1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
use crate::core::texture::*;
///
/// A 3D color texture.
///
pub struct Texture3D {
context: Context,
id: crate::context::Texture,
width: u32,
height: u32,
depth: u32,
number_of_mip_maps: u32,
data_byte_size: usize,
}
impl Texture3D {
///
/// Construcs a new 3D texture with the given data.
///
/// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
///
pub fn new(context: &Context, cpu_texture: &CpuTexture3D) -> Self {
match cpu_texture.data {
TextureData::RU8(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgU8(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbU8(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbaU8(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RF16(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgF16(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbF16(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbaF16(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RF32(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgF32(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbF32(ref data) => Self::new_with_data(context, cpu_texture, data),
TextureData::RgbaF32(ref data) => Self::new_with_data(context, cpu_texture, data),
}
}
fn new_with_data<T: TextureDataType>(
context: &Context,
cpu_texture: &CpuTexture3D,
data: &[T],
) -> Self {
let texture = Self::new_empty::<T>(
context,
cpu_texture.width,
cpu_texture.height,
cpu_texture.depth,
cpu_texture.min_filter,
cpu_texture.mag_filter,
cpu_texture.mipmap,
cpu_texture.wrap_s,
cpu_texture.wrap_t,
cpu_texture.wrap_r,
);
texture.fill(data);
texture
}
///
/// Creates a new empty 3D color texture.
///
/// **Note:** Mip maps will not be generated for RGB16F and RGB32F format, even if `mip_map_filter` is specified.
///
pub fn new_empty<T: TextureDataType>(
context: &Context,
width: u32,
height: u32,
depth: u32,
min_filter: Interpolation,
mag_filter: Interpolation,
mipmap: Option<Mipmap>,
wrap_s: Wrapping,
wrap_t: Wrapping,
wrap_r: Wrapping,
) -> Self {
unsafe {
Self::new_unchecked::<T>(
context,
width,
height,
depth,
min_filter,
mag_filter,
mipmap,
wrap_s,
wrap_t,
wrap_r,
|texture| {
context.tex_storage_3d(
crate::context::TEXTURE_3D,
texture.number_of_mip_maps() as i32,
T::internal_format(),
width as i32,
height as i32,
depth as i32,
)
},
)
}
}
///
/// Fills this texture with the given data and generate mip maps if specified at construction.
///
/// # Panic
/// Will panic if the length of the data does not correspond to the width, height, depth and format specified at construction.
/// It is therefore necessary to create a new texture if the texture size or format has changed.
///
pub fn fill<T: TextureDataType>(&self, data: &[T]) {
check_data_length::<T>(
self.width,
self.height,
self.depth,
self.data_byte_size,
data.len(),
);
self.bind();
unsafe {
self.context.tex_sub_image_3d(
crate::context::TEXTURE_3D,
0,
0,
0,
0,
self.width as i32,
self.height as i32,
self.depth as i32,
format_from_data_type::<T>(),
T::data_type(),
crate::context::PixelUnpackData::Slice(Some(to_byte_slice(data))),
);
}
self.generate_mip_maps();
}
/// The width of this texture.
pub fn width(&self) -> u32 {
self.width
}
/// The height of this texture.
pub fn height(&self) -> u32 {
self.height
}
/// The depth of this texture.
pub fn depth(&self) -> u32 {
self.depth
}
/// The number of mip maps of this texture.
pub fn number_of_mip_maps(&self) -> u32 {
self.number_of_mip_maps
}
fn generate_mip_maps(&self) {
if self.number_of_mip_maps > 1 {
self.bind();
unsafe {
self.context.generate_mipmap(crate::context::TEXTURE_3D);
}
}
}
pub(in crate::core) fn bind(&self) {
unsafe {
self.context
.bind_texture(crate::context::TEXTURE_3D, Some(self.id));
}
}
///
/// Creates a new texture where it is up to the caller to allocate and transfer data to the GPU
/// using low-level context calls inside the callback.
/// This function binds the texture and sets the parameters before calling the callback and generates mip maps afterwards.
///
/// # Safety
///
/// This function is unsafe and should only be used in special cases,
/// for example when you have an uncommon source of data or the data is in a special format like sRGB.
///
pub unsafe fn new_unchecked<T: TextureDataType>(
context: &Context,
width: u32,
height: u32,
depth: u32,
min_filter: Interpolation,
mag_filter: Interpolation,
mipmap: Option<Mipmap>,
wrap_s: Wrapping,
wrap_t: Wrapping,
wrap_r: Wrapping,
callback: impl FnOnce(&Self),
) -> Self {
let id = generate(context);
let number_of_mip_maps =
calculate_number_of_mip_maps::<T>(mipmap, width, height, Some(depth));
let texture = Self {
context: context.clone(),
id,
width,
height,
depth,
number_of_mip_maps,
data_byte_size: std::mem::size_of::<T>(),
};
texture.bind();
set_parameters(
context,
crate::context::TEXTURE_3D,
min_filter,
mag_filter,
if number_of_mip_maps == 1 {
None
} else {
mipmap
},
wrap_s,
wrap_t,
Some(wrap_r),
);
callback(&texture);
texture.generate_mip_maps();
texture
}
}
impl Drop for Texture3D {
fn drop(&mut self) {
unsafe {
self.context.delete_texture(self.id);
}
}
}