1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright (c) 2008 VMware, Inc.
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:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
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.
27 **************************************************************************/
29 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/macros.h"
32 #include "main/mfeatures.h"
33 #include "main/version.h"
35 #include "pipe/p_context.h"
36 #include "pipe/p_defines.h"
37 #include "pipe/p_screen.h"
39 #include "st_context.h"
40 #include "st_extensions.h"
43 static int _min(int a, int b)
45 return (a < b) ? a : b;
48 static float _maxf(float a, float b)
50 return (a > b) ? a : b;
53 static int _clamp(int a, int min, int max)
65 * Query driver to get implementation limits.
66 * Note that we have to limit/clamp against Mesa's internal limits too.
68 void st_init_limits(struct st_context *st)
70 struct pipe_screen *screen = st->pipe->screen;
71 struct gl_constants *c = &st->ctx->Const;
73 boolean can_ubo = TRUE;
74 int max_const_buffers;
77 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
81 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
82 MAX_3D_TEXTURE_LEVELS);
84 c->MaxCubeTextureLevels
85 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
86 MAX_CUBE_TEXTURE_LEVELS);
89 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
91 c->MaxArrayTextureLayers
92 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
94 c->MaxTextureImageUnits
95 = _min(screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
96 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
97 MAX_TEXTURE_IMAGE_UNITS);
99 c->MaxVertexTextureImageUnits
100 = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
101 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
102 MAX_VERTEX_TEXTURE_IMAGE_UNITS);
104 c->MaxCombinedTextureImageUnits
105 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
106 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
108 c->MaxTextureCoordUnits
109 = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
111 c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
113 /* Define max viewport size and max renderbuffer size in terms of
114 * max texture size (note: max tex RECT size = max tex 2D size).
115 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
117 c->MaxViewportWidth =
118 c->MaxViewportHeight =
119 c->MaxRenderbufferSize = c->MaxTextureRectSize;
122 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
123 1, MAX_DRAW_BUFFERS);
125 c->MaxDualSourceDrawBuffers
126 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
127 0, MAX_DRAW_BUFFERS);
130 = _maxf(1.0f, screen->get_paramf(screen,
131 PIPE_CAPF_MAX_LINE_WIDTH));
133 = _maxf(1.0f, screen->get_paramf(screen,
134 PIPE_CAPF_MAX_LINE_WIDTH_AA));
137 = _maxf(1.0f, screen->get_paramf(screen,
138 PIPE_CAPF_MAX_POINT_WIDTH));
140 = _maxf(1.0f, screen->get_paramf(screen,
141 PIPE_CAPF_MAX_POINT_WIDTH_AA));
142 /* called after _mesa_create_context/_mesa_init_point, fix default user
143 * settable max point size up
145 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
146 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
147 * for non-aa sizes, but we can go down to 0.0 for aa points.
149 c->MinPointSize = 1.0f;
150 c->MinPointSizeAA = 0.0f;
152 c->MaxTextureMaxAnisotropy
153 = _maxf(2.0f, screen->get_paramf(screen,
154 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
157 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
160 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
161 1, MAX_DRAW_BUFFERS);
163 c->QuadsFollowProvokingVertexConvention = screen->get_param(
164 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
166 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
167 struct gl_shader_compiler_options *options =
168 &st->ctx->ShaderCompilerOptions[sh];
169 struct gl_program_constants *pc;
172 case PIPE_SHADER_FRAGMENT:
173 pc = &c->FragmentProgram;
175 case PIPE_SHADER_VERTEX:
176 pc = &c->VertexProgram;
178 case PIPE_SHADER_GEOMETRY:
179 pc = &c->GeometryProgram;
186 pc->MaxNativeInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
187 pc->MaxNativeAluInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
188 pc->MaxNativeTexInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
189 pc->MaxNativeTexIndirections = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
190 pc->MaxNativeAttribs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
191 pc->MaxNativeTemps = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
192 pc->MaxNativeAddressRegs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS);
193 pc->MaxNativeParameters = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
194 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
195 /* raise MaxParameters if native support is higher */
196 pc->MaxParameters = MAX2(pc->MaxParameters, pc->MaxNativeParameters);
198 /* Gallium doesn't really care about local vs. env parameters so use the
201 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
202 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
204 options->EmitNoNoise = TRUE;
206 /* TODO: make these more fine-grained if anyone needs it */
207 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
208 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
209 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
210 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
212 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
214 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
215 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
216 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
217 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
218 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
219 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
220 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
221 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
223 if (pc->MaxNativeInstructions) {
224 if (options->EmitNoIndirectUniform)
227 max_const_buffers = screen->get_shader_param(screen, sh,
228 PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
229 /* we need 13 buffers - 1 constant, 12 UBO */
230 if (max_const_buffers < 13)
234 if (options->EmitNoLoops)
235 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
237 options->MaxUnrollIterations = 255; /* SM3 limit */
238 options->LowerClipDistance = true;
241 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
242 * of inputs. It's always 2 colors + N generic inputs. */
243 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
244 PIPE_SHADER_CAP_MAX_INPUTS);
245 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
247 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
248 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
250 c->UniformBooleanTrue = ~0;
252 c->MaxTransformFeedbackBuffers =
253 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
254 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
255 c->MaxTransformFeedbackSeparateComponents =
256 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
257 c->MaxTransformFeedbackInterleavedComponents =
258 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
260 c->StripTextureBorder = GL_TRUE;
262 c->GLSLSkipStrictMaxUniformLimitCheck =
263 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
265 c->GLSLSkipStrictMaxVaryingLimitCheck =
266 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
269 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
273 static GLboolean st_get_s3tc_override(void)
275 const char *override = _mesa_getenv("force_s3tc_enable");
276 if (override && !strcmp(override, "true"))
282 * Given a member \c x of struct gl_extensions, return offset of
285 #define o(x) offsetof(struct gl_extensions, x)
288 struct st_extension_cap_mapping {
289 int extension_offset;
293 struct st_extension_format_mapping {
294 int extension_offset[2];
295 enum pipe_format format[8];
297 /* If TRUE, at least one format must be supported for the extensions to be
298 * advertised. If FALSE, all the formats must be supported. */
299 GLboolean need_at_least_one;
303 * Enable extensions if certain pipe formats are supported by the driver.
304 * What extensions will be enabled and what formats must be supported is
305 * described by the array of st_extension_format_mapping.
307 * target and bind_flags are passed to is_format_supported.
309 static void init_format_extensions(struct st_context *st,
310 const struct st_extension_format_mapping *mapping,
311 unsigned num_mappings,
312 enum pipe_texture_target target,
315 struct pipe_screen *screen = st->pipe->screen;
316 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
319 int num_formats = Elements(mapping->format);
320 int num_ext = Elements(mapping->extension_offset);
322 for (i = 0; i < num_mappings; i++) {
323 int num_supported = 0;
325 /* Examine each format in the list. */
326 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
327 if (screen->is_format_supported(screen, mapping[i].format[j],
328 target, 0, bind_flags)) {
333 if (!num_supported ||
334 (!mapping[i].need_at_least_one && num_supported != j)) {
338 /* Enable all extensions in the list. */
339 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
340 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
345 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
346 * which GL extensions are supported.
347 * Quite a few extensions are always supported because they are standard
348 * features or can be built on top of other gallium features.
349 * Some fine tuning may still be needed.
351 void st_init_extensions(struct st_context *st)
353 struct pipe_screen *screen = st->pipe->screen;
354 struct gl_context *ctx = st->ctx;
355 int i, glsl_feature_level;
356 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
358 static const struct st_extension_cap_mapping cap_mapping[] = {
359 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
360 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
361 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
362 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
363 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
364 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
365 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
366 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
367 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
368 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
369 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
370 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
371 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
372 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
373 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
374 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
375 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
377 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
378 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
379 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP },
380 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
381 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
382 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
383 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
384 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
385 { o(EXT_timer_query), PIPE_CAP_TIMER_QUERY },
386 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
388 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
389 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
390 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
391 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
392 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
393 /* GL_NV_point_sprite is not supported by gallium because we don't
394 * support the GL_POINT_SPRITE_R_MODE_NV option. */
395 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
397 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
398 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY }
401 /* Required: render target and sampler support */
402 static const struct st_extension_format_mapping rendertarget_mapping[] = {
403 { { o(ARB_texture_float) },
404 { PIPE_FORMAT_R32G32B32A32_FLOAT,
405 PIPE_FORMAT_R16G16B16A16_FLOAT } },
407 { { o(ARB_texture_rgb10_a2ui) },
408 { PIPE_FORMAT_B10G10R10A2_UINT } },
410 { { o(EXT_framebuffer_sRGB) },
411 { PIPE_FORMAT_A8B8G8R8_SRGB,
412 PIPE_FORMAT_B8G8R8A8_SRGB },
413 GL_TRUE }, /* at least one format must be supported */
415 { { o(EXT_packed_float) },
416 { PIPE_FORMAT_R11G11B10_FLOAT } },
418 { { o(EXT_texture_integer) },
419 { PIPE_FORMAT_R32G32B32A32_UINT,
420 PIPE_FORMAT_R32G32B32A32_SINT } },
423 /* Required: depth stencil and sampler support */
424 static const struct st_extension_format_mapping depthstencil_mapping[] = {
425 { { o(ARB_depth_buffer_float) },
426 { PIPE_FORMAT_Z32_FLOAT,
427 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
429 { { o(ARB_framebuffer_object),
430 o(EXT_packed_depth_stencil) },
431 { PIPE_FORMAT_S8_UINT_Z24_UNORM,
432 PIPE_FORMAT_Z24_UNORM_S8_UINT },
433 GL_TRUE }, /* at least one format must be supported */
436 /* Required: sampler support */
437 static const struct st_extension_format_mapping texture_mapping[] = {
438 { { o(ARB_texture_compression_rgtc) },
439 { PIPE_FORMAT_RGTC1_UNORM,
440 PIPE_FORMAT_RGTC1_SNORM,
441 PIPE_FORMAT_RGTC2_UNORM,
442 PIPE_FORMAT_RGTC2_SNORM } },
444 { { o(ARB_texture_rg) },
445 { PIPE_FORMAT_R8G8_UNORM } },
447 { { o(EXT_texture_compression_latc) },
448 { PIPE_FORMAT_LATC1_UNORM,
449 PIPE_FORMAT_LATC1_SNORM,
450 PIPE_FORMAT_LATC2_UNORM,
451 PIPE_FORMAT_LATC2_SNORM } },
453 { { o(EXT_texture_compression_s3tc),
455 { PIPE_FORMAT_DXT1_RGB,
456 PIPE_FORMAT_DXT1_RGBA,
457 PIPE_FORMAT_DXT3_RGBA,
458 PIPE_FORMAT_DXT5_RGBA } },
460 { { o(EXT_texture_shared_exponent) },
461 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
463 { { o(EXT_texture_snorm) },
464 { PIPE_FORMAT_R8G8B8A8_SNORM } },
466 { { o(EXT_texture_sRGB),
467 o(EXT_texture_sRGB_decode) },
468 { PIPE_FORMAT_A8B8G8R8_SRGB,
469 PIPE_FORMAT_B8G8R8A8_SRGB },
470 GL_TRUE }, /* at least one format must be supported */
472 { { o(ATI_texture_compression_3dc) },
473 { PIPE_FORMAT_LATC2_UNORM } },
475 { { o(MESA_ycbcr_texture) },
478 GL_TRUE }, /* at least one format must be supported */
480 { { o(OES_compressed_ETC1_RGB8_texture) },
481 { PIPE_FORMAT_ETC1_RGB8 } },
484 /* Required: vertex fetch support. */
485 static const struct st_extension_format_mapping vertex_mapping[] = {
486 { { o(ARB_vertex_type_2_10_10_10_rev) },
487 { PIPE_FORMAT_R10G10B10A2_UNORM,
488 PIPE_FORMAT_B10G10R10A2_UNORM,
489 PIPE_FORMAT_R10G10B10A2_SNORM,
490 PIPE_FORMAT_B10G10R10A2_SNORM,
491 PIPE_FORMAT_R10G10B10A2_USCALED,
492 PIPE_FORMAT_B10G10R10A2_USCALED,
493 PIPE_FORMAT_R10G10B10A2_SSCALED,
494 PIPE_FORMAT_B10G10R10A2_SSCALED } },
497 static const struct st_extension_format_mapping tbo_rgb32[] = {
498 { {o(ARB_texture_buffer_object_rgb32) },
499 { PIPE_FORMAT_R32G32B32_FLOAT,
500 PIPE_FORMAT_R32G32B32_UINT,
501 PIPE_FORMAT_R32G32B32_SINT,
506 * Extensions that are supported by all Gallium drivers:
508 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
509 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
510 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
511 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
512 ctx->Extensions.ARB_fragment_program = GL_TRUE;
513 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
514 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
515 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
516 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
517 ctx->Extensions.ARB_shader_objects = GL_TRUE;
518 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
519 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
520 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
521 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
522 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
523 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
524 ctx->Extensions.ARB_texture_storage = GL_TRUE;
525 ctx->Extensions.ARB_vertex_program = GL_TRUE;
526 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
528 ctx->Extensions.EXT_blend_color = GL_TRUE;
529 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
530 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
531 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
532 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
533 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
534 ctx->Extensions.EXT_fog_coord = GL_TRUE;
535 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
536 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
537 ctx->Extensions.EXT_point_parameters = GL_TRUE;
538 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
539 ctx->Extensions.EXT_secondary_color = GL_TRUE;
540 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
541 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
542 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
544 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
546 ctx->Extensions.MESA_pack_invert = GL_TRUE;
548 ctx->Extensions.NV_blend_square = GL_TRUE;
549 ctx->Extensions.NV_fog_distance = GL_TRUE;
550 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
551 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
553 ctx->Extensions.OES_EGL_image = GL_TRUE;
554 if (ctx->API != API_OPENGL_COMPAT)
555 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
556 ctx->Extensions.OES_draw_texture = GL_TRUE;
558 /* Expose the extensions which directly correspond to gallium caps. */
559 for (i = 0; i < Elements(cap_mapping); i++) {
560 if (screen->get_param(screen, cap_mapping[i].cap)) {
561 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
565 /* Expose the extensions which directly correspond to gallium formats. */
566 init_format_extensions(st, rendertarget_mapping,
567 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
568 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
569 init_format_extensions(st, depthstencil_mapping,
570 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
571 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
572 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
573 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
574 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
575 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
577 /* Figure out GLSL support. */
578 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
580 if (glsl_feature_level >= 140) {
581 ctx->Const.GLSLVersion = 140;
582 } else if (glsl_feature_level >= 130) {
583 ctx->Const.GLSLVersion = 130;
585 ctx->Const.GLSLVersion = 120;
588 _mesa_override_glsl_version(st->ctx);
590 if (ctx->Const.GLSLVersion >= 130) {
591 ctx->Const.NativeIntegers = GL_TRUE;
592 ctx->Const.MaxClipPlanes = 8;
594 /* Extensions that only depend on GLSL 1.3. */
595 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
596 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
598 /* Optional integer support for GLSL 1.2. */
599 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
600 PIPE_SHADER_CAP_INTEGERS) &&
601 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
602 PIPE_SHADER_CAP_INTEGERS)) {
603 ctx->Const.NativeIntegers = GL_TRUE;
607 /* Below are the cases which cannot be moved into tables easily. */
609 if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) {
610 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
611 ctx->Extensions.S3_s3tc = GL_FALSE;
614 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
615 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
616 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
617 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
621 ctx->Extensions.NV_primitive_restart = GL_TRUE;
622 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
623 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
626 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
627 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
629 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
630 st->clamp_vert_color_in_shader = TRUE;
633 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
634 st->clamp_frag_color_in_shader = TRUE;
638 if (screen->fence_finish) {
639 ctx->Extensions.ARB_sync = GL_TRUE;
642 /* Maximum sample count. */
643 for (i = 16; i > 0; --i) {
644 if (screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_UNORM,
646 PIPE_BIND_RENDER_TARGET)) {
647 ctx->Const.MaxSamples = i;
652 if (ctx->Const.MaxDualSourceDrawBuffers > 0)
653 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
655 if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY) &&
656 screen->get_param(screen, PIPE_CAP_QUERY_TIMESTAMP)) {
657 ctx->Extensions.ARB_timer_query = GL_TRUE;
660 if (ctx->Extensions.ARB_transform_feedback2 &&
661 ctx->Extensions.ARB_draw_instanced) {
662 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
664 if (st->options.force_glsl_extensions_warn)
665 ctx->Const.ForceGLSLExtensionsWarn = 1;
667 ctx->Const.MinMapBufferAlignment =
668 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
669 if (ctx->Const.MinMapBufferAlignment >= 64) {
670 ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
672 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
673 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
674 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
675 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
679 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
680 * If the number of available texture indirections is very limited, then we
681 * prefer to disable varying packing rather than run the risk of varying
682 * packing preventing a shader from running.
684 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
685 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
686 /* We can't disable varying packing if transform feedback is available,
687 * because transform feedback code assumes a packed varying layout.
689 if (!ctx->Extensions.EXT_transform_feedback)
690 ctx->Const.DisableVaryingPacking = GL_TRUE;