2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008 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.
29 * Helper functions for texture compression.
39 #include "texcompress.h"
40 #include "texcompress_fxt1.h"
41 #include "texcompress_rgtc.h"
42 #include "texcompress_s3tc.h"
43 #include "texcompress_etc.h"
44 #include "texcompress_bptc.h"
48 * Get the GL base format of a specified GL compressed texture format
50 * From page 232 of the OpenGL 3.3 (Compatiblity Profile) spec:
52 * "Compressed Internal Format Base Internal Format Type
53 * --------------------------- -------------------- ---------
54 * COMPRESSED_ALPHA ALPHA Generic
55 * COMPRESSED_LUMINANCE LUMINANCE Generic
56 * COMPRESSED_LUMINANCE_ALPHA LUMINANCE_ALPHA Generic
57 * COMPRESSED_INTENSITY INTENSITY Generic
58 * COMPRESSED_RED RED Generic
59 * COMPRESSED_RG RG Generic
60 * COMPRESSED_RGB RGB Generic
61 * COMPRESSED_RGBA RGBA Generic
62 * COMPRESSED_SRGB RGB Generic
63 * COMPRESSED_SRGB_ALPHA RGBA Generic
64 * COMPRESSED_SLUMINANCE LUMINANCE Generic
65 * COMPRESSED_SLUMINANCE_ALPHA LUMINANCE_ALPHA Generic
66 * COMPRESSED_RED_RGTC1 RED Specific
67 * COMPRESSED_SIGNED_RED_RGTC1 RED Specific
68 * COMPRESSED_RG_RGTC2 RG Specific
69 * COMPRESSED_SIGNED_RG_RGTC2 RG Specific"
72 * The base format of \c format if \c format is a compressed format (either
73 * generic or specific. Otherwise 0 is returned.
76 _mesa_gl_compressed_format_base_format(GLenum format
)
79 case GL_COMPRESSED_RED
:
80 case GL_COMPRESSED_R11_EAC
:
81 case GL_COMPRESSED_RED_RGTC1
:
82 case GL_COMPRESSED_SIGNED_R11_EAC
:
83 case GL_COMPRESSED_SIGNED_RED_RGTC1
:
86 case GL_COMPRESSED_RG
:
87 case GL_COMPRESSED_RG11_EAC
:
88 case GL_COMPRESSED_RG_RGTC2
:
89 case GL_COMPRESSED_SIGNED_RG11_EAC
:
90 case GL_COMPRESSED_SIGNED_RG_RGTC2
:
93 case GL_COMPRESSED_RGB
:
94 case GL_COMPRESSED_SRGB
:
95 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB
:
96 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB
:
97 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
98 case GL_COMPRESSED_RGB_FXT1_3DFX
:
99 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
100 case GL_ETC1_RGB8_OES
:
101 case GL_COMPRESSED_RGB8_ETC2
:
102 case GL_COMPRESSED_SRGB8_ETC2
:
105 case GL_PALETTE4_RGB8_OES
:
106 case GL_PALETTE4_R5_G6_B5_OES
:
107 case GL_PALETTE8_RGB8_OES
:
108 case GL_PALETTE8_R5_G6_B5_OES
:
111 case GL_COMPRESSED_RGBA
:
112 case GL_COMPRESSED_SRGB_ALPHA
:
113 case GL_COMPRESSED_RGBA_BPTC_UNORM_ARB
:
114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB
:
115 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
116 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
117 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
118 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
119 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
120 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
121 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
122 case GL_COMPRESSED_RGBA8_ETC2_EAC
:
123 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
:
124 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
:
125 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
:
128 case GL_PALETTE4_RGBA8_OES
:
129 case GL_PALETTE8_RGB5_A1_OES
:
130 case GL_PALETTE4_RGBA4_OES
:
131 case GL_PALETTE4_RGB5_A1_OES
:
132 case GL_PALETTE8_RGBA8_OES
:
133 case GL_PALETTE8_RGBA4_OES
:
136 case GL_COMPRESSED_ALPHA
:
139 case GL_COMPRESSED_LUMINANCE
:
140 case GL_COMPRESSED_SLUMINANCE
:
141 case GL_COMPRESSED_LUMINANCE_LATC1_EXT
:
142 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT
:
145 case GL_COMPRESSED_LUMINANCE_ALPHA
:
146 case GL_COMPRESSED_SLUMINANCE_ALPHA
:
147 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT
:
148 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT
:
149 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI
:
150 return GL_LUMINANCE_ALPHA
;
152 case GL_COMPRESSED_INTENSITY
:
161 * Return list of (and count of) all specific texture compression
162 * formats that are supported.
164 * Some formats are \b not returned by this function. The
165 * \c GL_COMPRESSED_TEXTURE_FORMATS query only returns formats that are
166 * "suitable for general-purpose usage." All texture compression extensions
167 * have taken this to mean either linear RGB or linear RGBA.
169 * The GL_ARB_texture_compress_rgtc spec says:
171 * "19) Should the GL_NUM_COMPRESSED_TEXTURE_FORMATS and
172 * GL_COMPRESSED_TEXTURE_FORMATS queries return the RGTC formats?
176 * The OpenGL 2.1 specification says "The only values returned
177 * by this query [GL_COMPRESSED_TEXTURE_FORMATS"] are those
178 * corresponding to formats suitable for general-purpose usage.
179 * The renderer will not enumerate formats with restrictions that
180 * need to be specifically understood prior to use."
182 * Compressed textures with just red or red-green components are
183 * not general-purpose so should not be returned by these queries
184 * because they have restrictions.
186 * Applications that seek to use the RGTC formats should do so
187 * by looking for this extension's name in the string returned by
188 * glGetString(GL_EXTENSIONS) rather than
189 * what GL_NUM_COMPRESSED_TEXTURE_FORMATS and
190 * GL_COMPRESSED_TEXTURE_FORMATS return."
192 * There is nearly identical wording in the GL_EXT_texture_compression_rgtc
195 * The GL_EXT_texture_rRGB spec says:
197 * "22) Should the new COMPRESSED_SRGB_* formats be listed in an
198 * implementation's GL_COMPRESSED_TEXTURE_FORMATS list?
200 * RESOLVED: No. Section 3.8.1 says formats listed by
201 * GL_COMPRESSED_TEXTURE_FORMATS are "suitable for general-purpose
202 * usage." The non-linear distribution of red, green, and
203 * blue for these sRGB compressed formats makes them not really
206 * The GL_EXT_texture_compression_latc spec says:
208 * "16) Should the GL_NUM_COMPRESSED_TEXTURE_FORMATS and
209 * GL_COMPRESSED_TEXTURE_FORMATS queries return the LATC formats?
213 * The OpenGL 2.1 specification says "The only values returned
214 * by this query [GL_COMPRESSED_TEXTURE_FORMATS"] are those
215 * corresponding to formats suitable for general-purpose usage.
216 * The renderer will not enumerate formats with restrictions that
217 * need to be specifically understood prior to use."
219 * Historically, OpenGL implementation have advertised the RGB and
220 * RGBA versions of the S3TC extensions compressed format tokens
221 * through this mechanism.
223 * The specification is not sufficiently clear about what "suitable
224 * for general-purpose usage" means. Historically that seems to mean
225 * unsigned RGB or unsigned RGBA. The DXT1 format supporting alpha
226 * (GL_COMPRESSED_RGBA_S3TC_DXT1_EXT) is not exposed in the list (at
227 * least for NVIDIA drivers) because the alpha is always 1.0 expect
228 * when it is 0.0 when RGB is required to be black. NVIDIA's even
229 * limits itself to true linear RGB or RGBA formats, specifically
230 * not including EXT_texture_sRGB's sRGB S3TC compressed formats.
232 * Adding luminance and luminance-alpha texture formats (and
233 * certainly signed versions of luminance and luminance-alpha
234 * formats!) invites potential comptaibility problems with old
235 * applications using this mechanism since old applications are
236 * unlikely to expect non-RGB or non-RGBA formats to be advertised
237 * through this mechanism. However no specific misinteractions
238 * with old applications is known.
240 * Applications that seek to use the LATC formats should do so
241 * by looking for this extension's name in the string returned by
242 * glGetString(GL_EXTENSIONS) rather than
243 * what GL_NUM_COMPRESSED_TEXTURE_FORMATS and
244 * GL_COMPRESSED_TEXTURE_FORMATS return."
246 * There is no formal spec for GL_ATI_texture_compression_3dc. Since the
247 * formats added by this extension are luminance-alpha formats, it is
248 * reasonable to expect them to follow the same rules as
249 * GL_EXT_texture_compression_latc. At the very least, Catalyst 11.6 does not
250 * expose the 3dc formats through this mechanism.
252 * The spec for GL_ARB_texture_compression_bptc doesn't mention whether it
253 * should be included in GL_COMPRESSED_TEXTURE_FORMATS. However as it takes a
254 * very long time to compress the textures in this format it's probably not
255 * very useful as a general format where the GL will have to compress it on
258 * \param ctx the GL context
259 * \param formats the resulting format list (may be NULL).
261 * \return number of formats.
264 _mesa_get_compressed_formats(struct gl_context
*ctx
, GLint
*formats
)
267 if (_mesa_is_desktop_gl(ctx
) &&
268 ctx
->Extensions
.TDFX_texture_compression_FXT1
) {
270 formats
[n
++] = GL_COMPRESSED_RGB_FXT1_3DFX
;
271 formats
[n
++] = GL_COMPRESSED_RGBA_FXT1_3DFX
;
278 if (ctx
->Extensions
.EXT_texture_compression_s3tc
) {
280 formats
[n
++] = GL_COMPRESSED_RGB_S3TC_DXT1_EXT
;
281 formats
[n
++] = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
;
282 formats
[n
++] = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
;
288 /* The ES and desktop GL specs diverge here.
290 * In desktop OpenGL, the driver can perform online compression of
291 * uncompressed texture data. GL_NUM_COMPRESSED_TEXTURE_FORMATS and
292 * GL_COMPRESSED_TEXTURE_FORMATS give the application a list of
293 * formats that it could ask the driver to compress with some
294 * expectation of quality. The GL_ARB_texture_compression spec
295 * calls this "suitable for general-purpose usage." As noted
296 * above, this means GL_COMPRESSED_RGBA_S3TC_DXT1_EXT is not
297 * included in the list.
299 * In OpenGL ES, the driver never performs compression.
300 * GL_NUM_COMPRESSED_TEXTURE_FORMATS and
301 * GL_COMPRESSED_TEXTURE_FORMATS give the application a list of
302 * formats that the driver can receive from the application. It
303 * is the *complete* list of formats. The
304 * GL_EXT_texture_compression_s3tc spec says:
306 * "New State for OpenGL ES 2.0.25 and 3.0.2 Specifications
308 * The queries for NUM_COMPRESSED_TEXTURE_FORMATS and
309 * COMPRESSED_TEXTURE_FORMATS include
310 * COMPRESSED_RGB_S3TC_DXT1_EXT,
311 * COMPRESSED_RGBA_S3TC_DXT1_EXT,
312 * COMPRESSED_RGBA_S3TC_DXT3_EXT, and
313 * COMPRESSED_RGBA_S3TC_DXT5_EXT."
315 * Note that the addition is only to the OpenGL ES specification!
317 if (_mesa_is_gles(ctx
)) {
319 formats
[n
++] = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
;
326 /* The GL_OES_compressed_ETC1_RGB8_texture spec says:
330 * The queries for NUM_COMPRESSED_TEXTURE_FORMATS and
331 * COMPRESSED_TEXTURE_FORMATS include ETC1_RGB8_OES."
333 if (_mesa_is_gles(ctx
)
334 && ctx
->Extensions
.OES_compressed_ETC1_RGB8_texture
) {
336 formats
[n
++] = GL_ETC1_RGB8_OES
;
343 if (ctx
->API
== API_OPENGLES
) {
345 formats
[n
++] = GL_PALETTE4_RGB8_OES
;
346 formats
[n
++] = GL_PALETTE4_RGBA8_OES
;
347 formats
[n
++] = GL_PALETTE4_R5_G6_B5_OES
;
348 formats
[n
++] = GL_PALETTE4_RGBA4_OES
;
349 formats
[n
++] = GL_PALETTE4_RGB5_A1_OES
;
350 formats
[n
++] = GL_PALETTE8_RGB8_OES
;
351 formats
[n
++] = GL_PALETTE8_RGBA8_OES
;
352 formats
[n
++] = GL_PALETTE8_R5_G6_B5_OES
;
353 formats
[n
++] = GL_PALETTE8_RGBA4_OES
;
354 formats
[n
++] = GL_PALETTE8_RGB5_A1_OES
;
361 if (_mesa_is_gles3(ctx
) || ctx
->Extensions
.ARB_ES3_compatibility
) {
363 formats
[n
++] = GL_COMPRESSED_RGB8_ETC2
;
364 formats
[n
++] = GL_COMPRESSED_RGBA8_ETC2_EAC
;
365 formats
[n
++] = GL_COMPRESSED_R11_EAC
;
366 formats
[n
++] = GL_COMPRESSED_RG11_EAC
;
367 formats
[n
++] = GL_COMPRESSED_SIGNED_R11_EAC
;
368 formats
[n
++] = GL_COMPRESSED_SIGNED_RG11_EAC
;
369 formats
[n
++] = GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
;
375 if (_mesa_is_gles3(ctx
)) {
377 formats
[n
++] = GL_COMPRESSED_SRGB8_ETC2
;
378 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
;
379 formats
[n
++] = GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
;
385 /* The KHR_texture_compression_astc_hdr spec says:
387 * "Interactions with OpenGL 4.2
389 * OpenGL 4.2 supports the feature that compressed textures can be
390 * compressed online, by passing the compressed texture format enum as
391 * the internal format when uploading a texture using TexImage1D,
392 * TexImage2D or TexImage3D (see Section 3.9.3, Texture Image
393 * Specification, subsection Encoding of Special Internal Formats).
395 * Due to the complexity of the ASTC compression algorithm, it is not
396 * usually suitable for online use, and therefore ASTC support will be
397 * limited to pre-compressed textures only. Where on-device compression
398 * is required, a domain-specific limited compressor will typically
399 * be used, and this is therefore not suitable for implementation in
402 * In particular, the ASTC format specifiers will not be added to
403 * Table 3.14, and thus will not be accepted by the TexImage*D
404 * functions, and will not be returned by the (already deprecated)
405 * COMPRESSED_TEXTURE_FORMATS query."
407 * The ES and the desktop specs diverge here. In OpenGL ES, the COMPRESSED_TEXTURE_FORMATS
408 * query returns the set of supported specific compressed formats.
410 if (ctx
->API
== API_OPENGLES2
&&
411 ctx
->Extensions
.KHR_texture_compression_astc_ldr
) {
413 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_4x4_KHR
;
414 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_5x4_KHR
;
415 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_5x5_KHR
;
416 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_6x5_KHR
;
417 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_6x6_KHR
;
418 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_8x5_KHR
;
419 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_8x6_KHR
;
420 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_8x8_KHR
;
421 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_10x5_KHR
;
422 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_10x6_KHR
;
423 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_10x8_KHR
;
424 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_10x10_KHR
;
425 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_12x10_KHR
;
426 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_12x12_KHR
;
427 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR
;
428 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR
;
429 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR
;
430 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR
;
431 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR
;
432 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR
;
433 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR
;
434 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR
;
435 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR
;
436 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
;
437 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR
;
438 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR
;
439 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR
;
440 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR
;
447 if (_mesa_is_gles3(ctx
) &&
448 ctx
->Extensions
.OES_texture_compression_astc
) {
450 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_3x3x3_OES
;
451 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_4x3x3_OES
;
452 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_4x4x3_OES
;
453 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_4x4x4_OES
;
454 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_5x4x4_OES
;
455 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_5x5x4_OES
;
456 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_5x5x5_OES
;
457 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_6x5x5_OES
;
458 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_6x6x5_OES
;
459 formats
[n
++] = GL_COMPRESSED_RGBA_ASTC_6x6x6_OES
;
460 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES
;
461 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES
;
462 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES
;
463 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES
;
464 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES
;
465 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES
;
466 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES
;
467 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES
;
468 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES
;
469 formats
[n
++] = GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES
;
481 * Convert GLenum to a compressed MESA_FORMAT_x.
484 _mesa_glenum_to_compressed_format(GLenum format
)
487 case GL_COMPRESSED_RGB_FXT1_3DFX
:
488 return MESA_FORMAT_RGB_FXT1
;
489 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
490 return MESA_FORMAT_RGBA_FXT1
;
492 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
495 return MESA_FORMAT_RGB_DXT1
;
496 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
497 return MESA_FORMAT_RGBA_DXT1
;
498 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
501 return MESA_FORMAT_RGBA_DXT3
;
502 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
503 return MESA_FORMAT_RGBA_DXT5
;
505 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
506 return MESA_FORMAT_SRGB_DXT1
;
507 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
508 return MESA_FORMAT_SRGBA_DXT1
;
509 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
510 return MESA_FORMAT_SRGBA_DXT3
;
511 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
512 return MESA_FORMAT_SRGBA_DXT5
;
514 case GL_COMPRESSED_RED_RGTC1
:
515 return MESA_FORMAT_R_RGTC1_UNORM
;
516 case GL_COMPRESSED_SIGNED_RED_RGTC1
:
517 return MESA_FORMAT_R_RGTC1_SNORM
;
518 case GL_COMPRESSED_RG_RGTC2
:
519 return MESA_FORMAT_RG_RGTC2_UNORM
;
520 case GL_COMPRESSED_SIGNED_RG_RGTC2
:
521 return MESA_FORMAT_RG_RGTC2_SNORM
;
523 case GL_COMPRESSED_LUMINANCE_LATC1_EXT
:
524 return MESA_FORMAT_L_LATC1_UNORM
;
525 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT
:
526 return MESA_FORMAT_L_LATC1_SNORM
;
527 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT
:
528 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI
:
529 return MESA_FORMAT_LA_LATC2_UNORM
;
530 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT
:
531 return MESA_FORMAT_LA_LATC2_SNORM
;
533 case GL_ETC1_RGB8_OES
:
534 return MESA_FORMAT_ETC1_RGB8
;
535 case GL_COMPRESSED_RGB8_ETC2
:
536 return MESA_FORMAT_ETC2_RGB8
;
537 case GL_COMPRESSED_SRGB8_ETC2
:
538 return MESA_FORMAT_ETC2_SRGB8
;
539 case GL_COMPRESSED_RGBA8_ETC2_EAC
:
540 return MESA_FORMAT_ETC2_RGBA8_EAC
;
541 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
:
542 return MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC
;
543 case GL_COMPRESSED_R11_EAC
:
544 return MESA_FORMAT_ETC2_R11_EAC
;
545 case GL_COMPRESSED_RG11_EAC
:
546 return MESA_FORMAT_ETC2_RG11_EAC
;
547 case GL_COMPRESSED_SIGNED_R11_EAC
:
548 return MESA_FORMAT_ETC2_SIGNED_R11_EAC
;
549 case GL_COMPRESSED_SIGNED_RG11_EAC
:
550 return MESA_FORMAT_ETC2_SIGNED_RG11_EAC
;
551 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
:
552 return MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1
;
553 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
:
554 return MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1
;
556 case GL_COMPRESSED_RGBA_BPTC_UNORM
:
557 return MESA_FORMAT_BPTC_RGBA_UNORM
;
558 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM
:
559 return MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM
;
560 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT
:
561 return MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT
;
562 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT
:
563 return MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT
;
565 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR
:
566 return MESA_FORMAT_RGBA_ASTC_4x4
;
567 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR
:
568 return MESA_FORMAT_RGBA_ASTC_5x4
;
569 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR
:
570 return MESA_FORMAT_RGBA_ASTC_5x5
;
571 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR
:
572 return MESA_FORMAT_RGBA_ASTC_6x5
;
573 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR
:
574 return MESA_FORMAT_RGBA_ASTC_6x6
;
575 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR
:
576 return MESA_FORMAT_RGBA_ASTC_8x5
;
577 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR
:
578 return MESA_FORMAT_RGBA_ASTC_8x6
;
579 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR
:
580 return MESA_FORMAT_RGBA_ASTC_8x8
;
581 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR
:
582 return MESA_FORMAT_RGBA_ASTC_10x5
;
583 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR
:
584 return MESA_FORMAT_RGBA_ASTC_10x6
;
585 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR
:
586 return MESA_FORMAT_RGBA_ASTC_10x8
;
587 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR
:
588 return MESA_FORMAT_RGBA_ASTC_10x10
;
589 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR
:
590 return MESA_FORMAT_RGBA_ASTC_12x10
;
591 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR
:
592 return MESA_FORMAT_RGBA_ASTC_12x12
;
593 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR
:
594 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4
;
595 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR
:
596 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4
;
597 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR
:
598 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5
;
599 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR
:
600 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5
;
601 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR
:
602 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6
;
603 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR
:
604 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5
;
605 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR
:
606 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6
;
607 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR
:
608 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8
;
609 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR
:
610 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5
;
611 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
:
612 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6
;
613 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR
:
614 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8
;
615 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR
:
616 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10
;
617 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR
:
618 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10
;
619 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR
:
620 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12
;
621 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES
:
622 return MESA_FORMAT_RGBA_ASTC_3x3x3
;
623 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES
:
624 return MESA_FORMAT_RGBA_ASTC_4x3x3
;
625 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES
:
626 return MESA_FORMAT_RGBA_ASTC_4x4x3
;
627 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES
:
628 return MESA_FORMAT_RGBA_ASTC_4x4x4
;
629 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES
:
630 return MESA_FORMAT_RGBA_ASTC_5x4x4
;
631 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES
:
632 return MESA_FORMAT_RGBA_ASTC_5x5x4
;
633 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES
:
634 return MESA_FORMAT_RGBA_ASTC_5x5x5
;
635 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES
:
636 return MESA_FORMAT_RGBA_ASTC_6x5x5
;
637 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES
:
638 return MESA_FORMAT_RGBA_ASTC_6x6x5
;
639 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES
:
640 return MESA_FORMAT_RGBA_ASTC_6x6x6
;
641 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES
:
642 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_3x3x3
;
643 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES
:
644 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x3x3
;
645 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES
:
646 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4x3
;
647 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES
:
648 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4x4
;
649 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES
:
650 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4x4
;
651 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES
:
652 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5x4
;
653 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES
:
654 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5x5
;
655 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES
:
656 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5x5
;
657 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES
:
658 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6x5
;
659 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES
:
660 return MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6x6
;
663 return MESA_FORMAT_NONE
;
669 * Given a compressed MESA_FORMAT_x value, return the corresponding
670 * GLenum for that format.
671 * This is needed for glGetTexLevelParameter(GL_TEXTURE_INTERNAL_FORMAT)
672 * which must return the specific texture format used when the user might
673 * have originally specified a generic compressed format in their
674 * glTexImage2D() call.
675 * For non-compressed textures, we always return the user-specified
676 * internal format unchanged.
679 _mesa_compressed_format_to_glenum(struct gl_context
*ctx
, mesa_format mesaFormat
)
681 switch (mesaFormat
) {
682 case MESA_FORMAT_RGB_FXT1
:
683 return GL_COMPRESSED_RGB_FXT1_3DFX
;
684 case MESA_FORMAT_RGBA_FXT1
:
685 return GL_COMPRESSED_RGBA_FXT1_3DFX
;
686 case MESA_FORMAT_RGB_DXT1
:
687 return GL_COMPRESSED_RGB_S3TC_DXT1_EXT
;
688 case MESA_FORMAT_RGBA_DXT1
:
689 return GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
;
690 case MESA_FORMAT_RGBA_DXT3
:
691 return GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
;
692 case MESA_FORMAT_RGBA_DXT5
:
693 return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
;
694 case MESA_FORMAT_SRGB_DXT1
:
695 return GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
;
696 case MESA_FORMAT_SRGBA_DXT1
:
697 return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
;
698 case MESA_FORMAT_SRGBA_DXT3
:
699 return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
;
700 case MESA_FORMAT_SRGBA_DXT5
:
701 return GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
;
702 case MESA_FORMAT_R_RGTC1_UNORM
:
703 return GL_COMPRESSED_RED_RGTC1
;
704 case MESA_FORMAT_R_RGTC1_SNORM
:
705 return GL_COMPRESSED_SIGNED_RED_RGTC1
;
706 case MESA_FORMAT_RG_RGTC2_UNORM
:
707 return GL_COMPRESSED_RG_RGTC2
;
708 case MESA_FORMAT_RG_RGTC2_SNORM
:
709 return GL_COMPRESSED_SIGNED_RG_RGTC2
;
711 case MESA_FORMAT_L_LATC1_UNORM
:
712 return GL_COMPRESSED_LUMINANCE_LATC1_EXT
;
713 case MESA_FORMAT_L_LATC1_SNORM
:
714 return GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT
;
715 case MESA_FORMAT_LA_LATC2_UNORM
:
716 return GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT
;
717 case MESA_FORMAT_LA_LATC2_SNORM
:
718 return GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT
;
720 case MESA_FORMAT_ETC1_RGB8
:
721 return GL_ETC1_RGB8_OES
;
722 case MESA_FORMAT_ETC2_RGB8
:
723 return GL_COMPRESSED_RGB8_ETC2
;
724 case MESA_FORMAT_ETC2_SRGB8
:
725 return GL_COMPRESSED_SRGB8_ETC2
;
726 case MESA_FORMAT_ETC2_RGBA8_EAC
:
727 return GL_COMPRESSED_RGBA8_ETC2_EAC
;
728 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC
:
729 return GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
;
730 case MESA_FORMAT_ETC2_R11_EAC
:
731 return GL_COMPRESSED_R11_EAC
;
732 case MESA_FORMAT_ETC2_RG11_EAC
:
733 return GL_COMPRESSED_RG11_EAC
;
734 case MESA_FORMAT_ETC2_SIGNED_R11_EAC
:
735 return GL_COMPRESSED_SIGNED_R11_EAC
;
736 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC
:
737 return GL_COMPRESSED_SIGNED_RG11_EAC
;
738 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1
:
739 return GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
;
740 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1
:
741 return GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
;
743 case MESA_FORMAT_BPTC_RGBA_UNORM
:
744 return GL_COMPRESSED_RGBA_BPTC_UNORM
;
745 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM
:
746 return GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM
;
747 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT
:
748 return GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT
;
749 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT
:
750 return GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT
;
752 case MESA_FORMAT_RGBA_ASTC_4x4
:
753 return GL_COMPRESSED_RGBA_ASTC_4x4_KHR
;
754 case MESA_FORMAT_RGBA_ASTC_5x4
:
755 return GL_COMPRESSED_RGBA_ASTC_5x4_KHR
;
756 case MESA_FORMAT_RGBA_ASTC_5x5
:
757 return GL_COMPRESSED_RGBA_ASTC_5x5_KHR
;
758 case MESA_FORMAT_RGBA_ASTC_6x5
:
759 return GL_COMPRESSED_RGBA_ASTC_6x5_KHR
;
760 case MESA_FORMAT_RGBA_ASTC_6x6
:
761 return GL_COMPRESSED_RGBA_ASTC_6x6_KHR
;
762 case MESA_FORMAT_RGBA_ASTC_8x5
:
763 return GL_COMPRESSED_RGBA_ASTC_8x5_KHR
;
764 case MESA_FORMAT_RGBA_ASTC_8x6
:
765 return GL_COMPRESSED_RGBA_ASTC_8x6_KHR
;
766 case MESA_FORMAT_RGBA_ASTC_8x8
:
767 return GL_COMPRESSED_RGBA_ASTC_8x8_KHR
;
768 case MESA_FORMAT_RGBA_ASTC_10x5
:
769 return GL_COMPRESSED_RGBA_ASTC_10x5_KHR
;
770 case MESA_FORMAT_RGBA_ASTC_10x6
:
771 return GL_COMPRESSED_RGBA_ASTC_10x6_KHR
;
772 case MESA_FORMAT_RGBA_ASTC_10x8
:
773 return GL_COMPRESSED_RGBA_ASTC_10x8_KHR
;
774 case MESA_FORMAT_RGBA_ASTC_10x10
:
775 return GL_COMPRESSED_RGBA_ASTC_10x10_KHR
;
776 case MESA_FORMAT_RGBA_ASTC_12x10
:
777 return GL_COMPRESSED_RGBA_ASTC_12x10_KHR
;
778 case MESA_FORMAT_RGBA_ASTC_12x12
:
779 return GL_COMPRESSED_RGBA_ASTC_12x12_KHR
;
780 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4
:
781 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR
;
782 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4
:
783 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR
;
784 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5
:
785 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR
;
786 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5
:
787 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR
;
788 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6
:
789 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR
;
790 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5
:
791 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR
;
792 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6
:
793 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR
;
794 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8
:
795 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR
;
796 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5
:
797 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR
;
798 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6
:
799 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR
;
800 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8
:
801 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR
;
802 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10
:
803 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR
;
804 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10
:
805 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR
;
806 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12
:
807 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR
;
809 case MESA_FORMAT_RGBA_ASTC_3x3x3
:
810 return GL_COMPRESSED_RGBA_ASTC_3x3x3_OES
;
811 case MESA_FORMAT_RGBA_ASTC_4x3x3
:
812 return GL_COMPRESSED_RGBA_ASTC_4x3x3_OES
;
813 case MESA_FORMAT_RGBA_ASTC_4x4x3
:
814 return GL_COMPRESSED_RGBA_ASTC_4x4x3_OES
;
815 case MESA_FORMAT_RGBA_ASTC_4x4x4
:
816 return GL_COMPRESSED_RGBA_ASTC_4x4x4_OES
;
817 case MESA_FORMAT_RGBA_ASTC_5x4x4
:
818 return GL_COMPRESSED_RGBA_ASTC_5x4x4_OES
;
819 case MESA_FORMAT_RGBA_ASTC_5x5x4
:
820 return GL_COMPRESSED_RGBA_ASTC_5x5x4_OES
;
821 case MESA_FORMAT_RGBA_ASTC_5x5x5
:
822 return GL_COMPRESSED_RGBA_ASTC_5x5x5_OES
;
823 case MESA_FORMAT_RGBA_ASTC_6x5x5
:
824 return GL_COMPRESSED_RGBA_ASTC_6x5x5_OES
;
825 case MESA_FORMAT_RGBA_ASTC_6x6x5
:
826 return GL_COMPRESSED_RGBA_ASTC_6x6x5_OES
;
827 case MESA_FORMAT_RGBA_ASTC_6x6x6
:
828 return GL_COMPRESSED_RGBA_ASTC_6x6x6_OES
;
829 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_3x3x3
:
830 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES
;
831 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x3x3
:
832 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES
;
833 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4x3
:
834 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES
;
835 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4x4
:
836 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES
;
837 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4x4
:
838 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES
;
839 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5x4
:
840 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES
;
841 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5x5
:
842 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES
;
843 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5x5
:
844 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES
;
845 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6x5
:
846 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES
;
847 case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6x6
:
848 return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES
;
850 _mesa_problem(ctx
, "Unexpected mesa texture format in"
851 " _mesa_compressed_format_to_glenum()");
858 * Return the address of the pixel at (col, row, img) in a
859 * compressed texture image.
860 * \param col, row, img - image position (3D), should be a multiple of the
861 * format's block size.
862 * \param format - compressed image format
863 * \param width - image width (stride) in pixels
864 * \param image - the image address
865 * \return address of pixel at (row, col, img)
868 _mesa_compressed_image_address(GLint col
, GLint row
, GLint img
,
869 mesa_format mesaFormat
,
870 GLsizei width
, const GLubyte
*image
)
872 /* XXX only 2D images implemented, not 3D */
873 const GLuint blockSize
= _mesa_get_format_bytes(mesaFormat
);
877 _mesa_get_format_block_size(mesaFormat
, &bw
, &bh
);
879 assert(col
% bw
== 0);
880 assert(row
% bh
== 0);
882 offset
= ((width
+ bw
- 1) / bw
) * (row
/ bh
) + col
/ bw
;
885 return (GLubyte
*) image
+ offset
;
890 * Return a texel-fetch function for the given format, or NULL if
893 compressed_fetch_func
894 _mesa_get_compressed_fetch_func(mesa_format format
)
896 switch (_mesa_get_format_layout(format
)) {
897 case MESA_FORMAT_LAYOUT_S3TC
:
898 return _mesa_get_dxt_fetch_func(format
);
899 case MESA_FORMAT_LAYOUT_FXT1
:
900 return _mesa_get_fxt_fetch_func(format
);
901 case MESA_FORMAT_LAYOUT_RGTC
:
902 case MESA_FORMAT_LAYOUT_LATC
:
903 return _mesa_get_compressed_rgtc_func(format
);
904 case MESA_FORMAT_LAYOUT_ETC1
:
905 return _mesa_get_etc_fetch_func(format
);
906 case MESA_FORMAT_LAYOUT_BPTC
:
907 return _mesa_get_bptc_fetch_func(format
);
915 * Decompress a compressed texture image, returning a GL_RGBA/GL_FLOAT image.
916 * \param srcRowStride stride in bytes between rows of blocks in the
917 * compressed source image.
920 _mesa_decompress_image(mesa_format format
, GLuint width
, GLuint height
,
921 const GLubyte
*src
, GLint srcRowStride
,
924 compressed_fetch_func fetch
;
926 GLuint bytes
, bw
, bh
;
929 bytes
= _mesa_get_format_bytes(format
);
930 _mesa_get_format_block_size(format
, &bw
, &bh
);
932 fetch
= _mesa_get_compressed_fetch_func(format
);
934 _mesa_problem(NULL
, "Unexpected format in _mesa_decompress_image()");
938 stride
= srcRowStride
* bh
/ bytes
;
940 for (j
= 0; j
< height
; j
++) {
941 for (i
= 0; i
< width
; i
++) {
942 fetch(src
, stride
, i
, j
, dest
);