2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2009 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
30 * Texel fetch/store functions
32 * \author Gareth Hughes
36 #include "main/errors.h"
37 #include "main/macros.h"
38 #include "main/texcompress.h"
39 #include "main/texcompress_fxt1.h"
40 #include "main/texcompress_s3tc.h"
41 #include "main/texcompress_rgtc.h"
42 #include "main/texcompress_etc.h"
43 #include "main/teximage.h"
44 #include "main/samplerobj.h"
45 #include "s_context.h"
46 #include "s_texfetch.h"
47 #include "util/format_rgb9e5.h"
48 #include "util/format_r11g11b10f.h"
49 #include "util/format_srgb.h"
52 /* Texel fetch routines for all supported formats
55 #include "s_texfetch_tmp.h"
58 #include "s_texfetch_tmp.h"
61 #include "s_texfetch_tmp.h"
65 * All compressed texture texel fetching is done though this function.
66 * Basically just call a core-Mesa texel fetch function.
69 fetch_compressed(const struct swrast_texture_image
*swImage
,
70 GLint i
, GLint j
, GLint k
, GLfloat
*texel
)
72 /* The FetchCompressedTexel function takes an integer pixel rowstride,
73 * while the image's rowstride is bytes per row of blocks.
76 GLuint texelBytes
= _mesa_get_format_bytes(swImage
->Base
.TexFormat
);
77 _mesa_get_format_block_size(swImage
->Base
.TexFormat
, &bw
, &bh
);
78 assert(swImage
->RowStride
* bw
% texelBytes
== 0);
80 swImage
->FetchCompressedTexel(swImage
->ImageSlices
[k
],
81 swImage
->RowStride
* bw
/ texelBytes
,
88 * Null texel fetch function.
90 * Have to have this so the FetchTexel function pointer is never NULL.
92 static void fetch_null_texelf( const struct swrast_texture_image
*texImage
,
93 GLint i
, GLint j
, GLint k
, GLfloat
*texel
)
95 (void) texImage
; (void) i
; (void) j
; (void) k
;
100 _mesa_warning(NULL
, "fetch_null_texelf() called!");
104 #define FETCH_FUNCS(NAME) \
105 [MESA_FORMAT_ ## NAME] = { \
106 fetch_texel_1d_ ## NAME, \
107 fetch_texel_2d_ ## NAME, \
108 fetch_texel_3d_ ## NAME, \
111 #define FETCH_COMPRESSED(NAME) \
112 [MESA_FORMAT_ ## NAME] = { \
119 * Table to map MESA_FORMAT_ to texel fetch/store funcs.
122 FetchTexelFunc Fetch1D
;
123 FetchTexelFunc Fetch2D
;
124 FetchTexelFunc Fetch3D
;
128 /* Packed unorm formats */
129 FETCH_FUNCS(A8B8G8R8_UNORM
),
130 FETCH_FUNCS(X8B8G8R8_UNORM
),
131 FETCH_FUNCS(R8G8B8A8_UNORM
),
132 FETCH_FUNCS(R8G8B8X8_UNORM
),
133 FETCH_FUNCS(B8G8R8A8_UNORM
),
134 FETCH_FUNCS(B8G8R8X8_UNORM
),
135 FETCH_FUNCS(A8R8G8B8_UNORM
),
136 FETCH_FUNCS(X8R8G8B8_UNORM
),
137 FETCH_FUNCS(B5G6R5_UNORM
),
138 FETCH_FUNCS(R5G6B5_UNORM
),
139 FETCH_FUNCS(B4G4R4A4_UNORM
),
140 FETCH_FUNCS(A4R4G4B4_UNORM
),
141 FETCH_FUNCS(A1B5G5R5_UNORM
),
142 FETCH_FUNCS(B5G5R5A1_UNORM
),
143 FETCH_FUNCS(A1R5G5B5_UNORM
),
144 FETCH_FUNCS(L4A4_UNORM
),
145 FETCH_FUNCS(B2G3R3_UNORM
),
146 FETCH_FUNCS(B10G10R10A2_UNORM
),
147 FETCH_FUNCS(R10G10B10A2_UNORM
),
149 FETCH_FUNCS(S8_UINT_Z24_UNORM
),
150 [MESA_FORMAT_X8_UINT_Z24_UNORM
] = {
151 fetch_texel_1d_S8_UINT_Z24_UNORM
,
152 fetch_texel_2d_S8_UINT_Z24_UNORM
,
153 fetch_texel_3d_S8_UINT_Z24_UNORM
155 FETCH_FUNCS(Z24_UNORM_S8_UINT
),
156 [MESA_FORMAT_Z24_UNORM_X8_UINT
] = {
157 fetch_texel_1d_Z24_UNORM_S8_UINT
,
158 fetch_texel_2d_Z24_UNORM_S8_UINT
,
159 fetch_texel_3d_Z24_UNORM_S8_UINT
163 FETCH_FUNCS(YCBCR_REV
),
165 /* Array unorm formats */
166 FETCH_FUNCS(A_UNORM8
),
167 FETCH_FUNCS(A_UNORM16
),
168 FETCH_FUNCS(L_UNORM8
),
169 FETCH_FUNCS(L_UNORM16
),
170 FETCH_FUNCS(LA_UNORM8
),
171 FETCH_FUNCS(LA_UNORM16
),
172 FETCH_FUNCS(I_UNORM8
),
173 FETCH_FUNCS(I_UNORM16
),
174 FETCH_FUNCS(R_UNORM8
),
175 FETCH_FUNCS(R_UNORM16
),
176 FETCH_FUNCS(RG_UNORM8
),
177 FETCH_FUNCS(RG_UNORM16
),
178 FETCH_FUNCS(BGR_UNORM8
),
179 FETCH_FUNCS(RGB_UNORM8
),
180 FETCH_FUNCS(RGBA_UNORM16
),
181 FETCH_FUNCS(RGBX_UNORM16
),
182 FETCH_FUNCS(Z_UNORM16
),
183 FETCH_FUNCS(Z_UNORM32
),
185 /* Packed signed/normalized formats */
186 FETCH_FUNCS(A8B8G8R8_SNORM
),
187 FETCH_FUNCS(X8B8G8R8_SNORM
),
188 FETCH_FUNCS(R8G8B8A8_SNORM
),
190 /* Array signed/normalized formats */
191 FETCH_FUNCS(A_SNORM8
),
192 FETCH_FUNCS(A_SNORM16
),
193 FETCH_FUNCS(L_SNORM8
),
194 FETCH_FUNCS(L_SNORM16
),
195 FETCH_FUNCS(LA_SNORM8
),
196 FETCH_FUNCS(LA_SNORM16
),
197 FETCH_FUNCS(I_SNORM8
),
198 FETCH_FUNCS(I_SNORM16
),
199 FETCH_FUNCS(R_SNORM8
),
200 FETCH_FUNCS(R_SNORM16
),
201 FETCH_FUNCS(RG_SNORM8
),
202 FETCH_FUNCS(RG_SNORM16
),
203 FETCH_FUNCS(RGB_SNORM16
),
204 FETCH_FUNCS(RGBA_SNORM16
),
206 /* Packed sRGB formats */
207 FETCH_FUNCS(A8B8G8R8_SRGB
),
208 FETCH_FUNCS(B8G8R8A8_SRGB
),
209 FETCH_FUNCS(A8R8G8B8_SRGB
),
210 FETCH_FUNCS(R8G8B8A8_SRGB
),
211 FETCH_FUNCS(R8G8B8X8_SRGB
),
212 FETCH_FUNCS(X8B8G8R8_SRGB
),
214 /* Array sRGB formats */
215 FETCH_FUNCS(R_SRGB8
),
216 FETCH_FUNCS(L_SRGB8
),
217 FETCH_FUNCS(LA_SRGB8
),
218 FETCH_FUNCS(BGR_SRGB8
),
220 /* Packed float formats */
221 FETCH_FUNCS(R9G9B9E5_FLOAT
),
222 FETCH_FUNCS(R11G11B10_FLOAT
),
223 FETCH_FUNCS(Z32_FLOAT_S8X24_UINT
),
225 /* Array float formats */
226 FETCH_FUNCS(A_FLOAT16
),
227 FETCH_FUNCS(A_FLOAT32
),
228 FETCH_FUNCS(L_FLOAT16
),
229 FETCH_FUNCS(L_FLOAT32
),
230 FETCH_FUNCS(LA_FLOAT16
),
231 FETCH_FUNCS(LA_FLOAT32
),
232 FETCH_FUNCS(I_FLOAT16
),
233 FETCH_FUNCS(I_FLOAT32
),
234 FETCH_FUNCS(R_FLOAT16
),
235 FETCH_FUNCS(R_FLOAT32
),
236 FETCH_FUNCS(RG_FLOAT16
),
237 FETCH_FUNCS(RG_FLOAT32
),
238 FETCH_FUNCS(RGB_FLOAT16
),
239 FETCH_FUNCS(RGB_FLOAT32
),
240 FETCH_FUNCS(RGBA_FLOAT16
),
241 FETCH_FUNCS(RGBA_FLOAT32
),
242 FETCH_FUNCS(RGBX_FLOAT16
),
243 FETCH_FUNCS(RGBX_FLOAT32
),
244 [MESA_FORMAT_Z_FLOAT32
] = {
245 fetch_texel_1d_R_FLOAT32
, /* Reuse the R32F functions. */
246 fetch_texel_2d_R_FLOAT32
,
247 fetch_texel_3d_R_FLOAT32
250 /* Packed signed/unsigned non-normalized integer formats */
252 /* Array signed/unsigned non-normalized integer formats */
253 FETCH_FUNCS(RGBA_UINT16
),
254 FETCH_FUNCS(RGBA_UINT32
),
255 FETCH_FUNCS(RGBA_SINT8
),
256 FETCH_FUNCS(RGBA_SINT16
),
257 FETCH_FUNCS(RGBA_SINT32
),
259 /* DXT compressed formats */
260 FETCH_COMPRESSED(RGB_DXT1
),
261 FETCH_COMPRESSED(RGBA_DXT1
),
262 FETCH_COMPRESSED(RGBA_DXT3
),
263 FETCH_COMPRESSED(RGBA_DXT5
),
265 /* DXT sRGB compressed formats */
266 FETCH_COMPRESSED(SRGB_DXT1
),
267 FETCH_COMPRESSED(SRGBA_DXT1
),
268 FETCH_COMPRESSED(SRGBA_DXT3
),
269 FETCH_COMPRESSED(SRGBA_DXT5
),
271 /* FXT1 compressed formats */
272 FETCH_COMPRESSED(RGB_FXT1
),
273 FETCH_COMPRESSED(RGBA_FXT1
),
275 /* RGTC compressed formats */
276 FETCH_COMPRESSED(R_RGTC1_UNORM
),
277 FETCH_COMPRESSED(R_RGTC1_SNORM
),
278 FETCH_COMPRESSED(RG_RGTC2_UNORM
),
279 FETCH_COMPRESSED(RG_RGTC2_SNORM
),
281 /* LATC1/2 compressed formats */
282 FETCH_COMPRESSED(L_LATC1_UNORM
),
283 FETCH_COMPRESSED(L_LATC1_SNORM
),
284 FETCH_COMPRESSED(LA_LATC2_UNORM
),
285 FETCH_COMPRESSED(LA_LATC2_SNORM
),
287 /* ETC1/2 compressed formats */
288 FETCH_COMPRESSED(ETC1_RGB8
),
289 FETCH_COMPRESSED(ETC2_RGB8
),
290 FETCH_COMPRESSED(ETC2_SRGB8
),
291 FETCH_COMPRESSED(ETC2_RGBA8_EAC
),
292 FETCH_COMPRESSED(ETC2_SRGB8_ALPHA8_EAC
),
293 FETCH_COMPRESSED(ETC2_R11_EAC
),
294 FETCH_COMPRESSED(ETC2_RG11_EAC
),
295 FETCH_COMPRESSED(ETC2_SIGNED_R11_EAC
),
296 FETCH_COMPRESSED(ETC2_SIGNED_RG11_EAC
),
297 FETCH_COMPRESSED(ETC2_RGB8_PUNCHTHROUGH_ALPHA1
),
298 FETCH_COMPRESSED(ETC2_SRGB8_PUNCHTHROUGH_ALPHA1
),
299 FETCH_COMPRESSED(BPTC_RGBA_UNORM
),
300 FETCH_COMPRESSED(BPTC_SRGB_ALPHA_UNORM
),
301 FETCH_COMPRESSED(BPTC_RGB_SIGNED_FLOAT
),
302 FETCH_COMPRESSED(BPTC_RGB_UNSIGNED_FLOAT
),
307 * Initialize the texture image's FetchTexel methods.
310 set_fetch_functions(const struct gl_sampler_object
*samp
,
311 struct swrast_texture_image
*texImage
, GLuint dims
)
313 mesa_format format
= texImage
->Base
.TexFormat
;
315 if (samp
->sRGBDecode
== GL_SKIP_DECODE_EXT
)
316 format
= _mesa_get_srgb_format_linear(format
);
318 texImage
->FetchTexel
= NULL
;
320 if (format
< ARRAY_SIZE(texfetch_funcs
)) {
323 texImage
->FetchTexel
= texfetch_funcs
[format
].Fetch1D
;
326 texImage
->FetchTexel
= texfetch_funcs
[format
].Fetch2D
;
329 texImage
->FetchTexel
= texfetch_funcs
[format
].Fetch3D
;
332 assert(!"Bad dims in set_fetch_functions()");
336 if (!texImage
->FetchTexel
)
337 texImage
->FetchTexel
= fetch_null_texelf
;
339 texImage
->FetchCompressedTexel
= _mesa_get_compressed_fetch_func(format
);
341 assert(texImage
->FetchTexel
);
345 _mesa_update_fetch_functions(struct gl_context
*ctx
, GLuint unit
)
347 struct gl_texture_object
*texObj
= ctx
->Texture
.Unit
[unit
]._Current
;
348 struct gl_sampler_object
*samp
;
355 samp
= _mesa_get_samplerobj(ctx
, unit
);
357 dims
= _mesa_get_texture_dimensions(texObj
->Target
);
359 for (face
= 0; face
< 6; face
++) {
360 for (i
= 0; i
< MAX_TEXTURE_LEVELS
; i
++) {
361 if (texObj
->Image
[face
][i
]) {
362 set_fetch_functions(samp
,
363 swrast_texture_image(texObj
->Image
[face
][i
]),