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mesa/st: Support ARB_conditional_render_inverted modes
[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
38 #include "st_context.h"
39 #include "st_extensions.h"
40 #include "st_format.h"
41
42
43 /*
44 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
45 * avoid evaluating arguments (which are often function calls) more than once.
46 */
47
48 static unsigned _min(unsigned a, unsigned b)
49 {
50 return (a < b) ? a : b;
51 }
52
53 static float _maxf(float a, float b)
54 {
55 return (a > b) ? a : b;
56 }
57
58 static int _clamp(int a, int min, int max)
59 {
60 if (a < min)
61 return min;
62 else if (a > max)
63 return max;
64 else
65 return a;
66 }
67
68
69 /**
70 * Query driver to get implementation limits.
71 * Note that we have to limit/clamp against Mesa's internal limits too.
72 */
73 void st_init_limits(struct pipe_screen *screen,
74 struct gl_constants *c, struct gl_extensions *extensions)
75 {
76 unsigned sh;
77 boolean can_ubo = TRUE;
78
79 c->MaxTextureLevels
80 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
81 MAX_TEXTURE_LEVELS);
82
83 c->Max3DTextureLevels
84 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
85 MAX_3D_TEXTURE_LEVELS);
86
87 c->MaxCubeTextureLevels
88 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
89 MAX_CUBE_TEXTURE_LEVELS);
90
91 c->MaxTextureRectSize
92 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
93
94 c->MaxArrayTextureLayers
95 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
96
97 /* Define max viewport size and max renderbuffer size in terms of
98 * max texture size (note: max tex RECT size = max tex 2D size).
99 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
100 */
101 c->MaxViewportWidth =
102 c->MaxViewportHeight =
103 c->MaxRenderbufferSize = c->MaxTextureRectSize;
104
105 c->MaxDrawBuffers = c->MaxColorAttachments =
106 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
107 1, MAX_DRAW_BUFFERS);
108
109 c->MaxDualSourceDrawBuffers
110 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
111 0, MAX_DRAW_BUFFERS);
112
113 c->MaxLineWidth
114 = _maxf(1.0f, screen->get_paramf(screen,
115 PIPE_CAPF_MAX_LINE_WIDTH));
116 c->MaxLineWidthAA
117 = _maxf(1.0f, screen->get_paramf(screen,
118 PIPE_CAPF_MAX_LINE_WIDTH_AA));
119
120 c->MaxPointSize
121 = _maxf(1.0f, screen->get_paramf(screen,
122 PIPE_CAPF_MAX_POINT_WIDTH));
123 c->MaxPointSizeAA
124 = _maxf(1.0f, screen->get_paramf(screen,
125 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, screen->get_paramf(screen,
135 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
136
137 c->MaxTextureLodBias
138 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
139
140 c->QuadsFollowProvokingVertexConvention = screen->get_param(
141 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
142
143 c->MaxUniformBlockSize =
144 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
145 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE);
146 if (c->MaxUniformBlockSize < 16384) {
147 can_ubo = FALSE;
148 }
149
150 for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
151 struct gl_shader_compiler_options *options;
152 struct gl_program_constants *pc;
153
154 switch (sh) {
155 case PIPE_SHADER_FRAGMENT:
156 pc = &c->Program[MESA_SHADER_FRAGMENT];
157 options = &c->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
158 break;
159 case PIPE_SHADER_VERTEX:
160 pc = &c->Program[MESA_SHADER_VERTEX];
161 options = &c->ShaderCompilerOptions[MESA_SHADER_VERTEX];
162 break;
163 case PIPE_SHADER_GEOMETRY:
164 pc = &c->Program[MESA_SHADER_GEOMETRY];
165 options = &c->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
166 break;
167 default:
168 /* compute shader, etc. */
169 continue;
170 }
171
172 pc->MaxTextureImageUnits =
173 _min(screen->get_shader_param(screen, sh,
174 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
175 MAX_TEXTURE_IMAGE_UNITS);
176
177 pc->MaxInstructions = pc->MaxNativeInstructions =
178 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
179 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
180 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
181 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
182 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
183 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
184 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
185 pc->MaxAttribs = pc->MaxNativeAttribs =
186 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
187 pc->MaxTemps = pc->MaxNativeTemps =
188 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
189 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
190 sh == PIPE_SHADER_VERTEX ? 1 : 0;
191 pc->MaxParameters = pc->MaxNativeParameters =
192 screen->get_shader_param(screen, sh,
193 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
194
195 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
196
197 pc->MaxUniformBlocks =
198 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
199 if (pc->MaxUniformBlocks)
200 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
201 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
202
203 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
204 c->MaxUniformBlockSize / 4 *
205 pc->MaxUniformBlocks);
206
207 /* Gallium doesn't really care about local vs. env parameters so use the
208 * same limits.
209 */
210 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
211 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
212
213 options->EmitNoNoise = TRUE;
214
215 /* TODO: make these more fine-grained if anyone needs it */
216 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
217 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
218 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
219 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
220
221 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
222
223 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
224 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
225 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
226 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
227 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
228 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
229 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
230 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
231
232 if (pc->MaxNativeInstructions &&
233 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
234 can_ubo = FALSE;
235 }
236
237 if (options->EmitNoLoops)
238 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
239 else
240 options->MaxUnrollIterations = 255; /* SM3 limit */
241 options->LowerClipDistance = true;
242 }
243
244 c->MaxCombinedTextureImageUnits =
245 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
246 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
247 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
248 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
249
250 /* This depends on program constants. */
251 c->MaxTextureCoordUnits
252 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
253
254 c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
255
256 c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
257
258 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
259 * of inputs. It's always 2 colors + N generic inputs. */
260 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
261 PIPE_SHADER_CAP_MAX_INPUTS);
262 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
263 c->Program[MESA_SHADER_FRAGMENT].MaxInputComponents = c->MaxVarying * 4;
264 c->Program[MESA_SHADER_VERTEX].MaxOutputComponents = c->MaxVarying * 4;
265 c->Program[MESA_SHADER_GEOMETRY].MaxInputComponents = c->MaxVarying * 4;
266 c->Program[MESA_SHADER_GEOMETRY].MaxOutputComponents = c->MaxVarying * 4;
267 c->MaxGeometryOutputVertices = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
268 c->MaxGeometryTotalOutputComponents = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
269
270 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
271 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
272
273 c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
274 c->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
275 c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
276
277 c->UniformBooleanTrue = ~0;
278
279 c->MaxTransformFeedbackBuffers =
280 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
281 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
282 c->MaxTransformFeedbackSeparateComponents =
283 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
284 c->MaxTransformFeedbackInterleavedComponents =
285 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
286 c->MaxVertexStreams =
287 MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));
288
289 /* The vertex stream must fit into pipe_stream_output_info::stream */
290 assert(c->MaxVertexStreams <= 4);
291
292 c->StripTextureBorder = GL_TRUE;
293
294 c->GLSLSkipStrictMaxUniformLimitCheck =
295 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
296
297 if (can_ubo) {
298 extensions->ARB_uniform_buffer_object = GL_TRUE;
299 c->UniformBufferOffsetAlignment =
300 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
301 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
302 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
303 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
304 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
305 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
306 }
307 }
308
309
310 /**
311 * Given a member \c x of struct gl_extensions, return offset of
312 * \c x in bytes.
313 */
314 #define o(x) offsetof(struct gl_extensions, x)
315
316
317 struct st_extension_cap_mapping {
318 int extension_offset;
319 int cap;
320 };
321
322 struct st_extension_format_mapping {
323 int extension_offset[2];
324 enum pipe_format format[8];
325
326 /* If TRUE, at least one format must be supported for the extensions to be
327 * advertised. If FALSE, all the formats must be supported. */
328 GLboolean need_at_least_one;
329 };
330
331 /**
332 * Enable extensions if certain pipe formats are supported by the driver.
333 * What extensions will be enabled and what formats must be supported is
334 * described by the array of st_extension_format_mapping.
335 *
336 * target and bind_flags are passed to is_format_supported.
337 */
338 static void
339 init_format_extensions(struct pipe_screen *screen,
340 struct gl_extensions *extensions,
341 const struct st_extension_format_mapping *mapping,
342 unsigned num_mappings,
343 enum pipe_texture_target target,
344 unsigned bind_flags)
345 {
346 GLboolean *extension_table = (GLboolean *) extensions;
347 unsigned i;
348 int j;
349 int num_formats = Elements(mapping->format);
350 int num_ext = Elements(mapping->extension_offset);
351
352 for (i = 0; i < num_mappings; i++) {
353 int num_supported = 0;
354
355 /* Examine each format in the list. */
356 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
357 if (screen->is_format_supported(screen, mapping[i].format[j],
358 target, 0, bind_flags)) {
359 num_supported++;
360 }
361 }
362
363 if (!num_supported ||
364 (!mapping[i].need_at_least_one && num_supported != j)) {
365 continue;
366 }
367
368 /* Enable all extensions in the list. */
369 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
370 extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
371 }
372 }
373
374
375 /**
376 * Given a list of formats and bind flags, return the maximum number
377 * of samples supported by any of those formats.
378 */
379 static unsigned
380 get_max_samples_for_formats(struct pipe_screen *screen,
381 unsigned num_formats,
382 enum pipe_format *formats,
383 unsigned max_samples,
384 unsigned bind)
385 {
386 unsigned i, f;
387
388 for (i = max_samples; i > 0; --i) {
389 for (f = 0; f < num_formats; f++) {
390 if (screen->is_format_supported(screen, formats[f],
391 PIPE_TEXTURE_2D, i, bind)) {
392 return i;
393 }
394 }
395 }
396 return 0;
397 }
398
399
400 /**
401 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
402 * which GL extensions are supported.
403 * Quite a few extensions are always supported because they are standard
404 * features or can be built on top of other gallium features.
405 * Some fine tuning may still be needed.
406 */
407 void st_init_extensions(struct pipe_screen *screen,
408 gl_api api,
409 struct gl_constants *consts,
410 struct gl_extensions *extensions,
411 struct st_config_options *options,
412 boolean has_lib_dxtc)
413 {
414 int i, glsl_feature_level;
415 GLboolean *extension_table = (GLboolean *) extensions;
416
417 static const struct st_extension_cap_mapping cap_mapping[] = {
418 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
419 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
420 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
421 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
422 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
423 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
424 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
425 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
426 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
427 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
428 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
429 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
430 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
431 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
432 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
433 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
434 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
435 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
436 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
437 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
438
439 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
440 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
441 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
442 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
443 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
444 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
445 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
446 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
447
448 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
449 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
450 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
451 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
452 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
453 /* GL_NV_point_sprite is not supported by gallium because we don't
454 * support the GL_POINT_SPRITE_R_MODE_NV option. */
455
456 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
457 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
458 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
459 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
460 { o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
461 { o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
462 { o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
463 { o(ARB_conditional_render_inverted), PIPE_CAP_CONDITIONAL_RENDER_INVERTED },
464 };
465
466 /* Required: render target and sampler support */
467 static const struct st_extension_format_mapping rendertarget_mapping[] = {
468 { { o(ARB_texture_float) },
469 { PIPE_FORMAT_R32G32B32A32_FLOAT,
470 PIPE_FORMAT_R16G16B16A16_FLOAT } },
471
472 { { o(ARB_texture_rgb10_a2ui) },
473 { PIPE_FORMAT_R10G10B10A2_UINT,
474 PIPE_FORMAT_B10G10R10A2_UINT },
475 GL_TRUE }, /* at least one format must be supported */
476
477 { { o(EXT_framebuffer_sRGB) },
478 { PIPE_FORMAT_A8B8G8R8_SRGB,
479 PIPE_FORMAT_B8G8R8A8_SRGB },
480 GL_TRUE }, /* at least one format must be supported */
481
482 { { o(EXT_packed_float) },
483 { PIPE_FORMAT_R11G11B10_FLOAT } },
484
485 { { o(EXT_texture_integer) },
486 { PIPE_FORMAT_R32G32B32A32_UINT,
487 PIPE_FORMAT_R32G32B32A32_SINT } },
488
489 { { o(ARB_texture_rg) },
490 { PIPE_FORMAT_R8_UNORM,
491 PIPE_FORMAT_R8G8_UNORM } },
492 };
493
494 /* Required: depth stencil and sampler support */
495 static const struct st_extension_format_mapping depthstencil_mapping[] = {
496 { { o(ARB_depth_buffer_float) },
497 { PIPE_FORMAT_Z32_FLOAT,
498 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
499 };
500
501 /* Required: sampler support */
502 static const struct st_extension_format_mapping texture_mapping[] = {
503 { { o(ARB_texture_compression_rgtc) },
504 { PIPE_FORMAT_RGTC1_UNORM,
505 PIPE_FORMAT_RGTC1_SNORM,
506 PIPE_FORMAT_RGTC2_UNORM,
507 PIPE_FORMAT_RGTC2_SNORM } },
508
509 { { o(EXT_texture_compression_latc) },
510 { PIPE_FORMAT_LATC1_UNORM,
511 PIPE_FORMAT_LATC1_SNORM,
512 PIPE_FORMAT_LATC2_UNORM,
513 PIPE_FORMAT_LATC2_SNORM } },
514
515 { { o(EXT_texture_compression_s3tc),
516 o(ANGLE_texture_compression_dxt) },
517 { PIPE_FORMAT_DXT1_RGB,
518 PIPE_FORMAT_DXT1_RGBA,
519 PIPE_FORMAT_DXT3_RGBA,
520 PIPE_FORMAT_DXT5_RGBA } },
521
522 { { o(ARB_texture_compression_bptc) },
523 { PIPE_FORMAT_BPTC_RGBA_UNORM,
524 PIPE_FORMAT_BPTC_SRGBA,
525 PIPE_FORMAT_BPTC_RGB_FLOAT,
526 PIPE_FORMAT_BPTC_RGB_UFLOAT } },
527
528 { { o(EXT_texture_shared_exponent) },
529 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
530
531 { { o(EXT_texture_snorm) },
532 { PIPE_FORMAT_R8G8B8A8_SNORM } },
533
534 { { o(EXT_texture_sRGB),
535 o(EXT_texture_sRGB_decode) },
536 { PIPE_FORMAT_A8B8G8R8_SRGB,
537 PIPE_FORMAT_B8G8R8A8_SRGB },
538 GL_TRUE }, /* at least one format must be supported */
539
540 { { o(ATI_texture_compression_3dc) },
541 { PIPE_FORMAT_LATC2_UNORM } },
542
543 { { o(MESA_ycbcr_texture) },
544 { PIPE_FORMAT_UYVY,
545 PIPE_FORMAT_YUYV },
546 GL_TRUE }, /* at least one format must be supported */
547
548 { { o(OES_compressed_ETC1_RGB8_texture) },
549 { PIPE_FORMAT_ETC1_RGB8,
550 PIPE_FORMAT_R8G8B8A8_UNORM },
551 GL_TRUE }, /* at least one format must be supported */
552
553 { { o(ARB_stencil_texturing) },
554 { PIPE_FORMAT_X24S8_UINT,
555 PIPE_FORMAT_S8X24_UINT },
556 GL_TRUE }, /* at least one format must be supported */
557 };
558
559 /* Required: vertex fetch support. */
560 static const struct st_extension_format_mapping vertex_mapping[] = {
561 { { o(ARB_vertex_type_2_10_10_10_rev) },
562 { PIPE_FORMAT_R10G10B10A2_UNORM,
563 PIPE_FORMAT_B10G10R10A2_UNORM,
564 PIPE_FORMAT_R10G10B10A2_SNORM,
565 PIPE_FORMAT_B10G10R10A2_SNORM,
566 PIPE_FORMAT_R10G10B10A2_USCALED,
567 PIPE_FORMAT_B10G10R10A2_USCALED,
568 PIPE_FORMAT_R10G10B10A2_SSCALED,
569 PIPE_FORMAT_B10G10R10A2_SSCALED } },
570 { { o(ARB_vertex_type_10f_11f_11f_rev) },
571 { PIPE_FORMAT_R11G11B10_FLOAT } },
572 };
573
574 static const struct st_extension_format_mapping tbo_rgb32[] = {
575 { {o(ARB_texture_buffer_object_rgb32) },
576 { PIPE_FORMAT_R32G32B32_FLOAT,
577 PIPE_FORMAT_R32G32B32_UINT,
578 PIPE_FORMAT_R32G32B32_SINT,
579 } },
580 };
581
582 /*
583 * Extensions that are supported by all Gallium drivers:
584 */
585 extensions->ARB_ES2_compatibility = GL_TRUE;
586 extensions->ARB_draw_elements_base_vertex = GL_TRUE;
587 extensions->ARB_explicit_attrib_location = GL_TRUE;
588 extensions->ARB_explicit_uniform_location = GL_TRUE;
589 extensions->ARB_fragment_coord_conventions = GL_TRUE;
590 extensions->ARB_fragment_program = GL_TRUE;
591 extensions->ARB_fragment_shader = GL_TRUE;
592 extensions->ARB_half_float_vertex = GL_TRUE;
593 extensions->ARB_internalformat_query = GL_TRUE;
594 extensions->ARB_map_buffer_range = GL_TRUE;
595 extensions->ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
596 extensions->ARB_texture_cube_map = GL_TRUE;
597 extensions->ARB_texture_env_combine = GL_TRUE;
598 extensions->ARB_texture_env_crossbar = GL_TRUE;
599 extensions->ARB_texture_env_dot3 = GL_TRUE;
600 extensions->ARB_vertex_program = GL_TRUE;
601 extensions->ARB_vertex_shader = GL_TRUE;
602
603 extensions->EXT_blend_color = GL_TRUE;
604 extensions->EXT_blend_func_separate = GL_TRUE;
605 extensions->EXT_blend_minmax = GL_TRUE;
606 extensions->EXT_gpu_program_parameters = GL_TRUE;
607 extensions->EXT_pixel_buffer_object = GL_TRUE;
608 extensions->EXT_point_parameters = GL_TRUE;
609 extensions->EXT_provoking_vertex = GL_TRUE;
610
611 extensions->EXT_texture_env_dot3 = GL_TRUE;
612 extensions->EXT_vertex_array_bgra = GL_TRUE;
613
614 extensions->ATI_texture_env_combine3 = GL_TRUE;
615
616 extensions->MESA_pack_invert = GL_TRUE;
617
618 extensions->NV_fog_distance = GL_TRUE;
619 extensions->NV_texture_env_combine4 = GL_TRUE;
620 extensions->NV_texture_rectangle = GL_TRUE;
621 extensions->NV_vdpau_interop = GL_TRUE;
622
623 extensions->OES_EGL_image = GL_TRUE;
624 extensions->OES_EGL_image_external = GL_TRUE;
625 extensions->OES_draw_texture = GL_TRUE;
626
627 /* Expose the extensions which directly correspond to gallium caps. */
628 for (i = 0; i < Elements(cap_mapping); i++) {
629 if (screen->get_param(screen, cap_mapping[i].cap)) {
630 extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
631 }
632 }
633
634 /* Expose the extensions which directly correspond to gallium formats. */
635 init_format_extensions(screen, extensions, rendertarget_mapping,
636 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
637 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
638 init_format_extensions(screen, extensions, depthstencil_mapping,
639 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
640 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
641 init_format_extensions(screen, extensions, texture_mapping,
642 Elements(texture_mapping), PIPE_TEXTURE_2D,
643 PIPE_BIND_SAMPLER_VIEW);
644 init_format_extensions(screen, extensions, vertex_mapping,
645 Elements(vertex_mapping), PIPE_BUFFER,
646 PIPE_BIND_VERTEX_BUFFER);
647
648 /* Figure out GLSL support. */
649 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
650
651 consts->GLSLVersion = glsl_feature_level;
652 if (glsl_feature_level >= 330)
653 consts->GLSLVersion = 330;
654
655 _mesa_override_glsl_version(consts);
656
657 if (options->force_glsl_version > 0 &&
658 options->force_glsl_version <= consts->GLSLVersion) {
659 consts->ForceGLSLVersion = options->force_glsl_version;
660 }
661
662 if (glsl_feature_level >= 400)
663 extensions->ARB_gpu_shader5 = GL_TRUE;
664
665 /* This extension needs full OpenGL 3.2, but we don't know if that's
666 * supported at this point. Only check the GLSL version. */
667 if (consts->GLSLVersion >= 150 &&
668 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
669 extensions->AMD_vertex_shader_layer = GL_TRUE;
670 }
671
672 if (consts->GLSLVersion >= 130) {
673 consts->NativeIntegers = GL_TRUE;
674 consts->MaxClipPlanes = 8;
675
676 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
677 extensions->ARB_conservative_depth = GL_TRUE;
678 extensions->ARB_shading_language_packing = GL_TRUE;
679 extensions->OES_depth_texture_cube_map = GL_TRUE;
680 extensions->ARB_shading_language_420pack = GL_TRUE;
681 extensions->ARB_texture_query_levels = GL_TRUE;
682
683 if (!options->disable_shader_bit_encoding) {
684 extensions->ARB_shader_bit_encoding = GL_TRUE;
685 }
686
687 extensions->EXT_shader_integer_mix = GL_TRUE;
688 } else {
689 /* Optional integer support for GLSL 1.2. */
690 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
691 PIPE_SHADER_CAP_INTEGERS) &&
692 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
693 PIPE_SHADER_CAP_INTEGERS)) {
694 consts->NativeIntegers = GL_TRUE;
695
696 extensions->EXT_shader_integer_mix = GL_TRUE;
697 }
698 }
699
700 /* Below are the cases which cannot be moved into tables easily. */
701
702 if (!has_lib_dxtc && !options->force_s3tc_enable) {
703 extensions->EXT_texture_compression_s3tc = GL_FALSE;
704 extensions->ANGLE_texture_compression_dxt = GL_FALSE;
705 }
706
707 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
708 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
709 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
710 extensions->ARB_geometry_shader4 = GL_TRUE;
711 #endif
712 }
713
714 extensions->NV_primitive_restart = GL_TRUE;
715 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
716 consts->PrimitiveRestartInSoftware = GL_TRUE;
717 }
718
719 /* ARB_color_buffer_float. */
720 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
721 extensions->ARB_color_buffer_float = GL_TRUE;
722 }
723
724 if (screen->fence_finish) {
725 extensions->ARB_sync = GL_TRUE;
726 }
727
728 /* Maximum sample count. */
729 {
730 enum pipe_format color_formats[] = {
731 PIPE_FORMAT_R8G8B8A8_UNORM,
732 PIPE_FORMAT_B8G8R8A8_UNORM,
733 PIPE_FORMAT_A8R8G8B8_UNORM,
734 PIPE_FORMAT_A8B8G8R8_UNORM,
735 };
736 enum pipe_format depth_formats[] = {
737 PIPE_FORMAT_Z16_UNORM,
738 PIPE_FORMAT_Z24X8_UNORM,
739 PIPE_FORMAT_X8Z24_UNORM,
740 PIPE_FORMAT_Z32_UNORM,
741 PIPE_FORMAT_Z32_FLOAT
742 };
743 enum pipe_format int_formats[] = {
744 PIPE_FORMAT_R8G8B8A8_SINT
745 };
746
747 consts->MaxSamples =
748 get_max_samples_for_formats(screen, Elements(color_formats),
749 color_formats, 16,
750 PIPE_BIND_RENDER_TARGET);
751
752 consts->MaxColorTextureSamples =
753 get_max_samples_for_formats(screen, Elements(color_formats),
754 color_formats, consts->MaxSamples,
755 PIPE_BIND_SAMPLER_VIEW);
756
757 consts->MaxDepthTextureSamples =
758 get_max_samples_for_formats(screen, Elements(depth_formats),
759 depth_formats, consts->MaxSamples,
760 PIPE_BIND_SAMPLER_VIEW);
761
762 consts->MaxIntegerSamples =
763 get_max_samples_for_formats(screen, Elements(int_formats),
764 int_formats, consts->MaxSamples,
765 PIPE_BIND_SAMPLER_VIEW);
766 }
767 if (consts->MaxSamples == 1) {
768 /* one sample doesn't really make sense */
769 consts->MaxSamples = 0;
770 }
771 else if (consts->MaxSamples >= 2) {
772 extensions->EXT_framebuffer_multisample = GL_TRUE;
773 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
774 }
775
776 if (consts->MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
777 consts->FakeSWMSAA = GL_TRUE;
778 extensions->EXT_framebuffer_multisample = GL_TRUE;
779 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
780 extensions->ARB_texture_multisample = GL_TRUE;
781 }
782
783 if (consts->MaxDualSourceDrawBuffers > 0 &&
784 !options->disable_blend_func_extended)
785 extensions->ARB_blend_func_extended = GL_TRUE;
786
787 if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
788 extensions->ARB_timer_query) {
789 extensions->EXT_timer_query = GL_TRUE;
790 }
791
792 if (extensions->ARB_transform_feedback2 &&
793 extensions->ARB_draw_instanced) {
794 extensions->ARB_transform_feedback_instanced = GL_TRUE;
795 }
796 if (options->force_glsl_extensions_warn)
797 consts->ForceGLSLExtensionsWarn = 1;
798
799 if (options->disable_glsl_line_continuations)
800 consts->DisableGLSLLineContinuations = 1;
801
802 if (options->allow_glsl_extension_directive_midshader)
803 consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
804
805 consts->MinMapBufferAlignment =
806 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
807
808 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
809 extensions->ARB_texture_buffer_object = GL_TRUE;
810
811 consts->MaxTextureBufferSize =
812 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
813 (1u << 31) - 1);
814 consts->TextureBufferOffsetAlignment =
815 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
816
817 if (consts->TextureBufferOffsetAlignment)
818 extensions->ARB_texture_buffer_range = GL_TRUE;
819
820 init_format_extensions(screen, extensions, tbo_rgb32,
821 Elements(tbo_rgb32), PIPE_BUFFER,
822 PIPE_BIND_SAMPLER_VIEW);
823 }
824
825 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
826 extensions->ARB_framebuffer_object = GL_TRUE;
827 }
828
829 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
830 * If the number of available texture indirections is very limited, then we
831 * prefer to disable varying packing rather than run the risk of varying
832 * packing preventing a shader from running.
833 */
834 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
835 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
836 /* We can't disable varying packing if transform feedback is available,
837 * because transform feedback code assumes a packed varying layout.
838 */
839 if (!extensions->EXT_transform_feedback)
840 consts->DisableVaryingPacking = GL_TRUE;
841 }
842
843 if (api == API_OPENGL_CORE) {
844 consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
845 if (consts->MaxViewports >= 16) {
846 consts->ViewportBounds.Min = -16384.0;
847 consts->ViewportBounds.Max = 16384.0;
848 extensions->ARB_viewport_array = GL_TRUE;
849 extensions->ARB_fragment_layer_viewport = GL_TRUE;
850 if (extensions->AMD_vertex_shader_layer)
851 extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
852 }
853 }
854 if (consts->MaxProgramTextureGatherComponents > 0)
855 extensions->ARB_texture_gather = GL_TRUE;
856
857 /* GL_ARB_ES3_compatibility.
858 *
859 * Assume that ES3 is supported if GLSL 3.30 is supported.
860 * (OpenGL 3.3 is a requirement for that extension.)
861 */
862 if (consts->GLSLVersion >= 330 &&
863 /* Requirements for ETC2 emulation. */
864 screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
865 PIPE_TEXTURE_2D, 0,
866 PIPE_BIND_SAMPLER_VIEW) &&
867 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
868 PIPE_TEXTURE_2D, 0,
869 PIPE_BIND_SAMPLER_VIEW) &&
870 screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
871 PIPE_TEXTURE_2D, 0,
872 PIPE_BIND_SAMPLER_VIEW) &&
873 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
874 PIPE_TEXTURE_2D, 0,
875 PIPE_BIND_SAMPLER_VIEW) &&
876 screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
877 PIPE_TEXTURE_2D, 0,
878 PIPE_BIND_SAMPLER_VIEW) &&
879 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
880 PIPE_TEXTURE_2D, 0,
881 PIPE_BIND_SAMPLER_VIEW)) {
882 extensions->ARB_ES3_compatibility = GL_TRUE;
883 }
884 }