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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
43 /*
44 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
45 * avoid evaluating arguments (which are often function calls) more than once.
46 */
47
48 static unsigned _min(unsigned a, unsigned b)
49 {
50 return (a < b) ? a : b;
51 }
52
53 static float _maxf(float a, float b)
54 {
55 return (a > b) ? a : b;
56 }
57
58 static int _clamp(int a, int min, int max)
59 {
60 if (a < min)
61 return min;
62 else if (a > max)
63 return max;
64 else
65 return a;
66 }
67
68
69 /**
70 * Query driver to get implementation limits.
71 * Note that we have to limit/clamp against Mesa's internal limits too.
72 */
73 void st_init_limits(struct st_context *st)
74 {
75 struct pipe_screen *screen = st->pipe->screen;
76 struct gl_constants *c = &st->ctx->Const;
77 unsigned sh;
78 boolean can_ubo = TRUE;
79
80 c->MaxTextureLevels
81 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
82 MAX_TEXTURE_LEVELS);
83
84 c->Max3DTextureLevels
85 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
86 MAX_3D_TEXTURE_LEVELS);
87
88 c->MaxCubeTextureLevels
89 = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
90 MAX_CUBE_TEXTURE_LEVELS);
91
92 c->MaxTextureRectSize
93 = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
94
95 c->MaxArrayTextureLayers
96 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
97
98 /* Define max viewport size and max renderbuffer size in terms of
99 * max texture size (note: max tex RECT size = max tex 2D size).
100 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
101 */
102 c->MaxViewportWidth =
103 c->MaxViewportHeight =
104 c->MaxRenderbufferSize = c->MaxTextureRectSize;
105
106 c->MaxDrawBuffers = c->MaxColorAttachments =
107 _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
108 1, MAX_DRAW_BUFFERS);
109
110 c->MaxDualSourceDrawBuffers
111 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
112 0, MAX_DRAW_BUFFERS);
113
114 c->MaxLineWidth
115 = _maxf(1.0f, screen->get_paramf(screen,
116 PIPE_CAPF_MAX_LINE_WIDTH));
117 c->MaxLineWidthAA
118 = _maxf(1.0f, screen->get_paramf(screen,
119 PIPE_CAPF_MAX_LINE_WIDTH_AA));
120
121 c->MaxPointSize
122 = _maxf(1.0f, screen->get_paramf(screen,
123 PIPE_CAPF_MAX_POINT_WIDTH));
124 c->MaxPointSizeAA
125 = _maxf(1.0f, screen->get_paramf(screen,
126 PIPE_CAPF_MAX_POINT_WIDTH_AA));
127 /* called after _mesa_create_context/_mesa_init_point, fix default user
128 * settable max point size up
129 */
130 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
131 /* these are not queryable. Note that GL basically mandates a 1.0 minimum
132 * for non-aa sizes, but we can go down to 0.0 for aa points.
133 */
134 c->MinPointSize = 1.0f;
135 c->MinPointSizeAA = 0.0f;
136
137 c->MaxTextureMaxAnisotropy
138 = _maxf(2.0f, screen->get_paramf(screen,
139 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
140
141 c->MaxTextureLodBias
142 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
143
144 c->QuadsFollowProvokingVertexConvention = screen->get_param(
145 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
146
147 c->MaxUniformBlockSize =
148 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
149 PIPE_SHADER_CAP_MAX_CONSTS) * 16;
150 if (c->MaxUniformBlockSize < 16384) {
151 can_ubo = FALSE;
152 }
153
154 for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
155 struct gl_shader_compiler_options *options;
156 struct gl_program_constants *pc;
157
158 switch (sh) {
159 case PIPE_SHADER_FRAGMENT:
160 pc = &c->Program[MESA_SHADER_FRAGMENT];
161 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
162 break;
163 case PIPE_SHADER_VERTEX:
164 pc = &c->Program[MESA_SHADER_VERTEX];
165 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX];
166 break;
167 case PIPE_SHADER_GEOMETRY:
168 pc = &c->Program[MESA_SHADER_GEOMETRY];
169 options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
170 break;
171 default:
172 /* compute shader, etc. */
173 continue;
174 }
175
176 pc->MaxTextureImageUnits =
177 _min(screen->get_shader_param(screen, sh,
178 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
179 MAX_TEXTURE_IMAGE_UNITS);
180
181 pc->MaxInstructions = pc->MaxNativeInstructions =
182 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
183 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
184 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
185 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
186 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
187 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
188 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
189 pc->MaxAttribs = pc->MaxNativeAttribs =
190 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
191 pc->MaxTemps = pc->MaxNativeTemps =
192 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
193 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
194 _min(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS),
195 MAX_PROGRAM_ADDRESS_REGS);
196 pc->MaxParameters = pc->MaxNativeParameters =
197 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
198
199 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
200
201 pc->MaxUniformBlocks =
202 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
203 if (pc->MaxUniformBlocks)
204 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
205 pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
206
207 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
208 c->MaxUniformBlockSize / 4 *
209 pc->MaxUniformBlocks);
210
211 /* Gallium doesn't really care about local vs. env parameters so use the
212 * same limits.
213 */
214 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
215 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
216
217 options->EmitNoNoise = TRUE;
218
219 /* TODO: make these more fine-grained if anyone needs it */
220 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
221 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
222 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
223 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
224
225 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
226
227 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
228 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
229 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
230 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
231 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
232 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
233 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
234 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
235
236 if (pc->MaxNativeInstructions &&
237 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
238 can_ubo = FALSE;
239 }
240
241 if (options->EmitNoLoops)
242 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
243 else
244 options->MaxUnrollIterations = 255; /* SM3 limit */
245 options->LowerClipDistance = true;
246 }
247
248 c->MaxCombinedTextureImageUnits =
249 _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
250 c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
251 c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
252 MAX_COMBINED_TEXTURE_IMAGE_UNITS);
253
254 /* This depends on program constants. */
255 c->MaxTextureCoordUnits
256 = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
257
258 c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
259
260 c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
261
262 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
263 * of inputs. It's always 2 colors + N generic inputs. */
264 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
265 PIPE_SHADER_CAP_MAX_INPUTS);
266 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
267 c->Program[MESA_SHADER_FRAGMENT].MaxInputComponents = c->MaxVarying * 4;
268 c->Program[MESA_SHADER_VERTEX].MaxOutputComponents = c->MaxVarying * 4;
269 c->Program[MESA_SHADER_GEOMETRY].MaxInputComponents = c->MaxVarying * 4;
270 c->Program[MESA_SHADER_GEOMETRY].MaxOutputComponents = c->MaxVarying * 4;
271 c->MaxGeometryOutputVertices = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
272 c->MaxGeometryTotalOutputComponents = screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
273
274 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
275 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
276
277 c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
278 c->UniformBooleanTrue = ~0;
279
280 c->MaxTransformFeedbackBuffers =
281 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
282 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
283 c->MaxTransformFeedbackSeparateComponents =
284 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
285 c->MaxTransformFeedbackInterleavedComponents =
286 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
287
288 c->StripTextureBorder = GL_TRUE;
289
290 c->GLSLSkipStrictMaxUniformLimitCheck =
291 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
292
293 if (can_ubo) {
294 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
295 c->UniformBufferOffsetAlignment =
296 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
297 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
298 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
299 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
300 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
301 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
302 }
303 }
304
305
306 /**
307 * Given a member \c x of struct gl_extensions, return offset of
308 * \c x in bytes.
309 */
310 #define o(x) offsetof(struct gl_extensions, x)
311
312
313 struct st_extension_cap_mapping {
314 int extension_offset;
315 int cap;
316 };
317
318 struct st_extension_format_mapping {
319 int extension_offset[2];
320 enum pipe_format format[8];
321
322 /* If TRUE, at least one format must be supported for the extensions to be
323 * advertised. If FALSE, all the formats must be supported. */
324 GLboolean need_at_least_one;
325 };
326
327 /**
328 * Enable extensions if certain pipe formats are supported by the driver.
329 * What extensions will be enabled and what formats must be supported is
330 * described by the array of st_extension_format_mapping.
331 *
332 * target and bind_flags are passed to is_format_supported.
333 */
334 static void init_format_extensions(struct st_context *st,
335 const struct st_extension_format_mapping *mapping,
336 unsigned num_mappings,
337 enum pipe_texture_target target,
338 unsigned bind_flags)
339 {
340 struct pipe_screen *screen = st->pipe->screen;
341 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
342 unsigned i;
343 int j;
344 int num_formats = Elements(mapping->format);
345 int num_ext = Elements(mapping->extension_offset);
346
347 for (i = 0; i < num_mappings; i++) {
348 int num_supported = 0;
349
350 /* Examine each format in the list. */
351 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
352 if (screen->is_format_supported(screen, mapping[i].format[j],
353 target, 0, bind_flags)) {
354 num_supported++;
355 }
356 }
357
358 if (!num_supported ||
359 (!mapping[i].need_at_least_one && num_supported != j)) {
360 continue;
361 }
362
363 /* Enable all extensions in the list. */
364 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
365 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
366 }
367 }
368
369 /**
370 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
371 * which GL extensions are supported.
372 * Quite a few extensions are always supported because they are standard
373 * features or can be built on top of other gallium features.
374 * Some fine tuning may still be needed.
375 */
376 void st_init_extensions(struct st_context *st)
377 {
378 struct pipe_screen *screen = st->pipe->screen;
379 struct gl_context *ctx = st->ctx;
380 int i, glsl_feature_level;
381 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
382
383 static const struct st_extension_cap_mapping cap_mapping[] = {
384 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
385 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
386 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
387 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
388 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
389 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
390 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
391 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
392 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
393 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
394 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
395 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
396 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
397 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
398 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
399 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
400 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
401 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
402 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
403 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
404
405 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
406 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
407 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
408 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
409 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
410 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
411 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
412 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
413
414 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
415 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
416 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
417 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
418 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
419 /* GL_NV_point_sprite is not supported by gallium because we don't
420 * support the GL_POINT_SPRITE_R_MODE_NV option. */
421
422 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
423 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
424 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE }
425 };
426
427 /* Required: render target and sampler support */
428 static const struct st_extension_format_mapping rendertarget_mapping[] = {
429 { { o(ARB_texture_float) },
430 { PIPE_FORMAT_R32G32B32A32_FLOAT,
431 PIPE_FORMAT_R16G16B16A16_FLOAT } },
432
433 { { o(ARB_texture_rgb10_a2ui) },
434 { PIPE_FORMAT_R10G10B10A2_UINT,
435 PIPE_FORMAT_B10G10R10A2_UINT },
436 GL_TRUE }, /* at least one format must be supported */
437
438 { { o(EXT_framebuffer_sRGB) },
439 { PIPE_FORMAT_A8B8G8R8_SRGB,
440 PIPE_FORMAT_B8G8R8A8_SRGB },
441 GL_TRUE }, /* at least one format must be supported */
442
443 { { o(EXT_packed_float) },
444 { PIPE_FORMAT_R11G11B10_FLOAT } },
445
446 { { o(EXT_texture_integer) },
447 { PIPE_FORMAT_R32G32B32A32_UINT,
448 PIPE_FORMAT_R32G32B32A32_SINT } },
449
450 { { o(ARB_texture_rg) },
451 { PIPE_FORMAT_R8_UNORM,
452 PIPE_FORMAT_R8G8_UNORM } },
453 };
454
455 /* Required: depth stencil and sampler support */
456 static const struct st_extension_format_mapping depthstencil_mapping[] = {
457 { { o(ARB_depth_buffer_float) },
458 { PIPE_FORMAT_Z32_FLOAT,
459 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
460 };
461
462 /* Required: sampler support */
463 static const struct st_extension_format_mapping texture_mapping[] = {
464 { { o(ARB_texture_compression_rgtc) },
465 { PIPE_FORMAT_RGTC1_UNORM,
466 PIPE_FORMAT_RGTC1_SNORM,
467 PIPE_FORMAT_RGTC2_UNORM,
468 PIPE_FORMAT_RGTC2_SNORM } },
469
470 { { o(EXT_texture_compression_latc) },
471 { PIPE_FORMAT_LATC1_UNORM,
472 PIPE_FORMAT_LATC1_SNORM,
473 PIPE_FORMAT_LATC2_UNORM,
474 PIPE_FORMAT_LATC2_SNORM } },
475
476 { { o(EXT_texture_compression_s3tc),
477 o(ANGLE_texture_compression_dxt) },
478 { PIPE_FORMAT_DXT1_RGB,
479 PIPE_FORMAT_DXT1_RGBA,
480 PIPE_FORMAT_DXT3_RGBA,
481 PIPE_FORMAT_DXT5_RGBA } },
482
483 { { o(EXT_texture_shared_exponent) },
484 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
485
486 { { o(EXT_texture_snorm) },
487 { PIPE_FORMAT_R8G8B8A8_SNORM } },
488
489 { { o(EXT_texture_sRGB),
490 o(EXT_texture_sRGB_decode) },
491 { PIPE_FORMAT_A8B8G8R8_SRGB,
492 PIPE_FORMAT_B8G8R8A8_SRGB },
493 GL_TRUE }, /* at least one format must be supported */
494
495 { { o(ATI_texture_compression_3dc) },
496 { PIPE_FORMAT_LATC2_UNORM } },
497
498 { { o(MESA_ycbcr_texture) },
499 { PIPE_FORMAT_UYVY,
500 PIPE_FORMAT_YUYV },
501 GL_TRUE }, /* at least one format must be supported */
502
503 { { o(OES_compressed_ETC1_RGB8_texture) },
504 { PIPE_FORMAT_ETC1_RGB8 } },
505 };
506
507 /* Required: vertex fetch support. */
508 static const struct st_extension_format_mapping vertex_mapping[] = {
509 { { o(ARB_vertex_type_2_10_10_10_rev) },
510 { PIPE_FORMAT_R10G10B10A2_UNORM,
511 PIPE_FORMAT_B10G10R10A2_UNORM,
512 PIPE_FORMAT_R10G10B10A2_SNORM,
513 PIPE_FORMAT_B10G10R10A2_SNORM,
514 PIPE_FORMAT_R10G10B10A2_USCALED,
515 PIPE_FORMAT_B10G10R10A2_USCALED,
516 PIPE_FORMAT_R10G10B10A2_SSCALED,
517 PIPE_FORMAT_B10G10R10A2_SSCALED } },
518 { { o(ARB_vertex_type_10f_11f_11f_rev) },
519 { PIPE_FORMAT_R11G11B10_FLOAT } },
520 };
521
522 static const struct st_extension_format_mapping tbo_rgb32[] = {
523 { {o(ARB_texture_buffer_object_rgb32) },
524 { PIPE_FORMAT_R32G32B32_FLOAT,
525 PIPE_FORMAT_R32G32B32_UINT,
526 PIPE_FORMAT_R32G32B32_SINT,
527 } },
528 };
529
530 /*
531 * Extensions that are supported by all Gallium drivers:
532 */
533 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
534 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
535 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
536 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
537 ctx->Extensions.ARB_fragment_program = GL_TRUE;
538 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
539 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
540 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
541 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
542 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
543 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
544 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
545 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
546 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
547 ctx->Extensions.ARB_vertex_program = GL_TRUE;
548 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
549
550 ctx->Extensions.EXT_blend_color = GL_TRUE;
551 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
552 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
553 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
554 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
555 ctx->Extensions.EXT_point_parameters = GL_TRUE;
556 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
557
558 /* IMPORTANT:
559 * Don't enable EXT_separate_shader_objects. It disallows a certain
560 * optimization in the GLSL compiler and therefore is considered
561 * harmful.
562 */
563 ctx->Extensions.EXT_separate_shader_objects = GL_FALSE;
564
565 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
566 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
567
568 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
569
570 ctx->Extensions.MESA_pack_invert = GL_TRUE;
571
572 ctx->Extensions.NV_fog_distance = GL_TRUE;
573 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
574 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
575 ctx->Extensions.NV_vdpau_interop = GL_TRUE;
576
577 ctx->Extensions.OES_EGL_image = GL_TRUE;
578 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
579 ctx->Extensions.OES_draw_texture = GL_TRUE;
580
581 /* Expose the extensions which directly correspond to gallium caps. */
582 for (i = 0; i < Elements(cap_mapping); i++) {
583 if (screen->get_param(screen, cap_mapping[i].cap)) {
584 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
585 }
586 }
587
588 /* Expose the extensions which directly correspond to gallium formats. */
589 init_format_extensions(st, rendertarget_mapping,
590 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
591 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
592 init_format_extensions(st, depthstencil_mapping,
593 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
594 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
595 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
596 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
597 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
598 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
599
600 /* Figure out GLSL support. */
601 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
602
603 ctx->Const.GLSLVersion = glsl_feature_level;
604 if (glsl_feature_level >= 330)
605 ctx->Const.GLSLVersion = 330;
606
607 _mesa_override_glsl_version(st->ctx);
608
609 if (st->options.force_glsl_version > 0 &&
610 st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
611 ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
612 }
613
614 /* This extension needs full OpenGL 3.2, but we don't know if that's
615 * supported at this point. Only check the GLSL version. */
616 if (ctx->Const.GLSLVersion >= 150 &&
617 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
618 ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
619 }
620
621 if (ctx->Const.GLSLVersion >= 130) {
622 ctx->Const.NativeIntegers = GL_TRUE;
623 ctx->Const.MaxClipPlanes = 8;
624
625 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
626 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
627 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
628 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
629 ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
630
631 if (!st->options.disable_shader_bit_encoding) {
632 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
633 }
634 } else {
635 /* Optional integer support for GLSL 1.2. */
636 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
637 PIPE_SHADER_CAP_INTEGERS) &&
638 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
639 PIPE_SHADER_CAP_INTEGERS)) {
640 ctx->Const.NativeIntegers = GL_TRUE;
641 }
642 }
643
644 /* Below are the cases which cannot be moved into tables easily. */
645
646 if (!ctx->Mesa_DXTn && !st->options.force_s3tc_enable) {
647 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
648 ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
649 }
650
651 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
652 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
653 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
654 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
655 #endif
656 }
657
658 ctx->Extensions.NV_primitive_restart = GL_TRUE;
659 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
660 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
661 }
662
663 /* ARB_color_buffer_float. */
664 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
665 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
666
667 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
668 st->clamp_vert_color_in_shader = TRUE;
669 }
670
671 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
672 st->clamp_frag_color_in_shader = TRUE;
673 }
674
675 /* For drivers which cannot do color clamping, it's better to just
676 * disable ARB_color_buffer_float in the core profile, because
677 * the clamping is deprecated there anyway. */
678 if (ctx->API == API_OPENGL_CORE &&
679 (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
680 st->clamp_vert_color_in_shader = GL_FALSE;
681 st->clamp_frag_color_in_shader = GL_FALSE;
682 ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
683 }
684 }
685
686 if (screen->fence_finish) {
687 ctx->Extensions.ARB_sync = GL_TRUE;
688 }
689
690 /* Maximum sample count. */
691 for (i = 16; i > 0; --i) {
692 enum pipe_format pformat = st_choose_format(st, GL_RGBA,
693 GL_NONE, GL_NONE,
694 PIPE_TEXTURE_2D, i,
695 PIPE_BIND_RENDER_TARGET, FALSE);
696 if (pformat != PIPE_FORMAT_NONE) {
697 ctx->Const.MaxSamples = i;
698 ctx->Const.MaxColorTextureSamples = i;
699 break;
700 }
701 }
702 for (i = ctx->Const.MaxSamples; i > 0; --i) {
703 enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
704 GL_NONE, GL_NONE,
705 PIPE_TEXTURE_2D, i,
706 PIPE_BIND_DEPTH_STENCIL, FALSE);
707 if (pformat != PIPE_FORMAT_NONE) {
708 ctx->Const.MaxDepthTextureSamples = i;
709 break;
710 }
711 }
712 for (i = ctx->Const.MaxSamples; i > 0; --i) {
713 enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
714 GL_NONE, GL_NONE,
715 PIPE_TEXTURE_2D, i,
716 PIPE_BIND_RENDER_TARGET, FALSE);
717 if (pformat != PIPE_FORMAT_NONE) {
718 ctx->Const.MaxIntegerSamples = i;
719 break;
720 }
721 }
722 if (ctx->Const.MaxSamples == 1) {
723 /* one sample doesn't really make sense */
724 ctx->Const.MaxSamples = 0;
725 }
726 else if (ctx->Const.MaxSamples >= 2) {
727 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
728 ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
729 }
730
731 if (ctx->Const.MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
732 ctx->Const.FakeSWMSAA = GL_TRUE;
733 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
734 ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
735 ctx->Extensions.ARB_texture_multisample = GL_TRUE;
736 }
737
738 if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
739 !st->options.disable_blend_func_extended)
740 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
741
742 st->has_time_elapsed =
743 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
744
745 if (st->has_time_elapsed ||
746 ctx->Extensions.ARB_timer_query) {
747 ctx->Extensions.EXT_timer_query = GL_TRUE;
748 }
749
750 if (ctx->Extensions.ARB_transform_feedback2 &&
751 ctx->Extensions.ARB_draw_instanced) {
752 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
753 }
754 if (st->options.force_glsl_extensions_warn)
755 ctx->Const.ForceGLSLExtensionsWarn = 1;
756
757 if (st->options.disable_glsl_line_continuations)
758 ctx->Const.DisableGLSLLineContinuations = 1;
759
760 ctx->Const.MinMapBufferAlignment =
761 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
762
763 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
764 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
765
766 ctx->Const.MaxTextureBufferSize =
767 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
768 (1u << 31) - 1);
769 ctx->Const.TextureBufferOffsetAlignment =
770 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
771
772 if (ctx->Const.TextureBufferOffsetAlignment)
773 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
774
775 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
776 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
777 }
778
779 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
780 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
781 }
782
783 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
784 * If the number of available texture indirections is very limited, then we
785 * prefer to disable varying packing rather than run the risk of varying
786 * packing preventing a shader from running.
787 */
788 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
789 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
790 /* We can't disable varying packing if transform feedback is available,
791 * because transform feedback code assumes a packed varying layout.
792 */
793 if (!ctx->Extensions.EXT_transform_feedback)
794 ctx->Const.DisableVaryingPacking = GL_TRUE;
795 }
796
797 if (ctx->API == API_OPENGL_CORE) {
798 ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
799 if (ctx->Const.MaxViewports >= 16) {
800 ctx->Const.ViewportBounds.Min = -16384.0;
801 ctx->Const.ViewportBounds.Max = 16384.0;
802 ctx->Extensions.ARB_viewport_array = GL_TRUE;
803 }
804 }
805 if (ctx->Const.MaxProgramTextureGatherComponents > 0)
806 ctx->Extensions.ARB_texture_gather = GL_TRUE;
807 }