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[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 int _min(int a, int 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 int max_const_buffers;
74
75 c->MaxTextureLevels
76 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
77 MAX_TEXTURE_LEVELS);
78
79 c->Max3DTextureLevels
80 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
81 MAX_3D_TEXTURE_LEVELS);
82
83 c->MaxCubeTextureLevels
84 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
85 MAX_CUBE_TEXTURE_LEVELS);
86
87 c->MaxTextureRectSize
88 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
89
90 c->MaxArrayTextureLayers
91 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
92
93 c->FragmentProgram.MaxTextureImageUnits
94 = _min(screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
95 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
96 MAX_TEXTURE_IMAGE_UNITS);
97
98 c->VertexProgram.MaxTextureImageUnits
99 = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
100 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
101 MAX_TEXTURE_IMAGE_UNITS);
102
103 c->MaxCombinedTextureImageUnits
104 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
105 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
106
107 c->MaxTextureCoordUnits
108 = _min(c->FragmentProgram.MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
109
110 c->MaxTextureUnits = _min(c->FragmentProgram.MaxTextureImageUnits, c->MaxTextureCoordUnits);
111
112 /* Define max viewport size and max renderbuffer size in terms of
113 * max texture size (note: max tex RECT size = max tex 2D size).
114 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
115 */
116 c->MaxViewportWidth =
117 c->MaxViewportHeight =
118 c->MaxRenderbufferSize = c->MaxTextureRectSize;
119
120 c->MaxDrawBuffers
121 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
122 1, MAX_DRAW_BUFFERS);
123
124 c->MaxDualSourceDrawBuffers
125 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
126 0, MAX_DRAW_BUFFERS);
127
128 c->MaxLineWidth
129 = _maxf(1.0f, screen->get_paramf(screen,
130 PIPE_CAPF_MAX_LINE_WIDTH));
131 c->MaxLineWidthAA
132 = _maxf(1.0f, screen->get_paramf(screen,
133 PIPE_CAPF_MAX_LINE_WIDTH_AA));
134
135 c->MaxPointSize
136 = _maxf(1.0f, screen->get_paramf(screen,
137 PIPE_CAPF_MAX_POINT_WIDTH));
138 c->MaxPointSizeAA
139 = _maxf(1.0f, screen->get_paramf(screen,
140 PIPE_CAPF_MAX_POINT_WIDTH_AA));
141 /* called after _mesa_create_context/_mesa_init_point, fix default user
142 * settable max point size up
143 */
144 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
145 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
146 * for non-aa sizes, but we can go down to 0.0 for aa points.
147 */
148 c->MinPointSize = 1.0f;
149 c->MinPointSizeAA = 0.0f;
150
151 c->MaxTextureMaxAnisotropy
152 = _maxf(2.0f, screen->get_paramf(screen,
153 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
154
155 c->MaxTextureLodBias
156 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
157
158 c->MaxDrawBuffers
159 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
160 1, MAX_DRAW_BUFFERS);
161
162 c->QuadsFollowProvokingVertexConvention = screen->get_param(
163 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
164
165 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
166 struct gl_shader_compiler_options *options =
167 &st->ctx->ShaderCompilerOptions[sh];
168 struct gl_program_constants *pc;
169
170 switch (sh) {
171 case PIPE_SHADER_FRAGMENT:
172 pc = &c->FragmentProgram;
173 break;
174 case PIPE_SHADER_VERTEX:
175 pc = &c->VertexProgram;
176 break;
177 case PIPE_SHADER_GEOMETRY:
178 pc = &c->GeometryProgram;
179 break;
180 default:
181 assert(0);
182 continue;
183 }
184
185 pc->MaxNativeInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
186 pc->MaxNativeAluInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
187 pc->MaxNativeTexInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
188 pc->MaxNativeTexIndirections = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
189 pc->MaxNativeAttribs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
190 pc->MaxNativeTemps = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
191 pc->MaxNativeAddressRegs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS);
192 pc->MaxNativeParameters = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
193 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
194 /* raise MaxParameters if native support is higher */
195 pc->MaxParameters = MAX2(pc->MaxParameters, pc->MaxNativeParameters);
196
197 /* Gallium doesn't really care about local vs. env parameters so use the
198 * same limits.
199 */
200 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
201 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
202
203 options->EmitNoNoise = TRUE;
204
205 /* TODO: make these more fine-grained if anyone needs it */
206 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
207 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
208 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
209 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
210
211 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
212
213 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
214 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
215 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
216 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
217 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
218 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
219 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
220 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
221
222 if (pc->MaxNativeInstructions) {
223 if (options->EmitNoIndirectUniform)
224 can_ubo = FALSE;
225
226 max_const_buffers = screen->get_shader_param(screen, sh,
227 PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
228 /* we need 13 buffers - 1 constant, 12 UBO */
229 if (max_const_buffers < 13)
230 can_ubo = FALSE;
231 }
232
233 if (options->EmitNoLoops)
234 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
235 else
236 options->MaxUnrollIterations = 255; /* SM3 limit */
237 options->LowerClipDistance = true;
238 }
239
240 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
241 * of inputs. It's always 2 colors + N generic inputs. */
242 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
243 PIPE_SHADER_CAP_MAX_INPUTS);
244 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
245
246 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
247 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
248
249 c->UniformBooleanTrue = ~0;
250
251 c->MaxTransformFeedbackBuffers =
252 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
253 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
254 c->MaxTransformFeedbackSeparateComponents =
255 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
256 c->MaxTransformFeedbackInterleavedComponents =
257 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
258
259 c->StripTextureBorder = GL_TRUE;
260
261 c->GLSLSkipStrictMaxUniformLimitCheck =
262 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
263
264 c->GLSLSkipStrictMaxVaryingLimitCheck =
265 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
266
267 if (can_ubo) {
268 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
269 st->ctx->Const.UniformBufferOffsetAlignment =
270 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
271 }
272 }
273
274
275 static GLboolean st_get_s3tc_override(void)
276 {
277 const char *override = _mesa_getenv("force_s3tc_enable");
278 if (override && !strcmp(override, "true"))
279 return GL_TRUE;
280 return GL_FALSE;
281 }
282
283 /**
284 * Given a member \c x of struct gl_extensions, return offset of
285 * \c x in bytes.
286 */
287 #define o(x) offsetof(struct gl_extensions, x)
288
289
290 struct st_extension_cap_mapping {
291 int extension_offset;
292 int cap;
293 };
294
295 struct st_extension_format_mapping {
296 int extension_offset[2];
297 enum pipe_format format[8];
298
299 /* If TRUE, at least one format must be supported for the extensions to be
300 * advertised. If FALSE, all the formats must be supported. */
301 GLboolean need_at_least_one;
302 };
303
304 /**
305 * Enable extensions if certain pipe formats are supported by the driver.
306 * What extensions will be enabled and what formats must be supported is
307 * described by the array of st_extension_format_mapping.
308 *
309 * target and bind_flags are passed to is_format_supported.
310 */
311 static void init_format_extensions(struct st_context *st,
312 const struct st_extension_format_mapping *mapping,
313 unsigned num_mappings,
314 enum pipe_texture_target target,
315 unsigned bind_flags)
316 {
317 struct pipe_screen *screen = st->pipe->screen;
318 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
319 unsigned i;
320 int j;
321 int num_formats = Elements(mapping->format);
322 int num_ext = Elements(mapping->extension_offset);
323
324 for (i = 0; i < num_mappings; i++) {
325 int num_supported = 0;
326
327 /* Examine each format in the list. */
328 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
329 if (screen->is_format_supported(screen, mapping[i].format[j],
330 target, 0, bind_flags)) {
331 num_supported++;
332 }
333 }
334
335 if (!num_supported ||
336 (!mapping[i].need_at_least_one && num_supported != j)) {
337 continue;
338 }
339
340 /* Enable all extensions in the list. */
341 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
342 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
343 }
344 }
345
346 /**
347 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
348 * which GL extensions are supported.
349 * Quite a few extensions are always supported because they are standard
350 * features or can be built on top of other gallium features.
351 * Some fine tuning may still be needed.
352 */
353 void st_init_extensions(struct st_context *st)
354 {
355 struct pipe_screen *screen = st->pipe->screen;
356 struct gl_context *ctx = st->ctx;
357 int i, glsl_feature_level;
358 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
359
360 static const struct st_extension_cap_mapping cap_mapping[] = {
361 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
362 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
363 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
364 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
365 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
366 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
367 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
368 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
369 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
370 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
371 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
372 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
373 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
374 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
375 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
376 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
377 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
378 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
379
380 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
381 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
382 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP },
383 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
384 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
385 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
386 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
387 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
388 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
389
390 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
391 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
392 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
393 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
394 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
395 /* GL_NV_point_sprite is not supported by gallium because we don't
396 * support the GL_POINT_SPRITE_R_MODE_NV option. */
397 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
398
399 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
400 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
401 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE }
402 };
403
404 /* Required: render target and sampler support */
405 static const struct st_extension_format_mapping rendertarget_mapping[] = {
406 { { o(ARB_texture_float) },
407 { PIPE_FORMAT_R32G32B32A32_FLOAT,
408 PIPE_FORMAT_R16G16B16A16_FLOAT } },
409
410 { { o(ARB_texture_rgb10_a2ui) },
411 { PIPE_FORMAT_B10G10R10A2_UINT } },
412
413 { { o(EXT_framebuffer_sRGB) },
414 { PIPE_FORMAT_A8B8G8R8_SRGB,
415 PIPE_FORMAT_B8G8R8A8_SRGB },
416 GL_TRUE }, /* at least one format must be supported */
417
418 { { o(EXT_packed_float) },
419 { PIPE_FORMAT_R11G11B10_FLOAT } },
420
421 { { o(EXT_texture_integer) },
422 { PIPE_FORMAT_R32G32B32A32_UINT,
423 PIPE_FORMAT_R32G32B32A32_SINT } },
424
425 { { o(ARB_texture_rg) },
426 { PIPE_FORMAT_R8_UNORM,
427 PIPE_FORMAT_R8G8_UNORM } },
428 };
429
430 /* Required: depth stencil and sampler support */
431 static const struct st_extension_format_mapping depthstencil_mapping[] = {
432 { { o(ARB_depth_buffer_float) },
433 { PIPE_FORMAT_Z32_FLOAT,
434 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
435
436 { { o(ARB_framebuffer_object),
437 o(EXT_packed_depth_stencil) },
438 { PIPE_FORMAT_S8_UINT_Z24_UNORM,
439 PIPE_FORMAT_Z24_UNORM_S8_UINT },
440 GL_TRUE }, /* at least one format must be supported */
441 };
442
443 /* Required: sampler support */
444 static const struct st_extension_format_mapping texture_mapping[] = {
445 { { o(ARB_texture_compression_rgtc) },
446 { PIPE_FORMAT_RGTC1_UNORM,
447 PIPE_FORMAT_RGTC1_SNORM,
448 PIPE_FORMAT_RGTC2_UNORM,
449 PIPE_FORMAT_RGTC2_SNORM } },
450
451 { { o(EXT_texture_compression_latc) },
452 { PIPE_FORMAT_LATC1_UNORM,
453 PIPE_FORMAT_LATC1_SNORM,
454 PIPE_FORMAT_LATC2_UNORM,
455 PIPE_FORMAT_LATC2_SNORM } },
456
457 { { o(EXT_texture_compression_s3tc),
458 o(ANGLE_texture_compression_dxt) },
459 { PIPE_FORMAT_DXT1_RGB,
460 PIPE_FORMAT_DXT1_RGBA,
461 PIPE_FORMAT_DXT3_RGBA,
462 PIPE_FORMAT_DXT5_RGBA } },
463
464 { { o(EXT_texture_shared_exponent) },
465 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
466
467 { { o(EXT_texture_snorm) },
468 { PIPE_FORMAT_R8G8B8A8_SNORM } },
469
470 { { o(EXT_texture_sRGB),
471 o(EXT_texture_sRGB_decode) },
472 { PIPE_FORMAT_A8B8G8R8_SRGB,
473 PIPE_FORMAT_B8G8R8A8_SRGB },
474 GL_TRUE }, /* at least one format must be supported */
475
476 { { o(ATI_texture_compression_3dc) },
477 { PIPE_FORMAT_LATC2_UNORM } },
478
479 { { o(MESA_ycbcr_texture) },
480 { PIPE_FORMAT_UYVY,
481 PIPE_FORMAT_YUYV },
482 GL_TRUE }, /* at least one format must be supported */
483
484 { { o(OES_compressed_ETC1_RGB8_texture) },
485 { PIPE_FORMAT_ETC1_RGB8 } },
486 };
487
488 /* Required: vertex fetch support. */
489 static const struct st_extension_format_mapping vertex_mapping[] = {
490 { { o(ARB_vertex_type_2_10_10_10_rev) },
491 { PIPE_FORMAT_R10G10B10A2_UNORM,
492 PIPE_FORMAT_B10G10R10A2_UNORM,
493 PIPE_FORMAT_R10G10B10A2_SNORM,
494 PIPE_FORMAT_B10G10R10A2_SNORM,
495 PIPE_FORMAT_R10G10B10A2_USCALED,
496 PIPE_FORMAT_B10G10R10A2_USCALED,
497 PIPE_FORMAT_R10G10B10A2_SSCALED,
498 PIPE_FORMAT_B10G10R10A2_SSCALED } },
499 };
500
501 static const struct st_extension_format_mapping tbo_rgb32[] = {
502 { {o(ARB_texture_buffer_object_rgb32) },
503 { PIPE_FORMAT_R32G32B32_FLOAT,
504 PIPE_FORMAT_R32G32B32_UINT,
505 PIPE_FORMAT_R32G32B32_SINT,
506 } },
507 };
508
509 /*
510 * Extensions that are supported by all Gallium drivers:
511 */
512 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
513 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
514 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
515 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
516 ctx->Extensions.ARB_fragment_program = GL_TRUE;
517 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
518 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
519 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
520 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
521 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
522 ctx->Extensions.ARB_shader_objects = GL_TRUE;
523 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
524 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
525 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
526 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
527 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
528 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
529 ctx->Extensions.ARB_texture_storage = GL_TRUE;
530 ctx->Extensions.ARB_vertex_program = GL_TRUE;
531 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
532
533 ctx->Extensions.EXT_blend_color = GL_TRUE;
534 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
535 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
536 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
537 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
538 ctx->Extensions.EXT_fog_coord = GL_TRUE;
539 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
540 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
541 ctx->Extensions.EXT_point_parameters = GL_TRUE;
542 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
543 ctx->Extensions.EXT_secondary_color = GL_TRUE;
544 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
545 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
546 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
547
548 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
549
550 ctx->Extensions.MESA_pack_invert = GL_TRUE;
551
552 ctx->Extensions.NV_blend_square = GL_TRUE;
553 ctx->Extensions.NV_fog_distance = GL_TRUE;
554 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
555 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
556
557 ctx->Extensions.OES_EGL_image = GL_TRUE;
558 if (ctx->API != API_OPENGL_COMPAT)
559 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
560 ctx->Extensions.OES_draw_texture = GL_TRUE;
561
562 /* Expose the extensions which directly correspond to gallium caps. */
563 for (i = 0; i < Elements(cap_mapping); i++) {
564 if (screen->get_param(screen, cap_mapping[i].cap)) {
565 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
566 }
567 }
568
569 /* Expose the extensions which directly correspond to gallium formats. */
570 init_format_extensions(st, rendertarget_mapping,
571 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
572 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
573 init_format_extensions(st, depthstencil_mapping,
574 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
575 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
576 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
577 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
578 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
579 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
580
581 /* Figure out GLSL support. */
582 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
583
584 if (glsl_feature_level >= 140) {
585 ctx->Const.GLSLVersion = 140;
586 } else if (glsl_feature_level >= 130) {
587 ctx->Const.GLSLVersion = 130;
588 } else {
589 ctx->Const.GLSLVersion = 120;
590 }
591
592 _mesa_override_glsl_version(st->ctx);
593
594 if (ctx->Const.GLSLVersion >= 130) {
595 ctx->Const.NativeIntegers = GL_TRUE;
596 ctx->Const.MaxClipPlanes = 8;
597
598 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
599 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
600 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
601 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
602 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
603 } else {
604 /* Optional integer support for GLSL 1.2. */
605 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
606 PIPE_SHADER_CAP_INTEGERS) &&
607 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
608 PIPE_SHADER_CAP_INTEGERS)) {
609 ctx->Const.NativeIntegers = GL_TRUE;
610 }
611 }
612
613 /* Below are the cases which cannot be moved into tables easily. */
614
615 if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) {
616 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
617 ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
618 }
619
620 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
621 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
622 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
623 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
624 #endif
625 }
626
627 ctx->Extensions.NV_primitive_restart = GL_TRUE;
628 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
629 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
630 }
631
632 /* ARB_color_buffer_float. */
633 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
634 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
635
636 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
637 st->clamp_vert_color_in_shader = TRUE;
638 }
639
640 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
641 st->clamp_frag_color_in_shader = TRUE;
642 }
643
644 /* For drivers which cannot do color clamping, it's better to just
645 * disable ARB_color_buffer_float in the core profile, because
646 * the clamping is deprecated there anyway. */
647 if (ctx->API == API_OPENGL_CORE &&
648 (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
649 st->clamp_vert_color_in_shader = GL_FALSE;
650 st->clamp_frag_color_in_shader = GL_FALSE;
651 ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
652 }
653 }
654
655 if (screen->fence_finish) {
656 ctx->Extensions.ARB_sync = GL_TRUE;
657 }
658
659 /* Maximum sample count. */
660 for (i = 16; i > 0; --i) {
661 enum pipe_format pformat = st_choose_format(st, GL_RGBA,
662 GL_NONE, GL_NONE,
663 PIPE_TEXTURE_2D, i,
664 PIPE_BIND_RENDER_TARGET, FALSE);
665 if (pformat != PIPE_FORMAT_NONE) {
666 ctx->Const.MaxSamples = i;
667 ctx->Const.MaxColorTextureSamples = i;
668 break;
669 }
670 }
671 for (i = ctx->Const.MaxSamples; i > 0; --i) {
672 enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
673 GL_NONE, GL_NONE,
674 PIPE_TEXTURE_2D, i,
675 PIPE_BIND_DEPTH_STENCIL, FALSE);
676 if (pformat != PIPE_FORMAT_NONE) {
677 ctx->Const.MaxDepthTextureSamples = i;
678 break;
679 }
680 }
681 for (i = ctx->Const.MaxSamples; i > 0; --i) {
682 enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
683 GL_NONE, GL_NONE,
684 PIPE_TEXTURE_2D, i,
685 PIPE_BIND_RENDER_TARGET, FALSE);
686 if (pformat != PIPE_FORMAT_NONE) {
687 ctx->Const.MaxIntegerSamples = i;
688 break;
689 }
690 }
691 if (ctx->Const.MaxSamples == 1) {
692 /* one sample doesn't really make sense */
693 ctx->Const.MaxSamples = 0;
694 }
695 else if (ctx->Const.MaxSamples >= 2) {
696 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
697 }
698
699 if (ctx->Const.MaxDualSourceDrawBuffers > 0)
700 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
701
702 st->has_time_elapsed =
703 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
704
705 if (st->has_time_elapsed ||
706 ctx->Extensions.ARB_timer_query) {
707 ctx->Extensions.EXT_timer_query = GL_TRUE;
708 }
709
710 if (ctx->Extensions.ARB_transform_feedback2 &&
711 ctx->Extensions.ARB_draw_instanced) {
712 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
713 }
714 if (st->options.force_glsl_extensions_warn)
715 ctx->Const.ForceGLSLExtensionsWarn = 1;
716
717 if (st->options.disable_glsl_line_continuations)
718 ctx->Const.DisableGLSLLineContinuations = 1;
719
720 ctx->Const.MinMapBufferAlignment =
721 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
722 if (ctx->Const.MinMapBufferAlignment >= 64) {
723 ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
724 }
725 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
726 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
727
728 ctx->Const.TextureBufferOffsetAlignment =
729 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
730
731 if (ctx->Const.TextureBufferOffsetAlignment)
732 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
733
734 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
735 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
736 }
737
738
739 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
740 * If the number of available texture indirections is very limited, then we
741 * prefer to disable varying packing rather than run the risk of varying
742 * packing preventing a shader from running.
743 */
744 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
745 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
746 /* We can't disable varying packing if transform feedback is available,
747 * because transform feedback code assumes a packed varying layout.
748 */
749 if (!ctx->Extensions.EXT_transform_feedback)
750 ctx->Const.DisableVaryingPacking = GL_TRUE;
751 }
752 }