st_extensions.c 56.2 KB
Newer Older
1 2
/**************************************************************************
 * 
Jose Fonseca's avatar
Jose Fonseca committed
3
 * Copyright 2007 VMware, Inc.
4
 * Copyright (c) 2008 VMware, Inc.
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Jose Fonseca's avatar
Jose Fonseca committed
22
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 24 25 26 27 28
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

29 30
#include "compiler/nir/nir.h"

31 32 33
#include "main/imports.h"
#include "main/context.h"
#include "main/macros.h"
34
#include "main/version.h"
35 36 37

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
38
#include "pipe/p_screen.h"
39
#include "tgsi/tgsi_from_mesa.h"
40
#include "util/u_math.h"
41 42

#include "st_context.h"
Rob Clark's avatar
Rob Clark committed
43
#include "st_debug.h"
44
#include "st_extensions.h"
45
#include "st_format.h"
46

47 48 49 50 51 52

/*
 * Note: we use these function rather than the MIN2, MAX2, CLAMP macros to
 * avoid evaluating arguments (which are often function calls) more than once.
 */

53
static unsigned _min(unsigned a, unsigned b)
54 55 56 57
{
   return (a < b) ? a : b;
}

58
static float _maxf(float a, float b)
59 60 61 62
{
   return (a > b) ? a : b;
}

63
static int _clamp(int a, int min, int max)
64
{
65 66 67 68 69 70
   if (a < min)
      return min;
   else if (a > max)
      return max;
   else
      return a;
71 72 73
}


74 75 76 77
/**
 * Query driver to get implementation limits.
 * Note that we have to limit/clamp against Mesa's internal limits too.
 */
78
void st_init_limits(struct pipe_screen *screen,
79 80
                    struct gl_constants *c, struct gl_extensions *extensions,
                    gl_api api)
81
{
82
   int supported_irs;
83
   unsigned sh;
84
   boolean can_ubo = TRUE;
85
   int temp;
86
   bool ssbo_atomic = true;
87 88

   c->MaxTextureLevels
89
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
90
            MAX_TEXTURE_LEVELS);
91

92
   c->Max3DTextureLevels
93
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
94
            MAX_3D_TEXTURE_LEVELS);
95

96
   c->MaxCubeTextureLevels
97
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
98
            MAX_CUBE_TEXTURE_LEVELS);
99

100
   c->MaxTextureRectSize
101
      = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
102

103 104 105
   c->MaxArrayTextureLayers
      = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);

106 107 108 109 110 111 112 113
   /* Define max viewport size and max renderbuffer size in terms of
    * max texture size (note: max tex RECT size = max tex 2D size).
    * If this isn't true for some hardware we'll need new PIPE_CAP_ queries.
    */
   c->MaxViewportWidth =
   c->MaxViewportHeight =
   c->MaxRenderbufferSize = c->MaxTextureRectSize;

114 115 116
   c->ViewportSubpixelBits =
      screen->get_param(screen, PIPE_CAP_VIEWPORT_SUBPIXEL_BITS);

117 118 119
   c->MaxDrawBuffers = c->MaxColorAttachments =
      _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
             1, MAX_DRAW_BUFFERS);
120

121 122 123 124 125 126 127 128 129 130 131 132 133 134
   c->MaxDualSourceDrawBuffers =
      _clamp(screen->get_param(screen,
                               PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
             0, MAX_DRAW_BUFFERS);

   c->MaxLineWidth =
      _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH));
   c->MaxLineWidthAA =
      _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_LINE_WIDTH_AA));

   c->MaxPointSize =
      _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH));
   c->MaxPointSizeAA =
      _maxf(1.0f, screen->get_paramf(screen, PIPE_CAPF_MAX_POINT_WIDTH_AA));
135

136 137 138 139 140
   /* these are not queryable. Note that GL basically mandates a 1.0 minimum
    * for non-aa sizes, but we can go down to 0.0 for aa points.
    */
   c->MinPointSize = 1.0f;
   c->MinPointSizeAA = 0.0f;
141

142 143 144
   c->MaxTextureMaxAnisotropy =
      _maxf(2.0f,
            screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
145

146 147
   c->MaxTextureLodBias =
      screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
148

149 150 151
   c->QuadsFollowProvokingVertexConvention =
      screen->get_param(screen,
                        PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
152

153 154
   c->MaxUniformBlockSize =
      screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
155
                               PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE);
156 157 158 159
   if (c->MaxUniformBlockSize < 16384) {
      can_ubo = FALSE;
   }

160 161
   for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
      struct gl_shader_compiler_options *options;
162
      struct gl_program_constants *pc;
163 164 165 166 167 168
      const nir_shader_compiler_options *nir_options = NULL;

      if (screen->get_compiler_options) {
         nir_options = (const nir_shader_compiler_options *)
            screen->get_compiler_options(screen, PIPE_SHADER_IR_NIR, sh);
      }
169

170 171 172 173
      const gl_shader_stage stage = tgsi_processor_to_shader_stage(sh);
      pc = &c->Program[stage];
      options = &c->ShaderCompilerOptions[stage];
      c->ShaderCompilerOptions[stage].NirOptions = nir_options;
174

175
      if (sh == PIPE_SHADER_COMPUTE) {
176 177 178 179 180 181
         if (!screen->get_param(screen, PIPE_CAP_COMPUTE))
            continue;
         supported_irs =
            screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUPPORTED_IRS);
         if (!(supported_irs & (1 << PIPE_SHADER_IR_TGSI)))
            continue;
182 183
      }

184 185 186 187 188
      pc->MaxTextureImageUnits =
         _min(screen->get_shader_param(screen, sh,
                                       PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
              MAX_TEXTURE_IMAGE_UNITS);

189 190
      pc->MaxInstructions =
      pc->MaxNativeInstructions =
191
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
192 193 194 195 196 197 198 199 200 201 202 203 204 205
      pc->MaxAluInstructions =
      pc->MaxNativeAluInstructions =
         screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS);
      pc->MaxTexInstructions =
      pc->MaxNativeTexInstructions =
         screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS);
      pc->MaxTexIndirections =
      pc->MaxNativeTexIndirections =
         screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS);
      pc->MaxAttribs =
      pc->MaxNativeAttribs =
206
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
207 208
      pc->MaxTemps =
      pc->MaxNativeTemps =
209
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
210 211 212 213
      pc->MaxAddressRegs =
      pc->MaxNativeAddressRegs = sh == PIPE_SHADER_VERTEX ? 1 : 0;
      pc->MaxParameters =
      pc->MaxNativeParameters =
214 215
         screen->get_shader_param(screen, sh,
                   PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
216 217 218 219
      pc->MaxInputComponents =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS) * 4;
      pc->MaxOutputComponents =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_OUTPUTS) * 4;
220

221 222
      pc->MaxUniformComponents =
         4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);
223 224

      pc->MaxUniformBlocks =
225 226
         screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
227 228
      if (pc->MaxUniformBlocks)
         pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
229
      pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
230 231 232 233

      pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
                                          c->MaxUniformBlockSize / 4 *
                                          pc->MaxUniformBlocks);
234

235 236 237 238 239 240 241 242 243 244 245 246 247 248 249
      temp = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS);
      if (temp) {
         /*
          * for separate atomic counters get the actual hw limits
          * per stage on atomic counters and buffers
          */
         ssbo_atomic = false;
         pc->MaxAtomicCounters = temp;
         pc->MaxAtomicBuffers = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS);
         pc->MaxShaderStorageBlocks = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS);
      } else {
         pc->MaxAtomicCounters = MAX_ATOMIC_COUNTERS;
         pc->MaxAtomicBuffers = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS) / 2;
         pc->MaxShaderStorageBlocks = pc->MaxAtomicBuffers;
      }
250 251 252
      pc->MaxImageUniforms = screen->get_shader_param(
            screen, sh, PIPE_SHADER_CAP_MAX_SHADER_IMAGES);

253 254 255
      /* Gallium doesn't really care about local vs. env parameters so use the
       * same limits.
       */
256 257
      pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
      pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
258

259 260 261 262 263 264 265
      if (screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INTEGERS)) {
         pc->LowInt.RangeMin = 31;
         pc->LowInt.RangeMax = 30;
         pc->LowInt.Precision = 0;
         pc->MediumInt = pc->HighInt = pc->LowInt;
      }

266
      /* TODO: make these more fine-grained if anyone needs it */
267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
      options->MaxIfDepth =
         screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
      options->EmitNoLoops =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
      options->EmitNoMainReturn =
         !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);

      options->EmitNoCont =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);

      options->EmitNoIndirectInput =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
      options->EmitNoIndirectOutput =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
      options->EmitNoIndirectTemp =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
      options->EmitNoIndirectUniform =
         !screen->get_shader_param(screen, sh,
                                   PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);
292

293 294
      if (pc->MaxNativeInstructions &&
          (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
295 296 297
         can_ubo = FALSE;
      }

Brian Paul's avatar
Brian Paul committed
298
      if (options->EmitNoLoops)
299 300 301 302
         options->MaxUnrollIterations =
            MIN2(screen->get_shader_param(screen, sh,
                                          PIPE_SHADER_CAP_MAX_INSTRUCTIONS),
                 65536);
303
      else
304 305 306
         options->MaxUnrollIterations =
            screen->get_shader_param(screen, sh,
                                  PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT);
307

308
      options->LowerCombinedClipCullDistance = true;
309
      options->LowerBufferInterfaceBlocks = true;
310
   }
311

312 313
   c->GLSLOptimizeConservatively =
      screen->get_param(screen, PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY);
314
   c->LowerTessLevel = true;
315
   c->LowerCsDerivedVariables = true;
316 317
   c->PrimitiveRestartForPatches =
      screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART_FOR_PATCHES);
318

319 320
   c->MaxCombinedTextureImageUnits =
         _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
321 322
              c->Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits +
              c->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits +
323
              c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
324 325
              c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits +
              c->Program[MESA_SHADER_COMPUTE].MaxTextureImageUnits,
326 327
              MAX_COMBINED_TEXTURE_IMAGE_UNITS);

328 329
   /* This depends on program constants. */
   c->MaxTextureCoordUnits
330 331
      = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
             MAX_TEXTURE_COORD_UNITS);
332

333 334 335
   c->MaxTextureUnits =
      _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
           c->MaxTextureCoordUnits);
336

337 338
   c->Program[MESA_SHADER_VERTEX].MaxAttribs =
      MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
339

340 341 342 343
   /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number
    * of inputs. It's always 2 colors + N generic inputs. */
   c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
                                            PIPE_SHADER_CAP_MAX_INPUTS);
344
   c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
345 346 347 348
   c->MaxGeometryOutputVertices =
      screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES);
   c->MaxGeometryTotalOutputComponents =
      screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS);
349
   c->MaxTessPatchComponents =
350
      MIN2(screen->get_param(screen, PIPE_CAP_MAX_SHADER_PATCH_VARYINGS),
351
           MAX_VARYING) * 4;
352

353 354 355 356
   c->MinProgramTexelOffset =
      screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
   c->MaxProgramTexelOffset =
      screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);
357

358 359 360 361 362 363
   c->MaxProgramTextureGatherComponents =
      screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
   c->MinProgramTextureGatherOffset =
      screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
   c->MaxProgramTextureGatherOffset =
      screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);
364

365
   c->MaxTransformFeedbackBuffers =
366
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
367 368
   c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers,
                                         MAX_FEEDBACK_BUFFERS);
369 370 371
   c->MaxTransformFeedbackSeparateComponents =
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
   c->MaxTransformFeedbackInterleavedComponents =
372 373
      screen->get_param(screen,
                        PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
374 375 376 377 378
   c->MaxVertexStreams =
      MAX2(1, screen->get_param(screen, PIPE_CAP_MAX_VERTEX_STREAMS));

   /* The vertex stream must fit into pipe_stream_output_info::stream */
   assert(c->MaxVertexStreams <= 4);
379

380 381 382
   c->MaxVertexAttribStride
      = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);

383
   c->StripTextureBorder = GL_TRUE;
384 385 386 387

   c->GLSLSkipStrictMaxUniformLimitCheck =
      screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS);

388 389 390
   c->UniformBufferOffsetAlignment =
      screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);

391
   if (can_ubo) {
392
      extensions->ARB_uniform_buffer_object = GL_TRUE;
393
      c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
394
         c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
395 396
         c->Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks +
         c->Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks +
397
         c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
398 399
         c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks +
         c->Program[MESA_SHADER_COMPUTE].MaxUniformBlocks;
400
      assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
401
   }
402 403 404 405 406

   c->GLSLFragCoordIsSysVal =
      screen->get_param(screen, PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL);
   c->GLSLFrontFacingIsSysVal =
      screen->get_param(screen, PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL);
407

408 409 410 411 412 413 414 415
   /* GL_ARB_get_program_binary
    *
    * The QT framework has a bug in their shader program cache, which is built
    * on GL_ARB_get_program_binary. In an effort to allow them to fix the bug
    * we don't enable more than 1 binary format for compatibility profiles.
    */
   if (api != API_OPENGL_COMPAT &&
       screen->get_disk_shader_cache && screen->get_disk_shader_cache(screen))
416 417
      c->NumProgramBinaryFormats = 1;

418
   c->MaxAtomicBufferBindings =
419 420 421 422 423 424 425 426 427 428 429 430 431
          c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;

   if (!ssbo_atomic) {
      /* for separate atomic buffers - there atomic buffer size will be
         limited */
      c->MaxAtomicBufferSize = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters * ATOMIC_COUNTER_SIZE;
      /* on all HW with separate atomic (evergreen) the following
         lines are true. not sure it's worth adding CAPs for this at this
         stage. */
      c->MaxCombinedAtomicCounters = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicCounters;
      c->MaxCombinedAtomicBuffers = c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
   } else {
      c->MaxCombinedAtomicBuffers =
432 433 434 435 436
         c->Program[MESA_SHADER_VERTEX].MaxAtomicBuffers +
         c->Program[MESA_SHADER_TESS_CTRL].MaxAtomicBuffers +
         c->Program[MESA_SHADER_TESS_EVAL].MaxAtomicBuffers +
         c->Program[MESA_SHADER_GEOMETRY].MaxAtomicBuffers +
         c->Program[MESA_SHADER_FRAGMENT].MaxAtomicBuffers;
437 438
      assert(c->MaxCombinedAtomicBuffers <= MAX_COMBINED_ATOMIC_BUFFERS);
   }
439

440
   if (c->MaxCombinedAtomicBuffers > 0) {
441
      extensions->ARB_shader_atomic_counters = GL_TRUE;
442 443
      extensions->ARB_shader_atomic_counter_ops = GL_TRUE;
   }
444 445 446 447 448

   c->MaxCombinedShaderOutputResources = c->MaxDrawBuffers;
   c->ShaderStorageBufferOffsetAlignment =
      screen->get_param(screen, PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT);
   if (c->ShaderStorageBufferOffsetAlignment) {
449 450 451 452
      /* for hw atomic counters leaves these at default for now */
      if (ssbo_atomic)
         c->MaxCombinedShaderStorageBlocks = c->MaxShaderStorageBufferBindings =
            c->MaxCombinedAtomicBuffers;
453 454 455
      c->MaxCombinedShaderOutputResources +=
         c->MaxCombinedShaderStorageBlocks;
      c->MaxShaderStorageBlockSize = 1 << 27;
456
      extensions->ARB_shader_storage_buffer_object = GL_TRUE;
457
   }
458 459 460 461 462 463 464 465

   c->MaxCombinedImageUniforms =
         c->Program[MESA_SHADER_VERTEX].MaxImageUniforms +
         c->Program[MESA_SHADER_TESS_CTRL].MaxImageUniforms +
         c->Program[MESA_SHADER_TESS_EVAL].MaxImageUniforms +
         c->Program[MESA_SHADER_GEOMETRY].MaxImageUniforms +
         c->Program[MESA_SHADER_FRAGMENT].MaxImageUniforms +
         c->Program[MESA_SHADER_COMPUTE].MaxImageUniforms;
466
   c->MaxCombinedShaderOutputResources += c->MaxCombinedImageUniforms;
467 468 469 470 471
   c->MaxImageUnits = MAX_IMAGE_UNITS;
   if (c->MaxCombinedImageUniforms) {
      extensions->ARB_shader_image_load_store = GL_TRUE;
      extensions->ARB_shader_image_size = GL_TRUE;
   }
472 473 474 475 476 477 478 479 480 481 482 483

   /* ARB_framebuffer_no_attachments */
   c->MaxFramebufferWidth   = c->MaxViewportWidth;
   c->MaxFramebufferHeight  = c->MaxViewportHeight;
   /* NOTE: we cheat here a little by assuming that
    * PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS has the same
    * number of layers as we need, although we technically
    * could have more the generality is not really useful
    * in practicality.
    */
   c->MaxFramebufferLayers =
      screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);
484 485 486

   c->MaxWindowRectangles =
      screen->get_param(screen, PIPE_CAP_MAX_WINDOW_RECTANGLES);
487 488 489

   c->SparseBufferPageSize =
      screen->get_param(screen, PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE);
490 491 492

   c->AllowMappedBuffersDuringExecution =
      screen->get_param(screen, PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION);
493 494 495

   c->UseSTD430AsDefaultPacking =
      screen->get_param(screen, PIPE_CAP_LOAD_CONSTBUF);
496 497 498 499 500

   /* limit the max combined shader output resources to a driver limit */
   temp = screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SHADER_OUTPUT_RESOURCES);
   if (temp > 0 && c->MaxCombinedShaderOutputResources > temp)
      c->MaxCombinedShaderOutputResources = temp;
501 502 503
}


504 505 506 507 508 509 510 511 512 513 514 515
/**
 * Given a member \c x of struct gl_extensions, return offset of
 * \c x in bytes.
 */
#define o(x) offsetof(struct gl_extensions, x)


struct st_extension_cap_mapping {
   int extension_offset;
   int cap;
};

516 517
struct st_extension_format_mapping {
   int extension_offset[2];
Ilia Mirkin's avatar
Ilia Mirkin committed
518
   enum pipe_format format[32];
519 520 521 522 523 524 525 526 527 528 529 530 531

   /* If TRUE, at least one format must be supported for the extensions to be
    * advertised. If FALSE, all the formats must be supported. */
   GLboolean need_at_least_one;
};

/**
 * Enable extensions if certain pipe formats are supported by the driver.
 * What extensions will be enabled and what formats must be supported is
 * described by the array of st_extension_format_mapping.
 *
 * target and bind_flags are passed to is_format_supported.
 */
532 533 534 535 536 537 538
static void
init_format_extensions(struct pipe_screen *screen,
                       struct gl_extensions *extensions,
                       const struct st_extension_format_mapping *mapping,
                       unsigned num_mappings,
                       enum pipe_texture_target target,
                       unsigned bind_flags)
539
{
540
   GLboolean *extension_table = (GLboolean *) extensions;
541 542
   unsigned i;
   int j;
543 544
   int num_formats = ARRAY_SIZE(mapping->format);
   int num_ext = ARRAY_SIZE(mapping->extension_offset);
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563

   for (i = 0; i < num_mappings; i++) {
      int num_supported = 0;

      /* Examine each format in the list. */
      for (j = 0; j < num_formats && mapping[i].format[j]; j++) {
         if (screen->is_format_supported(screen, mapping[i].format[j],
                                         target, 0, bind_flags)) {
            num_supported++;
         }
      }

      if (!num_supported ||
          (!mapping[i].need_at_least_one && num_supported != j)) {
         continue;
      }

      /* Enable all extensions in the list. */
      for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++)
564 565 566 567 568 569 570 571 572 573 574 575
         extension_table[mapping[i].extension_offset[j]] = GL_TRUE;
   }
}


/**
 * Given a list of formats and bind flags, return the maximum number
 * of samples supported by any of those formats.
 */
static unsigned
get_max_samples_for_formats(struct pipe_screen *screen,
                            unsigned num_formats,
576
                            const enum pipe_format *formats,
577 578 579 580 581 582 583 584 585 586 587 588
                            unsigned max_samples,
                            unsigned bind)
{
   unsigned i, f;

   for (i = max_samples; i > 0; --i) {
      for (f = 0; f < num_formats; f++) {
         if (screen->is_format_supported(screen, formats[f],
                                         PIPE_TEXTURE_2D, i, bind)) {
            return i;
         }
      }
589
   }
590
   return 0;
591
}
592

593

594
/**
595 596 597 598 599
 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine
 * which GL extensions are supported.
 * Quite a few extensions are always supported because they are standard
 * features or can be built on top of other gallium features.
 * Some fine tuning may still be needed.
600
 */
601 602 603
void st_init_extensions(struct pipe_screen *screen,
                        struct gl_constants *consts,
                        struct gl_extensions *extensions,
604 605
                        struct st_config_options *options,
                        gl_api api)
606
{
607
   unsigned i;
608
   GLboolean *extension_table = (GLboolean *) extensions;
609 610

   static const struct st_extension_cap_mapping cap_mapping[] = {
611
      { o(ARB_base_instance),                PIPE_CAP_START_INSTANCE                   },
612
      { o(ARB_bindless_texture),             PIPE_CAP_BINDLESS_TEXTURE                 },
613
      { o(ARB_buffer_storage),               PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT   },
614
      { o(ARB_clear_texture),                PIPE_CAP_CLEAR_TEXTURE                    },
615
      { o(ARB_clip_control),                 PIPE_CAP_CLIP_HALFZ                       },
616
      { o(ARB_color_buffer_float),           PIPE_CAP_VERTEX_COLOR_UNCLAMPED           },
617
      { o(ARB_conditional_render_inverted),  PIPE_CAP_CONDITIONAL_RENDER_INVERTED      },
618
      { o(ARB_copy_image),                   PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS },
619
      { o(OES_copy_image),                   PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS },
Dave Airlie's avatar
Dave Airlie committed
620
      { o(ARB_cull_distance),                PIPE_CAP_CULL_DISTANCE                    },
621
      { o(ARB_depth_clamp),                  PIPE_CAP_DEPTH_CLIP_DISABLE               },
622
      { o(ARB_derivative_control),           PIPE_CAP_TGSI_FS_FINE_DERIVATIVE          },
623
      { o(ARB_draw_buffers_blend),           PIPE_CAP_INDEP_BLEND_FUNC                 },
624
      { o(ARB_draw_indirect),                PIPE_CAP_DRAW_INDIRECT                    },
625
      { o(ARB_draw_instanced),               PIPE_CAP_TGSI_INSTANCEID                  },
626
      { o(ARB_framebuffer_object),           PIPE_CAP_MIXED_FRAMEBUFFER_SIZES          },
627
      { o(ARB_gpu_shader_int64),             PIPE_CAP_INT64                            },
628
      { o(ARB_indirect_parameters),          PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS       },
629 630 631
      { o(ARB_instanced_arrays),             PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR  },
      { o(ARB_occlusion_query),              PIPE_CAP_OCCLUSION_QUERY                  },
      { o(ARB_occlusion_query2),             PIPE_CAP_OCCLUSION_QUERY                  },
632
      { o(ARB_pipeline_statistics_query),    PIPE_CAP_QUERY_PIPELINE_STATISTICS        },
633
      { o(ARB_point_sprite),                 PIPE_CAP_POINT_SPRITE                     },
634
      { o(ARB_polygon_offset_clamp),         PIPE_CAP_POLYGON_OFFSET_CLAMP             },
635
      { o(ARB_post_depth_coverage),          PIPE_CAP_POST_DEPTH_COVERAGE              },
636
      { o(ARB_query_buffer_object),          PIPE_CAP_QUERY_BUFFER_OBJECT              },
637
      { o(ARB_robust_buffer_access_behavior), PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR   },
638
      { o(ARB_sample_shading),               PIPE_CAP_SAMPLE_SHADING                   },
639
      { o(ARB_seamless_cube_map),            PIPE_CAP_SEAMLESS_CUBE_MAP                },
640
      { o(ARB_shader_ballot),                PIPE_CAP_TGSI_BALLOT                      },
641
      { o(ARB_shader_clock),                 PIPE_CAP_TGSI_CLOCK                       },
642
      { o(ARB_shader_draw_parameters),       PIPE_CAP_DRAW_PARAMETERS                  },
643
      { o(ARB_shader_group_vote),            PIPE_CAP_TGSI_VOTE                        },
644
      { o(ARB_shader_stencil_export),        PIPE_CAP_SHADER_STENCIL_EXPORT            },
645
      { o(ARB_shader_texture_image_samples), PIPE_CAP_TGSI_TXQS                        },
646
      { o(ARB_shader_texture_lod),           PIPE_CAP_SM3                              },
647
      { o(ARB_sparse_buffer),                PIPE_CAP_SPARSE_BUFFER_PAGE_SIZE          },
648
      { o(ARB_texture_buffer_object),        PIPE_CAP_TEXTURE_BUFFER_OBJECTS           },
649
      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   },
650
      { o(ARB_texture_gather),               PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS    },
651
      { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
652
      { o(ARB_texture_multisample),          PIPE_CAP_TEXTURE_MULTISAMPLE              },
653
      { o(ARB_texture_non_power_of_two),     PIPE_CAP_NPOT_TEXTURES                    },
654 655
      { o(ARB_texture_query_lod),            PIPE_CAP_TEXTURE_QUERY_LOD                },
      { o(ARB_texture_view),                 PIPE_CAP_SAMPLER_VIEW_TARGET              },
656
      { o(ARB_timer_query),                  PIPE_CAP_QUERY_TIMESTAMP                  },
657
      { o(ARB_transform_feedback2),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
658
      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS },
659
      { o(ARB_transform_feedback_overflow_query), PIPE_CAP_QUERY_SO_OVERFLOW           },
660

661 662
      { o(KHR_blend_equation_advanced),      PIPE_CAP_TGSI_FS_FBFETCH                  },

663
      { o(EXT_blend_equation_separate),      PIPE_CAP_BLEND_EQUATION_SEPARATE          },
664
      { o(EXT_depth_bounds_test),            PIPE_CAP_DEPTH_BOUNDS_TEST                },
665
      { o(EXT_draw_buffers2),                PIPE_CAP_INDEP_BLEND_ENABLE               },
666 667
      { o(EXT_memory_object),                PIPE_CAP_MEMOBJ                           },
      { o(EXT_memory_object_fd),             PIPE_CAP_MEMOBJ                           },
668 669
      { o(EXT_semaphore),                    PIPE_CAP_FENCE_SIGNAL                     },
      { o(EXT_semaphore_fd),                 PIPE_CAP_FENCE_SIGNAL                     },
670 671 672 673 674
      { o(EXT_texture_array),                PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS         },
      { o(EXT_texture_filter_anisotropic),   PIPE_CAP_ANISOTROPIC_FILTER               },
      { o(EXT_texture_mirror_clamp),         PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
      { o(EXT_texture_swizzle),              PIPE_CAP_TEXTURE_SWIZZLE                  },
      { o(EXT_transform_feedback),           PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS        },
675
      { o(EXT_window_rectangles),            PIPE_CAP_MAX_WINDOW_RECTANGLES            },
676

677
      { o(AMD_pinned_memory),                PIPE_CAP_RESOURCE_FROM_USER_MEMORY        },
678
      { o(ATI_meminfo),                      PIPE_CAP_QUERY_MEMORY_INFO                },
679 680
      { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE    },
      { o(ATI_texture_mirror_once),          PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
681
      { o(MESA_tile_raster_order),           PIPE_CAP_TILE_RASTER_ORDER                },
682
      { o(NV_conditional_render),            PIPE_CAP_CONDITIONAL_RENDER               },
683
      { o(NV_fill_rectangle),                PIPE_CAP_POLYGON_MODE_FILL_RECTANGLE      },
684
      { o(NV_primitive_restart),             PIPE_CAP_PRIMITIVE_RESTART                },
685
      { o(NV_texture_barrier),               PIPE_CAP_TEXTURE_BARRIER                  },
686
      { o(NVX_gpu_memory_info),              PIPE_CAP_QUERY_MEMORY_INFO                },
687 688
      /* GL_NV_point_sprite is not supported by gallium because we don't
       * support the GL_POINT_SPRITE_R_MODE_NV option. */
689

690
      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
691 692
      { o(OES_texture_float_linear),         PIPE_CAP_TEXTURE_FLOAT_LINEAR             },
      { o(OES_texture_half_float_linear),    PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR        },
693
   };
694

695 696 697 698 699 700
   /* Required: render target and sampler support */
   static const struct st_extension_format_mapping rendertarget_mapping[] = {
      { { o(ARB_texture_float) },
        { PIPE_FORMAT_R32G32B32A32_FLOAT,
          PIPE_FORMAT_R16G16B16A16_FLOAT } },

701 702 703 704 705 706
      { { o(OES_texture_float) },
        { PIPE_FORMAT_R32G32B32A32_FLOAT } },

      { { o(OES_texture_half_float) },
        { PIPE_FORMAT_R16G16B16A16_FLOAT } },

707
      { { o(ARB_texture_rgb10_a2ui) },
708 709 710
        { PIPE_FORMAT_R10G10B10A2_UINT,
          PIPE_FORMAT_B10G10R10A2_UINT },
         GL_TRUE }, /* at least one format must be supported */
711 712 713

      { { o(EXT_framebuffer_sRGB) },
        { PIPE_FORMAT_A8B8G8R8_SRGB,
714 715
          PIPE_FORMAT_B8G8R8A8_SRGB,
          PIPE_FORMAT_R8G8B8A8_SRGB },
716 717 718 719 720 721 722 723
         GL_TRUE }, /* at least one format must be supported */

      { { o(EXT_packed_float) },
        { PIPE_FORMAT_R11G11B10_FLOAT } },

      { { o(EXT_texture_integer) },
        { PIPE_FORMAT_R32G32B32A32_UINT,
          PIPE_FORMAT_R32G32B32A32_SINT } },
724 725 726 727

      { { o(ARB_texture_rg) },
        { PIPE_FORMAT_R8_UNORM,
          PIPE_FORMAT_R8G8_UNORM } },
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751
   };

   /* Required: depth stencil and sampler support */
   static const struct st_extension_format_mapping depthstencil_mapping[] = {
      { { o(ARB_depth_buffer_float) },
        { PIPE_FORMAT_Z32_FLOAT,
          PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } },
   };

   /* Required: sampler support */
   static const struct st_extension_format_mapping texture_mapping[] = {
      { { o(ARB_texture_compression_rgtc) },
        { PIPE_FORMAT_RGTC1_UNORM,
          PIPE_FORMAT_RGTC1_SNORM,
          PIPE_FORMAT_RGTC2_UNORM,
          PIPE_FORMAT_RGTC2_SNORM } },

      { { o(EXT_texture_compression_latc) },
        { PIPE_FORMAT_LATC1_UNORM,
          PIPE_FORMAT_LATC1_SNORM,
          PIPE_FORMAT_LATC2_UNORM,
          PIPE_FORMAT_LATC2_SNORM } },

      { { o(EXT_texture_compression_s3tc),
752
          o(ANGLE_texture_compression_dxt) },
753 754 755 756 757
        { PIPE_FORMAT_DXT1_RGB,
          PIPE_FORMAT_DXT1_RGBA,
          PIPE_FORMAT_DXT3_RGBA,
          PIPE_FORMAT_DXT5_RGBA } },

758 759 760 761 762 763
      { { o(ARB_texture_compression_bptc) },
        { PIPE_FORMAT_BPTC_RGBA_UNORM,
          PIPE_FORMAT_BPTC_SRGBA,
          PIPE_FORMAT_BPTC_RGB_FLOAT,
          PIPE_FORMAT_BPTC_RGB_UFLOAT } },

Ilia Mirkin's avatar
Ilia Mirkin committed
764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793
      { { o(KHR_texture_compression_astc_ldr) },
        { PIPE_FORMAT_ASTC_4x4,
          PIPE_FORMAT_ASTC_5x4,
          PIPE_FORMAT_ASTC_5x5,
          PIPE_FORMAT_ASTC_6x5,
          PIPE_FORMAT_ASTC_6x6,
          PIPE_FORMAT_ASTC_8x5,
          PIPE_FORMAT_ASTC_8x6,
          PIPE_FORMAT_ASTC_8x8,
          PIPE_FORMAT_ASTC_10x5,
          PIPE_FORMAT_ASTC_10x6,
          PIPE_FORMAT_ASTC_10x8,
          PIPE_FORMAT_ASTC_10x10,
          PIPE_FORMAT_ASTC_12x10,
          PIPE_FORMAT_ASTC_12x12,
          PIPE_FORMAT_ASTC_4x4_SRGB,
          PIPE_FORMAT_ASTC_5x4_SRGB,
          PIPE_FORMAT_ASTC_5x5_SRGB,
          PIPE_FORMAT_ASTC_6x5_SRGB,
          PIPE_FORMAT_ASTC_6x6_SRGB,
          PIPE_FORMAT_ASTC_8x5_SRGB,
          PIPE_FORMAT_ASTC_8x6_SRGB,
          PIPE_FORMAT_ASTC_8x8_SRGB,
          PIPE_FORMAT_ASTC_10x5_SRGB,
          PIPE_FORMAT_ASTC_10x6_SRGB,
          PIPE_FORMAT_ASTC_10x8_SRGB,
          PIPE_FORMAT_ASTC_10x10_SRGB,
          PIPE_FORMAT_ASTC_12x10_SRGB,
          PIPE_FORMAT_ASTC_12x12_SRGB } },

794 795 796 797 798 799 800 801 802 803 804 805
      { { o(EXT_texture_shared_exponent) },
        { PIPE_FORMAT_R9G9B9E5_FLOAT } },

      { { o(EXT_texture_snorm) },
        { PIPE_FORMAT_R8G8B8A8_SNORM } },

      { { o(EXT_texture_sRGB),
          o(EXT_texture_sRGB_decode) },
        { PIPE_FORMAT_A8B8G8R8_SRGB,
          PIPE_FORMAT_B8G8R8A8_SRGB },
        GL_TRUE }, /* at least one format must be supported */

806 807 808 809 810
      { { o(EXT_texture_type_2_10_10_10_REV) },
        { PIPE_FORMAT_R10G10B10A2_UNORM,
          PIPE_FORMAT_B10G10R10A2_UNORM },
         GL_TRUE }, /* at least one format must be supported */

811 812 813 814 815 816 817 818 819
      { { o(ATI_texture_compression_3dc) },
        { PIPE_FORMAT_LATC2_UNORM } },

      { { o(MESA_ycbcr_texture) },
        { PIPE_FORMAT_UYVY,
          PIPE_FORMAT_YUYV },
        GL_TRUE }, /* at least one format must be supported */

      { { o(OES_compressed_ETC1_RGB8_texture) },
820 821 822
        { PIPE_FORMAT_ETC1_RGB8,
          PIPE_FORMAT_R8G8B8A8_UNORM },
        GL_TRUE }, /* at least one format must be supported */
823

824 825
      { { o(ARB_stencil_texturing),
          o(ARB_texture_stencil8) },
826 827 828
        { PIPE_FORMAT_X24S8_UINT,
          PIPE_FORMAT_S8X24_UINT },
        GL_TRUE }, /* at least one format must be supported */
829 830 831 832
   };

   /* Required: vertex fetch support. */
   static const struct st_extension_format_mapping vertex_mapping[] = {
833 834
      { { o(EXT_vertex_array_bgra) },
        { PIPE_FORMAT_B8G8R8A8_UNORM } },
835 836 837 838 839 840 841 842 843
      { { o(ARB_vertex_type_2_10_10_10_rev) },
        { PIPE_FORMAT_R10G10B10A2_UNORM,
          PIPE_FORMAT_B10G10R10A2_UNORM,
          PIPE_FORMAT_R10G10B10A2_SNORM,
          PIPE_FORMAT_B10G10R10A2_SNORM,
          PIPE_FORMAT_R10G10B10A2_USCALED,
          PIPE_FORMAT_B10G10R10A2_USCALED,
          PIPE_FORMAT_R10G10B10A2_SSCALED,
          PIPE_FORMAT_B10G10R10A2_SSCALED } },
844 845
      { { o(ARB_vertex_type_10f_11f_11f_rev) },
        { PIPE_FORMAT_R11G11B10_FLOAT } },
846 847
   };

848 849 850 851 852 853 854 855
   static const struct st_extension_format_mapping tbo_rgb32[] = {
      { {o(ARB_texture_buffer_object_rgb32) },
        { PIPE_FORMAT_R32G32B32_FLOAT,
          PIPE_FORMAT_R32G32B32_UINT,
          PIPE_FORMAT_R32G32B32_SINT,
        } },
   };

856 857 858
   /*
    * Extensions that are supported by all Gallium drivers:
    */
859
   extensions->ARB_ES2_compatibility = GL_TRUE;
860
   extensions->ARB_depth_texture = GL_TRUE;
861 862 863 864 865
   extensions->ARB_draw_elements_base_vertex = GL_TRUE;
   extensions->ARB_explicit_attrib_location = GL_TRUE;
   extensions->ARB_explicit_uniform_location = GL_TRUE;
   extensions->ARB_fragment_coord_conventions = GL_TRUE;
   extensions->ARB_fragment_program = GL_TRUE;
866
   extensions->ARB_fragment_program_shadow = GL_TRUE;
867 868 869
   extensions->ARB_fragment_shader = GL_TRUE;
   extensions->ARB_half_float_vertex = GL_TRUE;
   extensions->ARB_internalformat_query = GL_TRUE;
870
   extensions->ARB_internalformat_query2 = GL_TRUE;
871
   extensions->ARB_map_buffer_range = GL_TRUE;
872
   extensions->ARB_shadow = GL_TRUE;
873 874
   extensions->ARB_sync = GL_TRUE;
   extensions->ARB_texture_border_clamp = GL_TRUE;
875 876 877 878 879 880 881 882 883 884 885 886 887 888
   extensions->ARB_texture_cube_map = GL_TRUE;
   extensions->ARB_texture_env_combine = GL_TRUE;
   extensions->ARB_texture_env_crossbar = GL_TRUE;
   extensions->ARB_texture_env_dot3 = GL_TRUE;
   extensions->ARB_vertex_program = GL_TRUE;
   extensions->ARB_vertex_shader = GL_TRUE;

   extensions->EXT_blend_color = GL_TRUE;
   extensions->EXT_blend_func_separate = GL_TRUE;
   extensions->EXT_blend_minmax = GL_TRUE;
   extensions->EXT_gpu_program_parameters = GL_TRUE;
   extensions->EXT_pixel_buffer_object = GL_TRUE;
   extensions->EXT_point_parameters = GL_TRUE;
   extensions->EXT_provoking_vertex = GL_TRUE;
889
   extensions->EXT_stencil_two_side = GL_TRUE;
890 891
   extensions->EXT_texture_env_dot3 = GL_TRUE;

892
   extensions->ATI_fragment_shader = GL_TRUE;
893
   extensions->ATI_separate_stencil = GL_TRUE;
894 895 896 897 898 899 900 901 902 903 904
   extensions->ATI_texture_env_combine3 = GL_TRUE;

   extensions->MESA_pack_invert = GL_TRUE;

   extensions->NV_fog_distance = GL_TRUE;
   extensions->NV_texture_env_combine4 = GL_TRUE;
   extensions->NV_texture_rectangle = GL_TRUE;

   extensions->OES_EGL_image = GL_TRUE;
   extensions->OES_EGL_image_external = GL_TRUE;
   extensions->OES_draw_texture = GL_TRUE;
905

906
   /* Expose the extensions which directly correspond to gallium caps. */
907
   for (i = 0; i < ARRAY_SIZE(cap_mapping); i++) {
908
      if (screen->get_param(screen, cap_mapping[i].cap)) {
909
         extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
910 911 912
      }
   }

913
   /* Expose the extensions which directly correspond to gallium formats. */
914
   init_format_extensions(screen, extensions, rendertarget_mapping,
915
                          ARRAY_SIZE(rendertarget_mapping), PIPE_TEXTURE_2D,
916
                          PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
917
   init_format_extensions(screen, extensions, depthstencil_mapping,
918
                          ARRAY_SIZE(depthstencil_mapping), PIPE_TEXTURE_2D,
919
                          PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
920
   init_format_extensions(screen, extensions, texture_mapping,
921
                          ARRAY_SIZE(texture_mapping), PIPE_TEXTURE_2D,
922 923
                          PIPE_BIND_SAMPLER_VIEW);
   init_format_extensions(screen, extensions, vertex_mapping,
924
                          ARRAY_SIZE(vertex_mapping), PIPE_BUFFER,
925
                          PIPE_BIND_VERTEX_BUFFER);
926

927 928
   /* Figure out GLSL support and set GLSLVersion to it. */
   consts->GLSLVersion = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
929

930
   _mesa_override_glsl_version(consts);
931

932 933 934
   if (options->force_glsl_version > 0 &&
       options->force_glsl_version <= consts->GLSLVersion) {
      consts->ForceGLSLVersion = options->force_glsl_version;
935 936
   }

937 938
   consts->AllowHigherCompatVersion = options->allow_higher_compat_version;

939 940
   consts->ForceGLSLAbsSqrt = options->force_glsl_abs_sqrt;

941 942
   consts->AllowGLSLBuiltinVariableRedeclaration = options->allow_glsl_builtin_variable_redeclaration;

943 944
   consts->dri_config_options_sha1 = options->config_options_sha1;

945 946
   consts->AllowGLSLCrossStageInterpolationMismatch = options->allow_glsl_cross_stage_interpolation_mismatch;

947
   if (consts->GLSLVersion >= 400)
948
      extensions->ARB_gpu_shader5 = GL_TRUE;
949
   if (consts->GLSLVersion >= 410)
950
      extensions->ARB_shader_precision = GL_TRUE;
951

952 953
   /* This extension needs full OpenGL 3.2, but we don't know if that's
    * supported at this point. Only check the GLSL version. */
954
   if (consts->GLSLVersion >= 150 &&
955
       screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
956
      extensions->AMD_vertex_shader_layer = GL_TRUE;
957 958
   }

959
   if (consts->GLSLVersion >= 140) {
960
      if (screen->get_param(screen, PIPE_CAP_TGSI_ARRAY_COMPONENTS))
961 962 963
         extensions->ARB_enhanced_layouts = GL_TRUE;
   }

964 965 966
   if (consts->GLSLVersion >= 130) {
      consts->NativeIntegers = GL_TRUE;
      consts->MaxClipPlanes = 8;
967

968 969 970 971
      if (screen->get_param(screen, PIPE_CAP_VERTEXID_NOBASE)) {
         consts->VertexID_is_zero_based = GL_TRUE;
      }

972
      /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
973 974 975 976 977 978 979 980
      extensions->ARB_conservative_depth = GL_TRUE;
      extensions->ARB_shading_language_packing = GL_TRUE;
      extensions->OES_depth_texture_cube_map = GL_TRUE;
      extensions->ARB_shading_language_420pack = GL_TRUE;
      extensions->ARB_texture_query_levels = GL_TRUE;

      if (!options->disable_shader_bit_encoding) {
         extensions->ARB_shader_bit_encoding = GL_TRUE;
981
      }
982

983
      extensions->EXT_shader_integer_mix = GL_TRUE;
984
      extensions->ARB_arrays_of_arrays = GL_TRUE;
985
      extensions->MESA_shader_integer_functions = GL_TRUE;
986 987 988 989 990 991
   } else {
      /* Optional integer support for GLSL 1.2. */
      if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
                                   PIPE_SHADER_CAP_INTEGERS) &&
          screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
                                   PIPE_SHADER_CAP_INTEGERS)) {
992
         consts->NativeIntegers = GL_TRUE;
993