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/mfeatures.h"
33 #include "main/version.h"
34
35 #include "pipe/p_context.h"
36 #include "pipe/p_defines.h"
37 #include "pipe/p_screen.h"
38
39 #include "st_context.h"
40 #include "st_extensions.h"
41
42
_min(int a,int b)43 static int _min(int a, int b)
44 {
45 return (a < b) ? a : b;
46 }
47
_maxf(float a,float b)48 static float _maxf(float a, float b)
49 {
50 return (a > b) ? a : b;
51 }
52
_clamp(int a,int min,int max)53 static int _clamp(int a, int min, int max)
54 {
55 if (a < min)
56 return min;
57 else if (a > max)
58 return max;
59 else
60 return a;
61 }
62
63
64 /**
65 * Query driver to get implementation limits.
66 * Note that we have to limit/clamp against Mesa's internal limits too.
67 */
st_init_limits(struct st_context * st)68 void st_init_limits(struct st_context *st)
69 {
70 struct pipe_screen *screen = st->pipe->screen;
71 struct gl_constants *c = &st->ctx->Const;
72 gl_shader_type sh;
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->MaxTextureImageUnits
93 = _min(screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
94 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
95 MAX_TEXTURE_IMAGE_UNITS);
96
97 c->MaxVertexTextureImageUnits
98 = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
99 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
100 MAX_VERTEX_TEXTURE_IMAGE_UNITS);
101
102 c->MaxCombinedTextureImageUnits
103 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
104 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
105
106 c->MaxTextureCoordUnits
107 = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
108
109 c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits);
110
111 /* Define max viewport size and max renderbuffer size in terms of
112 * max texture size (note: max tex RECT size = max tex 2D size).
113 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
114 */
115 c->MaxViewportWidth =
116 c->MaxViewportHeight =
117 c->MaxRenderbufferSize = c->MaxTextureRectSize;
118
119 c->MaxDrawBuffers
120 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
121 1, MAX_DRAW_BUFFERS);
122
123 c->MaxDualSourceDrawBuffers
124 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
125 0, MAX_DRAW_BUFFERS);
126
127 c->MaxLineWidth
128 = _maxf(1.0f, screen->get_paramf(screen,
129 PIPE_CAPF_MAX_LINE_WIDTH));
130 c->MaxLineWidthAA
131 = _maxf(1.0f, screen->get_paramf(screen,
132 PIPE_CAPF_MAX_LINE_WIDTH_AA));
133
134 c->MaxPointSize
135 = _maxf(1.0f, screen->get_paramf(screen,
136 PIPE_CAPF_MAX_POINT_WIDTH));
137 c->MaxPointSizeAA
138 = _maxf(1.0f, screen->get_paramf(screen,
139 PIPE_CAPF_MAX_POINT_WIDTH_AA));
140 /* called after _mesa_create_context/_mesa_init_point, fix default user
141 * settable max point size up
142 */
143 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
144 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
145 * for non-aa sizes, but we can go down to 0.0 for aa points.
146 */
147 c->MinPointSize = 1.0f;
148 c->MinPointSizeAA = 0.0f;
149
150 c->MaxTextureMaxAnisotropy
151 = _maxf(2.0f, screen->get_paramf(screen,
152 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
153
154 c->MaxTextureLodBias
155 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
156
157 c->MaxDrawBuffers
158 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
159 1, MAX_DRAW_BUFFERS);
160
161 c->QuadsFollowProvokingVertexConvention = screen->get_param(
162 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
163
164 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
165 struct gl_shader_compiler_options *options =
166 &st->ctx->ShaderCompilerOptions[sh];
167 struct gl_program_constants *pc;
168
169 switch (sh) {
170 case PIPE_SHADER_FRAGMENT:
171 pc = &c->FragmentProgram;
172 break;
173 case PIPE_SHADER_VERTEX:
174 pc = &c->VertexProgram;
175 break;
176 case PIPE_SHADER_GEOMETRY:
177 pc = &c->GeometryProgram;
178 break;
179 default:
180 assert(0);
181 continue;
182 }
183
184 pc->MaxNativeInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
185 pc->MaxNativeAluInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
186 pc->MaxNativeTexInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
187 pc->MaxNativeTexIndirections = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
188 pc->MaxNativeAttribs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
189 pc->MaxNativeTemps = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
190 pc->MaxNativeAddressRegs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS);
191 pc->MaxNativeParameters = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
192 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
193 /* raise MaxParameters if native support is higher */
194 pc->MaxParameters = MAX2(pc->MaxParameters, pc->MaxNativeParameters);
195
196 /* Gallium doesn't really care about local vs. env parameters so use the
197 * same limits.
198 */
199 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
200 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
201
202 options->EmitNoNoise = TRUE;
203
204 /* TODO: make these more fine-grained if anyone needs it */
205 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
206 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
207 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
208 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
209
210 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
211
212 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
213 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
214 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
215 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
216 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
217 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
218 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
219 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
220
221 if (options->EmitNoLoops)
222 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
223 else
224 options->MaxUnrollIterations = 255; /* SM3 limit */
225 options->LowerClipDistance = true;
226 }
227
228 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
229 * of inputs. It's always 2 colors + N generic inputs. */
230 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
231 PIPE_SHADER_CAP_MAX_INPUTS);
232 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
233
234 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
235 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
236
237 c->UniformBooleanTrue = ~0;
238
239 c->MaxTransformFeedbackBuffers =
240 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
241 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
242 c->MaxTransformFeedbackSeparateComponents =
243 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
244 c->MaxTransformFeedbackInterleavedComponents =
245 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
246
247 c->StripTextureBorder = GL_TRUE;
248
249 c->GLSLSkipStrictMaxUniformLimitCheck =
250 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
251
252 c->GLSLSkipStrictMaxVaryingLimitCheck =
253 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
254 }
255
256
st_get_s3tc_override(void)257 static GLboolean st_get_s3tc_override(void)
258 {
259 const char *override = _mesa_getenv("force_s3tc_enable");
260 if (override && !strcmp(override, "true"))
261 return GL_TRUE;
262 return GL_FALSE;
263 }
264
265 /**
266 * Given a member \c x of struct gl_extensions, return offset of
267 * \c x in bytes.
268 */
269 #define o(x) offsetof(struct gl_extensions, x)
270
271
272 struct st_extension_cap_mapping {
273 int extension_offset;
274 int cap;
275 };
276
277 struct st_extension_format_mapping {
278 int extension_offset[2];
279 enum pipe_format format[8];
280
281 /* If TRUE, at least one format must be supported for the extensions to be
282 * advertised. If FALSE, all the formats must be supported. */
283 GLboolean need_at_least_one;
284 };
285
286 /**
287 * Enable extensions if certain pipe formats are supported by the driver.
288 * What extensions will be enabled and what formats must be supported is
289 * described by the array of st_extension_format_mapping.
290 *
291 * target and bind_flags are passed to is_format_supported.
292 */
init_format_extensions(struct st_context * st,const struct st_extension_format_mapping * mapping,unsigned num_mappings,enum pipe_texture_target target,unsigned bind_flags)293 static void init_format_extensions(struct st_context *st,
294 const struct st_extension_format_mapping *mapping,
295 unsigned num_mappings,
296 enum pipe_texture_target target,
297 unsigned bind_flags)
298 {
299 struct pipe_screen *screen = st->pipe->screen;
300 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
301 int i, j;
302 int num_formats = Elements(mapping->format);
303 int num_ext = Elements(mapping->extension_offset);
304
305 for (i = 0; i < num_mappings; i++) {
306 int num_supported = 0;
307
308 /* Examine each format in the list. */
309 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
310 if (screen->is_format_supported(screen, mapping[i].format[j],
311 target, 0, bind_flags)) {
312 num_supported++;
313 }
314 }
315
316 if (!num_supported ||
317 (!mapping[i].need_at_least_one && num_supported != j)) {
318 continue;
319 }
320
321 /* Enable all extensions in the list. */
322 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
323 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
324 }
325 }
326
327 /**
328 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
329 * which GL extensions are supported.
330 * Quite a few extensions are always supported because they are standard
331 * features or can be built on top of other gallium features.
332 * Some fine tuning may still be needed.
333 */
st_init_extensions(struct st_context * st)334 void st_init_extensions(struct st_context *st)
335 {
336 struct pipe_screen *screen = st->pipe->screen;
337 struct gl_context *ctx = st->ctx;
338 int i, glsl_feature_level;
339 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
340
341 static const struct st_extension_cap_mapping cap_mapping[] = {
342 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
343 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
344 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
345 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
346 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
347 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
348 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
349 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
350 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
351 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
352 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
353 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
354 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
355 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
356 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
357 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
358 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
359
360 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
361 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
362 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP },
363 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
364 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
365 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
366 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
367 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
368 { o(EXT_timer_query), PIPE_CAP_TIMER_QUERY },
369 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
370
371 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
372 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
373 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
374 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
375 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
376 /* GL_NV_point_sprite is not supported by gallium because we don't
377 * support the GL_POINT_SPRITE_R_MODE_NV option. */
378 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
379 };
380
381 /* Required: render target and sampler support */
382 static const struct st_extension_format_mapping rendertarget_mapping[] = {
383 { { o(ARB_texture_float) },
384 { PIPE_FORMAT_R32G32B32A32_FLOAT,
385 PIPE_FORMAT_R16G16B16A16_FLOAT } },
386
387 { { o(ARB_texture_rgb10_a2ui) },
388 { PIPE_FORMAT_B10G10R10A2_UINT } },
389
390 { { o(EXT_framebuffer_sRGB) },
391 { PIPE_FORMAT_A8B8G8R8_SRGB,
392 PIPE_FORMAT_B8G8R8A8_SRGB },
393 GL_TRUE }, /* at least one format must be supported */
394
395 { { o(EXT_packed_float) },
396 { PIPE_FORMAT_R11G11B10_FLOAT } },
397
398 { { o(EXT_texture_integer) },
399 { PIPE_FORMAT_R32G32B32A32_UINT,
400 PIPE_FORMAT_R32G32B32A32_SINT } },
401 };
402
403 /* Required: depth stencil and sampler support */
404 static const struct st_extension_format_mapping depthstencil_mapping[] = {
405 { { o(ARB_depth_buffer_float) },
406 { PIPE_FORMAT_Z32_FLOAT,
407 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
408
409 { { o(ARB_framebuffer_object),
410 o(EXT_packed_depth_stencil) },
411 { PIPE_FORMAT_S8_UINT_Z24_UNORM,
412 PIPE_FORMAT_Z24_UNORM_S8_UINT },
413 GL_TRUE }, /* at least one format must be supported */
414 };
415
416 /* Required: sampler support */
417 static const struct st_extension_format_mapping texture_mapping[] = {
418 { { o(ARB_texture_compression_rgtc) },
419 { PIPE_FORMAT_RGTC1_UNORM,
420 PIPE_FORMAT_RGTC1_SNORM,
421 PIPE_FORMAT_RGTC2_UNORM,
422 PIPE_FORMAT_RGTC2_SNORM } },
423
424 { { o(ARB_texture_rg) },
425 { PIPE_FORMAT_R8G8_UNORM } },
426
427 { { o(EXT_texture_compression_latc) },
428 { PIPE_FORMAT_LATC1_UNORM,
429 PIPE_FORMAT_LATC1_SNORM,
430 PIPE_FORMAT_LATC2_UNORM,
431 PIPE_FORMAT_LATC2_SNORM } },
432
433 { { o(EXT_texture_compression_s3tc),
434 o(S3_s3tc) },
435 { PIPE_FORMAT_DXT1_RGB,
436 PIPE_FORMAT_DXT1_RGBA,
437 PIPE_FORMAT_DXT3_RGBA,
438 PIPE_FORMAT_DXT5_RGBA } },
439
440 { { o(EXT_texture_shared_exponent) },
441 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
442
443 { { o(EXT_texture_snorm) },
444 { PIPE_FORMAT_R8G8B8A8_SNORM } },
445
446 { { o(EXT_texture_sRGB),
447 o(EXT_texture_sRGB_decode) },
448 { PIPE_FORMAT_A8B8G8R8_SRGB,
449 PIPE_FORMAT_B8G8R8A8_SRGB },
450 GL_TRUE }, /* at least one format must be supported */
451
452 { { o(ATI_texture_compression_3dc) },
453 { PIPE_FORMAT_LATC2_UNORM } },
454
455 { { o(MESA_ycbcr_texture) },
456 { PIPE_FORMAT_UYVY,
457 PIPE_FORMAT_YUYV },
458 GL_TRUE }, /* at least one format must be supported */
459
460 { { o(OES_compressed_ETC1_RGB8_texture) },
461 { PIPE_FORMAT_ETC1_RGB8 } },
462 };
463
464 /* Required: vertex fetch support. */
465 static const struct st_extension_format_mapping vertex_mapping[] = {
466 { { o(ARB_vertex_type_2_10_10_10_rev) },
467 { PIPE_FORMAT_R10G10B10A2_UNORM,
468 PIPE_FORMAT_B10G10R10A2_UNORM,
469 PIPE_FORMAT_R10G10B10A2_SNORM,
470 PIPE_FORMAT_B10G10R10A2_SNORM,
471 PIPE_FORMAT_R10G10B10A2_USCALED,
472 PIPE_FORMAT_B10G10R10A2_USCALED,
473 PIPE_FORMAT_R10G10B10A2_SSCALED,
474 PIPE_FORMAT_B10G10R10A2_SSCALED } },
475 };
476
477 /*
478 * Extensions that are supported by all Gallium drivers:
479 */
480 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
481 ctx->Extensions.ARB_copy_buffer = GL_TRUE;
482 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
483 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
484 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
485 ctx->Extensions.ARB_fragment_program = GL_TRUE;
486 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
487 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
488 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
489 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
490 ctx->Extensions.ARB_shader_objects = GL_TRUE;
491 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
492 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
493 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
494 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
495 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
496 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
497 ctx->Extensions.ARB_texture_storage = GL_TRUE;
498 ctx->Extensions.ARB_vertex_program = GL_TRUE;
499 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
500 ctx->Extensions.ARB_window_pos = GL_TRUE;
501
502 ctx->Extensions.EXT_blend_color = GL_TRUE;
503 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
504 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
505 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
506 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
507 ctx->Extensions.EXT_fog_coord = GL_TRUE;
508 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
509 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
510 ctx->Extensions.EXT_point_parameters = GL_TRUE;
511 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
512 ctx->Extensions.EXT_secondary_color = GL_TRUE;
513 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
514 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
515 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
516
517 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
518
519 ctx->Extensions.MESA_pack_invert = GL_TRUE;
520
521 ctx->Extensions.NV_blend_square = GL_TRUE;
522 ctx->Extensions.NV_fog_distance = GL_TRUE;
523 ctx->Extensions.NV_texgen_reflection = GL_TRUE;
524 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
525 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
526 #if 0
527 /* possibly could support the following two */
528 ctx->Extensions.NV_vertex_program = GL_TRUE;
529 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE;
530 #endif
531
532 #if FEATURE_OES_EGL_image
533 ctx->Extensions.OES_EGL_image = GL_TRUE;
534 if (ctx->API != API_OPENGL)
535 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
536 #endif
537 #if FEATURE_OES_draw_texture
538 ctx->Extensions.OES_draw_texture = GL_TRUE;
539 #endif
540
541 /* Expose the extensions which directly correspond to gallium caps. */
542 for (i = 0; i < Elements(cap_mapping); i++) {
543 if (screen->get_param(screen, cap_mapping[i].cap)) {
544 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
545 }
546 }
547
548 /* Expose the extensions which directly correspond to gallium formats. */
549 init_format_extensions(st, rendertarget_mapping,
550 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
551 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
552 init_format_extensions(st, depthstencil_mapping,
553 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
554 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
555 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
556 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
557 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
558 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
559
560 /* Figure out GLSL support. */
561 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
562
563 if (glsl_feature_level >= 130) {
564 ctx->Const.GLSLVersion = 130;
565 } else {
566 ctx->Const.GLSLVersion = 120;
567 }
568
569 _mesa_override_glsl_version(st->ctx);
570
571 if (ctx->Const.GLSLVersion >= 130) {
572 ctx->Const.NativeIntegers = GL_TRUE;
573 ctx->Const.MaxClipPlanes = 8;
574
575 /* Extensions that only depend on GLSL 1.3. */
576 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
577 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
578 } else {
579 /* Optional integer support for GLSL 1.2. */
580 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
581 PIPE_SHADER_CAP_INTEGERS) &&
582 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
583 PIPE_SHADER_CAP_INTEGERS)) {
584 ctx->Const.NativeIntegers = GL_TRUE;
585 }
586 }
587
588 /* Below are the cases which cannot be moved into tables easily. */
589
590 if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) {
591 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
592 ctx->Extensions.S3_s3tc = GL_FALSE;
593 }
594
595 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
596 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
597 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
598 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
599 #endif
600 }
601
602 ctx->Extensions.NV_primitive_restart = GL_TRUE;
603 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
604 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
605 }
606
607 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
608 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
609
610 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
611 st->clamp_vert_color_in_shader = TRUE;
612 }
613
614 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
615 st->clamp_frag_color_in_shader = TRUE;
616 }
617 }
618
619 if (screen->fence_finish) {
620 ctx->Extensions.ARB_sync = GL_TRUE;
621 }
622
623 /* Maximum sample count. */
624 for (i = 16; i > 0; --i) {
625 if (screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_UNORM,
626 PIPE_TEXTURE_2D, i,
627 PIPE_BIND_RENDER_TARGET)) {
628 ctx->Const.MaxSamples = i;
629 break;
630 }
631 }
632 if (ctx->Const.MaxSamples == 1) {
633 /* one sample doesn't really make sense */
634 ctx->Const.MaxSamples = 0;
635 }
636 else if (ctx->Const.MaxSamples >= 2) {
637 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
638 }
639
640 if (ctx->Const.MaxDualSourceDrawBuffers > 0)
641 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
642
643 if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY) &&
644 screen->get_param(screen, PIPE_CAP_QUERY_TIMESTAMP)) {
645 ctx->Extensions.ARB_timer_query = GL_TRUE;
646 }
647
648 if (ctx->Extensions.ARB_transform_feedback2 &&
649 ctx->Extensions.ARB_draw_instanced) {
650 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
651 }
652 if (st->options.force_glsl_extensions_warn)
653 ctx->Const.ForceGLSLExtensionsWarn = 1;
654 }
655