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/image.h"
40 #include "main/macros.h"
42 #include "pipe/p_context.h"
43 #include "pipe/p_defines.h"
44 #include "pipe/p_screen.h"
45 #include "util/u_format.h"
46 #include "st_context.h"
47 #include "st_format.h"
51 format_max_bits(enum pipe_format format
)
53 GLuint size
= util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 0);
55 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 1));
56 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 2));
57 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_RGB
, 3));
58 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 0));
59 size
= MAX2(size
, util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 1));
65 * Return basic GL datatype for the given gallium format.
68 st_format_datatype(enum pipe_format format
)
70 const struct util_format_description
*desc
;
72 desc
= util_format_description(format
);
75 if (desc
->layout
== UTIL_FORMAT_LAYOUT_PLAIN
) {
76 if (format
== PIPE_FORMAT_B5G5R5A1_UNORM
||
77 format
== PIPE_FORMAT_B5G6R5_UNORM
) {
78 return GL_UNSIGNED_SHORT
;
80 else if (format
== PIPE_FORMAT_Z24_UNORM_S8_USCALED
||
81 format
== PIPE_FORMAT_S8_USCALED_Z24_UNORM
) {
82 return GL_UNSIGNED_INT_24_8
;
85 const GLuint size
= format_max_bits(format
);
87 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
88 return GL_UNSIGNED_BYTE
;
92 else if (size
== 16) {
93 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
94 return GL_UNSIGNED_SHORT
;
100 if (desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
)
101 return GL_UNSIGNED_INT
;
107 else if (format
== PIPE_FORMAT_UYVY
) {
108 return GL_UNSIGNED_SHORT
;
110 else if (format
== PIPE_FORMAT_YUYV
) {
111 return GL_UNSIGNED_SHORT
;
114 /* compressed format? */
124 * Translate Mesa format to Gallium format.
127 st_mesa_format_to_pipe_format(gl_format mesaFormat
)
129 switch (mesaFormat
) {
130 case MESA_FORMAT_RGBA8888
:
131 return PIPE_FORMAT_A8B8G8R8_UNORM
;
132 case MESA_FORMAT_RGBA8888_REV
:
133 return PIPE_FORMAT_R8G8B8A8_UNORM
;
134 case MESA_FORMAT_ARGB8888
:
135 return PIPE_FORMAT_B8G8R8A8_UNORM
;
136 case MESA_FORMAT_ARGB8888_REV
:
137 return PIPE_FORMAT_A8R8G8B8_UNORM
;
138 case MESA_FORMAT_XRGB8888
:
139 return PIPE_FORMAT_B8G8R8X8_UNORM
;
140 case MESA_FORMAT_XRGB8888_REV
:
141 return PIPE_FORMAT_X8R8G8B8_UNORM
;
142 case MESA_FORMAT_ARGB1555
:
143 return PIPE_FORMAT_B5G5R5A1_UNORM
;
144 case MESA_FORMAT_ARGB4444
:
145 return PIPE_FORMAT_B4G4R4A4_UNORM
;
146 case MESA_FORMAT_RGB565
:
147 return PIPE_FORMAT_B5G6R5_UNORM
;
148 case MESA_FORMAT_AL88
:
149 return PIPE_FORMAT_L8A8_UNORM
;
151 return PIPE_FORMAT_A8_UNORM
;
153 return PIPE_FORMAT_L8_UNORM
;
155 return PIPE_FORMAT_I8_UNORM
;
156 case MESA_FORMAT_Z16
:
157 return PIPE_FORMAT_Z16_UNORM
;
158 case MESA_FORMAT_Z32
:
159 return PIPE_FORMAT_Z32_UNORM
;
160 case MESA_FORMAT_Z24_S8
:
161 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
162 case MESA_FORMAT_S8_Z24
:
163 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
164 case MESA_FORMAT_Z24_X8
:
165 return PIPE_FORMAT_X8Z24_UNORM
;
166 case MESA_FORMAT_X8_Z24
:
167 return PIPE_FORMAT_Z24X8_UNORM
;
168 case MESA_FORMAT_YCBCR
:
169 return PIPE_FORMAT_UYVY
;
170 #if FEATURE_texture_s3tc
171 case MESA_FORMAT_RGB_DXT1
:
172 return PIPE_FORMAT_DXT1_RGB
;
173 case MESA_FORMAT_RGBA_DXT1
:
174 return PIPE_FORMAT_DXT1_RGBA
;
175 case MESA_FORMAT_RGBA_DXT3
:
176 return PIPE_FORMAT_DXT3_RGBA
;
177 case MESA_FORMAT_RGBA_DXT5
:
178 return PIPE_FORMAT_DXT5_RGBA
;
179 #if FEATURE_EXT_texture_sRGB
180 case MESA_FORMAT_SRGB_DXT1
:
181 return PIPE_FORMAT_DXT1_SRGB
;
182 case MESA_FORMAT_SRGBA_DXT1
:
183 return PIPE_FORMAT_DXT1_SRGBA
;
184 case MESA_FORMAT_SRGBA_DXT3
:
185 return PIPE_FORMAT_DXT3_SRGBA
;
186 case MESA_FORMAT_SRGBA_DXT5
:
187 return PIPE_FORMAT_DXT5_SRGBA
;
190 #if FEATURE_EXT_texture_sRGB
191 case MESA_FORMAT_SLA8
:
192 return PIPE_FORMAT_L8A8_SRGB
;
193 case MESA_FORMAT_SL8
:
194 return PIPE_FORMAT_L8_SRGB
;
195 case MESA_FORMAT_SRGB8
:
196 return PIPE_FORMAT_R8G8B8_SRGB
;
197 case MESA_FORMAT_SRGBA8
:
198 return PIPE_FORMAT_A8B8G8R8_SRGB
;
199 case MESA_FORMAT_SARGB8
:
200 return PIPE_FORMAT_B8G8R8A8_SRGB
;
204 return PIPE_FORMAT_NONE
;
210 * Translate Gallium format to Mesa format.
213 st_pipe_format_to_mesa_format(enum pipe_format format
)
216 case PIPE_FORMAT_A8B8G8R8_UNORM
:
217 return MESA_FORMAT_RGBA8888
;
218 case PIPE_FORMAT_R8G8B8A8_UNORM
:
219 return MESA_FORMAT_RGBA8888_REV
;
220 case PIPE_FORMAT_B8G8R8A8_UNORM
:
221 return MESA_FORMAT_ARGB8888
;
222 case PIPE_FORMAT_A8R8G8B8_UNORM
:
223 return MESA_FORMAT_ARGB8888_REV
;
224 case PIPE_FORMAT_B8G8R8X8_UNORM
:
225 return MESA_FORMAT_XRGB8888
;
226 case PIPE_FORMAT_X8R8G8B8_UNORM
:
227 return MESA_FORMAT_XRGB8888_REV
;
228 case PIPE_FORMAT_B5G5R5A1_UNORM
:
229 return MESA_FORMAT_ARGB1555
;
230 case PIPE_FORMAT_B4G4R4A4_UNORM
:
231 return MESA_FORMAT_ARGB4444
;
232 case PIPE_FORMAT_B5G6R5_UNORM
:
233 return MESA_FORMAT_RGB565
;
234 case PIPE_FORMAT_L8A8_UNORM
:
235 return MESA_FORMAT_AL88
;
236 case PIPE_FORMAT_A8_UNORM
:
237 return MESA_FORMAT_A8
;
238 case PIPE_FORMAT_L8_UNORM
:
239 return MESA_FORMAT_L8
;
240 case PIPE_FORMAT_I8_UNORM
:
241 return MESA_FORMAT_I8
;
242 case PIPE_FORMAT_S8_USCALED
:
243 return MESA_FORMAT_S8
;
245 case PIPE_FORMAT_R16G16B16A16_SNORM
:
246 return MESA_FORMAT_SIGNED_RGBA_16
;
248 case PIPE_FORMAT_Z16_UNORM
:
249 return MESA_FORMAT_Z16
;
250 case PIPE_FORMAT_Z32_UNORM
:
251 return MESA_FORMAT_Z32
;
252 case PIPE_FORMAT_S8_USCALED_Z24_UNORM
:
253 return MESA_FORMAT_Z24_S8
;
254 case PIPE_FORMAT_X8Z24_UNORM
:
255 return MESA_FORMAT_Z24_X8
;
256 case PIPE_FORMAT_Z24X8_UNORM
:
257 return MESA_FORMAT_X8_Z24
;
258 case PIPE_FORMAT_Z24_UNORM_S8_USCALED
:
259 return MESA_FORMAT_S8_Z24
;
261 case PIPE_FORMAT_UYVY
:
262 return MESA_FORMAT_YCBCR
;
263 case PIPE_FORMAT_YUYV
:
264 return MESA_FORMAT_YCBCR_REV
;
266 #if FEATURE_texture_s3tc
267 case PIPE_FORMAT_DXT1_RGB
:
268 return MESA_FORMAT_RGB_DXT1
;
269 case PIPE_FORMAT_DXT1_RGBA
:
270 return MESA_FORMAT_RGBA_DXT1
;
271 case PIPE_FORMAT_DXT3_RGBA
:
272 return MESA_FORMAT_RGBA_DXT3
;
273 case PIPE_FORMAT_DXT5_RGBA
:
274 return MESA_FORMAT_RGBA_DXT5
;
275 #if FEATURE_EXT_texture_sRGB
276 case PIPE_FORMAT_DXT1_SRGB
:
277 return MESA_FORMAT_SRGB_DXT1
;
278 case PIPE_FORMAT_DXT1_SRGBA
:
279 return MESA_FORMAT_SRGBA_DXT1
;
280 case PIPE_FORMAT_DXT3_SRGBA
:
281 return MESA_FORMAT_SRGBA_DXT3
;
282 case PIPE_FORMAT_DXT5_SRGBA
:
283 return MESA_FORMAT_SRGBA_DXT5
;
287 #if FEATURE_EXT_texture_sRGB
288 case PIPE_FORMAT_L8A8_SRGB
:
289 return MESA_FORMAT_SLA8
;
290 case PIPE_FORMAT_L8_SRGB
:
291 return MESA_FORMAT_SL8
;
292 case PIPE_FORMAT_R8G8B8_SRGB
:
293 return MESA_FORMAT_SRGB8
;
294 case PIPE_FORMAT_A8B8G8R8_SRGB
:
295 return MESA_FORMAT_SRGBA8
;
296 case PIPE_FORMAT_B8G8R8A8_SRGB
:
297 return MESA_FORMAT_SARGB8
;
301 return MESA_FORMAT_NONE
;
307 * Return first supported format from the given list.
309 static enum pipe_format
310 find_supported_format(struct pipe_screen
*screen
,
311 const enum pipe_format formats
[],
313 enum pipe_texture_target target
,
318 for (i
= 0; i
< num_formats
; i
++) {
319 if (screen
->is_format_supported(screen
, formats
[i
], target
,
320 tex_usage
, geom_flags
)) {
324 return PIPE_FORMAT_NONE
;
329 * Find an RGBA format supported by the context/winsys.
331 static enum pipe_format
332 default_rgba_format(struct pipe_screen
*screen
,
333 enum pipe_texture_target target
,
337 static const enum pipe_format colorFormats
[] = {
338 PIPE_FORMAT_B8G8R8A8_UNORM
,
339 PIPE_FORMAT_A8R8G8B8_UNORM
,
340 PIPE_FORMAT_A8B8G8R8_UNORM
,
341 PIPE_FORMAT_B5G6R5_UNORM
343 return find_supported_format(screen
, colorFormats
, Elements(colorFormats
),
344 target
, tex_usage
, geom_flags
);
349 * Find an RGB format supported by the context/winsys.
351 static enum pipe_format
352 default_rgb_format(struct pipe_screen
*screen
,
353 enum pipe_texture_target target
,
357 static const enum pipe_format colorFormats
[] = {
358 PIPE_FORMAT_B8G8R8X8_UNORM
,
359 PIPE_FORMAT_X8R8G8B8_UNORM
,
360 PIPE_FORMAT_X8B8G8R8_UNORM
,
361 PIPE_FORMAT_B8G8R8A8_UNORM
,
362 PIPE_FORMAT_A8R8G8B8_UNORM
,
363 PIPE_FORMAT_A8B8G8R8_UNORM
,
364 PIPE_FORMAT_B5G6R5_UNORM
366 return find_supported_format(screen
, colorFormats
, Elements(colorFormats
),
367 target
, tex_usage
, geom_flags
);
371 * Find an sRGBA format supported by the context/winsys.
373 static enum pipe_format
374 default_srgba_format(struct pipe_screen
*screen
,
375 enum pipe_texture_target target
,
379 static const enum pipe_format colorFormats
[] = {
380 PIPE_FORMAT_B8G8R8A8_SRGB
,
381 PIPE_FORMAT_A8R8G8B8_SRGB
,
382 PIPE_FORMAT_A8B8G8R8_SRGB
,
384 return find_supported_format(screen
, colorFormats
, Elements(colorFormats
),
385 target
, tex_usage
, geom_flags
);
390 * Given an OpenGL internalFormat value for a texture or surface, return
391 * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
392 * \param target one of PIPE_TEXTURE_x
393 * \param tex_usage either PIPE_BIND_RENDER_TARGET
394 * or PIPE_BIND_SAMPLER_VIEW
397 st_choose_format(struct pipe_screen
*screen
, GLenum internalFormat
,
398 enum pipe_texture_target target
, unsigned tex_usage
)
400 unsigned geom_flags
= 0;
402 switch (internalFormat
) {
405 case GL_COMPRESSED_RGBA
:
409 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
412 case GL_COMPRESSED_RGB
:
413 return default_rgb_format( screen
, target
, tex_usage
, geom_flags
);
415 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
419 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B4G4R4A4_UNORM
, target
, tex_usage
, geom_flags
))
420 return PIPE_FORMAT_B4G4R4A4_UNORM
;
421 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
424 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G5R5A1_UNORM
, target
, tex_usage
, geom_flags
))
425 return PIPE_FORMAT_B5G5R5A1_UNORM
;
426 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
432 return default_rgb_format( screen
, target
, tex_usage
, geom_flags
);
437 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G6R5_UNORM
, target
, tex_usage
, geom_flags
))
438 return PIPE_FORMAT_B5G6R5_UNORM
;
439 if (screen
->is_format_supported( screen
, PIPE_FORMAT_B5G5R5A1_UNORM
, target
, tex_usage
, geom_flags
))
440 return PIPE_FORMAT_B5G5R5A1_UNORM
;
441 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
448 case GL_COMPRESSED_ALPHA
:
449 if (screen
->is_format_supported( screen
, PIPE_FORMAT_A8_UNORM
, target
, tex_usage
, geom_flags
))
450 return PIPE_FORMAT_A8_UNORM
;
451 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
459 case GL_COMPRESSED_LUMINANCE
:
460 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8_UNORM
, target
, tex_usage
, geom_flags
))
461 return PIPE_FORMAT_L8_UNORM
;
462 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
465 case GL_LUMINANCE_ALPHA
:
466 case GL_LUMINANCE4_ALPHA4
:
467 case GL_LUMINANCE6_ALPHA2
:
468 case GL_LUMINANCE8_ALPHA8
:
469 case GL_LUMINANCE12_ALPHA4
:
470 case GL_LUMINANCE12_ALPHA12
:
471 case GL_LUMINANCE16_ALPHA16
:
472 case GL_COMPRESSED_LUMINANCE_ALPHA
:
473 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8A8_UNORM
, target
, tex_usage
, geom_flags
))
474 return PIPE_FORMAT_L8A8_UNORM
;
475 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
482 case GL_COMPRESSED_INTENSITY
:
483 if (screen
->is_format_supported( screen
, PIPE_FORMAT_I8_UNORM
, target
, tex_usage
, geom_flags
))
484 return PIPE_FORMAT_I8_UNORM
;
485 return default_rgba_format( screen
, target
, tex_usage
, geom_flags
);
488 if (screen
->is_format_supported(screen
, PIPE_FORMAT_UYVY
,
489 target
, tex_usage
, geom_flags
)) {
490 return PIPE_FORMAT_UYVY
;
492 if (screen
->is_format_supported(screen
, PIPE_FORMAT_YUYV
,
493 target
, tex_usage
, geom_flags
)) {
494 return PIPE_FORMAT_YUYV
;
496 return PIPE_FORMAT_NONE
;
500 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
501 return PIPE_FORMAT_DXT1_RGB
;
503 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
504 return PIPE_FORMAT_DXT1_RGBA
;
508 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
509 return PIPE_FORMAT_DXT3_RGBA
;
511 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
512 return PIPE_FORMAT_DXT5_RGBA
;
515 case GL_COMPRESSED_RGB_FXT1_3DFX
:
516 return PIPE_FORMAT_RGB_FXT1
;
517 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
518 return PIPE_FORMAT_RGB_FXT1
;
521 case GL_DEPTH_COMPONENT16
:
522 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z16_UNORM
, target
, tex_usage
, geom_flags
))
523 return PIPE_FORMAT_Z16_UNORM
;
525 case GL_DEPTH_COMPONENT24
:
526 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z24_UNORM_S8_USCALED
, target
, tex_usage
, geom_flags
))
527 return PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
528 if (screen
->is_format_supported( screen
, PIPE_FORMAT_S8_USCALED_Z24_UNORM
, target
, tex_usage
, geom_flags
))
529 return PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
531 case GL_DEPTH_COMPONENT32
:
532 if (screen
->is_format_supported( screen
, PIPE_FORMAT_Z32_UNORM
, target
, tex_usage
, geom_flags
))
533 return PIPE_FORMAT_Z32_UNORM
;
535 case GL_DEPTH_COMPONENT
:
537 static const enum pipe_format formats
[] = {
538 PIPE_FORMAT_Z16_UNORM
,
539 PIPE_FORMAT_Z32_UNORM
,
540 PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
541 PIPE_FORMAT_S8_USCALED_Z24_UNORM
543 return find_supported_format(screen
, formats
, Elements(formats
),
544 target
, tex_usage
, geom_flags
);
547 case GL_STENCIL_INDEX
:
548 case GL_STENCIL_INDEX1_EXT
:
549 case GL_STENCIL_INDEX4_EXT
:
550 case GL_STENCIL_INDEX8_EXT
:
551 case GL_STENCIL_INDEX16_EXT
:
553 static const enum pipe_format formats
[] = {
554 PIPE_FORMAT_S8_USCALED
,
555 PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
556 PIPE_FORMAT_S8_USCALED_Z24_UNORM
558 return find_supported_format(screen
, formats
, Elements(formats
),
559 target
, tex_usage
, geom_flags
);
562 case GL_DEPTH_STENCIL_EXT
:
563 case GL_DEPTH24_STENCIL8_EXT
:
565 static const enum pipe_format formats
[] = {
566 PIPE_FORMAT_Z24_UNORM_S8_USCALED
,
567 PIPE_FORMAT_S8_USCALED_Z24_UNORM
569 return find_supported_format(screen
, formats
, Elements(formats
),
570 target
, tex_usage
, geom_flags
);
575 case GL_COMPRESSED_SRGB_EXT
:
576 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
577 case GL_SRGB_ALPHA_EXT
:
578 case GL_SRGB8_ALPHA8_EXT
:
579 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
580 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
581 return PIPE_FORMAT_DXT1_SRGB
;
582 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
583 return PIPE_FORMAT_DXT1_SRGBA
;
584 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
585 return PIPE_FORMAT_DXT3_SRGBA
;
586 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
587 return PIPE_FORMAT_DXT5_SRGBA
;
589 case GL_SLUMINANCE_ALPHA_EXT
:
590 case GL_SLUMINANCE8_ALPHA8_EXT
:
591 case GL_COMPRESSED_SLUMINANCE_EXT
:
592 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
593 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8A8_SRGB
, target
, tex_usage
, geom_flags
))
594 return PIPE_FORMAT_L8A8_SRGB
;
595 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
597 case GL_SLUMINANCE_EXT
:
598 case GL_SLUMINANCE8_EXT
:
599 if (screen
->is_format_supported( screen
, PIPE_FORMAT_L8_SRGB
, target
, tex_usage
, geom_flags
))
600 return PIPE_FORMAT_L8_SRGB
;
601 return default_srgba_format( screen
, target
, tex_usage
, geom_flags
);
604 return PIPE_FORMAT_NONE
;
610 is_depth_or_stencil_format(GLenum internalFormat
)
612 switch (internalFormat
) {
613 case GL_DEPTH_COMPONENT
:
614 case GL_DEPTH_COMPONENT16
:
615 case GL_DEPTH_COMPONENT24
:
616 case GL_DEPTH_COMPONENT32
:
617 case GL_STENCIL_INDEX
:
618 case GL_STENCIL_INDEX1_EXT
:
619 case GL_STENCIL_INDEX4_EXT
:
620 case GL_STENCIL_INDEX8_EXT
:
621 case GL_STENCIL_INDEX16_EXT
:
622 case GL_DEPTH_STENCIL_EXT
:
623 case GL_DEPTH24_STENCIL8_EXT
:
631 * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
634 st_choose_renderbuffer_format(struct pipe_screen
*screen
,
635 GLenum internalFormat
)
638 if (is_depth_or_stencil_format(internalFormat
))
639 usage
= PIPE_BIND_DEPTH_STENCIL
;
641 usage
= PIPE_BIND_RENDER_TARGET
;
642 return st_choose_format(screen
, internalFormat
, PIPE_TEXTURE_2D
, usage
);
647 * Called via ctx->Driver.chooseTextureFormat().
650 st_ChooseTextureFormat(GLcontext
*ctx
, GLint internalFormat
,
651 GLenum format
, GLenum type
)
653 struct pipe_screen
*screen
= st_context(ctx
)->pipe
->screen
;
654 enum pipe_format pFormat
;
660 /* GL textures may wind up being render targets, but we don't know
661 * that in advance. Specify potential render target flags now.
663 if (_mesa_is_depth_format(internalFormat
) ||
664 _mesa_is_depthstencil_format(internalFormat
))
665 bindings
= PIPE_BIND_SAMPLER_VIEW
| PIPE_BIND_DEPTH_STENCIL
;
667 bindings
= PIPE_BIND_SAMPLER_VIEW
| PIPE_BIND_RENDER_TARGET
;
669 pFormat
= st_choose_format(screen
, internalFormat
,
670 PIPE_TEXTURE_2D
, bindings
);
672 if (pFormat
== PIPE_FORMAT_NONE
) {
673 /* try choosing format again, this time without render target bindings */
674 pFormat
= st_choose_format(screen
, internalFormat
,
675 PIPE_TEXTURE_2D
, PIPE_BIND_SAMPLER_VIEW
);
678 if (pFormat
== PIPE_FORMAT_NONE
) {
680 return MESA_FORMAT_NONE
;
683 return st_pipe_format_to_mesa_format(pFormat
);
688 * Test if a gallium format is equivalent to a GL format/type.
691 st_equal_formats(enum pipe_format pFormat
, GLenum format
, GLenum type
)
694 case PIPE_FORMAT_A8B8G8R8_UNORM
:
695 return format
== GL_RGBA
&& type
== GL_UNSIGNED_BYTE
;
696 case PIPE_FORMAT_A8R8G8B8_UNORM
:
697 return format
== GL_BGRA
&& type
== GL_UNSIGNED_BYTE
;
698 case PIPE_FORMAT_B5G6R5_UNORM
:
699 return format
== GL_RGB
&& type
== GL_UNSIGNED_SHORT_5_6_5
;
700 /* XXX more combos... */