1 /**************************************************************************
2  *
3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4  * Copyright (c) 2008-2010 VMware, Inc.
5  * All Rights Reserved.
6  *
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:
14  *
15  * The above copyright notice and this permission notice (including the
16  * next paragraph) shall be included in all copies or substantial portions
17  * of the Software.
18  *
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.
26  *
27  **************************************************************************/
28 
29 
30 /**
31  * Mesa / Gallium format conversion and format selection code.
32  * \author Brian Paul
33  */
34 
35 #include "main/imports.h"
36 #include "main/context.h"
37 #include "main/glformats.h"
38 #include "main/texstore.h"
39 #include "main/image.h"
40 #include "main/macros.h"
41 #include "main/mfeatures.h"
42 
43 #include "pipe/p_context.h"
44 #include "pipe/p_defines.h"
45 #include "pipe/p_screen.h"
46 #include "util/u_format.h"
47 #include "st_context.h"
48 #include "st_format.h"
49 
50 
51 /**
52  * Translate Mesa format to Gallium format.
53  */
54 enum pipe_format
st_mesa_format_to_pipe_format(gl_format mesaFormat)55 st_mesa_format_to_pipe_format(gl_format mesaFormat)
56 {
57    switch (mesaFormat) {
58    case MESA_FORMAT_RGBA8888:
59       return PIPE_FORMAT_A8B8G8R8_UNORM;
60    case MESA_FORMAT_RGBA8888_REV:
61       return PIPE_FORMAT_R8G8B8A8_UNORM;
62    case MESA_FORMAT_ARGB8888:
63       return PIPE_FORMAT_B8G8R8A8_UNORM;
64    case MESA_FORMAT_ARGB8888_REV:
65       return PIPE_FORMAT_A8R8G8B8_UNORM;
66    case MESA_FORMAT_RGBX8888:
67       return PIPE_FORMAT_X8B8G8R8_UNORM;
68    case MESA_FORMAT_RGBX8888_REV:
69       return PIPE_FORMAT_R8G8B8X8_UNORM;
70    case MESA_FORMAT_XRGB8888:
71       return PIPE_FORMAT_B8G8R8X8_UNORM;
72    case MESA_FORMAT_XRGB8888_REV:
73       return PIPE_FORMAT_X8R8G8B8_UNORM;
74    case MESA_FORMAT_ARGB1555:
75       return PIPE_FORMAT_B5G5R5A1_UNORM;
76    case MESA_FORMAT_ARGB4444:
77       return PIPE_FORMAT_B4G4R4A4_UNORM;
78    case MESA_FORMAT_RGB565:
79       return PIPE_FORMAT_B5G6R5_UNORM;
80    case MESA_FORMAT_RGB332:
81       return PIPE_FORMAT_B2G3R3_UNORM;
82    case MESA_FORMAT_ARGB2101010:
83       return PIPE_FORMAT_B10G10R10A2_UNORM;
84    case MESA_FORMAT_AL44:
85       return PIPE_FORMAT_L4A4_UNORM;
86    case MESA_FORMAT_AL88:
87       return PIPE_FORMAT_L8A8_UNORM;
88    case MESA_FORMAT_AL1616:
89       return PIPE_FORMAT_L16A16_UNORM;
90    case MESA_FORMAT_A8:
91       return PIPE_FORMAT_A8_UNORM;
92    case MESA_FORMAT_A16:
93       return PIPE_FORMAT_A16_UNORM;
94    case MESA_FORMAT_L8:
95       return PIPE_FORMAT_L8_UNORM;
96    case MESA_FORMAT_L16:
97       return PIPE_FORMAT_L16_UNORM;
98    case MESA_FORMAT_I8:
99       return PIPE_FORMAT_I8_UNORM;
100    case MESA_FORMAT_I16:
101       return PIPE_FORMAT_I16_UNORM;
102    case MESA_FORMAT_Z16:
103       return PIPE_FORMAT_Z16_UNORM;
104    case MESA_FORMAT_Z32:
105       return PIPE_FORMAT_Z32_UNORM;
106    case MESA_FORMAT_Z24_S8:
107       return PIPE_FORMAT_S8_UINT_Z24_UNORM;
108    case MESA_FORMAT_S8_Z24:
109       return PIPE_FORMAT_Z24_UNORM_S8_UINT;
110    case MESA_FORMAT_Z24_X8:
111       return PIPE_FORMAT_X8Z24_UNORM;
112    case MESA_FORMAT_X8_Z24:
113       return PIPE_FORMAT_Z24X8_UNORM;
114    case MESA_FORMAT_S8:
115       return PIPE_FORMAT_S8_UINT;
116    case MESA_FORMAT_Z32_FLOAT:
117       return PIPE_FORMAT_Z32_FLOAT;
118    case MESA_FORMAT_Z32_FLOAT_X24S8:
119       return PIPE_FORMAT_Z32_FLOAT_S8X24_UINT;
120    case MESA_FORMAT_YCBCR:
121       return PIPE_FORMAT_UYVY;
122 #if FEATURE_texture_s3tc
123    case MESA_FORMAT_RGB_DXT1:
124       return PIPE_FORMAT_DXT1_RGB;
125    case MESA_FORMAT_RGBA_DXT1:
126       return PIPE_FORMAT_DXT1_RGBA;
127    case MESA_FORMAT_RGBA_DXT3:
128       return PIPE_FORMAT_DXT3_RGBA;
129    case MESA_FORMAT_RGBA_DXT5:
130       return PIPE_FORMAT_DXT5_RGBA;
131 #if FEATURE_EXT_texture_sRGB
132    case MESA_FORMAT_SRGB_DXT1:
133       return PIPE_FORMAT_DXT1_SRGB;
134    case MESA_FORMAT_SRGBA_DXT1:
135       return PIPE_FORMAT_DXT1_SRGBA;
136    case MESA_FORMAT_SRGBA_DXT3:
137       return PIPE_FORMAT_DXT3_SRGBA;
138    case MESA_FORMAT_SRGBA_DXT5:
139       return PIPE_FORMAT_DXT5_SRGBA;
140 #endif
141 #endif
142 #if FEATURE_EXT_texture_sRGB
143    case MESA_FORMAT_SLA8:
144       return PIPE_FORMAT_L8A8_SRGB;
145    case MESA_FORMAT_SL8:
146       return PIPE_FORMAT_L8_SRGB;
147    case MESA_FORMAT_SRGB8:
148       return PIPE_FORMAT_R8G8B8_SRGB;
149    case MESA_FORMAT_SRGBA8:
150       return PIPE_FORMAT_A8B8G8R8_SRGB;
151    case MESA_FORMAT_SARGB8:
152       return PIPE_FORMAT_B8G8R8A8_SRGB;
153 #endif
154    case MESA_FORMAT_RGBA_FLOAT32:
155       return PIPE_FORMAT_R32G32B32A32_FLOAT;
156    case MESA_FORMAT_RGBA_FLOAT16:
157       return PIPE_FORMAT_R16G16B16A16_FLOAT;
158    case MESA_FORMAT_RGB_FLOAT32:
159       return PIPE_FORMAT_R32G32B32_FLOAT;
160    case MESA_FORMAT_RGB_FLOAT16:
161       return PIPE_FORMAT_R16G16B16_FLOAT;
162    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
163       return PIPE_FORMAT_L32A32_FLOAT;
164    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
165       return PIPE_FORMAT_L16A16_FLOAT;
166    case MESA_FORMAT_LUMINANCE_FLOAT32:
167       return PIPE_FORMAT_L32_FLOAT;
168    case MESA_FORMAT_LUMINANCE_FLOAT16:
169       return PIPE_FORMAT_L16_FLOAT;
170    case MESA_FORMAT_ALPHA_FLOAT32:
171       return PIPE_FORMAT_A32_FLOAT;
172    case MESA_FORMAT_ALPHA_FLOAT16:
173       return PIPE_FORMAT_A16_FLOAT;
174    case MESA_FORMAT_INTENSITY_FLOAT32:
175       return PIPE_FORMAT_I32_FLOAT;
176    case MESA_FORMAT_INTENSITY_FLOAT16:
177       return PIPE_FORMAT_I16_FLOAT;
178    case MESA_FORMAT_R_FLOAT32:
179       return PIPE_FORMAT_R32_FLOAT;
180    case MESA_FORMAT_R_FLOAT16:
181       return PIPE_FORMAT_R16_FLOAT;
182    case MESA_FORMAT_RG_FLOAT32:
183       return PIPE_FORMAT_R32G32_FLOAT;
184    case MESA_FORMAT_RG_FLOAT16:
185       return PIPE_FORMAT_R16G16_FLOAT;
186 
187    case MESA_FORMAT_R8:
188       return PIPE_FORMAT_R8_UNORM;
189    case MESA_FORMAT_R16:
190       return PIPE_FORMAT_R16_UNORM;
191    case MESA_FORMAT_GR88:
192       return PIPE_FORMAT_R8G8_UNORM;
193    case MESA_FORMAT_RG1616:
194       return PIPE_FORMAT_R16G16_UNORM;
195    case MESA_FORMAT_RGBA_16:
196       return PIPE_FORMAT_R16G16B16A16_UNORM;
197 
198    /* signed int formats */
199    case MESA_FORMAT_ALPHA_UINT8:
200       return PIPE_FORMAT_A8_UINT;
201    case MESA_FORMAT_ALPHA_UINT16:
202       return PIPE_FORMAT_A16_UINT;
203    case MESA_FORMAT_ALPHA_UINT32:
204       return PIPE_FORMAT_A32_UINT;
205 
206    case MESA_FORMAT_ALPHA_INT8:
207       return PIPE_FORMAT_A8_SINT;
208    case MESA_FORMAT_ALPHA_INT16:
209       return PIPE_FORMAT_A16_SINT;
210    case MESA_FORMAT_ALPHA_INT32:
211       return PIPE_FORMAT_A32_SINT;
212 
213    case MESA_FORMAT_INTENSITY_UINT8:
214       return PIPE_FORMAT_I8_UINT;
215    case MESA_FORMAT_INTENSITY_UINT16:
216       return PIPE_FORMAT_I16_UINT;
217    case MESA_FORMAT_INTENSITY_UINT32:
218       return PIPE_FORMAT_I32_UINT;
219 
220    case MESA_FORMAT_INTENSITY_INT8:
221       return PIPE_FORMAT_I8_SINT;
222    case MESA_FORMAT_INTENSITY_INT16:
223       return PIPE_FORMAT_I16_SINT;
224    case MESA_FORMAT_INTENSITY_INT32:
225       return PIPE_FORMAT_I32_SINT;
226 
227    case MESA_FORMAT_LUMINANCE_UINT8:
228       return PIPE_FORMAT_L8_UINT;
229    case MESA_FORMAT_LUMINANCE_UINT16:
230       return PIPE_FORMAT_L16_UINT;
231    case MESA_FORMAT_LUMINANCE_UINT32:
232       return PIPE_FORMAT_L32_UINT;
233 
234    case MESA_FORMAT_LUMINANCE_INT8:
235       return PIPE_FORMAT_L8_SINT;
236    case MESA_FORMAT_LUMINANCE_INT16:
237       return PIPE_FORMAT_L16_SINT;
238    case MESA_FORMAT_LUMINANCE_INT32:
239       return PIPE_FORMAT_L32_SINT;
240 
241    case MESA_FORMAT_LUMINANCE_ALPHA_UINT8:
242       return PIPE_FORMAT_L8A8_UINT;
243    case MESA_FORMAT_LUMINANCE_ALPHA_UINT16:
244       return PIPE_FORMAT_L16A16_UINT;
245    case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
246       return PIPE_FORMAT_L32A32_UINT;
247 
248    case MESA_FORMAT_LUMINANCE_ALPHA_INT8:
249       return PIPE_FORMAT_L8A8_SINT;
250    case MESA_FORMAT_LUMINANCE_ALPHA_INT16:
251       return PIPE_FORMAT_L16A16_SINT;
252    case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
253       return PIPE_FORMAT_L32A32_SINT;
254 
255    case MESA_FORMAT_R_INT8:
256       return PIPE_FORMAT_R8_SINT;
257    case MESA_FORMAT_RG_INT8:
258       return PIPE_FORMAT_R8G8_SINT;
259    case MESA_FORMAT_RGB_INT8:
260       return PIPE_FORMAT_R8G8B8_SINT;
261    case MESA_FORMAT_RGBA_INT8:
262       return PIPE_FORMAT_R8G8B8A8_SINT;
263    case MESA_FORMAT_R_INT16:
264       return PIPE_FORMAT_R16_SINT;
265    case MESA_FORMAT_RG_INT16:
266       return PIPE_FORMAT_R16G16_SINT;
267    case MESA_FORMAT_RGB_INT16:
268       return PIPE_FORMAT_R16G16B16_SINT;
269    case MESA_FORMAT_RGBA_INT16:
270       return PIPE_FORMAT_R16G16B16A16_SINT;
271    case MESA_FORMAT_R_INT32:
272       return PIPE_FORMAT_R32_SINT;
273    case MESA_FORMAT_RG_INT32:
274       return PIPE_FORMAT_R32G32_SINT;
275    case MESA_FORMAT_RGB_INT32:
276       return PIPE_FORMAT_R32G32B32_SINT;
277    case MESA_FORMAT_RGBA_INT32:
278       return PIPE_FORMAT_R32G32B32A32_SINT;
279 
280    /* unsigned int formats */
281    case MESA_FORMAT_R_UINT8:
282       return PIPE_FORMAT_R8_UINT;
283    case MESA_FORMAT_RG_UINT8:
284       return PIPE_FORMAT_R8G8_UINT;
285    case MESA_FORMAT_RGB_UINT8:
286       return PIPE_FORMAT_R8G8B8_UINT;
287    case MESA_FORMAT_RGBA_UINT8:
288       return PIPE_FORMAT_R8G8B8A8_UINT;
289    case MESA_FORMAT_R_UINT16:
290       return PIPE_FORMAT_R16_UINT;
291    case MESA_FORMAT_RG_UINT16:
292       return PIPE_FORMAT_R16G16_UINT;
293    case MESA_FORMAT_RGB_UINT16:
294       return PIPE_FORMAT_R16G16B16_UINT;
295    case MESA_FORMAT_RGBA_UINT16:
296       return PIPE_FORMAT_R16G16B16A16_UINT;
297    case MESA_FORMAT_R_UINT32:
298       return PIPE_FORMAT_R32_UINT;
299    case MESA_FORMAT_RG_UINT32:
300       return PIPE_FORMAT_R32G32_UINT;
301    case MESA_FORMAT_RGB_UINT32:
302       return PIPE_FORMAT_R32G32B32_UINT;
303    case MESA_FORMAT_RGBA_UINT32:
304       return PIPE_FORMAT_R32G32B32A32_UINT;
305 
306    case MESA_FORMAT_RED_RGTC1:
307       return PIPE_FORMAT_RGTC1_UNORM;
308    case MESA_FORMAT_SIGNED_RED_RGTC1:
309       return PIPE_FORMAT_RGTC1_SNORM;
310    case MESA_FORMAT_RG_RGTC2:
311       return PIPE_FORMAT_RGTC2_UNORM;
312    case MESA_FORMAT_SIGNED_RG_RGTC2:
313       return PIPE_FORMAT_RGTC2_SNORM;
314 
315    case MESA_FORMAT_L_LATC1:
316       return PIPE_FORMAT_LATC1_UNORM;
317    case MESA_FORMAT_SIGNED_L_LATC1:
318       return PIPE_FORMAT_LATC1_SNORM;
319    case MESA_FORMAT_LA_LATC2:
320       return PIPE_FORMAT_LATC2_UNORM;
321    case MESA_FORMAT_SIGNED_LA_LATC2:
322       return PIPE_FORMAT_LATC2_SNORM;
323 
324    case MESA_FORMAT_ETC1_RGB8:
325       return PIPE_FORMAT_ETC1_RGB8;
326 
327    /* signed normalized formats */
328    case MESA_FORMAT_SIGNED_R8:
329       return PIPE_FORMAT_R8_SNORM;
330    case MESA_FORMAT_SIGNED_RG88_REV:
331       return PIPE_FORMAT_R8G8_SNORM;
332    case MESA_FORMAT_SIGNED_RGBA8888_REV:
333       return PIPE_FORMAT_R8G8B8A8_SNORM;
334 
335    case MESA_FORMAT_SIGNED_A8:
336       return PIPE_FORMAT_A8_SNORM;
337    case MESA_FORMAT_SIGNED_L8:
338       return PIPE_FORMAT_L8_SNORM;
339    case MESA_FORMAT_SIGNED_AL88:
340       return PIPE_FORMAT_L8A8_SNORM;
341    case MESA_FORMAT_SIGNED_I8:
342       return PIPE_FORMAT_I8_SNORM;
343 
344    case MESA_FORMAT_SIGNED_R16:
345       return PIPE_FORMAT_R16_SNORM;
346    case MESA_FORMAT_SIGNED_GR1616:
347       return PIPE_FORMAT_R16G16_SNORM;
348    case MESA_FORMAT_SIGNED_RGBA_16:
349       return PIPE_FORMAT_R16G16B16A16_SNORM;
350 
351    case MESA_FORMAT_SIGNED_A16:
352       return PIPE_FORMAT_A16_SNORM;
353    case MESA_FORMAT_SIGNED_L16:
354       return PIPE_FORMAT_L16_SNORM;
355    case MESA_FORMAT_SIGNED_AL1616:
356       return PIPE_FORMAT_L16A16_SNORM;
357    case MESA_FORMAT_SIGNED_I16:
358       return PIPE_FORMAT_I16_SNORM;
359 
360    case MESA_FORMAT_RGB9_E5_FLOAT:
361       return PIPE_FORMAT_R9G9B9E5_FLOAT;
362    case MESA_FORMAT_R11_G11_B10_FLOAT:
363       return PIPE_FORMAT_R11G11B10_FLOAT;
364    case MESA_FORMAT_ARGB2101010_UINT:
365       return PIPE_FORMAT_B10G10R10A2_UINT;
366    default:
367       assert(0);
368       return PIPE_FORMAT_NONE;
369    }
370 }
371 
372 
373 /**
374  * Translate Gallium format to Mesa format.
375  */
376 gl_format
st_pipe_format_to_mesa_format(enum pipe_format format)377 st_pipe_format_to_mesa_format(enum pipe_format format)
378 {
379    switch (format) {
380    case PIPE_FORMAT_A8B8G8R8_UNORM:
381       return MESA_FORMAT_RGBA8888;
382    case PIPE_FORMAT_R8G8B8A8_UNORM:
383       return MESA_FORMAT_RGBA8888_REV;
384    case PIPE_FORMAT_B8G8R8A8_UNORM:
385       return MESA_FORMAT_ARGB8888;
386    case PIPE_FORMAT_A8R8G8B8_UNORM:
387       return MESA_FORMAT_ARGB8888_REV;
388    case PIPE_FORMAT_X8B8G8R8_UNORM:
389       return MESA_FORMAT_RGBX8888;
390    case PIPE_FORMAT_R8G8B8X8_UNORM:
391       return MESA_FORMAT_RGBX8888_REV;
392    case PIPE_FORMAT_B8G8R8X8_UNORM:
393       return MESA_FORMAT_XRGB8888;
394    case PIPE_FORMAT_X8R8G8B8_UNORM:
395       return MESA_FORMAT_XRGB8888_REV;
396    case PIPE_FORMAT_B5G5R5A1_UNORM:
397       return MESA_FORMAT_ARGB1555;
398    case PIPE_FORMAT_B4G4R4A4_UNORM:
399       return MESA_FORMAT_ARGB4444;
400    case PIPE_FORMAT_B5G6R5_UNORM:
401       return MESA_FORMAT_RGB565;
402    case PIPE_FORMAT_B2G3R3_UNORM:
403       return MESA_FORMAT_RGB332;
404    case PIPE_FORMAT_B10G10R10A2_UNORM:
405       return MESA_FORMAT_ARGB2101010;
406    case PIPE_FORMAT_L4A4_UNORM:
407       return MESA_FORMAT_AL44;
408    case PIPE_FORMAT_L8A8_UNORM:
409       return MESA_FORMAT_AL88;
410    case PIPE_FORMAT_L16A16_UNORM:
411       return MESA_FORMAT_AL1616;
412    case PIPE_FORMAT_A8_UNORM:
413       return MESA_FORMAT_A8;
414    case PIPE_FORMAT_A16_UNORM:
415       return MESA_FORMAT_A16;
416    case PIPE_FORMAT_L8_UNORM:
417       return MESA_FORMAT_L8;
418    case PIPE_FORMAT_L16_UNORM:
419       return MESA_FORMAT_L16;
420    case PIPE_FORMAT_I8_UNORM:
421       return MESA_FORMAT_I8;
422    case PIPE_FORMAT_I16_UNORM:
423       return MESA_FORMAT_I16;
424    case PIPE_FORMAT_S8_UINT:
425       return MESA_FORMAT_S8;
426 
427    case PIPE_FORMAT_R16G16B16A16_UNORM:
428       return MESA_FORMAT_RGBA_16;
429 
430    case PIPE_FORMAT_Z16_UNORM:
431       return MESA_FORMAT_Z16;
432    case PIPE_FORMAT_Z32_UNORM:
433       return MESA_FORMAT_Z32;
434    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
435       return MESA_FORMAT_Z24_S8;
436    case PIPE_FORMAT_X8Z24_UNORM:
437       return MESA_FORMAT_Z24_X8;
438    case PIPE_FORMAT_Z24X8_UNORM:
439       return MESA_FORMAT_X8_Z24;
440    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
441       return MESA_FORMAT_S8_Z24;
442    case PIPE_FORMAT_Z32_FLOAT:
443       return MESA_FORMAT_Z32_FLOAT;
444    case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
445       return MESA_FORMAT_Z32_FLOAT_X24S8;
446 
447    case PIPE_FORMAT_UYVY:
448       return MESA_FORMAT_YCBCR;
449    case PIPE_FORMAT_YUYV:
450       return MESA_FORMAT_YCBCR_REV;
451 
452 #if FEATURE_texture_s3tc
453    case PIPE_FORMAT_DXT1_RGB:
454       return MESA_FORMAT_RGB_DXT1;
455    case PIPE_FORMAT_DXT1_RGBA:
456       return MESA_FORMAT_RGBA_DXT1;
457    case PIPE_FORMAT_DXT3_RGBA:
458       return MESA_FORMAT_RGBA_DXT3;
459    case PIPE_FORMAT_DXT5_RGBA:
460       return MESA_FORMAT_RGBA_DXT5;
461 #if FEATURE_EXT_texture_sRGB
462    case PIPE_FORMAT_DXT1_SRGB:
463       return MESA_FORMAT_SRGB_DXT1;
464    case PIPE_FORMAT_DXT1_SRGBA:
465       return MESA_FORMAT_SRGBA_DXT1;
466    case PIPE_FORMAT_DXT3_SRGBA:
467       return MESA_FORMAT_SRGBA_DXT3;
468    case PIPE_FORMAT_DXT5_SRGBA:
469       return MESA_FORMAT_SRGBA_DXT5;
470 #endif
471 #endif
472 
473 #if FEATURE_EXT_texture_sRGB
474    case PIPE_FORMAT_L8A8_SRGB:
475       return MESA_FORMAT_SLA8;
476    case PIPE_FORMAT_L8_SRGB:
477       return MESA_FORMAT_SL8;
478    case PIPE_FORMAT_R8G8B8_SRGB:
479       return MESA_FORMAT_SRGB8;
480    case PIPE_FORMAT_A8B8G8R8_SRGB:
481       return MESA_FORMAT_SRGBA8;
482    case PIPE_FORMAT_B8G8R8A8_SRGB:
483       return MESA_FORMAT_SARGB8;
484 #endif
485    case PIPE_FORMAT_R32G32B32A32_FLOAT:
486       return MESA_FORMAT_RGBA_FLOAT32;
487    case PIPE_FORMAT_R16G16B16A16_FLOAT:
488       return MESA_FORMAT_RGBA_FLOAT16;
489    case PIPE_FORMAT_R32G32B32_FLOAT:
490       return MESA_FORMAT_RGB_FLOAT32;
491    case PIPE_FORMAT_R16G16B16_FLOAT:
492       return MESA_FORMAT_RGB_FLOAT16;
493    case PIPE_FORMAT_L32A32_FLOAT:
494       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
495    case PIPE_FORMAT_L16A16_FLOAT:
496       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
497    case PIPE_FORMAT_L32_FLOAT:
498       return MESA_FORMAT_LUMINANCE_FLOAT32;
499    case PIPE_FORMAT_L16_FLOAT:
500       return MESA_FORMAT_LUMINANCE_FLOAT16;
501    case PIPE_FORMAT_A32_FLOAT:
502       return MESA_FORMAT_ALPHA_FLOAT32;
503    case PIPE_FORMAT_A16_FLOAT:
504       return MESA_FORMAT_ALPHA_FLOAT16;
505    case PIPE_FORMAT_I32_FLOAT:
506       return MESA_FORMAT_INTENSITY_FLOAT32;
507    case PIPE_FORMAT_I16_FLOAT:
508       return MESA_FORMAT_INTENSITY_FLOAT16;
509    case PIPE_FORMAT_R32_FLOAT:
510       return MESA_FORMAT_R_FLOAT32;
511    case PIPE_FORMAT_R16_FLOAT:
512       return MESA_FORMAT_R_FLOAT16;
513    case PIPE_FORMAT_R32G32_FLOAT:
514       return MESA_FORMAT_RG_FLOAT32;
515    case PIPE_FORMAT_R16G16_FLOAT:
516       return MESA_FORMAT_RG_FLOAT16;
517 
518    case PIPE_FORMAT_R8_UNORM:
519       return MESA_FORMAT_R8;
520    case PIPE_FORMAT_R16_UNORM:
521       return MESA_FORMAT_R16;
522    case PIPE_FORMAT_R8G8_UNORM:
523       return MESA_FORMAT_GR88;
524    case PIPE_FORMAT_R16G16_UNORM:
525       return MESA_FORMAT_RG1616;
526 
527    case PIPE_FORMAT_A8_UINT:
528       return MESA_FORMAT_ALPHA_UINT8;
529    case PIPE_FORMAT_A16_UINT:
530       return MESA_FORMAT_ALPHA_UINT16;
531    case PIPE_FORMAT_A32_UINT:
532       return MESA_FORMAT_ALPHA_UINT32;
533    case PIPE_FORMAT_A8_SINT:
534       return MESA_FORMAT_ALPHA_INT8;
535    case PIPE_FORMAT_A16_SINT:
536       return MESA_FORMAT_ALPHA_INT16;
537    case PIPE_FORMAT_A32_SINT:
538       return MESA_FORMAT_ALPHA_INT32;
539 
540    case PIPE_FORMAT_I8_UINT:
541       return MESA_FORMAT_INTENSITY_UINT8;
542    case PIPE_FORMAT_I16_UINT:
543       return MESA_FORMAT_INTENSITY_UINT16;
544    case PIPE_FORMAT_I32_UINT:
545       return MESA_FORMAT_INTENSITY_UINT32;
546    case PIPE_FORMAT_I8_SINT:
547       return MESA_FORMAT_INTENSITY_INT8;
548    case PIPE_FORMAT_I16_SINT:
549       return MESA_FORMAT_INTENSITY_INT16;
550    case PIPE_FORMAT_I32_SINT:
551       return MESA_FORMAT_INTENSITY_INT32;
552 
553   case PIPE_FORMAT_L8_UINT:
554       return MESA_FORMAT_LUMINANCE_UINT8;
555    case PIPE_FORMAT_L16_UINT:
556       return MESA_FORMAT_LUMINANCE_UINT16;
557    case PIPE_FORMAT_L32_UINT:
558       return MESA_FORMAT_LUMINANCE_UINT32;
559    case PIPE_FORMAT_L8_SINT:
560       return MESA_FORMAT_LUMINANCE_INT8;
561    case PIPE_FORMAT_L16_SINT:
562       return MESA_FORMAT_LUMINANCE_INT16;
563    case PIPE_FORMAT_L32_SINT:
564       return MESA_FORMAT_LUMINANCE_INT32;
565 
566    case PIPE_FORMAT_L8A8_UINT:
567       return MESA_FORMAT_LUMINANCE_ALPHA_UINT8;
568    case PIPE_FORMAT_L16A16_UINT:
569       return MESA_FORMAT_LUMINANCE_ALPHA_UINT16;
570    case PIPE_FORMAT_L32A32_UINT:
571       return MESA_FORMAT_LUMINANCE_ALPHA_UINT32;
572    case PIPE_FORMAT_L8A8_SINT:
573       return MESA_FORMAT_LUMINANCE_ALPHA_INT8;
574    case PIPE_FORMAT_L16A16_SINT:
575       return MESA_FORMAT_LUMINANCE_ALPHA_INT16;
576    case PIPE_FORMAT_L32A32_SINT:
577       return MESA_FORMAT_LUMINANCE_ALPHA_INT32;
578 
579    case PIPE_FORMAT_R8_SINT:
580       return MESA_FORMAT_R_INT8;
581    case PIPE_FORMAT_R8G8_SINT:
582       return MESA_FORMAT_RG_INT8;
583    case PIPE_FORMAT_R8G8B8_SINT:
584       return MESA_FORMAT_RGB_INT8;
585    case PIPE_FORMAT_R8G8B8A8_SINT:
586       return MESA_FORMAT_RGBA_INT8;
587 
588    case PIPE_FORMAT_R16_SINT:
589       return MESA_FORMAT_R_INT16;
590    case PIPE_FORMAT_R16G16_SINT:
591       return MESA_FORMAT_RG_INT16;
592    case PIPE_FORMAT_R16G16B16_SINT:
593       return MESA_FORMAT_RGB_INT16;
594    case PIPE_FORMAT_R16G16B16A16_SINT:
595       return MESA_FORMAT_RGBA_INT16;
596 
597    case PIPE_FORMAT_R32_SINT:
598       return MESA_FORMAT_R_INT32;
599    case PIPE_FORMAT_R32G32_SINT:
600       return MESA_FORMAT_RG_INT32;
601    case PIPE_FORMAT_R32G32B32_SINT:
602       return MESA_FORMAT_RGB_INT32;
603    case PIPE_FORMAT_R32G32B32A32_SINT:
604       return MESA_FORMAT_RGBA_INT32;
605 
606    /* unsigned int formats */
607    case PIPE_FORMAT_R8_UINT:
608       return MESA_FORMAT_R_UINT8;
609    case PIPE_FORMAT_R8G8_UINT:
610       return MESA_FORMAT_RG_UINT8;
611    case PIPE_FORMAT_R8G8B8_UINT:
612       return MESA_FORMAT_RGB_UINT8;
613    case PIPE_FORMAT_R8G8B8A8_UINT:
614       return MESA_FORMAT_RGBA_UINT8;
615 
616    case PIPE_FORMAT_R16_UINT:
617       return MESA_FORMAT_R_UINT16;
618    case PIPE_FORMAT_R16G16_UINT:
619       return MESA_FORMAT_RG_UINT16;
620    case PIPE_FORMAT_R16G16B16_UINT:
621       return MESA_FORMAT_RGB_UINT16;
622    case PIPE_FORMAT_R16G16B16A16_UINT:
623       return MESA_FORMAT_RGBA_UINT16;
624 
625    case PIPE_FORMAT_R32_UINT:
626       return MESA_FORMAT_R_UINT32;
627    case PIPE_FORMAT_R32G32_UINT:
628       return MESA_FORMAT_RG_UINT32;
629    case PIPE_FORMAT_R32G32B32_UINT:
630       return MESA_FORMAT_RGB_UINT32;
631    case PIPE_FORMAT_R32G32B32A32_UINT:
632       return MESA_FORMAT_RGBA_UINT32;
633 
634    case PIPE_FORMAT_RGTC1_UNORM:
635       return MESA_FORMAT_RED_RGTC1;
636    case PIPE_FORMAT_RGTC1_SNORM:
637       return MESA_FORMAT_SIGNED_RED_RGTC1;
638    case PIPE_FORMAT_RGTC2_UNORM:
639       return MESA_FORMAT_RG_RGTC2;
640    case PIPE_FORMAT_RGTC2_SNORM:
641       return MESA_FORMAT_SIGNED_RG_RGTC2;
642 
643    case PIPE_FORMAT_LATC1_UNORM:
644       return MESA_FORMAT_L_LATC1;
645    case PIPE_FORMAT_LATC1_SNORM:
646       return MESA_FORMAT_SIGNED_L_LATC1;
647    case PIPE_FORMAT_LATC2_UNORM:
648       return MESA_FORMAT_LA_LATC2;
649    case PIPE_FORMAT_LATC2_SNORM:
650       return MESA_FORMAT_SIGNED_LA_LATC2;
651 
652    case PIPE_FORMAT_ETC1_RGB8:
653       return MESA_FORMAT_ETC1_RGB8;
654 
655    /* signed normalized formats */
656    case PIPE_FORMAT_R8_SNORM:
657       return MESA_FORMAT_SIGNED_R8;
658    case PIPE_FORMAT_R8G8_SNORM:
659       return MESA_FORMAT_SIGNED_RG88_REV;
660    case PIPE_FORMAT_R8G8B8A8_SNORM:
661       return MESA_FORMAT_SIGNED_RGBA8888_REV;
662 
663    case PIPE_FORMAT_A8_SNORM:
664       return MESA_FORMAT_SIGNED_A8;
665    case PIPE_FORMAT_L8_SNORM:
666       return MESA_FORMAT_SIGNED_L8;
667    case PIPE_FORMAT_L8A8_SNORM:
668       return MESA_FORMAT_SIGNED_AL88;
669    case PIPE_FORMAT_I8_SNORM:
670       return MESA_FORMAT_SIGNED_I8;
671 
672    case PIPE_FORMAT_R16_SNORM:
673       return MESA_FORMAT_SIGNED_R16;
674    case PIPE_FORMAT_R16G16_SNORM:
675       return MESA_FORMAT_SIGNED_GR1616;
676    case PIPE_FORMAT_R16G16B16A16_SNORM:
677       return MESA_FORMAT_SIGNED_RGBA_16;
678 
679    case PIPE_FORMAT_A16_SNORM:
680       return MESA_FORMAT_SIGNED_A16;
681    case PIPE_FORMAT_L16_SNORM:
682       return MESA_FORMAT_SIGNED_L16;
683    case PIPE_FORMAT_L16A16_SNORM:
684       return MESA_FORMAT_SIGNED_AL1616;
685    case PIPE_FORMAT_I16_SNORM:
686       return MESA_FORMAT_SIGNED_I16;
687 
688    case PIPE_FORMAT_R9G9B9E5_FLOAT:
689       return MESA_FORMAT_RGB9_E5_FLOAT;
690    case PIPE_FORMAT_R11G11B10_FLOAT:
691       return MESA_FORMAT_R11_G11_B10_FLOAT;
692 
693    case PIPE_FORMAT_B10G10R10A2_UINT:
694       return MESA_FORMAT_ARGB2101010_UINT;
695    default:
696       assert(0);
697       return MESA_FORMAT_NONE;
698    }
699 }
700 
701 
702 /**
703  * Map GL texture formats to Gallium pipe formats.
704  */
705 struct format_mapping
706 {
707    GLenum glFormats[18];       /**< list of GLenum formats, 0-terminated */
708    enum pipe_format pipeFormats[10]; /**< list of pipe formats, 0-terminated */
709 };
710 
711 
712 #define DEFAULT_RGBA_FORMATS \
713       PIPE_FORMAT_B8G8R8A8_UNORM, \
714       PIPE_FORMAT_A8R8G8B8_UNORM, \
715       PIPE_FORMAT_A8B8G8R8_UNORM, \
716       PIPE_FORMAT_B5G6R5_UNORM, \
717       0
718 
719 #define DEFAULT_RGB_FORMATS \
720       PIPE_FORMAT_B8G8R8X8_UNORM, \
721       PIPE_FORMAT_X8R8G8B8_UNORM, \
722       PIPE_FORMAT_X8B8G8R8_UNORM, \
723       PIPE_FORMAT_B8G8R8A8_UNORM, \
724       PIPE_FORMAT_A8R8G8B8_UNORM, \
725       PIPE_FORMAT_A8B8G8R8_UNORM, \
726       PIPE_FORMAT_B5G6R5_UNORM, \
727       0
728 
729 #define DEFAULT_SRGBA_FORMATS \
730       PIPE_FORMAT_B8G8R8A8_SRGB, \
731       PIPE_FORMAT_A8R8G8B8_SRGB, \
732       PIPE_FORMAT_A8B8G8R8_SRGB, \
733       0
734 
735 #define DEFAULT_DEPTH_FORMATS \
736       PIPE_FORMAT_Z24X8_UNORM, \
737       PIPE_FORMAT_X8Z24_UNORM, \
738       PIPE_FORMAT_Z16_UNORM, \
739       PIPE_FORMAT_Z24_UNORM_S8_UINT, \
740       PIPE_FORMAT_S8_UINT_Z24_UNORM, \
741       0
742 
743 #define DEFAULT_SNORM8_RGBA_FORMATS \
744       PIPE_FORMAT_R8G8B8A8_SNORM, \
745       0
746 
747 #define DEFAULT_UNORM16_RGBA_FORMATS \
748       PIPE_FORMAT_R16G16B16A16_UNORM, \
749       DEFAULT_RGBA_FORMATS
750 
751 
752 /**
753  * This table maps OpenGL texture format enums to Gallium pipe_format enums.
754  * Multiple GL enums might map to multiple pipe_formats.
755  * The first pipe format in the list that's supported is the one that's chosen.
756  */
757 static const struct format_mapping format_map[] = {
758    /* Basic RGB, RGBA formats */
759    {
760       { GL_RGB10, GL_RGB10_A2, 0 },
761       { PIPE_FORMAT_B10G10R10A2_UNORM, DEFAULT_RGBA_FORMATS }
762    },
763    {
764       { 4, GL_RGBA, GL_RGBA8, 0 },
765       { PIPE_FORMAT_R8G8B8A8_UNORM, DEFAULT_RGBA_FORMATS }
766    },
767    {
768       { GL_BGRA, 0 },
769       { PIPE_FORMAT_B8G8R8A8_UNORM, DEFAULT_RGBA_FORMATS }
770    },
771    {
772       { 3, GL_RGB, GL_RGB8, 0 },
773       { DEFAULT_RGB_FORMATS }
774    },
775    {
776       { GL_RGB12, GL_RGB16, GL_RGBA12, GL_RGBA16, 0 },
777       { PIPE_FORMAT_R16G16B16A16_UNORM, DEFAULT_RGBA_FORMATS }
778    },
779    {
780       { GL_RGBA4, GL_RGBA2, 0 },
781       { PIPE_FORMAT_B4G4R4A4_UNORM, DEFAULT_RGBA_FORMATS }
782    },
783    {
784       { GL_RGB5_A1, 0 },
785       { PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
786    },
787    {
788       { GL_R3_G3_B2, 0 },
789       { PIPE_FORMAT_B2G3R3_UNORM, PIPE_FORMAT_B5G6R5_UNORM,
790         PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
791    },
792    {
793       { GL_RGB5, GL_RGB4 },
794       { PIPE_FORMAT_B5G6R5_UNORM, PIPE_FORMAT_B5G5R5A1_UNORM,
795         DEFAULT_RGBA_FORMATS }
796    },
797    {
798       { GL_RGB565 },
799       { PIPE_FORMAT_B5G6R5_UNORM, DEFAULT_RGBA_FORMATS }
800    },
801 
802    /* basic Alpha formats */
803    {
804       { GL_ALPHA12, GL_ALPHA16, 0 },
805       { PIPE_FORMAT_A16_UNORM, PIPE_FORMAT_A8_UNORM,
806         DEFAULT_RGBA_FORMATS }
807    },
808    {
809       { GL_ALPHA, GL_ALPHA4, GL_ALPHA8, GL_COMPRESSED_ALPHA, 0 },
810       { PIPE_FORMAT_A8_UNORM, DEFAULT_RGBA_FORMATS }
811    },
812 
813    /* basic Luminance formats */
814    {
815       { GL_LUMINANCE12, GL_LUMINANCE16, 0 },
816       { PIPE_FORMAT_L16_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
817    },
818    {
819       { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
820       { PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
821    },
822 
823    /* basic Luminance/Alpha formats */
824    {
825       { GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
826         GL_LUMINANCE16_ALPHA16, 0},
827       { PIPE_FORMAT_L16A16_UNORM, PIPE_FORMAT_L8A8_UNORM,
828         DEFAULT_RGBA_FORMATS }
829    },
830    {
831       { 2, GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8, 0 },
832       { PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
833    },
834    {
835       { GL_LUMINANCE4_ALPHA4, 0 },
836       { PIPE_FORMAT_L4A4_UNORM, PIPE_FORMAT_L8A8_UNORM,
837         DEFAULT_RGBA_FORMATS }
838    },
839 
840    /* basic Intensity formats */
841    {
842       { GL_INTENSITY12, GL_INTENSITY16, 0 },
843       { PIPE_FORMAT_I16_UNORM, PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
844    },
845    {
846       { GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
847         GL_COMPRESSED_INTENSITY, 0 },
848       { PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
849    },
850 
851    /* YCbCr */
852    {
853       { GL_YCBCR_MESA, 0 },
854       { PIPE_FORMAT_UYVY, PIPE_FORMAT_YUYV, 0 }
855    },
856 
857    /* compressed formats */ /* XXX PIPE_BIND_SAMPLER_VIEW only */
858    {
859       { GL_COMPRESSED_RGB, 0 },
860       { PIPE_FORMAT_DXT1_RGB, DEFAULT_RGB_FORMATS }
861    },
862    {
863       { GL_COMPRESSED_RGBA, 0 },
864       { PIPE_FORMAT_DXT5_RGBA, DEFAULT_RGBA_FORMATS }
865    },
866    {
867       { GL_RGB_S3TC, GL_RGB4_S3TC, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 0 },
868       { PIPE_FORMAT_DXT1_RGB, 0 }
869    },
870    {
871       { GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0 },
872       { PIPE_FORMAT_DXT1_RGBA, 0 }
873    },
874    {
875       { GL_RGBA_S3TC, GL_RGBA4_S3TC, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0 },
876       { PIPE_FORMAT_DXT3_RGBA, 0 }
877    },
878    {
879       { GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0 },
880       { PIPE_FORMAT_DXT5_RGBA, 0 }
881    },
882 
883 #if 0
884    {
885       { GL_COMPRESSED_RGB_FXT1_3DFX, 0 },
886       { PIPE_FORMAT_RGB_FXT1, 0 }
887    },
888    {
889       { GL_COMPRESSED_RGBA_FXT1_3DFX, 0 },
890       { PIPE_FORMAT_RGBA_FXT1, 0 }
891    },
892 #endif
893 
894    /* Depth formats */
895    {
896       { GL_DEPTH_COMPONENT16, 0 },
897       { PIPE_FORMAT_Z16_UNORM, DEFAULT_DEPTH_FORMATS }
898    },
899    {
900       { GL_DEPTH_COMPONENT24, 0 },
901       { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
902         DEFAULT_DEPTH_FORMATS }
903    },
904    {
905       { GL_DEPTH_COMPONENT32, 0 },
906       { PIPE_FORMAT_Z32_UNORM, DEFAULT_DEPTH_FORMATS }
907    },
908    {
909       { GL_DEPTH_COMPONENT, 0 },
910       { DEFAULT_DEPTH_FORMATS }
911    },
912    {
913       { GL_DEPTH_COMPONENT32F, 0 },
914       { PIPE_FORMAT_Z32_FLOAT, 0 }
915    },
916 
917    /* stencil formats */
918    {
919       { GL_STENCIL_INDEX, GL_STENCIL_INDEX1_EXT, GL_STENCIL_INDEX4_EXT,
920         GL_STENCIL_INDEX8_EXT, GL_STENCIL_INDEX16_EXT, 0 },
921       {
922          PIPE_FORMAT_S8_UINT, PIPE_FORMAT_Z24_UNORM_S8_UINT,
923          PIPE_FORMAT_S8_UINT_Z24_UNORM, 0
924       }
925    },
926 
927    /* Depth / Stencil formats */
928    {
929       { GL_DEPTH_STENCIL_EXT, GL_DEPTH24_STENCIL8_EXT, 0 },
930       { PIPE_FORMAT_Z24_UNORM_S8_UINT, PIPE_FORMAT_S8_UINT_Z24_UNORM, 0 }
931    },
932    {
933       { GL_DEPTH32F_STENCIL8, 0 },
934       { PIPE_FORMAT_Z32_FLOAT_S8X24_UINT, 0 }
935    },
936 
937    /* sRGB formats */
938    {
939       { GL_SRGB_EXT, GL_SRGB8_EXT, GL_SRGB_ALPHA_EXT, GL_SRGB8_ALPHA8_EXT, 0 },
940       { DEFAULT_SRGBA_FORMATS }
941    },
942    {
943       { GL_COMPRESSED_SRGB_EXT, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT, 0 },
944       { PIPE_FORMAT_DXT1_SRGB, DEFAULT_SRGBA_FORMATS }
945    },
946    {
947       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 0 },
948       { PIPE_FORMAT_DXT1_SRGBA, 0 }
949    },
950    {
951       { GL_COMPRESSED_SRGB_ALPHA_EXT,
952         GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 0 },
953       { PIPE_FORMAT_DXT3_SRGBA, DEFAULT_SRGBA_FORMATS }
954    },
955    {
956       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 0 },
957       { PIPE_FORMAT_DXT5_SRGBA, 0 }
958    },
959    {
960       { GL_SLUMINANCE_ALPHA_EXT, GL_SLUMINANCE8_ALPHA8_EXT,
961         GL_COMPRESSED_SLUMINANCE_EXT, GL_COMPRESSED_SLUMINANCE_ALPHA_EXT, 0 },
962       { PIPE_FORMAT_L8A8_SRGB, DEFAULT_SRGBA_FORMATS }
963    },
964    {
965       { GL_SLUMINANCE_EXT, GL_SLUMINANCE8_EXT, 0 },
966       { PIPE_FORMAT_L8_SRGB, DEFAULT_SRGBA_FORMATS }
967    },
968 
969    /* 16-bit float formats */
970    {
971       { GL_RGBA16F_ARB, 0 },
972       { PIPE_FORMAT_R16G16B16A16_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
973    },
974    {
975       { GL_RGB16F_ARB, 0 },
976       { PIPE_FORMAT_R16G16B16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
977         PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
978    },
979    {
980       { GL_LUMINANCE_ALPHA16F_ARB, 0 },
981       { PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
982         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
983    },
984    {
985       { GL_ALPHA16F_ARB, 0 },
986       { PIPE_FORMAT_A16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
987         PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
988         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
989    },
990    {
991       { GL_INTENSITY16F_ARB, 0 },
992       { PIPE_FORMAT_I16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
993         PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
994         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
995    },
996    {
997       { GL_LUMINANCE16F_ARB, 0 },
998       { PIPE_FORMAT_L16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
999         PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
1000         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
1001    },
1002    {
1003       { GL_R16F, 0 },
1004       { PIPE_FORMAT_R16_FLOAT, PIPE_FORMAT_R16G16_FLOAT,
1005         PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
1006         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
1007    },
1008    {
1009       { GL_RG16F, 0 },
1010       { PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
1011         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
1012    },
1013 
1014    /* 32-bit float formats */
1015    {
1016       { GL_RGBA32F_ARB, 0 },
1017       { PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1018    },
1019    {
1020       { GL_RGB32F_ARB, 0 },
1021       { PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1022         PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1023    },
1024    {
1025       { GL_LUMINANCE_ALPHA32F_ARB, 0 },
1026       { PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1027         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1028    },
1029    {
1030       { GL_ALPHA32F_ARB, 0 },
1031       { PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1032         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_A16_FLOAT,
1033         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1034    },
1035    {
1036       { GL_INTENSITY32F_ARB, 0 },
1037       { PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1038         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_I16_FLOAT,
1039         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1040    },
1041    {
1042       { GL_LUMINANCE32F_ARB, 0 },
1043       { PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1044         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_L16_FLOAT,
1045         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1046    },
1047    {
1048       { GL_R32F, 0 },
1049       { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT,
1050         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16_FLOAT,
1051         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1052    },
1053    {
1054       { GL_RG32F, 0 },
1055       { PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1056         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1057    },
1058 
1059    /* R, RG formats */
1060    {
1061       { GL_RED, GL_R8, 0 },
1062       { PIPE_FORMAT_R8_UNORM, PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1063    },
1064    {
1065       { GL_RG, GL_RG8, 0 },
1066       { PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1067    },
1068    {
1069       { GL_R16, 0 },
1070       { PIPE_FORMAT_R16_UNORM, PIPE_FORMAT_R16G16_UNORM,
1071         DEFAULT_UNORM16_RGBA_FORMATS }
1072    },
1073    {
1074       { GL_RG16, 0 },
1075       { PIPE_FORMAT_R16G16_UNORM, DEFAULT_UNORM16_RGBA_FORMATS }
1076    },
1077 
1078    /* compressed R, RG formats */
1079    {
1080       { GL_COMPRESSED_RED, GL_COMPRESSED_RED_RGTC1, 0 },
1081       { PIPE_FORMAT_RGTC1_UNORM, PIPE_FORMAT_R8_UNORM, DEFAULT_RGBA_FORMATS }
1082    },
1083    {
1084       { GL_COMPRESSED_SIGNED_RED_RGTC1, 0 },
1085       { PIPE_FORMAT_RGTC1_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1086    },
1087    {
1088       { GL_COMPRESSED_RG, GL_COMPRESSED_RG_RGTC2, 0 },
1089       { PIPE_FORMAT_RGTC2_UNORM, PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1090    },
1091    {
1092       { GL_COMPRESSED_SIGNED_RG_RGTC2, 0 },
1093       { PIPE_FORMAT_RGTC2_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1094    },
1095    {
1096       { GL_COMPRESSED_LUMINANCE, GL_COMPRESSED_LUMINANCE_LATC1_EXT, 0 },
1097       { PIPE_FORMAT_LATC1_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGBA_FORMATS }
1098    },
1099    {
1100       { GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT, 0 },
1101       { PIPE_FORMAT_LATC1_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1102    },
1103    {
1104       { GL_COMPRESSED_LUMINANCE_ALPHA, GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT,
1105         GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI, 0 },
1106       { PIPE_FORMAT_LATC2_UNORM, PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
1107    },
1108    {
1109       { GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT, 0 },
1110       { PIPE_FORMAT_LATC2_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1111    },
1112 
1113    /* ETC1 */
1114    {
1115       { GL_ETC1_RGB8_OES, 0 },
1116       { PIPE_FORMAT_ETC1_RGB8, 0 }
1117    },
1118 
1119    /* signed/unsigned integer formats.
1120     */
1121    {
1122       { GL_RED_INTEGER_EXT,
1123         GL_GREEN_INTEGER_EXT,
1124         GL_BLUE_INTEGER_EXT,
1125         GL_RGBA_INTEGER_EXT,
1126         GL_BGRA_INTEGER_EXT,
1127         GL_RGBA8I_EXT, 0 },
1128       { PIPE_FORMAT_R8G8B8A8_SINT, 0 }
1129    },
1130    {
1131       { GL_RGB_INTEGER_EXT,
1132         GL_BGR_INTEGER_EXT,
1133         GL_RGB8I_EXT, 0 },
1134       { PIPE_FORMAT_R8G8B8_SINT,
1135         PIPE_FORMAT_R8G8B8A8_SINT, 0 }
1136    },
1137    {
1138       { GL_ALPHA_INTEGER_EXT,
1139         GL_ALPHA8I_EXT, 0 },
1140       { PIPE_FORMAT_A8_SINT, 0 }
1141    },
1142    {
1143       { GL_ALPHA16I_EXT, 0 },
1144       { PIPE_FORMAT_A16_SINT, 0 }
1145    },
1146    {
1147       { GL_ALPHA32I_EXT, 0 },
1148       { PIPE_FORMAT_A32_SINT, 0 }
1149    },
1150    {
1151       { GL_ALPHA8UI_EXT, 0 },
1152       { PIPE_FORMAT_A8_UINT, 0 }
1153    },
1154    {
1155       { GL_ALPHA16UI_EXT, 0 },
1156       { PIPE_FORMAT_A16_UINT, 0 }
1157    },
1158    {
1159       { GL_ALPHA32UI_EXT, 0 },
1160       { PIPE_FORMAT_A32_UINT, 0 }
1161    },
1162    {
1163       { GL_INTENSITY8I_EXT, 0 },
1164       { PIPE_FORMAT_I8_SINT, 0 }
1165    },
1166    {
1167       { GL_INTENSITY16I_EXT, 0 },
1168       { PIPE_FORMAT_I16_SINT, 0 }
1169    },
1170    {
1171       { GL_INTENSITY32I_EXT, 0 },
1172       { PIPE_FORMAT_I32_SINT, 0 }
1173    },
1174    {
1175       { GL_INTENSITY8UI_EXT, 0 },
1176       { PIPE_FORMAT_I8_UINT, 0 }
1177    },
1178    {
1179       { GL_INTENSITY16UI_EXT, 0 },
1180       { PIPE_FORMAT_I16_UINT, 0 }
1181    },
1182    {
1183       { GL_INTENSITY32UI_EXT, 0 },
1184       { PIPE_FORMAT_I32_UINT, 0 }
1185    },
1186    {
1187       { GL_LUMINANCE8I_EXT, 0 },
1188       { PIPE_FORMAT_L8_SINT, 0 }
1189    },
1190    {
1191       { GL_LUMINANCE16I_EXT, 0 },
1192       { PIPE_FORMAT_L16_SINT, 0 }
1193    },
1194    {
1195       { GL_LUMINANCE32I_EXT, 0 },
1196       { PIPE_FORMAT_L32_SINT, 0 }
1197    },
1198    {
1199       { GL_LUMINANCE_INTEGER_EXT,
1200         GL_LUMINANCE8UI_EXT, 0 },
1201       { PIPE_FORMAT_L8_UINT, 0 }
1202    },
1203    {
1204       { GL_LUMINANCE16UI_EXT, 0 },
1205       { PIPE_FORMAT_L16_UINT, 0 }
1206    },
1207    {
1208       { GL_LUMINANCE32UI_EXT, 0 },
1209       { PIPE_FORMAT_L32_UINT, 0 }
1210    },
1211    {
1212       { GL_LUMINANCE_ALPHA_INTEGER_EXT,
1213         GL_LUMINANCE_ALPHA8I_EXT, 0 },
1214       { PIPE_FORMAT_L8A8_SINT, 0 }
1215    },
1216    {
1217       { GL_LUMINANCE_ALPHA16I_EXT, 0 },
1218       { PIPE_FORMAT_L16A16_SINT, 0 }
1219    },
1220    {
1221       { GL_LUMINANCE_ALPHA32I_EXT, 0 },
1222       { PIPE_FORMAT_L32A32_SINT, 0 }
1223    },
1224    {
1225       { GL_LUMINANCE_ALPHA8UI_EXT, 0 },
1226       { PIPE_FORMAT_L8A8_UINT, 0 }
1227    },
1228    {
1229       { GL_LUMINANCE_ALPHA16UI_EXT, 0 },
1230       { PIPE_FORMAT_L16A16_UINT, 0 }
1231    },
1232    {
1233       { GL_LUMINANCE_ALPHA32UI_EXT, 0 },
1234       { PIPE_FORMAT_L32A32_UINT, 0 }
1235    },
1236    {
1237       { GL_RGB16I_EXT, 0 },
1238       { PIPE_FORMAT_R16G16B16_SINT,
1239         PIPE_FORMAT_R16G16B16A16_SINT, 0 },
1240    },
1241    {
1242       { GL_RGBA16I_EXT, 0 },
1243       { PIPE_FORMAT_R16G16B16A16_SINT, 0 },
1244    },
1245    {
1246       { GL_RGB32I_EXT, 0 },
1247       { PIPE_FORMAT_R32G32B32_SINT,
1248         PIPE_FORMAT_R32G32B32A32_SINT, 0 },
1249    },
1250    {
1251       { GL_RGBA32I_EXT, 0 },
1252       { PIPE_FORMAT_R32G32B32A32_SINT, 0 }
1253    },
1254    {
1255       { GL_RGBA8UI_EXT, 0 },
1256       { PIPE_FORMAT_R8G8B8A8_UINT, 0 }
1257    },
1258    {
1259       { GL_RGB8UI_EXT, 0 },
1260       { PIPE_FORMAT_R8G8B8_UINT,
1261         PIPE_FORMAT_R8G8B8A8_UINT, 0 }
1262    },
1263    {
1264       { GL_RGB16UI_EXT, 0 },
1265       { PIPE_FORMAT_R16G16B16_UINT,
1266         PIPE_FORMAT_R16G16B16A16_UINT, 0 }
1267    },
1268    {
1269       { GL_RGBA16UI_EXT, 0 },
1270       { PIPE_FORMAT_R16G16B16A16_UINT, 0 }
1271    },
1272    {
1273       { GL_RGB32UI_EXT, 0},
1274       { PIPE_FORMAT_R32G32B32_UINT,
1275         PIPE_FORMAT_R32G32B32A32_UINT, 0 }
1276    },
1277    {
1278       { GL_RGBA32UI_EXT, 0},
1279       { PIPE_FORMAT_R32G32B32A32_UINT, 0 }
1280    },
1281    {
1282      { GL_R8I, 0},
1283      { PIPE_FORMAT_R8_SINT, 0},
1284    },
1285    {
1286      { GL_R16I, 0},
1287      { PIPE_FORMAT_R16_SINT, 0},
1288    },
1289    {
1290      { GL_R32I, 0},
1291      { PIPE_FORMAT_R32_SINT, 0},
1292    },
1293   {
1294      { GL_R8UI, 0},
1295      { PIPE_FORMAT_R8_UINT, 0},
1296    },
1297    {
1298      { GL_R16UI, 0},
1299      { PIPE_FORMAT_R16_UINT, 0},
1300    },
1301    {
1302      { GL_R32UI, 0},
1303      { PIPE_FORMAT_R32_UINT, 0},
1304    },
1305    {
1306      { GL_RG8I, 0},
1307      { PIPE_FORMAT_R8G8_SINT, 0},
1308    },
1309    {
1310      { GL_RG16I, 0},
1311      { PIPE_FORMAT_R16G16_SINT, 0},
1312    },
1313    {
1314      { GL_RG32I, 0},
1315      { PIPE_FORMAT_R32G32_SINT, 0},
1316    },
1317   {
1318      { GL_RG8UI, 0},
1319      { PIPE_FORMAT_R8G8_UINT, 0},
1320    },
1321    {
1322      { GL_RG16UI, 0},
1323      { PIPE_FORMAT_R16G16_UINT, 0},
1324    },
1325    {
1326      { GL_RG32UI, 0},
1327      { PIPE_FORMAT_R32G32_UINT, 0},
1328    },
1329    /* signed normalized formats */
1330    {
1331       { GL_RED_SNORM, GL_R8_SNORM, 0 },
1332       { PIPE_FORMAT_R8_SNORM, PIPE_FORMAT_R8G8_SNORM,
1333         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1334    },
1335    {
1336       { GL_R16_SNORM, 0 },
1337       { PIPE_FORMAT_R16_SNORM,
1338         PIPE_FORMAT_R16G16_SNORM,
1339         PIPE_FORMAT_R16G16B16A16_SNORM,
1340         PIPE_FORMAT_R8_SNORM,
1341         PIPE_FORMAT_R8G8_SNORM,
1342         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1343    },
1344    {
1345       { GL_RG_SNORM, GL_RG8_SNORM, 0 },
1346       { PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1347    },
1348    {
1349       { GL_RG16_SNORM, 0 },
1350       { PIPE_FORMAT_R16G16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1351         PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1352    },
1353    {
1354       { GL_RGB_SNORM, GL_RGB8_SNORM, GL_RGBA_SNORM, GL_RGBA8_SNORM, 0 },
1355       { PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1356    },
1357    {
1358       { GL_RGB16_SNORM, GL_RGBA16_SNORM, 0 },
1359       { PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1360    },
1361    {
1362       { GL_ALPHA_SNORM, GL_ALPHA8_SNORM, 0 },
1363       { PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1364    },
1365    {
1366       { GL_ALPHA16_SNORM, 0 },
1367       { PIPE_FORMAT_A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1368         PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1369    },
1370    {
1371       { GL_LUMINANCE_SNORM, GL_LUMINANCE8_SNORM, 0 },
1372       { PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1373    },
1374    {
1375       { GL_LUMINANCE16_SNORM, 0 },
1376       { PIPE_FORMAT_L16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1377         PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1378    },
1379    {
1380       { GL_LUMINANCE_ALPHA_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, 0 },
1381       { PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1382    },
1383    {
1384       { GL_LUMINANCE16_ALPHA16_SNORM, 0 },
1385       { PIPE_FORMAT_L16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1386         PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1387    },
1388    {
1389       { GL_INTENSITY_SNORM, GL_INTENSITY8_SNORM, 0 },
1390       { PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1391    },
1392    {
1393       { GL_INTENSITY16_SNORM, 0 },
1394       { PIPE_FORMAT_I16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1395         PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1396    },
1397    {
1398       { GL_RGB9_E5, 0 },
1399       { PIPE_FORMAT_R9G9B9E5_FLOAT, 0 }
1400    },
1401    {
1402       { GL_R11F_G11F_B10F, 0 },
1403       { PIPE_FORMAT_R11G11B10_FLOAT, 0 }
1404    },
1405    {
1406       { GL_RGB10_A2UI, 0 },
1407       { PIPE_FORMAT_B10G10R10A2_UINT, 0 }
1408    },
1409 };
1410 
1411 
1412 /**
1413  * Return first supported format from the given list.
1414  */
1415 static enum pipe_format
find_supported_format(struct pipe_screen * screen,const enum pipe_format formats[],enum pipe_texture_target target,unsigned sample_count,unsigned tex_usage)1416 find_supported_format(struct pipe_screen *screen,
1417                       const enum pipe_format formats[],
1418                       enum pipe_texture_target target,
1419                       unsigned sample_count,
1420                       unsigned tex_usage)
1421 {
1422    uint i;
1423    for (i = 0; formats[i]; i++) {
1424       if (screen->is_format_supported(screen, formats[i], target,
1425                                       sample_count, tex_usage)) {
1426          return formats[i];
1427       }
1428    }
1429    return PIPE_FORMAT_NONE;
1430 }
1431 
1432 struct exact_format_mapping
1433 {
1434    GLenum format;
1435    GLenum type;
1436    enum pipe_format pformat;
1437 };
1438 
1439 static const struct exact_format_mapping rgba8888_tbl[] =
1440 {
1441    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8B8G8R8_UNORM },
1442    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_A8B8G8R8_UNORM },
1443    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8A8_UNORM },
1444    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8A8_UNORM },
1445    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8R8G8B8_UNORM },
1446    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8A8_UNORM },
1447    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8A8_UNORM },
1448    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_A8B8G8R8_UNORM },
1449    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8A8_UNORM },
1450    { 0,           0,                              0                          }
1451 };
1452 
1453 static const struct exact_format_mapping rgbx8888_tbl[] =
1454 {
1455    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8R8G8B8_UNORM },
1456    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8X8_UNORM },
1457    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8X8_UNORM },
1458    /* No Mesa formats for these Gallium formats:
1459    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8B8G8R8_UNORM },
1460    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_X8B8G8R8_UNORM },
1461    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8X8_UNORM },
1462    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8X8_UNORM },
1463    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8X8_UNORM },
1464    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_X8B8G8R8_UNORM },
1465    */
1466    { 0,           0,                              0                          }
1467 };
1468 
1469 static const struct exact_format_mapping rgba1010102_tbl[] =
1470 {
1471    { GL_BGRA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_B10G10R10A2_UNORM },
1472    /* No Mesa formats for these Gallium formats:
1473    { GL_RGBA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_R10G10B10A2_UNORM },
1474    { GL_ABGR_EXT, GL_UNSIGNED_INT_10_10_10_2,     PIPE_FORMAT_R10G10B10A2_UNORM },
1475    { GL_ABGR_EXT, GL_UNSIGNED_INT,                PIPE_FORMAT_R10G10B10A2_UNORM },
1476    */
1477    { 0,           0,                              0                             }
1478 };
1479 
1480 /**
1481  * If there is an exact pipe_format match for {internalFormat, format, type}
1482  * return that, otherwise return PIPE_FORMAT_NONE so we can do fuzzy matching.
1483  */
1484 static enum pipe_format
find_exact_format(GLint internalFormat,GLenum format,GLenum type)1485 find_exact_format(GLint internalFormat, GLenum format, GLenum type)
1486 {
1487    uint i;
1488    const struct exact_format_mapping* tbl;
1489 
1490    if (format == GL_NONE || type == GL_NONE)
1491       return PIPE_FORMAT_NONE;
1492 
1493    switch (internalFormat) {
1494    case 4:
1495    case GL_RGBA:
1496    case GL_RGBA8:
1497       tbl = rgba8888_tbl;
1498       break;
1499    case 3:
1500    case GL_RGB:
1501    case GL_RGB8:
1502       tbl = rgbx8888_tbl;
1503       break;
1504    case GL_RGB10_A2:
1505       tbl = rgba1010102_tbl;
1506       break;
1507    default:
1508       return PIPE_FORMAT_NONE;
1509    }
1510 
1511    for (i = 0; tbl[i].format; i++)
1512       if (tbl[i].format == format && tbl[i].type == type)
1513          return tbl[i].pformat;
1514 
1515    return PIPE_FORMAT_NONE;
1516 }
1517 
1518 /**
1519  * Given an OpenGL internalFormat value for a texture or surface, return
1520  * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
1521  * This is called during glTexImage2D, for example.
1522  *
1523  * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
1524  * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
1525  * we want render-to-texture ability.
1526  *
1527  * \param internalFormat  the user value passed to glTexImage2D
1528  * \param target  one of PIPE_TEXTURE_x
1529  * \param bindings  bitmask of PIPE_BIND_x flags.
1530  */
1531 enum pipe_format
st_choose_format(struct pipe_screen * screen,GLenum internalFormat,GLenum format,GLenum type,enum pipe_texture_target target,unsigned sample_count,unsigned bindings)1532 st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
1533                  GLenum format, GLenum type,
1534                  enum pipe_texture_target target, unsigned sample_count,
1535                  unsigned bindings)
1536 {
1537    GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
1538    int i, j;
1539    enum pipe_format pf;
1540 
1541    /* can't render to compressed formats at this time */
1542    if (_mesa_is_compressed_format(ctx, internalFormat)
1543        && (bindings & ~PIPE_BIND_SAMPLER_VIEW)) {
1544       return PIPE_FORMAT_NONE;
1545    }
1546 
1547    /* search for exact matches */
1548    pf = find_exact_format(internalFormat, format, type);
1549    if (pf != PIPE_FORMAT_NONE &&
1550        screen->is_format_supported(screen, pf,
1551                                    target, sample_count, bindings))
1552       return pf;
1553 
1554    /* search table for internalFormat */
1555    for (i = 0; i < Elements(format_map); i++) {
1556       const struct format_mapping *mapping = &format_map[i];
1557       for (j = 0; mapping->glFormats[j]; j++) {
1558          if (mapping->glFormats[j] == internalFormat) {
1559             /* Found the desired internal format.  Find first pipe format
1560              * which is supported by the driver.
1561              */
1562             return find_supported_format(screen, mapping->pipeFormats,
1563                                          target, sample_count, bindings);
1564          }
1565       }
1566    }
1567 
1568    _mesa_problem(NULL, "unhandled format!\n");
1569    return PIPE_FORMAT_NONE;
1570 }
1571 
1572 
1573 /**
1574  * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
1575  */
1576 enum pipe_format
st_choose_renderbuffer_format(struct pipe_screen * screen,GLenum internalFormat,unsigned sample_count)1577 st_choose_renderbuffer_format(struct pipe_screen *screen,
1578                               GLenum internalFormat, unsigned sample_count)
1579 {
1580    uint usage;
1581    if (_mesa_is_depth_or_stencil_format(internalFormat))
1582       usage = PIPE_BIND_DEPTH_STENCIL;
1583    else
1584       usage = PIPE_BIND_RENDER_TARGET;
1585    return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE, PIPE_TEXTURE_2D,
1586                            sample_count, usage);
1587 }
1588 
1589 
1590 gl_format
st_ChooseTextureFormat_renderable(struct gl_context * ctx,GLint internalFormat,GLenum format,GLenum type,GLboolean renderable)1591 st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,
1592 				  GLenum format, GLenum type, GLboolean renderable)
1593 {
1594    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1595    enum pipe_format pFormat;
1596    uint bindings;
1597 
1598    (void) format;
1599    (void) type;
1600 
1601    /* GL textures may wind up being render targets, but we don't know
1602     * that in advance.  Specify potential render target flags now.
1603     */
1604    bindings = PIPE_BIND_SAMPLER_VIEW;
1605    if (renderable) {
1606       if (_mesa_is_depth_or_stencil_format(internalFormat))
1607 	 bindings |= PIPE_BIND_DEPTH_STENCIL;
1608       else
1609 	 bindings |= PIPE_BIND_RENDER_TARGET;
1610    }
1611 
1612    pFormat = st_choose_format(screen, internalFormat, format, type,
1613                               PIPE_TEXTURE_2D, 0, bindings);
1614 
1615    if (pFormat == PIPE_FORMAT_NONE) {
1616       /* try choosing format again, this time without render target bindings */
1617       pFormat = st_choose_format(screen, internalFormat, format, type,
1618                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
1619    }
1620 
1621    if (pFormat == PIPE_FORMAT_NONE) {
1622       /* no luck at all */
1623       return MESA_FORMAT_NONE;
1624    }
1625 
1626    return st_pipe_format_to_mesa_format(pFormat);
1627 }
1628 
1629 
1630 /**
1631  * Called via ctx->Driver.ChooseTextureFormat().
1632  */
1633 gl_format
st_ChooseTextureFormat(struct gl_context * ctx,GLenum target,GLint internalFormat,GLenum format,GLenum type)1634 st_ChooseTextureFormat(struct gl_context *ctx, GLenum target,
1635                        GLint internalFormat,
1636                        GLenum format, GLenum type)
1637 {
1638    boolean want_renderable =
1639       internalFormat == 3 || internalFormat == 4 ||
1640       internalFormat == GL_RGB || internalFormat == GL_RGBA ||
1641       internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
1642       internalFormat == GL_BGRA;
1643 
1644    if (target == GL_TEXTURE_1D || target == GL_TEXTURE_1D_ARRAY) {
1645       /* We don't do compression for these texture targets because of
1646        * difficulty with sub-texture updates on non-block boundaries, etc.
1647        * So change the internal format request to an uncompressed format.
1648        */
1649       internalFormat =
1650         _mesa_generic_compressed_format_to_uncompressed_format(internalFormat);
1651    }
1652 
1653    return st_ChooseTextureFormat_renderable(ctx, internalFormat,
1654 					    format, type, want_renderable);
1655 }
1656 
1657 
1658 GLboolean
st_sampler_compat_formats(enum pipe_format format1,enum pipe_format format2)1659 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
1660 {
1661    if (format1 == format2)
1662       return GL_TRUE;
1663 
1664    if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
1665        format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
1666       return GL_TRUE;
1667 
1668    if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
1669        format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
1670       return GL_TRUE;
1671 
1672    if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
1673        format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
1674       return GL_TRUE;
1675 
1676    if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
1677        format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
1678       return GL_TRUE;
1679 
1680    if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
1681        format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
1682       return GL_TRUE;
1683 
1684    if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
1685        format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
1686       return GL_TRUE;
1687 
1688    return GL_FALSE;
1689 }
1690 
1691 
1692 
1693 /**
1694  * This is used for translating texture border color and the clear
1695  * color.  For example, the clear color is interpreted according to
1696  * the renderbuffer's base format.  For example, if clearing a
1697  * GL_LUMINANCE buffer, we'll return colorOut[0] = colorOut[1] =
1698  * colorOut[2] = colorIn[0].
1699  * Similarly for texture border colors.
1700  */
1701 void
st_translate_color(union gl_color_union * colorIn,union pipe_color_union * colorOut,GLenum baseFormat,GLboolean is_integer)1702 st_translate_color(union gl_color_union *colorIn,
1703                    union pipe_color_union *colorOut,
1704                    GLenum baseFormat, GLboolean is_integer)
1705 {
1706    if (is_integer) {
1707       int *in = colorIn->i;
1708       int *out = colorOut->i;
1709 
1710       switch (baseFormat) {
1711       case GL_RED:
1712          out[0] = in[0];
1713          out[1] = 0;
1714          out[2] = 0;
1715          out[3] = 1;
1716          break;
1717       case GL_RG:
1718          out[0] = in[0];
1719          out[1] = in[1];
1720          out[2] = 0;
1721          out[3] = 1;
1722          break;
1723       case GL_RGB:
1724          out[0] = in[0];
1725          out[1] = in[1];
1726          out[2] = in[2];
1727          out[3] = 1;
1728          break;
1729       case GL_ALPHA:
1730          out[0] = out[1] = out[2] = 0;
1731          out[3] = in[3];
1732          break;
1733       case GL_LUMINANCE:
1734          out[0] = out[1] = out[2] = in[0];
1735          out[3] = 1;
1736          break;
1737       case GL_LUMINANCE_ALPHA:
1738          out[0] = out[1] = out[2] = in[0];
1739          out[3] = in[3];
1740          break;
1741       case GL_INTENSITY:
1742          out[0] = out[1] = out[2] = out[3] = in[0];
1743          break;
1744       default:
1745          COPY_4V(out, in);
1746       }
1747    }
1748    else {
1749       float *in = colorIn->f;
1750       float *out = colorOut->f;
1751 
1752       switch (baseFormat) {
1753       case GL_RED:
1754          out[0] = in[0];
1755          out[1] = 0.0F;
1756          out[2] = 0.0F;
1757          out[3] = 1.0F;
1758          break;
1759       case GL_RG:
1760          out[0] = in[0];
1761          out[1] = in[1];
1762          out[2] = 0.0F;
1763          out[3] = 1.0F;
1764          break;
1765       case GL_RGB:
1766          out[0] = in[0];
1767          out[1] = in[1];
1768          out[2] = in[2];
1769          out[3] = 1.0F;
1770          break;
1771       case GL_ALPHA:
1772          out[0] = out[1] = out[2] = 0.0F;
1773          out[3] = in[3];
1774          break;
1775       case GL_LUMINANCE:
1776          out[0] = out[1] = out[2] = in[0];
1777          out[3] = 1.0F;
1778          break;
1779       case GL_LUMINANCE_ALPHA:
1780          out[0] = out[1] = out[2] = in[0];
1781          out[3] = in[3];
1782          break;
1783       case GL_INTENSITY:
1784          out[0] = out[1] = out[2] = out[3] = in[0];
1785          break;
1786       default:
1787          COPY_4V(out, in);
1788       }
1789    }
1790 }
1791