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[mesa.git] / src / mesa / state_tracker / st_extensions.c
1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * Copyright (c) 2008 VMware, Inc.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/macros.h"
32 #include "main/version.h"
33
34 #include "pipe/p_context.h"
35 #include "pipe/p_defines.h"
36 #include "pipe/p_screen.h"
37
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 unsigned 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 /* Define max viewport size and max renderbuffer size in terms of
93 * max texture size (note: max tex RECT size = max tex 2D size).
94 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
95 */
96 c->MaxViewportWidth =
97 c->MaxViewportHeight =
98 c->MaxRenderbufferSize = c->MaxTextureRectSize;
99
100 c->MaxDrawBuffers = c->MaxColorAttachments =
101 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
102 1, MAX_DRAW_BUFFERS);
103
104 c->MaxDualSourceDrawBuffers
105 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
106 0, MAX_DRAW_BUFFERS);
107
108 c->MaxLineWidth
109 = _maxf(1.0f, screen->get_paramf(screen,
110 PIPE_CAPF_MAX_LINE_WIDTH));
111 c->MaxLineWidthAA
112 = _maxf(1.0f, screen->get_paramf(screen,
113 PIPE_CAPF_MAX_LINE_WIDTH_AA));
114
115 c->MaxPointSize
116 = _maxf(1.0f, screen->get_paramf(screen,
117 PIPE_CAPF_MAX_POINT_WIDTH));
118 c->MaxPointSizeAA
119 = _maxf(1.0f, screen->get_paramf(screen,
120 PIPE_CAPF_MAX_POINT_WIDTH_AA));
121 /* called after _mesa_create_context/_mesa_init_point, fix default user
122 * settable max point size up
123 */
124 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
125 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
126 * for non-aa sizes, but we can go down to 0.0 for aa points.
127 */
128 c->MinPointSize = 1.0f;
129 c->MinPointSizeAA = 0.0f;
130
131 c->MaxTextureMaxAnisotropy
132 = _maxf(2.0f, screen->get_paramf(screen,
133 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
134
135 c->MaxTextureLodBias
136 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
137
138 c->QuadsFollowProvokingVertexConvention = screen->get_param(
139 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
140
141 c->MaxUniformBlockSize =
142 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
143 PIPE_SHADER_CAP_MAX_CONSTS) * 16;
144 if (c->MaxUniformBlockSize < 16384) {
145 can_ubo = FALSE;
146 }
147
148 for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
149 struct gl_shader_compiler_options *options;
150 struct gl_program_constants *pc;
151
152 switch (sh) {
153 case PIPE_SHADER_FRAGMENT:
154 pc = &c->Program[MESA_SHADER_FRAGMENT];
155 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
156 break;
157 case PIPE_SHADER_VERTEX:
158 pc = &c->Program[MESA_SHADER_VERTEX];
159 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX];
160 break;
161 case PIPE_SHADER_GEOMETRY:
162 pc = &c->Program[MESA_SHADER_GEOMETRY];
163 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
164 break;
165 default:
166 /* compute shader, etc. */
167 continue;
168 }
169
170 pc->MaxTextureImageUnits =
171 _min(screen->get_shader_param(screen, sh,
172 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
173 MAX_TEXTURE_IMAGE_UNITS);
174
175 pc->MaxInstructions = pc->MaxNativeInstructions =
176 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
177 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
178 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
179 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
180 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
181 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
182 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
183 pc->MaxAttribs = pc->MaxNativeAttribs =
184 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
185 pc->MaxTemps = pc->MaxNativeTemps =
186 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
187 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
188 _min(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS),
189 MAX_PROGRAM_ADDRESS_REGS);
190 pc->MaxParameters = pc->MaxNativeParameters =
191 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
192
193 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
194
195 pc->MaxUniformBlocks =
196 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
197 if (pc->MaxUniformBlocks)
198 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
199 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
200
201 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
202 c->MaxUniformBlockSize / 4 *
203 pc->MaxUniformBlocks);
204
205 /* Gallium doesn't really care about local vs. env parameters so use the
206 * same limits.
207 */
208 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
209 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
210
211 options->EmitNoNoise = TRUE;
212
213 /* TODO: make these more fine-grained if anyone needs it */
214 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
215 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
216 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
217 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
218
219 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
220
221 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
222 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
223 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
224 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
225 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
226 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
227 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
228 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
229
230 if (pc->MaxNativeInstructions &&
231 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
232 can_ubo = FALSE;
233 }
234
235 if (options->EmitNoLoops)
236 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
237 else
238 options->MaxUnrollIterations = 255; /* SM3 limit */
239 options->LowerClipDistance = true;
240 }
241
242 c->MaxCombinedTextureImageUnits =
243 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
244 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
245 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
246 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
247
248 /* This depends on program constants. */
249 c->MaxTextureCoordUnits
250 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
251
252 c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
253
254 c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
255
256 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
257 * of inputs. It's always 2 colors + N generic inputs. */
258 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
259 PIPE_SHADER_CAP_MAX_INPUTS);
260 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
261 c->Program[MESA_SHADER_FRAGMENT].MaxInputComponents = c->MaxVarying * 4;
262 c->Program[MESA_SHADER_VERTEX].MaxOutputComponents = c->MaxVarying * 4;
263 c->Program[MESA_SHADER_GEOMETRY].MaxInputComponents = c->MaxVarying * 4;
264 c->Program[MESA_SHADER_GEOMETRY].MaxOutputComponents = c->MaxVarying * 4;
265 c->MaxGeometryOutputVertices = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
266 c->MaxGeometryTotalOutputComponents = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
267
268 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
269 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
270
271 c->UniformBooleanTrue = ~0;
272
273 c->MaxTransformFeedbackBuffers =
274 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
275 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
276 c->MaxTransformFeedbackSeparateComponents =
277 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
278 c->MaxTransformFeedbackInterleavedComponents =
279 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
280
281 c->StripTextureBorder = GL_TRUE;
282
283 c->GLSLSkipStrictMaxUniformLimitCheck =
284 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
285
286 if (can_ubo) {
287 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
288 c->UniformBufferOffsetAlignment =
289 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
290 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
291 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
292 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
293 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
294 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
295 }
296 }
297
298
299 /**
300 * Given a member \c x of struct gl_extensions, return offset of
301 * \c x in bytes.
302 */
303 #define o(x) offsetof(struct gl_extensions, x)
304
305
306 struct st_extension_cap_mapping {
307 int extension_offset;
308 int cap;
309 };
310
311 struct st_extension_format_mapping {
312 int extension_offset[2];
313 enum pipe_format format[8];
314
315 /* If TRUE, at least one format must be supported for the extensions to be
316 * advertised. If FALSE, all the formats must be supported. */
317 GLboolean need_at_least_one;
318 };
319
320 /**
321 * Enable extensions if certain pipe formats are supported by the driver.
322 * What extensions will be enabled and what formats must be supported is
323 * described by the array of st_extension_format_mapping.
324 *
325 * target and bind_flags are passed to is_format_supported.
326 */
327 static void init_format_extensions(struct st_context *st,
328 const struct st_extension_format_mapping *mapping,
329 unsigned num_mappings,
330 enum pipe_texture_target target,
331 unsigned bind_flags)
332 {
333 struct pipe_screen *screen = st->pipe->screen;
334 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
335 unsigned i;
336 int j;
337 int num_formats = Elements(mapping->format);
338 int num_ext = Elements(mapping->extension_offset);
339
340 for (i = 0; i < num_mappings; i++) {
341 int num_supported = 0;
342
343 /* Examine each format in the list. */
344 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
345 if (screen->is_format_supported(screen, mapping[i].format[j],
346 target, 0, bind_flags)) {
347 num_supported++;
348 }
349 }
350
351 if (!num_supported ||
352 (!mapping[i].need_at_least_one && num_supported != j)) {
353 continue;
354 }
355
356 /* Enable all extensions in the list. */
357 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
358 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
359 }
360 }
361
362 /**
363 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
364 * which GL extensions are supported.
365 * Quite a few extensions are always supported because they are standard
366 * features or can be built on top of other gallium features.
367 * Some fine tuning may still be needed.
368 */
369 void st_init_extensions(struct st_context *st)
370 {
371 struct pipe_screen *screen = st->pipe->screen;
372 struct gl_context *ctx = st->ctx;
373 int i, glsl_feature_level;
374 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
375
376 static const struct st_extension_cap_mapping cap_mapping[] = {
377 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
378 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
379 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
380 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
381 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
382 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
383 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
384 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
385 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
386 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
387 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
388 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
389 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
390 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
391 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
392 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
393 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
394 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
395 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
396
397 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
398 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
399 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
400 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
401 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
402 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
403 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
404 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
405
406 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
407 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
408 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
409 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
410 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
411 /* GL_NV_point_sprite is not supported by gallium because we don't
412 * support the GL_POINT_SPRITE_R_MODE_NV option. */
413
414 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
415 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
416 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE }
417 };
418
419 /* Required: render target and sampler support */
420 static const struct st_extension_format_mapping rendertarget_mapping[] = {
421 { { o(ARB_texture_float) },
422 { PIPE_FORMAT_R32G32B32A32_FLOAT,
423 PIPE_FORMAT_R16G16B16A16_FLOAT } },
424
425 { { o(ARB_texture_rgb10_a2ui) },
426 { PIPE_FORMAT_R10G10B10A2_UINT,
427 PIPE_FORMAT_B10G10R10A2_UINT },
428 GL_TRUE }, /* at least one format must be supported */
429
430 { { o(EXT_framebuffer_sRGB) },
431 { PIPE_FORMAT_A8B8G8R8_SRGB,
432 PIPE_FORMAT_B8G8R8A8_SRGB },
433 GL_TRUE }, /* at least one format must be supported */
434
435 { { o(EXT_packed_float) },
436 { PIPE_FORMAT_R11G11B10_FLOAT } },
437
438 { { o(EXT_texture_integer) },
439 { PIPE_FORMAT_R32G32B32A32_UINT,
440 PIPE_FORMAT_R32G32B32A32_SINT } },
441
442 { { o(ARB_texture_rg) },
443 { PIPE_FORMAT_R8_UNORM,
444 PIPE_FORMAT_R8G8_UNORM } },
445 };
446
447 /* Required: depth stencil and sampler support */
448 static const struct st_extension_format_mapping depthstencil_mapping[] = {
449 { { o(ARB_depth_buffer_float) },
450 { PIPE_FORMAT_Z32_FLOAT,
451 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
452 };
453
454 /* Required: sampler support */
455 static const struct st_extension_format_mapping texture_mapping[] = {
456 { { o(ARB_texture_compression_rgtc) },
457 { PIPE_FORMAT_RGTC1_UNORM,
458 PIPE_FORMAT_RGTC1_SNORM,
459 PIPE_FORMAT_RGTC2_UNORM,
460 PIPE_FORMAT_RGTC2_SNORM } },
461
462 { { o(EXT_texture_compression_latc) },
463 { PIPE_FORMAT_LATC1_UNORM,
464 PIPE_FORMAT_LATC1_SNORM,
465 PIPE_FORMAT_LATC2_UNORM,
466 PIPE_FORMAT_LATC2_SNORM } },
467
468 { { o(EXT_texture_compression_s3tc),
469 o(ANGLE_texture_compression_dxt) },
470 { PIPE_FORMAT_DXT1_RGB,
471 PIPE_FORMAT_DXT1_RGBA,
472 PIPE_FORMAT_DXT3_RGBA,
473 PIPE_FORMAT_DXT5_RGBA } },
474
475 { { o(EXT_texture_shared_exponent) },
476 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
477
478 { { o(EXT_texture_snorm) },
479 { PIPE_FORMAT_R8G8B8A8_SNORM } },
480
481 { { o(EXT_texture_sRGB),
482 o(EXT_texture_sRGB_decode) },
483 { PIPE_FORMAT_A8B8G8R8_SRGB,
484 PIPE_FORMAT_B8G8R8A8_SRGB },
485 GL_TRUE }, /* at least one format must be supported */
486
487 { { o(ATI_texture_compression_3dc) },
488 { PIPE_FORMAT_LATC2_UNORM } },
489
490 { { o(MESA_ycbcr_texture) },
491 { PIPE_FORMAT_UYVY,
492 PIPE_FORMAT_YUYV },
493 GL_TRUE }, /* at least one format must be supported */
494
495 { { o(OES_compressed_ETC1_RGB8_texture) },
496 { PIPE_FORMAT_ETC1_RGB8 } },
497 };
498
499 /* Required: vertex fetch support. */
500 static const struct st_extension_format_mapping vertex_mapping[] = {
501 { { o(ARB_vertex_type_2_10_10_10_rev) },
502 { PIPE_FORMAT_R10G10B10A2_UNORM,
503 PIPE_FORMAT_B10G10R10A2_UNORM,
504 PIPE_FORMAT_R10G10B10A2_SNORM,
505 PIPE_FORMAT_B10G10R10A2_SNORM,
506 PIPE_FORMAT_R10G10B10A2_USCALED,
507 PIPE_FORMAT_B10G10R10A2_USCALED,
508 PIPE_FORMAT_R10G10B10A2_SSCALED,
509 PIPE_FORMAT_B10G10R10A2_SSCALED } },
510 { { o(ARB_vertex_type_10f_11f_11f_rev) },
511 { PIPE_FORMAT_R11G11B10_FLOAT } },
512 };
513
514 static const struct st_extension_format_mapping tbo_rgb32[] = {
515 { {o(ARB_texture_buffer_object_rgb32) },
516 { PIPE_FORMAT_R32G32B32_FLOAT,
517 PIPE_FORMAT_R32G32B32_UINT,
518 PIPE_FORMAT_R32G32B32_SINT,
519 } },
520 };
521
522 /*
523 * Extensions that are supported by all Gallium drivers:
524 */
525 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
526 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
527 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
528 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
529 ctx->Extensions.ARB_fragment_program = GL_TRUE;
530 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
531 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
532 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
533 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
534 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
535 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
536 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
537 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
538 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
539 ctx->Extensions.ARB_vertex_program = GL_TRUE;
540 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
541
542 ctx->Extensions.EXT_blend_color = GL_TRUE;
543 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
544 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
545 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
546 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
547 ctx->Extensions.EXT_point_parameters = GL_TRUE;
548 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
549
550 /* IMPORTANT:
551 * Don't enable EXT_separate_shader_objects. It disallows a certain
552 * optimization in the GLSL compiler and therefore is considered
553 * harmful.
554 */
555 ctx->Extensions.EXT_separate_shader_objects = GL_FALSE;
556
557 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
558 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
559
560 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
561
562 ctx->Extensions.MESA_pack_invert = GL_TRUE;
563
564 ctx->Extensions.NV_fog_distance = GL_TRUE;
565 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
566 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
567 ctx->Extensions.NV_vdpau_interop = GL_TRUE;
568
569 ctx->Extensions.OES_EGL_image = GL_TRUE;
570 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
571 ctx->Extensions.OES_draw_texture = GL_TRUE;
572
573 /* Expose the extensions which directly correspond to gallium caps. */
574 for (i = 0; i < Elements(cap_mapping); i++) {
575 if (screen->get_param(screen, cap_mapping[i].cap)) {
576 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
577 }
578 }
579
580 /* Expose the extensions which directly correspond to gallium formats. */
581 init_format_extensions(st, rendertarget_mapping,
582 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
583 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
584 init_format_extensions(st, depthstencil_mapping,
585 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
586 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
587 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
588 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
589 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
590 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
591
592 /* Figure out GLSL support. */
593 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
594
595 ctx->Const.GLSLVersion = glsl_feature_level;
596 if (glsl_feature_level >= 330)
597 ctx->Const.GLSLVersion = 330;
598
599 _mesa_override_glsl_version(st->ctx);
600
601 if (st->options.force_glsl_version > 0 &&
602 st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
603 ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
604 }
605
606 /* This extension needs full OpenGL 3.2, but we don't know if that's
607 * supported at this point. Only check the GLSL version. */
608 if (ctx->Const.GLSLVersion >= 150 &&
609 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
610 ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
611 }
612
613 if (ctx->Const.GLSLVersion >= 130) {
614 ctx->Const.NativeIntegers = GL_TRUE;
615 ctx->Const.MaxClipPlanes = 8;
616
617 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
618 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
619 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
620 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
621 ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
622
623 if (!st->options.disable_shader_bit_encoding) {
624 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
625 }
626 } else {
627 /* Optional integer support for GLSL 1.2. */
628 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
629 PIPE_SHADER_CAP_INTEGERS) &&
630 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
631 PIPE_SHADER_CAP_INTEGERS)) {
632 ctx->Const.NativeIntegers = GL_TRUE;
633 }
634 }
635
636 /* Below are the cases which cannot be moved into tables easily. */
637
638 if (!ctx->Mesa_DXTn && !st->options.force_s3tc_enable) {
639 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
640 ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
641 }
642
643 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
644 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
645 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
646 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
647 #endif
648 }
649
650 ctx->Extensions.NV_primitive_restart = GL_TRUE;
651 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
652 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
653 }
654
655 /* ARB_color_buffer_float. */
656 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
657 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
658
659 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
660 st->clamp_vert_color_in_shader = TRUE;
661 }
662
663 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
664 st->clamp_frag_color_in_shader = TRUE;
665 }
666
667 /* For drivers which cannot do color clamping, it's better to just
668 * disable ARB_color_buffer_float in the core profile, because
669 * the clamping is deprecated there anyway. */
670 if (ctx->API == API_OPENGL_CORE &&
671 (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
672 st->clamp_vert_color_in_shader = GL_FALSE;
673 st->clamp_frag_color_in_shader = GL_FALSE;
674 ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
675 }
676 }
677
678 if (screen->fence_finish) {
679 ctx->Extensions.ARB_sync = GL_TRUE;
680 }
681
682 /* Maximum sample count. */
683 for (i = 16; i > 0; --i) {
684 enum pipe_format pformat = st_choose_format(st, GL_RGBA,
685 GL_NONE, GL_NONE,
686 PIPE_TEXTURE_2D, i,
687 PIPE_BIND_RENDER_TARGET, FALSE);
688 if (pformat != PIPE_FORMAT_NONE) {
689 ctx->Const.MaxSamples = i;
690 ctx->Const.MaxColorTextureSamples = i;
691 break;
692 }
693 }
694 for (i = ctx->Const.MaxSamples; i > 0; --i) {
695 enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
696 GL_NONE, GL_NONE,
697 PIPE_TEXTURE_2D, i,
698 PIPE_BIND_DEPTH_STENCIL, FALSE);
699 if (pformat != PIPE_FORMAT_NONE) {
700 ctx->Const.MaxDepthTextureSamples = i;
701 break;
702 }
703 }
704 for (i = ctx->Const.MaxSamples; i > 0; --i) {
705 enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
706 GL_NONE, GL_NONE,
707 PIPE_TEXTURE_2D, i,
708 PIPE_BIND_RENDER_TARGET, FALSE);
709 if (pformat != PIPE_FORMAT_NONE) {
710 ctx->Const.MaxIntegerSamples = i;
711 break;
712 }
713 }
714 if (ctx->Const.MaxSamples == 1) {
715 /* one sample doesn't really make sense */
716 ctx->Const.MaxSamples = 0;
717 }
718 else if (ctx->Const.MaxSamples >= 2) {
719 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
720 ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
721 }
722
723 if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
724 !st->options.disable_blend_func_extended)
725 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
726
727 st->has_time_elapsed =
728 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
729
730 if (st->has_time_elapsed ||
731 ctx->Extensions.ARB_timer_query) {
732 ctx->Extensions.EXT_timer_query = GL_TRUE;
733 }
734
735 if (ctx->Extensions.ARB_transform_feedback2 &&
736 ctx->Extensions.ARB_draw_instanced) {
737 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
738 }
739 if (st->options.force_glsl_extensions_warn)
740 ctx->Const.ForceGLSLExtensionsWarn = 1;
741
742 if (st->options.disable_glsl_line_continuations)
743 ctx->Const.DisableGLSLLineContinuations = 1;
744
745 ctx->Const.MinMapBufferAlignment =
746 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
747
748 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
749 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
750
751 ctx->Const.MaxTextureBufferSize =
752 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
753 (1u << 31) - 1);
754 ctx->Const.TextureBufferOffsetAlignment =
755 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
756
757 if (ctx->Const.TextureBufferOffsetAlignment)
758 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
759
760 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
761 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
762 }
763
764 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
765 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
766 }
767
768 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
769 * If the number of available texture indirections is very limited, then we
770 * prefer to disable varying packing rather than run the risk of varying
771 * packing preventing a shader from running.
772 */
773 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
774 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
775 /* We can't disable varying packing if transform feedback is available,
776 * because transform feedback code assumes a packed varying layout.
777 */
778 if (!ctx->Extensions.EXT_transform_feedback)
779 ctx->Const.DisableVaryingPacking = GL_TRUE;
780 }
781
782 if (ctx->API == API_OPENGL_CORE) {
783 ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
784 if (ctx->Const.MaxViewports >= 16) {
785 ctx->Const.ViewportBounds.Min = -16384.0;
786 ctx->Const.ViewportBounds.Max = 16384.0;
787 ctx->Extensions.ARB_viewport_array = GL_TRUE;
788 }
789 }
790 }