2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (c) 2008-2009 VMware, Inc.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 * \author Gareth Hughes
37 #include "texcompress.h"
38 #include "texformat.h"
42 * Choose an appropriate texture format given the format, type and
43 * internalFormat parameters passed to glTexImage().
45 * \param ctx the GL context.
46 * \param internalFormat user's prefered internal texture format.
47 * \param format incoming image pixel format.
48 * \param type incoming image data type.
50 * \return a pointer to a gl_texture_format object which describes the
51 * choosen texture format, or NULL on failure.
53 * This is called via dd_function_table::ChooseTextureFormat. Hardware drivers
54 * will typically override this function with a specialized version.
57 _mesa_choose_tex_format( GLcontext
*ctx
, GLint internalFormat
,
58 GLenum format
, GLenum type
)
63 switch (internalFormat
) {
64 /* shallow RGBA formats */
68 return MESA_FORMAT_RGBA8888
;
70 return MESA_FORMAT_ARGB1555
;
72 return MESA_FORMAT_ARGB4444_REV
; /* just to test another format*/
74 return MESA_FORMAT_ARGB4444
;
76 /* deep RGBA formats */
80 return MESA_FORMAT_RGBA_16
;
82 /* shallow RGB formats */
86 return MESA_FORMAT_RGB888
;
88 return MESA_FORMAT_RGB332
;
90 return MESA_FORMAT_RGB565_REV
; /* just to test another format */
92 return MESA_FORMAT_RGB565
;
94 /* deep RGB formats */
98 return MESA_FORMAT_RGBA_16
;
106 return MESA_FORMAT_A8
;
108 /* Luminance formats */
115 return MESA_FORMAT_L8
;
117 /* Luminance/Alpha formats */
119 case GL_LUMINANCE_ALPHA
:
120 case GL_LUMINANCE4_ALPHA4
:
121 case GL_LUMINANCE6_ALPHA2
:
122 case GL_LUMINANCE8_ALPHA8
:
123 return MESA_FORMAT_AL88
;
125 case GL_LUMINANCE12_ALPHA4
:
126 case GL_LUMINANCE12_ALPHA12
:
127 case GL_LUMINANCE16_ALPHA16
:
128 return MESA_FORMAT_AL1616
;
135 return MESA_FORMAT_I8
;
138 case GL_COLOR_INDEX1_EXT
:
139 case GL_COLOR_INDEX2_EXT
:
140 case GL_COLOR_INDEX4_EXT
:
141 case GL_COLOR_INDEX12_EXT
:
142 case GL_COLOR_INDEX16_EXT
:
143 case GL_COLOR_INDEX8_EXT
:
144 return MESA_FORMAT_CI8
;
150 if (ctx
->Extensions
.ARB_depth_texture
) {
151 switch (internalFormat
) {
152 case GL_DEPTH_COMPONENT
:
153 case GL_DEPTH_COMPONENT24
:
154 case GL_DEPTH_COMPONENT32
:
155 return MESA_FORMAT_Z32
;
156 case GL_DEPTH_COMPONENT16
:
157 return MESA_FORMAT_Z16
;
163 switch (internalFormat
) {
164 case GL_COMPRESSED_ALPHA_ARB
:
165 return MESA_FORMAT_A8
;
166 case GL_COMPRESSED_LUMINANCE_ARB
:
167 return MESA_FORMAT_L8
;
168 case GL_COMPRESSED_LUMINANCE_ALPHA_ARB
:
169 return MESA_FORMAT_AL88
;
170 case GL_COMPRESSED_INTENSITY_ARB
:
171 return MESA_FORMAT_I8
;
172 case GL_COMPRESSED_RGB_ARB
:
173 if (ctx
->Extensions
.EXT_texture_compression_s3tc
||
174 ctx
->Extensions
.S3_s3tc
)
175 return MESA_FORMAT_RGB_DXT1
;
176 if (ctx
->Extensions
.TDFX_texture_compression_FXT1
)
177 return MESA_FORMAT_RGB_FXT1
;
178 return MESA_FORMAT_RGB888
;
179 case GL_COMPRESSED_RGBA_ARB
:
180 if (ctx
->Extensions
.EXT_texture_compression_s3tc
||
181 ctx
->Extensions
.S3_s3tc
)
182 return MESA_FORMAT_RGBA_DXT3
; /* Not rgba_dxt1, see spec */
183 if (ctx
->Extensions
.TDFX_texture_compression_FXT1
)
184 return MESA_FORMAT_RGBA_FXT1
;
185 return MESA_FORMAT_RGBA8888
;
190 if (ctx
->Extensions
.MESA_ycbcr_texture
) {
191 if (internalFormat
== GL_YCBCR_MESA
) {
192 if (type
== GL_UNSIGNED_SHORT_8_8_MESA
)
193 return MESA_FORMAT_YCBCR
;
195 return MESA_FORMAT_YCBCR_REV
;
199 #if FEATURE_texture_fxt1
200 if (ctx
->Extensions
.TDFX_texture_compression_FXT1
) {
201 switch (internalFormat
) {
202 case GL_COMPRESSED_RGB_FXT1_3DFX
:
203 return MESA_FORMAT_RGB_FXT1
;
204 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
205 return MESA_FORMAT_RGBA_FXT1
;
212 #if FEATURE_texture_s3tc
213 if (ctx
->Extensions
.EXT_texture_compression_s3tc
) {
214 switch (internalFormat
) {
215 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
216 return MESA_FORMAT_RGB_DXT1
;
217 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
218 return MESA_FORMAT_RGBA_DXT1
;
219 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
220 return MESA_FORMAT_RGBA_DXT3
;
221 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
222 return MESA_FORMAT_RGBA_DXT5
;
228 if (ctx
->Extensions
.S3_s3tc
) {
229 switch (internalFormat
) {
232 return MESA_FORMAT_RGB_DXT1
;
235 return MESA_FORMAT_RGBA_DXT3
;
242 if (ctx
->Extensions
.ARB_texture_float
) {
243 switch (internalFormat
) {
244 case GL_ALPHA16F_ARB
:
245 return MESA_FORMAT_ALPHA_FLOAT16
;
246 case GL_ALPHA32F_ARB
:
247 return MESA_FORMAT_ALPHA_FLOAT32
;
248 case GL_LUMINANCE16F_ARB
:
249 return MESA_FORMAT_LUMINANCE_FLOAT16
;
250 case GL_LUMINANCE32F_ARB
:
251 return MESA_FORMAT_LUMINANCE_FLOAT32
;
252 case GL_LUMINANCE_ALPHA16F_ARB
:
253 return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16
;
254 case GL_LUMINANCE_ALPHA32F_ARB
:
255 return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32
;
256 case GL_INTENSITY16F_ARB
:
257 return MESA_FORMAT_INTENSITY_FLOAT16
;
258 case GL_INTENSITY32F_ARB
:
259 return MESA_FORMAT_INTENSITY_FLOAT32
;
261 return MESA_FORMAT_RGB_FLOAT16
;
263 return MESA_FORMAT_RGB_FLOAT32
;
265 return MESA_FORMAT_RGBA_FLOAT16
;
267 return MESA_FORMAT_RGBA_FLOAT32
;
273 if (ctx
->Extensions
.EXT_packed_depth_stencil
) {
274 switch (internalFormat
) {
275 case GL_DEPTH_STENCIL_EXT
:
276 case GL_DEPTH24_STENCIL8_EXT
:
277 return MESA_FORMAT_Z24_S8
;
283 if (ctx
->Extensions
.ATI_envmap_bumpmap
) {
284 switch (internalFormat
) {
287 return MESA_FORMAT_DUDV8
;
293 if (ctx
->Extensions
.MESA_texture_signed_rgba
) {
294 switch (internalFormat
) {
297 return MESA_FORMAT_SIGNED_RGBA8888
;
303 if (ctx
->VersionMajor
* 10 + ctx
->VersionMinor
>= 31) {
304 switch (internalFormat
) {
307 return MESA_FORMAT_SIGNED_R8
;
310 return MESA_FORMAT_SIGNED_RG88
;
313 return MESA_FORMAT_SIGNED_RGBX8888
;
316 return MESA_FORMAT_SIGNED_RGBA8888
;
318 return MESA_FORMAT_SIGNED_R_16
;
320 return MESA_FORMAT_SIGNED_RG_16
;
322 return MESA_FORMAT_SIGNED_RGB_16
;
323 case GL_RGBA16_SNORM
:
324 return MESA_FORMAT_SIGNED_RGBA_16
;
330 #if FEATURE_EXT_texture_sRGB
331 if (ctx
->Extensions
.EXT_texture_sRGB
) {
332 switch (internalFormat
) {
335 return MESA_FORMAT_SRGB8
;
336 case GL_SRGB_ALPHA_EXT
:
337 case GL_SRGB8_ALPHA8_EXT
:
338 return MESA_FORMAT_SRGBA8
;
339 case GL_SLUMINANCE_EXT
:
340 case GL_SLUMINANCE8_EXT
:
341 return MESA_FORMAT_SL8
;
342 case GL_SLUMINANCE_ALPHA_EXT
:
343 case GL_SLUMINANCE8_ALPHA8_EXT
:
344 return MESA_FORMAT_SLA8
;
345 case GL_COMPRESSED_SLUMINANCE_EXT
:
346 return MESA_FORMAT_SL8
;
347 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
348 return MESA_FORMAT_SLA8
;
349 case GL_COMPRESSED_SRGB_EXT
:
350 #if FEATURE_texture_s3tc
351 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
352 return MESA_FORMAT_SRGB_DXT1
;
354 return MESA_FORMAT_SRGB8
;
355 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
356 #if FEATURE_texture_s3tc
357 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
358 return MESA_FORMAT_SRGBA_DXT3
; /* Not srgba_dxt1, see spec */
360 return MESA_FORMAT_SRGBA8
;
361 #if FEATURE_texture_s3tc
362 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
363 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
364 return MESA_FORMAT_SRGB_DXT1
;
366 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
367 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
368 return MESA_FORMAT_SRGBA_DXT1
;
370 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
371 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
372 return MESA_FORMAT_SRGBA_DXT3
;
374 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
375 if (ctx
->Extensions
.EXT_texture_compression_s3tc
)
376 return MESA_FORMAT_SRGBA_DXT5
;
383 #endif /* FEATURE_EXT_texture_sRGB */
385 if (ctx
->Extensions
.EXT_texture_integer
) {
386 switch (internalFormat
) {
387 case GL_RGBA32UI_EXT
:
389 case GL_ALPHA32UI_EXT
:
390 case GL_INTENSITY32UI_EXT
:
391 case GL_LUMINANCE32UI_EXT
:
392 case GL_LUMINANCE_ALPHA32UI_EXT
:
393 return MESA_FORMAT_RGBA_UINT32
;
394 case GL_RGBA16UI_EXT
:
396 case GL_ALPHA16UI_EXT
:
397 case GL_INTENSITY16UI_EXT
:
398 case GL_LUMINANCE16UI_EXT
:
399 case GL_LUMINANCE_ALPHA16UI_EXT
:
400 return MESA_FORMAT_RGBA_UINT16
;
403 case GL_ALPHA8UI_EXT
:
404 case GL_INTENSITY8UI_EXT
:
405 case GL_LUMINANCE8UI_EXT
:
406 case GL_LUMINANCE_ALPHA8UI_EXT
:
407 return MESA_FORMAT_RGBA_UINT8
;
410 case GL_ALPHA32I_EXT
:
411 case GL_INTENSITY32I_EXT
:
412 case GL_LUMINANCE32I_EXT
:
413 case GL_LUMINANCE_ALPHA32I_EXT
:
414 return MESA_FORMAT_RGBA_INT32
;
417 case GL_ALPHA16I_EXT
:
418 case GL_INTENSITY16I_EXT
:
419 case GL_LUMINANCE16I_EXT
:
420 case GL_LUMINANCE_ALPHA16I_EXT
:
421 return MESA_FORMAT_RGBA_INT16
;
425 case GL_INTENSITY8I_EXT
:
426 case GL_LUMINANCE8I_EXT
:
427 case GL_LUMINANCE_ALPHA8I_EXT
:
428 return MESA_FORMAT_RGBA_INT8
;
432 if (ctx
->Extensions
.ARB_texture_rg
) {
433 switch (internalFormat
) {
436 case GL_COMPRESSED_RED
:
437 return MESA_FORMAT_R8
;
440 return MESA_FORMAT_R16
;
444 case GL_COMPRESSED_RG
:
445 return MESA_FORMAT_RG88
;
448 return MESA_FORMAT_RG1616
;
455 _mesa_problem(ctx
, "unexpected format in _mesa_choose_tex_format()");
456 return MESA_FORMAT_NONE
;