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mesa: GL_EXT_fog_coord is not optional
[mesa.git] / src / mesa / state_tracker / st_extensions.c
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 static unsigned _min(unsigned a, unsigned b)
43 {
44 return (a < b) ? a : b;
45 }
46
47 static float _maxf(float a, float b)
48 {
49 return (a > b) ? a : b;
50 }
51
52 static int _clamp(int a, int min, int max)
53 {
54 if (a < min)
55 return min;
56 else if (a > max)
57 return max;
58 else
59 return a;
60 }
61
62
63 /**
64 * Query driver to get implementation limits.
65 * Note that we have to limit/clamp against Mesa's internal limits too.
66 */
67 void st_init_limits(struct st_context *st)
68 {
69 struct pipe_screen *screen = st->pipe->screen;
70 struct gl_constants *c = &st->ctx->Const;
71 gl_shader_type sh;
72 boolean can_ubo = TRUE;
73
74 c->MaxTextureLevels
75 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
76 MAX_TEXTURE_LEVELS);
77
78 c->Max3DTextureLevels
79 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
80 MAX_3D_TEXTURE_LEVELS);
81
82 c->MaxCubeTextureLevels
83 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
84 MAX_CUBE_TEXTURE_LEVELS);
85
86 c->MaxTextureRectSize
87 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
88
89 c->MaxArrayTextureLayers
90 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
91
92 c->MaxCombinedTextureImageUnits
93 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
94 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
95
96 /* Define max viewport size and max renderbuffer size in terms of
97 * max texture size (note: max tex RECT size = max tex 2D size).
98 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
99 */
100 c->MaxViewportWidth =
101 c->MaxViewportHeight =
102 c->MaxRenderbufferSize = c->MaxTextureRectSize;
103
104 c->MaxDrawBuffers = c->MaxColorAttachments =
105 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
106 1, MAX_DRAW_BUFFERS);
107
108 c->MaxDualSourceDrawBuffers
109 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
110 0, MAX_DRAW_BUFFERS);
111
112 c->MaxLineWidth
113 = _maxf(1.0f, screen->get_paramf(screen,
114 PIPE_CAPF_MAX_LINE_WIDTH));
115 c->MaxLineWidthAA
116 = _maxf(1.0f, screen->get_paramf(screen,
117 PIPE_CAPF_MAX_LINE_WIDTH_AA));
118
119 c->MaxPointSize
120 = _maxf(1.0f, screen->get_paramf(screen,
121 PIPE_CAPF_MAX_POINT_WIDTH));
122 c->MaxPointSizeAA
123 = _maxf(1.0f, screen->get_paramf(screen,
124 PIPE_CAPF_MAX_POINT_WIDTH_AA));
125 /* called after _mesa_create_context/_mesa_init_point, fix default user
126 * settable max point size up
127 */
128 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
129 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
130 * for non-aa sizes, but we can go down to 0.0 for aa points.
131 */
132 c->MinPointSize = 1.0f;
133 c->MinPointSizeAA = 0.0f;
134
135 c->MaxTextureMaxAnisotropy
136 = _maxf(2.0f, screen->get_paramf(screen,
137 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
138
139 c->MaxTextureLodBias
140 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
141
142 c->QuadsFollowProvokingVertexConvention = screen->get_param(
143 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
144
145 c->MaxUniformBlockSize =
146 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
147 PIPE_SHADER_CAP_MAX_CONSTS) * 16;
148 if (c->MaxUniformBlockSize < 16384) {
149 can_ubo = FALSE;
150 }
151
152 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
153 struct gl_shader_compiler_options *options =
154 &st->ctx->ShaderCompilerOptions[sh];
155 struct gl_program_constants *pc;
156
157 switch (sh) {
158 case PIPE_SHADER_FRAGMENT:
159 pc = &c->FragmentProgram;
160 break;
161 case PIPE_SHADER_VERTEX:
162 pc = &c->VertexProgram;
163 break;
164 case PIPE_SHADER_GEOMETRY:
165 pc = &c->GeometryProgram;
166 break;
167 default:
168 assert(0);
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 _min(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS),
191 MAX_PROGRAM_ADDRESS_REGS);
192 pc->MaxParameters = pc->MaxNativeParameters =
193 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
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 /* This depends on program constants. */
245 c->MaxTextureCoordUnits
246 = _min(c->FragmentProgram.MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
247
248 c->MaxTextureUnits = _min(c->FragmentProgram.MaxTextureImageUnits, c->MaxTextureCoordUnits);
249
250 c->VertexProgram.MaxAttribs = MIN2(c->VertexProgram.MaxAttribs, 16);
251
252 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
253 * of inputs. It's always 2 colors + N generic inputs. */
254 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
255 PIPE_SHADER_CAP_MAX_INPUTS);
256 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
257 c->MaxVaryingComponents = c->MaxVarying * 4;
258
259 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
260 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
261
262 c->UniformBooleanTrue = ~0;
263
264 c->MaxTransformFeedbackBuffers =
265 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
266 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
267 c->MaxTransformFeedbackSeparateComponents =
268 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
269 c->MaxTransformFeedbackInterleavedComponents =
270 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
271
272 c->StripTextureBorder = GL_TRUE;
273
274 c->GLSLSkipStrictMaxUniformLimitCheck =
275 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
276
277 c->GLSLSkipStrictMaxVaryingLimitCheck =
278 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
279
280 if (can_ubo) {
281 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
282 c->UniformBufferOffsetAlignment =
283 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
284 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
285 c->VertexProgram.MaxUniformBlocks +
286 c->GeometryProgram.MaxUniformBlocks +
287 c->FragmentProgram.MaxUniformBlocks;
288 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
289 }
290 }
291
292
293 static GLboolean st_get_s3tc_override(void)
294 {
295 const char *override = _mesa_getenv("force_s3tc_enable");
296 if (override && !strcmp(override, "true"))
297 return GL_TRUE;
298 return GL_FALSE;
299 }
300
301 /**
302 * Given a member \c x of struct gl_extensions, return offset of
303 * \c x in bytes.
304 */
305 #define o(x) offsetof(struct gl_extensions, x)
306
307
308 struct st_extension_cap_mapping {
309 int extension_offset;
310 int cap;
311 };
312
313 struct st_extension_format_mapping {
314 int extension_offset[2];
315 enum pipe_format format[8];
316
317 /* If TRUE, at least one format must be supported for the extensions to be
318 * advertised. If FALSE, all the formats must be supported. */
319 GLboolean need_at_least_one;
320 };
321
322 /**
323 * Enable extensions if certain pipe formats are supported by the driver.
324 * What extensions will be enabled and what formats must be supported is
325 * described by the array of st_extension_format_mapping.
326 *
327 * target and bind_flags are passed to is_format_supported.
328 */
329 static void init_format_extensions(struct st_context *st,
330 const struct st_extension_format_mapping *mapping,
331 unsigned num_mappings,
332 enum pipe_texture_target target,
333 unsigned bind_flags)
334 {
335 struct pipe_screen *screen = st->pipe->screen;
336 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
337 unsigned i;
338 int j;
339 int num_formats = Elements(mapping->format);
340 int num_ext = Elements(mapping->extension_offset);
341
342 for (i = 0; i < num_mappings; i++) {
343 int num_supported = 0;
344
345 /* Examine each format in the list. */
346 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
347 if (screen->is_format_supported(screen, mapping[i].format[j],
348 target, 0, bind_flags)) {
349 num_supported++;
350 }
351 }
352
353 if (!num_supported ||
354 (!mapping[i].need_at_least_one && num_supported != j)) {
355 continue;
356 }
357
358 /* Enable all extensions in the list. */
359 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
360 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
361 }
362 }
363
364 /**
365 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
366 * which GL extensions are supported.
367 * Quite a few extensions are always supported because they are standard
368 * features or can be built on top of other gallium features.
369 * Some fine tuning may still be needed.
370 */
371 void st_init_extensions(struct st_context *st)
372 {
373 struct pipe_screen *screen = st->pipe->screen;
374 struct gl_context *ctx = st->ctx;
375 int i, glsl_feature_level;
376 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
377
378 static const struct st_extension_cap_mapping cap_mapping[] = {
379 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
380 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
381 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
382 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
383 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
384 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
385 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
386 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
387 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
388 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
389 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
390 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
391 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
392 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
393 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
394 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
395 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
396 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
397
398 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
399 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
400 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP },
401 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
402 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
403 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
404 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
405 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
406 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
407
408 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
409 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
410 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
411 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
412 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
413 /* GL_NV_point_sprite is not supported by gallium because we don't
414 * support the GL_POINT_SPRITE_R_MODE_NV option. */
415 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
416
417 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
418 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
419 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE }
420 };
421
422 /* Required: render target and sampler support */
423 static const struct st_extension_format_mapping rendertarget_mapping[] = {
424 { { o(ARB_texture_float) },
425 { PIPE_FORMAT_R32G32B32A32_FLOAT,
426 PIPE_FORMAT_R16G16B16A16_FLOAT } },
427
428 { { o(ARB_texture_rgb10_a2ui) },
429 { PIPE_FORMAT_B10G10R10A2_UINT } },
430
431 { { o(EXT_framebuffer_sRGB) },
432 { PIPE_FORMAT_A8B8G8R8_SRGB,
433 PIPE_FORMAT_B8G8R8A8_SRGB },
434 GL_TRUE }, /* at least one format must be supported */
435
436 { { o(EXT_packed_float) },
437 { PIPE_FORMAT_R11G11B10_FLOAT } },
438
439 { { o(EXT_texture_integer) },
440 { PIPE_FORMAT_R32G32B32A32_UINT,
441 PIPE_FORMAT_R32G32B32A32_SINT } },
442
443 { { o(ARB_texture_rg) },
444 { PIPE_FORMAT_R8_UNORM,
445 PIPE_FORMAT_R8G8_UNORM } },
446 };
447
448 /* Required: depth stencil and sampler support */
449 static const struct st_extension_format_mapping depthstencil_mapping[] = {
450 { { o(ARB_depth_buffer_float) },
451 { PIPE_FORMAT_Z32_FLOAT,
452 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
453
454 { { o(ARB_framebuffer_object),
455 o(EXT_packed_depth_stencil) },
456 { PIPE_FORMAT_S8_UINT_Z24_UNORM,
457 PIPE_FORMAT_Z24_UNORM_S8_UINT },
458 GL_TRUE }, /* at least one format must be supported */
459 };
460
461 /* Required: sampler support */
462 static const struct st_extension_format_mapping texture_mapping[] = {
463 { { o(ARB_texture_compression_rgtc) },
464 { PIPE_FORMAT_RGTC1_UNORM,
465 PIPE_FORMAT_RGTC1_SNORM,
466 PIPE_FORMAT_RGTC2_UNORM,
467 PIPE_FORMAT_RGTC2_SNORM } },
468
469 { { o(EXT_texture_compression_latc) },
470 { PIPE_FORMAT_LATC1_UNORM,
471 PIPE_FORMAT_LATC1_SNORM,
472 PIPE_FORMAT_LATC2_UNORM,
473 PIPE_FORMAT_LATC2_SNORM } },
474
475 { { o(EXT_texture_compression_s3tc),
476 o(ANGLE_texture_compression_dxt) },
477 { PIPE_FORMAT_DXT1_RGB,
478 PIPE_FORMAT_DXT1_RGBA,
479 PIPE_FORMAT_DXT3_RGBA,
480 PIPE_FORMAT_DXT5_RGBA } },
481
482 { { o(EXT_texture_shared_exponent) },
483 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
484
485 { { o(EXT_texture_snorm) },
486 { PIPE_FORMAT_R8G8B8A8_SNORM } },
487
488 { { o(EXT_texture_sRGB),
489 o(EXT_texture_sRGB_decode) },
490 { PIPE_FORMAT_A8B8G8R8_SRGB,
491 PIPE_FORMAT_B8G8R8A8_SRGB },
492 GL_TRUE }, /* at least one format must be supported */
493
494 { { o(ATI_texture_compression_3dc) },
495 { PIPE_FORMAT_LATC2_UNORM } },
496
497 { { o(MESA_ycbcr_texture) },
498 { PIPE_FORMAT_UYVY,
499 PIPE_FORMAT_YUYV },
500 GL_TRUE }, /* at least one format must be supported */
501
502 { { o(OES_compressed_ETC1_RGB8_texture) },
503 { PIPE_FORMAT_ETC1_RGB8 } },
504 };
505
506 /* Required: vertex fetch support. */
507 static const struct st_extension_format_mapping vertex_mapping[] = {
508 { { o(ARB_vertex_type_2_10_10_10_rev) },
509 { PIPE_FORMAT_R10G10B10A2_UNORM,
510 PIPE_FORMAT_B10G10R10A2_UNORM,
511 PIPE_FORMAT_R10G10B10A2_SNORM,
512 PIPE_FORMAT_B10G10R10A2_SNORM,
513 PIPE_FORMAT_R10G10B10A2_USCALED,
514 PIPE_FORMAT_B10G10R10A2_USCALED,
515 PIPE_FORMAT_R10G10B10A2_SSCALED,
516 PIPE_FORMAT_B10G10R10A2_SSCALED } },
517 };
518
519 static const struct st_extension_format_mapping tbo_rgb32[] = {
520 { {o(ARB_texture_buffer_object_rgb32) },
521 { PIPE_FORMAT_R32G32B32_FLOAT,
522 PIPE_FORMAT_R32G32B32_UINT,
523 PIPE_FORMAT_R32G32B32_SINT,
524 } },
525 };
526
527 /*
528 * Extensions that are supported by all Gallium drivers:
529 */
530 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
531 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
532 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
533 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
534 ctx->Extensions.ARB_fragment_program = GL_TRUE;
535 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
536 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
537 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
538 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
539 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
540 ctx->Extensions.ARB_shader_objects = GL_TRUE;
541 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
542 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
543 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
544 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
545 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
546 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
547 ctx->Extensions.ARB_texture_storage = GL_TRUE;
548 ctx->Extensions.ARB_vertex_program = GL_TRUE;
549 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
550
551 ctx->Extensions.EXT_blend_color = GL_TRUE;
552 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
553 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
554 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
555 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
556 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
557 ctx->Extensions.EXT_point_parameters = GL_TRUE;
558 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
559 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
560 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
561 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
562
563 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
564
565 ctx->Extensions.MESA_pack_invert = GL_TRUE;
566
567 ctx->Extensions.NV_blend_square = GL_TRUE;
568 ctx->Extensions.NV_fog_distance = GL_TRUE;
569 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
570 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
571
572 ctx->Extensions.OES_EGL_image = GL_TRUE;
573 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
574 ctx->Extensions.OES_draw_texture = GL_TRUE;
575
576 /* Expose the extensions which directly correspond to gallium caps. */
577 for (i = 0; i < Elements(cap_mapping); i++) {
578 if (screen->get_param(screen, cap_mapping[i].cap)) {
579 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
580 }
581 }
582
583 /* Expose the extensions which directly correspond to gallium formats. */
584 init_format_extensions(st, rendertarget_mapping,
585 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
586 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
587 init_format_extensions(st, depthstencil_mapping,
588 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
589 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
590 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
591 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
592 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
593 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
594
595 /* Figure out GLSL support. */
596 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
597
598 if (glsl_feature_level >= 140) {
599 ctx->Const.GLSLVersion = 140;
600 } else if (glsl_feature_level >= 130) {
601 ctx->Const.GLSLVersion = 130;
602 } else {
603 ctx->Const.GLSLVersion = 120;
604 }
605
606 _mesa_override_glsl_version(st->ctx);
607
608 if (ctx->Const.GLSLVersion >= 130) {
609 ctx->Const.NativeIntegers = GL_TRUE;
610 ctx->Const.MaxClipPlanes = 8;
611
612 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
613 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
614 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
615 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
616 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
617 } else {
618 /* Optional integer support for GLSL 1.2. */
619 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
620 PIPE_SHADER_CAP_INTEGERS) &&
621 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
622 PIPE_SHADER_CAP_INTEGERS)) {
623 ctx->Const.NativeIntegers = GL_TRUE;
624 }
625 }
626
627 /* Below are the cases which cannot be moved into tables easily. */
628
629 if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) {
630 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
631 ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
632 }
633
634 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
635 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
636 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
637 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
638 #endif
639 }
640
641 ctx->Extensions.NV_primitive_restart = GL_TRUE;
642 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
643 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
644 }
645
646 /* ARB_color_buffer_float. */
647 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
648 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
649
650 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
651 st->clamp_vert_color_in_shader = TRUE;
652 }
653
654 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
655 st->clamp_frag_color_in_shader = TRUE;
656 }
657
658 /* For drivers which cannot do color clamping, it's better to just
659 * disable ARB_color_buffer_float in the core profile, because
660 * the clamping is deprecated there anyway. */
661 if (ctx->API == API_OPENGL_CORE &&
662 (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
663 st->clamp_vert_color_in_shader = GL_FALSE;
664 st->clamp_frag_color_in_shader = GL_FALSE;
665 ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
666 }
667 }
668
669 if (screen->fence_finish) {
670 ctx->Extensions.ARB_sync = GL_TRUE;
671 }
672
673 /* Maximum sample count. */
674 for (i = 16; i > 0; --i) {
675 enum pipe_format pformat = st_choose_format(st, GL_RGBA,
676 GL_NONE, GL_NONE,
677 PIPE_TEXTURE_2D, i,
678 PIPE_BIND_RENDER_TARGET, FALSE);
679 if (pformat != PIPE_FORMAT_NONE) {
680 ctx->Const.MaxSamples = i;
681 ctx->Const.MaxColorTextureSamples = i;
682 break;
683 }
684 }
685 for (i = ctx->Const.MaxSamples; i > 0; --i) {
686 enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
687 GL_NONE, GL_NONE,
688 PIPE_TEXTURE_2D, i,
689 PIPE_BIND_DEPTH_STENCIL, FALSE);
690 if (pformat != PIPE_FORMAT_NONE) {
691 ctx->Const.MaxDepthTextureSamples = i;
692 break;
693 }
694 }
695 for (i = ctx->Const.MaxSamples; i > 0; --i) {
696 enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
697 GL_NONE, GL_NONE,
698 PIPE_TEXTURE_2D, i,
699 PIPE_BIND_RENDER_TARGET, FALSE);
700 if (pformat != PIPE_FORMAT_NONE) {
701 ctx->Const.MaxIntegerSamples = i;
702 break;
703 }
704 }
705 if (ctx->Const.MaxSamples == 1) {
706 /* one sample doesn't really make sense */
707 ctx->Const.MaxSamples = 0;
708 }
709 else if (ctx->Const.MaxSamples >= 2) {
710 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
711 }
712
713 if (ctx->Const.MaxDualSourceDrawBuffers > 0)
714 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
715
716 st->has_time_elapsed =
717 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
718
719 if (st->has_time_elapsed ||
720 ctx->Extensions.ARB_timer_query) {
721 ctx->Extensions.EXT_timer_query = GL_TRUE;
722 }
723
724 if (ctx->Extensions.ARB_transform_feedback2 &&
725 ctx->Extensions.ARB_draw_instanced) {
726 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
727 }
728 if (st->options.force_glsl_extensions_warn)
729 ctx->Const.ForceGLSLExtensionsWarn = 1;
730
731 if (st->options.disable_glsl_line_continuations)
732 ctx->Const.DisableGLSLLineContinuations = 1;
733
734 ctx->Const.MinMapBufferAlignment =
735 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
736 if (ctx->Const.MinMapBufferAlignment >= 64) {
737 ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
738 }
739 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
740 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
741
742 ctx->Const.MaxTextureBufferSize =
743 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
744 (1u << 31) - 1);
745 ctx->Const.TextureBufferOffsetAlignment =
746 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
747
748 if (ctx->Const.TextureBufferOffsetAlignment)
749 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
750
751 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
752 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
753 }
754
755
756 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
757 * If the number of available texture indirections is very limited, then we
758 * prefer to disable varying packing rather than run the risk of varying
759 * packing preventing a shader from running.
760 */
761 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
762 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
763 /* We can't disable varying packing if transform feedback is available,
764 * because transform feedback code assumes a packed varying layout.
765 */
766 if (!ctx->Extensions.EXT_transform_feedback)
767 ctx->Const.DisableVaryingPacking = GL_TRUE;
768 }
769 }