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st/mesa: enable GL_ATI_fragment_shader
[mesa.git] / src / mesa / state_tracker / st_extensions.c
1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * Copyright (c) 2008 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 VMWARE 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 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/macros.h"
32 #include "main/version.h"
33
34 #include "pipe/p_context.h"
35 #include "pipe/p_defines.h"
36 #include "pipe/p_screen.h"
37 #include "util/u_math.h"
38
39 #include "st_context.h"
40 #include "st_debug.h"
41 #include "st_extensions.h"
42 #include "st_format.h"
43
44
45 /*
46 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
47 * avoid evaluating arguments (which are often function calls) more than once.
48 */
49
50 static unsigned _min(unsigned a, unsigned b)
51 {
52 return (a < b) ? a : b;
53 }
54
55 static float _maxf(float a, float b)
56 {
57 return (a > b) ? a : b;
58 }
59
60 static int _clamp(int a, int min, int max)
61 {
62 if (a < min)
63 return min;
64 else if (a > max)
65 return max;
66 else
67 return a;
68 }
69
70
71 /**
72 * Query driver to get implementation limits.
73 * Note that we have to limit/clamp against Mesa's internal limits too.
74 */
75 void st_init_limits(struct pipe_screen *screen,
76 struct gl_constants *c, struct gl_extensions *extensions)
77 {
78 int supported_irs;
79 unsigned sh;
80 boolean can_ubo = TRUE;
81
82 c->MaxTextureLevels
83 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
84 MAX_TEXTURE_LEVELS);
85
86 c->Max3DTextureLevels
87 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
88 MAX_3D_TEXTURE_LEVELS);
89
90 c->MaxCubeTextureLevels
91 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
92 MAX_CUBE_TEXTURE_LEVELS);
93
94 c->MaxTextureRectSize
95 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
96
97 c->MaxArrayTextureLayers
98 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
99
100 /* Define max viewport size and max renderbuffer size in terms of
101 * max texture size (note: max tex RECT size = max tex 2D size).
102 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
103 */
104 c->MaxViewportWidth =
105 c->MaxViewportHeight =
106 c->MaxRenderbufferSize = c->MaxTextureRectSize;
107
108 c->MaxDrawBuffers = c->MaxColorAttachments =
109 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
110 1, MAX_DRAW_BUFFERS);
111
112 c->MaxDualSourceDrawBuffers =
113 _clamp(screen->get_param(screen,
114 PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
115 0, MAX_DRAW_BUFFERS);
116
117 c->MaxLineWidth =
118 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH));
119 c->MaxLineWidthAA =
120 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH_AA));
121
122 c->MaxPointSize =
123 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH));
124 c->MaxPointSizeAA =
125 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH_AA));
126
127 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
128 * for non-aa sizes, but we can go down to 0.0 for aa points.
129 */
130 c->MinPointSize = 1.0f;
131 c->MinPointSizeAA = 0.0f;
132
133 c->MaxTextureMaxAnisotropy =
134 _maxf(2.0f,
135 screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
136
137 c->MaxTextureLodBias =
138 screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
139
140 c->QuadsFollowProvokingVertexConvention =
141 screen->get_param(screen,
142 PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
143
144 c->MaxUniformBlockSize =
145 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
146 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE);
147 if (c->MaxUniformBlockSize < 16384) {
148 can_ubo = FALSE;
149 }
150
151 for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
152 struct gl_shader_compiler_options *options;
153 struct gl_program_constants *pc;
154
155 switch (sh) {
156 case PIPE_SHADER_FRAGMENT:
157 pc = &c->Program[MESA_SHADER_FRAGMENT];
158 options = &c->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
159 break;
160 case PIPE_SHADER_VERTEX:
161 pc = &c->Program[MESA_SHADER_VERTEX];
162 options = &c->ShaderCompilerOptions[MESA_SHADER_VERTEX];
163 break;
164 case PIPE_SHADER_GEOMETRY:
165 pc = &c->Program[MESA_SHADER_GEOMETRY];
166 options = &c->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
167 break;
168 case PIPE_SHADER_TESS_CTRL:
169 pc = &c->Program[MESA_SHADER_TESS_CTRL];
170 options = &c->ShaderCompilerOptions[MESA_SHADER_TESS_CTRL];
171 break;
172 case PIPE_SHADER_TESS_EVAL:
173 pc = &c->Program[MESA_SHADER_TESS_EVAL];
174 options = &c->ShaderCompilerOptions[MESA_SHADER_TESS_EVAL];
175 break;
176 case PIPE_SHADER_COMPUTE:
177 pc = &c->Program[MESA_SHADER_COMPUTE];
178 options = &c->ShaderCompilerOptions[MESA_SHADER_COMPUTE];
179
180 if (!screen->get_param(screen, PIPE_CAP_COMPUTE))
181 continue;
182 supported_irs =
183 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUPPORTED_IRS);
184 if (!(supported_irs & (1 << PIPE_SHADER_IR_TGSI)))
185 continue;
186 break;
187 default:
188 assert(0);
189 }
190
191 pc->MaxTextureImageUnits =
192 _min(screen->get_shader_param(screen, sh,
193 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
194 MAX_TEXTURE_IMAGE_UNITS);
195
196 pc->MaxInstructions =
197 pc->MaxNativeInstructions =
198 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
199 pc->MaxAluInstructions =
200 pc->MaxNativeAluInstructions =
201 screen->get_shader_param(screen, sh,
202 PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
203 pc->MaxTexInstructions =
204 pc->MaxNativeTexInstructions =
205 screen->get_shader_param(screen, sh,
206 PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
207 pc->MaxTexIndirections =
208 pc->MaxNativeTexIndirections =
209 screen->get_shader_param(screen, sh,
210 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
211 pc->MaxAttribs =
212 pc->MaxNativeAttribs =
213 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
214 pc->MaxTemps =
215 pc->MaxNativeTemps =
216 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
217 pc->MaxAddressRegs =
218 pc->MaxNativeAddressRegs = sh == PIPE_SHADER_VERTEX ? 1 : 0;
219 pc->MaxParameters =
220 pc->MaxNativeParameters =
221 screen->get_shader_param(screen, sh,
222 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
223 pc->MaxInputComponents =
224 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS) * 4;
225 pc->MaxOutputComponents =
226 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_OUTPUTS) * 4;
227
228 pc->MaxUniformComponents =
229 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
230
231 pc->MaxUniformBlocks =
232 screen->get_shader_param(screen, sh,
233 PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
234 if (pc->MaxUniformBlocks)
235 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
236 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
237
238 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
239 c->MaxUniformBlockSize / 4 *
240 pc->MaxUniformBlocks);
241
242 pc->MaxAtomicCounters = MAX_ATOMIC_COUNTERS;
243 pc->MaxAtomicBuffers = screen->get_shader_param(
244 screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS) / 2;
245 pc->MaxShaderStorageBlocks = pc->MaxAtomicBuffers;
246
247 pc->MaxImageUniforms = screen->get_shader_param(
248 screen, sh, PIPE_SHADER_CAP_MAX_SHADER_IMAGES);
249
250 /* Gallium doesn't really care about local vs. env parameters so use the
251 * same limits.
252 */
253 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
254 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
255
256 if (screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INTEGERS)) {
257 pc->LowInt.RangeMin = 31;
258 pc->LowInt.RangeMax = 30;
259 pc->LowInt.Precision = 0;
260 pc->MediumInt = pc->HighInt = pc->LowInt;
261 }
262
263 options->EmitNoNoise = TRUE;
264
265 /* TODO: make these more fine-grained if anyone needs it */
266 options->MaxIfDepth =
267 screen->get_shader_param(screen, sh,
268 PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
269 options->EmitNoLoops =
270 !screen->get_shader_param(screen, sh,
271 PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
272 options->EmitNoFunctions =
273 !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
274 options->EmitNoMainReturn =
275 !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
276
277 options->EmitNoCont =
278 !screen->get_shader_param(screen, sh,
279 PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
280
281 options->EmitNoIndirectInput =
282 !screen->get_shader_param(screen, sh,
283 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
284 options->EmitNoIndirectOutput =
285 !screen->get_shader_param(screen, sh,
286 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
287 options->EmitNoIndirectTemp =
288 !screen->get_shader_param(screen, sh,
289 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
290 options->EmitNoIndirectUniform =
291 !screen->get_shader_param(screen, sh,
292 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
293
294 if (pc->MaxNativeInstructions &&
295 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
296 can_ubo = FALSE;
297 }
298
299 if (options->EmitNoLoops)
300 options->MaxUnrollIterations =
301 MIN2(screen->get_shader_param(screen, sh,
302 PIPE_SHADER_CAP_MAX_INSTRUCTIONS),
303 65536);
304 else
305 options->MaxUnrollIterations =
306 screen->get_shader_param(screen, sh,
307 PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT);
308
309 options->LowerClipDistance = true;
310 options->LowerBufferInterfaceBlocks = true;
311
312 if (sh == PIPE_SHADER_COMPUTE)
313 options->LowerShaderSharedVariables = true;
314 }
315
316 c->LowerTessLevel = true;
317
318 c->MaxCombinedTextureImageUnits =
319 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
320 c->Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits +
321 c->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits +
322 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
323 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits +
324 c->Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
325 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
326
327 /* This depends on program constants. */
328 c->MaxTextureCoordUnits
329 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
330 MAX_TEXTURE_COORD_UNITS);
331
332 c->MaxTextureUnits =
333 _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
334 c->MaxTextureCoordUnits);
335
336 c->Program[MESA_SHADER_VERTEX].MaxAttribs =
337 MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
338
339 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
340 * of inputs. It's always 2 colors + N generic inputs. */
341 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
342 PIPE_SHADER_CAP_MAX_INPUTS);
343 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
344 c->MaxGeometryOutputVertices =
345 screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
346 c->MaxGeometryTotalOutputComponents =
347 screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
348 c->MaxTessPatchComponents =
349 MAX2(screen->get_param(screen, PIPE_CAP_MAX_SHADER_PATCH_VARYINGS),
350 MAX_VARYING) * 4;
351
352 c->MinProgramTexelOffset =
353 screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
354 c->MaxProgramTexelOffset =
355 screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
356
357 c->MaxProgramTextureGatherComponents =
358 screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
359 c->MinProgramTextureGatherOffset =
360 screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
361 c->MaxProgramTextureGatherOffset =
362 screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
363
364 c->MaxTransformFeedbackBuffers =
365 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
366 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers,
367 MAX_FEEDBACK_BUFFERS);
368 c->MaxTransformFeedbackSeparateComponents =
369 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
370 c->MaxTransformFeedbackInterleavedComponents =
371 screen->get_param(screen,
372 PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
373 c->MaxVertexStreams =
374 MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));
375
376 /* The vertex stream must fit into pipe_stream_output_info::stream */
377 assert(c->MaxVertexStreams <= 4);
378
379 c->MaxVertexAttribStride
380 = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);
381
382 c->StripTextureBorder = GL_TRUE;
383
384 c->GLSLSkipStrictMaxUniformLimitCheck =
385 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
386
387 c->UniformBufferOffsetAlignment =
388 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
389
390 if (can_ubo) {
391 extensions->ARB_uniform_buffer_object = GL_TRUE;
392 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
393 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
394 c->Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks +
395 c->Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks +
396 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
397 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks +
398 c->Program[MESA_SHADER_COMPUTE].MaxUniformBlocks;
399 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
400 }
401
402 c->GLSLFragCoordIsSysVal =
403 screen->get_param(screen, PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL);
404 c->GLSLFrontFacingIsSysVal =
405 screen->get_param(screen, PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL);
406
407 c->MaxAtomicBufferBindings =
408 c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
409 c->MaxCombinedAtomicBuffers =
410 c->Program[MESA_SHADER_VERTEX].MaxAtomicBuffers +
411 c->Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers +
412 c->Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers +
413 c->Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers +
414 c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
415 assert(c->MaxCombinedAtomicBuffers <= MAX_COMBINED_ATOMIC_BUFFERS);
416
417 if (c->MaxCombinedAtomicBuffers > 0) {
418 extensions->ARB_shader_atomic_counters = GL_TRUE;
419 extensions->ARB_shader_atomic_counter_ops = GL_TRUE;
420 }
421
422 c->MaxCombinedShaderOutputResources = c->MaxDrawBuffers;
423 c->ShaderStorageBufferOffsetAlignment =
424 screen->get_param(screen, PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT);
425 if (c->ShaderStorageBufferOffsetAlignment) {
426 c->MaxCombinedShaderStorageBlocks = c->MaxShaderStorageBufferBindings =
427 c->MaxCombinedAtomicBuffers;
428 c->MaxCombinedShaderOutputResources +=
429 c->MaxCombinedShaderStorageBlocks;
430 c->MaxShaderStorageBlockSize = 1 << 27;
431 extensions->ARB_shader_storage_buffer_object = GL_TRUE;
432 }
433
434 c->MaxCombinedImageUniforms =
435 c->Program[MESA_SHADER_VERTEX].MaxImageUniforms +
436 c->Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms +
437 c->Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms +
438 c->Program[MESA_SHADER_GEOMETRY].MaxImageUniforms +
439 c->Program[MESA_SHADER_FRAGMENT].MaxImageUniforms +
440 c->Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
441 c->MaxCombinedShaderOutputResources += c->MaxCombinedImageUniforms;
442 c->MaxImageUnits = MAX_IMAGE_UNITS;
443 c->MaxImageSamples = 0; /* XXX */
444 if (c->MaxCombinedImageUniforms) {
445 extensions->ARB_shader_image_load_store = GL_TRUE;
446 extensions->ARB_shader_image_size = GL_TRUE;
447 }
448 }
449
450
451 /**
452 * Given a member \c x of struct gl_extensions, return offset of
453 * \c x in bytes.
454 */
455 #define o(x) offsetof(struct gl_extensions, x)
456
457
458 struct st_extension_cap_mapping {
459 int extension_offset;
460 int cap;
461 };
462
463 struct st_extension_format_mapping {
464 int extension_offset[2];
465 enum pipe_format format[32];
466
467 /* If TRUE, at least one format must be supported for the extensions to be
468 * advertised. If FALSE, all the formats must be supported. */
469 GLboolean need_at_least_one;
470 };
471
472 /**
473 * Enable extensions if certain pipe formats are supported by the driver.
474 * What extensions will be enabled and what formats must be supported is
475 * described by the array of st_extension_format_mapping.
476 *
477 * target and bind_flags are passed to is_format_supported.
478 */
479 static void
480 init_format_extensions(struct pipe_screen *screen,
481 struct gl_extensions *extensions,
482 const struct st_extension_format_mapping *mapping,
483 unsigned num_mappings,
484 enum pipe_texture_target target,
485 unsigned bind_flags)
486 {
487 GLboolean *extension_table = (GLboolean *) extensions;
488 unsigned i;
489 int j;
490 int num_formats = ARRAY_SIZE(mapping->format);
491 int num_ext = ARRAY_SIZE(mapping->extension_offset);
492
493 for (i = 0; i < num_mappings; i++) {
494 int num_supported = 0;
495
496 /* Examine each format in the list. */
497 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
498 if (screen->is_format_supported(screen, mapping[i].format[j],
499 target, 0, bind_flags)) {
500 num_supported++;
501 }
502 }
503
504 if (!num_supported ||
505 (!mapping[i].need_at_least_one && num_supported != j)) {
506 continue;
507 }
508
509 /* Enable all extensions in the list. */
510 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
511 extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
512 }
513 }
514
515
516 /**
517 * Given a list of formats and bind flags, return the maximum number
518 * of samples supported by any of those formats.
519 */
520 static unsigned
521 get_max_samples_for_formats(struct pipe_screen *screen,
522 unsigned num_formats,
523 enum pipe_format *formats,
524 unsigned max_samples,
525 unsigned bind)
526 {
527 unsigned i, f;
528
529 for (i = max_samples; i > 0; --i) {
530 for (f = 0; f < num_formats; f++) {
531 if (screen->is_format_supported(screen, formats[f],
532 PIPE_TEXTURE_2D, i, bind)) {
533 return i;
534 }
535 }
536 }
537 return 0;
538 }
539
540
541 /**
542 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
543 * which GL extensions are supported.
544 * Quite a few extensions are always supported because they are standard
545 * features or can be built on top of other gallium features.
546 * Some fine tuning may still be needed.
547 */
548 void st_init_extensions(struct pipe_screen *screen,
549 struct gl_constants *consts,
550 struct gl_extensions *extensions,
551 struct st_config_options *options,
552 boolean has_lib_dxtc)
553 {
554 unsigned i;
555 GLboolean *extension_table = (GLboolean *) extensions;
556
557 static const struct st_extension_cap_mapping cap_mapping[] = {
558 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
559 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
560 { o(ARB_clear_texture), PIPE_CAP_CLEAR_TEXTURE },
561 { o(ARB_clip_control), PIPE_CAP_CLIP_HALFZ },
562 { o(ARB_color_buffer_float), PIPE_CAP_VERTEX_COLOR_UNCLAMPED },
563 { o(ARB_conditional_render_inverted), PIPE_CAP_CONDITIONAL_RENDER_INVERTED },
564 { o(ARB_copy_image), PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS },
565 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
566 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
567 { o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
568 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
569 { o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
570 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
571 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
572 { o(ARB_framebuffer_object), PIPE_CAP_MIXED_FRAMEBUFFER_SIZES },
573 { o(ARB_indirect_parameters), PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS },
574 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
575 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
576 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
577 { o(ARB_pipeline_statistics_query), PIPE_CAP_QUERY_PIPELINE_STATISTICS },
578 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
579 { o(ARB_query_buffer_object), PIPE_CAP_QUERY_BUFFER_OBJECT },
580 { o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
581 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
582 { o(ARB_shader_draw_parameters), PIPE_CAP_DRAW_PARAMETERS },
583 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
584 { o(ARB_shader_texture_image_samples), PIPE_CAP_TGSI_TXQS },
585 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
586 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
587 { o(ARB_texture_buffer_object), PIPE_CAP_TEXTURE_BUFFER_OBJECTS },
588 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
589 { o(ARB_texture_gather), PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS },
590 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
591 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
592 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
593 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
594 { o(ARB_texture_view), PIPE_CAP_SAMPLER_VIEW_TARGET },
595 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
596 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
597 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
598
599 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
600 { o(EXT_depth_bounds_test), PIPE_CAP_DEPTH_BOUNDS_TEST },
601 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
602 { o(EXT_polygon_offset_clamp), PIPE_CAP_POLYGON_OFFSET_CLAMP },
603 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
604 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
605 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
606 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
607 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
608 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
609
610 { o(AMD_pinned_memory), PIPE_CAP_RESOURCE_FROM_USER_MEMORY },
611 { o(ATI_meminfo), PIPE_CAP_QUERY_MEMORY_INFO },
612 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
613 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
614 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
615 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
616 { o(NV_primitive_restart), PIPE_CAP_PRIMITIVE_RESTART },
617 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
618 { o(NVX_gpu_memory_info), PIPE_CAP_QUERY_MEMORY_INFO },
619 /* GL_NV_point_sprite is not supported by gallium because we don't
620 * support the GL_POINT_SPRITE_R_MODE_NV option. */
621
622 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
623 { o(OES_texture_float_linear), PIPE_CAP_TEXTURE_FLOAT_LINEAR },
624 { o(OES_texture_half_float_linear), PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR },
625 };
626
627 /* Required: render target and sampler support */
628 static const struct st_extension_format_mapping rendertarget_mapping[] = {
629 { { o(ARB_texture_float) },
630 { PIPE_FORMAT_R32G32B32A32_FLOAT,
631 PIPE_FORMAT_R16G16B16A16_FLOAT } },
632
633 { { o(OES_texture_float) },
634 { PIPE_FORMAT_R32G32B32A32_FLOAT } },
635
636 { { o(OES_texture_half_float) },
637 { PIPE_FORMAT_R16G16B16A16_FLOAT } },
638
639 { { o(ARB_texture_rgb10_a2ui) },
640 { PIPE_FORMAT_R10G10B10A2_UINT,
641 PIPE_FORMAT_B10G10R10A2_UINT },
642 GL_TRUE }, /* at least one format must be supported */
643
644 { { o(EXT_framebuffer_sRGB) },
645 { PIPE_FORMAT_A8B8G8R8_SRGB,
646 PIPE_FORMAT_B8G8R8A8_SRGB },
647 GL_TRUE }, /* at least one format must be supported */
648
649 { { o(EXT_packed_float) },
650 { PIPE_FORMAT_R11G11B10_FLOAT } },
651
652 { { o(EXT_texture_integer) },
653 { PIPE_FORMAT_R32G32B32A32_UINT,
654 PIPE_FORMAT_R32G32B32A32_SINT } },
655
656 { { o(ARB_texture_rg) },
657 { PIPE_FORMAT_R8_UNORM,
658 PIPE_FORMAT_R8G8_UNORM } },
659 };
660
661 /* Required: depth stencil and sampler support */
662 static const struct st_extension_format_mapping depthstencil_mapping[] = {
663 { { o(ARB_depth_buffer_float) },
664 { PIPE_FORMAT_Z32_FLOAT,
665 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
666 };
667
668 /* Required: sampler support */
669 static const struct st_extension_format_mapping texture_mapping[] = {
670 { { o(ARB_texture_compression_rgtc) },
671 { PIPE_FORMAT_RGTC1_UNORM,
672 PIPE_FORMAT_RGTC1_SNORM,
673 PIPE_FORMAT_RGTC2_UNORM,
674 PIPE_FORMAT_RGTC2_SNORM } },
675
676 { { o(EXT_texture_compression_latc) },
677 { PIPE_FORMAT_LATC1_UNORM,
678 PIPE_FORMAT_LATC1_SNORM,
679 PIPE_FORMAT_LATC2_UNORM,
680 PIPE_FORMAT_LATC2_SNORM } },
681
682 { { o(EXT_texture_compression_s3tc),
683 o(ANGLE_texture_compression_dxt) },
684 { PIPE_FORMAT_DXT1_RGB,
685 PIPE_FORMAT_DXT1_RGBA,
686 PIPE_FORMAT_DXT3_RGBA,
687 PIPE_FORMAT_DXT5_RGBA } },
688
689 { { o(ARB_texture_compression_bptc) },
690 { PIPE_FORMAT_BPTC_RGBA_UNORM,
691 PIPE_FORMAT_BPTC_SRGBA,
692 PIPE_FORMAT_BPTC_RGB_FLOAT,
693 PIPE_FORMAT_BPTC_RGB_UFLOAT } },
694
695 { { o(KHR_texture_compression_astc_ldr) },
696 { PIPE_FORMAT_ASTC_4x4,
697 PIPE_FORMAT_ASTC_5x4,
698 PIPE_FORMAT_ASTC_5x5,
699 PIPE_FORMAT_ASTC_6x5,
700 PIPE_FORMAT_ASTC_6x6,
701 PIPE_FORMAT_ASTC_8x5,
702 PIPE_FORMAT_ASTC_8x6,
703 PIPE_FORMAT_ASTC_8x8,
704 PIPE_FORMAT_ASTC_10x5,
705 PIPE_FORMAT_ASTC_10x6,
706 PIPE_FORMAT_ASTC_10x8,
707 PIPE_FORMAT_ASTC_10x10,
708 PIPE_FORMAT_ASTC_12x10,
709 PIPE_FORMAT_ASTC_12x12,
710 PIPE_FORMAT_ASTC_4x4_SRGB,
711 PIPE_FORMAT_ASTC_5x4_SRGB,
712 PIPE_FORMAT_ASTC_5x5_SRGB,
713 PIPE_FORMAT_ASTC_6x5_SRGB,
714 PIPE_FORMAT_ASTC_6x6_SRGB,
715 PIPE_FORMAT_ASTC_8x5_SRGB,
716 PIPE_FORMAT_ASTC_8x6_SRGB,
717 PIPE_FORMAT_ASTC_8x8_SRGB,
718 PIPE_FORMAT_ASTC_10x5_SRGB,
719 PIPE_FORMAT_ASTC_10x6_SRGB,
720 PIPE_FORMAT_ASTC_10x8_SRGB,
721 PIPE_FORMAT_ASTC_10x10_SRGB,
722 PIPE_FORMAT_ASTC_12x10_SRGB,
723 PIPE_FORMAT_ASTC_12x12_SRGB } },
724
725 { { o(EXT_texture_shared_exponent) },
726 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
727
728 { { o(EXT_texture_snorm) },
729 { PIPE_FORMAT_R8G8B8A8_SNORM } },
730
731 { { o(EXT_texture_sRGB),
732 o(EXT_texture_sRGB_decode) },
733 { PIPE_FORMAT_A8B8G8R8_SRGB,
734 PIPE_FORMAT_B8G8R8A8_SRGB },
735 GL_TRUE }, /* at least one format must be supported */
736
737 { { o(ATI_texture_compression_3dc) },
738 { PIPE_FORMAT_LATC2_UNORM } },
739
740 { { o(MESA_ycbcr_texture) },
741 { PIPE_FORMAT_UYVY,
742 PIPE_FORMAT_YUYV },
743 GL_TRUE }, /* at least one format must be supported */
744
745 { { o(OES_compressed_ETC1_RGB8_texture) },
746 { PIPE_FORMAT_ETC1_RGB8,
747 PIPE_FORMAT_R8G8B8A8_UNORM },
748 GL_TRUE }, /* at least one format must be supported */
749
750 { { o(ARB_stencil_texturing),
751 o(ARB_texture_stencil8) },
752 { PIPE_FORMAT_X24S8_UINT,
753 PIPE_FORMAT_S8X24_UINT },
754 GL_TRUE }, /* at least one format must be supported */
755 };
756
757 /* Required: vertex fetch support. */
758 static const struct st_extension_format_mapping vertex_mapping[] = {
759 { { o(ARB_vertex_type_2_10_10_10_rev) },
760 { PIPE_FORMAT_R10G10B10A2_UNORM,
761 PIPE_FORMAT_B10G10R10A2_UNORM,
762 PIPE_FORMAT_R10G10B10A2_SNORM,
763 PIPE_FORMAT_B10G10R10A2_SNORM,
764 PIPE_FORMAT_R10G10B10A2_USCALED,
765 PIPE_FORMAT_B10G10R10A2_USCALED,
766 PIPE_FORMAT_R10G10B10A2_SSCALED,
767 PIPE_FORMAT_B10G10R10A2_SSCALED } },
768 { { o(ARB_vertex_type_10f_11f_11f_rev) },
769 { PIPE_FORMAT_R11G11B10_FLOAT } },
770 };
771
772 static const struct st_extension_format_mapping tbo_rgb32[] = {
773 { {o(ARB_texture_buffer_object_rgb32) },
774 { PIPE_FORMAT_R32G32B32_FLOAT,
775 PIPE_FORMAT_R32G32B32_UINT,
776 PIPE_FORMAT_R32G32B32_SINT,
777 } },
778 };
779
780 /*
781 * Extensions that are supported by all Gallium drivers:
782 */
783 extensions->ARB_ES2_compatibility = GL_TRUE;
784 extensions->ARB_draw_elements_base_vertex = GL_TRUE;
785 extensions->ARB_explicit_attrib_location = GL_TRUE;
786 extensions->ARB_explicit_uniform_location = GL_TRUE;
787 extensions->ARB_fragment_coord_conventions = GL_TRUE;
788 extensions->ARB_fragment_program = GL_TRUE;
789 extensions->ARB_fragment_shader = GL_TRUE;
790 extensions->ARB_half_float_vertex = GL_TRUE;
791 extensions->ARB_internalformat_query = GL_TRUE;
792 extensions->ARB_internalformat_query2 = GL_TRUE;
793 extensions->ARB_map_buffer_range = GL_TRUE;
794 extensions->ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
795 extensions->ARB_texture_cube_map = GL_TRUE;
796 extensions->ARB_texture_env_combine = GL_TRUE;
797 extensions->ARB_texture_env_crossbar = GL_TRUE;
798 extensions->ARB_texture_env_dot3 = GL_TRUE;
799 extensions->ARB_vertex_program = GL_TRUE;
800 extensions->ARB_vertex_shader = GL_TRUE;
801
802 extensions->EXT_blend_color = GL_TRUE;
803 extensions->EXT_blend_func_separate = GL_TRUE;
804 extensions->EXT_blend_minmax = GL_TRUE;
805 extensions->EXT_gpu_program_parameters = GL_TRUE;
806 extensions->EXT_pixel_buffer_object = GL_TRUE;
807 extensions->EXT_point_parameters = GL_TRUE;
808 extensions->EXT_provoking_vertex = GL_TRUE;
809
810 extensions->EXT_texture_env_dot3 = GL_TRUE;
811 extensions->EXT_vertex_array_bgra = GL_TRUE;
812
813 extensions->ATI_fragment_shader = GL_TRUE;
814 extensions->ATI_texture_env_combine3 = GL_TRUE;
815
816 extensions->MESA_pack_invert = GL_TRUE;
817
818 extensions->NV_fog_distance = GL_TRUE;
819 extensions->NV_texture_env_combine4 = GL_TRUE;
820 extensions->NV_texture_rectangle = GL_TRUE;
821
822 extensions->OES_EGL_image = GL_TRUE;
823 extensions->OES_EGL_image_external = GL_TRUE;
824 extensions->OES_draw_texture = GL_TRUE;
825
826 /* Expose the extensions which directly correspond to gallium caps. */
827 for (i = 0; i < ARRAY_SIZE(cap_mapping); i++) {
828 if (screen->get_param(screen, cap_mapping[i].cap)) {
829 extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
830 }
831 }
832
833 /* Expose the extensions which directly correspond to gallium formats. */
834 init_format_extensions(screen, extensions, rendertarget_mapping,
835 ARRAY_SIZE(rendertarget_mapping), PIPE_TEXTURE_2D,
836 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
837 init_format_extensions(screen, extensions, depthstencil_mapping,
838 ARRAY_SIZE(depthstencil_mapping), PIPE_TEXTURE_2D,
839 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
840 init_format_extensions(screen, extensions, texture_mapping,
841 ARRAY_SIZE(texture_mapping), PIPE_TEXTURE_2D,
842 PIPE_BIND_SAMPLER_VIEW);
843 init_format_extensions(screen, extensions, vertex_mapping,
844 ARRAY_SIZE(vertex_mapping), PIPE_BUFFER,
845 PIPE_BIND_VERTEX_BUFFER);
846
847 /* Figure out GLSL support and set GLSLVersion to it. */
848 consts->GLSLVersion = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
849
850 _mesa_override_glsl_version(consts);
851
852 if (options->force_glsl_version > 0 &&
853 options->force_glsl_version <= consts->GLSLVersion) {
854 consts->ForceGLSLVersion = options->force_glsl_version;
855 }
856
857 if (consts->GLSLVersion >= 400)
858 extensions->ARB_gpu_shader5 = GL_TRUE;
859 if (consts->GLSLVersion >= 410)
860 extensions->ARB_shader_precision = GL_TRUE;
861
862 /* This extension needs full OpenGL 3.2, but we don't know if that's
863 * supported at this point. Only check the GLSL version. */
864 if (consts->GLSLVersion >= 150 &&
865 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
866 extensions->AMD_vertex_shader_layer = GL_TRUE;
867 }
868
869 if (consts->GLSLVersion >= 130) {
870 consts->NativeIntegers = GL_TRUE;
871 consts->MaxClipPlanes = 8;
872
873 if (screen->get_param(screen, PIPE_CAP_VERTEXID_NOBASE)) {
874 consts->VertexID_is_zero_based = GL_TRUE;
875 }
876
877 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
878 extensions->ARB_conservative_depth = GL_TRUE;
879 extensions->ARB_shading_language_packing = GL_TRUE;
880 extensions->OES_depth_texture_cube_map = GL_TRUE;
881 extensions->ARB_shading_language_420pack = GL_TRUE;
882 extensions->ARB_texture_query_levels = GL_TRUE;
883 extensions->ARB_shader_subroutine = GL_TRUE;
884
885 if (!options->disable_shader_bit_encoding) {
886 extensions->ARB_shader_bit_encoding = GL_TRUE;
887 }
888
889 extensions->EXT_shader_integer_mix = GL_TRUE;
890 extensions->ARB_arrays_of_arrays = GL_TRUE;
891 } else {
892 /* Optional integer support for GLSL 1.2. */
893 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
894 PIPE_SHADER_CAP_INTEGERS) &&
895 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
896 PIPE_SHADER_CAP_INTEGERS)) {
897 consts->NativeIntegers = GL_TRUE;
898
899 extensions->EXT_shader_integer_mix = GL_TRUE;
900 }
901
902 /* Integer textures make no sense before GLSL 1.30 */
903 extensions->EXT_texture_integer = GL_FALSE;
904 }
905
906 consts->UniformBooleanTrue = consts->NativeIntegers ? ~0U : fui(1.0f);
907
908 /* Below are the cases which cannot be moved into tables easily. */
909
910 if (!has_lib_dxtc && !options->force_s3tc_enable) {
911 extensions->EXT_texture_compression_s3tc = GL_FALSE;
912 extensions->ANGLE_texture_compression_dxt = GL_FALSE;
913 }
914
915 if (screen->get_shader_param(screen, PIPE_SHADER_TESS_CTRL,
916 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
917 extensions->ARB_tessellation_shader = GL_TRUE;
918 }
919
920 if (screen->fence_finish) {
921 extensions->ARB_sync = GL_TRUE;
922 }
923
924 /* Maximum sample count. */
925 {
926 enum pipe_format color_formats[] = {
927 PIPE_FORMAT_R8G8B8A8_UNORM,
928 PIPE_FORMAT_B8G8R8A8_UNORM,
929 PIPE_FORMAT_A8R8G8B8_UNORM,
930 PIPE_FORMAT_A8B8G8R8_UNORM,
931 };
932 enum pipe_format depth_formats[] = {
933 PIPE_FORMAT_Z16_UNORM,
934 PIPE_FORMAT_Z24X8_UNORM,
935 PIPE_FORMAT_X8Z24_UNORM,
936 PIPE_FORMAT_Z32_UNORM,
937 PIPE_FORMAT_Z32_FLOAT
938 };
939 enum pipe_format int_formats[] = {
940 PIPE_FORMAT_R8G8B8A8_SINT
941 };
942
943 consts->MaxSamples =
944 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
945 color_formats, 16,
946 PIPE_BIND_RENDER_TARGET);
947
948 consts->MaxColorTextureSamples =
949 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
950 color_formats, consts->MaxSamples,
951 PIPE_BIND_SAMPLER_VIEW);
952
953 consts->MaxDepthTextureSamples =
954 get_max_samples_for_formats(screen, ARRAY_SIZE(depth_formats),
955 depth_formats, consts->MaxSamples,
956 PIPE_BIND_SAMPLER_VIEW);
957
958 consts->MaxIntegerSamples =
959 get_max_samples_for_formats(screen, ARRAY_SIZE(int_formats),
960 int_formats, consts->MaxSamples,
961 PIPE_BIND_SAMPLER_VIEW);
962 }
963 if (consts->MaxSamples == 1) {
964 /* one sample doesn't really make sense */
965 consts->MaxSamples = 0;
966 }
967 else if (consts->MaxSamples >= 2) {
968 extensions->EXT_framebuffer_multisample = GL_TRUE;
969 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
970 }
971
972 if (consts->MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
973 consts->FakeSWMSAA = GL_TRUE;
974 extensions->EXT_framebuffer_multisample = GL_TRUE;
975 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
976 extensions->ARB_texture_multisample = GL_TRUE;
977 }
978
979 if (consts->MaxDualSourceDrawBuffers > 0 &&
980 !options->disable_blend_func_extended)
981 extensions->ARB_blend_func_extended = GL_TRUE;
982
983 if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
984 extensions->ARB_timer_query) {
985 extensions->EXT_timer_query = GL_TRUE;
986 }
987
988 if (extensions->ARB_transform_feedback2 &&
989 extensions->ARB_draw_instanced) {
990 extensions->ARB_transform_feedback_instanced = GL_TRUE;
991 }
992 if (options->force_glsl_extensions_warn)
993 consts->ForceGLSLExtensionsWarn = 1;
994
995 if (options->disable_glsl_line_continuations)
996 consts->DisableGLSLLineContinuations = 1;
997
998 if (options->allow_glsl_extension_directive_midshader)
999 consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
1000
1001 consts->MinMapBufferAlignment =
1002 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
1003
1004 if (extensions->ARB_texture_buffer_object) {
1005 consts->MaxTextureBufferSize =
1006 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
1007 (1u << 31) - 1);
1008 consts->TextureBufferOffsetAlignment =
1009 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
1010
1011 if (consts->TextureBufferOffsetAlignment)
1012 extensions->ARB_texture_buffer_range = GL_TRUE;
1013
1014 init_format_extensions(screen, extensions, tbo_rgb32,
1015 ARRAY_SIZE(tbo_rgb32), PIPE_BUFFER,
1016 PIPE_BIND_SAMPLER_VIEW);
1017 }
1018
1019 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
1020 * If the number of available texture indirections is very limited, then we
1021 * prefer to disable varying packing rather than run the risk of varying
1022 * packing preventing a shader from running.
1023 */
1024 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
1025 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
1026 /* We can't disable varying packing if transform feedback is available,
1027 * because transform feedback code assumes a packed varying layout.
1028 */
1029 if (!extensions->EXT_transform_feedback)
1030 consts->DisableVaryingPacking = GL_TRUE;
1031 }
1032
1033 consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
1034 if (consts->MaxViewports >= 16) {
1035 if (consts->GLSLVersion >= 400) {
1036 consts->ViewportBounds.Min = -32768.0;
1037 consts->ViewportBounds.Max = 32767.0;
1038 } else {
1039 consts->ViewportBounds.Min = -16384.0;
1040 consts->ViewportBounds.Max = 16383.0;
1041 }
1042 extensions->ARB_viewport_array = GL_TRUE;
1043 extensions->ARB_fragment_layer_viewport = GL_TRUE;
1044 if (extensions->AMD_vertex_shader_layer)
1045 extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
1046 }
1047
1048 /* GL_ARB_ES3_compatibility.
1049 *
1050 * Assume that ES3 is supported if GLSL 3.30 is supported.
1051 * (OpenGL 3.3 is a requirement for that extension.)
1052 */
1053 if (consts->GLSLVersion >= 330 &&
1054 /* Requirements for ETC2 emulation. */
1055 screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
1056 PIPE_TEXTURE_2D, 0,
1057 PIPE_BIND_SAMPLER_VIEW) &&
1058 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
1059 PIPE_TEXTURE_2D, 0,
1060 PIPE_BIND_SAMPLER_VIEW) &&
1061 screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
1062 PIPE_TEXTURE_2D, 0,
1063 PIPE_BIND_SAMPLER_VIEW) &&
1064 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
1065 PIPE_TEXTURE_2D, 0,
1066 PIPE_BIND_SAMPLER_VIEW) &&
1067 screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
1068 PIPE_TEXTURE_2D, 0,
1069 PIPE_BIND_SAMPLER_VIEW) &&
1070 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
1071 PIPE_TEXTURE_2D, 0,
1072 PIPE_BIND_SAMPLER_VIEW)) {
1073 extensions->ARB_ES3_compatibility = GL_TRUE;
1074 }
1075
1076 #ifdef HAVE_ST_VDPAU
1077 if (screen->get_video_param &&
1078 screen->get_video_param(screen, PIPE_VIDEO_PROFILE_UNKNOWN,
1079 PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
1080 PIPE_VIDEO_CAP_SUPPORTS_INTERLACED)) {
1081 extensions->NV_vdpau_interop = GL_TRUE;
1082 }
1083 #endif
1084
1085 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
1086 PIPE_SHADER_CAP_DOUBLES) &&
1087 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
1088 PIPE_SHADER_CAP_DOUBLES)) {
1089 extensions->ARB_gpu_shader_fp64 = GL_TRUE;
1090 extensions->ARB_vertex_attrib_64bit = GL_TRUE;
1091 }
1092
1093 if ((ST_DEBUG & DEBUG_GREMEDY) &&
1094 screen->get_param(screen, PIPE_CAP_STRING_MARKER))
1095 extensions->GREMEDY_string_marker = GL_TRUE;
1096
1097 if (screen->get_param(screen, PIPE_CAP_COMPUTE)) {
1098 int compute_supported_irs =
1099 screen->get_shader_param(screen, PIPE_SHADER_COMPUTE,
1100 PIPE_SHADER_CAP_SUPPORTED_IRS);
1101 if (compute_supported_irs & (1 << PIPE_SHADER_IR_TGSI)) {
1102 uint64_t grid_size[3], block_size[3];
1103
1104 screen->get_compute_param(screen, PIPE_COMPUTE_CAP_MAX_GRID_SIZE,
1105 grid_size);
1106 screen->get_compute_param(screen, PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE,
1107 block_size);
1108 screen->get_compute_param(screen,
1109 PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK,
1110 &consts->MaxComputeWorkGroupInvocations);
1111 screen->get_compute_param(screen, PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE,
1112 &consts->MaxComputeSharedMemorySize);
1113
1114 for (i = 0; i < 3; i++) {
1115 consts->MaxComputeWorkGroupCount[i] = grid_size[i];
1116 consts->MaxComputeWorkGroupSize[i] = block_size[i];
1117 }
1118 /* XXX: ARB_compute_shader is not enabled by default because images
1119 * support is still not implemented yet. */
1120 /* extensions->ARB_compute_shader = true; */
1121 }
1122 }
1123 }