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gallium: Enable ARB_clip_control for gallium drivers.
[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 default:
169 /* compute shader, etc. */
170 continue;
171 }
172
173 pc->MaxTextureImageUnits =
174 _min(screen->get_shader_param(screen, sh,
175 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
176 MAX_TEXTURE_IMAGE_UNITS);
177
178 pc->MaxInstructions = pc->MaxNativeInstructions =
179 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
180 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
181 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
182 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
183 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
184 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
185 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
186 pc->MaxAttribs = pc->MaxNativeAttribs =
187 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
188 pc->MaxTemps = pc->MaxNativeTemps =
189 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
190 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
191 sh == PIPE_SHADER_VERTEX ? 1 : 0;
192 pc->MaxParameters = pc->MaxNativeParameters =
193 screen->get_shader_param(screen, sh,
194 PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
195 pc->MaxInputComponents =
196 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS) * 4;
197 pc->MaxOutputComponents =
198 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_OUTPUTS) * 4;
199
200 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
201
202 pc->MaxUniformBlocks =
203 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
204 if (pc->MaxUniformBlocks)
205 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
206 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
207
208 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
209 c->MaxUniformBlockSize / 4 *
210 pc->MaxUniformBlocks);
211
212 /* Gallium doesn't really care about local vs. env parameters so use the
213 * same limits.
214 */
215 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
216 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
217
218 options->EmitNoNoise = TRUE;
219
220 /* TODO: make these more fine-grained if anyone needs it */
221 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
222 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
223 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
224 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
225
226 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
227
228 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
229 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
230 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
231 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
232 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
233 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
234 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
235 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
236
237 if (pc->MaxNativeInstructions &&
238 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
239 can_ubo = FALSE;
240 }
241
242 if (options->EmitNoLoops)
243 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
244 else
245 options->MaxUnrollIterations = 255; /* SM3 limit */
246 options->LowerClipDistance = true;
247 }
248
249 c->MaxCombinedTextureImageUnits =
250 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
251 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
252 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
253 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
254
255 /* This depends on program constants. */
256 c->MaxTextureCoordUnits
257 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
258
259 c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
260
261 c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
262
263 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
264 * of inputs. It's always 2 colors + N generic inputs. */
265 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
266 PIPE_SHADER_CAP_MAX_INPUTS);
267 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
268 c->MaxGeometryOutputVertices = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
269 c->MaxGeometryTotalOutputComponents = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
270
271 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
272 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
273
274 c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
275 c->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
276 c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
277
278 c->MaxTransformFeedbackBuffers =
279 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
280 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
281 c->MaxTransformFeedbackSeparateComponents =
282 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
283 c->MaxTransformFeedbackInterleavedComponents =
284 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
285 c->MaxVertexStreams =
286 MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));
287
288 /* The vertex stream must fit into pipe_stream_output_info::stream */
289 assert(c->MaxVertexStreams <= 4);
290
291 c->MaxVertexAttribStride
292 = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);
293
294 c->StripTextureBorder = GL_TRUE;
295
296 c->GLSLSkipStrictMaxUniformLimitCheck =
297 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
298
299 if (can_ubo) {
300 extensions->ARB_uniform_buffer_object = GL_TRUE;
301 c->UniformBufferOffsetAlignment =
302 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
303 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
304 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
305 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
306 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
307 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
308 }
309 }
310
311
312 /**
313 * Given a member \c x of struct gl_extensions, return offset of
314 * \c x in bytes.
315 */
316 #define o(x) offsetof(struct gl_extensions, x)
317
318
319 struct st_extension_cap_mapping {
320 int extension_offset;
321 int cap;
322 };
323
324 struct st_extension_format_mapping {
325 int extension_offset[2];
326 enum pipe_format format[8];
327
328 /* If TRUE, at least one format must be supported for the extensions to be
329 * advertised. If FALSE, all the formats must be supported. */
330 GLboolean need_at_least_one;
331 };
332
333 /**
334 * Enable extensions if certain pipe formats are supported by the driver.
335 * What extensions will be enabled and what formats must be supported is
336 * described by the array of st_extension_format_mapping.
337 *
338 * target and bind_flags are passed to is_format_supported.
339 */
340 static void
341 init_format_extensions(struct pipe_screen *screen,
342 struct gl_extensions *extensions,
343 const struct st_extension_format_mapping *mapping,
344 unsigned num_mappings,
345 enum pipe_texture_target target,
346 unsigned bind_flags)
347 {
348 GLboolean *extension_table = (GLboolean *) extensions;
349 unsigned i;
350 int j;
351 int num_formats = Elements(mapping->format);
352 int num_ext = Elements(mapping->extension_offset);
353
354 for (i = 0; i < num_mappings; i++) {
355 int num_supported = 0;
356
357 /* Examine each format in the list. */
358 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
359 if (screen->is_format_supported(screen, mapping[i].format[j],
360 target, 0, bind_flags)) {
361 num_supported++;
362 }
363 }
364
365 if (!num_supported ||
366 (!mapping[i].need_at_least_one && num_supported != j)) {
367 continue;
368 }
369
370 /* Enable all extensions in the list. */
371 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
372 extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
373 }
374 }
375
376
377 /**
378 * Given a list of formats and bind flags, return the maximum number
379 * of samples supported by any of those formats.
380 */
381 static unsigned
382 get_max_samples_for_formats(struct pipe_screen *screen,
383 unsigned num_formats,
384 enum pipe_format *formats,
385 unsigned max_samples,
386 unsigned bind)
387 {
388 unsigned i, f;
389
390 for (i = max_samples; i > 0; --i) {
391 for (f = 0; f < num_formats; f++) {
392 if (screen->is_format_supported(screen, formats[f],
393 PIPE_TEXTURE_2D, i, bind)) {
394 return i;
395 }
396 }
397 }
398 return 0;
399 }
400
401
402 /**
403 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
404 * which GL extensions are supported.
405 * Quite a few extensions are always supported because they are standard
406 * features or can be built on top of other gallium features.
407 * Some fine tuning may still be needed.
408 */
409 void st_init_extensions(struct pipe_screen *screen,
410 struct gl_constants *consts,
411 struct gl_extensions *extensions,
412 struct st_config_options *options,
413 boolean has_lib_dxtc)
414 {
415 int i, glsl_feature_level;
416 GLboolean *extension_table = (GLboolean *) extensions;
417
418 static const struct st_extension_cap_mapping cap_mapping[] = {
419 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
420 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
421 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
422 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
423 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
424 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
425 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
426 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
427 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
428 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
429 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
430 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
431 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
432 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
433 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
434 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
435 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
436 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
437 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
438 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
439
440 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
441 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
442 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
443 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
444 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
445 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
446 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
447 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
448
449 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
450 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
451 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
452 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
453 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
454 /* GL_NV_point_sprite is not supported by gallium because we don't
455 * support the GL_POINT_SPRITE_R_MODE_NV option. */
456
457 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
458 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
459 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
460 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
461 { o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
462 { o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
463 { o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
464 { o(ARB_conditional_render_inverted), PIPE_CAP_CONDITIONAL_RENDER_INVERTED },
465 { o(ARB_texture_view), PIPE_CAP_SAMPLER_VIEW_TARGET },
466 { o(ARB_clip_control), PIPE_CAP_CLIP_HALFZ },
467 };
468
469 /* Required: render target and sampler support */
470 static const struct st_extension_format_mapping rendertarget_mapping[] = {
471 { { o(ARB_texture_float) },
472 { PIPE_FORMAT_R32G32B32A32_FLOAT,
473 PIPE_FORMAT_R16G16B16A16_FLOAT } },
474
475 { { o(ARB_texture_rgb10_a2ui) },
476 { PIPE_FORMAT_R10G10B10A2_UINT,
477 PIPE_FORMAT_B10G10R10A2_UINT },
478 GL_TRUE }, /* at least one format must be supported */
479
480 { { o(EXT_framebuffer_sRGB) },
481 { PIPE_FORMAT_A8B8G8R8_SRGB,
482 PIPE_FORMAT_B8G8R8A8_SRGB },
483 GL_TRUE }, /* at least one format must be supported */
484
485 { { o(EXT_packed_float) },
486 { PIPE_FORMAT_R11G11B10_FLOAT } },
487
488 { { o(EXT_texture_integer) },
489 { PIPE_FORMAT_R32G32B32A32_UINT,
490 PIPE_FORMAT_R32G32B32A32_SINT } },
491
492 { { o(ARB_texture_rg) },
493 { PIPE_FORMAT_R8_UNORM,
494 PIPE_FORMAT_R8G8_UNORM } },
495 };
496
497 /* Required: depth stencil and sampler support */
498 static const struct st_extension_format_mapping depthstencil_mapping[] = {
499 { { o(ARB_depth_buffer_float) },
500 { PIPE_FORMAT_Z32_FLOAT,
501 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
502 };
503
504 /* Required: sampler support */
505 static const struct st_extension_format_mapping texture_mapping[] = {
506 { { o(ARB_texture_compression_rgtc) },
507 { PIPE_FORMAT_RGTC1_UNORM,
508 PIPE_FORMAT_RGTC1_SNORM,
509 PIPE_FORMAT_RGTC2_UNORM,
510 PIPE_FORMAT_RGTC2_SNORM } },
511
512 { { o(EXT_texture_compression_latc) },
513 { PIPE_FORMAT_LATC1_UNORM,
514 PIPE_FORMAT_LATC1_SNORM,
515 PIPE_FORMAT_LATC2_UNORM,
516 PIPE_FORMAT_LATC2_SNORM } },
517
518 { { o(EXT_texture_compression_s3tc),
519 o(ANGLE_texture_compression_dxt) },
520 { PIPE_FORMAT_DXT1_RGB,
521 PIPE_FORMAT_DXT1_RGBA,
522 PIPE_FORMAT_DXT3_RGBA,
523 PIPE_FORMAT_DXT5_RGBA } },
524
525 { { o(ARB_texture_compression_bptc) },
526 { PIPE_FORMAT_BPTC_RGBA_UNORM,
527 PIPE_FORMAT_BPTC_SRGBA,
528 PIPE_FORMAT_BPTC_RGB_FLOAT,
529 PIPE_FORMAT_BPTC_RGB_UFLOAT } },
530
531 { { o(EXT_texture_shared_exponent) },
532 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
533
534 { { o(EXT_texture_snorm) },
535 { PIPE_FORMAT_R8G8B8A8_SNORM } },
536
537 { { o(EXT_texture_sRGB),
538 o(EXT_texture_sRGB_decode) },
539 { PIPE_FORMAT_A8B8G8R8_SRGB,
540 PIPE_FORMAT_B8G8R8A8_SRGB },
541 GL_TRUE }, /* at least one format must be supported */
542
543 { { o(ATI_texture_compression_3dc) },
544 { PIPE_FORMAT_LATC2_UNORM } },
545
546 { { o(MESA_ycbcr_texture) },
547 { PIPE_FORMAT_UYVY,
548 PIPE_FORMAT_YUYV },
549 GL_TRUE }, /* at least one format must be supported */
550
551 { { o(OES_compressed_ETC1_RGB8_texture) },
552 { PIPE_FORMAT_ETC1_RGB8,
553 PIPE_FORMAT_R8G8B8A8_UNORM },
554 GL_TRUE }, /* at least one format must be supported */
555
556 { { o(ARB_stencil_texturing) },
557 { PIPE_FORMAT_X24S8_UINT,
558 PIPE_FORMAT_S8X24_UINT },
559 GL_TRUE }, /* at least one format must be supported */
560 };
561
562 /* Required: vertex fetch support. */
563 static const struct st_extension_format_mapping vertex_mapping[] = {
564 { { o(ARB_vertex_type_2_10_10_10_rev) },
565 { PIPE_FORMAT_R10G10B10A2_UNORM,
566 PIPE_FORMAT_B10G10R10A2_UNORM,
567 PIPE_FORMAT_R10G10B10A2_SNORM,
568 PIPE_FORMAT_B10G10R10A2_SNORM,
569 PIPE_FORMAT_R10G10B10A2_USCALED,
570 PIPE_FORMAT_B10G10R10A2_USCALED,
571 PIPE_FORMAT_R10G10B10A2_SSCALED,
572 PIPE_FORMAT_B10G10R10A2_SSCALED } },
573 { { o(ARB_vertex_type_10f_11f_11f_rev) },
574 { PIPE_FORMAT_R11G11B10_FLOAT } },
575 };
576
577 static const struct st_extension_format_mapping tbo_rgb32[] = {
578 { {o(ARB_texture_buffer_object_rgb32) },
579 { PIPE_FORMAT_R32G32B32_FLOAT,
580 PIPE_FORMAT_R32G32B32_UINT,
581 PIPE_FORMAT_R32G32B32_SINT,
582 } },
583 };
584
585 /*
586 * Extensions that are supported by all Gallium drivers:
587 */
588 extensions->ARB_ES2_compatibility = GL_TRUE;
589 extensions->ARB_draw_elements_base_vertex = GL_TRUE;
590 extensions->ARB_explicit_attrib_location = GL_TRUE;
591 extensions->ARB_explicit_uniform_location = GL_TRUE;
592 extensions->ARB_fragment_coord_conventions = GL_TRUE;
593 extensions->ARB_fragment_program = GL_TRUE;
594 extensions->ARB_fragment_shader = GL_TRUE;
595 extensions->ARB_half_float_vertex = GL_TRUE;
596 extensions->ARB_internalformat_query = GL_TRUE;
597 extensions->ARB_map_buffer_range = GL_TRUE;
598 extensions->ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
599 extensions->ARB_texture_cube_map = GL_TRUE;
600 extensions->ARB_texture_env_combine = GL_TRUE;
601 extensions->ARB_texture_env_crossbar = GL_TRUE;
602 extensions->ARB_texture_env_dot3 = GL_TRUE;
603 extensions->ARB_vertex_program = GL_TRUE;
604 extensions->ARB_vertex_shader = GL_TRUE;
605
606 extensions->EXT_blend_color = GL_TRUE;
607 extensions->EXT_blend_func_separate = GL_TRUE;
608 extensions->EXT_blend_minmax = GL_TRUE;
609 extensions->EXT_gpu_program_parameters = GL_TRUE;
610 extensions->EXT_pixel_buffer_object = GL_TRUE;
611 extensions->EXT_point_parameters = GL_TRUE;
612 extensions->EXT_provoking_vertex = GL_TRUE;
613
614 extensions->EXT_texture_env_dot3 = GL_TRUE;
615 extensions->EXT_vertex_array_bgra = GL_TRUE;
616
617 extensions->ATI_texture_env_combine3 = GL_TRUE;
618
619 extensions->MESA_pack_invert = GL_TRUE;
620
621 extensions->NV_fog_distance = GL_TRUE;
622 extensions->NV_texture_env_combine4 = GL_TRUE;
623 extensions->NV_texture_rectangle = GL_TRUE;
624
625 extensions->OES_EGL_image = GL_TRUE;
626 extensions->OES_EGL_image_external = GL_TRUE;
627 extensions->OES_draw_texture = GL_TRUE;
628
629 /* Expose the extensions which directly correspond to gallium caps. */
630 for (i = 0; i < Elements(cap_mapping); i++) {
631 if (screen->get_param(screen, cap_mapping[i].cap)) {
632 extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
633 }
634 }
635
636 /* Expose the extensions which directly correspond to gallium formats. */
637 init_format_extensions(screen, extensions, rendertarget_mapping,
638 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
639 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
640 init_format_extensions(screen, extensions, depthstencil_mapping,
641 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
642 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
643 init_format_extensions(screen, extensions, texture_mapping,
644 Elements(texture_mapping), PIPE_TEXTURE_2D,
645 PIPE_BIND_SAMPLER_VIEW);
646 init_format_extensions(screen, extensions, vertex_mapping,
647 Elements(vertex_mapping), PIPE_BUFFER,
648 PIPE_BIND_VERTEX_BUFFER);
649
650 /* Figure out GLSL support. */
651 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
652
653 consts->GLSLVersion = glsl_feature_level;
654 if (glsl_feature_level >= 330)
655 consts->GLSLVersion = 330;
656
657 _mesa_override_glsl_version(consts);
658
659 if (options->force_glsl_version > 0 &&
660 options->force_glsl_version <= consts->GLSLVersion) {
661 consts->ForceGLSLVersion = options->force_glsl_version;
662 }
663
664 if (glsl_feature_level >= 400)
665 extensions->ARB_gpu_shader5 = GL_TRUE;
666
667 /* This extension needs full OpenGL 3.2, but we don't know if that's
668 * supported at this point. Only check the GLSL version. */
669 if (consts->GLSLVersion >= 150 &&
670 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
671 extensions->AMD_vertex_shader_layer = GL_TRUE;
672 }
673
674 if (consts->GLSLVersion >= 130) {
675 consts->NativeIntegers = GL_TRUE;
676 consts->MaxClipPlanes = 8;
677
678 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
679 extensions->ARB_conservative_depth = GL_TRUE;
680 extensions->ARB_shading_language_packing = GL_TRUE;
681 extensions->OES_depth_texture_cube_map = GL_TRUE;
682 extensions->ARB_shading_language_420pack = GL_TRUE;
683 extensions->ARB_texture_query_levels = GL_TRUE;
684
685 if (!options->disable_shader_bit_encoding) {
686 extensions->ARB_shader_bit_encoding = GL_TRUE;
687 }
688
689 extensions->EXT_shader_integer_mix = GL_TRUE;
690 } else {
691 /* Optional integer support for GLSL 1.2. */
692 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
693 PIPE_SHADER_CAP_INTEGERS) &&
694 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
695 PIPE_SHADER_CAP_INTEGERS)) {
696 consts->NativeIntegers = GL_TRUE;
697
698 extensions->EXT_shader_integer_mix = GL_TRUE;
699 }
700 }
701
702 consts->UniformBooleanTrue = consts->NativeIntegers ? ~0 : fui(1.0f);
703
704 /* Below are the cases which cannot be moved into tables easily. */
705
706 if (!has_lib_dxtc && !options->force_s3tc_enable) {
707 extensions->EXT_texture_compression_s3tc = GL_FALSE;
708 extensions->ANGLE_texture_compression_dxt = GL_FALSE;
709 }
710
711 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
712 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
713 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
714 extensions->ARB_geometry_shader4 = GL_TRUE;
715 #endif
716 }
717
718 if (screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
719 extensions->NV_primitive_restart = GL_TRUE;
720 }
721
722 /* ARB_color_buffer_float. */
723 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
724 extensions->ARB_color_buffer_float = GL_TRUE;
725 }
726
727 if (screen->fence_finish) {
728 extensions->ARB_sync = GL_TRUE;
729 }
730
731 /* Maximum sample count. */
732 {
733 enum pipe_format color_formats[] = {
734 PIPE_FORMAT_R8G8B8A8_UNORM,
735 PIPE_FORMAT_B8G8R8A8_UNORM,
736 PIPE_FORMAT_A8R8G8B8_UNORM,
737 PIPE_FORMAT_A8B8G8R8_UNORM,
738 };
739 enum pipe_format depth_formats[] = {
740 PIPE_FORMAT_Z16_UNORM,
741 PIPE_FORMAT_Z24X8_UNORM,
742 PIPE_FORMAT_X8Z24_UNORM,
743 PIPE_FORMAT_Z32_UNORM,
744 PIPE_FORMAT_Z32_FLOAT
745 };
746 enum pipe_format int_formats[] = {
747 PIPE_FORMAT_R8G8B8A8_SINT
748 };
749
750 consts->MaxSamples =
751 get_max_samples_for_formats(screen, Elements(color_formats),
752 color_formats, 16,
753 PIPE_BIND_RENDER_TARGET);
754
755 consts->MaxColorTextureSamples =
756 get_max_samples_for_formats(screen, Elements(color_formats),
757 color_formats, consts->MaxSamples,
758 PIPE_BIND_SAMPLER_VIEW);
759
760 consts->MaxDepthTextureSamples =
761 get_max_samples_for_formats(screen, Elements(depth_formats),
762 depth_formats, consts->MaxSamples,
763 PIPE_BIND_SAMPLER_VIEW);
764
765 consts->MaxIntegerSamples =
766 get_max_samples_for_formats(screen, Elements(int_formats),
767 int_formats, consts->MaxSamples,
768 PIPE_BIND_SAMPLER_VIEW);
769 }
770 if (consts->MaxSamples == 1) {
771 /* one sample doesn't really make sense */
772 consts->MaxSamples = 0;
773 }
774 else if (consts->MaxSamples >= 2) {
775 extensions->EXT_framebuffer_multisample = GL_TRUE;
776 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
777 }
778
779 if (consts->MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
780 consts->FakeSWMSAA = GL_TRUE;
781 extensions->EXT_framebuffer_multisample = GL_TRUE;
782 extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
783 extensions->ARB_texture_multisample = GL_TRUE;
784 }
785
786 if (consts->MaxDualSourceDrawBuffers > 0 &&
787 !options->disable_blend_func_extended)
788 extensions->ARB_blend_func_extended = GL_TRUE;
789
790 if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
791 extensions->ARB_timer_query) {
792 extensions->EXT_timer_query = GL_TRUE;
793 }
794
795 if (extensions->ARB_transform_feedback2 &&
796 extensions->ARB_draw_instanced) {
797 extensions->ARB_transform_feedback_instanced = GL_TRUE;
798 }
799 if (options->force_glsl_extensions_warn)
800 consts->ForceGLSLExtensionsWarn = 1;
801
802 if (options->disable_glsl_line_continuations)
803 consts->DisableGLSLLineContinuations = 1;
804
805 if (options->allow_glsl_extension_directive_midshader)
806 consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
807
808 consts->MinMapBufferAlignment =
809 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
810
811 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
812 extensions->ARB_texture_buffer_object = GL_TRUE;
813
814 consts->MaxTextureBufferSize =
815 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
816 (1u << 31) - 1);
817 consts->TextureBufferOffsetAlignment =
818 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
819
820 if (consts->TextureBufferOffsetAlignment)
821 extensions->ARB_texture_buffer_range = GL_TRUE;
822
823 init_format_extensions(screen, extensions, tbo_rgb32,
824 Elements(tbo_rgb32), PIPE_BUFFER,
825 PIPE_BIND_SAMPLER_VIEW);
826 }
827
828 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
829 extensions->ARB_framebuffer_object = GL_TRUE;
830 }
831
832 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
833 * If the number of available texture indirections is very limited, then we
834 * prefer to disable varying packing rather than run the risk of varying
835 * packing preventing a shader from running.
836 */
837 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
838 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
839 /* We can't disable varying packing if transform feedback is available,
840 * because transform feedback code assumes a packed varying layout.
841 */
842 if (!extensions->EXT_transform_feedback)
843 consts->DisableVaryingPacking = GL_TRUE;
844 }
845
846 consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
847 if (consts->MaxViewports >= 16) {
848 consts->ViewportBounds.Min = -16384.0;
849 consts->ViewportBounds.Max = 16384.0;
850 extensions->ARB_viewport_array = GL_TRUE;
851 extensions->ARB_fragment_layer_viewport = GL_TRUE;
852 if (extensions->AMD_vertex_shader_layer)
853 extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
854 }
855
856 if (consts->MaxProgramTextureGatherComponents > 0)
857 extensions->ARB_texture_gather = GL_TRUE;
858
859 /* GL_ARB_ES3_compatibility.
860 *
861 * Assume that ES3 is supported if GLSL 3.30 is supported.
862 * (OpenGL 3.3 is a requirement for that extension.)
863 */
864 if (consts->GLSLVersion >= 330 &&
865 /* Requirements for ETC2 emulation. */
866 screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
867 PIPE_TEXTURE_2D, 0,
868 PIPE_BIND_SAMPLER_VIEW) &&
869 screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
870 PIPE_TEXTURE_2D, 0,
871 PIPE_BIND_SAMPLER_VIEW) &&
872 screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
873 PIPE_TEXTURE_2D, 0,
874 PIPE_BIND_SAMPLER_VIEW) &&
875 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
876 PIPE_TEXTURE_2D, 0,
877 PIPE_BIND_SAMPLER_VIEW) &&
878 screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
879 PIPE_TEXTURE_2D, 0,
880 PIPE_BIND_SAMPLER_VIEW) &&
881 screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
882 PIPE_TEXTURE_2D, 0,
883 PIPE_BIND_SAMPLER_VIEW)) {
884 extensions->ARB_ES3_compatibility = GL_TRUE;
885 }
886
887 if (screen->get_video_param &&
888 screen->get_video_param(screen, PIPE_VIDEO_PROFILE_UNKNOWN,
889 PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
890 PIPE_VIDEO_CAP_SUPPORTS_INTERLACED)) {
891 extensions->NV_vdpau_interop = GL_TRUE;
892 }
893 }