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st/mesa: query shader CAPs for tessellation
[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_extensions.h"
41 #include "st_format.h"
42
43
44 /*
45 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
46 * avoid evaluating arguments (which are often function calls) more than once.
47 */
48
49 static unsigned _min(unsigned a, unsigned b)
50 {
51 return (a < b) ? a : b;
52 }
53
54 static float _maxf(float a, float b)
55 {
56 return (a > b) ? a : b;
57 }
58
59 static int _clamp(int a, int min, int max)
60 {
61 if (a < min)
62 return min;
63 else if (a > max)
64 return max;
65 else
66 return a;
67 }
68
69
70 /**
71 * Query driver to get implementation limits.
72 * Note that we have to limit/clamp against Mesa's internal limits too.
73 */
74 void st_init_limits(struct pipe_screen *screen,
75 struct gl_constants *c, struct gl_extensions *extensions)
76 {
77 unsigned sh;
78 boolean can_ubo = TRUE;
79
80 c->MaxTextureLevels
81 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
82 MAX_TEXTURE_LEVELS);
83
84 c->Max3DTextureLevels
85 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
86 MAX_3D_TEXTURE_LEVELS);
87
88 c->MaxCubeTextureLevels
89 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
90 MAX_CUBE_TEXTURE_LEVELS);
91
92 c->MaxTextureRectSize
93 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
94
95 c->MaxArrayTextureLayers
96 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
97
98 /* Define max viewport size and max renderbuffer size in terms of
99 * max texture size (note: max tex RECT size = max tex 2D size).
100 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
101 */
102 c->MaxViewportWidth =
103 c->MaxViewportHeight =
104 c->MaxRenderbufferSize = c->MaxTextureRectSize;
105
106 c->MaxDrawBuffers = c->MaxColorAttachments =
107 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
108 1, MAX_DRAW_BUFFERS);
109
110 c->MaxDualSourceDrawBuffers
111 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
112 0, MAX_DRAW_BUFFERS);
113
114 c->MaxLineWidth
115 = _maxf(1.0f, screen->get_paramf(screen,
116 PIPE_CAPF_MAX_LINE_WIDTH));
117 c->MaxLineWidthAA
118 = _maxf(1.0f, screen->get_paramf(screen,
119 PIPE_CAPF_MAX_LINE_WIDTH_AA));
120
121 c->MaxPointSize
122 = _maxf(1.0f, screen->get_paramf(screen,
123 PIPE_CAPF_MAX_POINT_WIDTH));
124 c->MaxPointSizeAA
125 = _maxf(1.0f, screen->get_paramf(screen,
126 PIPE_CAPF_MAX_POINT_WIDTH_AA));
127
128 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
129 * for non-aa sizes, but we can go down to 0.0 for aa points.
130 */
131 c->MinPointSize = 1.0f;
132 c->MinPointSizeAA = 0.0f;
133
134 c->MaxTextureMaxAnisotropy
135 = _maxf(2.0f, screen->get_paramf(screen,
136 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
137
138 c->MaxTextureLodBias
139 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
140
141 c->QuadsFollowProvokingVertexConvention = screen->get_param(
142 screen, 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 default:
177 /* compute shader, etc. */
178 continue;
179 }
180
181 pc->MaxTextureImageUnits =
182 _min(screen->get_shader_param(screen, sh,
183 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
184 MAX_TEXTURE_IMAGE_UNITS);
185
186 pc->MaxInstructions = pc->MaxNativeInstructions =
187 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
188 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
189 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
190 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
191 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
192 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
193 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
194 pc->MaxAttribs = pc->MaxNativeAttribs =
195 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
196 pc->MaxTemps = pc->MaxNativeTemps =
197 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
198 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
199 sh == PIPE_SHADER_VERTEX ? 1 : 0;
200 pc->MaxParameters = pc->MaxNativeParameters =
201 screen->get_shader_param(screen, sh,
202 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
203 pc->MaxInputComponents =
204 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS) * 4;
205 pc->MaxOutputComponents =
206 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_OUTPUTS) * 4;
207
208 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
209
210 pc->MaxUniformBlocks =
211 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
212 if (pc->MaxUniformBlocks)
213 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
214 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
215
216 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
217 c->MaxUniformBlockSize / 4 *
218 pc->MaxUniformBlocks);
219
220 /* Gallium doesn't really care about local vs. env parameters so use the
221 * same limits.
222 */
223 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
224 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
225
226 options->EmitNoNoise = TRUE;
227
228 /* TODO: make these more fine-grained if anyone needs it */
229 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
230 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
231 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
232 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
233
234 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
235
236 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
237 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
238 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
239 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
240 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
241 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
242 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
243 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
244
245 if (pc->MaxNativeInstructions &&
246 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
247 can_ubo = FALSE;
248 }
249
250 if (options->EmitNoLoops)
251 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
252
253 options->LowerClipDistance = true;
254 }
255
256 c->MaxCombinedTextureImageUnits =
257 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
258 c->Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits +
259 c->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits +
260 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
261 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
262 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
263
264 /* This depends on program constants. */
265 c->MaxTextureCoordUnits
266 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
267
268 c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
269
270 c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
271
272 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
273 * of inputs. It's always 2 colors + N generic inputs. */
274 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
275 PIPE_SHADER_CAP_MAX_INPUTS);
276 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
277 c->MaxGeometryOutputVertices = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
278 c->MaxGeometryTotalOutputComponents = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
279 c->MaxTessPatchComponents =
280 MAX2(screen->get_param(screen, PIPE_CAP_MAX_SHADER_PATCH_VARYINGS),
281 MAX_VARYING) * 4;
282
283 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
284 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
285
286 c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
287 c->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
288 c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
289
290 c->MaxTransformFeedbackBuffers =
291 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
292 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
293 c->MaxTransformFeedbackSeparateComponents =
294 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
295 c->MaxTransformFeedbackInterleavedComponents =
296 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
297 c->MaxVertexStreams =
298 MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));
299
300 /* The vertex stream must fit into pipe_stream_output_info::stream */
301 assert(c->MaxVertexStreams <= 4);
302
303 c->MaxVertexAttribStride
304 = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);
305
306 c->StripTextureBorder = GL_TRUE;
307
308 c->GLSLSkipStrictMaxUniformLimitCheck =
309 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
310
311 if (can_ubo) {
312 extensions->ARB_uniform_buffer_object = GL_TRUE;
313 c->UniformBufferOffsetAlignment =
314 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
315 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
316 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
317 c->Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks +
318 c->Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks +
319 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
320 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
321 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
322 }
323 }
324
325
326 /**
327 * Given a member \c x of struct gl_extensions, return offset of
328 * \c x in bytes.
329 */
330 #define o(x) offsetof(struct gl_extensions, x)
331
332
333 struct st_extension_cap_mapping {
334 int extension_offset;
335 int cap;
336 };
337
338 struct st_extension_format_mapping {
339 int extension_offset[2];
340 enum pipe_format format[8];
341
342 /* If TRUE, at least one format must be supported for the extensions to be
343 * advertised. If FALSE, all the formats must be supported. */
344 GLboolean need_at_least_one;
345 };
346
347 /**
348 * Enable extensions if certain pipe formats are supported by the driver.
349 * What extensions will be enabled and what formats must be supported is
350 * described by the array of st_extension_format_mapping.
351 *
352 * target and bind_flags are passed to is_format_supported.
353 */
354 static void
355 init_format_extensions(struct pipe_screen *screen,
356 struct gl_extensions *extensions,
357 const struct st_extension_format_mapping *mapping,
358 unsigned num_mappings,
359 enum pipe_texture_target target,
360 unsigned bind_flags)
361 {
362 GLboolean *extension_table = (GLboolean *) extensions;
363 unsigned i;
364 int j;
365 int num_formats = ARRAY_SIZE(mapping->format);
366 int num_ext = ARRAY_SIZE(mapping->extension_offset);
367
368 for (i = 0; i < num_mappings; i++) {
369 int num_supported = 0;
370
371 /* Examine each format in the list. */
372 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
373 if (screen->is_format_supported(screen, mapping[i].format[j],
374 target, 0, bind_flags)) {
375 num_supported++;
376 }
377 }
378
379 if (!num_supported ||
380 (!mapping[i].need_at_least_one && num_supported != j)) {
381 continue;
382 }
383
384 /* Enable all extensions in the list. */
385 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
386 extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
387 }
388 }
389
390
391 /**
392 * Given a list of formats and bind flags, return the maximum number
393 * of samples supported by any of those formats.
394 */
395 static unsigned
396 get_max_samples_for_formats(struct pipe_screen *screen,
397 unsigned num_formats,
398 enum pipe_format *formats,
399 unsigned max_samples,
400 unsigned bind)
401 {
402 unsigned i, f;
403
404 for (i = max_samples; i > 0; --i) {
405 for (f = 0; f < num_formats; f++) {
406 if (screen->is_format_supported(screen, formats[f],
407 PIPE_TEXTURE_2D, i, bind)) {
408 return i;
409 }
410 }
411 }
412 return 0;
413 }
414
415
416 /**
417 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
418 * which GL extensions are supported.
419 * Quite a few extensions are always supported because they are standard
420 * features or can be built on top of other gallium features.
421 * Some fine tuning may still be needed.
422 */
423 void st_init_extensions(struct pipe_screen *screen,
424 struct gl_constants *consts,
425 struct gl_extensions *extensions,
426 struct st_config_options *options,
427 boolean has_lib_dxtc)
428 {
429 unsigned i;
430 int glsl_feature_level;
431 GLboolean *extension_table = (GLboolean *) extensions;
432
433 static const struct st_extension_cap_mapping cap_mapping[] = {
434 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
435 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
436 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
437 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
438 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
439 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
440 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
441 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
442 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
443 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
444 { o(ARB_pipeline_statistics_query), PIPE_CAP_QUERY_PIPELINE_STATISTICS },
445 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
446 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
447 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
448 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
449 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
450 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
451 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
452 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
453 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
454 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
455
456 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
457 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
458 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
459 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
460 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
461 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
462 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
463 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
464
465 { o(AMD_pinned_memory), PIPE_CAP_RESOURCE_FROM_USER_MEMORY },
466 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
467 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
468 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
469 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
470 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
471 /* GL_NV_point_sprite is not supported by gallium because we don't
472 * support the GL_POINT_SPRITE_R_MODE_NV option. */
473
474 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
475 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
476 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
477 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
478 { o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
479 { o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
480 { o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
481 { o(ARB_conditional_render_inverted), PIPE_CAP_CONDITIONAL_RENDER_INVERTED },
482 { o(ARB_texture_view), PIPE_CAP_SAMPLER_VIEW_TARGET },
483 { o(ARB_clip_control), PIPE_CAP_CLIP_HALFZ },
484 { o(EXT_polygon_offset_clamp), PIPE_CAP_POLYGON_OFFSET_CLAMP },
485 };
486
487 /* Required: render target and sampler support */
488 static const struct st_extension_format_mapping rendertarget_mapping[] = {
489 { { o(ARB_texture_float) },
490 { PIPE_FORMAT_R32G32B32A32_FLOAT,
491 PIPE_FORMAT_R16G16B16A16_FLOAT } },
492
493 { { o(ARB_texture_rgb10_a2ui) },
494 { PIPE_FORMAT_R10G10B10A2_UINT,
495 PIPE_FORMAT_B10G10R10A2_UINT },
496 GL_TRUE }, /* at least one format must be supported */
497
498 { { o(EXT_framebuffer_sRGB) },
499 { PIPE_FORMAT_A8B8G8R8_SRGB,
500 PIPE_FORMAT_B8G8R8A8_SRGB },
501 GL_TRUE }, /* at least one format must be supported */
502
503 { { o(EXT_packed_float) },
504 { PIPE_FORMAT_R11G11B10_FLOAT } },
505
506 { { o(EXT_texture_integer) },
507 { PIPE_FORMAT_R32G32B32A32_UINT,
508 PIPE_FORMAT_R32G32B32A32_SINT } },
509
510 { { o(ARB_texture_rg) },
511 { PIPE_FORMAT_R8_UNORM,
512 PIPE_FORMAT_R8G8_UNORM } },
513 };
514
515 /* Required: depth stencil and sampler support */
516 static const struct st_extension_format_mapping depthstencil_mapping[] = {
517 { { o(ARB_depth_buffer_float) },
518 { PIPE_FORMAT_Z32_FLOAT,
519 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
520 };
521
522 /* Required: sampler support */
523 static const struct st_extension_format_mapping texture_mapping[] = {
524 { { o(ARB_texture_compression_rgtc) },
525 { PIPE_FORMAT_RGTC1_UNORM,
526 PIPE_FORMAT_RGTC1_SNORM,
527 PIPE_FORMAT_RGTC2_UNORM,
528 PIPE_FORMAT_RGTC2_SNORM } },
529
530 { { o(EXT_texture_compression_latc) },
531 { PIPE_FORMAT_LATC1_UNORM,
532 PIPE_FORMAT_LATC1_SNORM,
533 PIPE_FORMAT_LATC2_UNORM,
534 PIPE_FORMAT_LATC2_SNORM } },
535
536 { { o(EXT_texture_compression_s3tc),
537 o(ANGLE_texture_compression_dxt) },
538 { PIPE_FORMAT_DXT1_RGB,
539 PIPE_FORMAT_DXT1_RGBA,
540 PIPE_FORMAT_DXT3_RGBA,
541 PIPE_FORMAT_DXT5_RGBA } },
542
543 { { o(ARB_texture_compression_bptc) },
544 { PIPE_FORMAT_BPTC_RGBA_UNORM,
545 PIPE_FORMAT_BPTC_SRGBA,
546 PIPE_FORMAT_BPTC_RGB_FLOAT,
547 PIPE_FORMAT_BPTC_RGB_UFLOAT } },
548
549 { { o(EXT_texture_shared_exponent) },
550 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
551
552 { { o(EXT_texture_snorm) },
553 { PIPE_FORMAT_R8G8B8A8_SNORM } },
554
555 { { o(EXT_texture_sRGB),
556 o(EXT_texture_sRGB_decode) },
557 { PIPE_FORMAT_A8B8G8R8_SRGB,
558 PIPE_FORMAT_B8G8R8A8_SRGB },
559 GL_TRUE }, /* at least one format must be supported */
560
561 { { o(ATI_texture_compression_3dc) },
562 { PIPE_FORMAT_LATC2_UNORM } },
563
564 { { o(MESA_ycbcr_texture) },
565 { PIPE_FORMAT_UYVY,
566 PIPE_FORMAT_YUYV },
567 GL_TRUE }, /* at least one format must be supported */
568
569 { { o(OES_compressed_ETC1_RGB8_texture) },
570 { PIPE_FORMAT_ETC1_RGB8,
571 PIPE_FORMAT_R8G8B8A8_UNORM },
572 GL_TRUE }, /* at least one format must be supported */
573
574 { { o(ARB_stencil_texturing) },
575 { PIPE_FORMAT_X24S8_UINT,
576 PIPE_FORMAT_S8X24_UINT },
577 GL_TRUE }, /* at least one format must be supported */
578 };
579
580 /* Required: vertex fetch support. */
581 static const struct st_extension_format_mapping vertex_mapping[] = {
582 { { o(ARB_vertex_type_2_10_10_10_rev) },
583 { PIPE_FORMAT_R10G10B10A2_UNORM,
584 PIPE_FORMAT_B10G10R10A2_UNORM,
585 PIPE_FORMAT_R10G10B10A2_SNORM,
586 PIPE_FORMAT_B10G10R10A2_SNORM,
587 PIPE_FORMAT_R10G10B10A2_USCALED,
588 PIPE_FORMAT_B10G10R10A2_USCALED,
589 PIPE_FORMAT_R10G10B10A2_SSCALED,
590 PIPE_FORMAT_B10G10R10A2_SSCALED } },
591 { { o(ARB_vertex_type_10f_11f_11f_rev) },
592 { PIPE_FORMAT_R11G11B10_FLOAT } },
593 };
594
595 static const struct st_extension_format_mapping tbo_rgb32[] = {
596 { {o(ARB_texture_buffer_object_rgb32) },
597 { PIPE_FORMAT_R32G32B32_FLOAT,
598 PIPE_FORMAT_R32G32B32_UINT,
599 PIPE_FORMAT_R32G32B32_SINT,
600 } },
601 };
602
603 /*
604 * Extensions that are supported by all Gallium drivers:
605 */
606 extensions->ARB_ES2_compatibility = GL_TRUE;
607 extensions->ARB_draw_elements_base_vertex = GL_TRUE;
608 extensions->ARB_explicit_attrib_location = GL_TRUE;
609 extensions->ARB_explicit_uniform_location = GL_TRUE;
610 extensions->ARB_fragment_coord_conventions = GL_TRUE;
611 extensions->ARB_fragment_program = GL_TRUE;
612 extensions->ARB_fragment_shader = GL_TRUE;
613 extensions->ARB_half_float_vertex = GL_TRUE;
614 extensions->ARB_internalformat_query = GL_TRUE;
615 extensions->ARB_map_buffer_range = GL_TRUE;
616 extensions->ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
617 extensions->ARB_texture_cube_map = GL_TRUE;
618 extensions->ARB_texture_env_combine = GL_TRUE;
619 extensions->ARB_texture_env_crossbar = GL_TRUE;
620 extensions->ARB_texture_env_dot3 = GL_TRUE;
621 extensions->ARB_vertex_program = GL_TRUE;
622 extensions->ARB_vertex_shader = GL_TRUE;
623
624 extensions->EXT_blend_color = GL_TRUE;
625 extensions->EXT_blend_func_separate = GL_TRUE;
626 extensions->EXT_blend_minmax = GL_TRUE;
627 extensions->EXT_gpu_program_parameters = GL_TRUE;
628 extensions->EXT_pixel_buffer_object = GL_TRUE;
629 extensions->EXT_point_parameters = GL_TRUE;
630 extensions->EXT_provoking_vertex = GL_TRUE;
631
632 extensions->EXT_texture_env_dot3 = GL_TRUE;
633 extensions->EXT_vertex_array_bgra = GL_TRUE;
634
635 extensions->ATI_texture_env_combine3 = GL_TRUE;
636
637 extensions->MESA_pack_invert = GL_TRUE;
638
639 extensions->NV_fog_distance = GL_TRUE;
640 extensions->NV_texture_env_combine4 = GL_TRUE;
641 extensions->NV_texture_rectangle = GL_TRUE;
642
643 extensions->OES_EGL_image = GL_TRUE;
644 extensions->OES_EGL_image_external = GL_TRUE;
645 extensions->OES_draw_texture = GL_TRUE;
646
647 /* Expose the extensions which directly correspond to gallium caps. */
648 for (i = 0; i < ARRAY_SIZE(cap_mapping); i++) {
649 if (screen->get_param(screen, cap_mapping[i].cap)) {
650 extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
651 }
652 }
653
654 /* Expose the extensions which directly correspond to gallium formats. */
655 init_format_extensions(screen, extensions, rendertarget_mapping,
656 ARRAY_SIZE(rendertarget_mapping), PIPE_TEXTURE_2D,
657 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
658 init_format_extensions(screen, extensions, depthstencil_mapping,
659 ARRAY_SIZE(depthstencil_mapping), PIPE_TEXTURE_2D,
660 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
661 init_format_extensions(screen, extensions, texture_mapping,
662 ARRAY_SIZE(texture_mapping), PIPE_TEXTURE_2D,
663 PIPE_BIND_SAMPLER_VIEW);
664 init_format_extensions(screen, extensions, vertex_mapping,
665 ARRAY_SIZE(vertex_mapping), PIPE_BUFFER,
666 PIPE_BIND_VERTEX_BUFFER);
667
668 if (extensions->ARB_stencil_texturing)
669 extensions->ARB_texture_stencil8 = GL_TRUE;
670
671 /* Figure out GLSL support. */
672 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
673
674 consts->GLSLVersion = glsl_feature_level;
675 if (glsl_feature_level >= 410)
676 consts->GLSLVersion = 410;
677
678 _mesa_override_glsl_version(consts);
679
680 if (options->force_glsl_version > 0 &&
681 options->force_glsl_version <= consts->GLSLVersion) {
682 consts->ForceGLSLVersion = options->force_glsl_version;
683 }
684
685 if (glsl_feature_level >= 400)
686 extensions->ARB_gpu_shader5 = GL_TRUE;
687 if (glsl_feature_level >= 410)
688 extensions->ARB_shader_precision = GL_TRUE;
689
690 /* This extension needs full OpenGL 3.2, but we don't know if that's
691 * supported at this point. Only check the GLSL version. */
692 if (consts->GLSLVersion >= 150 &&
693 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
694 extensions->AMD_vertex_shader_layer = GL_TRUE;
695 }
696
697 if (consts->GLSLVersion >= 130) {
698 consts->NativeIntegers = GL_TRUE;
699 consts->MaxClipPlanes = 8;
700
701 if (screen->get_param(screen, PIPE_CAP_VERTEXID_NOBASE)) {
702 consts->VertexID_is_zero_based = GL_TRUE;
703 }
704
705 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
706 extensions->ARB_conservative_depth = GL_TRUE;
707 extensions->ARB_shading_language_packing = GL_TRUE;
708 extensions->OES_depth_texture_cube_map = GL_TRUE;
709 extensions->ARB_shading_language_420pack = GL_TRUE;
710 extensions->ARB_texture_query_levels = GL_TRUE;
711
712 if (!options->disable_shader_bit_encoding) {
713 extensions->ARB_shader_bit_encoding = GL_TRUE;
714 }
715
716 extensions->EXT_shader_integer_mix = GL_TRUE;
717 } else {
718 /* Optional integer support for GLSL 1.2. */
719 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
720 PIPE_SHADER_CAP_INTEGERS) &&
721 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
722 PIPE_SHADER_CAP_INTEGERS)) {
723 consts->NativeIntegers = GL_TRUE;
724
725 extensions->EXT_shader_integer_mix = GL_TRUE;
726 }
727
728 /* Integer textures make no sense before GLSL 1.30 */
729 extensions->EXT_texture_integer = GL_FALSE;
730 }
731
732 consts->UniformBooleanTrue = consts->NativeIntegers ? ~0U : fui(1.0f);
733
734 /* Below are the cases which cannot be moved into tables easily. */
735
736 if (!has_lib_dxtc && !options->force_s3tc_enable) {
737 extensions->EXT_texture_compression_s3tc = GL_FALSE;
738 extensions->ANGLE_texture_compression_dxt = GL_FALSE;
739 }
740
741 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
742 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
743 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
744 extensions->ARB_geometry_shader4 = GL_TRUE;
745 #endif
746 }
747
748 if (screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
749 extensions->NV_primitive_restart = GL_TRUE;
750 }
751
752 /* ARB_color_buffer_float. */
753 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
754 extensions->ARB_color_buffer_float = GL_TRUE;
755 }
756
757 if (screen->fence_finish) {
758 extensions->ARB_sync = GL_TRUE;
759 }
760
761 /* Maximum sample count. */
762 {
763 enum pipe_format color_formats[] = {
764 PIPE_FORMAT_R8G8B8A8_UNORM,
765 PIPE_FORMAT_B8G8R8A8_UNORM,
766 PIPE_FORMAT_A8R8G8B8_UNORM,
767 PIPE_FORMAT_A8B8G8R8_UNORM,
768 };
769 enum pipe_format depth_formats[] = {
770 PIPE_FORMAT_Z16_UNORM,
771 PIPE_FORMAT_Z24X8_UNORM,
772 PIPE_FORMAT_X8Z24_UNORM,
773 PIPE_FORMAT_Z32_UNORM,
774 PIPE_FORMAT_Z32_FLOAT
775 };
776 enum pipe_format int_formats[] = {
777 PIPE_FORMAT_R8G8B8A8_SINT
778 };
779
780 consts->MaxSamples =
781 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
782 color_formats, 16,
783 PIPE_BIND_RENDER_TARGET);
784
785 consts->MaxColorTextureSamples =
786 get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
787 color_formats, consts->MaxSamples,
788 PIPE_BIND_SAMPLER_VIEW);
789
790 consts->MaxDepthTextureSamples =
791 get_max_samples_for_formats(screen, ARRAY_SIZE(depth_formats),
792 depth_formats, consts->MaxSamples,
793 PIPE_BIND_SAMPLER_VIEW);
794
795 consts->MaxIntegerSamples =
796 get_max_samples_for_formats(screen, ARRAY_SIZE(int_formats),
797 int_formats, consts->MaxSamples,
798 PIPE_BIND_SAMPLER_VIEW);
799 }
800 if (consts->MaxSamples == 1) {
801 /* one sample doesn't really make sense */
802 consts->MaxSamples = 0;
803 }
804 else if (consts->MaxSamples >= 2) {
805 extensions->EXT_framebuffer_multisample = GL_TRUE;
806 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
807 }
808
809 if (consts->MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
810 consts->FakeSWMSAA = GL_TRUE;
811 extensions->EXT_framebuffer_multisample = GL_TRUE;
812 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
813 extensions->ARB_texture_multisample = GL_TRUE;
814 }
815
816 if (consts->MaxDualSourceDrawBuffers > 0 &&
817 !options->disable_blend_func_extended)
818 extensions->ARB_blend_func_extended = GL_TRUE;
819
820 if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
821 extensions->ARB_timer_query) {
822 extensions->EXT_timer_query = GL_TRUE;
823 }
824
825 if (extensions->ARB_transform_feedback2 &&
826 extensions->ARB_draw_instanced) {
827 extensions->ARB_transform_feedback_instanced = GL_TRUE;
828 }
829 if (options->force_glsl_extensions_warn)
830 consts->ForceGLSLExtensionsWarn = 1;
831
832 if (options->disable_glsl_line_continuations)
833 consts->DisableGLSLLineContinuations = 1;
834
835 if (options->allow_glsl_extension_directive_midshader)
836 consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
837
838 consts->MinMapBufferAlignment =
839 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
840
841 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
842 extensions->ARB_texture_buffer_object = GL_TRUE;
843
844 consts->MaxTextureBufferSize =
845 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
846 (1u << 31) - 1);
847 consts->TextureBufferOffsetAlignment =
848 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
849
850 if (consts->TextureBufferOffsetAlignment)
851 extensions->ARB_texture_buffer_range = GL_TRUE;
852
853 init_format_extensions(screen, extensions, tbo_rgb32,
854 ARRAY_SIZE(tbo_rgb32), PIPE_BUFFER,
855 PIPE_BIND_SAMPLER_VIEW);
856 }
857
858 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
859 extensions->ARB_framebuffer_object = GL_TRUE;
860 }
861
862 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
863 * If the number of available texture indirections is very limited, then we
864 * prefer to disable varying packing rather than run the risk of varying
865 * packing preventing a shader from running.
866 */
867 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
868 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
869 /* We can't disable varying packing if transform feedback is available,
870 * because transform feedback code assumes a packed varying layout.
871 */
872 if (!extensions->EXT_transform_feedback)
873 consts->DisableVaryingPacking = GL_TRUE;
874 }
875
876 consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
877 if (consts->MaxViewports >= 16) {
878 consts->ViewportBounds.Min = -16384.0;
879 consts->ViewportBounds.Max = 16384.0;
880 extensions->ARB_viewport_array = GL_TRUE;
881 extensions->ARB_fragment_layer_viewport = GL_TRUE;
882 if (extensions->AMD_vertex_shader_layer)
883 extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
884 }
885
886 if (consts->MaxProgramTextureGatherComponents > 0)
887 extensions->ARB_texture_gather = GL_TRUE;
888
889 /* GL_ARB_ES3_compatibility.
890 *
891 * Assume that ES3 is supported if GLSL 3.30 is supported.
892 * (OpenGL 3.3 is a requirement for that extension.)
893 */
894 if (consts->GLSLVersion >= 330 &&
895 /* Requirements for ETC2 emulation. */
896 screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
897 PIPE_TEXTURE_2D, 0,
898 PIPE_BIND_SAMPLER_VIEW) &&
899 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
900 PIPE_TEXTURE_2D, 0,
901 PIPE_BIND_SAMPLER_VIEW) &&
902 screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
903 PIPE_TEXTURE_2D, 0,
904 PIPE_BIND_SAMPLER_VIEW) &&
905 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
906 PIPE_TEXTURE_2D, 0,
907 PIPE_BIND_SAMPLER_VIEW) &&
908 screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
909 PIPE_TEXTURE_2D, 0,
910 PIPE_BIND_SAMPLER_VIEW) &&
911 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
912 PIPE_TEXTURE_2D, 0,
913 PIPE_BIND_SAMPLER_VIEW)) {
914 extensions->ARB_ES3_compatibility = GL_TRUE;
915 }
916
917 if (screen->get_video_param &&
918 screen->get_video_param(screen, PIPE_VIDEO_PROFILE_UNKNOWN,
919 PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
920 PIPE_VIDEO_CAP_SUPPORTS_INTERLACED)) {
921 extensions->NV_vdpau_interop = GL_TRUE;
922 }
923
924 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
925 PIPE_SHADER_CAP_DOUBLES) &&
926 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
927 PIPE_SHADER_CAP_DOUBLES)) {
928 extensions->ARB_gpu_shader_fp64 = GL_TRUE;
929 extensions->ARB_vertex_attrib_64bit = GL_TRUE;
930 }
931 }