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mesa: add GLSLVersionCompat constant
[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 "compiler/nir/nir.h"
30
31 #include "main/imports.h"
32 #include "main/context.h"
33 #include "main/macros.h"
34 #include "main/version.h"
35
36 #include "pipe/p_context.h"
37 #include "pipe/p_defines.h"
38 #include "pipe/p_screen.h"
39 #include "tgsi/tgsi_from_mesa.h"
40 #include "util/u_math.h"
41
42 #include "st_context.h"
43 #include "st_debug.h"
44 #include "st_extensions.h"
45 #include "st_format.h"
46
47
48 /*
49 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
50 * avoid evaluating arguments (which are often function calls) more than once.
51 */
52
53 static unsigned _min(unsigned a, unsigned b)
54 {
55 return (a < b) ? a : b;
56 }
57
58 static float _maxf(float a, float b)
59 {
60 return (a > b) ? a : b;
61 }
62
63 static int _clamp(int a, int min, int max)
64 {
65 if (a < min)
66 return min;
67 else if (a > max)
68 return max;
69 else
70 return a;
71 }
72
73
74 /**
75 * Query driver to get implementation limits.
76 * Note that we have to limit/clamp against Mesa's internal limits too.
77 */
78 void st_init_limits(struct pipe_screen *screen,
79 struct gl_constants *c, struct gl_extensions *extensions,
80 gl_api api)
81 {
82 int supported_irs;
83 unsigned sh;
84 boolean can_ubo = TRUE;
85 int temp;
86 bool ssbo_atomic = true;
87
88 c->MaxTextureLevels
89 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
90 MAX_TEXTURE_LEVELS);
91
92 c->Max3DTextureLevels
93 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
94 MAX_3D_TEXTURE_LEVELS);
95
96 c->MaxCubeTextureLevels
97 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
98 MAX_CUBE_TEXTURE_LEVELS);
99
100 c->MaxTextureRectSize
101 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
102
103 c->MaxArrayTextureLayers
104 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
105
106 /* Define max viewport size and max renderbuffer size in terms of
107 * max texture size (note: max tex RECT size = max tex 2D size).
108 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
109 */
110 c->MaxViewportWidth =
111 c->MaxViewportHeight =
112 c->MaxRenderbufferSize = c->MaxTextureRectSize;
113
114 c->ViewportSubpixelBits =
115 screen->get_param(screen, PIPE_CAP_VIEWPORT_SUBPIXEL_BITS);
116
117 c->MaxDrawBuffers = c->MaxColorAttachments =
118 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
119 1, MAX_DRAW_BUFFERS);
120
121 c->MaxDualSourceDrawBuffers =
122 _clamp(screen->get_param(screen,
123 PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
124 0, MAX_DRAW_BUFFERS);
125
126 c->MaxLineWidth =
127 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH));
128 c->MaxLineWidthAA =
129 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH_AA));
130
131 c->MaxPointSize =
132 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH));
133 c->MaxPointSizeAA =
134 _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH_AA));
135
136 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
137 * for non-aa sizes, but we can go down to 0.0 for aa points.
138 */
139 c->MinPointSize = 1.0f;
140 c->MinPointSizeAA = 0.0f;
141
142 c->MaxTextureMaxAnisotropy =
143 _maxf(2.0f,
144 screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
145
146 c->MaxTextureLodBias =
147 screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
148
149 c->QuadsFollowProvokingVertexConvention =
150 screen->get_param(screen,
151 PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
152
153 c->MaxUniformBlockSize =
154 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
155 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE);
156 if (c->MaxUniformBlockSize < 16384) {
157 can_ubo = FALSE;
158 }
159
160 for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
161 struct gl_shader_compiler_options *options;
162 struct gl_program_constants *pc;
163 const nir_shader_compiler_options *nir_options = NULL;
164
165 if (screen->get_compiler_options) {
166 nir_options = (const nir_shader_compiler_options *)
167 screen->get_compiler_options(screen, PIPE_SHADER_IR_NIR, sh);
168 }
169
170 const gl_shader_stage stage = tgsi_processor_to_shader_stage(sh);
171 pc = &c->Program[stage];
172 options = &c->ShaderCompilerOptions[stage];
173 c->ShaderCompilerOptions[stage].NirOptions = nir_options;
174
175 if (sh == PIPE_SHADER_COMPUTE) {
176 if (!screen->get_param(screen, PIPE_CAP_COMPUTE))
177 continue;
178 supported_irs =
179 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUPPORTED_IRS);
180 if (!(supported_irs & (1 << PIPE_SHADER_IR_TGSI)))
181 continue;
182 }
183
184 pc->MaxTextureImageUnits =
185 _min(screen->get_shader_param(screen, sh,
186 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
187 MAX_TEXTURE_IMAGE_UNITS);
188
189 pc->MaxInstructions =
190 pc->MaxNativeInstructions =
191 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
192 pc->MaxAluInstructions =
193 pc->MaxNativeAluInstructions =
194 screen->get_shader_param(screen, sh,
195 PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
196 pc->MaxTexInstructions =
197 pc->MaxNativeTexInstructions =
198 screen->get_shader_param(screen, sh,
199 PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
200 pc->MaxTexIndirections =
201 pc->MaxNativeTexIndirections =
202 screen->get_shader_param(screen, sh,
203 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
204 pc->MaxAttribs =
205 pc->MaxNativeAttribs =
206 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
207 pc->MaxTemps =
208 pc->MaxNativeTemps =
209 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
210 pc->MaxAddressRegs =
211 pc->MaxNativeAddressRegs = sh == PIPE_SHADER_VERTEX ? 1 : 0;
212 pc->MaxParameters =
213 pc->MaxNativeParameters =
214 screen->get_shader_param(screen, sh,
215 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
216 pc->MaxInputComponents =
217 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS) * 4;
218 pc->MaxOutputComponents =
219 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_OUTPUTS) * 4;
220
221 pc->MaxUniformComponents =
222 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
223
224 pc->MaxUniformBlocks =
225 screen->get_shader_param(screen, sh,
226 PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
227 if (pc->MaxUniformBlocks)
228 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
229 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
230
231 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
232 c->MaxUniformBlockSize / 4 *
233 pc->MaxUniformBlocks);
234
235 temp = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS);
236 if (temp) {
237 /*
238 * for separate atomic counters get the actual hw limits
239 * per stage on atomic counters and buffers
240 */
241 ssbo_atomic = false;
242 pc->MaxAtomicCounters = temp;
243 pc->MaxAtomicBuffers = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS);
244 pc->MaxShaderStorageBlocks = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS);
245 } else {
246 pc->MaxAtomicCounters = MAX_ATOMIC_COUNTERS;
247 pc->MaxAtomicBuffers = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS) / 2;
248 pc->MaxShaderStorageBlocks = pc->MaxAtomicBuffers;
249 }
250 pc->MaxImageUniforms = screen->get_shader_param(
251 screen, sh, PIPE_SHADER_CAP_MAX_SHADER_IMAGES);
252
253 /* Gallium doesn't really care about local vs. env parameters so use the
254 * same limits.
255 */
256 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
257 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
258
259 if (screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INTEGERS)) {
260 pc->LowInt.RangeMin = 31;
261 pc->LowInt.RangeMax = 30;
262 pc->LowInt.Precision = 0;
263 pc->MediumInt = pc->HighInt = pc->LowInt;
264 }
265
266 /* TODO: make these more fine-grained if anyone needs it */
267 options->MaxIfDepth =
268 screen->get_shader_param(screen, sh,
269 PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
270 options->EmitNoLoops =
271 !screen->get_shader_param(screen, sh,
272 PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
273 options->EmitNoMainReturn =
274 !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
275
276 options->EmitNoCont =
277 !screen->get_shader_param(screen, sh,
278 PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
279
280 options->EmitNoIndirectInput =
281 !screen->get_shader_param(screen, sh,
282 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
283 options->EmitNoIndirectOutput =
284 !screen->get_shader_param(screen, sh,
285 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
286 options->EmitNoIndirectTemp =
287 !screen->get_shader_param(screen, sh,
288 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
289 options->EmitNoIndirectUniform =
290 !screen->get_shader_param(screen, sh,
291 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
292
293 if (pc->MaxNativeInstructions &&
294 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
295 can_ubo = FALSE;
296 }
297
298 if (options->EmitNoLoops)
299 options->MaxUnrollIterations =
300 MIN2(screen->get_shader_param(screen, sh,
301 PIPE_SHADER_CAP_MAX_INSTRUCTIONS),
302 65536);
303 else
304 options->MaxUnrollIterations =
305 screen->get_shader_param(screen, sh,
306 PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT);
307
308 options->LowerCombinedClipCullDistance = true;
309 options->LowerBufferInterfaceBlocks = true;
310 }
311
312 c->GLSLOptimizeConservatively =
313 screen->get_param(screen, PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY);
314 c->LowerTessLevel = true;
315 c->LowerCsDerivedVariables = true;
316 c->PrimitiveRestartForPatches =
317 screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES);
318
319 c->MaxCombinedTextureImageUnits =
320 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
321 c->Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits +
322 c->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits +
323 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
324 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits +
325 c->Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
326 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
327
328 /* This depends on program constants. */
329 c->MaxTextureCoordUnits
330 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
331 MAX_TEXTURE_COORD_UNITS);
332
333 c->MaxTextureUnits =
334 _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
335 c->MaxTextureCoordUnits);
336
337 c->Program[MESA_SHADER_VERTEX].MaxAttribs =
338 MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
339
340 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
341 * of inputs. It's always 2 colors + N generic inputs. */
342 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
343 PIPE_SHADER_CAP_MAX_INPUTS);
344 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
345 c->MaxGeometryOutputVertices =
346 screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
347 c->MaxGeometryTotalOutputComponents =
348 screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
349 c->MaxTessPatchComponents =
350 MIN2(screen->get_param(screen, PIPE_CAP_MAX_SHADER_PATCH_VARYINGS),
351 MAX_VARYING) * 4;
352
353 c->MinProgramTexelOffset =
354 screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
355 c->MaxProgramTexelOffset =
356 screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
357
358 c->MaxProgramTextureGatherComponents =
359 screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
360 c->MinProgramTextureGatherOffset =
361 screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
362 c->MaxProgramTextureGatherOffset =
363 screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
364
365 c->MaxTransformFeedbackBuffers =
366 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
367 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers,
368 MAX_FEEDBACK_BUFFERS);
369 c->MaxTransformFeedbackSeparateComponents =
370 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
371 c->MaxTransformFeedbackInterleavedComponents =
372 screen->get_param(screen,
373 PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
374 c->MaxVertexStreams =
375 MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));
376
377 /* The vertex stream must fit into pipe_stream_output_info::stream */
378 assert(c->MaxVertexStreams <= 4);
379
380 c->MaxVertexAttribStride
381 = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);
382
383 c->StripTextureBorder = GL_TRUE;
384
385 c->GLSLSkipStrictMaxUniformLimitCheck =
386 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
387
388 c->UniformBufferOffsetAlignment =
389 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
390
391 if (can_ubo) {
392 extensions->ARB_uniform_buffer_object = GL_TRUE;
393 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
394 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
395 c->Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks +
396 c->Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks +
397 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
398 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks +
399 c->Program[MESA_SHADER_COMPUTE].MaxUniformBlocks;
400 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
401 }
402
403 c->GLSLFragCoordIsSysVal =
404 screen->get_param(screen, PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL);
405 c->GLSLFrontFacingIsSysVal =
406 screen->get_param(screen, PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL);
407
408 /* GL_ARB_get_program_binary
409 *
410 * The QT framework has a bug in their shader program cache, which is built
411 * on GL_ARB_get_program_binary. In an effort to allow them to fix the bug
412 * we don't enable more than 1 binary format for compatibility profiles.
413 */
414 if (api != API_OPENGL_COMPAT &&
415 screen->get_disk_shader_cache && screen->get_disk_shader_cache(screen))
416 c->NumProgramBinaryFormats = 1;
417
418 c->MaxAtomicBufferBindings =
419 c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
420
421 if (!ssbo_atomic) {
422 /* for separate atomic buffers - there atomic buffer size will be
423 limited */
424 c->MaxAtomicBufferSize = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters * ATOMIC_COUNTER_SIZE;
425 /* on all HW with separate atomic (evergreen) the following
426 lines are true. not sure it's worth adding CAPs for this at this
427 stage. */
428 c->MaxCombinedAtomicCounters = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
429 c->MaxCombinedAtomicBuffers = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
430 } else {
431 c->MaxCombinedAtomicBuffers =
432 c->Program[MESA_SHADER_VERTEX].MaxAtomicBuffers +
433 c->Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers +
434 c->Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers +
435 c->Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers +
436 c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
437 assert(c->MaxCombinedAtomicBuffers <= MAX_COMBINED_ATOMIC_BUFFERS);
438 }
439
440 if (c->MaxCombinedAtomicBuffers > 0) {
441 extensions->ARB_shader_atomic_counters = GL_TRUE;
442 extensions->ARB_shader_atomic_counter_ops = GL_TRUE;
443 }
444
445 c->MaxCombinedShaderOutputResources = c->MaxDrawBuffers;
446 c->ShaderStorageBufferOffsetAlignment =
447 screen->get_param(screen, PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT);
448 if (c->ShaderStorageBufferOffsetAlignment) {
449 /* for hw atomic counters leaves these at default for now */
450 if (ssbo_atomic)
451 c->MaxCombinedShaderStorageBlocks = c->MaxShaderStorageBufferBindings =
452 c->MaxCombinedAtomicBuffers;
453 c->MaxCombinedShaderOutputResources +=
454 c->MaxCombinedShaderStorageBlocks;
455 c->MaxShaderStorageBlockSize = 1 << 27;
456 extensions->ARB_shader_storage_buffer_object = GL_TRUE;
457 }
458
459 c->MaxCombinedImageUniforms =
460 c->Program[MESA_SHADER_VERTEX].MaxImageUniforms +
461 c->Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms +
462 c->Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms +
463 c->Program[MESA_SHADER_GEOMETRY].MaxImageUniforms +
464 c->Program[MESA_SHADER_FRAGMENT].MaxImageUniforms +
465 c->Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
466 c->MaxCombinedShaderOutputResources += c->MaxCombinedImageUniforms;
467 c->MaxImageUnits = MAX_IMAGE_UNITS;
468 if (c->MaxCombinedImageUniforms) {
469 extensions->ARB_shader_image_load_store = GL_TRUE;
470 extensions->ARB_shader_image_size = GL_TRUE;
471 }
472
473 /* ARB_framebuffer_no_attachments */
474 c->MaxFramebufferWidth = c->MaxViewportWidth;
475 c->MaxFramebufferHeight = c->MaxViewportHeight;
476 /* NOTE: we cheat here a little by assuming that
477 * PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS has the same
478 * number of layers as we need, although we technically
479 * could have more the generality is not really useful
480 * in practicality.
481 */
482 c->MaxFramebufferLayers =
483 screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
484
485 c->MaxWindowRectangles =
486 screen->get_param(screen, PIPE_CAP_MAX_WINDOW_RECTANGLES);
487
488 c->SparseBufferPageSize =
489 screen->get_param(screen, PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE);
490
491 c->AllowMappedBuffersDuringExecution =
492 screen->get_param(screen, PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION);
493
494 c->UseSTD430AsDefaultPacking =
495 screen->get_param(screen, PIPE_CAP_LOAD_CONSTBUF);
496
497 c->MaxSubpixelPrecisionBiasBits =
498 screen->get_param(screen, PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS);
499
500 c->ConservativeRasterDilateRange[0] =
501 screen->get_paramf(screen, PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE);
502 c->ConservativeRasterDilateRange[1] =
503 screen->get_paramf(screen, PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE);
504 c->ConservativeRasterDilateGranularity =
505 screen->get_paramf(screen, PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY);
506
507 /* limit the max combined shader output resources to a driver limit */
508 temp = screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES);
509 if (temp > 0 && c->MaxCombinedShaderOutputResources > temp)
510 c->MaxCombinedShaderOutputResources = temp;
511 }
512
513
514 /**
515 * Given a member \c x of struct gl_extensions, return offset of
516 * \c x in bytes.
517 */
518 #define o(x) offsetof(struct gl_extensions, x)
519
520
521 struct st_extension_cap_mapping {
522 int extension_offset;
523 int cap;
524 };
525
526 struct st_extension_format_mapping {
527 int extension_offset[2];
528 enum pipe_format format[32];
529
530 /* If TRUE, at least one format must be supported for the extensions to be
531 * advertised. If FALSE, all the formats must be supported. */
532 GLboolean need_at_least_one;
533 };
534
535 /**
536 * Enable extensions if certain pipe formats are supported by the driver.
537 * What extensions will be enabled and what formats must be supported is
538 * described by the array of st_extension_format_mapping.
539 *
540 * target and bind_flags are passed to is_format_supported.
541 */
542 static void
543 init_format_extensions(struct pipe_screen *screen,
544 struct gl_extensions *extensions,
545 const struct st_extension_format_mapping *mapping,
546 unsigned num_mappings,
547 enum pipe_texture_target target,
548 unsigned bind_flags)
549 {
550 GLboolean *extension_table = (GLboolean *) extensions;
551 unsigned i;
552 int j;
553 int num_formats = ARRAY_SIZE(mapping->format);
554 int num_ext = ARRAY_SIZE(mapping->extension_offset);
555
556 for (i = 0; i < num_mappings; i++) {
557 int num_supported = 0;
558
559 /* Examine each format in the list. */
560 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
561 if (screen->is_format_supported(screen, mapping[i].format[j],
562 target, 0, bind_flags)) {
563 num_supported++;
564 }
565 }
566
567 if (!num_supported ||
568 (!mapping[i].need_at_least_one && num_supported != j)) {
569 continue;
570 }
571
572 /* Enable all extensions in the list. */
573 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
574 extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
575 }
576 }
577
578
579 /**
580 * Given a list of formats and bind flags, return the maximum number
581 * of samples supported by any of those formats.
582 */
583 static unsigned
584 get_max_samples_for_formats(struct pipe_screen *screen,
585 unsigned num_formats,
586 const enum pipe_format *formats,
587 unsigned max_samples,
588 unsigned bind)
589 {
590 unsigned i, f;
591
592 for (i = max_samples; i > 0; --i) {
593 for (f = 0; f < num_formats; f++) {
594 if (screen->is_format_supported(screen, formats[f],
595 PIPE_TEXTURE_2D, i, bind)) {
596 return i;
597 }
598 }
599 }
600 return 0;
601 }
602
603
604 /**
605 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
606 * which GL extensions are supported.
607 * Quite a few extensions are always supported because they are standard
608 * features or can be built on top of other gallium features.
609 * Some fine tuning may still be needed.
610 */
611 void st_init_extensions(struct pipe_screen *screen,
612 struct gl_constants *consts,
613 struct gl_extensions *extensions,
614 struct st_config_options *options,
615 gl_api api)
616 {
617 unsigned i;
618 GLboolean *extension_table = (GLboolean *) extensions;
619
620 static const struct st_extension_cap_mapping cap_mapping[] = {
621 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
622 { o(ARB_bindless_texture), PIPE_CAP_BINDLESS_TEXTURE },
623 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
624 { o(ARB_clear_texture), PIPE_CAP_CLEAR_TEXTURE },
625 { o(ARB_clip_control), PIPE_CAP_CLIP_HALFZ },
626 { o(ARB_color_buffer_float), PIPE_CAP_VERTEX_COLOR_UNCLAMPED },
627 { o(ARB_conditional_render_inverted), PIPE_CAP_CONDITIONAL_RENDER_INVERTED },
628 { o(ARB_copy_image), PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS },
629 { o(OES_copy_image), PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS },
630 { o(ARB_cull_distance), PIPE_CAP_CULL_DISTANCE },
631 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
632 { o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
633 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
634 { o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
635 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
636 { o(ARB_framebuffer_object), PIPE_CAP_MIXED_FRAMEBUFFER_SIZES },
637 { o(ARB_gpu_shader_int64), PIPE_CAP_INT64 },
638 { o(ARB_indirect_parameters), PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS },
639 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
640 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
641 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
642 { o(ARB_pipeline_statistics_query), PIPE_CAP_QUERY_PIPELINE_STATISTICS },
643 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
644 { o(ARB_polygon_offset_clamp), PIPE_CAP_POLYGON_OFFSET_CLAMP },
645 { o(ARB_post_depth_coverage), PIPE_CAP_POST_DEPTH_COVERAGE },
646 { o(ARB_query_buffer_object), PIPE_CAP_QUERY_BUFFER_OBJECT },
647 { o(ARB_robust_buffer_access_behavior), PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR },
648 { o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
649 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
650 { o(ARB_shader_ballot), PIPE_CAP_TGSI_BALLOT },
651 { o(ARB_shader_clock), PIPE_CAP_TGSI_CLOCK },
652 { o(ARB_shader_draw_parameters), PIPE_CAP_DRAW_PARAMETERS },
653 { o(ARB_shader_group_vote), PIPE_CAP_TGSI_VOTE },
654 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
655 { o(ARB_shader_texture_image_samples), PIPE_CAP_TGSI_TXQS },
656 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
657 { o(ARB_sparse_buffer), PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE },
658 { o(ARB_texture_buffer_object), PIPE_CAP_TEXTURE_BUFFER_OBJECTS },
659 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
660 { o(ARB_texture_gather), PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS },
661 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
662 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
663 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
664 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
665 { o(ARB_texture_view), PIPE_CAP_SAMPLER_VIEW_TARGET },
666 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
667 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
668 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS },
669 { o(ARB_transform_feedback_overflow_query), PIPE_CAP_QUERY_SO_OVERFLOW },
670
671 { o(KHR_blend_equation_advanced), PIPE_CAP_TGSI_FS_FBFETCH },
672
673 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
674 { o(EXT_depth_bounds_test), PIPE_CAP_DEPTH_BOUNDS_TEST },
675 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
676 { o(EXT_memory_object), PIPE_CAP_MEMOBJ },
677 { o(EXT_memory_object_fd), PIPE_CAP_MEMOBJ },
678 { o(EXT_semaphore), PIPE_CAP_FENCE_SIGNAL },
679 { o(EXT_semaphore_fd), PIPE_CAP_FENCE_SIGNAL },
680 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
681 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
682 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
683 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
684 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
685 { o(EXT_window_rectangles), PIPE_CAP_MAX_WINDOW_RECTANGLES },
686
687 { o(AMD_pinned_memory), PIPE_CAP_RESOURCE_FROM_USER_MEMORY },
688 { o(ATI_meminfo), PIPE_CAP_QUERY_MEMORY_INFO },
689 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
690 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
691 { o(MESA_tile_raster_order), PIPE_CAP_TILE_RASTER_ORDER },
692 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
693 { o(NV_fill_rectangle), PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE },
694 { o(NV_primitive_restart), PIPE_CAP_PRIMITIVE_RESTART },
695 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
696 { o(NVX_gpu_memory_info), PIPE_CAP_QUERY_MEMORY_INFO },
697 /* GL_NV_point_sprite is not supported by gallium because we don't
698 * support the GL_POINT_SPRITE_R_MODE_NV option. */
699
700 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
701 { o(OES_texture_float_linear), PIPE_CAP_TEXTURE_FLOAT_LINEAR },
702 { o(OES_texture_half_float_linear), PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR },
703 };
704
705 /* Required: render target and sampler support */
706 static const struct st_extension_format_mapping rendertarget_mapping[] = {
707 { { o(ARB_texture_float) },
708 { PIPE_FORMAT_R32G32B32A32_FLOAT,
709 PIPE_FORMAT_R16G16B16A16_FLOAT } },
710
711 { { o(OES_texture_float) },
712 { PIPE_FORMAT_R32G32B32A32_FLOAT } },
713
714 { { o(OES_texture_half_float) },
715 { PIPE_FORMAT_R16G16B16A16_FLOAT } },
716
717 { { o(ARB_texture_rgb10_a2ui) },
718 { PIPE_FORMAT_R10G10B10A2_UINT,
719 PIPE_FORMAT_B10G10R10A2_UINT },
720 GL_TRUE }, /* at least one format must be supported */
721
722 { { o(EXT_framebuffer_sRGB) },
723 { PIPE_FORMAT_A8B8G8R8_SRGB,
724 PIPE_FORMAT_B8G8R8A8_SRGB,
725 PIPE_FORMAT_R8G8B8A8_SRGB },
726 GL_TRUE }, /* at least one format must be supported */
727
728 { { o(EXT_packed_float) },
729 { PIPE_FORMAT_R11G11B10_FLOAT } },
730
731 { { o(EXT_texture_integer) },
732 { PIPE_FORMAT_R32G32B32A32_UINT,
733 PIPE_FORMAT_R32G32B32A32_SINT } },
734
735 { { o(ARB_texture_rg) },
736 { PIPE_FORMAT_R8_UNORM,
737 PIPE_FORMAT_R8G8_UNORM } },
738 };
739
740 /* Required: depth stencil and sampler support */
741 static const struct st_extension_format_mapping depthstencil_mapping[] = {
742 { { o(ARB_depth_buffer_float) },
743 { PIPE_FORMAT_Z32_FLOAT,
744 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
745 };
746
747 /* Required: sampler support */
748 static const struct st_extension_format_mapping texture_mapping[] = {
749 { { o(ARB_texture_compression_rgtc) },
750 { PIPE_FORMAT_RGTC1_UNORM,
751 PIPE_FORMAT_RGTC1_SNORM,
752 PIPE_FORMAT_RGTC2_UNORM,
753 PIPE_FORMAT_RGTC2_SNORM } },
754
755 { { o(EXT_texture_compression_latc) },
756 { PIPE_FORMAT_LATC1_UNORM,
757 PIPE_FORMAT_LATC1_SNORM,
758 PIPE_FORMAT_LATC2_UNORM,
759 PIPE_FORMAT_LATC2_SNORM } },
760
761 { { o(EXT_texture_compression_s3tc),
762 o(ANGLE_texture_compression_dxt) },
763 { PIPE_FORMAT_DXT1_RGB,
764 PIPE_FORMAT_DXT1_RGBA,
765 PIPE_FORMAT_DXT3_RGBA,
766 PIPE_FORMAT_DXT5_RGBA } },
767
768 { { o(ARB_texture_compression_bptc) },
769 { PIPE_FORMAT_BPTC_RGBA_UNORM,
770 PIPE_FORMAT_BPTC_SRGBA,
771 PIPE_FORMAT_BPTC_RGB_FLOAT,
772 PIPE_FORMAT_BPTC_RGB_UFLOAT } },
773
774 { { o(KHR_texture_compression_astc_ldr) },
775 { PIPE_FORMAT_ASTC_4x4,
776 PIPE_FORMAT_ASTC_5x4,
777 PIPE_FORMAT_ASTC_5x5,
778 PIPE_FORMAT_ASTC_6x5,
779 PIPE_FORMAT_ASTC_6x6,
780 PIPE_FORMAT_ASTC_8x5,
781 PIPE_FORMAT_ASTC_8x6,
782 PIPE_FORMAT_ASTC_8x8,
783 PIPE_FORMAT_ASTC_10x5,
784 PIPE_FORMAT_ASTC_10x6,
785 PIPE_FORMAT_ASTC_10x8,
786 PIPE_FORMAT_ASTC_10x10,
787 PIPE_FORMAT_ASTC_12x10,
788 PIPE_FORMAT_ASTC_12x12,
789 PIPE_FORMAT_ASTC_4x4_SRGB,
790 PIPE_FORMAT_ASTC_5x4_SRGB,
791 PIPE_FORMAT_ASTC_5x5_SRGB,
792 PIPE_FORMAT_ASTC_6x5_SRGB,
793 PIPE_FORMAT_ASTC_6x6_SRGB,
794 PIPE_FORMAT_ASTC_8x5_SRGB,
795 PIPE_FORMAT_ASTC_8x6_SRGB,
796 PIPE_FORMAT_ASTC_8x8_SRGB,
797 PIPE_FORMAT_ASTC_10x5_SRGB,
798 PIPE_FORMAT_ASTC_10x6_SRGB,
799 PIPE_FORMAT_ASTC_10x8_SRGB,
800 PIPE_FORMAT_ASTC_10x10_SRGB,
801 PIPE_FORMAT_ASTC_12x10_SRGB,
802 PIPE_FORMAT_ASTC_12x12_SRGB } },
803
804 { { o(EXT_texture_shared_exponent) },
805 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
806
807 { { o(EXT_texture_snorm) },
808 { PIPE_FORMAT_R8G8B8A8_SNORM } },
809
810 { { o(EXT_texture_sRGB),
811 o(EXT_texture_sRGB_decode) },
812 { PIPE_FORMAT_A8B8G8R8_SRGB,
813 PIPE_FORMAT_B8G8R8A8_SRGB },
814 GL_TRUE }, /* at least one format must be supported */
815
816 { { o(EXT_texture_type_2_10_10_10_REV) },
817 { PIPE_FORMAT_R10G10B10A2_UNORM,
818 PIPE_FORMAT_B10G10R10A2_UNORM },
819 GL_TRUE }, /* at least one format must be supported */
820
821 { { o(ATI_texture_compression_3dc) },
822 { PIPE_FORMAT_LATC2_UNORM } },
823
824 { { o(MESA_ycbcr_texture) },
825 { PIPE_FORMAT_UYVY,
826 PIPE_FORMAT_YUYV },
827 GL_TRUE }, /* at least one format must be supported */
828
829 { { o(OES_compressed_ETC1_RGB8_texture) },
830 { PIPE_FORMAT_ETC1_RGB8,
831 PIPE_FORMAT_R8G8B8A8_UNORM },
832 GL_TRUE }, /* at least one format must be supported */
833
834 { { o(ARB_stencil_texturing),
835 o(ARB_texture_stencil8) },
836 { PIPE_FORMAT_X24S8_UINT,
837 PIPE_FORMAT_S8X24_UINT },
838 GL_TRUE }, /* at least one format must be supported */
839 };
840
841 /* Required: vertex fetch support. */
842 static const struct st_extension_format_mapping vertex_mapping[] = {
843 { { o(EXT_vertex_array_bgra) },
844 { PIPE_FORMAT_B8G8R8A8_UNORM } },
845 { { o(ARB_vertex_type_2_10_10_10_rev) },
846 { PIPE_FORMAT_R10G10B10A2_UNORM,
847 PIPE_FORMAT_B10G10R10A2_UNORM,
848 PIPE_FORMAT_R10G10B10A2_SNORM,
849 PIPE_FORMAT_B10G10R10A2_SNORM,
850 PIPE_FORMAT_R10G10B10A2_USCALED,
851 PIPE_FORMAT_B10G10R10A2_USCALED,
852 PIPE_FORMAT_R10G10B10A2_SSCALED,
853 PIPE_FORMAT_B10G10R10A2_SSCALED } },
854 { { o(ARB_vertex_type_10f_11f_11f_rev) },
855 { PIPE_FORMAT_R11G11B10_FLOAT } },
856 };
857
858 static const struct st_extension_format_mapping tbo_rgb32[] = {
859 { {o(ARB_texture_buffer_object_rgb32) },
860 { PIPE_FORMAT_R32G32B32_FLOAT,
861 PIPE_FORMAT_R32G32B32_UINT,
862 PIPE_FORMAT_R32G32B32_SINT,
863 } },
864 };
865
866 /*
867 * Extensions that are supported by all Gallium drivers:
868 */
869 extensions->ARB_ES2_compatibility = GL_TRUE;
870 extensions->ARB_depth_texture = GL_TRUE;
871 extensions->ARB_draw_elements_base_vertex = GL_TRUE;
872 extensions->ARB_explicit_attrib_location = GL_TRUE;
873 extensions->ARB_explicit_uniform_location = GL_TRUE;
874 extensions->ARB_fragment_coord_conventions = GL_TRUE;
875 extensions->ARB_fragment_program = GL_TRUE;
876 extensions->ARB_fragment_program_shadow = GL_TRUE;
877 extensions->ARB_fragment_shader = GL_TRUE;
878 extensions->ARB_half_float_vertex = GL_TRUE;
879 extensions->ARB_internalformat_query = GL_TRUE;
880 extensions->ARB_internalformat_query2 = GL_TRUE;
881 extensions->ARB_map_buffer_range = GL_TRUE;
882 extensions->ARB_shadow = GL_TRUE;
883 extensions->ARB_sync = GL_TRUE;
884 extensions->ARB_texture_border_clamp = GL_TRUE;
885 extensions->ARB_texture_cube_map = GL_TRUE;
886 extensions->ARB_texture_env_combine = GL_TRUE;
887 extensions->ARB_texture_env_crossbar = GL_TRUE;
888 extensions->ARB_texture_env_dot3 = GL_TRUE;
889 extensions->ARB_vertex_program = GL_TRUE;
890 extensions->ARB_vertex_shader = GL_TRUE;
891
892 extensions->EXT_blend_color = GL_TRUE;
893 extensions->EXT_blend_func_separate = GL_TRUE;
894 extensions->EXT_blend_minmax = GL_TRUE;
895 extensions->EXT_gpu_program_parameters = GL_TRUE;
896 extensions->EXT_pixel_buffer_object = GL_TRUE;
897 extensions->EXT_point_parameters = GL_TRUE;
898 extensions->EXT_provoking_vertex = GL_TRUE;
899 extensions->EXT_stencil_two_side = GL_TRUE;
900 extensions->EXT_texture_env_dot3 = GL_TRUE;
901
902 extensions->ATI_fragment_shader = GL_TRUE;
903 extensions->ATI_separate_stencil = GL_TRUE;
904 extensions->ATI_texture_env_combine3 = GL_TRUE;
905
906 extensions->MESA_pack_invert = GL_TRUE;
907
908 extensions->NV_fog_distance = GL_TRUE;
909 extensions->NV_texture_env_combine4 = GL_TRUE;
910 extensions->NV_texture_rectangle = GL_TRUE;
911
912 extensions->OES_EGL_image = GL_TRUE;
913 extensions->OES_EGL_image_external = GL_TRUE;
914 extensions->OES_draw_texture = GL_TRUE;
915
916 /* Expose the extensions which directly correspond to gallium caps. */
917 for (i = 0; i < ARRAY_SIZE(cap_mapping); i++) {
918 if (screen->get_param(screen, cap_mapping[i].cap)) {
919 extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
920 }
921 }
922
923 /* Expose the extensions which directly correspond to gallium formats. */
924 init_format_extensions(screen, extensions, rendertarget_mapping,
925 ARRAY_SIZE(rendertarget_mapping), PIPE_TEXTURE_2D,
926 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
927 init_format_extensions(screen, extensions, depthstencil_mapping,
928 ARRAY_SIZE(depthstencil_mapping), PIPE_TEXTURE_2D,
929 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
930 init_format_extensions(screen, extensions, texture_mapping,
931 ARRAY_SIZE(texture_mapping), PIPE_TEXTURE_2D,
932 PIPE_BIND_SAMPLER_VIEW);
933 init_format_extensions(screen, extensions, vertex_mapping,
934 ARRAY_SIZE(vertex_mapping), PIPE_BUFFER,
935 PIPE_BIND_VERTEX_BUFFER);
936
937 /* Figure out GLSL support and set GLSLVersion to it. */
938 consts->GLSLVersion = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
939 consts->GLSLVersionCompat = 140;
940
941 _mesa_override_glsl_version(consts);
942
943 if (options->force_glsl_version > 0 &&
944 options->force_glsl_version <= consts->GLSLVersion) {
945 consts->ForceGLSLVersion = options->force_glsl_version;
946 }
947
948 consts->AllowHigherCompatVersion = options->allow_higher_compat_version;
949
950 consts->ForceGLSLAbsSqrt = options->force_glsl_abs_sqrt;
951
952 consts->AllowGLSLBuiltinVariableRedeclaration = options->allow_glsl_builtin_variable_redeclaration;
953
954 consts->dri_config_options_sha1 = options->config_options_sha1;
955
956 consts->AllowGLSLCrossStageInterpolationMismatch = options->allow_glsl_cross_stage_interpolation_mismatch;
957
958 if (consts->GLSLVersion >= 400)
959 extensions->ARB_gpu_shader5 = GL_TRUE;
960 if (consts->GLSLVersion >= 410)
961 extensions->ARB_shader_precision = GL_TRUE;
962
963 /* This extension needs full OpenGL 3.2, but we don't know if that's
964 * supported at this point. Only check the GLSL version. */
965 if (consts->GLSLVersion >= 150 &&
966 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
967 extensions->AMD_vertex_shader_layer = GL_TRUE;
968 }
969
970 if (consts->GLSLVersion >= 140) {
971 if (screen->get_param(screen, PIPE_CAP_TGSI_ARRAY_COMPONENTS))
972 extensions->ARB_enhanced_layouts = GL_TRUE;
973 }
974
975 if (consts->GLSLVersion >= 130) {
976 consts->NativeIntegers = GL_TRUE;
977 consts->MaxClipPlanes = 8;
978
979 if (screen->get_param(screen, PIPE_CAP_VERTEXID_NOBASE)) {
980 consts->VertexID_is_zero_based = GL_TRUE;
981 }
982
983 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
984 extensions->ARB_conservative_depth = GL_TRUE;
985 extensions->ARB_shading_language_packing = GL_TRUE;
986 extensions->OES_depth_texture_cube_map = GL_TRUE;
987 extensions->ARB_shading_language_420pack = GL_TRUE;
988 extensions->ARB_texture_query_levels = GL_TRUE;
989
990 if (!options->disable_shader_bit_encoding) {
991 extensions->ARB_shader_bit_encoding = GL_TRUE;
992 }
993
994 extensions->EXT_shader_integer_mix = GL_TRUE;
995 extensions->ARB_arrays_of_arrays = GL_TRUE;
996 extensions->MESA_shader_integer_functions = GL_TRUE;
997 } else {
998 /* Optional integer support for GLSL 1.2. */
999 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
1000 PIPE_SHADER_CAP_INTEGERS) &&
1001 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
1002 PIPE_SHADER_CAP_INTEGERS)) {
1003 consts->NativeIntegers = GL_TRUE;
1004
1005 extensions->EXT_shader_integer_mix = GL_TRUE;
1006 }
1007
1008 /* Integer textures make no sense before GLSL 1.30 */
1009 extensions->EXT_texture_integer = GL_FALSE;
1010 }
1011
1012 consts->GLSLZeroInit = options->glsl_zero_init;
1013
1014 consts->UniformBooleanTrue = consts->NativeIntegers ? ~0U : fui(1.0f);
1015
1016 /* Below are the cases which cannot be moved into tables easily. */
1017
1018 if (screen->get_shader_param(screen, PIPE_SHADER_TESS_CTRL,
1019 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
1020 extensions->ARB_tessellation_shader = GL_TRUE;
1021 }
1022
1023 /* What this is really checking for is the ability to support multiple
1024 * invocations of a geometry shader. There is no separate cap for that, so
1025 * we check the GLSLVersion.
1026 */
1027 if (consts->GLSLVersion >= 400 &&
1028 screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
1029 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
1030 extensions->OES_geometry_shader = GL_TRUE;
1031 }
1032
1033 /* Needs PIPE_CAP_SAMPLE_SHADING + all the sample-related bits of
1034 * ARB_gpu_shader5. This enables all the per-sample shading ES extensions.
1035 */
1036 extensions->OES_sample_variables = extensions->ARB_sample_shading &&
1037 extensions->ARB_gpu_shader5;
1038
1039 /* Maximum sample count. */
1040 {
1041 static const enum pipe_format color_formats[] = {
1042 PIPE_FORMAT_R8G8B8A8_UNORM,
1043 PIPE_FORMAT_B8G8R8A8_UNORM,
1044 PIPE_FORMAT_A8R8G8B8_UNORM,
1045 PIPE_FORMAT_A8B8G8R8_UNORM,
1046 };
1047 static const enum pipe_format depth_formats[] = {
1048 PIPE_FORMAT_Z16_UNORM,
1049 PIPE_FORMAT_Z24X8_UNORM,
1050 PIPE_FORMAT_X8Z24_UNORM,
1051 PIPE_FORMAT_Z32_UNORM,
1052 PIPE_FORMAT_Z32_FLOAT
1053 };
1054 static const enum pipe_format int_formats[] = {
1055 PIPE_FORMAT_R8G8B8A8_SINT
1056 };
1057 static const enum pipe_format void_formats[] = {
1058 PIPE_FORMAT_NONE
1059 };
1060
1061 consts->MaxSamples =
1062 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
1063 color_formats, 16,
1064 PIPE_BIND_RENDER_TARGET);
1065
1066 consts->MaxImageSamples =
1067 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
1068 color_formats, 16,
1069 PIPE_BIND_SHADER_IMAGE);
1070
1071 consts->MaxColorTextureSamples =
1072 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
1073 color_formats, consts->MaxSamples,
1074 PIPE_BIND_SAMPLER_VIEW);
1075
1076 consts->MaxDepthTextureSamples =
1077 get_max_samples_for_formats(screen, ARRAY_SIZE(depth_formats),
1078 depth_formats, consts->MaxSamples,
1079 PIPE_BIND_SAMPLER_VIEW);
1080
1081 consts->MaxIntegerSamples =
1082 get_max_samples_for_formats(screen, ARRAY_SIZE(int_formats),
1083 int_formats, consts->MaxSamples,
1084 PIPE_BIND_SAMPLER_VIEW);
1085
1086 /* ARB_framebuffer_no_attachments, assume max no. of samples 32 */
1087 consts->MaxFramebufferSamples =
1088 get_max_samples_for_formats(screen, ARRAY_SIZE(void_formats),
1089 void_formats, 32,
1090 PIPE_BIND_RENDER_TARGET);
1091 }
1092
1093 if (consts->MaxSamples >= 2) {
1094 /* Real MSAA support */
1095 extensions->EXT_framebuffer_multisample = GL_TRUE;
1096 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
1097 }
1098 else if (consts->MaxSamples > 0 &&
1099 screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
1100 /* fake MSAA support */
1101 consts->FakeSWMSAA = GL_TRUE;
1102 extensions->EXT_framebuffer_multisample = GL_TRUE;
1103 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
1104 extensions->ARB_texture_multisample = GL_TRUE;
1105 }
1106
1107 if (consts->MaxDualSourceDrawBuffers > 0 &&
1108 !options->disable_blend_func_extended)
1109 extensions->ARB_blend_func_extended = GL_TRUE;
1110
1111 if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
1112 extensions->ARB_timer_query) {
1113 extensions->EXT_timer_query = GL_TRUE;
1114 }
1115
1116 if (extensions->ARB_transform_feedback2 &&
1117 extensions->ARB_draw_instanced) {
1118 extensions->ARB_transform_feedback_instanced = GL_TRUE;
1119 }
1120 if (options->force_glsl_extensions_warn)
1121 consts->ForceGLSLExtensionsWarn = 1;
1122
1123 if (options->disable_glsl_line_continuations)
1124 consts->DisableGLSLLineContinuations = 1;
1125
1126 if (options->allow_glsl_extension_directive_midshader)
1127 consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
1128
1129 consts->MinMapBufferAlignment =
1130 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
1131
1132 /* The OpenGL Compatibility profile requires arbitrary buffer swizzling. */
1133 if (api == API_OPENGL_COMPAT &&
1134 screen->get_param(screen, PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY))
1135 extensions->ARB_texture_buffer_object = GL_FALSE;
1136
1137 if (extensions->ARB_texture_buffer_object) {
1138 consts->MaxTextureBufferSize =
1139 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
1140 (1u << 31) - 1);
1141 consts->TextureBufferOffsetAlignment =
1142 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
1143
1144 if (consts->TextureBufferOffsetAlignment)
1145 extensions->ARB_texture_buffer_range = GL_TRUE;
1146
1147 init_format_extensions(screen, extensions, tbo_rgb32,
1148 ARRAY_SIZE(tbo_rgb32), PIPE_BUFFER,
1149 PIPE_BIND_SAMPLER_VIEW);
1150 }
1151
1152 extensions->OES_texture_buffer =
1153 extensions->ARB_texture_buffer_object &&
1154 extensions->ARB_texture_buffer_range &&
1155 extensions->ARB_texture_buffer_object_rgb32 &&
1156 extensions->ARB_shader_image_load_store;
1157
1158 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
1159 * If the number of available texture indirections is very limited, then we
1160 * prefer to disable varying packing rather than run the risk of varying
1161 * packing preventing a shader from running.
1162 */
1163 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
1164 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
1165 /* We can't disable varying packing if transform feedback is available,
1166 * because transform feedback code assumes a packed varying layout.
1167 */
1168 if (!extensions->EXT_transform_feedback)
1169 consts->DisableVaryingPacking = GL_TRUE;
1170 }
1171
1172 consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
1173 if (consts->MaxViewports >= 16) {
1174 if (consts->GLSLVersion >= 400) {
1175 consts->ViewportBounds.Min = -32768.0;
1176 consts->ViewportBounds.Max = 32767.0;
1177 } else {
1178 consts->ViewportBounds.Min = -16384.0;
1179 consts->ViewportBounds.Max = 16383.0;
1180 }
1181 extensions->ARB_viewport_array = GL_TRUE;
1182 extensions->ARB_fragment_layer_viewport = GL_TRUE;
1183 if (extensions->AMD_vertex_shader_layer)
1184 extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
1185 }
1186
1187 if (extensions->AMD_vertex_shader_layer &&
1188 extensions->AMD_vertex_shader_viewport_index &&
1189 screen->get_param(screen, PIPE_CAP_TGSI_TES_LAYER_VIEWPORT))
1190 extensions->ARB_shader_viewport_layer_array = GL_TRUE;
1191
1192 /* ARB_framebuffer_no_attachments */
1193 if (screen->get_param(screen, PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT) &&
1194 ((consts->MaxSamples >= 4 && consts->MaxFramebufferLayers >= 2048) ||
1195 (consts->MaxFramebufferSamples >= consts->MaxSamples &&
1196 consts->MaxFramebufferLayers >= consts->MaxArrayTextureLayers)))
1197 extensions->ARB_framebuffer_no_attachments = GL_TRUE;
1198
1199 /* GL_ARB_ES3_compatibility.
1200 *
1201 * Assume that ES3 is supported if GLSL 3.30 is supported.
1202 * (OpenGL 3.3 is a requirement for that extension.)
1203 */
1204 if (consts->GLSLVersion >= 330 &&
1205 /* Requirements for ETC2 emulation. */
1206 screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
1207 PIPE_TEXTURE_2D, 0,
1208 PIPE_BIND_SAMPLER_VIEW) &&
1209 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
1210 PIPE_TEXTURE_2D, 0,
1211 PIPE_BIND_SAMPLER_VIEW) &&
1212 screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
1213 PIPE_TEXTURE_2D, 0,
1214 PIPE_BIND_SAMPLER_VIEW) &&
1215 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
1216 PIPE_TEXTURE_2D, 0,
1217 PIPE_BIND_SAMPLER_VIEW) &&
1218 screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
1219 PIPE_TEXTURE_2D, 0,
1220 PIPE_BIND_SAMPLER_VIEW) &&
1221 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
1222 PIPE_TEXTURE_2D, 0,
1223 PIPE_BIND_SAMPLER_VIEW)) {
1224 extensions->ARB_ES3_compatibility = GL_TRUE;
1225 }
1226
1227 #ifdef HAVE_ST_VDPAU
1228 if (screen->get_video_param &&
1229 screen->get_video_param(screen, PIPE_VIDEO_PROFILE_UNKNOWN,
1230 PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
1231 PIPE_VIDEO_CAP_SUPPORTS_INTERLACED)) {
1232 extensions->NV_vdpau_interop = GL_TRUE;
1233 }
1234 #endif
1235
1236 if (screen->get_param(screen, PIPE_CAP_DOUBLES)) {
1237 extensions->ARB_gpu_shader_fp64 = GL_TRUE;
1238 extensions->ARB_vertex_attrib_64bit = GL_TRUE;
1239 }
1240
1241 if ((ST_DEBUG & DEBUG_GREMEDY) &&
1242 screen->get_param(screen, PIPE_CAP_STRING_MARKER))
1243 extensions->GREMEDY_string_marker = GL_TRUE;
1244
1245 if (screen->get_param(screen, PIPE_CAP_COMPUTE)) {
1246 int compute_supported_irs =
1247 screen->get_shader_param(screen, PIPE_SHADER_COMPUTE,
1248 PIPE_SHADER_CAP_SUPPORTED_IRS);
1249 if (compute_supported_irs & (1 << PIPE_SHADER_IR_TGSI)) {
1250 uint64_t grid_size[3], block_size[3];
1251 uint64_t max_local_size, max_threads_per_block;
1252
1253 screen->get_compute_param(screen, PIPE_SHADER_IR_TGSI,
1254 PIPE_COMPUTE_CAP_MAX_GRID_SIZE, grid_size);
1255 screen->get_compute_param(screen, PIPE_SHADER_IR_TGSI,
1256 PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE, block_size);
1257 screen->get_compute_param(screen, PIPE_SHADER_IR_TGSI,
1258 PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK,
1259 &max_threads_per_block);
1260 screen->get_compute_param(screen, PIPE_SHADER_IR_TGSI,
1261 PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE,
1262 &max_local_size);
1263
1264 consts->MaxComputeWorkGroupInvocations = max_threads_per_block;
1265 consts->MaxComputeSharedMemorySize = max_local_size;
1266
1267 for (i = 0; i < 3; i++) {
1268 consts->MaxComputeWorkGroupCount[i] = grid_size[i];
1269 consts->MaxComputeWorkGroupSize[i] = block_size[i];
1270 }
1271
1272 extensions->ARB_compute_shader =
1273 extensions->ARB_shader_image_load_store &&
1274 extensions->ARB_shader_atomic_counters;
1275
1276 if (extensions->ARB_compute_shader) {
1277 uint64_t max_variable_threads_per_block = 0;
1278
1279 screen->get_compute_param(screen, PIPE_SHADER_IR_TGSI,
1280 PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK,
1281 &max_variable_threads_per_block);
1282
1283 for (i = 0; i < 3; i++) {
1284 /* Clamp the values to avoid having a local work group size
1285 * greater than the maximum number of invocations.
1286 */
1287 consts->MaxComputeVariableGroupSize[i] =
1288 MIN2(consts->MaxComputeWorkGroupSize[i],
1289 max_variable_threads_per_block);
1290 }
1291 consts->MaxComputeVariableGroupInvocations =
1292 max_variable_threads_per_block;
1293
1294 extensions->ARB_compute_variable_group_size =
1295 max_variable_threads_per_block > 0;
1296 }
1297 }
1298 }
1299
1300 if (extensions->EXT_texture_filter_anisotropic &&
1301 screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_ANISOTROPY) >= 16.0)
1302 extensions->ARB_texture_filter_anisotropic = GL_TRUE;
1303
1304 extensions->KHR_robustness = extensions->ARB_robust_buffer_access_behavior;
1305
1306 /* If we support ES 3.1, we support the ES3_1_compatibility ext. However
1307 * there's no clean way of telling whether we would support ES 3.1 from
1308 * here, so copy the condition from compute_version_es2 here. A lot of
1309 * these are redunant, but simpler to just have a (near-)exact copy here.
1310 */
1311 extensions->ARB_ES3_1_compatibility =
1312 extensions->ARB_ES3_compatibility &&
1313 extensions->ARB_arrays_of_arrays &&
1314 extensions->ARB_compute_shader &&
1315 extensions->ARB_draw_indirect &&
1316 extensions->ARB_explicit_uniform_location &&
1317 extensions->ARB_framebuffer_no_attachments &&
1318 extensions->ARB_shader_atomic_counters &&
1319 extensions->ARB_shader_image_load_store &&
1320 extensions->ARB_shader_image_size &&
1321 extensions->ARB_shader_storage_buffer_object &&
1322 extensions->ARB_shading_language_packing &&
1323 extensions->ARB_stencil_texturing &&
1324 extensions->ARB_texture_multisample &&
1325 extensions->ARB_gpu_shader5 &&
1326 extensions->EXT_shader_integer_mix;
1327
1328 extensions->OES_texture_cube_map_array =
1329 extensions->ARB_ES3_1_compatibility &&
1330 extensions->OES_geometry_shader &&
1331 extensions->ARB_texture_cube_map_array;
1332
1333 extensions->OES_viewport_array =
1334 extensions->ARB_ES3_1_compatibility &&
1335 extensions->OES_geometry_shader &&
1336 extensions->ARB_viewport_array;
1337
1338 extensions->OES_primitive_bounding_box = extensions->ARB_ES3_1_compatibility;
1339 consts->NoPrimitiveBoundingBoxOutput = true;
1340
1341 extensions->ANDROID_extension_pack_es31a =
1342 extensions->KHR_texture_compression_astc_ldr &&
1343 extensions->KHR_blend_equation_advanced &&
1344 extensions->OES_sample_variables &&
1345 extensions->ARB_shader_image_load_store &&
1346 extensions->ARB_texture_stencil8 &&
1347 extensions->ARB_texture_multisample &&
1348 extensions->OES_copy_image &&
1349 extensions->ARB_draw_buffers_blend &&
1350 extensions->OES_geometry_shader &&
1351 extensions->ARB_gpu_shader5 &&
1352 extensions->OES_primitive_bounding_box &&
1353 extensions->ARB_tessellation_shader &&
1354 extensions->ARB_texture_border_clamp &&
1355 extensions->OES_texture_buffer &&
1356 extensions->OES_texture_cube_map_array &&
1357 extensions->EXT_texture_sRGB_decode;
1358
1359 /* Same deal as for ARB_ES3_1_compatibility - this has to be computed
1360 * before overall versions are selected. Also it's actually a subset of ES
1361 * 3.2, since it doesn't require ASTC or advanced blending.
1362 */
1363 extensions->ARB_ES3_2_compatibility =
1364 extensions->ARB_ES3_1_compatibility &&
1365 extensions->KHR_robustness &&
1366 extensions->ARB_copy_image &&
1367 extensions->ARB_draw_buffers_blend &&
1368 extensions->ARB_draw_elements_base_vertex &&
1369 extensions->OES_geometry_shader &&
1370 extensions->ARB_gpu_shader5 &&
1371 extensions->ARB_sample_shading &&
1372 extensions->ARB_tessellation_shader &&
1373 extensions->ARB_texture_border_clamp &&
1374 extensions->OES_texture_buffer &&
1375 extensions->ARB_texture_cube_map_array &&
1376 extensions->ARB_texture_stencil8 &&
1377 extensions->ARB_texture_multisample;
1378
1379 if (screen->get_param(screen, PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_TRIANGLES) &&
1380 screen->get_param(screen, PIPE_CAP_CONSERVATIVE_RASTER_POST_SNAP_POINTS_LINES) &&
1381 screen->get_param(screen, PIPE_CAP_CONSERVATIVE_RASTER_POST_DEPTH_COVERAGE)) {
1382 float max_dilate;
1383 bool pre_snap_triangles, pre_snap_points_lines;
1384
1385 max_dilate = screen->get_paramf(screen, PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE);
1386
1387 pre_snap_triangles =
1388 screen->get_param(screen, PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_TRIANGLES);
1389 pre_snap_points_lines =
1390 screen->get_param(screen, PIPE_CAP_CONSERVATIVE_RASTER_PRE_SNAP_POINTS_LINES);
1391
1392 extensions->NV_conservative_raster =
1393 screen->get_param(screen, PIPE_CAP_MAX_CONSERVATIVE_RASTER_SUBPIXEL_PRECISION_BIAS) > 1;
1394
1395 if (extensions->NV_conservative_raster) {
1396 extensions->NV_conservative_raster_dilate = max_dilate >= 0.75;
1397 extensions->NV_conservative_raster_pre_snap_triangles = pre_snap_triangles;
1398 extensions->NV_conservative_raster_pre_snap =
1399 pre_snap_triangles && pre_snap_points_lines;
1400 }
1401 }
1402 }