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)]
1548pub enum GlType {
1549    Gl,
1550    GlEs,
1551}
1552
1553pub struct GenericGlContext {
1554    pub glAccum: *mut c_void,
1555    pub glActiveTexture: *mut c_void,
1556    pub glAlphaFunc: *mut c_void,
1557    pub glAreTexturesResident: *mut c_void,
1558    pub glArrayElement: *mut c_void,
1559    pub glAttachShader: *mut c_void,
1560    pub glBegin: *mut c_void,
1561    pub glBeginConditionalRender: *mut c_void,
1562    pub glBeginQuery: *mut c_void,
1563    pub glBeginTransformFeedback: *mut c_void,
1564    pub glBindAttribLocation: *mut c_void,
1565    pub glBindBuffer: *mut c_void,
1566    pub glBindBufferBase: *mut c_void,
1567    pub glBindBufferRange: *mut c_void,
1568    pub glBindFragDataLocation: *mut c_void,
1569    pub glBindFragDataLocationIndexed: *mut c_void,
1570    pub glBindFramebuffer: *mut c_void,
1571    pub glBindRenderbuffer: *mut c_void,
1572    pub glBindSampler: *mut c_void,
1573    pub glBindTexture: *mut c_void,
1574    pub glBindVertexArray: *mut c_void,
1575    pub glBindVertexArrayAPPLE: *mut c_void,
1576    pub glBitmap: *mut c_void,
1577    pub glBlendBarrierKHR: *mut c_void,
1578    pub glBlendColor: *mut c_void,
1579    pub glBlendEquation: *mut c_void,
1580    pub glBlendEquationSeparate: *mut c_void,
1581    pub glBlendFunc: *mut c_void,
1582    pub glBlendFuncSeparate: *mut c_void,
1583    pub glBlitFramebuffer: *mut c_void,
1584    pub glBufferData: *mut c_void,
1585    pub glBufferStorage: *mut c_void,
1586    pub glBufferSubData: *mut c_void,
1587    pub glCallList: *mut c_void,
1588    pub glCallLists: *mut c_void,
1589    pub glCheckFramebufferStatus: *mut c_void,
1590    pub glClampColor: *mut c_void,
1591    pub glClear: *mut c_void,
1592    pub glClearAccum: *mut c_void,
1593    pub glClearBufferfi: *mut c_void,
1594    pub glClearBufferfv: *mut c_void,
1595    pub glClearBufferiv: *mut c_void,
1596    pub glClearBufferuiv: *mut c_void,
1597    pub glClearColor: *mut c_void,
1598    pub glClearDepth: *mut c_void,
1599    pub glClearIndex: *mut c_void,
1600    pub glClearStencil: *mut c_void,
1601    pub glClientActiveTexture: *mut c_void,
1602    pub glClientWaitSync: *mut c_void,
1603    pub glClipPlane: *mut c_void,
1604    pub glColor3b: *mut c_void,
1605    pub glColor3bv: *mut c_void,
1606    pub glColor3d: *mut c_void,
1607    pub glColor3dv: *mut c_void,
1608    pub glColor3f: *mut c_void,
1609    pub glColor3fv: *mut c_void,
1610    pub glColor3i: *mut c_void,
1611    pub glColor3iv: *mut c_void,
1612    pub glColor3s: *mut c_void,
1613    pub glColor3sv: *mut c_void,
1614    pub glColor3ub: *mut c_void,
1615    pub glColor3ubv: *mut c_void,
1616    pub glColor3ui: *mut c_void,
1617    pub glColor3uiv: *mut c_void,
1618    pub glColor3us: *mut c_void,
1619    pub glColor3usv: *mut c_void,
1620    pub glColor4b: *mut c_void,
1621    pub glColor4bv: *mut c_void,
1622    pub glColor4d: *mut c_void,
1623    pub glColor4dv: *mut c_void,
1624    pub glColor4f: *mut c_void,
1625    pub glColor4fv: *mut c_void,
1626    pub glColor4i: *mut c_void,
1627    pub glColor4iv: *mut c_void,
1628    pub glColor4s: *mut c_void,
1629    pub glColor4sv: *mut c_void,
1630    pub glColor4ub: *mut c_void,
1631    pub glColor4ubv: *mut c_void,
1632    pub glColor4ui: *mut c_void,
1633    pub glColor4uiv: *mut c_void,
1634    pub glColor4us: *mut c_void,
1635    pub glColor4usv: *mut c_void,
1636    pub glColorMask: *mut c_void,
1637    pub glColorMaski: *mut c_void,
1638    pub glColorMaterial: *mut c_void,
1639    pub glColorP3ui: *mut c_void,
1640    pub glColorP3uiv: *mut c_void,
1641    pub glColorP4ui: *mut c_void,
1642    pub glColorP4uiv: *mut c_void,
1643    pub glColorPointer: *mut c_void,
1644    pub glCompileShader: *mut c_void,
1645    pub glCompressedTexImage1D: *mut c_void,
1646    pub glCompressedTexImage2D: *mut c_void,
1647    pub glCompressedTexImage3D: *mut c_void,
1648    pub glCompressedTexSubImage1D: *mut c_void,
1649    pub glCompressedTexSubImage2D: *mut c_void,
1650    pub glCompressedTexSubImage3D: *mut c_void,
1651    pub glCopyBufferSubData: *mut c_void,
1652    pub glCopyImageSubData: *mut c_void,
1653    pub glCopyPixels: *mut c_void,
1654    pub glCopyTexImage1D: *mut c_void,
1655    pub glCopyTexImage2D: *mut c_void,
1656    pub glCopyTexSubImage1D: *mut c_void,
1657    pub glCopyTexSubImage2D: *mut c_void,
1658    pub glCopyTexSubImage3D: *mut c_void,
1659    pub glCreateProgram: *mut c_void,
1660    pub glCreateShader: *mut c_void,
1661    pub glCullFace: *mut c_void,
1662    pub glDebugMessageCallback: *mut c_void,
1663    pub glDebugMessageCallbackKHR: *mut c_void,
1664    pub glDebugMessageControl: *mut c_void,
1665    pub glDebugMessageControlKHR: *mut c_void,
1666    pub glDebugMessageInsert: *mut c_void,
1667    pub glDebugMessageInsertKHR: *mut c_void,
1668    pub glDeleteBuffers: *mut c_void,
1669    pub glDeleteFencesAPPLE: *mut c_void,
1670    pub glDeleteFramebuffers: *mut c_void,
1671    pub glDeleteLists: *mut c_void,
1672    pub glDeleteProgram: *mut c_void,
1673    pub glDeleteQueries: *mut c_void,
1674    pub glDeleteRenderbuffers: *mut c_void,
1675    pub glDeleteSamplers: *mut c_void,
1676    pub glDeleteShader: *mut c_void,
1677    pub glDeleteSync: *mut c_void,
1678    pub glDeleteTextures: *mut c_void,
1679    pub glDeleteVertexArrays: *mut c_void,
1680    pub glDeleteVertexArraysAPPLE: *mut c_void,
1681    pub glDepthFunc: *mut c_void,
1682    pub glDepthMask: *mut c_void,
1683    pub glDepthRange: *mut c_void,
1684    pub glDetachShader: *mut c_void,
1685    pub glDisable: *mut c_void,
1686    pub glDisableClientState: *mut c_void,
1687    pub glDisableVertexAttribArray: *mut c_void,
1688    pub glDisablei: *mut c_void,
1689    pub glDrawArrays: *mut c_void,
1690    pub glDrawArraysInstanced: *mut c_void,
1691    pub glDrawBuffer: *mut c_void,
1692    pub glDrawBuffers: *mut c_void,
1693    pub glDrawElements: *mut c_void,
1694    pub glDrawElementsBaseVertex: *mut c_void,
1695    pub glDrawElementsInstanced: *mut c_void,
1696    pub glDrawElementsInstancedBaseVertex: *mut c_void,
1697    pub glDrawPixels: *mut c_void,
1698    pub glDrawRangeElements: *mut c_void,
1699    pub glDrawRangeElementsBaseVertex: *mut c_void,
1700    pub glEdgeFlag: *mut c_void,
1701    pub glEdgeFlagPointer: *mut c_void,
1702    pub glEdgeFlagv: *mut c_void,
1703    pub glEnable: *mut c_void,
1704    pub glEnableClientState: *mut c_void,
1705    pub glEnableVertexAttribArray: *mut c_void,
1706    pub glEnablei: *mut c_void,
1707    pub glEnd: *mut c_void,
1708    pub glEndConditionalRender: *mut c_void,
1709    pub glEndList: *mut c_void,
1710    pub glEndQuery: *mut c_void,
1711    pub glEndTransformFeedback: *mut c_void,
1712    pub glEvalCoord1d: *mut c_void,
1713    pub glEvalCoord1dv: *mut c_void,
1714    pub glEvalCoord1f: *mut c_void,
1715    pub glEvalCoord1fv: *mut c_void,
1716    pub glEvalCoord2d: *mut c_void,
1717    pub glEvalCoord2dv: *mut c_void,
1718    pub glEvalCoord2f: *mut c_void,
1719    pub glEvalCoord2fv: *mut c_void,
1720    pub glEvalMesh1: *mut c_void,
1721    pub glEvalMesh2: *mut c_void,
1722    pub glEvalPoint1: *mut c_void,
1723    pub glEvalPoint2: *mut c_void,
1724    pub glFeedbackBuffer: *mut c_void,
1725    pub glFenceSync: *mut c_void,
1726    pub glFinish: *mut c_void,
1727    pub glFinishFenceAPPLE: *mut c_void,
1728    pub glFinishObjectAPPLE: *mut c_void,
1729    pub glFlush: *mut c_void,
1730    pub glFlushMappedBufferRange: *mut c_void,
1731    pub glFogCoordPointer: *mut c_void,
1732    pub glFogCoordd: *mut c_void,
1733    pub glFogCoorddv: *mut c_void,
1734    pub glFogCoordf: *mut c_void,
1735    pub glFogCoordfv: *mut c_void,
1736    pub glFogf: *mut c_void,
1737    pub glFogfv: *mut c_void,
1738    pub glFogi: *mut c_void,
1739    pub glFogiv: *mut c_void,
1740    pub glFramebufferRenderbuffer: *mut c_void,
1741    pub glFramebufferTexture: *mut c_void,
1742    pub glFramebufferTexture1D: *mut c_void,
1743    pub glFramebufferTexture2D: *mut c_void,
1744    pub glFramebufferTexture3D: *mut c_void,
1745    pub glFramebufferTextureLayer: *mut c_void,
1746    pub glFrontFace: *mut c_void,
1747    pub glFrustum: *mut c_void,
1748    pub glGenBuffers: *mut c_void,
1749    pub glGenFencesAPPLE: *mut c_void,
1750    pub glGenFramebuffers: *mut c_void,
1751    pub glGenLists: *mut c_void,
1752    pub glGenQueries: *mut c_void,
1753    pub glGenRenderbuffers: *mut c_void,
1754    pub glGenSamplers: *mut c_void,
1755    pub glGenTextures: *mut c_void,
1756    pub glGenVertexArrays: *mut c_void,
1757    pub glGenVertexArraysAPPLE: *mut c_void,
1758    pub glGenerateMipmap: *mut c_void,
1759    pub glGetActiveAttrib: *mut c_void,
1760    pub glGetActiveUniform: *mut c_void,
1761    pub glGetActiveUniformBlockName: *mut c_void,
1762    pub glGetActiveUniformBlockiv: *mut c_void,
1763    pub glGetActiveUniformName: *mut c_void,
1764    pub glGetActiveUniformsiv: *mut c_void,
1765    pub glGetAttachedShaders: *mut c_void,
1766    pub glGetAttribLocation: *mut c_void,
1767    pub glGetBooleani_v: *mut c_void,
1768    pub glGetBooleanv: *mut c_void,
1769    pub glGetBufferParameteri64v: *mut c_void,
1770    pub glGetBufferParameteriv: *mut c_void,
1771    pub glGetBufferPointerv: *mut c_void,
1772    pub glGetBufferSubData: *mut c_void,
1773    pub glGetClipPlane: *mut c_void,
1774    pub glGetCompressedTexImage: *mut c_void,
1775    pub glGetDebugMessageLog: *mut c_void,
1776    pub glGetDebugMessageLogKHR: *mut c_void,
1777    pub glGetDoublev: *mut c_void,
1778    pub glGetError: *mut c_void,
1779    pub glGetFloatv: *mut c_void,
1780    pub glGetFragDataIndex: *mut c_void,
1781    pub glGetFragDataLocation: *mut c_void,
1782    pub glGetFramebufferAttachmentParameteriv: *mut c_void,
1783    pub glGetInteger64i_v: *mut c_void,
1784    pub glGetInteger64v: *mut c_void,
1785    pub glGetIntegeri_v: *mut c_void,
1786    pub glGetIntegerv: *mut c_void,
1787    pub glGetLightfv: *mut c_void,
1788    pub glGetLightiv: *mut c_void,
1789    pub glGetMapdv: *mut c_void,
1790    pub glGetMapfv: *mut c_void,
1791    pub glGetMapiv: *mut c_void,
1792    pub glGetMaterialfv: *mut c_void,
1793    pub glGetMaterialiv: *mut c_void,
1794    pub glGetMultisamplefv: *mut c_void,
1795    pub glGetObjectLabel: *mut c_void,
1796    pub glGetObjectLabelKHR: *mut c_void,
1797    pub glGetObjectPtrLabel: *mut c_void,
1798    pub glGetObjectPtrLabelKHR: *mut c_void,
1799    pub glGetPixelMapfv: *mut c_void,
1800    pub glGetPixelMapuiv: *mut c_void,
1801    pub glGetPixelMapusv: *mut c_void,
1802    pub glGetPointerv: *mut c_void,
1803    pub glGetPointervKHR: *mut c_void,
1804    pub glGetPolygonStipple: *mut c_void,
1805    pub glGetProgramBinary: *mut c_void,
1806    pub glGetProgramInfoLog: *mut c_void,
1807    pub glGetProgramiv: *mut c_void,
1808    pub glGetQueryObjecti64v: *mut c_void,
1809    pub glGetQueryObjectiv: *mut c_void,
1810    pub glGetQueryObjectui64v: *mut c_void,
1811    pub glGetQueryObjectuiv: *mut c_void,
1812    pub glGetQueryiv: *mut c_void,
1813    pub glGetRenderbufferParameteriv: *mut c_void,
1814    pub glGetSamplerParameterIiv: *mut c_void,
1815    pub glGetSamplerParameterIuiv: *mut c_void,
1816    pub glGetSamplerParameterfv: *mut c_void,
1817    pub glGetSamplerParameteriv: *mut c_void,
1818    pub glGetShaderInfoLog: *mut c_void,
1819    pub glGetShaderSource: *mut c_void,
1820    pub glGetShaderiv: *mut c_void,
1821    pub glGetString: *mut c_void,
1822    pub glGetStringi: *mut c_void,
1823    pub glGetSynciv: *mut c_void,
1824    pub glGetTexEnvfv: *mut c_void,
1825    pub glGetTexEnviv: *mut c_void,
1826    pub glGetTexGendv: *mut c_void,
1827    pub glGetTexGenfv: *mut c_void,
1828    pub glGetTexGeniv: *mut c_void,
1829    pub glGetTexImage: *mut c_void,
1830    pub glGetTexLevelParameterfv: *mut c_void,
1831    pub glGetTexLevelParameteriv: *mut c_void,
1832    pub glGetTexParameterIiv: *mut c_void,
1833    pub glGetTexParameterIuiv: *mut c_void,
1834    pub glGetTexParameterPointervAPPLE: *mut c_void,
1835    pub glGetTexParameterfv: *mut c_void,
1836    pub glGetTexParameteriv: *mut c_void,
1837    pub glGetTransformFeedbackVarying: *mut c_void,
1838    pub glGetUniformBlockIndex: *mut c_void,
1839    pub glGetUniformIndices: *mut c_void,
1840    pub glGetUniformLocation: *mut c_void,
1841    pub glGetUniformfv: *mut c_void,
1842    pub glGetUniformiv: *mut c_void,
1843    pub glGetUniformuiv: *mut c_void,
1844    pub glGetVertexAttribIiv: *mut c_void,
1845    pub glGetVertexAttribIuiv: *mut c_void,
1846    pub glGetVertexAttribPointerv: *mut c_void,
1847    pub glGetVertexAttribdv: *mut c_void,
1848    pub glGetVertexAttribfv: *mut c_void,
1849    pub glGetVertexAttribiv: *mut c_void,
1850    pub glHint: *mut c_void,
1851    pub glIndexMask: *mut c_void,
1852    pub glIndexPointer: *mut c_void,
1853    pub glIndexd: *mut c_void,
1854    pub glIndexdv: *mut c_void,
1855    pub glIndexf: *mut c_void,
1856    pub glIndexfv: *mut c_void,
1857    pub glIndexi: *mut c_void,
1858    pub glIndexiv: *mut c_void,
1859    pub glIndexs: *mut c_void,
1860    pub glIndexsv: *mut c_void,
1861    pub glIndexub: *mut c_void,
1862    pub glIndexubv: *mut c_void,
1863    pub glInitNames: *mut c_void,
1864    pub glInsertEventMarkerEXT: *mut c_void,
1865    pub glInterleavedArrays: *mut c_void,
1866    pub glInvalidateBufferData: *mut c_void,
1867    pub glInvalidateBufferSubData: *mut c_void,
1868    pub glInvalidateFramebuffer: *mut c_void,
1869    pub glInvalidateSubFramebuffer: *mut c_void,
1870    pub glInvalidateTexImage: *mut c_void,
1871    pub glInvalidateTexSubImage: *mut c_void,
1872    pub glIsBuffer: *mut c_void,
1873    pub glIsEnabled: *mut c_void,
1874    pub glIsEnabledi: *mut c_void,
1875    pub glIsFenceAPPLE: *mut c_void,
1876    pub glIsFramebuffer: *mut c_void,
1877    pub glIsList: *mut c_void,
1878    pub glIsProgram: *mut c_void,
1879    pub glIsQuery: *mut c_void,
1880    pub glIsRenderbuffer: *mut c_void,
1881    pub glIsSampler: *mut c_void,
1882    pub glIsShader: *mut c_void,
1883    pub glIsSync: *mut c_void,
1884    pub glIsTexture: *mut c_void,
1885    pub glIsVertexArray: *mut c_void,
1886    pub glIsVertexArrayAPPLE: *mut c_void,
1887    pub glLightModelf: *mut c_void,
1888    pub glLightModelfv: *mut c_void,
1889    pub glLightModeli: *mut c_void,
1890    pub glLightModeliv: *mut c_void,
1891    pub glLightf: *mut c_void,
1892    pub glLightfv: *mut c_void,
1893    pub glLighti: *mut c_void,
1894    pub glLightiv: *mut c_void,
1895    pub glLineStipple: *mut c_void,
1896    pub glLineWidth: *mut c_void,
1897    pub glLinkProgram: *mut c_void,
1898    pub glListBase: *mut c_void,
1899    pub glLoadIdentity: *mut c_void,
1900    pub glLoadMatrixd: *mut c_void,
1901    pub glLoadMatrixf: *mut c_void,
1902    pub glLoadName: *mut c_void,
1903    pub glLoadTransposeMatrixd: *mut c_void,
1904    pub glLoadTransposeMatrixf: *mut c_void,
1905    pub glLogicOp: *mut c_void,
1906    pub glMap1d: *mut c_void,
1907    pub glMap1f: *mut c_void,
1908    pub glMap2d: *mut c_void,
1909    pub glMap2f: *mut c_void,
1910    pub glMapBuffer: *mut c_void,
1911    pub glMapBufferRange: *mut c_void,
1912    pub glMapGrid1d: *mut c_void,
1913    pub glMapGrid1f: *mut c_void,
1914    pub glMapGrid2d: *mut c_void,
1915    pub glMapGrid2f: *mut c_void,
1916    pub glMaterialf: *mut c_void,
1917    pub glMaterialfv: *mut c_void,
1918    pub glMateriali: *mut c_void,
1919    pub glMaterialiv: *mut c_void,
1920    pub glMatrixMode: *mut c_void,
1921    pub glMultMatrixd: *mut c_void,
1922    pub glMultMatrixf: *mut c_void,
1923    pub glMultTransposeMatrixd: *mut c_void,
1924    pub glMultTransposeMatrixf: *mut c_void,
1925    pub glMultiDrawArrays: *mut c_void,
1926    pub glMultiDrawElements: *mut c_void,
1927    pub glMultiDrawElementsBaseVertex: *mut c_void,
1928    pub glMultiTexCoord1d: *mut c_void,
1929    pub glMultiTexCoord1dv: *mut c_void,
1930    pub glMultiTexCoord1f: *mut c_void,
1931    pub glMultiTexCoord1fv: *mut c_void,
1932    pub glMultiTexCoord1i: *mut c_void,
1933    pub glMultiTexCoord1iv: *mut c_void,
1934    pub glMultiTexCoord1s: *mut c_void,
1935    pub glMultiTexCoord1sv: *mut c_void,
1936    pub glMultiTexCoord2d: *mut c_void,
1937    pub glMultiTexCoord2dv: *mut c_void,
1938    pub glMultiTexCoord2f: *mut c_void,
1939    pub glMultiTexCoord2fv: *mut c_void,
1940    pub glMultiTexCoord2i: *mut c_void,
1941    pub glMultiTexCoord2iv: *mut c_void,
1942    pub glMultiTexCoord2s: *mut c_void,
1943    pub glMultiTexCoord2sv: *mut c_void,
1944    pub glMultiTexCoord3d: *mut c_void,
1945    pub glMultiTexCoord3dv: *mut c_void,
1946    pub glMultiTexCoord3f: *mut c_void,
1947    pub glMultiTexCoord3fv: *mut c_void,
1948    pub glMultiTexCoord3i: *mut c_void,
1949    pub glMultiTexCoord3iv: *mut c_void,
1950    pub glMultiTexCoord3s: *mut c_void,
1951    pub glMultiTexCoord3sv: *mut c_void,
1952    pub glMultiTexCoord4d: *mut c_void,
1953    pub glMultiTexCoord4dv: *mut c_void,
1954    pub glMultiTexCoord4f: *mut c_void,
1955    pub glMultiTexCoord4fv: *mut c_void,
1956    pub glMultiTexCoord4i: *mut c_void,
1957    pub glMultiTexCoord4iv: *mut c_void,
1958    pub glMultiTexCoord4s: *mut c_void,
1959    pub glMultiTexCoord4sv: *mut c_void,
1960    pub glMultiTexCoordP1ui: *mut c_void,
1961    pub glMultiTexCoordP1uiv: *mut c_void,
1962    pub glMultiTexCoordP2ui: *mut c_void,
1963    pub glMultiTexCoordP2uiv: *mut c_void,
1964    pub glMultiTexCoordP3ui: *mut c_void,
1965    pub glMultiTexCoordP3uiv: *mut c_void,
1966    pub glMultiTexCoordP4ui: *mut c_void,
1967    pub glMultiTexCoordP4uiv: *mut c_void,
1968    pub glNewList: *mut c_void,
1969    pub glNormal3b: *mut c_void,
1970    pub glNormal3bv: *mut c_void,
1971    pub glNormal3d: *mut c_void,
1972    pub glNormal3dv: *mut c_void,
1973    pub glNormal3f: *mut c_void,
1974    pub glNormal3fv: *mut c_void,
1975    pub glNormal3i: *mut c_void,
1976    pub glNormal3iv: *mut c_void,
1977    pub glNormal3s: *mut c_void,
1978    pub glNormal3sv: *mut c_void,
1979    pub glNormalP3ui: *mut c_void,
1980    pub glNormalP3uiv: *mut c_void,
1981    pub glNormalPointer: *mut c_void,
1982    pub glObjectLabel: *mut c_void,
1983    pub glObjectLabelKHR: *mut c_void,
1984    pub glObjectPtrLabel: *mut c_void,
1985    pub glObjectPtrLabelKHR: *mut c_void,
1986    pub glOrtho: *mut c_void,
1987    pub glPassThrough: *mut c_void,
1988    pub glPixelMapfv: *mut c_void,
1989    pub glPixelMapuiv: *mut c_void,
1990    pub glPixelMapusv: *mut c_void,
1991    pub glPixelStoref: *mut c_void,
1992    pub glPixelStorei: *mut c_void,
1993    pub glPixelTransferf: *mut c_void,
1994    pub glPixelTransferi: *mut c_void,
1995    pub glPixelZoom: *mut c_void,
1996    pub glPointParameterf: *mut c_void,
1997    pub glPointParameterfv: *mut c_void,
1998    pub glPointParameteri: *mut c_void,
1999    pub glPointParameteriv: *mut c_void,
2000    pub glPointSize: *mut c_void,
2001    pub glPolygonMode: *mut c_void,
2002    pub glPolygonOffset: *mut c_void,
2003    pub glPolygonStipple: *mut c_void,
2004    pub glPopAttrib: *mut c_void,
2005    pub glPopClientAttrib: *mut c_void,
2006    pub glPopDebugGroup: *mut c_void,
2007    pub glPopDebugGroupKHR: *mut c_void,
2008    pub glPopGroupMarkerEXT: *mut c_void,
2009    pub glPopMatrix: *mut c_void,
2010    pub glPopName: *mut c_void,
2011    pub glPrimitiveRestartIndex: *mut c_void,
2012    pub glPrioritizeTextures: *mut c_void,
2013    pub glProgramBinary: *mut c_void,
2014    pub glProgramParameteri: *mut c_void,
2015    pub glProvokingVertex: *mut c_void,
2016    pub glPushAttrib: *mut c_void,
2017    pub glPushClientAttrib: *mut c_void,
2018    pub glPushDebugGroup: *mut c_void,
2019    pub glPushDebugGroupKHR: *mut c_void,
2020    pub glPushGroupMarkerEXT: *mut c_void,
2021    pub glPushMatrix: *mut c_void,
2022    pub glPushName: *mut c_void,
2023    pub glQueryCounter: *mut c_void,
2024    pub glRasterPos2d: *mut c_void,
2025    pub glRasterPos2dv: *mut c_void,
2026    pub glRasterPos2f: *mut c_void,
2027    pub glRasterPos2fv: *mut c_void,
2028    pub glRasterPos2i: *mut c_void,
2029    pub glRasterPos2iv: *mut c_void,
2030    pub glRasterPos2s: *mut c_void,
2031    pub glRasterPos2sv: *mut c_void,
2032    pub glRasterPos3d: *mut c_void,
2033    pub glRasterPos3dv: *mut c_void,
2034    pub glRasterPos3f: *mut c_void,
2035    pub glRasterPos3fv: *mut c_void,
2036    pub glRasterPos3i: *mut c_void,
2037    pub glRasterPos3iv: *mut c_void,
2038    pub glRasterPos3s: *mut c_void,
2039    pub glRasterPos3sv: *mut c_void,
2040    pub glRasterPos4d: *mut c_void,
2041    pub glRasterPos4dv: *mut c_void,
2042    pub glRasterPos4f: *mut c_void,
2043    pub glRasterPos4fv: *mut c_void,
2044    pub glRasterPos4i: *mut c_void,
2045    pub glRasterPos4iv: *mut c_void,
2046    pub glRasterPos4s: *mut c_void,
2047    pub glRasterPos4sv: *mut c_void,
2048    pub glReadBuffer: *mut c_void,
2049    pub glReadPixels: *mut c_void,
2050    pub glRectd: *mut c_void,
2051    pub glRectdv: *mut c_void,
2052    pub glRectf: *mut c_void,
2053    pub glRectfv: *mut c_void,
2054    pub glRecti: *mut c_void,
2055    pub glRectiv: *mut c_void,
2056    pub glRects: *mut c_void,
2057    pub glRectsv: *mut c_void,
2058    pub glRenderMode: *mut c_void,
2059    pub glRenderbufferStorage: *mut c_void,
2060    pub glRenderbufferStorageMultisample: *mut c_void,
2061    pub glRotated: *mut c_void,
2062    pub glRotatef: *mut c_void,
2063    pub glSampleCoverage: *mut c_void,
2064    pub glSampleMaski: *mut c_void,
2065    pub glSamplerParameterIiv: *mut c_void,
2066    pub glSamplerParameterIuiv: *mut c_void,
2067    pub glSamplerParameterf: *mut c_void,
2068    pub glSamplerParameterfv: *mut c_void,
2069    pub glSamplerParameteri: *mut c_void,
2070    pub glSamplerParameteriv: *mut c_void,
2071    pub glScaled: *mut c_void,
2072    pub glScalef: *mut c_void,
2073    pub glScissor: *mut c_void,
2074    pub glSecondaryColor3b: *mut c_void,
2075    pub glSecondaryColor3bv: *mut c_void,
2076    pub glSecondaryColor3d: *mut c_void,
2077    pub glSecondaryColor3dv: *mut c_void,
2078    pub glSecondaryColor3f: *mut c_void,
2079    pub glSecondaryColor3fv: *mut c_void,
2080    pub glSecondaryColor3i: *mut c_void,
2081    pub glSecondaryColor3iv: *mut c_void,
2082    pub glSecondaryColor3s: *mut c_void,
2083    pub glSecondaryColor3sv: *mut c_void,
2084    pub glSecondaryColor3ub: *mut c_void,
2085    pub glSecondaryColor3ubv: *mut c_void,
2086    pub glSecondaryColor3ui: *mut c_void,
2087    pub glSecondaryColor3uiv: *mut c_void,
2088    pub glSecondaryColor3us: *mut c_void,
2089    pub glSecondaryColor3usv: *mut c_void,
2090    pub glSecondaryColorP3ui: *mut c_void,
2091    pub glSecondaryColorP3uiv: *mut c_void,
2092    pub glSecondaryColorPointer: *mut c_void,
2093    pub glSelectBuffer: *mut c_void,
2094    pub glSetFenceAPPLE: *mut c_void,
2095    pub glShadeModel: *mut c_void,
2096    pub glShaderSource: *mut c_void,
2097    pub glShaderStorageBlockBinding: *mut c_void,
2098    pub glStencilFunc: *mut c_void,
2099    pub glStencilFuncSeparate: *mut c_void,
2100    pub glStencilMask: *mut c_void,
2101    pub glStencilMaskSeparate: *mut c_void,
2102    pub glStencilOp: *mut c_void,
2103    pub glStencilOpSeparate: *mut c_void,
2104    pub glTestFenceAPPLE: *mut c_void,
2105    pub glTestObjectAPPLE: *mut c_void,
2106    pub glTexBuffer: *mut c_void,
2107    pub glTexCoord1d: *mut c_void,
2108    pub glTexCoord1dv: *mut c_void,
2109    pub glTexCoord1f: *mut c_void,
2110    pub glTexCoord1fv: *mut c_void,
2111    pub glTexCoord1i: *mut c_void,
2112    pub glTexCoord1iv: *mut c_void,
2113    pub glTexCoord1s: *mut c_void,
2114    pub glTexCoord1sv: *mut c_void,
2115    pub glTexCoord2d: *mut c_void,
2116    pub glTexCoord2dv: *mut c_void,
2117    pub glTexCoord2f: *mut c_void,
2118    pub glTexCoord2fv: *mut c_void,
2119    pub glTexCoord2i: *mut c_void,
2120    pub glTexCoord2iv: *mut c_void,
2121    pub glTexCoord2s: *mut c_void,
2122    pub glTexCoord2sv: *mut c_void,
2123    pub glTexCoord3d: *mut c_void,
2124    pub glTexCoord3dv: *mut c_void,
2125    pub glTexCoord3f: *mut c_void,
2126    pub glTexCoord3fv: *mut c_void,
2127    pub glTexCoord3i: *mut c_void,
2128    pub glTexCoord3iv: *mut c_void,
2129    pub glTexCoord3s: *mut c_void,
2130    pub glTexCoord3sv: *mut c_void,
2131    pub glTexCoord4d: *mut c_void,
2132    pub glTexCoord4dv: *mut c_void,
2133    pub glTexCoord4f: *mut c_void,
2134    pub glTexCoord4fv: *mut c_void,
2135    pub glTexCoord4i: *mut c_void,
2136    pub glTexCoord4iv: *mut c_void,
2137    pub glTexCoord4s: *mut c_void,
2138    pub glTexCoord4sv: *mut c_void,
2139    pub glTexCoordP1ui: *mut c_void,
2140    pub glTexCoordP1uiv: *mut c_void,
2141    pub glTexCoordP2ui: *mut c_void,
2142    pub glTexCoordP2uiv: *mut c_void,
2143    pub glTexCoordP3ui: *mut c_void,
2144    pub glTexCoordP3uiv: *mut c_void,
2145    pub glTexCoordP4ui: *mut c_void,
2146    pub glTexCoordP4uiv: *mut c_void,
2147    pub glTexCoordPointer: *mut c_void,
2148    pub glTexEnvf: *mut c_void,
2149    pub glTexEnvfv: *mut c_void,
2150    pub glTexEnvi: *mut c_void,
2151    pub glTexEnviv: *mut c_void,
2152    pub glTexGend: *mut c_void,
2153    pub glTexGendv: *mut c_void,
2154    pub glTexGenf: *mut c_void,
2155    pub glTexGenfv: *mut c_void,
2156    pub glTexGeni: *mut c_void,
2157    pub glTexGeniv: *mut c_void,
2158    pub glTexImage1D: *mut c_void,
2159    pub glTexImage2D: *mut c_void,
2160    pub glTexImage2DMultisample: *mut c_void,
2161    pub glTexImage3D: *mut c_void,
2162    pub glTexImage3DMultisample: *mut c_void,
2163    pub glTexParameterIiv: *mut c_void,
2164    pub glTexParameterIuiv: *mut c_void,
2165    pub glTexParameterf: *mut c_void,
2166    pub glTexParameterfv: *mut c_void,
2167    pub glTexParameteri: *mut c_void,
2168    pub glTexParameteriv: *mut c_void,
2169    pub glTexStorage1D: *mut c_void,
2170    pub glTexStorage2D: *mut c_void,
2171    pub glTexStorage3D: *mut c_void,
2172    pub glTexSubImage1D: *mut c_void,
2173    pub glTexSubImage2D: *mut c_void,
2174    pub glTexSubImage3D: *mut c_void,
2175    pub glTextureRangeAPPLE: *mut c_void,
2176    pub glTransformFeedbackVaryings: *mut c_void,
2177    pub glTranslated: *mut c_void,
2178    pub glTranslatef: *mut c_void,
2179    pub glUniform1f: *mut c_void,
2180    pub glUniform1fv: *mut c_void,
2181    pub glUniform1i: *mut c_void,
2182    pub glUniform1iv: *mut c_void,
2183    pub glUniform1ui: *mut c_void,
2184    pub glUniform1uiv: *mut c_void,
2185    pub glUniform2f: *mut c_void,
2186    pub glUniform2fv: *mut c_void,
2187    pub glUniform2i: *mut c_void,
2188    pub glUniform2iv: *mut c_void,
2189    pub glUniform2ui: *mut c_void,
2190    pub glUniform2uiv: *mut c_void,
2191    pub glUniform3f: *mut c_void,
2192    pub glUniform3fv: *mut c_void,
2193    pub glUniform3i: *mut c_void,
2194    pub glUniform3iv: *mut c_void,
2195    pub glUniform3ui: *mut c_void,
2196    pub glUniform3uiv: *mut c_void,
2197    pub glUniform4f: *mut c_void,
2198    pub glUniform4fv: *mut c_void,
2199    pub glUniform4i: *mut c_void,
2200    pub glUniform4iv: *mut c_void,
2201    pub glUniform4ui: *mut c_void,
2202    pub glUniform4uiv: *mut c_void,
2203    pub glUniformBlockBinding: *mut c_void,
2204    pub glUniformMatrix2fv: *mut c_void,
2205    pub glUniformMatrix2x3fv: *mut c_void,
2206    pub glUniformMatrix2x4fv: *mut c_void,
2207    pub glUniformMatrix3fv: *mut c_void,
2208    pub glUniformMatrix3x2fv: *mut c_void,
2209    pub glUniformMatrix3x4fv: *mut c_void,
2210    pub glUniformMatrix4fv: *mut c_void,
2211    pub glUniformMatrix4x2fv: *mut c_void,
2212    pub glUniformMatrix4x3fv: *mut c_void,
2213    pub glUnmapBuffer: *mut c_void,
2214    pub glUseProgram: *mut c_void,
2215    pub glValidateProgram: *mut c_void,
2216    pub glVertex2d: *mut c_void,
2217    pub glVertex2dv: *mut c_void,
2218    pub glVertex2f: *mut c_void,
2219    pub glVertex2fv: *mut c_void,
2220    pub glVertex2i: *mut c_void,
2221    pub glVertex2iv: *mut c_void,
2222    pub glVertex2s: *mut c_void,
2223    pub glVertex2sv: *mut c_void,
2224    pub glVertex3d: *mut c_void,
2225    pub glVertex3dv: *mut c_void,
2226    pub glVertex3f: *mut c_void,
2227    pub glVertex3fv: *mut c_void,
2228    pub glVertex3i: *mut c_void,
2229    pub glVertex3iv: *mut c_void,
2230    pub glVertex3s: *mut c_void,
2231    pub glVertex3sv: *mut c_void,
2232    pub glVertex4d: *mut c_void,
2233    pub glVertex4dv: *mut c_void,
2234    pub glVertex4f: *mut c_void,
2235    pub glVertex4fv: *mut c_void,
2236    pub glVertex4i: *mut c_void,
2237    pub glVertex4iv: *mut c_void,
2238    pub glVertex4s: *mut c_void,
2239    pub glVertex4sv: *mut c_void,
2240    pub glVertexAttrib1d: *mut c_void,
2241    pub glVertexAttrib1dv: *mut c_void,
2242    pub glVertexAttrib1f: *mut c_void,
2243    pub glVertexAttrib1fv: *mut c_void,
2244    pub glVertexAttrib1s: *mut c_void,
2245    pub glVertexAttrib1sv: *mut c_void,
2246    pub glVertexAttrib2d: *mut c_void,
2247    pub glVertexAttrib2dv: *mut c_void,
2248    pub glVertexAttrib2f: *mut c_void,
2249    pub glVertexAttrib2fv: *mut c_void,
2250    pub glVertexAttrib2s: *mut c_void,
2251    pub glVertexAttrib2sv: *mut c_void,
2252    pub glVertexAttrib3d: *mut c_void,
2253    pub glVertexAttrib3dv: *mut c_void,
2254    pub glVertexAttrib3f: *mut c_void,
2255    pub glVertexAttrib3fv: *mut c_void,
2256    pub glVertexAttrib3s: *mut c_void,
2257    pub glVertexAttrib3sv: *mut c_void,
2258    pub glVertexAttrib4Nbv: *mut c_void,
2259    pub glVertexAttrib4Niv: *mut c_void,
2260    pub glVertexAttrib4Nsv: *mut c_void,
2261    pub glVertexAttrib4Nub: *mut c_void,
2262    pub glVertexAttrib4Nubv: *mut c_void,
2263    pub glVertexAttrib4Nuiv: *mut c_void,
2264    pub glVertexAttrib4Nusv: *mut c_void,
2265    pub glVertexAttrib4bv: *mut c_void,
2266    pub glVertexAttrib4d: *mut c_void,
2267    pub glVertexAttrib4dv: *mut c_void,
2268    pub glVertexAttrib4f: *mut c_void,
2269    pub glVertexAttrib4fv: *mut c_void,
2270    pub glVertexAttrib4iv: *mut c_void,
2271    pub glVertexAttrib4s: *mut c_void,
2272    pub glVertexAttrib4sv: *mut c_void,
2273    pub glVertexAttrib4ubv: *mut c_void,
2274    pub glVertexAttrib4uiv: *mut c_void,
2275    pub glVertexAttrib4usv: *mut c_void,
2276    pub glVertexAttribDivisor: *mut c_void,
2277    pub glVertexAttribI1i: *mut c_void,
2278    pub glVertexAttribI1iv: *mut c_void,
2279    pub glVertexAttribI1ui: *mut c_void,
2280    pub glVertexAttribI1uiv: *mut c_void,
2281    pub glVertexAttribI2i: *mut c_void,
2282    pub glVertexAttribI2iv: *mut c_void,
2283    pub glVertexAttribI2ui: *mut c_void,
2284    pub glVertexAttribI2uiv: *mut c_void,
2285    pub glVertexAttribI3i: *mut c_void,
2286    pub glVertexAttribI3iv: *mut c_void,
2287    pub glVertexAttribI3ui: *mut c_void,
2288    pub glVertexAttribI3uiv: *mut c_void,
2289    pub glVertexAttribI4bv: *mut c_void,
2290    pub glVertexAttribI4i: *mut c_void,
2291    pub glVertexAttribI4iv: *mut c_void,
2292    pub glVertexAttribI4sv: *mut c_void,
2293    pub glVertexAttribI4ubv: *mut c_void,
2294    pub glVertexAttribI4ui: *mut c_void,
2295    pub glVertexAttribI4uiv: *mut c_void,
2296    pub glVertexAttribI4usv: *mut c_void,
2297    pub glVertexAttribIPointer: *mut c_void,
2298    pub glVertexAttribP1ui: *mut c_void,
2299    pub glVertexAttribP1uiv: *mut c_void,
2300    pub glVertexAttribP2ui: *mut c_void,
2301    pub glVertexAttribP2uiv: *mut c_void,
2302    pub glVertexAttribP3ui: *mut c_void,
2303    pub glVertexAttribP3uiv: *mut c_void,
2304    pub glVertexAttribP4ui: *mut c_void,
2305    pub glVertexAttribP4uiv: *mut c_void,
2306    pub glVertexAttribPointer: *mut c_void,
2307    pub glVertexP2ui: *mut c_void,
2308    pub glVertexP2uiv: *mut c_void,
2309    pub glVertexP3ui: *mut c_void,
2310    pub glVertexP3uiv: *mut c_void,
2311    pub glVertexP4ui: *mut c_void,
2312    pub glVertexP4uiv: *mut c_void,
2313    pub glVertexPointer: *mut c_void,
2314    pub glViewport: *mut c_void,
2315    pub glWaitSync: *mut c_void,
2316    pub glWindowPos2d: *mut c_void,
2317    pub glWindowPos2dv: *mut c_void,
2318    pub glWindowPos2f: *mut c_void,
2319    pub glWindowPos2fv: *mut c_void,
2320    pub glWindowPos2i: *mut c_void,
2321    pub glWindowPos2iv: *mut c_void,
2322    pub glWindowPos2s: *mut c_void,
2323    pub glWindowPos2sv: *mut c_void,
2324    pub glWindowPos3d: *mut c_void,
2325    pub glWindowPos3dv: *mut c_void,
2326    pub glWindowPos3f: *mut c_void,
2327    pub glWindowPos3fv: *mut c_void,
2328    pub glWindowPos3i: *mut c_void,
2329    pub glWindowPos3iv: *mut c_void,
2330    pub glWindowPos3s: *mut c_void,
2331    pub glWindowPos3sv: *mut c_void,
2332}
2333
2334fn encode_ascii(input: &str) -> Vec<i8> {
2335    input
2336    .chars()
2337    .filter(|c| c.is_ascii())
2338    .map(|c| c as i8)
2339    .chain(Some(0).into_iter())
2340    .collect::<Vec<_>>()
2341}
2342
2343pub unsafe fn cstr_from_ptr<'a>(ptr: *const c_char) -> &'a str {
2344
2345    #[inline]
2346    unsafe fn strlen(mut s: *const c_char) -> usize {
2347        let mut result = 0;
2348        while *s != 0 {
2349            s = s.offset(1);
2350            result += 1;
2351        }
2352        result
2353    }
2354
2355    let len = strlen(ptr);
2356    let ptr = ptr as *const u8; // c_char is always one byte, safe cast
2357    core::str::from_utf8_unchecked(core::slice::from_raw_parts(ptr, len as usize + 1))
2358}
2359
2360macro_rules! impl_gl_context {
2361    ($($opt:ident)?) => {
2362        $( $opt )? fn get_type(&self) -> GlType { GlType::Gl }
2363
2364        $( $opt )? fn buffer_data_untyped(
2365            &self,
2366            target: GLenum,
2367            size: GLsizeiptr,
2368            data: *const GLvoid,
2369            usage: GLenum,
2370        ) {
2371
2372            #[cfg(feature = "debug")] { _gl_print_debug("glBufferData"); }
2373            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2374
2375            if self.glBufferData == ptr::null_mut() {
2376                _gl_impl_panic("glBufferData");
2377                return;
2378            }
2379
2380            unsafe {
2381                let func: extern "system" fn(GLenum, GLsizeiptr, *const GLvoid, GLenum) = mem::transmute(self.glBufferData);
2382                (func)(target, size, data, usage)
2383            }
2384        }
2385
2386        $( $opt )? fn buffer_sub_data_untyped(
2387            &self,
2388            target: GLenum,
2389            offset: isize,
2390            size: GLsizeiptr,
2391            data: *const GLvoid,
2392        ) {
2393
2394            #[cfg(feature = "debug")] { _gl_print_debug("glBufferSubData"); }
2395            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2396
2397            if self.glBufferSubData == ptr::null_mut() {
2398                _gl_impl_panic("glBufferSubData");
2399                return;
2400            }
2401
2402            unsafe {
2403                let func: extern "system" fn(GLenum, isize, GLsizeiptr, *const GLvoid) = mem::transmute(self.glBufferSubData);
2404                (func)(target, offset, size, data)
2405            }
2406        }
2407
2408        $( $opt )? fn map_buffer(&self, target: GLenum, access: GLbitfield) -> *mut GLvoid {
2409
2410            #[cfg(feature = "debug")] { _gl_print_debug("glMapBuffer"); }
2411            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2412
2413            if self.glMapBuffer == ptr::null_mut() {
2414                _gl_impl_panic("glMapBuffer");
2415                return ptr::null_mut();
2416            }
2417
2418            unsafe {
2419                let func: extern "system" fn(GLenum, GLbitfield) -> *mut GLvoid = mem::transmute(self.glMapBuffer);
2420                (func)(target, access)
2421            }
2422        }
2423
2424        $( $opt )? fn map_buffer_range(
2425            &self,
2426            target: GLenum,
2427            offset: GLintptr,
2428            length: GLsizeiptr,
2429            access: GLbitfield,
2430        ) -> *mut GLvoid {
2431
2432            #[cfg(feature = "debug")] { _gl_print_debug("glMapBufferRange"); }
2433            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2434
2435            if self.glMapBufferRange == ptr::null_mut() {
2436                _gl_impl_panic("glMapBufferRange");
2437                return ptr::null_mut();
2438            }
2439
2440            unsafe {
2441                let func: extern "system" fn( GLenum, GLintptr, GLsizeiptr, GLbitfield) -> *mut GLvoid = mem::transmute(self.glMapBufferRange);
2442                (func)(target, offset, length, access)
2443            }
2444        }
2445
2446        $( $opt )? fn unmap_buffer(&self, target: GLenum) -> GLboolean {
2447
2448            #[cfg(feature = "debug")] { _gl_print_debug("glUnmapBuffer"); }
2449            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2450
2451            if self.glUnmapBuffer == ptr::null_mut() {
2452                _gl_impl_panic("glUnmapBuffer");
2453                return 1;
2454            }
2455            unsafe {
2456                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glUnmapBuffer);
2457                (func)(target)
2458            }
2459        }
2460
2461        $( $opt )? fn tex_buffer(&self, target: GLenum, internal_format: GLenum, buffer: GLuint) {
2462
2463            #[cfg(feature = "debug")] { _gl_print_debug("glTexBuffer"); }
2464            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2465
2466            if self.glTexBuffer == ptr::null_mut() {
2467                _gl_impl_panic("glTexBuffer");
2468                return;
2469            }
2470            unsafe {
2471                let func: extern "system" fn(GLenum, GLenum, GLuint) = mem::transmute(self.glTexBuffer);
2472                (func)(target, internal_format, buffer)
2473            }
2474        }
2475
2476        $( $opt )? fn shader_source(&self, shader: GLuint, strings: &[&[u8]]) {
2477
2478            #[cfg(feature = "debug")] { _gl_print_debug("glShaderSource"); }
2479            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2480
2481            let pointers: Vec<*const u8> = strings.iter().map(|string| (*string).as_ptr()).collect();
2482            let lengths: Vec<GLint> = strings.iter().map(|string| string.len() as GLint).collect();
2483
2484            if self.glShaderSource == ptr::null_mut() {
2485                _gl_impl_panic("glShaderSource");
2486                return;
2487            }
2488
2489            unsafe {
2490                let func: extern "system" fn(GLuint, GLsizei, *const *const GLchar, *const GLint) = mem::transmute(self.glShaderSource);
2491                (func)(shader, pointers.len() as GLsizei, pointers.as_ptr() as *const *const GLchar, lengths.as_ptr())
2492            }
2493
2494            mem::drop(lengths);
2495            mem::drop(pointers);
2496        }
2497
2498        $( $opt )? fn read_buffer(&self, mode: GLenum) {
2499
2500            #[cfg(feature = "debug")] { _gl_print_debug("glReadBuffer"); }
2501            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2502
2503            if self.glReadBuffer == ptr::null_mut() {
2504                _gl_impl_panic("glReadBuffer");
2505                return;
2506            }
2507            unsafe {
2508                let func: extern "system" fn(GLenum) = mem::transmute(self.glReadBuffer);
2509                (func)(mode)
2510            }
2511        }
2512
2513        $( $opt )? fn read_pixels_into_buffer(
2514            &self,
2515            x: GLint,
2516            y: GLint,
2517            width: GLsizei,
2518            height: GLsizei,
2519            format: GLenum,
2520            pixel_type: GLenum,
2521            dst_buffer: &mut [u8],
2522        ) {
2523
2524            #[cfg(feature = "debug")] { _gl_print_debug("glReadPixels"); }
2525            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2526
2527            if self.glReadPixels == ptr::null_mut() {
2528                _gl_impl_panic("glReadPixels");
2529                return;
2530            }
2531
2532
2533            #[cfg(feature = "debug")] { _gl_print_debug("glPixelStorei"); }
2534            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2535
2536            if self.glPixelStorei == ptr::null_mut() {
2537                _gl_impl_panic("glPixelStorei");
2538                return;
2539            }
2540
2541            unsafe {
2542                let glPixelStorei: extern "system" fn(GLenum, GLint) = mem::transmute(self.glPixelStorei);
2543                (glPixelStorei)(gl::PACK_ALIGNMENT, 1);
2544
2545                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *mut u8) = mem::transmute(self.glReadPixels);
2546                (func)(x, y, width, height, format, pixel_type, dst_buffer.as_mut_ptr())
2547            }
2548        }
2549
2550        $( $opt )? fn read_pixels(
2551            &self,
2552            x: GLint,
2553            y: GLint,
2554            width: GLsizei,
2555            height: GLsizei,
2556            format: GLenum,
2557            pixel_type: GLenum,
2558        ) -> Vec<u8> {
2559
2560            use gl::*;
2561
2562            let bit_depth = match pixel_type {
2563
2564                UNSIGNED_BYTE |
2565                BYTE |
2566                UNSIGNED_BYTE_3_3_2 |
2567                UNSIGNED_BYTE_2_3_3_REV => 1,
2568
2569                UNSIGNED_SHORT |
2570                UNSIGNED_SHORT_5_6_5 |
2571                UNSIGNED_SHORT_5_6_5_REV |
2572                UNSIGNED_SHORT_4_4_4_4 |
2573                UNSIGNED_SHORT_4_4_4_4_REV |
2574                UNSIGNED_SHORT_5_5_5_1 |
2575                UNSIGNED_SHORT_1_5_5_5_REV |
2576                SHORT => 2,
2577
2578                UNSIGNED_INT |
2579                UNSIGNED_INT_8_8_8_8 |
2580                UNSIGNED_INT_8_8_8_8_REV |
2581                UNSIGNED_INT_10_10_10_2 |
2582                UNSIGNED_INT_2_10_10_10_REV |
2583                UNSIGNED_INT_24_8 |
2584                UNSIGNED_INT_10F_11F_11F_REV |
2585                UNSIGNED_INT_5_9_9_9_REV |
2586                INT => 4,
2587
2588                HALF_FLOAT => 2,
2589
2590                FLOAT |
2591                FLOAT_32_UNSIGNED_INT_24_8_REV => 4,
2592
2593                _ => 0,
2594            };
2595
2596            let mut v = vec![0;width as usize * height as usize * bit_depth];
2597            self.read_pixels_into_buffer(x, y, width, height, format, pixel_type, &mut v[..]);
2598            v
2599        }
2600
2601        $( $opt )? unsafe fn read_pixels_into_pbo(
2602            &self,
2603            x: GLint,
2604            y: GLint,
2605            width: GLsizei,
2606            height: GLsizei,
2607            format: GLenum,
2608            pixel_type: GLenum,
2609        ) {
2610
2611            #[cfg(feature = "debug")] { _gl_print_debug("glReadPixels"); }
2612            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2613
2614            if self.glReadPixels == ptr::null_mut() {
2615                _gl_impl_panic("glReadPixels");
2616                return;
2617            }
2618
2619            let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *mut u8) = mem::transmute(self.glReadPixels);
2620            (func)(x, y, width, height, format, pixel_type, ptr::null_mut())
2621        }
2622
2623        $( $opt )? fn sample_coverage(&self, value: GLclampf, invert: bool) {
2624
2625            #[cfg(feature = "debug")] { _gl_print_debug("glSampleCoverage"); }
2626            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2627
2628            if self.glSampleCoverage == ptr::null_mut() {
2629                _gl_impl_panic("glSampleCoverage");
2630                return;
2631            }
2632
2633            unsafe {
2634                let func: extern "system" fn(GLclampf, bool) = mem::transmute(self.glSampleCoverage);
2635                (func)(value, invert)
2636            }
2637        }
2638
2639        $( $opt )? fn polygon_offset(&self, factor: GLfloat, units: GLfloat) {
2640
2641            #[cfg(feature = "debug")] { _gl_print_debug("glPolygonOffset"); }
2642            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2643
2644            if self.glPolygonOffset == ptr::null_mut() {
2645                _gl_impl_panic("glPolygonOffset");
2646                return;
2647            }
2648
2649            unsafe {
2650                let func: extern "system" fn(GLfloat, GLfloat) = mem::transmute(self.glPolygonOffset);
2651                (func)(factor, units)
2652            }
2653        }
2654
2655        $( $opt )? fn pixel_store_i(&self, name: GLenum, param: GLint) {
2656
2657            #[cfg(feature = "debug")] { _gl_print_debug("glPixelStorei"); }
2658            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2659
2660            if self.glPixelStorei == ptr::null_mut() {
2661                _gl_impl_panic("glPixelStorei");
2662                return;
2663            }
2664
2665            unsafe {
2666                let func: extern "system" fn(GLenum, GLint) = mem::transmute(self.glPixelStorei);
2667                (func)(name, param)
2668            }
2669        }
2670
2671        $( $opt )? fn gen_buffers(&self, n: GLsizei) -> Vec<GLuint> {
2672
2673            #[cfg(feature = "debug")] { _gl_print_debug("glGenBuffers"); }
2674            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2675
2676            if self.glGenBuffers == ptr::null_mut() {
2677                _gl_impl_panic("glGenBuffers");
2678                return Vec::new();
2679            }
2680
2681            let mut v = vec![0;n.max(0) as usize];
2682            unsafe {
2683                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenBuffers);
2684                (func)(n, v.as_mut_ptr());
2685            }
2686            v
2687        }
2688
2689        $( $opt )? fn gen_renderbuffers(&self, n: GLsizei) -> Vec<GLuint> {
2690
2691            #[cfg(feature = "debug")] { _gl_print_debug("glGenRenderbuffers"); }
2692            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2693
2694            if self.glGenRenderbuffers == ptr::null_mut() {
2695                _gl_impl_panic("glGenRenderbuffers");
2696                return Vec::new();
2697            }
2698
2699            let mut v = vec![0;n.max(0) as usize];
2700            unsafe {
2701                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenRenderbuffers);
2702                (func)(n, v.as_mut_ptr());
2703            }
2704            v
2705        }
2706
2707        $( $opt )? fn gen_framebuffers(&self, n: GLsizei) -> Vec<GLuint> {
2708
2709            #[cfg(feature = "debug")] { _gl_print_debug("glGenFramebuffers"); }
2710            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2711
2712            if self.glGenFramebuffers == ptr::null_mut() {
2713                _gl_impl_panic("glGenFramebuffers");
2714                return Vec::new();
2715            }
2716
2717            let mut v = vec![0;n.max(0) as usize];
2718            unsafe {
2719                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenFramebuffers);
2720                (func)(n, v.as_mut_ptr());
2721            }
2722            v
2723        }
2724
2725        $( $opt )? fn gen_textures(&self, n: GLsizei) -> Vec<GLuint> {
2726
2727            #[cfg(feature = "debug")] { _gl_print_debug("glGenTextures"); }
2728            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2729
2730            if self.glGenTextures == ptr::null_mut() {
2731                _gl_impl_panic("glGenTextures");
2732                return Vec::new();
2733            }
2734
2735            let mut v = vec![0;n.max(0) as usize];
2736            unsafe {
2737                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenTextures);
2738                (func)(n, v.as_mut_ptr());
2739            }
2740            v
2741        }
2742
2743        $( $opt )? fn gen_vertex_arrays(&self, n: GLsizei) -> Vec<GLuint> {
2744
2745            #[cfg(feature = "debug")] { _gl_print_debug("glGenVertexArrays"); }
2746            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2747
2748            if self.glGenVertexArrays == ptr::null_mut() {
2749                _gl_impl_panic("glGenVertexArrays");
2750                return Vec::new();
2751            }
2752
2753            let mut v = vec![0;n.max(0) as usize];
2754            unsafe {
2755                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenVertexArrays);
2756                (func)(n, v.as_mut_ptr());
2757            }
2758            v
2759        }
2760
2761        $( $opt )? fn gen_vertex_arrays_apple(&self, n: GLsizei) -> Vec<GLuint> {
2762
2763            #[cfg(feature = "debug")] { _gl_print_debug("glGenVertexArraysAPPLE"); }
2764            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2765
2766            if self.glGenVertexArraysAPPLE == ptr::null_mut() {
2767                _gl_impl_panic("glGenVertexArraysAPPLE");
2768                return Vec::new();
2769            }
2770
2771            let mut v = vec![0;n.max(0) as usize];
2772            unsafe {
2773                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenVertexArraysAPPLE);
2774                (func)(n, v.as_mut_ptr());
2775            }
2776            v
2777        }
2778
2779        $( $opt )? fn gen_queries(&self, n: GLsizei) -> Vec<GLuint> {
2780
2781            #[cfg(feature = "debug")] { _gl_print_debug("glGenQueries"); }
2782            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2783
2784            if self.glGenQueries == ptr::null_mut() {
2785                _gl_impl_panic("glGenQueries");
2786                return Vec::new();
2787            }
2788
2789            let mut v = vec![0;n.max(0) as usize];
2790            unsafe {
2791                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenQueries);
2792                (func)(n, v.as_mut_ptr());
2793            }
2794            v
2795        }
2796
2797        $( $opt )? fn begin_query(&self, target: GLenum, id: GLuint) {
2798
2799            #[cfg(feature = "debug")] { _gl_print_debug("glBeginQuery"); }
2800            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2801
2802            if self.glBeginQuery == ptr::null_mut() {
2803                _gl_impl_panic("glBeginQuery");
2804                return;
2805            }
2806
2807            unsafe {
2808                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBeginQuery);
2809                (func)(target, id)
2810            }
2811        }
2812
2813        $( $opt )? fn end_query(&self, target: GLenum) {
2814
2815            #[cfg(feature = "debug")] { _gl_print_debug("glEndQuery"); }
2816            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2817
2818            if self.glEndQuery == ptr::null_mut() {
2819                _gl_impl_panic("glEndQuery");
2820                return;
2821            }
2822
2823            unsafe {
2824                let func: extern "system" fn(GLenum) = mem::transmute(self.glEndQuery);
2825                (func)(target)
2826            }
2827        }
2828
2829        $( $opt )? fn query_counter(&self, id: GLuint, target: GLenum) {
2830
2831            #[cfg(feature = "debug")] { _gl_print_debug("glQueryCounter"); }
2832            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2833
2834            if self.glQueryCounter == ptr::null_mut() {
2835                _gl_impl_panic("glQueryCounter");
2836                return;
2837            }
2838
2839            unsafe {
2840                let func: extern "system" fn(GLuint, GLenum) = mem::transmute(self.glQueryCounter);
2841                (func)(id, target)
2842            }
2843        }
2844
2845        $( $opt )? fn get_query_object_iv(&self, id: GLuint, pname: GLenum) -> i32 {
2846
2847            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectiv"); }
2848            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2849
2850            if self.glGetQueryObjectiv == ptr::null_mut() {
2851                _gl_impl_panic("glGetQueryObjectiv");
2852                return 0;
2853            }
2854
2855            unsafe {
2856                let func: extern "system" fn(GLuint, GLenum) -> i32 = mem::transmute(self.glGetQueryObjectiv);
2857                (func)(id, pname)
2858            }
2859        }
2860
2861        $( $opt )? fn get_query_object_uiv(&self, id: GLuint, pname: GLenum) -> u32 {
2862
2863            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectuiv"); }
2864            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2865
2866            if self.glGetQueryObjectuiv == ptr::null_mut() {
2867                _gl_impl_panic("glGetQueryObjectuiv");
2868                return 0;
2869            }
2870
2871            unsafe {
2872                let func: extern "system" fn(GLuint, GLenum) -> u32 = mem::transmute(self.glGetQueryObjectuiv);
2873                (func)(id, pname)
2874            }
2875        }
2876
2877        $( $opt )? fn get_query_object_i64v(&self, id: GLuint, pname: GLenum) -> i64 {
2878
2879            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjecti64v"); }
2880            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2881
2882            if self.glGetQueryObjecti64v == ptr::null_mut() {
2883                _gl_impl_panic("glGetQueryObjecti64v");
2884                return 0;
2885            }
2886
2887            unsafe {
2888                let func: extern "system" fn(GLuint, GLenum) -> i64 = mem::transmute(self.glGetQueryObjecti64v);
2889                (func)(id, pname)
2890            }
2891        }
2892
2893        $( $opt )? fn get_query_object_ui64v(&self, id: GLuint, pname: GLenum) -> u64 {
2894
2895            #[cfg(feature = "debug")] { _gl_print_debug("glGetQueryObjectui64v"); }
2896            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2897
2898            if self.glGetQueryObjectui64v == ptr::null_mut() {
2899                _gl_impl_panic("glGetQueryObjectui64v");
2900                return 0;
2901            }
2902
2903            unsafe {
2904                let func: extern "system" fn(GLuint, GLenum) -> u64 = mem::transmute(self.glGetQueryObjectui64v);
2905                (func)(id, pname)
2906            }
2907        }
2908
2909        $( $opt )? fn delete_queries(&self, queries: &[GLuint]) {
2910
2911            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteQueries"); }
2912            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2913
2914            if self.glDeleteQueries == ptr::null_mut() {
2915                _gl_impl_panic("glDeleteQueries");
2916                return;
2917            }
2918
2919            unsafe {
2920                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteQueries);
2921                (func)(queries.len() as GLsizei, queries.as_ptr())
2922            }
2923        }
2924
2925        $( $opt )? fn delete_vertex_arrays(&self, vertex_arrays: &[GLuint]) {
2926
2927            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteVertexArrays"); }
2928            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2929
2930            if self.glDeleteVertexArrays == ptr::null_mut() {
2931                _gl_impl_panic("glDeleteVertexArrays");
2932                return;
2933            }
2934
2935            unsafe {
2936                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteVertexArrays);
2937                (func)(vertex_arrays.len() as GLsizei, vertex_arrays.as_ptr())
2938            }
2939        }
2940
2941        $( $opt )? fn delete_vertex_arrays_apple(&self, vertex_arrays: &[GLuint]) {
2942
2943            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteVertexArraysAPPLE"); }
2944            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2945
2946            if self.glDeleteVertexArraysAPPLE == ptr::null_mut() {
2947                _gl_impl_panic("glDeleteVertexArraysAPPLE");
2948                return;
2949            }
2950
2951            unsafe {
2952                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteVertexArraysAPPLE);
2953                (func)(vertex_arrays.len() as GLsizei, vertex_arrays.as_ptr())
2954            }
2955        }
2956
2957        $( $opt )? fn delete_buffers(&self, buffers: &[GLuint]) {
2958
2959            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteBuffers"); }
2960            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2961
2962            if self.glDeleteBuffers == ptr::null_mut() {
2963                _gl_impl_panic("glDeleteBuffers");
2964                return;
2965            }
2966
2967            unsafe {
2968                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteBuffers);
2969                (func)(buffers.len() as GLsizei, buffers.as_ptr())
2970            }
2971        }
2972
2973        $( $opt )? fn delete_renderbuffers(&self, renderbuffers: &[GLuint]) {
2974
2975            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteRenderbuffers"); }
2976            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2977
2978            if self.glDeleteRenderbuffers == ptr::null_mut() {
2979                _gl_impl_panic("glDeleteRenderbuffers");
2980                return;
2981            }
2982
2983            unsafe {
2984                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteRenderbuffers);
2985                (func)(renderbuffers.len() as GLsizei, renderbuffers.as_ptr())
2986            }
2987        }
2988
2989        $( $opt )? fn delete_framebuffers(&self, framebuffers: &[GLuint]) {
2990
2991            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteFramebuffers"); }
2992            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
2993
2994            if self.glDeleteFramebuffers == ptr::null_mut() {
2995                _gl_impl_panic("glDeleteFramebuffers");
2996                return;
2997            }
2998
2999            unsafe {
3000                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteFramebuffers);
3001                (func)(framebuffers.len() as GLsizei, framebuffers.as_ptr())
3002            }
3003        }
3004
3005        $( $opt )? fn delete_textures(&self, textures: &[GLuint]) {
3006
3007            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteTextures"); }
3008            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3009
3010            if self.glDeleteTextures == ptr::null_mut() {
3011                _gl_impl_panic("glDeleteTextures");
3012                return;
3013            }
3014
3015            unsafe {
3016                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteTextures);
3017                (func)(textures.len() as GLsizei, textures.as_ptr())
3018            }
3019        }
3020
3021        $( $opt )? fn framebuffer_renderbuffer(
3022            &self,
3023            target: GLenum,
3024            attachment: GLenum,
3025            renderbuffertarget: GLenum,
3026            renderbuffer: GLuint,
3027        ) {
3028
3029            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferRenderbuffer"); }
3030            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3031
3032            if self.glFramebufferRenderbuffer == ptr::null_mut() {
3033                _gl_impl_panic("glFramebufferRenderbuffer");
3034                return;
3035            }
3036
3037            unsafe {
3038                let func: extern "system" fn(GLenum, GLenum, GLenum, GLuint) = mem::transmute(self.glFramebufferRenderbuffer);
3039                (func)( target, attachment, renderbuffertarget, renderbuffer)
3040            }
3041        }
3042
3043        $( $opt )? fn renderbuffer_storage(
3044            &self,
3045            target: GLenum,
3046            internalformat: GLenum,
3047            width: GLsizei,
3048            height: GLsizei,
3049        ) {
3050
3051            #[cfg(feature = "debug")] { _gl_print_debug("glRenderbufferStorage"); }
3052            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3053
3054            if self.glRenderbufferStorage == ptr::null_mut() {
3055                _gl_impl_panic("glRenderbufferStorage");
3056                return;
3057            }
3058
3059            unsafe {
3060                let func: extern "system" fn(GLenum, GLenum, GLsizei, GLsizei) = mem::transmute(self.glRenderbufferStorage);
3061                (func)(target, internalformat, width, height)
3062            }
3063        }
3064
3065        $( $opt )? fn depth_func(&self, func: GLenum) {
3066
3067            #[cfg(feature = "debug")] { _gl_print_debug("glDepthFunc"); }
3068            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3069
3070            if self.glDepthFunc == ptr::null_mut() {
3071                _gl_impl_panic("glDepthFunc");
3072                return;
3073            }
3074
3075            unsafe {
3076                let glDepthFunc: extern "system" fn(GLenum) = mem::transmute(self.glDepthFunc);
3077                (glDepthFunc)(func)
3078            }
3079        }
3080
3081        $( $opt )? fn active_texture(&self, texture: GLenum) {
3082
3083            #[cfg(feature = "debug")] { _gl_print_debug("glActiveTexture"); }
3084            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3085
3086            if self.glActiveTexture == ptr::null_mut() {
3087                _gl_impl_panic("glActiveTexture");
3088                return;
3089            }
3090
3091            unsafe {
3092                let func: extern "system" fn(GLenum) = mem::transmute(self.glActiveTexture);
3093                (func)(texture)
3094            }
3095        }
3096
3097        $( $opt )? fn attach_shader(&self, program: GLuint, shader: GLuint) {
3098
3099            #[cfg(feature = "debug")] { _gl_print_debug("glAttachShader"); }
3100            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3101
3102            if self.glAttachShader == ptr::null_mut() {
3103                _gl_impl_panic("glAttachShader");
3104                return;
3105            }
3106
3107            unsafe {
3108                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glAttachShader);
3109                (func)(program, shader)
3110            }
3111        }
3112
3113        $( $opt )? fn bind_attrib_location(&self, program: GLuint, index: GLuint, name: &str) {
3114
3115
3116            #[cfg(feature = "debug")] { _gl_print_debug("glBindAttribLocation"); }
3117            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3118
3119            if self.glBindAttribLocation == ptr::null_mut() {
3120                _gl_impl_panic("glBindAttribLocation");
3121                return;
3122            }
3123
3124            let cstr = encode_ascii(name);
3125
3126            unsafe {
3127                let func: extern "system" fn(GLuint, GLuint, *const c_char) = mem::transmute(self.glBindAttribLocation);
3128                (func)(program, index, cstr.as_ptr())
3129            }
3130        }
3131
3132        $( $opt )? unsafe fn get_uniform_iv(&self, program: GLuint, location: GLint, result: &mut [GLint]) {
3133
3134            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformiv"); }
3135            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3136
3137            if self.glGetUniformiv == ptr::null_mut() {
3138                _gl_impl_panic("glGetUniformiv");
3139                return;
3140            }
3141
3142            let func: extern "system" fn(GLuint, GLint, *mut GLint) = mem::transmute(self.glGetUniformiv);
3143            (func)(program, location, result.as_mut_ptr())
3144        }
3145
3146        $( $opt )? unsafe fn get_uniform_fv(&self, program: GLuint, location: GLint, result: &mut [GLfloat]) {
3147
3148            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformfv"); }
3149            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3150
3151            if self.glGetUniformfv == ptr::null_mut() {
3152                _gl_impl_panic("glGetUniformfv");
3153                return;
3154            }
3155
3156            let func: extern "system" fn(GLuint, GLint, *mut GLfloat) = mem::transmute(self.glGetUniformfv);
3157            (func)(program, location, result.as_mut_ptr())
3158        }
3159
3160        $( $opt )? fn get_uniform_block_index(&self, program: GLuint, name: &str) -> GLuint {
3161
3162            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformBlockIndex"); }
3163            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3164
3165            if self.glGetUniformBlockIndex == ptr::null_mut() {
3166                _gl_impl_panic("glGetUniformBlockIndex");
3167                return 0;
3168            }
3169
3170            let cstr = encode_ascii(name);
3171
3172            unsafe {
3173                let func: extern "system" fn(GLuint, *const c_char) -> GLuint = mem::transmute(self.glGetUniformBlockIndex);
3174                (func)(program, cstr.as_ptr())
3175            }
3176        }
3177
3178        // ---------------------------------------------------------------------------------------------------------------------------
3179        // ---------------------------------------------------------------------------------------------------------------------------
3180        // ---------------------------------------------------------------------------------------------------------------------------
3181        // ---------------------------------------------------------------------------------------------------------------------------
3182
3183        $( $opt )? fn get_uniform_indices(&self, program: GLuint, names: &[&str]) -> Vec<GLuint> {
3184
3185
3186            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformIndices"); }
3187            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3188
3189            if self.glGetUniformIndices == ptr::null_mut() {
3190                _gl_impl_panic("glGetUniformIndices");
3191                return Vec::new();
3192            }
3193
3194            let c_strings: Vec<Vec<i8>> = names.iter().map(|n| encode_ascii(*n)).collect();
3195            let pointers: Vec<*const GLchar> = c_strings.iter().map(|string| string.as_ptr()).collect();
3196            let mut result = vec![0;c_strings.len()];
3197            unsafe {
3198                let func: extern "system" fn(GLuint, GLsizei, *const *const GLchar, *const GLuint) -> GLuint = mem::transmute(self.glGetUniformIndices);
3199                (func)(
3200                    program,
3201                    pointers.len() as GLsizei,
3202                    pointers.as_ptr(),
3203                    result.as_mut_ptr(),
3204                );
3205            }
3206            result
3207        }
3208
3209        $( $opt )? fn bind_buffer_base(&self, target: GLenum, index: GLuint, buffer: GLuint) {
3210
3211
3212            #[cfg(feature = "debug")] { _gl_print_debug("glBindBufferBase"); }
3213            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3214
3215            if self.glBindBufferBase == ptr::null_mut() {
3216                _gl_impl_panic("glBindBufferBase");
3217                return;
3218            }
3219
3220            unsafe {
3221                let func: extern "system" fn(GLenum, GLuint, GLuint) = mem::transmute(self.glBindBufferBase);
3222                (func)(target, index, buffer);
3223            }
3224        }
3225
3226        $( $opt )? fn bind_buffer_range(
3227            &self,
3228            target: GLenum,
3229            index: GLuint,
3230            buffer: GLuint,
3231            offset: GLintptr,
3232            size: GLsizeiptr,
3233        ) {
3234
3235
3236            #[cfg(feature = "debug")] { _gl_print_debug("glBindBufferRange"); }
3237            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3238
3239            if self.glBindBufferRange == ptr::null_mut() {
3240                _gl_impl_panic("glBindBufferRange");
3241                return;
3242            }
3243
3244            unsafe {
3245                let func: extern "system" fn(GLenum, GLuint, GLuint, GLintptr, GLsizeiptr) = mem::transmute(self.glBindBufferRange);
3246                (func)(target, index, buffer, offset, size);
3247            }
3248        }
3249
3250        $( $opt )? fn uniform_block_binding(
3251            &self,
3252            program: GLuint,
3253            uniform_block_index: GLuint,
3254            uniform_block_binding: GLuint,
3255        ) {
3256
3257
3258            #[cfg(feature = "debug")] { _gl_print_debug("glUniformBlockBinding"); }
3259            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3260
3261            if self.glUniformBlockBinding == ptr::null_mut() {
3262                _gl_impl_panic("glUniformBlockBinding");
3263                return;
3264            }
3265
3266            unsafe {
3267                let func: extern "system" fn(GLuint, GLuint, GLuint) = mem::transmute(self.glUniformBlockBinding);
3268                (func)(program, uniform_block_index, uniform_block_binding);
3269            }
3270        }
3271
3272        $( $opt )? fn bind_buffer(&self, target: GLenum, buffer: GLuint) {
3273
3274
3275            #[cfg(feature = "debug")] { _gl_print_debug("glBindBuffer"); }
3276            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3277
3278            if self.glBindBuffer == ptr::null_mut() {
3279                _gl_impl_panic("glBindBuffer");
3280                return;
3281            }
3282
3283            unsafe {
3284                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindBuffer);
3285                (func)(target, buffer);
3286            }
3287        }
3288
3289        $( $opt )? fn bind_vertex_array(&self, vao: GLuint) {
3290
3291
3292            #[cfg(feature = "debug")] { _gl_print_debug("glBindVertexArray"); }
3293            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3294
3295            if self.glBindVertexArray == ptr::null_mut() {
3296                _gl_impl_panic("glBindVertexArray");
3297                return;
3298            }
3299
3300            unsafe {
3301                let func: extern "system" fn(GLuint) = mem::transmute(self.glBindVertexArray);
3302                (func)(vao);
3303            }
3304        }
3305
3306        $( $opt )? fn bind_vertex_array_apple(&self, vao: GLuint) {
3307
3308
3309            #[cfg(feature = "debug")] { _gl_print_debug("glBindVertexArrayAPPLE"); }
3310            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3311
3312            if self.glBindVertexArrayAPPLE == ptr::null_mut() {
3313                _gl_impl_panic("glBindVertexArrayAPPLE");
3314                return;
3315            }
3316
3317            unsafe {
3318                let func: extern "system" fn(GLuint) = mem::transmute(self.glBindVertexArrayAPPLE);
3319                (func)(vao)
3320            }
3321        }
3322
3323        $( $opt )? fn bind_renderbuffer(&self, target: GLenum, renderbuffer: GLuint) {
3324
3325
3326            #[cfg(feature = "debug")] { _gl_print_debug("glBindRenderbuffer"); }
3327            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3328
3329            if self.glBindRenderbuffer == ptr::null_mut() {
3330                _gl_impl_panic("glBindRenderbuffer");
3331                return;
3332            }
3333
3334            unsafe {
3335                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindRenderbuffer);
3336                (func)(target, renderbuffer);
3337            }
3338        }
3339
3340        $( $opt )? fn bind_framebuffer(&self, target: GLenum, framebuffer: GLuint) {
3341
3342
3343            #[cfg(feature = "debug")] { _gl_print_debug("glBindFramebuffer"); }
3344            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3345
3346            if self.glBindFramebuffer == ptr::null_mut() {
3347                _gl_impl_panic("glBindFramebuffer");
3348                return;
3349            }
3350
3351            unsafe {
3352                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindFramebuffer);
3353                (func)(target, framebuffer);
3354            }
3355        }
3356
3357        $( $opt )? fn bind_texture(&self, target: GLenum, texture: GLuint) {
3358
3359
3360            #[cfg(feature = "debug")] { _gl_print_debug("glBindTexture"); }
3361            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3362
3363            if self.glBindTexture == ptr::null_mut() {
3364                _gl_impl_panic("glBindTexture");
3365                return;
3366            }
3367
3368            unsafe {
3369                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glBindTexture);
3370                (func)(target, texture);
3371            }
3372        }
3373
3374        $( $opt )? fn draw_buffers(&self, bufs: &[GLenum]) {
3375
3376
3377            #[cfg(feature = "debug")] { _gl_print_debug("glDrawBuffers"); }
3378            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3379
3380            if self.glDrawBuffers == ptr::null_mut() {
3381                _gl_impl_panic("glDrawBuffers");
3382                return;
3383            }
3384
3385            unsafe {
3386                let func: extern "system" fn(GLsizei, *const GLenum) = mem::transmute(self.glDrawBuffers);
3387                (func)(bufs.len() as GLsizei, bufs.as_ptr());
3388            }
3389        }
3390
3391        // FIXME: Does not verify buffer size -- unsafe!
3392        $( $opt )? fn tex_image_2d(
3393            &self,
3394            target: GLenum,
3395            level: GLint,
3396            internal_format: GLint,
3397            width: GLsizei,
3398            height: GLsizei,
3399            border: GLint,
3400            format: GLenum,
3401            ty: GLenum,
3402            opt_data: Option<&[u8]>,
3403        ) {
3404
3405            #[cfg(feature = "debug")] { _gl_print_debug("glTexImage2D"); }
3406            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3407
3408            if self.glTexImage2D == ptr::null_mut() {
3409                _gl_impl_panic("glTexImage2D");
3410                return;
3411            }
3412
3413            unsafe {
3414                let func: extern "system" fn(GLenum, GLint, GLint, GLsizei, GLsizei, GLint, GLenum, GLenum, *const GLvoid) = mem::transmute(self.glTexImage2D);
3415
3416                match opt_data {
3417                    Some(data) => {
3418                        (func)(
3419                            target,
3420                            level,
3421                            internal_format,
3422                            width,
3423                            height,
3424                            border,
3425                            format,
3426                            ty,
3427                            data.as_ptr() as *const GLvoid,
3428                        );
3429                    },
3430                    None => {
3431                        (func)(
3432                            target,
3433                            level,
3434                            internal_format,
3435                            width,
3436                            height,
3437                            border,
3438                            format,
3439                            ty,
3440                            ptr::null(),
3441                        );
3442                    },
3443                }
3444            }
3445        }
3446
3447        $( $opt )? fn compressed_tex_image_2d(
3448            &self,
3449            target: GLenum,
3450            level: GLint,
3451            internal_format: GLenum,
3452            width: GLsizei,
3453            height: GLsizei,
3454            border: GLint,
3455            data: &[u8],
3456        ) {
3457
3458
3459            #[cfg(feature = "debug")] { _gl_print_debug("glCompressedTexImage2D"); }
3460            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3461
3462            if self.glCompressedTexImage2D == ptr::null_mut() {
3463                _gl_impl_panic("glCompressedTexImage2D");
3464                return;
3465            }
3466
3467            unsafe {
3468                let func: extern "system" fn(GLenum, GLint, GLenum, GLsizei, GLsizei, GLint, GLsizei, *const GLvoid) = mem::transmute(self.glCompressedTexImage2D);
3469                (func)(
3470                    target,
3471                    level,
3472                    internal_format,
3473                    width,
3474                    height,
3475                    border,
3476                    data.len() as GLsizei,
3477                    data.as_ptr() as *const GLvoid,
3478                );
3479            }
3480        }
3481
3482        $( $opt )? fn compressed_tex_sub_image_2d(
3483            &self,
3484            target: GLenum,
3485            level: GLint,
3486            xoffset: GLint,
3487            yoffset: GLint,
3488            width: GLsizei,
3489            height: GLsizei,
3490            format: GLenum,
3491            data: &[u8],
3492        ) {
3493
3494            #[cfg(feature = "debug")] { _gl_print_debug("glCompressedTexSubImage2D"); }
3495            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3496
3497            if self.glCompressedTexSubImage2D == ptr::null_mut() {
3498                _gl_impl_panic("glCompressedTexSubImage2D");
3499                return;
3500            }
3501
3502            unsafe {
3503                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLsizei, *const GLvoid) = mem::transmute(self.glCompressedTexSubImage2D);
3504                (func)(
3505                    target,
3506                    level,
3507                    xoffset,
3508                    yoffset,
3509                    width,
3510                    height,
3511                    format,
3512                    data.len() as GLsizei,
3513                    data.as_ptr() as *const GLvoid,
3514                );
3515            }
3516        }
3517
3518        // FIXME: Does not verify buffer size -- unsafe!
3519        $( $opt )? fn tex_image_3d(
3520            &self,
3521            target: GLenum,
3522            level: GLint,
3523            internal_format: GLint,
3524            width: GLsizei,
3525            height: GLsizei,
3526            depth: GLsizei,
3527            border: GLint,
3528            format: GLenum,
3529            ty: GLenum,
3530            opt_data: Option<&[u8]>,
3531        ) {
3532
3533            #[cfg(feature = "debug")] { _gl_print_debug("glTexImage3D"); }
3534            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3535
3536            if self.glTexImage3D == ptr::null_mut() {
3537                _gl_impl_panic("glTexImage3D");
3538                return;
3539            }
3540
3541            unsafe {
3542                let pdata = match opt_data {
3543                    Some(data) => mem::transmute(data.as_ptr()),
3544                    None => ptr::null(),
3545                };
3546                let func: extern "system" fn(GLenum, GLint, GLint, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, *const GLvoid) = mem::transmute(self.glTexImage3D);
3547                (func)(
3548                    target,
3549                    level,
3550                    internal_format,
3551                    width,
3552                    height,
3553                    depth,
3554                    border,
3555                    format,
3556                    ty,
3557                    pdata,
3558                );
3559            }
3560        }
3561
3562        $( $opt )? fn copy_tex_image_2d(
3563            &self,
3564            target: GLenum,
3565            level: GLint,
3566            internal_format: GLenum,
3567            x: GLint,
3568            y: GLint,
3569            width: GLsizei,
3570            height: GLsizei,
3571            border: GLint,
3572        ) {
3573
3574            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexImage2D"); }
3575            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3576
3577            if self.glCopyTexImage2D == ptr::null_mut() {
3578                _gl_impl_panic("glCopyTexImage2D");
3579                return;
3580            }
3581
3582            unsafe {
3583                let func: extern "system" fn(GLenum,GLint,GLenum,GLint,GLint,GLsizei,GLsizei,GLint) = mem::transmute(self.glCopyTexImage2D);
3584                (func)(
3585                    target,
3586                    level,
3587                    internal_format,
3588                    x,
3589                    y,
3590                    width,
3591                    height,
3592                    border,
3593                );
3594            }
3595        }
3596
3597        $( $opt )? fn copy_tex_sub_image_2d(
3598            &self,
3599            target: GLenum,
3600            level: GLint,
3601            xoffset: GLint,
3602            yoffset: GLint,
3603            x: GLint,
3604            y: GLint,
3605            width: GLsizei,
3606            height: GLsizei,
3607        ) {
3608
3609            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexSubImage2D"); }
3610            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3611
3612            if self.glCopyTexSubImage2D == ptr::null_mut() {
3613                _gl_impl_panic("glCopyTexSubImage2D");
3614                return;
3615            }
3616
3617            unsafe {
3618                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glCopyTexSubImage2D);
3619                (func)(target, level, xoffset, yoffset, x, y, width, height);
3620            }
3621        }
3622
3623        $( $opt )? fn copy_tex_sub_image_3d(
3624            &self,
3625            target: GLenum,
3626            level: GLint,
3627            xoffset: GLint,
3628            yoffset: GLint,
3629            zoffset: GLint,
3630            x: GLint,
3631            y: GLint,
3632            width: GLsizei,
3633            height: GLsizei,
3634        ) {
3635
3636            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTexSubImage3D"); }
3637            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3638
3639            if self.glCopyTexSubImage3D == ptr::null_mut() {
3640                _gl_impl_panic("glCopyTexSubImage3D");
3641                return;
3642            }
3643
3644            unsafe {
3645                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glCopyTexSubImage3D);
3646                (func)(
3647                    target, level, xoffset, yoffset, zoffset, x, y, width, height,
3648                );
3649            }
3650        }
3651
3652        $( $opt )? fn tex_sub_image_2d(
3653            &self,
3654            target: GLenum,
3655            level: GLint,
3656            xoffset: GLint,
3657            yoffset: GLint,
3658            width: GLsizei,
3659            height: GLsizei,
3660            format: GLenum,
3661            ty: GLenum,
3662            data: &[u8],
3663        ) {
3664
3665            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage2D"); }
3666            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3667
3668            if self.glTexSubImage2D == ptr::null_mut() {
3669                _gl_impl_panic("glTexSubImage2D");
3670                return;
3671            }
3672
3673            unsafe {
3674                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage2D);
3675                (func)(
3676                    target,
3677                    level,
3678                    xoffset,
3679                    yoffset,
3680                    width,
3681                    height,
3682                    format,
3683                    ty,
3684                    data.as_ptr() as *const c_void,
3685                );
3686            }
3687        }
3688
3689        $( $opt )? fn tex_sub_image_2d_pbo(
3690            &self,
3691            target: GLenum,
3692            level: GLint,
3693            xoffset: GLint,
3694            yoffset: GLint,
3695            width: GLsizei,
3696            height: GLsizei,
3697            format: GLenum,
3698            ty: GLenum,
3699            offset: usize,
3700        ) {
3701
3702            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage2D"); }
3703            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3704
3705            if self.glTexSubImage2D == ptr::null_mut() {
3706                _gl_impl_panic("glTexSubImage2D");
3707                return;
3708            }
3709
3710            unsafe {
3711                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage2D);
3712                (func)(
3713                    target,
3714                    level,
3715                    xoffset,
3716                    yoffset,
3717                    width,
3718                    height,
3719                    format,
3720                    ty,
3721                    offset as *const c_void,
3722                );
3723            }
3724        }
3725
3726        $( $opt )? fn tex_sub_image_3d(
3727            &self,
3728            target: GLenum,
3729            level: GLint,
3730            xoffset: GLint,
3731            yoffset: GLint,
3732            zoffset: GLint,
3733            width: GLsizei,
3734            height: GLsizei,
3735            depth: GLsizei,
3736            format: GLenum,
3737            ty: GLenum,
3738            data: &[u8],
3739        ) {
3740
3741            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage3D"); }
3742            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3743
3744            if self.glTexSubImage3D == ptr::null_mut() {
3745                _gl_impl_panic("glTexSubImage3D");
3746                return;
3747            }
3748
3749            unsafe {
3750                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage3D);
3751                (func)(
3752                    target,
3753                    level,
3754                    xoffset,
3755                    yoffset,
3756                    zoffset,
3757                    width,
3758                    height,
3759                    depth,
3760                    format,
3761                    ty,
3762                    data.as_ptr() as *const c_void,
3763                );
3764            }
3765        }
3766
3767        $( $opt )? fn tex_sub_image_3d_pbo(
3768            &self,
3769            target: GLenum,
3770            level: GLint,
3771            xoffset: GLint,
3772            yoffset: GLint,
3773            zoffset: GLint,
3774            width: GLsizei,
3775            height: GLsizei,
3776            depth: GLsizei,
3777            format: GLenum,
3778            ty: GLenum,
3779            offset: usize,
3780        ) {
3781
3782            #[cfg(feature = "debug")] { _gl_print_debug("glTexSubImage3D"); }
3783            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3784
3785            if self.glTexSubImage3D == ptr::null_mut() {
3786                _gl_impl_panic("glTexSubImage3D");
3787                return;
3788            }
3789
3790            unsafe {
3791                let func: extern "system" fn(GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei, GLenum, GLenum, *const c_void) = mem::transmute(self.glTexSubImage3D);
3792                (func)(
3793                    target,
3794                    level,
3795                    xoffset,
3796                    yoffset,
3797                    zoffset,
3798                    width,
3799                    height,
3800                    depth,
3801                    format,
3802                    ty,
3803                    offset as *const c_void,
3804                );
3805            }
3806        }
3807
3808        $( $opt )? fn tex_storage_2d(
3809            &self,
3810            target: GLenum,
3811            levels: GLint,
3812            internal_format: GLenum,
3813            width: GLsizei,
3814            height: GLsizei,
3815        ) {
3816
3817            #[cfg(feature = "debug")] { _gl_print_debug("glTexStorage2D"); }
3818            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3819
3820            if self.glTexStorage2D == ptr::null_mut() {
3821                _gl_impl_panic("glTexStorage2D");
3822                return;
3823            }
3824
3825            unsafe {
3826                let func: extern "system" fn(GLenum, GLsizei, GLenum, GLsizei, GLsizei) = mem::transmute(self.glTexStorage2D);
3827                (func)(target, levels, internal_format, width, height);
3828            }
3829        }
3830
3831        $( $opt )? fn tex_storage_3d(
3832            &self,
3833            target: GLenum,
3834            levels: GLint,
3835            internal_format: GLenum,
3836            width: GLsizei,
3837            height: GLsizei,
3838            depth: GLsizei,
3839        ) {
3840
3841            #[cfg(feature = "debug")] { _gl_print_debug("glTexStorage3D"); }
3842            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3843
3844            if self.glTexStorage3D == ptr::null_mut() {
3845                _gl_impl_panic("glTexStorage3D");
3846                return;
3847            }
3848
3849            unsafe {
3850                let func: extern "system" fn(GLenum, GLsizei, GLenum, GLsizei, GLsizei, GLsizei) = mem::transmute(self.glTexStorage3D);
3851                (func)(target, levels, internal_format, width, height, depth);
3852            }
3853        }
3854
3855        $( $opt )? fn get_tex_image_into_buffer(
3856            &self,
3857            target: GLenum,
3858            level: GLint,
3859            format: GLenum,
3860            ty: GLenum,
3861            output: &mut [u8],
3862        ) {
3863
3864            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexImage"); }
3865            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3866
3867            if self.glGetTexImage == ptr::null_mut() {
3868                _gl_impl_panic("glGetTexImage");
3869                return;
3870            }
3871
3872            unsafe {
3873                let func: extern "system" fn(GLenum, GLint, GLenum, GLenum, *mut GLvoid) = mem::transmute(self.glGetTexImage);
3874                (func)(target, level, format, ty, output.as_mut_ptr() as *mut _);
3875            }
3876        }
3877
3878        $( $opt )? unsafe fn copy_image_sub_data(
3879            &self,
3880            src_name: GLuint,
3881            src_target: GLenum,
3882            src_level: GLint,
3883            src_x: GLint,
3884            src_y: GLint,
3885            src_z: GLint,
3886            dst_name: GLuint,
3887            dst_target: GLenum,
3888            dst_level: GLint,
3889            dst_x: GLint,
3890            dst_y: GLint,
3891            dst_z: GLint,
3892            src_width: GLsizei,
3893            src_height: GLsizei,
3894            src_depth: GLsizei,
3895        ) {
3896
3897            #[cfg(feature = "debug")] { _gl_print_debug("glCopyImageSubData"); }
3898            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3899
3900            if self.glCopyImageSubData == ptr::null_mut() {
3901                _gl_impl_panic("glCopyImageSubData");
3902                return;
3903            }
3904
3905            let func: extern "system" fn(GLuint, GLenum, GLint, GLint, GLint, GLint, GLuint, GLenum, GLint, GLint, GLint, GLint, GLsizei, GLsizei, GLsizei) = mem::transmute(self.glCopyImageSubData);
3906            (func)(
3907                src_name, src_target, src_level, src_x, src_y, src_z, dst_name, dst_target, dst_level,
3908                dst_x, dst_y, dst_z, src_width, src_height, src_depth,
3909            );
3910        }
3911
3912        $( $opt )? fn invalidate_framebuffer(&self, target: GLenum, attachments: &[GLenum]) {
3913
3914
3915            #[cfg(feature = "debug")] { _gl_print_debug("glInvalidateFramebuffer"); }
3916            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3917
3918            if self.glInvalidateFramebuffer == ptr::null_mut() {
3919                _gl_impl_panic("glInvalidateFramebuffer");
3920                return;
3921            }
3922
3923            unsafe {
3924                let func: extern "system" fn(GLenum, GLsizei, *const GLenum) = mem::transmute(self.glInvalidateFramebuffer);
3925                (func)(
3926                    target,
3927                    attachments.len() as GLsizei,
3928                    attachments.as_ptr(),
3929                );
3930            }
3931        }
3932
3933        $( $opt )? fn invalidate_sub_framebuffer(
3934            &self,
3935            target: GLenum,
3936            attachments: &[GLenum],
3937            xoffset: GLint,
3938            yoffset: GLint,
3939            width: GLsizei,
3940            height: GLsizei,
3941        ) {
3942
3943
3944            #[cfg(feature = "debug")] { _gl_print_debug("glInvalidateSubFramebuffer"); }
3945            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3946
3947            if self.glInvalidateSubFramebuffer == ptr::null_mut() {
3948                _gl_impl_panic("glInvalidateSubFramebuffer");
3949                return;
3950            }
3951
3952            unsafe {
3953                let func: extern "system" fn(GLenum, GLsizei, *const GLenum, GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glInvalidateSubFramebuffer);
3954                (func)(
3955                    target,
3956                    attachments.len() as GLsizei,
3957                    attachments.as_ptr(),
3958                    xoffset,
3959                    yoffset,
3960                    width,
3961                    height,
3962                );
3963            }
3964        }
3965
3966        $( $opt )? unsafe fn get_integer_v(&self, name: GLenum, result: &mut [GLint]) {
3967
3968            #[cfg(feature = "debug")] { _gl_print_debug("glGetIntegerv"); }
3969            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3970
3971            if self.glGetIntegerv == ptr::null_mut() {
3972                _gl_impl_panic("glGetIntegerv");
3973                return;
3974            }
3975
3976            let func: extern "system" fn(GLenum, *mut GLint) = mem::transmute(self.glGetIntegerv);
3977            (func)(name, result.as_mut_ptr());
3978        }
3979
3980        $( $opt )? unsafe fn get_integer_64v(&self, name: GLenum, result: &mut [GLint64]) {
3981
3982            #[cfg(feature = "debug")] { _gl_print_debug("glGetInteger64v"); }
3983            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3984
3985            if self.glGetInteger64v == ptr::null_mut() {
3986                _gl_impl_panic("glGetInteger64v");
3987                return;
3988            }
3989            let func: extern "system" fn(GLenum, *mut GLint64) = mem::transmute(self.glGetInteger64v);
3990            (func)(name, result.as_mut_ptr());
3991        }
3992
3993        $( $opt )? unsafe fn get_integer_iv(&self, name: GLenum, index: GLuint, result: &mut [GLint]) {
3994
3995            #[cfg(feature = "debug")] { _gl_print_debug("glGetIntegeri_v"); }
3996            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
3997
3998            if self.glGetIntegeri_v == ptr::null_mut() {
3999                _gl_impl_panic("glGetIntegeri_v");
4000                return;
4001            }
4002            let func: extern "system" fn(GLenum, GLuint, *mut GLint) = mem::transmute(self.glGetIntegeri_v);
4003            (func)(name, index, result.as_mut_ptr());
4004        }
4005
4006        #[inline]
4007        $( $opt )? unsafe fn get_integer_64iv(&self, name: GLenum, index: GLuint, result: &mut [GLint64]) {
4008
4009            #[cfg(feature = "debug")] { _gl_print_debug("glGetInteger64i_v"); }
4010            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4011
4012            if self.glGetInteger64i_v == ptr::null_mut() {
4013                _gl_impl_panic("glGetInteger64i_v");
4014                return;
4015            }
4016            let func: extern "system" fn(GLenum, GLuint, *mut GLint64) = mem::transmute(self.glGetInteger64i_v);
4017            (func)(name, index, result.as_mut_ptr());
4018        }
4019
4020        #[inline]
4021        $( $opt )? unsafe fn get_boolean_v(&self, name: GLenum, result: &mut [GLboolean]) {
4022
4023            #[cfg(feature = "debug")] { _gl_print_debug("glGetBooleanv"); }
4024            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4025
4026            if self.glGetBooleanv == ptr::null_mut() {
4027                _gl_impl_panic("glGetBooleanv");
4028                return;
4029            }
4030            let func: extern "system" fn(GLenum, *mut GLboolean) = mem::transmute(self.glGetBooleanv);
4031            (func)(name, result.as_mut_ptr());
4032        }
4033
4034        #[inline]
4035        $( $opt )? unsafe fn get_float_v(&self, name: GLenum, result: &mut [GLfloat]) {
4036
4037            #[cfg(feature = "debug")] { _gl_print_debug("glGetFloatv"); }
4038            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4039
4040            if self.glGetFloatv == ptr::null_mut() {
4041                _gl_impl_panic("glGetFloatv");
4042                return;
4043            }
4044            let func: extern "system" fn(GLenum, *mut GLfloat) = mem::transmute(self.glGetFloatv);
4045            (func)(name, result.as_mut_ptr());
4046        }
4047
4048        $( $opt )? fn get_framebuffer_attachment_parameter_iv(
4049            &self,
4050            target: GLenum,
4051            attachment: GLenum,
4052            pname: GLenum,
4053        ) -> GLint {
4054
4055            #[cfg(feature = "debug")] { _gl_print_debug("glGetFramebufferAttachmentParameteriv"); }
4056            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4057
4058            if self.glGetFramebufferAttachmentParameteriv == ptr::null_mut() {
4059                _gl_impl_panic("glGetFramebufferAttachmentParameteriv");
4060                return 0;
4061            }
4062            let mut result: GLint = 0;
4063            unsafe {
4064                let func: extern "system" fn(GLenum, GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetFramebufferAttachmentParameteriv);
4065                (func)(
4066                    target,
4067                    attachment,
4068                    pname,
4069                    &mut result,
4070                );
4071            }
4072            result
4073        }
4074
4075        $( $opt )? fn get_renderbuffer_parameter_iv(&self, target: GLenum, pname: GLenum) -> GLint {
4076
4077            #[cfg(feature = "debug")] { _gl_print_debug("glGetRenderbufferParameteriv"); }
4078            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4079
4080            if self.glGetRenderbufferParameteriv == ptr::null_mut() {
4081                _gl_impl_panic("glGetRenderbufferParameteriv");
4082                return 0;
4083            }
4084
4085            let mut result: GLint = 0;
4086            unsafe {
4087                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetRenderbufferParameteriv);
4088                (func)(target, pname, &mut result);
4089            }
4090            result
4091        }
4092
4093        $( $opt )? fn get_tex_parameter_iv(&self, target: GLenum, pname: GLenum) -> GLint {
4094
4095
4096            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexParameteriv"); }
4097            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4098
4099            if self.glGetTexParameteriv == ptr::null_mut() {
4100                _gl_impl_panic("glGetTexParameteriv");
4101                return 0;
4102            }
4103
4104            let mut result: GLint = 0;
4105            unsafe {
4106                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetTexParameteriv);
4107                (func)(target, pname, &mut result);
4108            }
4109            result
4110        }
4111
4112        $( $opt )? fn get_tex_parameter_fv(&self, target: GLenum, pname: GLenum) -> GLfloat {
4113
4114
4115            #[cfg(feature = "debug")] { _gl_print_debug("glGetTexParameterfv"); }
4116            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4117
4118            if self.glGetTexParameterfv == ptr::null_mut() {
4119                _gl_impl_panic("glGetTexParameterfv");
4120                return 0.0;
4121            }
4122
4123            let mut result: GLfloat = 0.0;
4124            unsafe {
4125                let func: extern "system" fn(GLenum, GLenum, *mut GLfloat) = mem::transmute(self.glGetTexParameterfv);
4126                (func)(target, pname, &mut result);
4127            }
4128            result
4129        }
4130
4131        $( $opt )? fn tex_parameter_i(&self, target: GLenum, pname: GLenum, param: GLint) {
4132
4133
4134            #[cfg(feature = "debug")] { _gl_print_debug("glTexParameteri"); }
4135            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4136
4137            if self.glTexParameteri == ptr::null_mut() {
4138                _gl_impl_panic("glTexParameteri");
4139                return;
4140            }
4141
4142            unsafe {
4143                let func: extern "system" fn(GLenum, GLenum, GLint) = mem::transmute(self.glTexParameteri);
4144                (func)(target, pname, param);
4145            }
4146        }
4147
4148        $( $opt )? fn tex_parameter_f(&self, target: GLenum, pname: GLenum, param: GLfloat) {
4149
4150
4151            #[cfg(feature = "debug")] { _gl_print_debug("glTexParameterf"); }
4152            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4153
4154            if self.glTexParameterf == ptr::null_mut() {
4155                _gl_impl_panic("glTexParameterf");
4156                return;
4157            }
4158
4159            unsafe {
4160                let func: extern "system" fn(GLenum, GLenum, GLfloat) = mem::transmute(self.glTexParameterf);
4161                (func)(target, pname, param);
4162            }
4163        }
4164
4165        $( $opt )? fn framebuffer_texture_2d(
4166            &self,
4167            target: GLenum,
4168            attachment: GLenum,
4169            textarget: GLenum,
4170            texture: GLuint,
4171            level: GLint,
4172        ) {
4173
4174
4175            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferTexture2D"); }
4176            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4177
4178            if self.glFramebufferTexture2D == ptr::null_mut() {
4179                _gl_impl_panic("glFramebufferTexture2D");
4180                return;
4181            }
4182
4183            unsafe {
4184                let func: extern "system" fn(GLenum, GLenum, GLenum, GLuint, GLint) = mem::transmute(self.glFramebufferTexture2D);
4185                (func)(target, attachment, textarget, texture, level);
4186            }
4187        }
4188
4189        $( $opt )? fn framebuffer_texture_layer(
4190            &self,
4191            target: GLenum,
4192            attachment: GLenum,
4193            texture: GLuint,
4194            level: GLint,
4195            layer: GLint,
4196        ) {
4197
4198            #[cfg(feature = "debug")] { _gl_print_debug("glFramebufferTextureLayer"); }
4199            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4200
4201            if self.glFramebufferTextureLayer == ptr::null_mut() {
4202                _gl_impl_panic("glFramebufferTextureLayer");
4203                return;
4204            }
4205
4206            unsafe {
4207                let func: extern "system" fn(GLenum, GLenum, GLuint, GLint, GLint) = mem::transmute(self.glFramebufferTextureLayer);
4208                (func)(target, attachment, texture, level, layer);
4209            }
4210        }
4211
4212        $( $opt )? fn blit_framebuffer(
4213            &self,
4214            src_x0: GLint,
4215            src_y0: GLint,
4216            src_x1: GLint,
4217            src_y1: GLint,
4218            dst_x0: GLint,
4219            dst_y0: GLint,
4220            dst_x1: GLint,
4221            dst_y1: GLint,
4222            mask: GLbitfield,
4223            filter: GLenum,
4224        ) {
4225
4226            #[cfg(feature = "debug")] { _gl_print_debug("glBlitFramebuffer"); }
4227            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4228
4229            if self.glBlitFramebuffer == ptr::null_mut() {
4230                _gl_impl_panic("glBlitFramebuffer");
4231                return;
4232            }
4233
4234            unsafe {
4235                let func: extern "system" fn(GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLint, GLbitfield, GLenum) = mem::transmute(self.glBlitFramebuffer);
4236                (func)(
4237                    src_x0, src_y0, src_x1, src_y1, dst_x0, dst_y0, dst_x1, dst_y1, mask, filter,
4238                );
4239            }
4240        }
4241
4242        $( $opt )? fn vertex_attrib_4f(&self, index: GLuint, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat) {
4243
4244            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttrib4f"); }
4245            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4246
4247            if self.glVertexAttrib4f == ptr::null_mut() {
4248                _gl_impl_panic("glVertexAttrib4f");
4249                return;
4250            }
4251
4252            unsafe {
4253                let func: extern "system" fn(GLuint, GLfloat, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glVertexAttrib4f);
4254                (func)(index, x, y, z, w)
4255            }
4256        }
4257
4258        $( $opt )? fn vertex_attrib_pointer_f32(
4259            &self,
4260            index: GLuint,
4261            size: GLint,
4262            normalized: bool,
4263            stride: GLsizei,
4264            offset: GLuint,
4265        ) {
4266
4267            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribPointer"); }
4268            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4269
4270            if self.glVertexAttribPointer == ptr::null_mut() {
4271                _gl_impl_panic("glVertexAttribPointer");
4272                return;
4273            }
4274
4275            unsafe {
4276                let func: extern "system" fn(GLuint, GLint, GLenum, GLboolean, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribPointer);
4277                (func)(
4278                    index,
4279                    size,
4280                    gl::FLOAT,
4281                    normalized as GLboolean,
4282                    stride,
4283                    offset as *const GLvoid,
4284                )
4285            }
4286        }
4287
4288        $( $opt )? fn vertex_attrib_pointer(
4289            &self,
4290            index: GLuint,
4291            size: GLint,
4292            type_: GLenum,
4293            normalized: bool,
4294            stride: GLsizei,
4295            offset: GLuint,
4296        ) {
4297
4298            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribPointer"); }
4299            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4300
4301            if self.glVertexAttribPointer == ptr::null_mut() {
4302                _gl_impl_panic("glVertexAttribPointer");
4303                return;
4304            }
4305
4306            unsafe {
4307                let func: extern "system" fn(GLuint, GLint, GLenum, GLboolean, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribPointer);
4308                (func)(
4309                    index,
4310                    size,
4311                    type_,
4312                    normalized as GLboolean,
4313                    stride,
4314                    offset as *const GLvoid,
4315                )
4316            }
4317        }
4318
4319        $( $opt )? fn vertex_attrib_i_pointer(
4320            &self,
4321            index: GLuint,
4322            size: GLint,
4323            type_: GLenum,
4324            stride: GLsizei,
4325            offset: GLuint,
4326        ) {
4327
4328            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribIPointer"); }
4329            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4330
4331            if self.glVertexAttribIPointer == ptr::null_mut() {
4332                _gl_impl_panic("glVertexAttribIPointer");
4333                return;
4334            }
4335
4336            unsafe {
4337                let func: extern "system" fn(GLuint, GLint, GLenum, GLsizei, *const GLvoid) = mem::transmute(self.glVertexAttribIPointer);
4338                (func)(index, size, type_, stride, offset as *const GLvoid)
4339            }
4340        }
4341
4342        $( $opt )? fn vertex_attrib_divisor(&self, index: GLuint, divisor: GLuint) {
4343
4344
4345            #[cfg(feature = "debug")] { _gl_print_debug("glVertexAttribDivisor"); }
4346            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4347
4348            if self.glVertexAttribDivisor == ptr::null_mut() {
4349                _gl_impl_panic("glVertexAttribDivisor");
4350                return;
4351            }
4352
4353            unsafe {
4354                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glVertexAttribDivisor);
4355                (func)(index, divisor)
4356            }
4357        }
4358
4359        $( $opt )? fn viewport(&self, x: GLint, y: GLint, width: GLsizei, height: GLsizei) {
4360
4361
4362            #[cfg(feature = "debug")] { _gl_print_debug("glViewport"); }
4363            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4364
4365            if self.glViewport == ptr::null_mut() {
4366                _gl_impl_panic("glViewport");
4367                return;
4368            }
4369
4370            unsafe {
4371                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glViewport);
4372                (func)(x, y, width, height);
4373            }
4374        }
4375
4376        $( $opt )? fn scissor(&self, x: GLint, y: GLint, width: GLsizei, height: GLsizei) {
4377
4378
4379            #[cfg(feature = "debug")] { _gl_print_debug("glScissor"); }
4380            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4381
4382            if self.glScissor == ptr::null_mut() {
4383                _gl_impl_panic("glScissor");
4384                return;
4385            }
4386
4387            unsafe {
4388                let func: extern "system" fn(GLint, GLint, GLsizei, GLsizei) = mem::transmute(self.glScissor);
4389                (func)(x, y, width, height);
4390            }
4391        }
4392
4393        $( $opt )? fn line_width(&self, width: GLfloat) {
4394
4395
4396            #[cfg(feature = "debug")] { _gl_print_debug("glLineWidth"); }
4397            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4398
4399            if self.glLineWidth == ptr::null_mut() {
4400                _gl_impl_panic("glLineWidth");
4401                return;
4402            }
4403
4404            unsafe {
4405                let func: extern "system" fn(GLfloat) = mem::transmute(self.glLineWidth);
4406                (func)(width);
4407            }
4408        }
4409
4410        $( $opt )? fn use_program(&self, program: GLuint) {
4411
4412
4413            #[cfg(feature = "debug")] { _gl_print_debug("glUseProgram"); }
4414            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4415
4416            if self.glUseProgram == ptr::null_mut() {
4417                _gl_impl_panic("glUseProgram");
4418                return;
4419            }
4420
4421            unsafe {
4422                let func: extern "system" fn(GLuint) = mem::transmute(self.glUseProgram);
4423                (func)(program);
4424            }
4425        }
4426
4427        $( $opt )? fn validate_program(&self, program: GLuint) {
4428
4429
4430            #[cfg(feature = "debug")] { _gl_print_debug("glValidateProgram"); }
4431            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4432
4433            if self.glValidateProgram == ptr::null_mut() {
4434                _gl_impl_panic("glValidateProgram");
4435                return;
4436            }
4437
4438            unsafe {
4439                let func: extern "system" fn(GLuint) = mem::transmute(self.glValidateProgram);
4440                (func)(program);
4441            }
4442        }
4443
4444        $( $opt )? fn draw_arrays(&self, mode: GLenum, first: GLint, count: GLsizei) {
4445
4446
4447            #[cfg(feature = "debug")] { _gl_print_debug("glDrawArrays"); }
4448            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4449
4450            if self.glDrawArrays == ptr::null_mut() {
4451                _gl_impl_panic("glDrawArrays");
4452                return;
4453            }
4454
4455            unsafe {
4456                let func: extern "system" fn(GLenum, GLint, GLsizei) = mem::transmute(self.glDrawArrays);
4457                return (func)(mode, first, count);
4458            }
4459        }
4460
4461        $( $opt )? fn draw_arrays_instanced(
4462            &self,
4463            mode: GLenum,
4464            first: GLint,
4465            count: GLsizei,
4466            primcount: GLsizei,
4467        ) {
4468
4469
4470            #[cfg(feature = "debug")] { _gl_print_debug("glDrawArraysInstanced"); }
4471            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4472
4473            if self.glDrawArraysInstanced == ptr::null_mut() {
4474                _gl_impl_panic("glDrawArraysInstanced");
4475                return;
4476            }
4477
4478            unsafe {
4479                let func: extern "system" fn(GLenum,GLint,GLsizei,GLsizei) = mem::transmute(self.glDrawArraysInstanced);
4480                return (func)(mode, first, count, primcount);
4481            }
4482        }
4483
4484        $( $opt )? fn draw_elements(
4485            &self,
4486            mode: GLenum,
4487            count: GLsizei,
4488            element_type: GLenum,
4489            indices_offset: GLuint,
4490        ) {
4491
4492            #[cfg(feature = "debug")] { _gl_print_debug("glDrawElements"); }
4493            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4494
4495            if self.glDrawElements == ptr::null_mut() {
4496                _gl_impl_panic("glDrawElements");
4497                return;
4498            }
4499
4500            unsafe {
4501                let func: extern "system" fn(GLenum, GLsizei, GLenum, *const c_void) = mem::transmute(self.glDrawElements);
4502                return (func)(
4503                    mode,
4504                    count,
4505                    element_type,
4506                    indices_offset as *const c_void,
4507                );
4508            }
4509        }
4510
4511        $( $opt )? fn draw_elements_instanced(
4512            &self,
4513            mode: GLenum,
4514            count: GLsizei,
4515            element_type: GLenum,
4516            indices_offset: GLuint,
4517            primcount: GLsizei,
4518        ) {
4519
4520            #[cfg(feature = "debug")] { _gl_print_debug("glDrawElementsInstanced"); }
4521            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4522
4523            if self.glDrawElementsInstanced == ptr::null_mut() {
4524                _gl_impl_panic("glDrawElementsInstanced");
4525                return;
4526            }
4527
4528            unsafe {
4529                let func: extern "system" fn(GLenum, GLsizei, GLenum, *const c_void, GLsizei) = mem::transmute(self.glDrawElementsInstanced);
4530                return (func)(
4531                    mode,
4532                    count,
4533                    element_type,
4534                    indices_offset as *const c_void,
4535                    primcount,
4536                );
4537            }
4538        }
4539
4540        $( $opt )? fn blend_color(&self, r: f32, g: f32, b: f32, a: f32) {
4541
4542
4543            #[cfg(feature = "debug")] { _gl_print_debug("glBlendColor"); }
4544            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4545
4546            if self.glBlendColor == ptr::null_mut() {
4547                _gl_impl_panic("glBlendColor");
4548                return;
4549            }
4550
4551            unsafe {
4552                let func: extern "system" fn(GLclampf, GLclampf, GLclampf, GLclampf) = mem::transmute(self.glBlendColor);
4553                (func)(r, g, b, a);
4554            }
4555        }
4556
4557        $( $opt )? fn blend_func(&self, sfactor: GLenum, dfactor: GLenum) {
4558
4559
4560            #[cfg(feature = "debug")] { _gl_print_debug("glBlendFunc"); }
4561            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4562
4563            if self.glBlendFunc == ptr::null_mut() {
4564                _gl_impl_panic("glBlendFunc");
4565                return;
4566            }
4567
4568            unsafe {
4569                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glBlendFunc);
4570                (func)(sfactor, dfactor);
4571            }
4572        }
4573
4574        $( $opt )? fn blend_func_separate(
4575            &self,
4576            src_rgb: GLenum,
4577            dest_rgb: GLenum,
4578            src_alpha: GLenum,
4579            dest_alpha: GLenum,
4580        ) {
4581
4582            #[cfg(feature = "debug")] { _gl_print_debug("glBlendFuncSeparate"); }
4583            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4584
4585            if self.glBlendFuncSeparate == ptr::null_mut() {
4586                _gl_impl_panic("glBlendFuncSeparate");
4587                return;
4588            }
4589
4590            unsafe {
4591                let func: extern "system" fn(GLenum, GLenum, GLenum, GLenum) = mem::transmute(self.glBlendFuncSeparate);
4592                (func)(src_rgb, dest_rgb, src_alpha, dest_alpha);
4593            }
4594        }
4595
4596        $( $opt )? fn blend_equation(&self, mode: GLenum) {
4597
4598
4599            #[cfg(feature = "debug")] { _gl_print_debug("glBlendEquation"); }
4600            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4601
4602            if self.glBlendEquation == ptr::null_mut() {
4603                _gl_impl_panic("glBlendEquation");
4604                return;
4605            }
4606
4607            unsafe {
4608                let func: extern "system" fn(GLenum) = mem::transmute(self.glBlendEquation);
4609                (func)(mode);
4610            }
4611        }
4612
4613        $( $opt )? fn blend_equation_separate(&self, mode_rgb: GLenum, mode_alpha: GLenum) {
4614
4615
4616            #[cfg(feature = "debug")] { _gl_print_debug("glBlendEquationSeparate"); }
4617            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4618
4619            if self.glBlendEquationSeparate == ptr::null_mut() {
4620                _gl_impl_panic("glBlendEquationSeparate");
4621                return;
4622            }
4623
4624            unsafe {
4625                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glBlendEquationSeparate);
4626                (func)(mode_rgb, mode_alpha);
4627            }
4628        }
4629
4630        $( $opt )? fn color_mask(&self, r: bool, g: bool, b: bool, a: bool) {
4631
4632
4633            #[cfg(feature = "debug")] { _gl_print_debug("glColorMask"); }
4634            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4635
4636            if self.glColorMask == ptr::null_mut() {
4637                _gl_impl_panic("glColorMask");
4638                return;
4639            }
4640
4641            unsafe {
4642                let func: extern "system" fn(GLboolean, GLboolean, GLboolean, GLboolean) = mem::transmute(self.glColorMask);
4643                (func)(
4644                    r as GLboolean,
4645                    g as GLboolean,
4646                    b as GLboolean,
4647                    a as GLboolean,
4648                );
4649            }
4650        }
4651
4652        $( $opt )? fn cull_face(&self, mode: GLenum) {
4653
4654
4655            #[cfg(feature = "debug")] { _gl_print_debug("glCullFace"); }
4656            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4657
4658            if self.glCullFace == ptr::null_mut() {
4659                _gl_impl_panic("glCullFace");
4660                return;
4661            }
4662
4663            unsafe {
4664                let func: extern "system" fn(GLenum) = mem::transmute(self.glCullFace);
4665                (func)(mode);
4666            }
4667        }
4668
4669        $( $opt )? fn front_face(&self, mode: GLenum) {
4670
4671
4672            #[cfg(feature = "debug")] { _gl_print_debug("glFrontFace"); }
4673            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4674
4675            if self.glFrontFace == ptr::null_mut() {
4676                _gl_impl_panic("glFrontFace");
4677                return;
4678            }
4679
4680            unsafe {
4681                let func: extern "system" fn(GLenum) = mem::transmute(self.glFrontFace);
4682                (func)(mode);
4683            }
4684        }
4685
4686        $( $opt )? fn enable(&self, cap: GLenum) {
4687
4688
4689            #[cfg(feature = "debug")] { _gl_print_debug("glEnable"); }
4690            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4691
4692            if self.glEnable == ptr::null_mut() {
4693                _gl_impl_panic("glEnable");
4694                return;
4695            }
4696
4697            unsafe {
4698                let func: extern "system" fn(GLenum) = mem::transmute(self.glEnable);
4699                (func)(cap);
4700            }
4701        }
4702
4703        $( $opt )? fn disable(&self, cap: GLenum) {
4704
4705
4706            #[cfg(feature = "debug")] { _gl_print_debug("glDisable"); }
4707            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4708
4709            if self.glDisable == ptr::null_mut() {
4710                _gl_impl_panic("glDisable");
4711                return;
4712            }
4713
4714            unsafe {
4715                let func: extern "system" fn(GLenum) = mem::transmute(self.glDisable);
4716                (func)(cap);
4717            }
4718        }
4719
4720        $( $opt )? fn hint(&self, param_name: GLenum, param_val: GLenum) {
4721
4722
4723            #[cfg(feature = "debug")] { _gl_print_debug("glHint"); }
4724            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4725
4726            if self.glHint == ptr::null_mut() {
4727                _gl_impl_panic("glHint");
4728                return;
4729            }
4730
4731            unsafe {
4732                let func: extern "system" fn(GLenum, GLenum) = mem::transmute(self.glHint);
4733                (func)(param_name, param_val);
4734            }
4735        }
4736
4737        $( $opt )? fn is_enabled(&self, cap: GLenum) -> GLboolean {
4738
4739
4740            #[cfg(feature = "debug")] { _gl_print_debug("glIsEnabled"); }
4741            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4742
4743            if self.glIsEnabled == ptr::null_mut() {
4744                _gl_impl_panic("glIsEnabled");
4745                return 0;
4746            }
4747
4748            unsafe {
4749                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsEnabled);
4750                (func)(cap)
4751            }
4752        }
4753
4754        $( $opt )? fn is_shader(&self, shader: GLuint) -> GLboolean {
4755
4756
4757            #[cfg(feature = "debug")] { _gl_print_debug("glIsShader"); }
4758            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4759
4760            if self.glIsShader == ptr::null_mut() {
4761                _gl_impl_panic("glIsShader");
4762                return 0;
4763            }
4764
4765            unsafe {
4766                let func: extern "system" fn(GLuint) -> GLboolean = mem::transmute(self.glIsShader);
4767                (func)(shader)
4768            }
4769        }
4770
4771        $( $opt )? fn is_texture(&self, texture: GLenum) -> GLboolean {
4772
4773
4774            #[cfg(feature = "debug")] { _gl_print_debug("glIsTexture"); }
4775            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4776
4777            if self.glIsTexture == ptr::null_mut() {
4778                _gl_impl_panic("glIsTexture");
4779                return 0;
4780            }
4781
4782            unsafe {
4783                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsTexture);
4784                (func)(texture)
4785            }
4786        }
4787
4788        $( $opt )? fn is_framebuffer(&self, framebuffer: GLenum) -> GLboolean {
4789
4790
4791            #[cfg(feature = "debug")] { _gl_print_debug("glIsFramebuffer"); }
4792            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4793
4794            if self.glIsFramebuffer == ptr::null_mut() {
4795                _gl_impl_panic("glIsFramebuffer");
4796                return 0;
4797            }
4798
4799            unsafe {
4800                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsFramebuffer);
4801                (func)(framebuffer)
4802            }
4803        }
4804
4805        $( $opt )? fn is_renderbuffer(&self, renderbuffer: GLenum) -> GLboolean {
4806
4807
4808            #[cfg(feature = "debug")] { _gl_print_debug("glIsRenderbuffer"); }
4809            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4810
4811            if self.glIsRenderbuffer == ptr::null_mut() {
4812                _gl_impl_panic("glIsRenderbuffer");
4813                return 0;
4814            }
4815
4816            unsafe {
4817                let func: extern "system" fn(GLenum) -> GLboolean = mem::transmute(self.glIsRenderbuffer);
4818                (func)(renderbuffer)
4819            }
4820        }
4821
4822        $( $opt )? fn check_frame_buffer_status(&self, target: GLenum) -> GLenum {
4823
4824
4825            #[cfg(feature = "debug")] { _gl_print_debug("glCheckFramebufferStatus"); }
4826            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4827
4828            if self.glCheckFramebufferStatus == ptr::null_mut() {
4829                _gl_impl_panic("glCheckFramebufferStatus");
4830                return 0;
4831            }
4832
4833            unsafe {
4834                let func: extern "system" fn(GLenum) -> GLenum = mem::transmute(self.glCheckFramebufferStatus);
4835                (func)(target)
4836            }
4837        }
4838
4839        $( $opt )? fn enable_vertex_attrib_array(&self, index: GLuint) {
4840
4841
4842            #[cfg(feature = "debug")] { _gl_print_debug("glEnableVertexAttribArray"); }
4843            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4844
4845            if self.glEnableVertexAttribArray == ptr::null_mut() {
4846                _gl_impl_panic("glEnableVertexAttribArray");
4847                return;
4848            }
4849
4850            unsafe {
4851                let func: extern "system" fn(GLuint) = mem::transmute(self.glEnableVertexAttribArray);
4852                (func)(index);
4853            }
4854        }
4855
4856        $( $opt )? fn disable_vertex_attrib_array(&self, index: GLuint) {
4857
4858
4859            #[cfg(feature = "debug")] { _gl_print_debug("glDisableVertexAttribArray"); }
4860            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4861
4862            if self.glDisableVertexAttribArray == ptr::null_mut() {
4863                _gl_impl_panic("glDisableVertexAttribArray");
4864                return;
4865            }
4866
4867            unsafe {
4868                let func: extern "system" fn(GLuint) = mem::transmute(self.glDisableVertexAttribArray);
4869                (func)(index);
4870            }
4871        }
4872
4873        $( $opt )? fn uniform_1f(&self, location: GLint, v0: GLfloat) {
4874
4875
4876            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1f"); }
4877            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4878
4879            if self.glUniform1f == ptr::null_mut() {
4880                _gl_impl_panic("glUniform1f");
4881                return;
4882            }
4883
4884            unsafe {
4885                let func: extern "system" fn(GLint, GLfloat) = mem::transmute(self.glUniform1f);
4886                (func)(location, v0);
4887            }
4888        }
4889
4890        $( $opt )? fn uniform_1fv(&self, location: GLint, values: &[f32]) {
4891
4892
4893            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1fv"); }
4894            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4895
4896            if self.glUniform1fv == ptr::null_mut() {
4897                _gl_impl_panic("glUniform1fv");
4898                return;
4899            }
4900
4901            unsafe {
4902                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform1fv);
4903                (func)(location, values.len() as GLsizei, values.as_ptr());
4904            }
4905        }
4906
4907        $( $opt )? fn uniform_1i(&self, location: GLint, v0: GLint) {
4908
4909
4910            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1i"); }
4911            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4912
4913            if self.glUniform1i == ptr::null_mut() {
4914                _gl_impl_panic("glUniform1i");
4915                return;
4916            }
4917
4918            unsafe {
4919                let func: extern "system" fn(GLint, GLint) = mem::transmute(self.glUniform1i);
4920                (func)(location, v0);
4921            }
4922        }
4923
4924        $( $opt )? fn uniform_1iv(&self, location: GLint, values: &[i32]) {
4925
4926
4927            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1iv"); }
4928            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4929
4930            if self.glUniform1iv == ptr::null_mut() {
4931                _gl_impl_panic("glUniform1iv");
4932                return;
4933            }
4934
4935            unsafe {
4936                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform1iv);
4937                (func)(location, values.len() as GLsizei, values.as_ptr());
4938            }
4939        }
4940
4941        $( $opt )? fn uniform_1ui(&self, location: GLint, v0: GLuint) {
4942
4943
4944            #[cfg(feature = "debug")] { _gl_print_debug("glUniform1ui"); }
4945            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4946
4947            if self.glUniform1ui == ptr::null_mut() {
4948                _gl_impl_panic("glUniform1ui");
4949                return;
4950            }
4951
4952            unsafe {
4953                let func: extern "system" fn(GLint, GLuint) = mem::transmute(self.glUniform1ui);
4954                (func)(location, v0);
4955            }
4956        }
4957
4958        $( $opt )? fn uniform_2f(&self, location: GLint, v0: GLfloat, v1: GLfloat) {
4959
4960
4961            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2f"); }
4962            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4963
4964            if self.glUniform2f == ptr::null_mut() {
4965                _gl_impl_panic("glUniform2f");
4966                return;
4967            }
4968
4969            unsafe {
4970                let func: extern "system" fn(GLint, GLfloat, GLfloat) = mem::transmute(self.glUniform2f);
4971                (func)(location, v0, v1);
4972            }
4973        }
4974
4975        $( $opt )? fn uniform_2fv(&self, location: GLint, values: &[f32]) {
4976
4977
4978            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2fv"); }
4979            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4980
4981            if self.glUniform2fv == ptr::null_mut() {
4982                _gl_impl_panic("glUniform2fv");
4983                return;
4984            }
4985
4986            unsafe {
4987                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform2fv);
4988                (func)(location, (values.len() / 2) as GLsizei, values.as_ptr());
4989            }
4990        }
4991
4992        $( $opt )? fn uniform_2i(&self, location: GLint, v0: GLint, v1: GLint) {
4993
4994
4995            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2i"); }
4996            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
4997
4998            if self.glUniform2i == ptr::null_mut() {
4999                _gl_impl_panic("glUniform2i");
5000                return;
5001            }
5002
5003            unsafe {
5004                let func: extern "system" fn(GLint, GLint, GLint) = mem::transmute(self.glUniform2i);
5005                (func)(location, v0, v1);
5006            }
5007        }
5008
5009        $( $opt )? fn uniform_2iv(&self, location: GLint, values: &[i32]) {
5010
5011
5012            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2iv"); }
5013            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5014
5015            if self.glUniform2iv == ptr::null_mut() {
5016                _gl_impl_panic("glUniform2iv");
5017                return;
5018            }
5019
5020            unsafe {
5021                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform2iv);
5022                (func)(location, (values.len() / 2) as GLsizei, values.as_ptr());
5023            }
5024        }
5025
5026        $( $opt )? fn uniform_2ui(&self, location: GLint, v0: GLuint, v1: GLuint) {
5027
5028
5029            #[cfg(feature = "debug")] { _gl_print_debug("glUniform2ui"); }
5030            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5031
5032            if self.glUniform2ui == ptr::null_mut() {
5033                _gl_impl_panic("glUniform2ui");
5034                return;
5035            }
5036
5037            unsafe {
5038                let func: extern "system" fn(GLint, GLuint, GLuint) = mem::transmute(self.glUniform2ui);
5039                (func)(location, v0, v1);
5040            }
5041        }
5042
5043        $( $opt )? fn uniform_3f(&self, location: GLint, v0: GLfloat, v1: GLfloat, v2: GLfloat) {
5044
5045
5046            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3f"); }
5047            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5048
5049            if self.glUniform3f == ptr::null_mut() {
5050                _gl_impl_panic("glUniform3f");
5051                return;
5052            }
5053
5054            unsafe {
5055                let func: extern "system" fn(GLint, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glUniform3f);
5056                (func)(location, v0, v1, v2);
5057            }
5058        }
5059
5060        $( $opt )? fn uniform_3fv(&self, location: GLint, values: &[f32]) {
5061
5062
5063            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3fv"); }
5064            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5065
5066            if self.glUniform3fv == ptr::null_mut() {
5067                _gl_impl_panic("glUniform3fv");
5068                return;
5069            }
5070
5071            unsafe {
5072                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform3fv);
5073                (func)(location, (values.len() / 3) as GLsizei, values.as_ptr());
5074            }
5075        }
5076
5077        $( $opt )? fn uniform_3i(&self, location: GLint, v0: GLint, v1: GLint, v2: GLint) {
5078
5079
5080            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3i"); }
5081            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5082
5083            if self.glUniform3i == ptr::null_mut() {
5084                _gl_impl_panic("glUniform3i");
5085                return;
5086            }
5087
5088            unsafe {
5089                let func: extern "system" fn(GLint, GLint, GLint, GLint) = mem::transmute(self.glUniform3i);
5090                (func)(location, v0, v1, v2);
5091            }
5092        }
5093
5094        $( $opt )? fn uniform_3iv(&self, location: GLint, values: &[i32]) {
5095
5096
5097            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3iv"); }
5098            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5099
5100            if self.glUniform3iv == ptr::null_mut() {
5101                _gl_impl_panic("glUniform3iv");
5102                return;
5103            }
5104
5105            unsafe {
5106                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform3iv);
5107                (func)(location, (values.len() / 3) as GLsizei, values.as_ptr());
5108            }
5109        }
5110
5111        $( $opt )? fn uniform_3ui(&self, location: GLint, v0: GLuint, v1: GLuint, v2: GLuint) {
5112
5113
5114            #[cfg(feature = "debug")] { _gl_print_debug("glUniform3ui"); }
5115            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5116
5117            if self.glUniform3ui == ptr::null_mut() {
5118                _gl_impl_panic("glUniform3ui");
5119                return;
5120            }
5121
5122            unsafe {
5123                let func: extern "system" fn(GLint, GLuint, GLuint, GLuint) = mem::transmute(self.glUniform3ui);
5124                (func)(location, v0, v1, v2);
5125            }
5126        }
5127
5128        $( $opt )? fn uniform_4f(&self, location: GLint, x: GLfloat, y: GLfloat, z: GLfloat, w: GLfloat) {
5129
5130
5131            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4f"); }
5132            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5133
5134            if self.glUniform4f == ptr::null_mut() {
5135                _gl_impl_panic("glUniform4f");
5136                return;
5137            }
5138
5139            unsafe {
5140                let func: extern "system" fn(GLint, GLfloat, GLfloat, GLfloat, GLfloat) = mem::transmute(self.glUniform4f);
5141                (func)(location, x, y, z, w);
5142            }
5143        }
5144
5145        $( $opt )? fn uniform_4i(&self, location: GLint, x: GLint, y: GLint, z: GLint, w: GLint) {
5146
5147
5148            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4i"); }
5149            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5150
5151            if self.glUniform4i == ptr::null_mut() {
5152                _gl_impl_panic("glUniform4i");
5153                return;
5154            }
5155
5156            unsafe {
5157                let func: extern "system" fn(GLint, GLint, GLint, GLint, GLint) = mem::transmute(self.glUniform4i);
5158                (func)(location, x, y, z, w);
5159            }
5160        }
5161
5162        $( $opt )? fn uniform_4iv(&self, location: GLint, values: &[i32]) {
5163
5164
5165            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4iv"); }
5166            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5167
5168            if self.glUniform4iv == ptr::null_mut() {
5169                _gl_impl_panic("glUniform4iv");
5170                return;
5171            }
5172
5173            unsafe {
5174                let func: extern "system" fn(GLint, GLsizei, *const GLint) = mem::transmute(self.glUniform4iv);
5175                (func)(location, (values.len() / 4) as GLsizei, values.as_ptr());
5176            }
5177        }
5178
5179        $( $opt )? fn uniform_4ui(&self, location: GLint, x: GLuint, y: GLuint, z: GLuint, w: GLuint) {
5180
5181
5182            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4ui"); }
5183            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5184
5185            if self.glUniform4ui == ptr::null_mut() {
5186                _gl_impl_panic("glUniform4ui");
5187                return;
5188            }
5189
5190            unsafe {
5191                let func: extern "system" fn(GLint, GLuint, GLuint, GLuint, GLuint) = mem::transmute(self.glUniform4ui);
5192                (func)(location, x, y, z, w);
5193            }
5194        }
5195
5196        $( $opt )? fn uniform_4fv(&self, location: GLint, values: &[f32]) {
5197
5198
5199            #[cfg(feature = "debug")] { _gl_print_debug("glUniform4fv"); }
5200            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5201
5202            if self.glUniform4fv == ptr::null_mut() {
5203                _gl_impl_panic("glUniform4fv");
5204                return;
5205            }
5206
5207            unsafe {
5208                let func: extern "system" fn(GLint, GLsizei, *const GLfloat) = mem::transmute(self.glUniform4fv);
5209                (func)(location, (values.len() / 4) as GLsizei, values.as_ptr());
5210            }
5211        }
5212
5213        $( $opt )? fn uniform_matrix_2fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5214
5215
5216            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix2fv"); }
5217            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5218
5219            if self.glUniformMatrix2fv == ptr::null_mut() {
5220                _gl_impl_panic("glUniformMatrix2fv");
5221                return;
5222            }
5223
5224            unsafe {
5225                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix2fv);
5226                (func)(
5227                    location,
5228                    (value.len() / 4) as GLsizei,
5229                    transpose as GLboolean,
5230                    value.as_ptr(),
5231                );
5232            }
5233        }
5234
5235        $( $opt )? fn uniform_matrix_3fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5236
5237
5238            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix3fv"); }
5239            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5240
5241            if self.glUniformMatrix3fv == ptr::null_mut() {
5242                _gl_impl_panic("glUniformMatrix3fv");
5243                return;
5244            }
5245
5246            unsafe {
5247                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix3fv);
5248                (func)(
5249                    location,
5250                    (value.len() / 9) as GLsizei,
5251                    transpose as GLboolean,
5252                    value.as_ptr(),
5253                );
5254            }
5255        }
5256
5257        $( $opt )? fn uniform_matrix_4fv(&self, location: GLint, transpose: bool, value: &[f32]) {
5258
5259
5260            #[cfg(feature = "debug")] { _gl_print_debug("glUniformMatrix4fv"); }
5261            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5262
5263            if self.glUniformMatrix4fv == ptr::null_mut() {
5264                _gl_impl_panic("glUniformMatrix4fv");
5265                return;
5266            }
5267
5268            unsafe {
5269                let func: extern "system" fn(GLint, GLsizei, GLboolean, *const GLfloat) = mem::transmute(self.glUniformMatrix4fv);
5270                (func)(
5271                    location,
5272                    (value.len() / 16) as GLsizei,
5273                    transpose as GLboolean,
5274                    value.as_ptr(),
5275                );
5276            }
5277        }
5278
5279        $( $opt )? fn depth_mask(&self, flag: bool) {
5280
5281
5282            #[cfg(feature = "debug")] { _gl_print_debug("glDepthMask"); }
5283            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5284
5285            if self.glDepthMask == ptr::null_mut() {
5286                _gl_impl_panic("glDepthMask");
5287                return;
5288            }
5289
5290            unsafe {
5291                let func: extern "system" fn(GLboolean) = mem::transmute(self.glDepthMask);
5292                (func)(flag as GLboolean);
5293            }
5294        }
5295
5296        $( $opt )? fn depth_range(&self, near: f64, far: f64) {
5297
5298
5299            #[cfg(feature = "debug")] { _gl_print_debug("glDepthRange"); }
5300            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5301
5302            if self.glDepthRange == ptr::null_mut() {
5303                _gl_impl_panic("glDepthRange");
5304                return;
5305            }
5306
5307            unsafe {
5308                let func: extern "system" fn(GLclampd, GLclampd) = mem::transmute(self.glDepthRange);
5309                (func)(near as GLclampd, far as GLclampd);
5310            }
5311        }
5312
5313        $( $opt )? fn get_active_attrib(&self, program: GLuint, index: GLuint) -> (i32, u32, String) {
5314
5315
5316            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveAttrib"); }
5317            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5318
5319            if self.glGetActiveAttrib == ptr::null_mut() {
5320                _gl_impl_panic("glGetActiveAttrib");
5321                return (0, 0, String::new());
5322            }
5323
5324            let mut buf_size = [0];
5325            unsafe {
5326                self.get_program_iv(program, gl::ACTIVE_ATTRIBUTE_MAX_LENGTH, &mut buf_size);
5327            }
5328            let mut name = vec![0u8; buf_size[0] as usize];
5329            let mut length = 0 as GLsizei;
5330            let mut size = 0 as i32;
5331            let mut type_ = 0 as u32;
5332            unsafe {
5333                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLint, *mut GLenum, *mut GLchar) = mem::transmute(self.glGetActiveAttrib);
5334                (func)(
5335                    program,
5336                    index,
5337                    buf_size[0],
5338                    &mut length,
5339                    &mut size,
5340                    &mut type_,
5341                    name.as_mut_ptr() as *mut GLchar,
5342                );
5343            }
5344            name.truncate(if length > 0 { length as usize } else { 0 });
5345            (size, type_, String::from_utf8(name).unwrap())
5346        }
5347
5348        $( $opt )? fn get_active_uniform(&self, program: GLuint, index: GLuint) -> (i32, u32, String) {
5349
5350
5351            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniform"); }
5352            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5353
5354            if self.glGetActiveUniform == ptr::null_mut() {
5355                _gl_impl_panic("glGetActiveUniform");
5356                return (0, 0, String::new());
5357            }
5358
5359            let mut buf_size = [0];
5360            unsafe {
5361                self.get_program_iv(program, gl::ACTIVE_UNIFORM_MAX_LENGTH, &mut buf_size);
5362            }
5363            let mut name = vec![0 as u8; buf_size[0] as usize];
5364            let mut length: GLsizei = 0;
5365            let mut size: i32 = 0;
5366            let mut type_: u32 = 0;
5367
5368            unsafe {
5369                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLint, *mut GLenum, *mut GLchar) = mem::transmute(self.glGetActiveUniform);
5370                (func)(
5371                    program,
5372                    index,
5373                    buf_size[0],
5374                    &mut length,
5375                    &mut size,
5376                    &mut type_,
5377                    name.as_mut_ptr() as *mut GLchar,
5378                );
5379            }
5380
5381            name.truncate(if length > 0 { length as usize } else { 0 });
5382
5383            (size, type_, String::from_utf8(name).unwrap())
5384        }
5385
5386        $( $opt )? fn get_active_uniforms_iv(
5387            &self,
5388            program: GLuint,
5389            indices: Vec<GLuint>,
5390            pname: GLenum,
5391        ) -> Vec<GLint> {
5392
5393
5394            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformsiv"); }
5395            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5396
5397            if self.glGetActiveUniformsiv == ptr::null_mut() {
5398                _gl_impl_panic("glGetActiveUniformsiv");
5399                return Vec::new();
5400            }
5401
5402            let mut result = Vec::with_capacity(indices.len());
5403            unsafe {
5404                result.set_len(indices.len());
5405                let func: extern "system" fn(GLuint, GLsizei, *const GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformsiv);
5406                (func)(
5407                    program,
5408                    indices.len() as GLsizei,
5409                    indices.as_ptr(),
5410                    pname,
5411                    result.as_mut_ptr(),
5412                );
5413            }
5414            result
5415        }
5416
5417        $( $opt )? fn get_active_uniform_block_i(&self, program: GLuint, index: GLuint, pname: GLenum) -> GLint {
5418
5419
5420            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockiv"); }
5421            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5422
5423            if self.glGetActiveUniformBlockiv == ptr::null_mut() {
5424                _gl_impl_panic("glGetActiveUniformBlockiv");
5425                return 0;
5426            }
5427
5428            let mut result = 0;
5429            unsafe {
5430                let func: extern "system" fn(GLuint, GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformBlockiv);
5431                (func)(program, index, pname, &mut result);
5432            }
5433            result
5434        }
5435
5436        $( $opt )? fn get_active_uniform_block_iv(
5437            &self,
5438            program: GLuint,
5439            index: GLuint,
5440            pname: GLenum,
5441        ) -> Vec<GLint> {
5442
5443
5444            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockiv"); }
5445            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5446
5447            if self.glGetActiveUniformBlockiv == ptr::null_mut() {
5448                _gl_impl_panic("glGetActiveUniformBlockiv");
5449                return Vec::new();
5450            }
5451
5452            let count = self.get_active_uniform_block_i(program, index, gl::UNIFORM_BLOCK_ACTIVE_UNIFORMS);
5453            let mut result = Vec::with_capacity(count as usize);
5454            unsafe {
5455                result.set_len(count as usize);
5456                let func: extern "system" fn(GLuint, GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetActiveUniformBlockiv);
5457                (func)(program, index, pname, result.as_mut_ptr());
5458            }
5459            result
5460        }
5461
5462        $( $opt )? fn get_active_uniform_block_name(&self, program: GLuint, index: GLuint) -> String {
5463
5464
5465            #[cfg(feature = "debug")] { _gl_print_debug("glGetActiveUniformBlockName"); }
5466            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5467
5468            if self.glGetActiveUniformBlockName == ptr::null_mut() {
5469                _gl_impl_panic("glGetActiveUniformBlockName");
5470                return String::new();
5471            }
5472
5473            let buf_size = self.get_active_uniform_block_i(program, index, gl::UNIFORM_BLOCK_NAME_LENGTH);
5474            let mut name = vec![0 as u8; buf_size as usize];
5475            let mut length: GLsizei = 0;
5476            unsafe {
5477                let func: extern "system" fn(GLuint, GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetActiveUniformBlockName);
5478                (func)(
5479                    program,
5480                    index,
5481                    buf_size,
5482                    &mut length,
5483                    name.as_mut_ptr() as *mut GLchar,
5484                );
5485            }
5486            name.truncate(if length > 0 { length as usize } else { 0 });
5487
5488            String::from_utf8(name).unwrap()
5489        }
5490
5491        $( $opt )? fn get_attrib_location(&self, program: GLuint, name: &str) -> c_int {
5492
5493
5494            #[cfg(feature = "debug")] { _gl_print_debug("glGetAttribLocation"); }
5495            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5496
5497            if self.glGetAttribLocation == ptr::null_mut() {
5498                _gl_impl_panic("glGetAttribLocation");
5499                return 0;
5500            }
5501
5502            let name = encode_ascii(name);
5503            unsafe {
5504                let func: extern "system" fn(GLuint, *const GLchar) -> c_int = mem::transmute(self.glGetAttribLocation);
5505                (func)(program, name.as_ptr())
5506            }
5507        }
5508
5509        $( $opt )? fn get_frag_data_location(&self, program: GLuint, name: &str) -> c_int {
5510
5511
5512            #[cfg(feature = "debug")] { _gl_print_debug("glGetFragDataLocation"); }
5513            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5514
5515            if self.glGetFragDataLocation == ptr::null_mut() {
5516                _gl_impl_panic("glGetFragDataLocation");
5517                return 0;
5518            }
5519
5520            let name = encode_ascii(name);
5521            unsafe {
5522                let func: extern "system" fn(GLuint, *const c_char)  -> c_int = mem::transmute(self.glGetFragDataLocation);
5523                (func)(program, name.as_ptr())
5524            }
5525        }
5526
5527        $( $opt )? fn get_uniform_location(&self, program: GLuint, name: &str) -> c_int {
5528
5529
5530            #[cfg(feature = "debug")] { _gl_print_debug("glGetUniformLocation"); }
5531            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5532
5533            if self.glGetUniformLocation == ptr::null_mut() {
5534                _gl_impl_panic("glGetUniformLocation");
5535                return 0;
5536            }
5537
5538            let name = encode_ascii(name);
5539            unsafe {
5540                let func: extern "system" fn(GLuint, *const GLchar)  -> c_int = mem::transmute(self.glGetUniformLocation);
5541                (func)(program, name.as_ptr())
5542            }
5543        }
5544
5545        $( $opt )? fn get_program_info_log(&self, program: GLuint) -> String {
5546
5547
5548            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramInfoLog"); }
5549            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5550
5551            if self.glGetProgramInfoLog == ptr::null_mut() {
5552                _gl_impl_panic("glGetProgramInfoLog");
5553                return String::new();
5554            }
5555
5556            let mut max_len = [0];
5557            unsafe {
5558                self.get_program_iv(program, gl::INFO_LOG_LENGTH, &mut max_len);
5559            }
5560            if max_len[0] == 0 {
5561                return String::new();
5562            }
5563            let mut result = vec![0u8; max_len[0] as usize];
5564            let mut result_len = 0 as GLsizei;
5565            unsafe {
5566                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetProgramInfoLog);
5567                (func)(
5568                    program,
5569                    max_len[0] as GLsizei,
5570                    &mut result_len,
5571                    result.as_mut_ptr() as *mut GLchar,
5572                );
5573            }
5574            result.truncate(if result_len > 0 {
5575                result_len as usize
5576            } else {
5577                0
5578            });
5579            String::from_utf8(result).unwrap()
5580        }
5581
5582        #[inline]
5583        $( $opt )? unsafe fn get_program_iv(&self, program: GLuint, pname: GLenum, result: &mut [GLint]) {
5584
5585            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramiv"); }
5586            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5587
5588            if self.glGetProgramiv == ptr::null_mut() {
5589                _gl_impl_panic("glGetProgramiv");
5590                return;
5591            }
5592            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetProgramiv);
5593            (func)(program, pname, result.as_mut_ptr());
5594        }
5595
5596        $( $opt )? fn get_program_binary(&self, program: GLuint) -> (Vec<u8>, GLenum) {
5597
5598            const NONE: GLenum = 0;
5599
5600
5601            #[cfg(feature = "debug")] { _gl_print_debug("glGetProgramBinary"); }
5602            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5603
5604            if self.glGetProgramBinary == ptr::null_mut() {
5605                _gl_impl_panic("glGetProgramBinary");
5606                return (Vec::new(), NONE);
5607            }
5608
5609            let mut len = [0];
5610            unsafe {
5611                self.get_program_iv(program, gl::PROGRAM_BINARY_LENGTH, &mut len);
5612            }
5613            if len[0] <= 0 {
5614                return (Vec::new(), NONE);
5615            }
5616            let mut binary: Vec<u8> = Vec::with_capacity(len[0] as usize);
5617            let mut format = NONE;
5618            let mut out_len = 0;
5619            unsafe {
5620                binary.set_len(len[0] as usize);
5621                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLenum, *mut c_void) = mem::transmute(self.glGetProgramBinary);
5622                (func)(
5623                    program,
5624                    len[0],
5625                    &mut out_len as *mut GLsizei,
5626                    &mut format,
5627                    binary.as_mut_ptr() as *mut c_void,
5628                );
5629            }
5630            if len[0] != out_len {
5631                return (Vec::new(), NONE);
5632            }
5633
5634            (binary, format)
5635        }
5636
5637        $( $opt )? fn program_binary(&self, program: GLuint, format: GLenum, binary: &[u8]) {
5638
5639            #[cfg(feature = "debug")] { _gl_print_debug("glProgramBinary"); }
5640            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5641
5642            if self.glProgramBinary == ptr::null_mut() {
5643                _gl_impl_panic("glProgramBinary");
5644                return;
5645            }
5646
5647            unsafe {
5648                let func: extern "system" fn(GLuint, GLenum, *const c_void, GLsizei) = mem::transmute(self.glProgramBinary);
5649                (func)(
5650                    program,
5651                    format,
5652                    binary.as_ptr() as *const c_void,
5653                    binary.len() as GLsizei,
5654                );
5655            }
5656        }
5657
5658        $( $opt )? fn program_parameter_i(&self, program: GLuint, pname: GLenum, value: GLint) {
5659
5660            #[cfg(feature = "debug")] { _gl_print_debug("glProgramParameteri"); }
5661            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5662
5663            if self.glProgramParameteri == ptr::null_mut() {
5664                _gl_impl_panic("glProgramParameteri");
5665                return;
5666            }
5667            unsafe {
5668                let func: extern "system" fn(GLuint, GLenum, GLint) = mem::transmute(self.glProgramParameteri);
5669                (func)(program, pname, value);
5670            }
5671        }
5672
5673        #[inline]
5674        $( $opt )? unsafe fn get_vertex_attrib_iv(&self, index: GLuint, pname: GLenum, result: &mut [GLint]) {
5675
5676            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribiv"); }
5677            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5678
5679            if self.glGetVertexAttribiv == ptr::null_mut() {
5680                _gl_impl_panic("glGetVertexAttribiv");
5681                return;
5682            }
5683            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetVertexAttribiv);
5684            (func)(index, pname, result.as_mut_ptr());
5685        }
5686
5687        #[inline]
5688        $( $opt )? unsafe fn get_vertex_attrib_fv(&self, index: GLuint, pname: GLenum, result: &mut [GLfloat]) {
5689
5690            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribfv"); }
5691            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5692
5693            if self.glGetVertexAttribfv == ptr::null_mut() {
5694                _gl_impl_panic("glGetVertexAttribfv");
5695                return;
5696            }
5697            let func: extern "system" fn(GLuint, GLenum, *mut GLfloat) = mem::transmute(self.glGetVertexAttribfv);
5698            (func)(index, pname, result.as_mut_ptr());
5699        }
5700
5701        $( $opt )? fn get_vertex_attrib_pointer_v(&self, index: GLuint, pname: GLenum) -> GLsizeiptr {
5702
5703
5704            #[cfg(feature = "debug")] { _gl_print_debug("glGetVertexAttribPointerv"); }
5705            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5706
5707            if self.glGetVertexAttribPointerv == ptr::null_mut() {
5708                _gl_impl_panic("glGetVertexAttribPointerv");
5709                return 0;
5710            }
5711
5712            let mut result = 0 as *mut GLvoid;
5713            unsafe {
5714                let func: extern "system" fn(GLuint, GLenum, *mut *mut GLvoid) = mem::transmute(self.glGetVertexAttribPointerv);
5715                (func)(index, pname, &mut result)
5716            }
5717            result as GLsizeiptr
5718        }
5719
5720        $( $opt )? fn get_buffer_parameter_iv(&self, target: GLuint, pname: GLenum) -> GLint {
5721
5722
5723            #[cfg(feature = "debug")] { _gl_print_debug("glGetBufferParameteriv"); }
5724            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5725
5726            if self.glGetBufferParameteriv == ptr::null_mut() {
5727                _gl_impl_panic("glGetBufferParameteriv");
5728                return 0;
5729            }
5730
5731            let mut result = 0 as GLint;
5732            unsafe {
5733                let func: extern "system" fn(GLenum, GLenum, *mut GLint) = mem::transmute(self.glGetBufferParameteriv);
5734                (func)(target, pname, &mut result);
5735            }
5736            result
5737        }
5738
5739        $( $opt )? fn get_shader_info_log(&self, shader: GLuint) -> String {
5740
5741
5742            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderInfoLog"); }
5743            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5744
5745            if self.glGetShaderInfoLog == ptr::null_mut() {
5746                _gl_impl_panic("glGetShaderInfoLog");
5747                return String::new();
5748            }
5749
5750            let mut max_len = [0];
5751            unsafe {
5752                self.get_shader_iv(shader, gl::INFO_LOG_LENGTH, &mut max_len);
5753            }
5754            if max_len[0] == 0 {
5755                return String::new();
5756            }
5757            let mut result = vec![0u8; max_len[0] as usize];
5758            let mut result_len = 0 as GLsizei;
5759            unsafe {
5760                let func: extern "system" fn(GLuint, GLsizei, *mut GLsizei, *mut GLchar) = mem::transmute(self.glGetShaderInfoLog);
5761                (func)(
5762                    shader,
5763                    max_len[0] as GLsizei,
5764                    &mut result_len,
5765                    result.as_mut_ptr() as *mut GLchar,
5766                );
5767            }
5768            result.truncate(if result_len > 0 {
5769                result_len as usize
5770            } else {
5771                0
5772            });
5773            String::from_utf8(result).unwrap()
5774        }
5775
5776        $( $opt )? fn get_string(&self, which: GLenum) -> String {
5777
5778
5779            #[cfg(feature = "debug")] { _gl_print_debug("glGetString"); }
5780            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5781
5782            if self.glGetString == ptr::null_mut() {
5783                _gl_impl_panic("glGetString");
5784                return String::new();
5785            }
5786
5787            unsafe {
5788                let func: extern "system" fn(GLenum) -> *mut GLubyte = mem::transmute(self.glGetString);
5789                let llstr = (func)(which);
5790                if !llstr.is_null() {
5791                    cstr_from_ptr(llstr as *const c_char).to_string()
5792                } else {
5793                    String::new()
5794                }
5795            }
5796        }
5797
5798        $( $opt )? fn get_string_i(&self, which: GLenum, index: GLuint) -> String {
5799
5800
5801            #[cfg(feature = "debug")] { _gl_print_debug("glGetStringi"); }
5802            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5803
5804            if self.glGetStringi == ptr::null_mut() {
5805                _gl_impl_panic("glGetStringi");
5806                return String::new();
5807            }
5808
5809            unsafe {
5810                let func: extern "system" fn(GLenum, GLuint) -> *mut GLubyte = mem::transmute(self.glGetStringi);
5811                let llstr = (func)(which, index);
5812                if !llstr.is_null() {
5813                    cstr_from_ptr(llstr as *const c_char).to_string()
5814                } else {
5815                    String::new()
5816                }
5817            }
5818        }
5819
5820        $( $opt )? unsafe fn get_shader_iv(&self, shader: GLuint, pname: GLenum, result: &mut [GLint]) {
5821
5822
5823            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderiv"); }
5824            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5825
5826            if self.glGetShaderiv == ptr::null_mut() {
5827                _gl_impl_panic("glGetShaderiv");
5828                return;
5829            }
5830
5831            let func: extern "system" fn(GLuint, GLenum, *mut GLint) = mem::transmute(self.glGetShaderiv);
5832            (func)(shader, pname, result.as_mut_ptr());
5833        }
5834
5835        $( $opt )? fn get_shader_precision_format(
5836            &self,
5837            _shader_type: GLuint,
5838            precision_type: GLuint,
5839        ) -> (GLint, GLint, GLint) {
5840
5841
5842            #[cfg(feature = "debug")] { _gl_print_debug("glGetShaderPrecisionFormat"); }
5843            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5844
5845            // if self.glGetShaderPrecisionFormat == ptr::null_mut() {
5846            //     _gl_impl_panic("glGetShaderPrecisionFormat");
5847            //     return (0, 0, 0);
5848            // }
5849
5850            // gl.GetShaderPrecisionFormat is not available until OpenGL 4.1.
5851            // Fallback to OpenGL standard precissions that most desktop hardware support.
5852            match precision_type {
5853                gl::LOW_FLOAT | gl::MEDIUM_FLOAT | gl::HIGH_FLOAT => {
5854                    // Fallback to IEEE 754 single precision
5855                    // Range: from -2^127 to 2^127
5856                    // Significand precision: 23 bits
5857                    (127, 127, 23)
5858                }
5859                gl::LOW_INT | gl::MEDIUM_INT | gl::HIGH_INT => {
5860                    // Fallback to single precision integer
5861                    // Range: from -2^24 to 2^24
5862                    // Precision: For integer formats this value is always 0
5863                    (24, 24, 0)
5864                }
5865                _ => (0, 0, 0),
5866            }
5867        }
5868
5869        $( $opt )? fn compile_shader(&self, shader: GLuint) {
5870
5871
5872            #[cfg(feature = "debug")] { _gl_print_debug("glCompileShader"); }
5873            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5874
5875            if self.glCompileShader == ptr::null_mut() {
5876                _gl_impl_panic("glCompileShader");
5877                return;
5878            }
5879
5880            unsafe {
5881                let func: extern "system" fn(GLuint) = mem::transmute(self.glCompileShader);
5882                (func)(shader);
5883            }
5884        }
5885
5886        $( $opt )? fn create_program(&self) -> GLuint {
5887
5888
5889            #[cfg(feature = "debug")] { _gl_print_debug("glCreateProgram"); }
5890            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5891
5892            if self.glCreateProgram == ptr::null_mut() {
5893                _gl_impl_panic("glCreateProgram");
5894                return 0;
5895            }
5896
5897            unsafe {
5898                let func: extern "system" fn() -> GLuint = mem::transmute(self.glCreateProgram);
5899                return (func)();
5900            }
5901        }
5902
5903        $( $opt )? fn delete_program(&self, program: GLuint) {
5904
5905
5906            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteProgram"); }
5907            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5908
5909            if self.glDeleteProgram == ptr::null_mut() {
5910                _gl_impl_panic("glDeleteProgram");
5911                return;
5912            }
5913
5914            unsafe {
5915                let func: extern "system" fn(GLuint) = mem::transmute(self.glDeleteProgram);
5916                (func)(program);
5917            }
5918        }
5919
5920        $( $opt )? fn create_shader(&self, shader_type: GLenum) -> GLuint {
5921
5922
5923            #[cfg(feature = "debug")] { _gl_print_debug("glCreateShader"); }
5924            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5925
5926            if self.glCreateShader == ptr::null_mut() {
5927                _gl_impl_panic("glCreateShader");
5928                return 0;
5929            }
5930
5931            unsafe {
5932                let func: extern "system" fn(GLenum) -> GLuint = mem::transmute(self.glCreateShader);
5933                return (func)(shader_type);
5934            }
5935        }
5936
5937        $( $opt )? fn delete_shader(&self, shader: GLuint) {
5938
5939
5940            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteShader"); }
5941            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5942
5943            if self.glDeleteShader == ptr::null_mut() {
5944                _gl_impl_panic("glDeleteShader");
5945                return;
5946            }
5947
5948            unsafe {
5949                let func: extern "system" fn(GLuint) = mem::transmute(self.glDeleteShader);
5950                (func)(shader);
5951            }
5952        }
5953
5954        $( $opt )? fn detach_shader(&self, program: GLuint, shader: GLuint) {
5955
5956
5957            #[cfg(feature = "debug")] { _gl_print_debug("glDetachShader"); }
5958            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5959
5960            if self.glDetachShader == ptr::null_mut() {
5961                _gl_impl_panic("glDetachShader");
5962                return;
5963            }
5964
5965            unsafe {
5966                let func: extern "system" fn(GLuint, GLuint) = mem::transmute(self.glDetachShader);
5967                (func)(program, shader);
5968            }
5969        }
5970
5971        $( $opt )? fn link_program(&self, program: GLuint) {
5972
5973
5974            #[cfg(feature = "debug")] { _gl_print_debug("glLinkProgram"); }
5975            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5976
5977            if self.glLinkProgram == ptr::null_mut() {
5978                _gl_impl_panic("glLinkProgram");
5979                return;
5980            }
5981
5982            unsafe {
5983                let func: extern "system" fn(GLuint) = mem::transmute(self.glLinkProgram);
5984                return (func)(program);
5985            }
5986        }
5987
5988        $( $opt )? fn clear_color(&self, r: f32, g: f32, b: f32, a: f32) {
5989
5990
5991            #[cfg(feature = "debug")] { _gl_print_debug("glClearColor"); }
5992            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
5993
5994            if self.glClearColor == ptr::null_mut() {
5995                _gl_impl_panic("glClearColor");
5996                return;
5997            }
5998
5999            unsafe {
6000                let func: extern "system" fn(GLclampf, GLclampf, GLclampf, GLclampf) = mem::transmute(self.glClearColor);
6001                (func)(r, g, b, a);
6002            }
6003        }
6004
6005        $( $opt )? fn clear(&self, buffer_mask: GLbitfield) {
6006
6007
6008            #[cfg(feature = "debug")] { _gl_print_debug("glClear"); }
6009            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6010
6011            if self.glClear == ptr::null_mut() {
6012                _gl_impl_panic("glClear");
6013                return;
6014            }
6015
6016            unsafe {
6017                let func: extern "system" fn(GLbitfield) = mem::transmute(self.glClear);
6018                (func)(buffer_mask);
6019            }
6020        }
6021
6022        $( $opt )? fn clear_depth(&self, depth: f64) {
6023
6024
6025            #[cfg(feature = "debug")] { _gl_print_debug("glClearDepth"); }
6026            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6027
6028            if self.glClearDepth == ptr::null_mut() {
6029                _gl_impl_panic("glClearDepth");
6030                return;
6031            }
6032
6033            unsafe {
6034                let func: extern "system" fn(GLclampd) = mem::transmute(self.glClearDepth);
6035                (func)(depth as GLclampd);
6036            }
6037        }
6038
6039        $( $opt )? fn clear_stencil(&self, s: GLint) {
6040
6041
6042            #[cfg(feature = "debug")] { _gl_print_debug("glClearStencil"); }
6043            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6044
6045            if self.glClearStencil == ptr::null_mut() {
6046                _gl_impl_panic("glClearStencil");
6047                return;
6048            }
6049
6050            unsafe {
6051                let func: extern "system" fn(GLint) = mem::transmute(self.glClearStencil);
6052                (func)(s);
6053            }
6054        }
6055
6056        $( $opt )? fn flush(&self) {
6057
6058
6059            #[cfg(feature = "debug")] { _gl_print_debug("glFlush"); }
6060            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6061
6062            if self.glFlush == ptr::null_mut() {
6063                _gl_impl_panic("glFlush");
6064                return;
6065            }
6066
6067            unsafe {
6068                let func: extern "system" fn() = mem::transmute(self.glFlush);
6069                (func)();
6070            }
6071        }
6072
6073        $( $opt )? fn finish(&self) {
6074
6075
6076            #[cfg(feature = "debug")] { _gl_print_debug("glFinish"); }
6077            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6078
6079            if self.glFinish == ptr::null_mut() {
6080                _gl_impl_panic("glFinish");
6081                return;
6082            }
6083
6084            unsafe {
6085                let func: extern "system" fn() = mem::transmute(self.glFinish);
6086                (func)();
6087            }
6088        }
6089
6090        $( $opt )? fn get_error(&self) -> GLenum {
6091
6092
6093            #[cfg(feature = "debug")] { #[cfg(not(feature = "error"))] { _gl_print_debug("glGetError"); } }
6094
6095            if self.glGetError == ptr::null_mut() {
6096                _gl_impl_panic("glGetError");
6097                return 0;
6098            }
6099
6100            unsafe {
6101                let func: extern "system" fn() -> GLenum = mem::transmute(self.glGetError);
6102                (func)()
6103            }
6104        }
6105
6106        $( $opt )? fn stencil_mask(&self, mask: GLuint) {
6107
6108
6109            #[cfg(feature = "debug")] { _gl_print_debug("glStencilMask"); }
6110            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6111
6112            if self.glStencilMask == ptr::null_mut() {
6113                _gl_impl_panic("glStencilMask");
6114                return;
6115            }
6116
6117            unsafe {
6118                let func: extern "system" fn(GLuint) = mem::transmute(self.glStencilMask);
6119                (func)(mask)
6120            }
6121        }
6122
6123        $( $opt )? fn stencil_mask_separate(&self, face: GLenum, mask: GLuint) {
6124
6125
6126            #[cfg(feature = "debug")] { _gl_print_debug("glStencilMaskSeparate"); }
6127            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6128
6129            if self.glStencilMaskSeparate == ptr::null_mut() {
6130                _gl_impl_panic("glStencilMaskSeparate");
6131                return;
6132            }
6133
6134            unsafe {
6135                let func: extern "system" fn(GLenum, GLuint) = mem::transmute(self.glStencilMaskSeparate);
6136                (func)(face, mask)
6137            }
6138        }
6139
6140        $( $opt )? fn stencil_func(&self, func: GLenum, ref_: GLint, mask: GLuint) {
6141
6142
6143            #[cfg(feature = "debug")] { _gl_print_debug("glStencilFunc"); }
6144            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6145
6146            if self.glStencilFunc == ptr::null_mut() {
6147                _gl_impl_panic("glStencilFunc");
6148                return;
6149            }
6150
6151            unsafe {
6152                let glStencilFunc: extern "system" fn(GLenum, GLint, GLuint) = mem::transmute(self.glStencilFunc);
6153                (glStencilFunc)(func, ref_, mask)
6154            }
6155        }
6156
6157        $( $opt )? fn stencil_func_separate(&self, face: GLenum, func: GLenum, ref_: GLint, mask: GLuint) {
6158
6159
6160            #[cfg(feature = "debug")] { _gl_print_debug("glStencilFuncSeparate"); }
6161            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6162
6163            if self.glStencilFuncSeparate == ptr::null_mut() {
6164                _gl_impl_panic("glStencilFuncSeparate");
6165                return;
6166            }
6167
6168            unsafe {
6169                let glStencilFuncSeparate: extern "system" fn(GLenum, GLenum, GLint, GLuint) = mem::transmute(self.glStencilFuncSeparate);
6170                (glStencilFuncSeparate)(face, func, ref_, mask)
6171            }
6172        }
6173
6174        $( $opt )? fn stencil_op(&self, sfail: GLenum, dpfail: GLenum, dppass: GLenum) {
6175
6176
6177            #[cfg(feature = "debug")] { _gl_print_debug("glStencilOp"); }
6178            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6179
6180            if self.glStencilOp == ptr::null_mut() {
6181                _gl_impl_panic("glStencilOp");
6182                return;
6183            }
6184
6185            unsafe {
6186                let func: extern "system" fn(GLenum, GLenum, GLenum) = mem::transmute(self.glStencilOp);
6187                (func)(sfail, dpfail, dppass)
6188            }
6189        }
6190
6191        $( $opt )? fn stencil_op_separate(&self, face: GLenum, sfail: GLenum, dpfail: GLenum, dppass: GLenum) {
6192
6193
6194            #[cfg(feature = "debug")] { _gl_print_debug("glStencilOpSeparate"); }
6195            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6196
6197            if self.glStencilOpSeparate == ptr::null_mut() {
6198                _gl_impl_panic("glStencilOpSeparate");
6199                return;
6200            }
6201
6202            unsafe {
6203                let func: extern "system" fn(GLenum, GLenum, GLenum, GLenum) = mem::transmute(self.glStencilOpSeparate);
6204                (func)(face, sfail, dpfail, dppass)
6205            }
6206        }
6207
6208        #[allow(unused_variables)]
6209        $( $opt )? fn egl_image_target_texture2d_oes(&self, target: GLenum, image: GLeglImageOES) {
6210
6211            #[cfg(feature = "debug")] { _gl_print_debug("glEglImageTargetTexture2dOes"); }
6212            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6213
6214            return; // not supported
6215
6216            // if self.glEglImageTargetTexture2dOes == ptr::null_mut() {
6217            //     _gl_impl_panic("glEglImageTargetTexture2dOes");
6218            //     return;
6219            // }
6220        }
6221
6222        #[allow(unused_variables)]
6223        $( $opt )? fn egl_image_target_renderbuffer_storage_oes(&self, target: GLenum, image: GLeglImageOES) {
6224
6225            #[cfg(feature = "debug")] { _gl_print_debug("glEglImageTargetRenderbufferStorageOes"); }
6226            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6227
6228            return; // not supported
6229
6230            // if self.glEglImageTargetRenderbufferStorageOes == ptr::null_mut() {
6231            //     _gl_impl_panic("glEglImageTargetRenderbufferStorageOes");
6232            //     return;
6233            // }
6234        }
6235
6236        $( $opt )? fn generate_mipmap(&self, target: GLenum) {
6237
6238            #[cfg(feature = "debug")] { _gl_print_debug("glGenerateMipmap"); }
6239            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6240
6241            if self.glGenerateMipmap == ptr::null_mut() {
6242                _gl_impl_panic("glGenerateMipmap");
6243                return;
6244            }
6245
6246            unsafe {
6247                let func: extern "system" fn(GLenum) = mem::transmute(self.glGenerateMipmap);
6248                (func)(target)
6249            }
6250        }
6251
6252        $( $opt )? fn insert_event_marker_ext(&self, message: &str) {
6253
6254
6255            #[cfg(feature = "debug")] { _gl_print_debug("glInsertEventMarkerEXT"); }
6256            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6257
6258            if self.glInsertEventMarkerEXT == ptr::null_mut() {
6259                _gl_impl_panic("glInsertEventMarkerEXT");
6260                return;
6261            }
6262
6263            unsafe {
6264                let func: extern "system" fn(GLsizei, *const GLchar) = mem::transmute(self.glInsertEventMarkerEXT);
6265                (func)(message.len() as GLsizei, message.as_ptr() as *const _);
6266            }
6267        }
6268
6269        $( $opt )? fn push_group_marker_ext(&self, message: &str) {
6270
6271
6272            #[cfg(feature = "debug")] { _gl_print_debug("glPushGroupMarkerEXT"); }
6273            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6274
6275            if self.glPushGroupMarkerEXT == ptr::null_mut() {
6276                _gl_impl_panic("glPushGroupMarkerEXT");
6277                return;
6278            }
6279
6280            unsafe {
6281                let func: extern "system" fn(GLsizei, *const GLchar) = mem::transmute(self.glPushGroupMarkerEXT);
6282                (func)(message.len() as GLsizei, message.as_ptr() as *const _);
6283            }
6284        }
6285
6286        $( $opt )? fn pop_group_marker_ext(&self) {
6287
6288
6289            #[cfg(feature = "debug")] { _gl_print_debug("glPopGroupMarkerEXT"); }
6290            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6291
6292            if self.glPopGroupMarkerEXT == ptr::null_mut() {
6293                _gl_impl_panic("glPopGroupMarkerEXT");
6294                return;
6295            }
6296
6297            unsafe {
6298                let func: extern "system" fn() = mem::transmute(self.glPopGroupMarkerEXT);
6299                (func)();
6300            }
6301        }
6302
6303        $( $opt )? fn debug_message_insert_khr(&self, source: GLenum, type_: GLenum, id: GLuint, severity: GLenum, message: &str) {
6304
6305
6306            #[cfg(feature = "debug")] { _gl_print_debug("glDebugMessageInsertKHR"); }
6307            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6308
6309            if self.glDebugMessageInsertKHR == ptr::null_mut() {
6310                _gl_impl_panic("glDebugMessageInsertKHR");
6311                return;
6312            }
6313
6314            unsafe {
6315                // TODO: correct?
6316                let func: extern "system" fn(GLenum, GLenum, GLuint, GLenum, GLsizei, *const c_char) = mem::transmute(self.glDebugMessageInsertKHR);
6317                (func)(source, type_, id, severity, message.len() as GLsizei, message.as_ptr() as *const _);
6318            }
6319        }
6320
6321        $( $opt )? fn push_debug_group_khr(&self, source: GLenum, id: GLuint, message: &str) {
6322
6323
6324            #[cfg(feature = "debug")] { _gl_print_debug("glPushDebugGroupKHR"); }
6325            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6326
6327            if self.glPushDebugGroupKHR == ptr::null_mut() {
6328                _gl_impl_panic("glPushDebugGroupKHR");
6329                return;
6330            }
6331
6332            unsafe {
6333                let func: extern "system" fn(GLenum, GLuint, GLsizei, *const c_char) = mem::transmute(self.glPushDebugGroupKHR);
6334                (func)(source, id, message.len() as GLsizei, message.as_ptr() as *const _);
6335            }
6336        }
6337
6338        $( $opt )? fn pop_debug_group_khr(&self) {
6339
6340
6341            #[cfg(feature = "debug")] { _gl_print_debug("glPopDebugGroupKHR"); }
6342            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6343
6344            if self.glPopDebugGroupKHR == ptr::null_mut() {
6345                _gl_impl_panic("glPopDebugGroupKHR");
6346                return;
6347            }
6348
6349            unsafe {
6350                let func: extern "system" fn() = mem::transmute(self.glPopDebugGroupKHR);
6351                (func)();
6352            }
6353        }
6354
6355        $( $opt )? fn fence_sync(&self, condition: GLenum, flags: GLbitfield) -> GLsync {
6356
6357
6358            #[cfg(feature = "debug")] { _gl_print_debug("glFenceSync"); }
6359            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6360
6361            if self.glFenceSync == ptr::null_mut() {
6362                _gl_impl_panic("glFenceSync");
6363                return ptr::null_mut();
6364            }
6365
6366            unsafe {
6367                let func: extern "system" fn(GLenum, GLbitfield) -> GLsync = mem::transmute(self.glFenceSync);
6368                (func)(condition, flags) as *const _
6369            }
6370        }
6371
6372        $( $opt )? fn client_wait_sync(&self, sync: GLsync, flags: GLbitfield, timeout: GLuint64) -> GLenum {
6373
6374
6375            #[cfg(feature = "debug")] { _gl_print_debug("glClientWaitSync"); }
6376            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6377
6378            if self.glClientWaitSync == ptr::null_mut() {
6379                _gl_impl_panic("glClientWaitSync");
6380                return 0;
6381            }
6382
6383            unsafe {
6384                let func: extern "system" fn(GLsync, GLbitfield, GLuint64) -> GLenum = mem::transmute(self.glClientWaitSync);
6385                (func)(sync as *const _, flags, timeout)
6386            }
6387        }
6388
6389        $( $opt )? fn wait_sync(&self, sync: GLsync, flags: GLbitfield, timeout: GLuint64) {
6390
6391
6392            #[cfg(feature = "debug")] { _gl_print_debug("glWaitSync"); }
6393            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6394
6395            if self.glWaitSync == ptr::null_mut() {
6396                _gl_impl_panic("glWaitSync");
6397                return;
6398            }
6399
6400            unsafe {
6401                let func: extern "system" fn(GLsync, GLbitfield, GLuint64) = mem::transmute(self.glWaitSync);
6402                (func)(sync as *const _, flags, timeout);
6403            }
6404        }
6405
6406        $( $opt )? fn texture_range_apple(&self, target: GLenum, data: &[u8]) {
6407
6408
6409            #[cfg(feature = "debug")] { _gl_print_debug("glTextureRangeAPPLE"); }
6410            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6411
6412            if self.glTextureRangeAPPLE == ptr::null_mut() {
6413                _gl_impl_panic("glTextureRangeAPPLE");
6414                return;
6415            }
6416
6417            unsafe {
6418                let func: extern "system" fn(GLenum, GLsizei, *const c_void) = mem::transmute(self.glTextureRangeAPPLE);
6419                (func)(
6420                    target,
6421                    data.len() as GLsizei,
6422                    data.as_ptr() as *const c_void,
6423                );
6424            }
6425        }
6426
6427        $( $opt )? fn delete_sync(&self, sync: GLsync) {
6428
6429
6430            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteSync"); }
6431            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6432
6433            if self.glDeleteSync == ptr::null_mut() {
6434                _gl_impl_panic("glDeleteSync");
6435                return;
6436            }
6437
6438            unsafe {
6439                let func: extern "system" fn(GLsync) = mem::transmute(self.glDeleteSync);
6440                (func)(sync as *const _);
6441            }
6442        }
6443
6444        $( $opt )? fn gen_fences_apple(&self, n: GLsizei) -> Vec<GLuint> {
6445
6446            let mut result = vec![0 as GLuint; n as usize];
6447
6448
6449            #[cfg(feature = "debug")] { _gl_print_debug("glGenFencesAPPLE"); }
6450            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6451
6452            if self.glGenFencesAPPLE == ptr::null_mut() {
6453                _gl_impl_panic("glGenFencesAPPLE");
6454                return result;
6455            }
6456
6457            unsafe {
6458                let func: extern "system" fn(GLsizei, *mut GLuint) = mem::transmute(self.glGenFencesAPPLE);
6459                (func)(n, result.as_mut_ptr());
6460            }
6461            result
6462        }
6463
6464        $( $opt )? fn delete_fences_apple(&self, fences: &[GLuint]) {
6465
6466
6467            #[cfg(feature = "debug")] { _gl_print_debug("glDeleteFencesAPPLE"); }
6468            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6469
6470            if self.glDeleteFencesAPPLE == ptr::null_mut() {
6471                _gl_impl_panic("glDeleteFencesAPPLE");
6472                return;
6473            }
6474
6475            unsafe {
6476                let func: extern "system" fn(GLsizei, *const GLuint) = mem::transmute(self.glDeleteFencesAPPLE);
6477                (func)(fences.len() as GLsizei, fences.as_ptr());
6478            }
6479        }
6480
6481        $( $opt )? fn set_fence_apple(&self, fence: GLuint) {
6482
6483
6484            #[cfg(feature = "debug")] { _gl_print_debug("glSetFenceAPPLE"); }
6485            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6486
6487            if self.glSetFenceAPPLE == ptr::null_mut() {
6488                _gl_impl_panic("glSetFenceAPPLE");
6489                return;
6490            }
6491
6492            unsafe {
6493                let func: extern "system" fn(GLuint) = mem::transmute(self.glSetFenceAPPLE);
6494                (func)(fence);
6495            }
6496        }
6497
6498        $( $opt )? fn finish_fence_apple(&self, fence: GLuint) {
6499
6500
6501            #[cfg(feature = "debug")] { _gl_print_debug("glFinishFenceAPPLE"); }
6502            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6503
6504            if self.glFinishFenceAPPLE == ptr::null_mut() {
6505                _gl_impl_panic("glFinishFenceAPPLE");
6506                return;
6507            }
6508
6509            unsafe {
6510                let func: extern "system" fn(GLuint) = mem::transmute(self.glFinishFenceAPPLE);
6511                (func)(fence);
6512            }
6513        }
6514
6515        $( $opt )? fn test_fence_apple(&self, fence: GLuint) {
6516
6517
6518            #[cfg(feature = "debug")] { _gl_print_debug("glTestFenceAPPLE"); }
6519            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6520
6521            if self.glTestFenceAPPLE == ptr::null_mut() {
6522                _gl_impl_panic("glTestFenceAPPLE");
6523                return;
6524            }
6525
6526            unsafe {
6527                let func: extern "system" fn(GLuint) = mem::transmute(self.glTestFenceAPPLE);
6528                (func)(fence);
6529            }
6530        }
6531
6532        $( $opt )? fn test_object_apple(&self, object: GLenum, name: GLuint) -> GLboolean {
6533
6534
6535            #[cfg(feature = "debug")] { _gl_print_debug("glTestObjectAPPLE"); }
6536            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6537
6538            if self.glTestObjectAPPLE == ptr::null_mut() {
6539                _gl_impl_panic("glTestObjectAPPLE");
6540                return 0;
6541            }
6542
6543            unsafe {
6544                let func: extern "system" fn(GLenum, GLuint) -> GLboolean = mem::transmute(self.glTestObjectAPPLE);
6545                (func)(object, name)
6546            }
6547        }
6548
6549        $( $opt )? fn finish_object_apple(&self, object: GLenum, name: GLuint) {
6550
6551
6552            #[cfg(feature = "debug")] { _gl_print_debug("glFinishObjectAPPLE"); }
6553            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6554
6555            if self.glTestObjectAPPLE == ptr::null_mut() {
6556                _gl_impl_panic("glFinishObjectAPPLE");
6557                return;
6558            }
6559
6560            unsafe {
6561                // the spec has a typo for name as GLint instead of GLuint
6562                let func: extern "system" fn(GLenum, GLint) = mem::transmute(self.glFinishObjectAPPLE);
6563                (func)(object, name as GLint);
6564            }
6565        }
6566
6567        // GL_ARB_blend_func_extended
6568        $( $opt )? fn bind_frag_data_location_indexed(
6569            &self,
6570            program: GLuint,
6571            color_number: GLuint,
6572            index: GLuint,
6573            name: &str,
6574        ) {
6575
6576            #[cfg(feature = "debug")] { _gl_print_debug("glBindFragDataLocationIndexed"); }
6577            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6578
6579            if self.glBindFragDataLocationIndexed == ptr::null_mut() {
6580                _gl_impl_panic("glBindFragDataLocationIndexed");
6581                return;
6582            }
6583
6584            let c_string = encode_ascii(name);
6585
6586            unsafe {
6587                let func: extern "system" fn(GLuint, GLuint, GLuint, *const c_char) = mem::transmute(self.glBindFragDataLocationIndexed);
6588                (func)(
6589                    program,
6590                    color_number,
6591                    index,
6592                    c_string.as_ptr(),
6593                )
6594            }
6595        }
6596
6597        $( $opt )? fn get_frag_data_index(&self, program: GLuint, name: &str) -> GLint {
6598
6599
6600            #[cfg(feature = "debug")] { _gl_print_debug("glGetFragDataIndex"); }
6601            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6602
6603            if self.glGetFragDataIndex == ptr::null_mut() {
6604                _gl_impl_panic("glGetFragDataIndex");
6605                return -1;
6606            }
6607
6608            let c_string = encode_ascii(name);
6609
6610            unsafe {
6611                let func: extern "system" fn(GLuint, *const c_char) -> GLint = mem::transmute(self.glGetFragDataIndex);
6612                (func)(program, c_string.as_ptr())
6613            }
6614        }
6615
6616        // GL_KHR_debug
6617        $( $opt )? fn get_debug_messages(&self) -> Vec<DebugMessage> {
6618
6619
6620            #[cfg(feature = "debug")] { _gl_print_debug("glGetDebugMessageLog"); }
6621            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6622
6623            if self.glGetDebugMessageLog == ptr::null_mut() {
6624                _gl_impl_panic("glGetDebugMessageLog");
6625                return Vec::new();
6626            }
6627
6628            let mut max_message_len = [0];
6629            unsafe {
6630                self.get_integer_v(gl::MAX_DEBUG_MESSAGE_LENGTH, &mut max_message_len[..])
6631            }
6632
6633            let mut output = Vec::new();
6634            const CAPACITY: usize = 4;
6635
6636            let mut msg_data = vec![0u8; CAPACITY * max_message_len[0] as usize];
6637            let mut sources = [0 as GLenum; CAPACITY];
6638            let mut types = [0 as GLenum; CAPACITY];
6639            let mut severities = [0 as GLenum; CAPACITY];
6640            let mut ids = [0 as GLuint; CAPACITY];
6641            let mut lengths = [0 as GLsizei; CAPACITY];
6642
6643            loop {
6644                let count = unsafe {
6645                    let func: extern "system" fn(GLuint, GLsizei, *mut GLenum, *mut GLenum, *mut GLuint, *mut GLenum, *mut GLsizei, *mut GLchar) -> GLuint = mem::transmute(self.glGetDebugMessageLog);
6646                    (func)(
6647                        CAPACITY as _,
6648                        msg_data.len() as _,
6649                        sources.as_mut_ptr(),
6650                        types.as_mut_ptr(),
6651                        ids.as_mut_ptr(),
6652                        severities.as_mut_ptr(),
6653                        lengths.as_mut_ptr(),
6654                        msg_data.as_mut_ptr() as *mut _,
6655                    )
6656                };
6657
6658                let mut offset = 0;
6659                output.extend((0..count as usize).map(|i| {
6660                    let len = lengths[i] as usize;
6661                    let slice = &msg_data[offset..offset + len];
6662                    offset += len;
6663                    DebugMessage {
6664                        message: String::from_utf8_lossy(slice).to_string(),
6665                        source: sources[i],
6666                        ty: types[i],
6667                        id: ids[i],
6668                        severity: severities[i],
6669                    }
6670                }));
6671
6672                if (count as usize) < CAPACITY {
6673                    return output;
6674                }
6675            }
6676        }
6677
6678        $( $opt )? fn provoking_vertex_angle(&self, _mode: GLenum) {
6679
6680            #[cfg(feature = "debug")] { _gl_print_debug("glProvokingVertexAngle"); }
6681            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6682
6683            _gl_impl_panic("glProvokingVertexAngle"); // GLES only
6684            return;
6685        }
6686
6687        // GL_KHR_blend_equation_advanced
6688        $( $opt )? fn blend_barrier_khr(&self) {
6689
6690
6691            #[cfg(feature = "debug")] { _gl_print_debug("glBlendBarrierKHR"); }
6692            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6693
6694            if self.glBlendBarrierKHR == ptr::null_mut() {
6695                _gl_impl_panic("glBlendBarrierKHR");
6696                return;
6697            }
6698
6699            unsafe {
6700                let func: extern "system" fn() = mem::transmute(self.glBlendBarrierKHR);
6701                (func)();
6702            }
6703        }
6704
6705        // GL_CHROMIUM_copy_texture
6706        $( $opt )? fn copy_texture_chromium(&self,
6707            _source_id: GLuint, _source_level: GLint,
6708            _dest_target: GLenum, _dest_id: GLuint, _dest_level: GLint,
6709            _internal_format: GLint, _dest_type: GLenum,
6710            _unpack_flip_y: GLboolean, _unpack_premultiply_alpha: GLboolean, _unpack_unmultiply_alpha: GLboolean)
6711        {
6712            #[cfg(feature = "debug")] { _gl_print_debug("glCopyTextureChromium"); }
6713            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6714
6715            _gl_impl_panic("glCopyTextureChromium"); // GLES only
6716            return;
6717        }
6718        $( $opt )? fn copy_sub_texture_chromium(&self,
6719            _source_id: GLuint, _source_level: GLint,
6720            _dest_target: GLenum, _dest_id: GLuint, _dest_level: GLint,
6721            _x_offset: GLint, _y_offset: GLint, _x: GLint, _y: GLint, _width: GLsizei, _height: GLsizei,
6722            _unpack_flip_y: GLboolean, _unpack_premultiply_alpha: GLboolean, _unpack_unmultiply_alpha: GLboolean)
6723        {
6724            #[cfg(feature = "debug")] { _gl_print_debug("glCopySubTextureChromium"); }
6725            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6726
6727            _gl_impl_panic("glCopySubTextureChromium"); // GLES only
6728            return;
6729        }
6730
6731        // GL_ANGLE_copy_texture_3d
6732        $( $opt )? fn copy_texture_3d_angle(
6733            &self,
6734            _source_id: GLuint,
6735            _source_level: GLint,
6736            _dest_target: GLenum,
6737            _dest_id: GLuint,
6738            _dest_level: GLint,
6739            _internal_format: GLint,
6740            _dest_type: GLenum,
6741            _unpack_flip_y: GLboolean,
6742            _unpack_premultiply_alpha: GLboolean,
6743            _unpack_unmultiply_alpha: GLboolean,
6744        ) {
6745
6746            #[cfg(feature = "debug")] { _gl_print_debug("glANGLECopyTexture3D"); }
6747            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6748            _gl_impl_panic("glANGLECopyTexture3D"); // ANGLE only
6749            return;
6750        }
6751
6752        $( $opt )? fn copy_sub_texture_3d_angle(
6753            &self,
6754            _source_id: GLuint,
6755            _source_level: GLint,
6756            _dest_target: GLenum,
6757            _dest_id: GLuint,
6758            _dest_level: GLint,
6759            _x_offset: GLint,
6760            _y_offset: GLint,
6761            _z_offset: GLint,
6762            _x: GLint,
6763            _y: GLint,
6764            _z: GLint,
6765            _width: GLsizei,
6766            _height: GLsizei,
6767            _depth: GLsizei,
6768            _unpack_flip_y: GLboolean,
6769            _unpack_premultiply_alpha: GLboolean,
6770            _unpack_unmultiply_alpha: GLboolean,
6771        ) {
6772
6773            #[cfg(feature = "debug")] { _gl_print_debug("glANGLECopySubTexture3D"); }
6774            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6775
6776            _gl_impl_panic("glANGLECopySubTexture3D"); // ANGLE only
6777            // return;
6778        }
6779
6780        $( $opt )? fn buffer_storage(
6781            &self,
6782            target: GLenum,
6783            size: GLsizeiptr,
6784            data: *const GLvoid,
6785            flags: GLbitfield,
6786        ) {
6787
6788            #[cfg(feature = "debug")] { _gl_print_debug("glBufferStorage"); }
6789            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6790
6791            if self.glBufferStorage == ptr::null_mut() {
6792                _gl_impl_panic("glBufferStorage");
6793                return;
6794            }
6795
6796            unsafe {
6797                let func: extern "system" fn(GLenum, GLsizeiptr, *const GLvoid, GLbitfield) = mem::transmute(self.glBufferStorage);
6798                (func)(target, size, data, flags);
6799            }
6800        }
6801
6802        $( $opt )? fn flush_mapped_buffer_range(&self, target: GLenum, offset: GLintptr, length: GLsizeiptr) {
6803
6804
6805            #[cfg(feature = "debug")] { _gl_print_debug("glFlushMappedBufferRange"); }
6806            #[cfg(feature = "error")] { _gl_check_for_last_error(self); }
6807
6808            if self.glFlushMappedBufferRange == ptr::null_mut() {
6809                _gl_impl_panic("glFlushMappedBufferRange");
6810                return;
6811            }
6812
6813            unsafe {
6814                let func: extern "system" fn(GLenum, GLintptr, GLsizeiptr) = mem::transmute(self.glFlushMappedBufferRange);
6815                (func)(target, offset, length);
6816            }
6817        }
6818    };
6819}
6820
6821#[cfg(feature = "gleam_trait")]
6822impl gleam::gl::Gl for GenericGlContext {
6823    impl_gl_context!();
6824}
6825
6826#[cfg(not(feature = "gleam_trait"))]
6827#[allow(dead_code)]
6828impl GenericGlContext {
6829    impl_gl_context!(pub);
6830}
6831
6832
6833#[cfg(feature = "std")]
6834fn _gl_impl_panic(s: &str) { println!("OpenGL function not loaded: {}", s); }
6835
6836#[cfg(not(feature = "std"))]
6837#[inline(always)]
6838fn _gl_impl_panic(_s: &str) {  }
6839
6840#[cfg(feature = "debug")]
6841fn _gl_print_debug(s: &str) { println!("Called OpenGL function: {}", s); }
6842
6843#[cfg(feature = "error")]
6844fn _gl_check_for_last_error(gl: &GenericGlContext) {
6845    // if more than 20 errors occur at once, this likely indicates an infinite loop
6846    let mut error_count = 20;
6847    let mut last = gl.get_error();
6848    while last != gl::NO_ERROR && error_count > 0 {
6849        let e_string = match last {
6850            gl::INVALID_ENUM => "INVALID_ENUM".to_string(),
6851            gl::INVALID_VALUE => "INVALID_VALUE".to_string(),
6852            gl::INVALID_OPERATION => "INVALID_OPERATION".to_string(),
6853            gl::INVALID_FRAMEBUFFER_OPERATION => "INVALID_FRAMEBUFFER_OPERATION".to_string(),
6854            gl::OUT_OF_MEMORY => "OUT_OF_MEMORY".to_string(),
6855            gl::STACK_UNDERFLOW => "STACK_UNDERFLOW".to_string(),
6856            gl::STACK_OVERFLOW => "STACK_OVERFLOW".to_string(),
6857            _ => format!("Unknown error: {:0x}", last),
6858        };
6859
6860        println!("OPENGL ERROR OCCURRED: {}", e_string);
6861        last = gl.get_error();
6862        error_count -= 1;
6863    }
6864}