st/mesa: initialize all program constants and UBO limits
[mesa.git] / src / mesa / state_tracker / st_extensions.c
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright (c) 2008 VMware, Inc.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
17 * of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 **************************************************************************/
28
29 #include "main/imports.h"
30 #include "main/context.h"
31 #include "main/macros.h"
32 #include "main/version.h"
33
34 #include "pipe/p_context.h"
35 #include "pipe/p_defines.h"
36 #include "pipe/p_screen.h"
37
38 #include "st_context.h"
39 #include "st_extensions.h"
40 #include "st_format.h"
41
42 static int _min(int a, int b)
43 {
44 return (a < b) ? a : b;
45 }
46
47 static float _maxf(float a, float b)
48 {
49 return (a > b) ? a : b;
50 }
51
52 static int _clamp(int a, int min, int max)
53 {
54 if (a < min)
55 return min;
56 else if (a > max)
57 return max;
58 else
59 return a;
60 }
61
62
63 /**
64 * Query driver to get implementation limits.
65 * Note that we have to limit/clamp against Mesa's internal limits too.
66 */
67 void st_init_limits(struct st_context *st)
68 {
69 struct pipe_screen *screen = st->pipe->screen;
70 struct gl_constants *c = &st->ctx->Const;
71 gl_shader_type sh;
72 boolean can_ubo = TRUE;
73
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->FragmentProgram.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->VertexProgram.MaxTextureImageUnits
98 = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
99 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
100 MAX_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->FragmentProgram.MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
108
109 c->MaxTextureUnits = _min(c->FragmentProgram.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 c->MaxUniformBlockSize =
165 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
166 PIPE_SHADER_CAP_MAX_CONSTS) * 16;
167 if (c->MaxUniformBlockSize < 16384) {
168 can_ubo = FALSE;
169 }
170
171 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) {
172 struct gl_shader_compiler_options *options =
173 &st->ctx->ShaderCompilerOptions[sh];
174 struct gl_program_constants *pc;
175
176 switch (sh) {
177 case PIPE_SHADER_FRAGMENT:
178 pc = &c->FragmentProgram;
179 break;
180 case PIPE_SHADER_VERTEX:
181 pc = &c->VertexProgram;
182 break;
183 case PIPE_SHADER_GEOMETRY:
184 pc = &c->GeometryProgram;
185 break;
186 default:
187 assert(0);
188 continue;
189 }
190
191 pc->MaxInstructions = pc->MaxNativeInstructions =
192 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
193 pc->MaxAluInstructions = pc->MaxNativeAluInstructions =
194 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
195 pc->MaxTexInstructions = pc->MaxNativeTexInstructions =
196 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
197 pc->MaxTexIndirections = pc->MaxNativeTexIndirections =
198 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
199 pc->MaxAttribs = pc->MaxNativeAttribs =
200 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
201 pc->MaxTemps = pc->MaxNativeTemps =
202 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
203 pc->MaxAddressRegs = pc->MaxNativeAddressRegs =
204 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS);
205 pc->MaxParameters = pc->MaxNativeParameters =
206 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);
207
208 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
209
210 pc->MaxUniformBlocks =
211 screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
212 if (pc->MaxUniformBlocks)
213 pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
214
215 pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
216 c->MaxUniformBlockSize / 4 *
217 pc->MaxUniformBlocks);
218
219 /* Gallium doesn't really care about local vs. env parameters so use the
220 * same limits.
221 */
222 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
223 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
224
225 options->EmitNoNoise = TRUE;
226
227 /* TODO: make these more fine-grained if anyone needs it */
228 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
229 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
230 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
231 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
232
233 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
234
235 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
236 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
237 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
238 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
239 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
240 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
241 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
242 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
243
244 if (pc->MaxNativeInstructions &&
245 (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
246 can_ubo = FALSE;
247 }
248
249 if (options->EmitNoLoops)
250 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
251 else
252 options->MaxUnrollIterations = 255; /* SM3 limit */
253 options->LowerClipDistance = true;
254 }
255
256 c->VertexProgram.MaxAttribs = MIN2(c->VertexProgram.MaxAttribs, 16);
257
258 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
259 * of inputs. It's always 2 colors + N generic inputs. */
260 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
261 PIPE_SHADER_CAP_MAX_INPUTS);
262 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
263 c->MaxVaryingComponents = c->MaxVarying * 4;
264
265 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
266 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
267
268 c->UniformBooleanTrue = ~0;
269
270 c->MaxTransformFeedbackBuffers =
271 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
272 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
273 c->MaxTransformFeedbackSeparateComponents =
274 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
275 c->MaxTransformFeedbackInterleavedComponents =
276 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
277
278 c->StripTextureBorder = GL_TRUE;
279
280 c->GLSLSkipStrictMaxUniformLimitCheck =
281 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
282
283 c->GLSLSkipStrictMaxVaryingLimitCheck =
284 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS);
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->VertexProgram.MaxUniformBlocks +
292 c->GeometryProgram.MaxUniformBlocks +
293 c->FragmentProgram.MaxUniformBlocks;
294 }
295 }
296
297
298 static GLboolean st_get_s3tc_override(void)
299 {
300 const char *override = _mesa_getenv("force_s3tc_enable");
301 if (override && !strcmp(override, "true"))
302 return GL_TRUE;
303 return GL_FALSE;
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_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
386 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
387 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
388 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
389 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
390 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
391 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
392 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
393 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
394 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
395 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
396 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
397 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
398 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
399 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
400 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
401 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
402
403 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
404 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
405 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP },
406 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
407 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
408 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
409 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
410 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
411 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
412
413 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
414 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
415 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
416 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
417 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
418 /* GL_NV_point_sprite is not supported by gallium because we don't
419 * support the GL_POINT_SPRITE_R_MODE_NV option. */
420 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
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_B10G10R10A2_UINT } },
435
436 { { o(EXT_framebuffer_sRGB) },
437 { PIPE_FORMAT_A8B8G8R8_SRGB,
438 PIPE_FORMAT_B8G8R8A8_SRGB },
439 GL_TRUE }, /* at least one format must be supported */
440
441 { { o(EXT_packed_float) },
442 { PIPE_FORMAT_R11G11B10_FLOAT } },
443
444 { { o(EXT_texture_integer) },
445 { PIPE_FORMAT_R32G32B32A32_UINT,
446 PIPE_FORMAT_R32G32B32A32_SINT } },
447
448 { { o(ARB_texture_rg) },
449 { PIPE_FORMAT_R8_UNORM,
450 PIPE_FORMAT_R8G8_UNORM } },
451 };
452
453 /* Required: depth stencil and sampler support */
454 static const struct st_extension_format_mapping depthstencil_mapping[] = {
455 { { o(ARB_depth_buffer_float) },
456 { PIPE_FORMAT_Z32_FLOAT,
457 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
458
459 { { o(ARB_framebuffer_object),
460 o(EXT_packed_depth_stencil) },
461 { PIPE_FORMAT_S8_UINT_Z24_UNORM,
462 PIPE_FORMAT_Z24_UNORM_S8_UINT },
463 GL_TRUE }, /* at least one format must be supported */
464 };
465
466 /* Required: sampler support */
467 static const struct st_extension_format_mapping texture_mapping[] = {
468 { { o(ARB_texture_compression_rgtc) },
469 { PIPE_FORMAT_RGTC1_UNORM,
470 PIPE_FORMAT_RGTC1_SNORM,
471 PIPE_FORMAT_RGTC2_UNORM,
472 PIPE_FORMAT_RGTC2_SNORM } },
473
474 { { o(EXT_texture_compression_latc) },
475 { PIPE_FORMAT_LATC1_UNORM,
476 PIPE_FORMAT_LATC1_SNORM,
477 PIPE_FORMAT_LATC2_UNORM,
478 PIPE_FORMAT_LATC2_SNORM } },
479
480 { { o(EXT_texture_compression_s3tc),
481 o(ANGLE_texture_compression_dxt) },
482 { PIPE_FORMAT_DXT1_RGB,
483 PIPE_FORMAT_DXT1_RGBA,
484 PIPE_FORMAT_DXT3_RGBA,
485 PIPE_FORMAT_DXT5_RGBA } },
486
487 { { o(EXT_texture_shared_exponent) },
488 { PIPE_FORMAT_R9G9B9E5_FLOAT } },
489
490 { { o(EXT_texture_snorm) },
491 { PIPE_FORMAT_R8G8B8A8_SNORM } },
492
493 { { o(EXT_texture_sRGB),
494 o(EXT_texture_sRGB_decode) },
495 { PIPE_FORMAT_A8B8G8R8_SRGB,
496 PIPE_FORMAT_B8G8R8A8_SRGB },
497 GL_TRUE }, /* at least one format must be supported */
498
499 { { o(ATI_texture_compression_3dc) },
500 { PIPE_FORMAT_LATC2_UNORM } },
501
502 { { o(MESA_ycbcr_texture) },
503 { PIPE_FORMAT_UYVY,
504 PIPE_FORMAT_YUYV },
505 GL_TRUE }, /* at least one format must be supported */
506
507 { { o(OES_compressed_ETC1_RGB8_texture) },
508 { PIPE_FORMAT_ETC1_RGB8 } },
509 };
510
511 /* Required: vertex fetch support. */
512 static const struct st_extension_format_mapping vertex_mapping[] = {
513 { { o(ARB_vertex_type_2_10_10_10_rev) },
514 { PIPE_FORMAT_R10G10B10A2_UNORM,
515 PIPE_FORMAT_B10G10R10A2_UNORM,
516 PIPE_FORMAT_R10G10B10A2_SNORM,
517 PIPE_FORMAT_B10G10R10A2_SNORM,
518 PIPE_FORMAT_R10G10B10A2_USCALED,
519 PIPE_FORMAT_B10G10R10A2_USCALED,
520 PIPE_FORMAT_R10G10B10A2_SSCALED,
521 PIPE_FORMAT_B10G10R10A2_SSCALED } },
522 };
523
524 static const struct st_extension_format_mapping tbo_rgb32[] = {
525 { {o(ARB_texture_buffer_object_rgb32) },
526 { PIPE_FORMAT_R32G32B32_FLOAT,
527 PIPE_FORMAT_R32G32B32_UINT,
528 PIPE_FORMAT_R32G32B32_SINT,
529 } },
530 };
531
532 /*
533 * Extensions that are supported by all Gallium drivers:
534 */
535 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
536 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
537 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
538 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
539 ctx->Extensions.ARB_fragment_program = GL_TRUE;
540 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
541 ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
542 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
543 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
544 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
545 ctx->Extensions.ARB_shader_objects = GL_TRUE;
546 ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
547 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
548 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
549 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
550 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
551 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
552 ctx->Extensions.ARB_texture_storage = GL_TRUE;
553 ctx->Extensions.ARB_vertex_program = GL_TRUE;
554 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
555
556 ctx->Extensions.EXT_blend_color = GL_TRUE;
557 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
558 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
559 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
560 ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
561 ctx->Extensions.EXT_fog_coord = GL_TRUE;
562 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
563 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
564 ctx->Extensions.EXT_point_parameters = GL_TRUE;
565 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
566 ctx->Extensions.EXT_secondary_color = GL_TRUE;
567 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE;
568 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
569 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
570
571 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
572
573 ctx->Extensions.MESA_pack_invert = GL_TRUE;
574
575 ctx->Extensions.NV_blend_square = GL_TRUE;
576 ctx->Extensions.NV_fog_distance = GL_TRUE;
577 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
578 ctx->Extensions.NV_texture_rectangle = GL_TRUE;
579
580 ctx->Extensions.OES_EGL_image = GL_TRUE;
581 if (ctx->API != API_OPENGL_COMPAT)
582 ctx->Extensions.OES_EGL_image_external = GL_TRUE;
583 ctx->Extensions.OES_draw_texture = GL_TRUE;
584
585 /* Expose the extensions which directly correspond to gallium caps. */
586 for (i = 0; i < Elements(cap_mapping); i++) {
587 if (screen->get_param(screen, cap_mapping[i].cap)) {
588 extensions[cap_mapping[i].extension_offset] = GL_TRUE;
589 }
590 }
591
592 /* Expose the extensions which directly correspond to gallium formats. */
593 init_format_extensions(st, rendertarget_mapping,
594 Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
595 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
596 init_format_extensions(st, depthstencil_mapping,
597 Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
598 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
599 init_format_extensions(st, texture_mapping, Elements(texture_mapping),
600 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
601 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
602 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);
603
604 /* Figure out GLSL support. */
605 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
606
607 if (glsl_feature_level >= 140) {
608 ctx->Const.GLSLVersion = 140;
609 } else if (glsl_feature_level >= 130) {
610 ctx->Const.GLSLVersion = 130;
611 } else {
612 ctx->Const.GLSLVersion = 120;
613 }
614
615 _mesa_override_glsl_version(st->ctx);
616
617 if (ctx->Const.GLSLVersion >= 130) {
618 ctx->Const.NativeIntegers = GL_TRUE;
619 ctx->Const.MaxClipPlanes = 8;
620
621 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
622 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
623 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
624 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
625 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
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_get_s3tc_override()) {
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 }
721
722 if (ctx->Const.MaxDualSourceDrawBuffers > 0)
723 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
724
725 st->has_time_elapsed =
726 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
727
728 if (st->has_time_elapsed ||
729 ctx->Extensions.ARB_timer_query) {
730 ctx->Extensions.EXT_timer_query = GL_TRUE;
731 }
732
733 if (ctx->Extensions.ARB_transform_feedback2 &&
734 ctx->Extensions.ARB_draw_instanced) {
735 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
736 }
737 if (st->options.force_glsl_extensions_warn)
738 ctx->Const.ForceGLSLExtensionsWarn = 1;
739
740 if (st->options.disable_glsl_line_continuations)
741 ctx->Const.DisableGLSLLineContinuations = 1;
742
743 ctx->Const.MinMapBufferAlignment =
744 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
745 if (ctx->Const.MinMapBufferAlignment >= 64) {
746 ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
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.TextureBufferOffsetAlignment =
752 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
753
754 if (ctx->Const.TextureBufferOffsetAlignment)
755 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
756
757 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
758 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
759 }
760
761
762 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
763 * If the number of available texture indirections is very limited, then we
764 * prefer to disable varying packing rather than run the risk of varying
765 * packing preventing a shader from running.
766 */
767 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
768 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
769 /* We can't disable varying packing if transform feedback is available,
770 * because transform feedback code assumes a packed varying layout.
771 */
772 if (!ctx->Extensions.EXT_transform_feedback)
773 ctx->Const.DisableVaryingPacking = GL_TRUE;
774 }
775 }