei,
5232                    transpose as GLboolean,
5233                    value.as_ptr(),
5234                );
5235            }
5236        }
5237
5238        $( $opt )? fn uniform_matrix_3fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5239
5240
5241            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix3fv"); }
5242            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5243
5244            if self.glUniformMatrix3fv == ptr::null_mut() {
5245                _gl_impl_panic("glUniformMatrix3fv");
5246                return;
5247            }
5248
5249            unsafe {
5250                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix3fv);
5251                (func)(
5252                    location,
5253                    (value.len() / 9) as GLsizei,
5254                    transpose as GLboolean,
5255                    value.as_ptr(),
5256                );
5257            }
5258        }
5259
5260        $( $opt )? fn uniform_matrix_4fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5261
5262
5263            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix4fv"); }
5264            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5265
5266            if self.glUniformMatrix4fv == ptr::null_mut() {
5267                _gl_impl_panic("glUniformMatrix4fv");
5268                return;
5269            }
5270
5271            unsafe {
5272                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix4fv);
5273                (func)(
5274                    location,
5275                    (value.len() / 16) as GLsizei,
5276                    transpose as GLboolean,
5277                    value.as_ptr(),
5278                );
5279            }
5280        }
5281
5282        $( $opt )? fn depth_mask(&self, flag: bool) {
5283
5284
5285            #[cfg(feature = "debug")] { _gl_print_debug("glDepthMask"); }
5286            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5287
5288            if self.glDepthMask == ptr::null_mut() {
5289                _gl_impl_panic("glDepthMask");
5290                return;
5291            }
5292
5293            unsafe {
5294                let func: extern "system" fn(GLboolean) = mem::transmute(self.glDepthMask);
5295                (func)(flag as GLboolean);
5296            }
5297        }
5298
5299        $( $opt )? fn depth_range(&self, near: f64, far: f64) {
5300
5301
5302            #[cfg(feature = "debug")] { _gl_print_debug("glDepthRange"); }
5303            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5304
5305            if self.glDepthRange == ptr::null_mut() {
5306                _gl_impl_panic("glDepthRange");
5307                return;
5308            }
5309
5310            unsafe {
5311                let func: extern "system" fn(GLclampd, GLclampd) = mem::transmute(self.glDepthRange);
5312                (func)(near as GLclampd, far as GLclampd);
5313            }
5314        }
5315
5316        $( $opt )? fn get_active_attrib(&self, program: GLuint, index: GLuint) -> (i32, u32, String) {
5317
5318
5319            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveAttrib"); }
5320            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5321
5322            if self.glGetActiveAttrib == ptr::null_mut() {
5323                _gl_impl_panic("glGetActiveAttrib");
5324                return (0, 0, String::new());
5325            }
5326
5327            let mut buf_size = [0];
5328            unsafe {
5329                self.get_program_iv(program, gl::ACTIVE_ATTRIBUTE_MAX_LENGTH, &mut buf_size);
5330            }
5331            let mut name = vec![0u8; buf_size[0] as usize];
5332            let mut length = 0 as GLsizei;
5333            let mut size = 0 as i32;
5334            let mut type_ = 0 as u32;
5335            unsafe {
5336                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLint, *mut GLenum, *mut GLchar) = mem::transmute(self.glGetActiveAttrib);
5337                (func)(
5338                    program,
5339                    index,
5340                    buf_size[0],
5341                    &mut length,
5342                    &mut size,
5343                    &mut type_,
5344                    name.as_mut_ptr() as *mut GLchar,
5345                );
5346            }
5347            name.truncate(if length > 0 { length as usize } else { 0 });
5348            (size, type_, String::from_utf8(name).unwrap())
5349        }
5350
5351        $( $opt )? fn get_active_uniform(&self, program: GLuint, index: GLuint) -> (i32, u32, String) {
5352
5353
5354            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniform"); }
5355            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5356
5357            if self.glGetActiveUniform == ptr::null_mut() {
5358                _gl_impl_panic("glGetActiveUniform");
5359                return (0, 0, String::new());
5360            }
5361
5362            let mut buf_size = [0];
5363            unsafe {
5364                self.get_program_iv(program, gl::ACTIVE_UNIFORM_MAX_LENGTH, &mut buf_size);
5365            }
5366            let mut name = vec![0 as u8; buf_size[0] as usize];
5367            let mut length: GLsizei = 0;
5368            let mut size: i32 = 0;
5369            let mut type_: u32 = 0;
5370
5371            unsafe {
5372                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLint, *mut GLenum, *mut GLchar) = mem::transmute(self.glGetActiveUniform);
5373                (func)(
5374                    program,
5375                    index,
5376                    buf_size[0],
5377                    &mut length,
5378                    &mut size,
5379                    &mut type_,
5380                    name.as_mut_ptr() as *mut GLchar,
5381                );
5382            }
5383
5384            name.truncate(if length > 0 { length as usize } else { 0 });
5385
5386            (size, type_, String::from_utf8(name).unwrap())
5387        }
5388
5389        $( $opt )? fn get_active_uniforms_iv(
5390            &self,
5391            program: GLuint,
5392            indices: Vec<GLuint>,
5393            pname: GLenum,
5394        ) -> Vec<GLint> {
5395
5396
5397            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformsiv"); }
5398            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5399
5400            if self.glGetActiveUniformsiv == ptr::null_mut() {
5401                _gl_impl_panic("glGetActiveUniformsiv");
5402                return Vec::new();
5403            }
5404
5405            let mut result = Vec::with_capacity(indices.len());
5406            unsafe {
5407                result.set_len(indices.len());
5408                let func: extern "system" fn(GLuint, GLsizei, *const GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformsiv);
5409                (func)(
5410                    program,
5411                    indices.len() as GLsizei,
5412                    indices.as_ptr(),
5413                    pname,
5414                    result.as_mut_ptr(),
5415                );
5416            }
5417            result
5418        }
5419
5420        $( $opt )? fn get_active_uniform_block_i(&self, program: GLuint, index: GLuint, pname: GLenum) -> GLint {
5421
5422
5423            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockiv"); }
5424            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5425
5426            if self.glGetActiveUniformBlockiv == ptr::null_mut() {
5427                _gl_impl_panic("glGetActiveUniformBlockiv");
5428                return 0;
5429            }
5430
5431            let mut result = 0;
5432            unsafe {
5433                let func: extern "system" fn(GLuint, GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformBlockiv);
5434                (func)(program, index, pname, &mut result);
5435            }
5436            result
5437        }
5438
5439        $( $opt )? fn get_active_uniform_block_iv(
5440            &self,
5441            program: GLuint,
5442            index: GLuint,
5443            pname: GLenum,
5444        ) -> Vec<GLint> {
5445
5446
5447            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockiv"); }
5448            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5449
5450            if self.glGetActiveUniformBlockiv == ptr::null_mut() {
5451                _gl_impl_panic("glGetActiveUniformBlockiv");
5452                return Vec::new();
5453            }
5454
5455            let count = self.get_active_uniform_block_i(program, index, gl::UNIFORM_BLOCK_ACTIVE_UNIFORMS);
5456            let mut result = Vec::with_capacity(count as usize);
5457            unsafe {
5458                result.set_len(count as usize);
5459                let func: extern "system" fn(GLuint, GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformBlockiv);
5460                (func)(program, index, pname, result.as_mut_ptr());
5461            }
5462            result
5463        }
5464
5465        $( $opt )? fn get_active_uniform_block_name(&self, program: GLuint, index: GLuint) -> String {
5466
5467
5468            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockName"); }
5469            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5470
5471            if self.glGetActiveUniformBlockName == ptr::null_mut() {
5472                _gl_impl_panic("glGetActiveUniformBlockName");
5473                return String::new();
5474            }
5475
5476            let buf_size = self.get_active_uniform_block_i(program, index, gl::UNIFORM_BLOCK_NAME_LENGTH);
5477            let mut name = vec![0 as u8; buf_size as usize];
5478            let mut length: GLsizei = 0;
5479            unsafe {
5480                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetActiveUniformBlockName);
5481                (func)(
5482                    program,
5483                    index,
5484                    buf_size,
5485                    &mut length,
5486                    name.as_mut_ptr() as *mut GLchar,
5487                );
5488            }
5489            name.truncate(if length > 0 { length as usize } else { 0 });
5490
5491            String::from_utf8(name).unwrap()
5492        }
5493
5494        $( $opt )? fn get_attrib_location(&self, program: GLuint, name: &str) -> c_int {
5495
5496
5497            #[cfg(feature = "debug")] { _gl_print_debug("glGetAttribLocation"); }
5498            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5499
5500            if self.glGetAttribLocation == ptr::null_mut() {
5501                _gl_impl_panic("glGetAttribLocation");
5502                return 0;
5503            }
5504
5505            let name = encode_ascii(name);
5506            unsafe {
5507                let func: extern "system" fn(GLuint, *const GLchar) -> c_int = mem::transmute(self.glGetAttribLocation);
5508                (func)(program, name.as_ptr())
5509            }
5510        }
5511
5512        $( $opt )? fn get_frag_data_location(&self, program: GLuint, name: &str) -> c_int {
5513
5514
5515            #[cfg(feature = "debug")] { _gl_print_debug("glGetFragDataLocation"); }
5516            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5517
5518            if self.glGetFragDataLocation == ptr::null_mut() {
5519                _gl_impl_panic("glGetFragDataLocation");
5520                return 0;
5521            }
5522
5523            let name = encode_ascii(name);
5524            unsafe {
5525                let func: extern "system" fn(GLuint, *const c_char)  -> c_int = mem::transmute(self.glGetFragDataLocation);
5526                (func)(program, name.as_ptr())
5527            }
5528        }
5529
5530        $( $opt )? fn get_uniform_location(&self, program: GLuint, name: &str) -> c_int {
5531
5532
5533            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformLocation"); }
5534            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5535
5536            if self.glGetUniformLocation == ptr::null_mut() {
5537                _gl_impl_panic("glGetUniformLocation");
5538                return 0;
5539            }
5540
5541            let name = encode_ascii(name);
5542            unsafe {
5543                let func: extern "system" fn(GLuint, *const GLchar)  -> c_int = mem::transmute(self.glGetUniformLocation);
5544                (func)(program, name.as_ptr())
5545            }
5546        }
5547
5548        $( $opt )? fn get_program_info_log(&self, program: GLuint) -> String {
5549
5550
5551            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramInfoLog"); }
5552            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5553
5554            if self.glGetProgramInfoLog == ptr::null_mut() {
5555                _gl_impl_panic("glGetProgramInfoLog");
5556                return String::new();
5557            }
5558
5559            let mut max_len = [0];
5560            unsafe {
5561                self.get_program_iv(program, gl::INFO_LOG_LENGTH, &mut max_len);
5562            }
5563            if max_len[0] == 0 {
5564                return String::new();
5565            }
5566            let mut result = vec![0u8; max_len[0] as usize];
5567            let mut result_len = 0 as GLsizei;
5568            unsafe {
5569                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetProgramInfoLog);
5570                (func)(
5571                    program,
5572                    max_len[0] as GLsizei,
5573                    &mut result_len,
5574                    result.as_mut_ptr() as *mut GLchar,
5575                );
5576            }
5577            result.truncate(if result_len > 0 {
5578                result_len as usize
5579            } else {
5580                0
5581            });
5582            String::from_utf8(result).unwrap()
5583        }
5584
5585        #[inline]
5586        $( $opt )? unsafe fn get_program_iv(&self, program: GLuint, pname: GLenum, result: &mut [GLint]) {
5587
5588            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramiv"); }
5589            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5590
5591            if self.glGetProgramiv == ptr::null_mut() {
5592                _gl_impl_panic("glGetProgramiv");
5593                return;
5594            }
5595            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetProgramiv);
5596            (func)(program, pname, result.as_mut_ptr());
5597        }
5598
5599        $( $opt )? fn get_program_binary(&self, program: GLuint) -> (Vec<u8>, GLenum) {
5600
5601            const NONE: GLenum = 0;
5602
5603
5604            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramBinary"); }
5605            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5606
5607            if self.glGetProgramBinary == ptr::null_mut() {
5608                _gl_impl_panic("glGetProgramBinary");
5609                return (Vec::new(), NONE);
5610            }
5611
5612            let mut len = [0];
5613            unsafe {
5614                self.get_program_iv(program, gl::PROGRAM_BINARY_LENGTH, &mut len);
5615            }
5616            if len[0] <= 0 {
5617                return (Vec::new(), NONE);
5618            }
5619            let mut binary: Vec<u8> = Vec::with_capacity(len[0] as usize);
5620            let mut format = NONE;
5621            let mut out_len = 0;
5622            unsafe {
5623                binary.set_len(len[0] as usize);
5624                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLenum, *mut c_void) = mem::transmute(self.glGetProgramBinary);
5625                (func)(
5626                    program,
5627                    len[0],
5628                    &mut out_len as *mut GLsizei,
5629                    &mut format,
5630                    binary.as_mut_ptr() as *mut c_void,
5631                );
5632            }
5633            if len[0] != out_len {
5634                return (Vec::new(), NONE);
5635            }
5636
5637            (binary, format)
5638        }
5639
5640        $( $opt )? fn program_binary(&self, program: GLuint, format: GLenum, binary: &[u8]) {
5641
5642            #[cfg(feature = "debug")] { _gl_print_debug("glProgramBinary"); }
5643            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5644
5645            if self.glProgramBinary == ptr::null_mut() {
5646                _gl_impl_panic("glProgramBinary");
5647                return;
5648            }
5649
5650            unsafe {
5651                let func: extern "system" fn(GLuint, GLenum, *const c_void, GLsizei) = mem::transmute(self.glProgramBinary);
5652                (func)(
5653                    program,
5654                    format,
5655                    binary.as_ptr() as *const c_void,
5656                    binary.len() as GLsizei,
5657                );
5658            }
5659        }
5660
5661        $( $opt )? fn program_parameter_i(&self, program: GLuint, pname: GLenum, value: GLint) {
5662
5663            #[cfg(feature = "debug")] { _gl_print_debug("glProgramParameteri"); }
5664            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5665
5666            if self.glProgramParameteri == ptr::null_mut() {
5667                _gl_impl_panic("glProgramParameteri");
5668                return;
5669            }
5670            unsafe {
5671                let func: extern "system" fn(GLuint, GLenum, GLint) = mem::transmute(self.glProgramParameteri);
5672                (func)(program, pname, value);
5673            }
5674        }
5675
5676        #[inline]
5677        $( $opt )? unsafe fn get_vertex_attrib_iv(&self, index: GLuint, pname: GLenum, result: &mut [GLint]) {
5678
5679            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribiv"); }
5680            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5681
5682            if self.glGetVertexAttribiv == ptr::null_mut() {
5683                _gl_impl_panic("glGetVertexAttribiv");
5684                return;
5685            }
5686            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetVertexAttribiv);
5687            (func)(index, pname, result.as_mut_ptr());
5688        }
5689
5690        #[inline]
5691        $( $opt )? unsafe fn get_vertex_attrib_fv(&self, index: GLuint, pname: GLenum, result: &mut [GLfloat]) {
5692
5693            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribfv"); }
5694            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5695
5696            if self.glGetVertexAttribfv == ptr::null_mut() {
5697                _gl_impl_panic("glGetVertexAttribfv");
5698                return;
5699            }
5700            let func: extern "system" fn(GLuint, GLenum, *mut GLfloat) = mem::transmute(self.glGetVertexAttribfv);
5701            (func)(index, pname, result.as_mut_ptr());
5702        }
5703
5704        $( $opt )? fn get_vertex_attrib_pointer_v(&self, index: GLuint, pname: GLenum) -> GLsizeiptr {
5705
5706
5707            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribPointerv"); }
5708            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5709
5710            if self.glGetVertexAttribPointerv == ptr::null_mut() {
5711                _gl_impl_panic("glGetVertexAttribPointerv");
5712                return 0;
5713            }
5714
5715            let mut result = 0 as *mut GLvoid;
5716            unsafe {
5717                let func: extern "system" fn(GLuint, GLenum, *mut *mut GLvoid) = mem::transmute(self.glGetVertexAttribPointerv);
5718                (func)(index, pname, &mut result)
5719            }
5720            result as GLsizeiptr
5721        }
5722
5723        $( $opt )? fn get_buffer_parameter_iv(&self, target: GLuint, pname: GLenum) -> GLint {
5724
5725
5726            #[cfg(feature = "debug")] { _gl_print_debug("glGetBufferParameteriv"); }
5727            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5728
5729            if self.glGetBufferParameteriv == ptr::null_mut() {
5730                _gl_impl_panic("glGetBufferParameteriv");
5731                return 0;
5732            }
5733
5734            let mut result = 0 as GLint;
5735            unsafe {
5736                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetBufferParameteriv);
5737                (func)(target, pname, &mut result);
5738            }
5739            result
5740        }
5741
5742        $( $opt )? fn get_shader_info_log(&self, shader: GLuint) -> String {
5743
5744
5745            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderInfoLog"); }
5746            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5747
5748            if self.glGetShaderInfoLog == ptr::null_mut() {
5749                _gl_impl_panic("glGetShaderInfoLog");
5750                return String::new();
5751            }
5752
5753            let mut max_len = [0];
5754            unsafe {
5755                self.get_shader_iv(shader, gl::INFO_LOG_LENGTH, &mut max_len);
5756            }
5757            if max_len[0] == 0 {
5758                return String::new();
5759            }
5760            let mut result = vec![0u8; max_len[0] as usize];
5761            let mut result_len = 0 as GLsizei;
5762            unsafe {
5763                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetShaderInfoLog);
5764                (func)(
5765                    shader,
5766                    max_len[0] as GLsizei,
5767                    &mut result_len,
5768                    result.as_mut_ptr() as *mut GLchar,
5769                );
5770            }
5771            result.truncate(if result_len > 0 {
5772                result_len as usize
5773            } else {
5774                0
5775            });
5776            String::from_utf8(result).unwrap()
5777        }
5778
5779        $( $opt )? fn get_string(&self, which: GLenum) -> String {
5780
5781
5782            #[cfg(feature = "debug")] { _gl_print_debug("glGetString"); }
5783            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5784
5785            if self.glGetString == ptr::null_mut() {
5786                _gl_impl_panic("glGetString");
5787                return String::new();
5788            }
5789
5790            unsafe {
5791                let func: extern "system" fn(GLenum) -> *mut GLubyte = mem::transmute(self.glGetString);
5792                let llstr = (func)(which);
5793                if !llstr.is_null() {
5794                    cstr_from_ptr(llstr as *const c_char).to_string()
5795                } else {
5796                    String::new()
5797                }
5798            }
5799        }
5800
5801        $( $opt )? fn get_string_i(&self, which: GLenum, index: GLuint) -> String {
5802
5803
5804            #[cfg(feature = "debug")] { _gl_print_debug("glGetStringi"); }
5805            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5806
5807            if self.glGetStringi == ptr::null_mut() {
5808                _gl_impl_panic("glGetStringi");
5809                return String::new();
5810            }
5811
5812            unsafe {
5813                let func: extern "system" fn(GLenum, GLuint) -> *mut GLubyte = mem::transmute(self.glGetStringi);
5814                let llstr = (func)(which, index);
5815                if !llstr.is_null() {
5816                    cstr_from_ptr(llstr as *const c_char).to_string()
5817                } else {
5818                    String::new()
5819                }
5820            }
5821        }
5822
5823        $( $opt )? unsafe fn get_shader_iv(&self, shader: GLuint, pname: GLenum, result: &mut [GLint]) {
5824
5825
5826            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderiv"); }
5827            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5828
5829            if self.glGetShaderiv == ptr::null_mut() {
5830                _gl_impl_panic("glGetShaderiv");
5831                return;
5832            }
5833
5834            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetShaderiv);
5835            (func)(shader, pname, result.as_mut_ptr());
5836        }
5837
5838        $( $opt )? fn get_shader_precision_format(
5839            &self,
5840            _shader_type: GLuint,
5841            precision_type: GLuint,
5842        ) -> (GLint, GLint, GLint) {
5843
5844
5845            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderPrecisionFormat"); }
5846            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5847
5848            // if self.glGetShaderPrecisionFormat == ptr::null_mut() {
5849            //     _gl_impl_panic("glGetShaderPrecisionFormat");
5850            //     return (0, 0, 0);
5851            // }
5852
5853            // gl.GetShaderPrecisionFormat is not available until OpenGL 4.1.
5854            // Fallback to OpenGL standard precissions that most desktop hardware support.
5855            match precision_type {
5856                gl::LOW_FLOAT | gl::MEDIUM_FLOAT | gl::HIGH_FLOAT => {
5857                    // Fallback to IEEE 754 single precision
5858                    // Range: from -2^127 to 2^127
5859                    // Significand precision: 23 bits
5860                    (127, 127, 23)
5861                }
5862                gl::LOW_INT | gl::MEDIUM_INT | gl::HIGH_INT => {
5863                    // Fallback to single precision integer
5864                    // Range: from -2^24 to 2^24
5865                    // Precision: For integer formats this value is always 0
5866                    (24, 24, 0)
5867                }
5868                _ => (0, 0, 0),
5869            }
5870        }
5871
5872        $( $opt )? fn compile_shader(&self, shader: GLuint) {
5873
5874
5875            #[cfg(feature = "debug")] { _gl_print_debug("glCompileShader"); }
5876            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5877
5878            if self.glCompileShader == ptr::null_mut() {
5879                _gl_impl_panic("glCompileShader");
5880                return;
5881            }
5882
5883            unsafe {
5884                let func: extern "system" fn(GLuint) = mem::transmute(self.glCompileShader);
5885                (func)(shader);
5886            }
5887        }
5888
5889        $( $opt )? fn create_program(&self) -> GLuint {
5890
5891
5892            #[cfg(feature = "debug")] { _gl_print_debug("glCreateProgram"); }
5893            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5894
5895            if self.glCreateProgram == ptr::null_mut() {
5896                _gl_impl_panic("glCreateProgram");
5897                return 0;
5898            }
5899
5900            unsafe {
5901                let func: extern "system" fn() -> GLuint = mem::transmute(self.glCreateProgram);
5902                return (func)();
5903            }
5904        }
5905
5906        $( $opt )? fn delete_program(&self, program: GLuint) {
5907
5908
5909            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteProgram"); }
5910            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5911
5912            if self.glDeleteProgram == ptr::null_mut() {
5913                _gl_impl_panic("glDeleteProgram");
5914                return;
5915            }
5916
5917            unsafe {
5918                let func: extern "system" fn(GLuint) = mem::transmute(self.glDeleteProgram);
5919                (func)(program);
5920            }
5921        }
5922
5923        $( $opt )? fn create_shader(&self, shader_type: GLenum) -> GLuint {
5924
5925
5926            #[cfg(feature = "debug")] { _gl_print_debug("glCreateShader"); }
5927            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5928
5929            if self.glCreateShader == ptr::null_mut() {
5930                _gl_impl_panic("glCreateShader");
5931                return 0;
5932            }
5933
5934            unsafe {
5935                let func: extern "system" fn(GLenum) -> GLuint = mem::transmute(self.glCreateShader);
5936                return (func)(shader_type);
5937            }
5938        }
5939
5940        $( $opt )? fn delete_shader(&self, shader: GLuint) {
5941
5942
5943            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteShader"); }
5944            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5945
5946            if self.glDeleteShader == ptr::null_mut() {
5947                _gl_impl_panic("glDeleteShader");
5948                return;
5949            }
5950
5951            unsafe {
5952                let func: extern "system" fn(GLuint) = mem::transmute(self.glDeleteShader);
5953                (func)(shader);
5954            }
5955        }
5956
5957        $( $opt )? fn detach_shader(&self, program: GLuint, shader: GLuint) {
5958
5959
5960            #[cfg(feature = "debug")] { _gl_print_debug("glDetachShader"); }
5961            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5962
5963            if self.glDetachShader == ptr::null_mut() {
5964                _gl_impl_panic("glDetachShader");
5965                return;
5966            }
5967
5968            unsafe {
5969                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glDetachShader);
5970                (func)(program, shader);
5971            }
5972        }
5973
5974        $( $opt )? fn link_program(&self, program: GLuint) {
5975
5976
5977            #[cfg(feature = "debug")] { _gl_print_debug("glLinkProgram"); }
5978            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5979
5980            if self.glLinkProgram == ptr::null_mut() {
5981                _gl_impl_panic("glLinkProgram");
5982                return;
5983            }
5984
5985            unsafe {
5986                let func: extern "system" fn(GLuint) = mem::transmute(self.glLinkProgram);
5987                return (func)(program);
5988            }
5989        }
5990
5991        $( $opt )? fn clear_color(&self, r: f32, g: f32, b: f32, a: f32) {
5992
5993
5994            #[cfg(feature = "debug")] { _gl_print_debug("glClearColor"); }
5995            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5996
5997            if self.glClearColor == ptr::null_mut() {
5998                _gl_impl_panic("glClearColor");
5999                return;
6000            }
6001
6002            unsafe {
6003                let func: extern "system" fn(GLclampf, GLclampf, GLclampf, GLclampf) = mem::transmute(self.glClearColor);
6004                (func)(r, g, b, a);
6005            }
6006        }
6007
6008        $( $opt )? fn clear(&self, buffer_mask: GLbitfield) {
6009
6010
6011            #[cfg(feature = "debug")] { _gl_print_debug("glClear"); }
6012            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6013
6014            if self.glClear == ptr::null_mut() {
6015                _gl_impl_panic("glClear");
6016                return;
6017            }
6018
6019            unsafe {
6020                let func: extern "system" fn(GLbitfield) = mem::transmute(self.glClear);
6021                (func)(buffer_mask);
6022            }
6023        }
6024
6025        $( $opt )? fn clear_depth(&self, depth: f64) {
6026
6027
6028            #[cfg(feature = "debug")] { _gl_print_debug("glClearDepth"); }
6029            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6030
6031            if self.glClearDepth == ptr::null_mut() {
6032                _gl_impl_panic("glClearDepth");
6033                return;
6034            }
6035
6036            unsafe {
6037                let func: extern "system" fn(GLclampd) = mem::transmute(self.glClearDepth);
6038                (func)(depth as GLclampd);
6039            }
6040        }
6041
6042        $( $opt )? fn clear_stencil(&self, s: GLint) {
6043
6044
6045            #[cfg(feature = "debug")] { _gl_print_debug("glClearStencil"); }
6046            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6047
6048            if self.glClearStencil == ptr::null_mut() {
6049                _gl_impl_panic("glClearStencil");
6050                return;
6051            }
6052
6053            unsafe {
6054                let func: extern "system" fn(GLint) = mem::transmute(self.glClearStencil);
6055                (func)(s);
6056            }
6057        }
6058
6059        $( $opt )? fn flush(&self) {
6060
6061
6062            #[cfg(feature = "debug")] { _gl_print_debug("glFlush"); }
6063            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6064
6065            if self.glFlush == ptr::null_mut() {
6066                _gl_impl_panic("glFlush");
6067                return;
6068            }
6069
6070            unsafe {
6071                let func: extern "system" fn() = mem::transmute(self.glFlush);
6072                (func)();
6073            }
6074        }
6075
6076        $( $opt )? fn finish(&self) {
6077
6078
6079            #[cfg(feature = "debug")] { _gl_print_debug("glFinish"); }
6080            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6081
6082            if self.glFinish == ptr::null_mut() {
6083                _gl_impl_panic("glFinish");
6084                return;
6085            }
6086
6087            unsafe {
6088                let func: extern "system" fn() = mem::transmute(self.glFinish);
6089                (func)();
6090            }
6091        }
6092
6093        $( $opt )? fn get_error(&self) -> GLenum {
6094
6095
6096            #[cfg(feature = "debug")] { #[cfg(not(feature = "error"))] { _gl_print_debug("glGetError"); } }
6097
6098            if self.glGetError == ptr::null_mut() {
6099                _gl_impl_panic("glGetError");
6100                return 0;
6101            }
6102
6103            unsafe {
6104                let func: extern "system" fn() -> GLenum = mem::transmute(self.glGetError);
6105                (func)()
6106            }
6107        }
6108
6109        $( $opt )? fn stencil_mask(&self, mask: GLuint) {
6110
6111
6112            #[cfg(feature = "debug")] { _gl_print_debug("glStencilMask"); }
6113            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6114
6115            if self.glStencilMask == ptr::null_mut() {
6116                _gl_impl_panic("glStencilMask");
6117                return;
6118            }
6119
6120            unsafe {
6121                let func: extern "system" fn(GLuint) = mem::transmute(self.glStencilMask);
6122                (func)(mask)
6123            }
6124        }
6125
6126        $( $opt )? fn stencil_mask_separate(&self, face: GLenum, mask: GLuint) {
6127
6128
6129            #[cfg(feature = "debug")] { _gl_print_debug("glStencilMaskSeparate"); }
6130            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6131
6132            if self.glStencilMaskSeparate == ptr::null_mut() {
6133                _gl_impl_panic("glStencilMaskSeparate");
6134                return;
6135            }
6136
6137            unsafe {
6138                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glStencilMaskSeparate);
6139                (func)(face, mask)
6140            }
6141        }
6142
6143        $( $opt )? fn stencil_func(&self, func: GLenum, ref_: GLint, mask: GLuint) {
6144
6145
6146            #[cfg(feature = "debug")] { _gl_print_debug("glStencilFunc"); }
6147            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6148
6149            if self.glStencilFunc == ptr::null_mut() {
6150                _gl_impl_panic("glStencilFunc");
6151                return;
6152            }
6153
6154            unsafe {
6155                let glStencilFunc: extern "system" fn(GLenum, GLint, GLuint) = mem::transmute(self.glStencilFunc);
6156                (glStencilFunc)(func, ref_, mask)
6157            }
6158        }
6159
6160        $( $opt )? fn stencil_func_separate(&self, face: GLenum, func: GLenum, ref_: GLint, mask: GLuint) {
6161
6162
6163            #[cfg(feature = "debug")] { _gl_print_debug("glStencilFuncSeparate"); }
6164            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6165
6166            if self.glStencilFuncSeparate == ptr::null_mut() {
6167                _gl_impl_panic("glStencilFuncSeparate");
6168                return;
6169            }
6170
6171            unsafe {
6172                let glStencilFuncSeparate: extern "system" fn(GLenum, GLenum, GLint, GLuint) = mem::transmute(self.glStencilFuncSeparate);
6173                (glStencilFuncSeparate)(face, func, ref_, mask)
6174            }
6175        }
6176
6177        $( $opt )? fn stencil_op(&self, sfail: GLenum, dpfail: GLenum, dppass: GLenum) {
6178
6179
6180            #[cfg(feature = "debug")] { _gl_print_debug("glStencilOp"); }
6181            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6182
6183            if self.glStencilOp == ptr::null_mut() {
6184                _gl_impl_panic("glStencilOp");
6185                return;
6186            }
6187
6188            unsafe {
6189                let func: extern "system" fn(GLenum, GLenum, GLenum) = mem::transmute(self.glStencilOp);
6190                (func)(sfail, dpfail, dppass)
6191            }
6192        }
6193
6194        $( $opt )? fn stencil_op_separate(&self, face: GLenum, sfail: GLenum, dpfail: GLenum, dppass: GLenum) {
6195
6196
6197            #[cfg(feature = "debug")] { _gl_print_debug("glStencilOpSeparate"); }
6198            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6199
6200            if self.glStencilOpSeparate == ptr::null_mut() {
6201                _gl_impl_panic("glStencilOpSeparate");
6202                return;
6203            }
6204
6205            unsafe {
6206                let func: extern "system" fn(GLenum, GLenum, GLenum, GLenum) = mem::transmute(self.glStencilOpSeparate);
6207                (func)(face, sfail, dpfail, dppass)
6208            }
6209        }
6210
6211        #[allow(unused_variables)]
6212        $( $opt )? fn egl_image_target_texture2d_oes(&self, target: GLenum, image: GLeglImageOES) {
6213
6214            #[cfg(feature = "debug")] { _gl_print_debug("glEglImageTargetTexture2dOes"); }
6215            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6216
6217            return; // not supported
6218
6219            // if self.glEglImageTargetTexture2dOes == ptr::null_mut() {
6220            //     _gl_impl_panic("glEglImageTargetTexture2dOes");
6221            //     return;
6222            // }
6223        }
6224
6225        #[allow(unused_variables)]
6226        $( $opt )? fn egl_image_target_renderbuffer_storage_oes(&self, target: GLenum, image: GLeglImageOES) {
6227
6228            #[cfg(feature = "debug")] { _gl_print_debug("glEglImageTargetRenderbufferStorageOes"); }
6229            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6230
6231            return; // not supported
6232
6233            // if self.glEglImageTargetRenderbufferStorageOes == ptr::null_mut() {
6234            //     _gl_impl_panic("glEglImageTargetRenderbufferStorageOes");
6235            //     return;
6236            // }
6237        }
6238
6239        $( $opt )? fn generate_mipmap(&self, target: GLenum) {
6240
6241            #[cfg(feature = "debug")] { _gl_print_debug("glGenerateMipmap"); }
6242            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6243
6244            if self.glGenerateMipmap == ptr::null_mut() {
6245                _gl_impl_panic("glGenerateMipmap");
6246                return;
6247            }
6248
6249            unsafe {
6250                let func: extern "system" fn(GLenum) = mem::transmute(self.glGenerateMipmap);
6251                (func)(target)
6252            }
6253        }
6254
6255        $( $opt )? fn insert_event_marker_ext(&self, message: &str) {
6256
6257
6258            #[cfg(feature = "debug")] { _gl_print_debug("glInsertEventMarkerEXT"); }
6259            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6260
6261            if self.glInsertEventMarkerEXT == ptr::null_mut() {
6262                _gl_impl_panic("glInsertEventMarkerEXT");
6263                return;
6264            }
6265
6266            unsafe {
6267                let func: extern "system" fn(GLsizei, *const GLchar) = mem::transmute(self.glInsertEventMarkerEXT);
6268                (func)(message.len() as GLsizei, message.as_ptr() as *const _);
6269            }
6270        }
6271
6272        $( $opt )? fn push_group_marker_ext(&self, message: &str) {
6273
6274
6275            #[cfg(feature = "debug")] { _gl_print_debug("glPushGroupMarkerEXT"); }
6276            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6277
6278            if self.glPushGroupMarkerEXT == ptr::null_mut() {
6279                _gl_impl_panic("glPushGroupMarkerEXT");
6280                return;
6281            }
6282
6283            unsafe {
6284                let func: extern "system" fn(GLsizei, *const GLchar) = mem::transmute(self.glPushGroupMarkerEXT);
6285                (func)(message.len() as GLsizei, message.as_ptr() as *const _);
6286            }
6287        }
6288
6289        $( $opt )? fn pop_group_marker_ext(&self) {
6290
6291
6292            #[cfg(feature = "debug")] { _gl_print_debug("glPopGroupMarkerEXT"); }
6293            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6294
6295            if self.glPopGroupMarkerEXT == ptr::null_mut() {
6296                _gl_impl_panic("glPopGroupMarkerEXT");
6297                return;
6298            }
6299
6300            unsafe {
6301                let func: extern "system" fn() = mem::transmute(self.glPopGroupMarkerEXT);
6302                (func)();
6303            }
6304        }
6305
6306        $( $opt )? fn debug_message_insert_khr(&self, source: GLenum, type_: GLenum, id: GLuint, severity: GLenum, message: &str) {
6307
6308
6309            #[cfg(feature = "debug")] { _gl_print_debug("glDebugMessageInsertKHR"); }
6310            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6311
6312            if self.glDebugMessageInsertKHR == ptr::null_mut() {
6313                _gl_impl_panic("glDebugMessageInsertKHR");
6314                return;
6315            }
6316
6317            unsafe {
6318                // TODO: correct?
6319                let func: extern "system" fn(GLenum, GLenum, GLuint, GLenum, GLsizei, *const c_char) = mem::transmute(self.glDebugMessageInsertKHR);
6320                (func)(source, type_, id, severity, message.len() as GLsizei, message.as_ptr() as *const _);
6321            }
6322        }
6323
6324        $( $opt )? fn push_debug_group_khr(&self, source: GLenum, id: GLuint, message: &str) {
6325
6326
6327            #[cfg(feature = "debug")] { _gl_print_debug("glPushDebugGroupKHR"); }
6328            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6329
6330            if self.glPushDebugGroupKHR == ptr::null_mut() {
6331                _gl_impl_panic("glPushDebugGroupKHR");
6332                return;
6333            }
6334
6335            unsafe {
6336                let func: extern "system" fn(GLenum, GLuint, GLsizei, *const c_char) = mem::transmute(self.glPushDebugGroupKHR);
6337                (func)(source, id, message.len() as GLsizei, message.as_ptr() as *const _);
6338            }
6339        }
6340
6341        $( $opt )? fn pop_debug_group_khr(&self) {
6342
6343
6344            #[cfg(feature = "debug")] { _gl_print_debug("glPopDebugGroupKHR"); }
6345            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6346
6347            if self.glPopDebugGroupKHR == ptr::null_mut() {
6348                _gl_impl_panic("glPopDebugGroupKHR");
6349                return;
6350            }
6351
6352            unsafe {
6353                let func: extern "system" fn() = mem::transmute(self.glPopDebugGroupKHR);
6354                (func)();
6355            }
6356        }
6357
6358        $( $opt )? fn fence_sync(&self, condition: GLenum, flags: GLbitfield) -> GLsync {
6359
6360
6361            #[cfg(feature = "debug")] { _gl_print_debug("glFenceSync"); }
6362            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6363
6364            if self.glFenceSync == ptr::null_mut() {
6365                _gl_impl_panic("glFenceSync");
6366                return ptr::null_mut();
6367            }
6368
6369            unsafe {
6370                let func: extern "system" fn(GLenum, GLbitfield) -> GLsync = mem::transmute(self.glFenceSync);
6371                (func)(condition, flags) as *const _
6372            }
6373        }
6374
6375        $( $opt )? fn client_wait_sync(&self, sync: GLsync, flags: GLbitfield, timeout: GLuint64) -> GLenum {
6376
6377
6378            #[cfg(feature = "debug")] { _gl_print_debug("glClientWaitSync"); }
6379            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6380
6381            if self.glClientWaitSync == ptr::null_mut() {
6382                _gl_impl_panic("glClientWaitSync");
6383                return 0;
6384            }
6385
6386            unsafe {
6387                let func: extern "system" fn(GLsync, GLbitfield, GLuint64) -> GLenum = mem::transmute(self.glClientWaitSync);
6388                (func)(sync as *const _, flags, timeout)
6389            }
6390        }
6391
6392        $( $opt )? fn wait_sync(&self, sync: GLsync, flags: GLbitfield, timeout: GLuint64) {
6393
6394
6395            #[cfg(feature = "debug")] { _gl_print_debug("glWaitSync"); }
6396            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6397
6398            if self.glWaitSync == ptr::null_mut() {
6399                _gl_impl_panic("glWaitSync");
6400                return;
6401            }
6402
6403            unsafe {
6404                let func: extern "system" fn(GLsync, GLbitfield, GLuint64) = mem::transmute(self.glWaitSync);
6405                (func)(sync as *const _, flags, timeout);
6406            }
6407        }
6408
6409        $( $opt )? fn texture_range_apple(&self, target: GLenum, data: &[u8]) {
6410
6411
6412            #[cfg(feature = "debug")] { _gl_print_debug("glTextureRangeAPPLE"); }
6413            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6414
6415            if self.glTextureRangeAPPLE == ptr::null_mut() {
6416                _gl_impl_panic("glTextureRangeAPPLE");
6417                return;
6418            }
6419
6420            unsafe {
6421                let func: extern "system" fn(GLenum, GLsizei, *const c_void) = mem::transmute(self.glTextureRangeAPPLE);
6422                (func)(
6423                    target,
6424                    data.len() as GLsizei,
6425                    data.as_ptr() as *const c_void,
6426                );
6427            }
6428        }
6429
6430        $( $opt )? fn delete_sync(&self, sync: GLsync) {
6431
6432
6433            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteSync"); }
6434            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6435
6436            if self.glDeleteSync == ptr::null_mut() {
6437                _gl_impl_panic("glDeleteSync");
6438                return;
6439            }
6440
6441            unsafe {
6442                let func: extern "system" fn(GLsync) = mem::transmute(self.glDeleteSync);
6443                (func)(sync as *const _);
6444            }
6445        }
6446
6447        $( $opt )? fn gen_fences_apple(&self, n: GLsizei) -> Vec<GLuint> {
6448
6449            let mut result = vec![0 as GLuint; n as usize];
6450
6451
6452            #[cfg(feature = "debug")] { _gl_print_debug("glGenFencesAPPLE"); }
6453            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6454
6455            if self.glGenFencesAPPLE == ptr::null_mut() {
6456                _gl_impl_panic("glGenFencesAPPLE");
6457                return result;
6458            }
6459
6460            unsafe {
6461                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenFencesAPPLE);
6462                (func)(n, result.as_mut_ptr());
6463            }
6464            result
6465        }
6466
6467        $( $opt )? fn delete_fences_apple(&self, fences: &[GLuint]) {
6468
6469
6470            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteFencesAPPLE"); }
6471            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6472
6473            if self.glDeleteFencesAPPLE == ptr::null_mut() {
6474                _gl_impl_panic("glDeleteFencesAPPLE");
6475                return;
6476            }
6477
6478            unsafe {
6479                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteFencesAPPLE);
6480                (func)(fences.len() as GLsizei, fences.as_ptr());
6481            }
6482        }
6483
6484        $( $opt )? fn set_fence_apple(&self, fence: GLuint) {
6485
6486
6487            #[cfg(feature = "debug")] { _gl_print_debug("glSetFenceAPPLE"); }
6488            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6489
6490            if self.glSetFenceAPPLE == ptr::null_mut() {
6491                _gl_impl_panic("glSetFenceAPPLE");
6492                return;
6493            }
6494
6495            unsafe {
6496                let func: extern "system" fn(GLuint) = mem::transmute(self.glSetFenceAPPLE);
6497                (func)(fence);
6498            }
6499        }
6500
6501        $( $opt )? fn finish_fence_apple(&self, fence: GLuint) {
6502
6503
6504            #[cfg(feature = "debug")] { _gl_print_debug("glFinishFenceAPPLE"); }
6505            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6506
6507            if self.glFinishFenceAPPLE == ptr::null_mut() {
6508                _gl_impl_panic("glFinishFenceAPPLE");
6509                return;
6510            }
6511
6512            unsafe {
6513                let func: extern "system" fn(GLuint) = mem::transmute(self.glFinishFenceAPPLE);
6514                (func)(fence);
6515            }
6516        }
6517
6518        $( $opt )? fn test_fence_apple(&self, fence: GLuint) {
6519
6520
6521            #[cfg(feature = "debug")] { _gl_print_debug("glTestFenceAPPLE"); }
6522            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6523
6524            if self.glTestFenceAPPLE == ptr::null_mut() {
6525                _gl_impl_panic("glTestFenceAPPLE");
6526                return;
6527            }
6528
6529            unsafe {
6530                let func: extern "system" fn(GLuint) = mem::transmute(self.glTestFenceAPPLE);
6531                (func)(fence);
6532            }
6533        }
6534
6535        $( $opt )? fn test_object_apple(&self, object: GLenum, name: GLuint) -> GLboolean {
6536
6537
6538            #[cfg(feature = "debug")] { _gl_print_debug("glTestObjectAPPLE"); }
6539            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6540
6541            if self.glTestObjectAPPLE == ptr::null_mut() {
6542                _gl_impl_panic("glTestObjectAPPLE");
6543                return 0;
6544            }
6545
6546            unsafe {
6547                let func: extern "system" fn(GLenum, GLuint) -> GLboolean = mem::transmute(self.glTestObjectAPPLE);
6548                (func)(object, name)
6549            }
6550        }
6551
6552        $( $opt )? fn finish_object_apple(&self, object: GLenum, name: GLuint) {
6553
6554
6555            #[cfg(feature = "debug")] { _gl_print_debug("glFinishObjectAPPLE"); }
6556            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6557
6558            if self.glTestObjectAPPLE == ptr::null_mut() {
6559                _gl_impl_panic("glFinishObjectAPPLE");
6560                return;
6561            }
6562
6563            unsafe {
6564                // the spec has a typo for name as GLint instead of GLuint
6565                let func: extern "system" fn(GLenum, GLint) = mem::transmute(self.glFinishObjectAPPLE);
6566                (func)(object, name as GLint);
6567            }
6568        }
6569
6570        // GL_ARB_blend_func_extended
6571        $( $opt )? fn bind_frag_data_location_indexed(
6572            &self,
6573            program: GLuint,
6574            color_number: GLuint,
6575            index: GLuint,
6576            name: &str,
6577        ) {
6578
6579            #[cfg(feature = "debug")] { _gl_print_debug("glBindFragDataLocationIndexed"); }
6580            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6581
6582            if self.glBindFragDataLocationIndexed == ptr::null_mut() {
6583                _gl_impl_panic("glBindFragDataLocationIndexed");
6584                return;
6585            }
6586
6587            let c_string = encode_ascii(name);
6588
6589            unsafe {
6590                let func: extern "system" fn(GLuint, GLuint, GLuint, *const c_char) = mem::transmute(self.glBindFragDataLocationIndexed);
6591                (func)(
6592                    program,
6593                    color_number,
6594                    index,
6595                    c_string.as_ptr(),
6596                )
6597            }
6598        }
6599
6600        $( $opt )? fn get_frag_data_index(&self, program: GLuint, name: &str) -> GLint {
6601
6602
6603            #[cfg(feature = "debug")] { _gl_print_debug("glGetFragDataIndex"); }
6604            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6605
6606            if self.glGetFragDataIndex == ptr::null_mut() {
6607                _gl_impl_panic("glGetFragDataIndex");
6608                return -1;
6609            }
6610
6611            let c_string = encode_ascii(name);
6612
6613            unsafe {
6614                let func: extern "system" fn(GLuint, *const c_char) -> GLint = mem::transmute(self.glGetFragDataIndex);
6615                (func)(program, c_string.as_ptr())
6616            }
6617        }
6618
6619        // GL_KHR_debug
6620        $( $opt )? fn get_debug_messages(&self) -> Vec<DebugMessage> {
6621
6622
6623            #[cfg(feature = "debug")] { _gl_print_debug("glGetDebugMessageLog"); }
6624            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6625
6626            if self.glGetDebugMessageLog == ptr::null_mut() {
6627                _gl_impl_panic("glGetDebugMessageLog");
6628                return Vec::new();
6629            }
6630
6631            let mut max_message_len = [0];
6632            unsafe {
6633                self.get_integer_v(gl::MAX_DEBUG_MESSAGE_LENGTH, &mut max_message_len[..])
6634            }
6635
6636            let mut output = Vec::new();
6637            const CAPACITY: usize = 4;
6638
6639            let mut msg_data = vec![0u8; CAPACITY * max_message_len[0] as usize];
6640            let mut sources = [0 as GLenum; CAPACITY];
6641            let mut types = [0 as GLenum; CAPACITY];
6642            let mut severities = [0 as GLenum; CAPACITY];
6643            let mut ids = [0 as GLuint; CAPACITY];
6644            let mut lengths = [0 as GLsizei; CAPACITY];
6645
6646            loop {
6647                let count = unsafe {
6648                    let func: extern "system" fn(GLuint, GLsizei, *mut GLenum, *mut GLenum, *mut GLuint, *mut GLenum, *mut GLsizei, *mut GLchar) -> GLuint = mem::transmute(self.glGetDebugMessageLog);
6649                    (func)(
6650                        CAPACITY as _,
6651                        msg_data.len() as _,
6652                        sources.as_mut_ptr(),
6653                        types.as_mut_ptr(),
6654                        ids.as_mut_ptr(),
6655                        severities.as_mut_ptr(),
6656                        lengths.as_mut_ptr(),
6657                        msg_data.as_mut_ptr() as *mut _,
6658                    )
6659                };
6660
6661                let mut offset = 0;
6662                output.extend((0..count as usize).map(|i| {
6663                    let len = lengths[i] as usize;
6664                    let slice = &msg_data[offset..offset + len];
6665                    offset += len;
6666                    DebugMessage {
6667                        message: String::from_utf8_lossy(slice).to_string(),
6668                        source: sources[i],
6669                        ty: types[i],
6670                        id: ids[i],
6671                        severity: severities[i],
6672                    }
6673                }));
6674
6675                if (count as usize) < CAPACITY {
6676                    return output;
6677                }
6678            }
6679        }
6680
6681        $( $opt )? fn provoking_vertex_angle(&self, _mode: GLenum) {
6682
6683            #[cfg(feature = "debug")] { _gl_print_debug("glProvokingVertexAngle"); }
6684            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6685
6686            _gl_impl_panic("glProvokingVertexAngle"); // GLES only
6687            return;
6688        }
6689
6690        // GL_KHR_blend_equation_advanced
6691        $( $opt )? fn blend_barrier_khr(&self) {
6692
6693
6694            #[cfg(feature = "debug")] { _gl_print_debug("glBlendBarrierKHR"); }
6695            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6696
6697            if self.glBlendBarrierKHR == ptr::null_mut() {
6698                _gl_impl_panic("glBlendBarrierKHR");
6699                return;
6700            }
6701
6702            unsafe {
6703                let func: extern "system" fn() = mem::transmute(self.glBlendBarrierKHR);
6704                (func)();
6705            }
6706        }
6707
6708        // GL_CHROMIUM_copy_texture
6709        $( $opt )? fn copy_texture_chromium(&self,
6710            _source_id: GLuint, _source_level: GLint,
6711            _dest_target: GLenum, _dest_id: GLuint, _dest_level: GLint,
6712            _internal_format: GLint, _dest_type: GLenum,
6713            _unpack_flip_y: GLboolean, _unpack_premultiply_alpha: GLboolean, _unpack_unmultiply_alpha: GLboolean)
6714        {
6715            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTextureChromium"); }
6716            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6717
6718            _gl_impl_panic("glCopyTextureChromium"); // GLES only
6719            return;
6720        }
6721        $( $opt )? fn copy_sub_texture_chromium(&self,
6722            _source_id: GLuint, _source_level: GLint,
6723            _dest_target: GLenum, _dest_id: GLuint, _dest_level: GLint,
6724            _x_offset: GLint, _y_offset: GLint, _x: GLint, _y: GLint, _width: GLsizei, _height: GLsizei,
6725            _unpack_flip_y: GLboolean, _unpack_premultiply_alpha: GLboolean, _unpack_unmultiply_alpha: GLboolean)
6726        {
6727            #[cfg(feature = "debug")] { _gl_print_debug("glCopySubTextureChromium"); }
6728            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6729
6730            _gl_impl_panic("glCopySubTextureChromium"); // GLES only
6731            return;
6732        }
6733
6734        // GL_ANGLE_copy_texture_3d
6735        $( $opt )? fn copy_texture_3d_angle(
6736            &self,
6737            _source_id: GLuint,
6738            _source_level: GLint,
6739            _dest_target: GLenum,
6740            _dest_id: GLuint,
6741            _dest_level: GLint,
6742            _internal_format: GLint,
6743            _dest_type: GLenum,
6744            _unpack_flip_y: GLboolean,
6745            _unpack_premultiply_alpha: GLboolean,
6746            _unpack_unmultiply_alpha: GLboolean,
6747        ) {
6748
6749            #[cfg(feature = "debug")] { _gl_print_debug("glANGLECopyTexture3D"); }
6750            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6751            _gl_impl_panic("glANGLECopyTexture3D"); // ANGLE only
6752            return;
6753        }
6754
6755        $( $opt )? fn copy_sub_texture_3d_angle(
6756            &self,
6757            _source_id: GLuint,
6758            _source_level: GLint,
6759            _dest_target: GLenum,
6760            _dest_id: GLuint,
6761            _dest_level: GLint,
6762            _x_offset: GLint,
6763            _y_offset: GLint,
6764            _z_offset: GLint,
6765            _x: GLint,
6766            _y: GLint,
6767            _z: GLint,
6768            _width: GLsizei,
6769            _height: GLsizei,
6770            _depth: GLsizei,
6771            _unpack_flip_y: GLboolean,
6772            _unpack_premultiply_alpha: GLboolean,
6773            _unpack_unmultiply_alpha: GLboolean,
6774        ) {
6775
6776            #[cfg(feature = "debug")] { _gl_print_debug("glANGLECopySubTexture3D"); }
6777            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6778
6779            _gl_impl_panic("glANGLECopySubTexture3D"); // ANGLE only
6780            // return;
6781        }
6782
6783        $( $opt )? fn buffer_storage(
6784            &self,
6785            target: GLenum,
6786            size: GLsizeiptr,
6787            data: *const GLvoid,
6788            flags: GLbitfield,
6789        ) {
6790
6791            #[cfg(feature = "debug")] { _gl_print_debug("glBufferStorage"); }
6792            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6793
6794            if self.glBufferStorage == ptr::null_mut() {
6795                _gl_impl_panic("glBufferStorage");
6796                return;
6797            }
6798
6799            unsafe {
6800                let func: extern "system" fn(GLenum, GLsizeiptr, *const GLvoid, GLbitfield) = mem::transmute(self.glBufferStorage);
6801                (func)(target, size, data, flags);
6802            }
6803        }
6804
6805        $( $opt )? fn flush_mapped_buffer_range(&self, target: GLenum, offset: GLintptr, length: GLsizeiptr) {
6806
6807
6808            #[cfg(feature = "debug")] { _gl_print_debug("glFlushMappedBufferRange"); }
6809            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6810
6811            if self.glFlushMappedBufferRange == ptr::null_mut() {
6812                _gl_impl_panic("glFlushMappedBufferRange");
6813                return;
6814            }
6815
6816            unsafe {
6817                let func: extern "system" fn(GLenum, GLintptr, GLsizeiptr) = mem::transmute(self.glFlushMappedBufferRange);
6818                (func)(target, offset, length);
6819            }
6820        }
6821    };
6822}
6823
6824#[cfg(feature = "gleam_trait")]
6825impl gleam::gl::Gl for GenericGlContext {
6826    impl_gl_context!();
6827}
6828
6829#[cfg(not(feature = "gleam_trait"))]
6830#[allow(dead_code)]
6831impl GenericGlContext {
6832    impl_gl_context!(pub);
6833
6834    pub fn start_tiling_qcom(&self, x: GLuint, y: GLuint, width: GLuint, height: GLuint, preserve_mask: GLbitfield) {
6835
6836
6837        #[cfg(feature = "debug")] { _gl_print_debug("glStartTilingQCOM"); }
6838        #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6839
6840        if self.glStartTilingQCOM == ptr::null_mut() {
6841            _gl_impl_panic("glStartTilingQCOM");
6842            return;
6843        }
6844
6845        unsafe {
6846            let func: extern "system" fn(GLuint, GLuint, GLuint, GLuint, GLbitfield) = mem::transmute(self.glStartTilingQCOM);
6847            (func)(x, y, width, height, preserve_mask);
6848        }
6849    }
6850
6851    pub fn end_tiling_qcom(&self, preserve_mask: GLbitfield) {
6852
6853
6854        #[cfg(feature = "debug")] { _gl_print_debug("glEndTilingQCOM"); }
6855        #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6856
6857        if self.glEndTilingQCOM == ptr::null_mut() {
6858            _gl_impl_panic("glEndTilingQCOM");
6859            return;
6860        }
6861
6862        unsafe {
6863            let func: extern "system" fn(GLbitfield) = mem::transmute(self.glEndTilingQCOM);
6864            (func)(preserve_mask);
6865        }
6866    }
6867}
6868
6869
6870#[cfg(feature = "std")]
6871fn _gl_impl_panic(s: &str) { println!("OpenGL function not loaded: {}", s); }
6872
6873#[cfg(not(feature = "std"))]
6874#[inline(always)]
6875fn _gl_impl_panic(_s: &str) {  }
6876
6877#[cfg(feature = "debug")]
6878fn _gl_print_debug(s: &str) { println!("Called OpenGL function: {}", s); }
6879
6880#[cfg(feature = "error")]
6881fn _gl_check_for_last_error(gl: &GenericGlContext) {
6882    // if more than 20 errors occur at once, this likely indicates an infinite loop
6883    let mut error_count = 20;
6884    let mut last = gl.get_error();
6885    while last != gl::NO_ERROR && error_count > 0 {
6886        let e_string = match last {
6887            gl::INVALID_ENUM => "INVALID_ENUM".to_string(),
6888            gl::INVALID_VALUE => "INVALID_VALUE".to_string(),
6889            gl::INVALID_OPERATION => "INVALID_OPERATION".to_string(),
6890            gl::INVALID_FRAMEBUFFER_OPERATION => "INVALID_FRAMEBUFFER_OPERATION".to_string(),
6891            gl::OUT_OF_MEMORY => "OUT_OF_MEMORY".to_string(),
6892            gl::STACK_UNDERFLOW => "STACK_UNDERFLOW".to_string(),
6893            gl::STACK_OVERFLOW => "STACK_OVERFLOW".to_string(),
6894            _ => format!("Unknown error: {:0x}", last),
6895        };
6896
6897        println!("OPENGL ERROR OCCURRED: {}", e_string);
6898        last = gl.get_error();
6899        error_count -= 1;
6900    }
6901}