1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright (c) 2008-2010 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
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Mesa / Gallium format conversion and format selection code.
35 #include "main/imports.h"
36 #include "main/context.h"
37 #include "main/texstore.h"
38 #include "main/enums.h"
39 #include "main/macros.h"
41 #include "pipe/p_context.h"
42 #include "pipe/p_defines.h"
43 #include "pipe/p_screen.h"
44 #include "util/u_format.h"
45 #include "st_context.h"
46 #include "st_format.h"
50 format_max_bits(enum pipe_format format
)
52 GLuint size
= util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 0);
54 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 1));
55 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 2));
56 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 3));
57 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 0));
58 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 1));
64 * Return basic GL datatype for the given gallium format.
67 st_format_datatype(enum pipe_format format
)
69 const struct util_format_description
*desc
;
71 desc
= util_format_description(format
);
74 if (desc
->layout
== UTIL_FORMAT_LAYOUT_PLAIN
) {
75 if (format
== PIPE_FORMAT_B5G5R5A1_UNORM
||
76 format
== PIPE_FORMAT_B5G6R5_UNORM
) {
77 return GL_UNSIGNED_SHORT
;
79 else if (format
== PIPE_FORMAT_Z24_UNORM_S8_USCALED
||
80 format
== PIPE_FORMAT_S8_USCALED_Z24_UNORM
) {
81 return GL_UNSIGNED_INT_24_8
;
84 const GLuint size
= format_max_bits(format
);
86 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
87 return GL_UNSIGNED_BYTE
;
91 else if (size
== 16) {
92 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
93 return GL_UNSIGNED_SHORT
;
99 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
100 return GL_UNSIGNED_INT
;
106 else if (format
== PIPE_FORMAT_UYVY
) {
107 return GL_UNSIGNED_SHORT
;
109 else if (format
== PIPE_FORMAT_YUYV
) {
110 return GL_UNSIGNED_SHORT
;
113 /* compressed format? */
123 * Translate Mesa format to Gallium format.
126 st_mesa_format_to_pipe_format(gl_format mesaFormat
)
128 switch (mesaFormat
) {
130 case MESA_FORMAT_ARGB8888_REV
:
131 case MESA_FORMAT_ARGB8888
:
132 return PIPE_FORMAT_B8G8R8A8_UNORM
;
133 case MESA_FORMAT_XRGB8888
:
134 return PIPE_FORMAT_B8G8R8X8_UNORM
;
135 case MESA_FORMAT_ARGB1555
:
136 return PIPE_FORMAT_B5G5R5A1_UNORM
;
137 case MESA_FORMAT_ARGB4444
:
138 return PIPE_FORMAT_B4G4R4A4_UNORM
;
139 case MESA_FORMAT_RGB565
:
140 return PIPE_FORMAT_B5G6R5_UNORM
;
141 case MESA_FORMAT_AL88
:
142 return PIPE_FORMAT_L8A8_UNORM
;
144 return PIPE_FORMAT_A8_UNORM
;
146 return PIPE_FORMAT_L8_UNORM
;
148 return PIPE_FORMAT_I8_UNORM
;
149 case MESA_FORMAT_Z16
:
150 return PIPE_FORMAT_Z16_UNORM
;
151 case MESA_FORMAT_Z32
:
152 return PIPE_FORMAT_Z32_UNORM
;
153 case MESA_FORMAT_Z24_S8
:
154 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
155 case MESA_FORMAT_S8_Z24
:
156 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
157 case MESA_FORMAT_YCBCR
:
158 return PIPE_FORMAT_UYVY
;
159 #if FEATURE_texture_s3tc
160 case MESA_FORMAT_RGB_DXT1
:
161 return PIPE_FORMAT_DXT1_RGB
;
162 case MESA_FORMAT_RGBA_DXT1
:
163 return PIPE_FORMAT_DXT1_RGBA
;
164 case MESA_FORMAT_RGBA_DXT3
:
165 return PIPE_FORMAT_DXT3_RGBA
;
166 case MESA_FORMAT_RGBA_DXT5
:
167 return PIPE_FORMAT_DXT5_RGBA
;
168 #if FEATURE_EXT_texture_sRGB
169 case MESA_FORMAT_SRGB_DXT1
:
170 return PIPE_FORMAT_DXT1_SRGB
;
171 case MESA_FORMAT_SRGBA_DXT1
:
172 return PIPE_FORMAT_DXT1_SRGBA
;
173 case MESA_FORMAT_SRGBA_DXT3
:
174 return PIPE_FORMAT_DXT3_SRGBA
;
175 case MESA_FORMAT_SRGBA_DXT5
:
176 return PIPE_FORMAT_DXT5_SRGBA
;
179 #if FEATURE_EXT_texture_sRGB
180 case MESA_FORMAT_SLA8
:
181 return PIPE_FORMAT_L8A8_SRGB
;
182 case MESA_FORMAT_SL8
:
183 return PIPE_FORMAT_L8_SRGB
;
184 case MESA_FORMAT_SRGB8
:
185 return PIPE_FORMAT_R8G8B8_SRGB
;
186 case MESA_FORMAT_SRGBA8
:
187 return PIPE_FORMAT_A8B8G8R8_SRGB
;
188 case MESA_FORMAT_SARGB8
:
189 return PIPE_FORMAT_B8G8R8A8_SRGB
;
199 * Translate Gallium format to Mesa format.
202 st_pipe_format_to_mesa_format(enum pipe_format format
)
205 case PIPE_FORMAT_B8G8R8A8_UNORM
:
206 return MESA_FORMAT_ARGB8888
;
207 case PIPE_FORMAT_B8G8R8X8_UNORM
:
208 return MESA_FORMAT_XRGB8888
;
209 case PIPE_FORMAT_A8R8G8B8_UNORM
:
210 return MESA_FORMAT_ARGB8888_REV
;
211 case PIPE_FORMAT_X8R8G8B8_UNORM
:
212 return MESA_FORMAT_XRGB8888_REV
;
213 case PIPE_FORMAT_B5G5R5A1_UNORM
:
214 return MESA_FORMAT_ARGB1555
;
215 case PIPE_FORMAT_B4G4R4A4_UNORM
:
216 return MESA_FORMAT_ARGB4444
;
217 case PIPE_FORMAT_B5G6R5_UNORM
:
218 return MESA_FORMAT_RGB565
;
219 case PIPE_FORMAT_L8A8_UNORM
:
220 return MESA_FORMAT_AL88
;
221 case PIPE_FORMAT_A8_UNORM
:
222 return MESA_FORMAT_A8
;
223 case PIPE_FORMAT_L8_UNORM
:
224 return MESA_FORMAT_L8
;
225 case PIPE_FORMAT_I8_UNORM
:
226 return MESA_FORMAT_I8
;
227 case PIPE_FORMAT_S8_USCALED
:
228 return MESA_FORMAT_S8
;
230 case PIPE_FORMAT_R16G16B16A16_SNORM
:
231 return MESA_FORMAT_SIGNED_RGBA_16
;
233 case PIPE_FORMAT_Z16_UNORM
:
234 return MESA_FORMAT_Z16
;
235 case PIPE_FORMAT_Z32_UNORM
:
236 return MESA_FORMAT_Z32
;
237 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
238 return MESA_FORMAT_Z24_S8
;
239 case PIPE_FORMAT_X8Z24_UNORM
:
240 return MESA_FORMAT_Z24_X8
;
241 case PIPE_FORMAT_Z24X8_UNORM
:
242 return MESA_FORMAT_X8_Z24
;
243 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
244 return MESA_FORMAT_S8_Z24
;
246 case PIPE_FORMAT_UYVY
:
247 return MESA_FORMAT_YCBCR
;
248 case PIPE_FORMAT_YUYV
:
249 return MESA_FORMAT_YCBCR_REV
;
251 #if FEATURE_texture_s3tc
252 case PIPE_FORMAT_DXT1_RGB
:
253 return MESA_FORMAT_RGB_DXT1
;
254 case PIPE_FORMAT_DXT1_RGBA
:
255 return MESA_FORMAT_RGBA_DXT1
;
256 case PIPE_FORMAT_DXT3_RGBA
:
257 return MESA_FORMAT_RGBA_DXT3
;
258 case PIPE_FORMAT_DXT5_RGBA
:
259 return MESA_FORMAT_RGBA_DXT5
;
260 #if FEATURE_EXT_texture_sRGB
261 case PIPE_FORMAT_DXT1_SRGB
:
262 return MESA_FORMAT_SRGB_DXT1
;
263 case PIPE_FORMAT_DXT1_SRGBA
:
264 return MESA_FORMAT_SRGBA_DXT1
;
265 case PIPE_FORMAT_DXT3_SRGBA
:
266 return MESA_FORMAT_SRGBA_DXT3
;
267 case PIPE_FORMAT_DXT5_SRGBA
:
268 return MESA_FORMAT_SRGBA_DXT5
;
272 #if FEATURE_EXT_texture_sRGB
273 case PIPE_FORMAT_L8A8_SRGB
:
274 return MESA_FORMAT_SLA8
;
275 case PIPE_FORMAT_L8_SRGB
:
276 return MESA_FORMAT_SL8
;
277 case PIPE_FORMAT_R8G8B8_SRGB
:
278 return MESA_FORMAT_SRGB8
;
279 case PIPE_FORMAT_A8B8G8R8_SRGB
:
280 return MESA_FORMAT_SRGBA8
;
281 case PIPE_FORMAT_B8G8R8A8_SRGB
:
282 return MESA_FORMAT_SARGB8
;
286 return MESA_FORMAT_NONE
;
292 * Find an RGBA format supported by the context/winsys.
294 static enum pipe_format
295 default_rgba_format(struct pipe_screen
*screen
,
296 enum pipe_texture_target target
,
300 static const enum pipe_format colorFormats
[] = {
301 PIPE_FORMAT_B8G8R8A8_UNORM
,
302 PIPE_FORMAT_A8R8G8B8_UNORM
,
303 PIPE_FORMAT_A8B8G8R8_UNORM
,
304 PIPE_FORMAT_B5G6R5_UNORM
307 for (i
= 0; i
< Elements(colorFormats
); i
++) {
308 if (screen
->is_format_supported( screen
, colorFormats
[i
], target
, tex_usage
, geom_flags
)) {
309 return colorFormats
[i
];
312 return PIPE_FORMAT_NONE
;
316 * Find an RGB format supported by the context/winsys.
318 static enum pipe_format
319 default_rgb_format(struct pipe_screen
*screen
,
320 enum pipe_texture_target target
,
324 static const enum pipe_format colorFormats
[] = {
325 PIPE_FORMAT_B8G8R8X8_UNORM
,
326 PIPE_FORMAT_X8R8G8B8_UNORM
,
327 PIPE_FORMAT_X8B8G8R8_UNORM
,
328 PIPE_FORMAT_B8G8R8A8_UNORM
,
329 PIPE_FORMAT_A8R8G8B8_UNORM
,
330 PIPE_FORMAT_A8B8G8R8_UNORM
,
331 PIPE_FORMAT_B5G6R5_UNORM
334 for (i
= 0; i
< Elements(colorFormats
); i
++) {
335 if (screen
->is_format_supported( screen
, colorFormats
[i
], target
, tex_usage
, geom_flags
)) {
336 return colorFormats
[i
];
339 return PIPE_FORMAT_NONE
;
343 * Find an sRGBA format supported by the context/winsys.
345 static enum pipe_format
346 default_srgba_format(struct pipe_screen
*screen
,
347 enum pipe_texture_target target
,
351 static const enum pipe_format colorFormats
[] = {
352 PIPE_FORMAT_B8G8R8A8_SRGB
,
353 PIPE_FORMAT_A8R8G8B8_SRGB
,
354 PIPE_FORMAT_A8B8G8R8_SRGB
,
357 for (i
= 0; i
< Elements(colorFormats
); i
++) {
358 if (screen
->is_format_supported( screen
, colorFormats
[i
], target
, tex_usage
, geom_flags
)) {
359 return colorFormats
[i
];
362 return PIPE_FORMAT_NONE
;
366 * Search list of formats for first RGBA format with >8 bits/channel.
368 static enum pipe_format
369 default_deep_rgba_format(struct pipe_screen
*screen
,
370 enum pipe_texture_target target
,
374 if (screen
->is_format_supported(screen
, PIPE_FORMAT_R16G16B16A16_SNORM
, target
, tex_usage
, geom_flags
)) {
375 return PIPE_FORMAT_R16G16B16A16_SNORM
;
377 if (tex_usage
& PIPE_TEXTURE_USAGE_RENDER_TARGET
)
378 return default_rgba_format(screen
, target
, tex_usage
, geom_flags
);
380 return PIPE_FORMAT_NONE
;
385 * Find an Z format supported by the context/winsys.
387 static enum pipe_format
388 default_depth_format(struct pipe_screen
*screen
,
389 enum pipe_texture_target target
,
393 static const enum pipe_format zFormats
[] = {
394 PIPE_FORMAT_Z16_UNORM
,
395 PIPE_FORMAT_Z32_UNORM
,
396 PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
397 PIPE_FORMAT_S8_USCALED_Z24_UNORM
400 for (i
= 0; i
< Elements(zFormats
); i
++) {
401 if (screen
->is_format_supported( screen
, zFormats
[i
], target
, tex_usage
, geom_flags
)) {
405 return PIPE_FORMAT_NONE
;
410 * Given an OpenGL internalFormat value for a texture or surface, return
411 * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
412 * \param target one of PIPE_TEXTURE_x
413 * \param tex_usage either PIPE_TEXTURE_USAGE_RENDER_TARGET
414 * or PIPE_TEXTURE_USAGE_SAMPLER
417 st_choose_format(struct pipe_screen
*screen
, GLenum internalFormat
,
418 enum pipe_texture_target target
, unsigned tex_usage
)
420 unsigned geom_flags
= 0;
422 switch (internalFormat
) {
425 case GL_COMPRESSED_RGBA
:
429 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
432 case GL_COMPRESSED_RGB
:
433 return default_rgb_format( screen
, target
, tex_usage
, geom_flags
);
435 if (tex_usage
& PIPE_TEXTURE_USAGE_RENDER_TARGET
)
436 return default_deep_rgba_format( screen
, target
, tex_usage
, geom_flags
);
438 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
442 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B4G4R4A4_UNORM
, target
, tex_usage
, geom_flags
))
443 return PIPE_FORMAT_B4G4R4A4_UNORM
;
444 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
447 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G5R5A1_UNORM
, target
, tex_usage
, geom_flags
))
448 return PIPE_FORMAT_B5G5R5A1_UNORM
;
449 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
455 return default_rgb_format( screen
, target
, tex_usage
, geom_flags
);
460 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G6R5_UNORM
, target
, tex_usage
, geom_flags
))
461 return PIPE_FORMAT_B5G6R5_UNORM
;
462 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G5R5A1_UNORM
, target
, tex_usage
, geom_flags
))
463 return PIPE_FORMAT_B5G5R5A1_UNORM
;
464 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
471 case GL_COMPRESSED_ALPHA
:
472 if (screen
->is_format_supported( screen
, PIPE_FORMAT_A8_UNORM
, target
, tex_usage
, geom_flags
))
473 return PIPE_FORMAT_A8_UNORM
;
474 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
482 case GL_COMPRESSED_LUMINANCE
:
483 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8_UNORM
, target
, tex_usage
, geom_flags
))
484 return PIPE_FORMAT_L8_UNORM
;
485 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
488 case GL_LUMINANCE_ALPHA
:
489 case GL_LUMINANCE4_ALPHA4
:
490 case GL_LUMINANCE6_ALPHA2
:
491 case GL_LUMINANCE8_ALPHA8
:
492 case GL_LUMINANCE12_ALPHA4
:
493 case GL_LUMINANCE12_ALPHA12
:
494 case GL_LUMINANCE16_ALPHA16
:
495 case GL_COMPRESSED_LUMINANCE_ALPHA
:
496 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8A8_UNORM
, target
, tex_usage
, geom_flags
))
497 return PIPE_FORMAT_L8A8_UNORM
;
498 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
505 case GL_COMPRESSED_INTENSITY
:
506 if (screen
->is_format_supported( screen
, PIPE_FORMAT_I8_UNORM
, target
, tex_usage
, geom_flags
))
507 return PIPE_FORMAT_I8_UNORM
;
508 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
511 if (screen
->is_format_supported(screen
, PIPE_FORMAT_UYVY
,
512 target
, tex_usage
, geom_flags
)) {
513 return PIPE_FORMAT_UYVY
;
515 if (screen
->is_format_supported(screen
, PIPE_FORMAT_YUYV
,
516 target
, tex_usage
, geom_flags
)) {
517 return PIPE_FORMAT_YUYV
;
519 return PIPE_FORMAT_NONE
;
523 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
524 return PIPE_FORMAT_DXT1_RGB
;
526 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
527 return PIPE_FORMAT_DXT1_RGBA
;
531 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
532 return PIPE_FORMAT_DXT3_RGBA
;
534 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
535 return PIPE_FORMAT_DXT5_RGBA
;
538 case GL_COMPRESSED_RGB_FXT1_3DFX
:
539 return PIPE_FORMAT_RGB_FXT1
;
540 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
541 return PIPE_FORMAT_RGB_FXT1
;
544 case GL_DEPTH_COMPONENT16
:
545 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z16_UNORM
, target
, tex_usage
, geom_flags
))
546 return PIPE_FORMAT_Z16_UNORM
;
548 case GL_DEPTH_COMPONENT24
:
549 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
, target
, tex_usage
, geom_flags
))
550 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
551 if (screen
->is_format_supported( screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
, target
, tex_usage
, geom_flags
))
552 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
554 case GL_DEPTH_COMPONENT32
:
555 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z32_UNORM
, target
, tex_usage
, geom_flags
))
556 return PIPE_FORMAT_Z32_UNORM
;
558 case GL_DEPTH_COMPONENT
:
559 return default_depth_format( screen
, target
, tex_usage
, geom_flags
);
561 case GL_STENCIL_INDEX
:
562 case GL_STENCIL_INDEX1_EXT
:
563 case GL_STENCIL_INDEX4_EXT
:
564 case GL_STENCIL_INDEX8_EXT
:
565 case GL_STENCIL_INDEX16_EXT
:
566 if (screen
->is_format_supported( screen
, PIPE_FORMAT_S8_USCALED
, target
, tex_usage
, geom_flags
))
567 return PIPE_FORMAT_S8_USCALED
;
568 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
, target
, tex_usage
, geom_flags
))
569 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
570 if (screen
->is_format_supported( screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
, target
, tex_usage
, geom_flags
))
571 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
572 return PIPE_FORMAT_NONE
;
574 case GL_DEPTH_STENCIL_EXT
:
575 case GL_DEPTH24_STENCIL8_EXT
:
576 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
, target
, tex_usage
, geom_flags
))
577 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
578 if (screen
->is_format_supported( screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
, target
, tex_usage
, geom_flags
))
579 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
580 return PIPE_FORMAT_NONE
;
584 case GL_COMPRESSED_SRGB_EXT
:
585 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
586 case GL_SRGB_ALPHA_EXT
:
587 case GL_SRGB8_ALPHA8_EXT
:
588 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
589 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
590 return PIPE_FORMAT_DXT1_SRGB
;
591 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
592 return PIPE_FORMAT_DXT1_SRGBA
;
593 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
594 return PIPE_FORMAT_DXT3_SRGBA
;
595 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
596 return PIPE_FORMAT_DXT5_SRGBA
;
598 case GL_SLUMINANCE_ALPHA_EXT
:
599 case GL_SLUMINANCE8_ALPHA8_EXT
:
600 case GL_COMPRESSED_SLUMINANCE_EXT
:
601 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
602 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8A8_SRGB
, target
, tex_usage
, geom_flags
))
603 return PIPE_FORMAT_L8A8_SRGB
;
604 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
606 case GL_SLUMINANCE_EXT
:
607 case GL_SLUMINANCE8_EXT
:
608 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8_SRGB
, target
, tex_usage
, geom_flags
))
609 return PIPE_FORMAT_L8_SRGB
;
610 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
613 return PIPE_FORMAT_NONE
;
619 is_depth_or_stencil_format(GLenum internalFormat
)
621 switch (internalFormat
) {
622 case GL_DEPTH_COMPONENT
:
623 case GL_DEPTH_COMPONENT16
:
624 case GL_DEPTH_COMPONENT24
:
625 case GL_DEPTH_COMPONENT32
:
626 case GL_STENCIL_INDEX
:
627 case GL_STENCIL_INDEX1_EXT
:
628 case GL_STENCIL_INDEX4_EXT
:
629 case GL_STENCIL_INDEX8_EXT
:
630 case GL_STENCIL_INDEX16_EXT
:
631 case GL_DEPTH_STENCIL_EXT
:
632 case GL_DEPTH24_STENCIL8_EXT
:
640 * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
643 st_choose_renderbuffer_format(struct pipe_screen
*screen
,
644 GLenum internalFormat
)
647 if (is_depth_or_stencil_format(internalFormat
))
648 usage
= PIPE_TEXTURE_USAGE_DEPTH_STENCIL
;
650 usage
= PIPE_TEXTURE_USAGE_RENDER_TARGET
;
651 return st_choose_format(screen
, internalFormat
, PIPE_TEXTURE_2D
, usage
);
656 * Called via ctx->Driver.chooseTextureFormat().
659 st_ChooseTextureFormat(GLcontext
*ctx
, GLint internalFormat
,
660 GLenum format
, GLenum type
)
662 enum pipe_format pFormat
;
667 pFormat
= st_choose_format(ctx
->st
->pipe
->screen
, internalFormat
,
668 PIPE_TEXTURE_2D
, PIPE_TEXTURE_USAGE_SAMPLER
);
669 if (pFormat
== PIPE_FORMAT_NONE
)
670 return MESA_FORMAT_NONE
;
672 return st_pipe_format_to_mesa_format(pFormat
);
677 * Test if a gallium format is equivalent to a GL format/type.
680 st_equal_formats(enum pipe_format pFormat
, GLenum format
, GLenum type
)
683 case PIPE_FORMAT_A8B8G8R8_UNORM
:
684 return format
== GL_RGBA
&& type
== GL_UNSIGNED_BYTE
;
685 case PIPE_FORMAT_A8R8G8B8_UNORM
:
686 return format
== GL_BGRA
&& type
== GL_UNSIGNED_BYTE
;
687 case PIPE_FORMAT_B5G6R5_UNORM
:
688 return format
== GL_RGB
&& type
== GL_UNSIGNED_SHORT_5_6_5
;
689 /* XXX more combos... */