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mesa/st: set min/max texture gather offset to driver-reported value
[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->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
279 c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
280
281 c->UniformBooleanTrue = ~0;
282
283 c->MaxTransformFeedbackBuffers =
284 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
285 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
286 c->MaxTransformFeedbackSeparateComponents =
287 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
288 c->MaxTransformFeedbackInterleavedComponents =
289 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
290
291 c->StripTextureBorder = GL_TRUE;
292
293 c->GLSLSkipStrictMaxUniformLimitCheck =
294 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);
295
296 if (can_ubo) {
297 st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
298 c->UniformBufferOffsetAlignment =
299 screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
300 c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
301 c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
302 c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
303 c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
304 assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
305 }
306 }
307
308
309 /**
310 * Given a member \c x of struct gl_extensions, return offset of
311 * \c x in bytes.
312 */
313 #define o(x) offsetof(struct gl_extensions, x)
314
315
316 struct st_extension_cap_mapping {
317 int extension_offset;
318 int cap;
319 };
320
321 struct st_extension_format_mapping {
322 int extension_offset[2];
323 enum pipe_format format[8];
324
325 /* If TRUE, at least one format must be supported for the extensions to be
326 * advertised. If FALSE, all the formats must be supported. */
327 GLboolean need_at_least_one;
328 };
329
330 /**
331 * Enable extensions if certain pipe formats are supported by the driver.
332 * What extensions will be enabled and what formats must be supported is
333 * described by the array of st_extension_format_mapping.
334 *
335 * target and bind_flags are passed to is_format_supported.
336 */
337 static void init_format_extensions(struct st_context *st,
338 const struct st_extension_format_mapping *mapping,
339 unsigned num_mappings,
340 enum pipe_texture_target target,
341 unsigned bind_flags)
342 {
343 struct pipe_screen *screen = st->pipe->screen;
344 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
345 unsigned i;
346 int j;
347 int num_formats = Elements(mapping->format);
348 int num_ext = Elements(mapping->extension_offset);
349
350 for (i = 0; i < num_mappings; i++) {
351 int num_supported = 0;
352
353 /* Examine each format in the list. */
354 for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
355 if (screen->is_format_supported(screen, mapping[i].format[j],
356 target, 0, bind_flags)) {
357 num_supported++;
358 }
359 }
360
361 if (!num_supported ||
362 (!mapping[i].need_at_least_one && num_supported != j)) {
363 continue;
364 }
365
366 /* Enable all extensions in the list. */
367 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
368 extensions[mapping[i].extension_offset[j]] = GL_TRUE;
369 }
370 }
371
372 /**
373 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
374 * which GL extensions are supported.
375 * Quite a few extensions are always supported because they are standard
376 * features or can be built on top of other gallium features.
377 * Some fine tuning may still be needed.
378 */
379 void st_init_extensions(struct st_context *st)
380 {
381 struct pipe_screen *screen = st->pipe->screen;
382 struct gl_context *ctx = st->ctx;
383 int i, glsl_feature_level;
384 GLboolean *extensions = (GLboolean *) &ctx->Extensions;
385
386 static const struct st_extension_cap_mapping cap_mapping[] = {
387 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE },
388 { o(ARB_buffer_storage), PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
389 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE },
390 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP },
391 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC },
392 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID },
393 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
394 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR },
395 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY },
396 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY },
397 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE },
398 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP },
399 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT },
400 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 },
401 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP },
402 { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
403 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES },
404 { o(ARB_timer_query), PIPE_CAP_QUERY_TIMESTAMP },
405 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
406 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME },
407
408 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE },
409 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE },
410 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL },
411 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS },
412 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER },
413 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
414 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE },
415 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS },
416
417 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE },
418 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL },
419 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP },
420 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER },
421 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER },
422 /* GL_NV_point_sprite is not supported by gallium because we don't
423 * support the GL_POINT_SPRITE_R_MODE_NV option. */
424
425 { o(OES_standard_derivatives), PIPE_CAP_SM3 },
426 { o(ARB_texture_cube_map_array), PIPE_CAP_CUBE_MAP_ARRAY },
427 { o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
428 { o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD }
429 };
430
431 /* Required: render target and sampler support */
432 static const struct st_extension_format_mapping rendertarget_mapping[] = {
433 { { o(ARB_texture_float) },
434 { PIPE_FORMAT_R32G32B32A32_FLOAT,
435 PIPE_FORMAT_R16G16B16A16_FLOAT } },
436
437 { { o(ARB_texture_rgb10_a2ui) },
438 { PIPE_FORMAT_R10G10B10A2_UINT,
439 PIPE_FORMAT_B10G10R10A2_UINT },
440 GL_TRUE }, /* at least one format must be supported */
441
442 { { o(EXT_framebuffer_sRGB) },
443 { PIPE_FORMAT_A8B8G8R8_SRGB,
444 PIPE_FORMAT_B8G8R8A8_SRGB },
445 GL_TRUE }, /* at least one format must be supported */
446
447 { { o(EXT_packed_float) },
448 { PIPE_FORMAT_R11G11B10_FLOAT } },
449
450 { { o(EXT_texture_integer) },
451 { PIPE_FORMAT_R32G32B32A32_UINT,
452 PIPE_FORMAT_R32G32B32A32_SINT } },
453
454 { { o(ARB_texture_rg) },
455 { PIPE_FORMAT_R8_UNORM,
456 PIPE_FORMAT_R8G8_UNORM } },
457 };
458
459 /* Required: depth stencil and sampler support */
460 static const struct st_extension_format_mapping depthstencil_mapping[] = {
461 { { o(ARB_depth_buffer_float) },
462 { PIPE_FORMAT_Z32_FLOAT,
463 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
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 { { o(ARB_vertex_type_10f_11f_11f_rev) },
523 { PIPE_FORMAT_R11G11B10_FLOAT } },
524 };
525
526 static const struct st_extension_format_mapping tbo_rgb32[] = {
527 { {o(ARB_texture_buffer_object_rgb32) },
528 { PIPE_FORMAT_R32G32B32_FLOAT,
529 PIPE_FORMAT_R32G32B32_UINT,
530 PIPE_FORMAT_R32G32B32_SINT,
531 } },
532 };
533
534 /*
535 * Extensions that are supported by all Gallium drivers:
536 */
537 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
538 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
539 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
540 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
541 ctx->Extensions.ARB_fragment_program = GL_TRUE;
542 ctx->Extensions.ARB_fragment_shader = GL_TRUE;
543 ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
544 ctx->Extensions.ARB_internalformat_query = GL_TRUE;
545 ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
546 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
547 ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
548 ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
549 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
550 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
551 ctx->Extensions.ARB_vertex_program = GL_TRUE;
552 ctx->Extensions.ARB_vertex_shader = GL_TRUE;
553
554 ctx->Extensions.EXT_blend_color = GL_TRUE;
555 ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
556 ctx->Extensions.EXT_blend_minmax = GL_TRUE;
557 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
558 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
559 ctx->Extensions.EXT_point_parameters = GL_TRUE;
560 ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
561
562 /* IMPORTANT:
563 * Don't enable EXT_separate_shader_objects. It disallows a certain
564 * optimization in the GLSL compiler and therefore is considered
565 * harmful.
566 */
567 ctx->Extensions.EXT_separate_shader_objects = GL_FALSE;
568
569 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
570 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
571
572 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
573
574 ctx->Extensions.MESA_pack_invert = GL_TRUE;
575
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 ctx->Extensions.NV_vdpau_interop = GL_TRUE;
580
581 ctx->Extensions.OES_EGL_image = GL_TRUE;
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 ctx->Const.GLSLVersion = glsl_feature_level;
608 if (glsl_feature_level >= 330)
609 ctx->Const.GLSLVersion = 330;
610
611 _mesa_override_glsl_version(st->ctx);
612
613 if (st->options.force_glsl_version > 0 &&
614 st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
615 ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
616 }
617
618 /* This extension needs full OpenGL 3.2, but we don't know if that's
619 * supported at this point. Only check the GLSL version. */
620 if (ctx->Const.GLSLVersion >= 150 &&
621 screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
622 ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
623 }
624
625 if (ctx->Const.GLSLVersion >= 130) {
626 ctx->Const.NativeIntegers = GL_TRUE;
627 ctx->Const.MaxClipPlanes = 8;
628
629 /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
630 ctx->Extensions.ARB_conservative_depth = GL_TRUE;
631 ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
632 ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
633 ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
634
635 if (!st->options.disable_shader_bit_encoding) {
636 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
637 }
638 } else {
639 /* Optional integer support for GLSL 1.2. */
640 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
641 PIPE_SHADER_CAP_INTEGERS) &&
642 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
643 PIPE_SHADER_CAP_INTEGERS)) {
644 ctx->Const.NativeIntegers = GL_TRUE;
645 }
646 }
647
648 /* Below are the cases which cannot be moved into tables easily. */
649
650 if (!ctx->Mesa_DXTn && !st->options.force_s3tc_enable) {
651 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
652 ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
653 }
654
655 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
656 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
657 #if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
658 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
659 #endif
660 }
661
662 ctx->Extensions.NV_primitive_restart = GL_TRUE;
663 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
664 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
665 }
666
667 /* ARB_color_buffer_float. */
668 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
669 ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
670
671 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
672 st->clamp_vert_color_in_shader = TRUE;
673 }
674
675 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
676 st->clamp_frag_color_in_shader = TRUE;
677 }
678
679 /* For drivers which cannot do color clamping, it's better to just
680 * disable ARB_color_buffer_float in the core profile, because
681 * the clamping is deprecated there anyway. */
682 if (ctx->API == API_OPENGL_CORE &&
683 (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
684 st->clamp_vert_color_in_shader = GL_FALSE;
685 st->clamp_frag_color_in_shader = GL_FALSE;
686 ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
687 }
688 }
689
690 if (screen->fence_finish) {
691 ctx->Extensions.ARB_sync = GL_TRUE;
692 }
693
694 /* Maximum sample count. */
695 for (i = 16; i > 0; --i) {
696 enum pipe_format pformat = st_choose_format(st, GL_RGBA,
697 GL_NONE, GL_NONE,
698 PIPE_TEXTURE_2D, i,
699 PIPE_BIND_RENDER_TARGET, FALSE);
700 if (pformat != PIPE_FORMAT_NONE) {
701 ctx->Const.MaxSamples = i;
702 ctx->Const.MaxColorTextureSamples = i;
703 break;
704 }
705 }
706 for (i = ctx->Const.MaxSamples; i > 0; --i) {
707 enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
708 GL_NONE, GL_NONE,
709 PIPE_TEXTURE_2D, i,
710 PIPE_BIND_DEPTH_STENCIL, FALSE);
711 if (pformat != PIPE_FORMAT_NONE) {
712 ctx->Const.MaxDepthTextureSamples = i;
713 break;
714 }
715 }
716 for (i = ctx->Const.MaxSamples; i > 0; --i) {
717 enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
718 GL_NONE, GL_NONE,
719 PIPE_TEXTURE_2D, i,
720 PIPE_BIND_RENDER_TARGET, FALSE);
721 if (pformat != PIPE_FORMAT_NONE) {
722 ctx->Const.MaxIntegerSamples = i;
723 break;
724 }
725 }
726 if (ctx->Const.MaxSamples == 1) {
727 /* one sample doesn't really make sense */
728 ctx->Const.MaxSamples = 0;
729 }
730 else if (ctx->Const.MaxSamples >= 2) {
731 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
732 ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
733 }
734
735 if (ctx->Const.MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
736 ctx->Const.FakeSWMSAA = GL_TRUE;
737 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
738 ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
739 ctx->Extensions.ARB_texture_multisample = GL_TRUE;
740 }
741
742 if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
743 !st->options.disable_blend_func_extended)
744 ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
745
746 st->has_time_elapsed =
747 screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);
748
749 if (st->has_time_elapsed ||
750 ctx->Extensions.ARB_timer_query) {
751 ctx->Extensions.EXT_timer_query = GL_TRUE;
752 }
753
754 if (ctx->Extensions.ARB_transform_feedback2 &&
755 ctx->Extensions.ARB_draw_instanced) {
756 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
757 }
758 if (st->options.force_glsl_extensions_warn)
759 ctx->Const.ForceGLSLExtensionsWarn = 1;
760
761 if (st->options.disable_glsl_line_continuations)
762 ctx->Const.DisableGLSLLineContinuations = 1;
763
764 ctx->Const.MinMapBufferAlignment =
765 screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
766
767 if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
768 ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
769
770 ctx->Const.MaxTextureBufferSize =
771 _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
772 (1u << 31) - 1);
773 ctx->Const.TextureBufferOffsetAlignment =
774 screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
775
776 if (ctx->Const.TextureBufferOffsetAlignment)
777 ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
778
779 init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
780 PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
781 }
782
783 if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
784 ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
785 }
786
787 /* Unpacking a varying in the fragment shader costs 1 texture indirection.
788 * If the number of available texture indirections is very limited, then we
789 * prefer to disable varying packing rather than run the risk of varying
790 * packing preventing a shader from running.
791 */
792 if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
793 PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
794 /* We can't disable varying packing if transform feedback is available,
795 * because transform feedback code assumes a packed varying layout.
796 */
797 if (!ctx->Extensions.EXT_transform_feedback)
798 ctx->Const.DisableVaryingPacking = GL_TRUE;
799 }
800
801 if (ctx->API == API_OPENGL_CORE) {
802 ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
803 if (ctx->Const.MaxViewports >= 16) {
804 ctx->Const.ViewportBounds.Min = -16384.0;
805 ctx->Const.ViewportBounds.Max = 16384.0;
806 ctx->Extensions.ARB_viewport_array = GL_TRUE;
807 }
808 }
809 if (ctx->Const.MaxProgramTextureGatherComponents > 0)
810 ctx->Extensions.ARB_texture_gather = GL_TRUE;
811 }