st_extensions.c 38.1 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 29 30 31
 * 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.
 * 
 **************************************************************************/

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

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
36
#include "pipe/p_screen.h"
37
#include "util/u_math.h"
38 39 40

#include "st_context.h"
#include "st_extensions.h"
41
#include "st_format.h"
42

43 44 45 46 47 48

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

49
static unsigned _min(unsigned a, unsigned b)
50 51 52 53
{
   return (a < b) ? a : b;
}

54
static float _maxf(float a, float b)
55 56 57 58
{
   return (a > b) ? a : b;
}

59
static int _clamp(int a, int min, int max)
60
{
61 62 63 64 65 66
   if (a < min)
      return min;
   else if (a > max)
      return max;
   else
      return a;
67 68 69
}


70 71 72 73
/**
 * Query driver to get implementation limits.
 * Note that we have to limit/clamp against Mesa's internal limits too.
 */
74 75
void st_init_limits(struct pipe_screen *screen,
                    struct gl_constants *c, struct gl_extensions *extensions)
76
{
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 96 97
   c->MaxArrayTextureLayers
      = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);

98 99 100 101 102 103 104 105
   /* 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;

106 107 108
   c->MaxDrawBuffers = c->MaxColorAttachments =
      _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
             1, MAX_DRAW_BUFFERS);
109

110 111 112 113
   c->MaxDualSourceDrawBuffers
      = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
              0, MAX_DRAW_BUFFERS);

114
   c->MaxLineWidth
115 116
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_LINE_WIDTH));
117
   c->MaxLineWidthAA
118 119
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_LINE_WIDTH_AA));
120 121

   c->MaxPointSize
122 123
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_POINT_WIDTH));
124
   c->MaxPointSizeAA
125 126
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_POINT_WIDTH_AA));
127

128 129 130 131 132
   /* 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;
133 134

   c->MaxTextureMaxAnisotropy
135 136
      = _maxf(2.0f, screen->get_paramf(screen,
                                 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
137 138

   c->MaxTextureLodBias
139
      = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
140

141 142
   c->QuadsFollowProvokingVertexConvention = screen->get_param(
      screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
143

144 145
   c->MaxUniformBlockSize =
      screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
146
                               PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE);
147 148 149 150
   if (c->MaxUniformBlockSize < 16384) {
      can_ubo = FALSE;
   }

151 152
   for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
      struct gl_shader_compiler_options *options;
153
      struct gl_program_constants *pc;
154 155

      switch (sh) {
156
      case PIPE_SHADER_FRAGMENT:
157
         pc = &c->Program[MESA_SHADER_FRAGMENT];
158
         options = &c->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
159 160
         break;
      case PIPE_SHADER_VERTEX:
161
         pc = &c->Program[MESA_SHADER_VERTEX];
162
         options = &c->ShaderCompilerOptions[MESA_SHADER_VERTEX];
163 164
         break;
      case PIPE_SHADER_GEOMETRY:
165
         pc = &c->Program[MESA_SHADER_GEOMETRY];
166
         options = &c->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
167
         break;
168 169 170 171 172 173 174 175
      case PIPE_SHADER_TESS_CTRL:
         pc = &c->Program[MESA_SHADER_TESS_CTRL];
         options = &c->ShaderCompilerOptions[MESA_SHADER_TESS_CTRL];
         break;
      case PIPE_SHADER_TESS_EVAL:
         pc = &c->Program[MESA_SHADER_TESS_EVAL];
         options = &c->ShaderCompilerOptions[MESA_SHADER_TESS_EVAL];
         break;
176
      default:
177
         /* compute shader, etc. */
178
         continue;
179 180
      }

181 182 183 184 185
      pc->MaxTextureImageUnits =
         _min(screen->get_shader_param(screen, sh,
                                       PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
              MAX_TEXTURE_IMAGE_UNITS);

186 187 188 189 190 191 192 193 194 195 196 197 198
      pc->MaxInstructions    = pc->MaxNativeInstructions    =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS);
      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         =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS);
      pc->MaxTemps           = pc->MaxNativeTemps           =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS);
      pc->MaxAddressRegs     = pc->MaxNativeAddressRegs     =
199
         sh == PIPE_SHADER_VERTEX ? 1 : 0;
200
      pc->MaxParameters      = pc->MaxNativeParameters      =
201 202
         screen->get_shader_param(screen, sh,
                   PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE) / sizeof(float[4]);
203 204 205 206
      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;
207 208 209 210 211 212 213

      pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS);

      pc->MaxUniformBlocks =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONST_BUFFERS);
      if (pc->MaxUniformBlocks)
         pc->MaxUniformBlocks -= 1; /* The first one is for ordinary uniforms. */
214
      pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
215 216 217 218

      pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
                                          c->MaxUniformBlockSize / 4 *
                                          pc->MaxUniformBlocks);
219

220 221 222
      /* Gallium doesn't really care about local vs. env parameters so use the
       * same limits.
       */
223 224
      pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
      pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
225

226 227
      options->EmitNoNoise = TRUE;

228
      /* TODO: make these more fine-grained if anyone needs it */
229
      options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
230 231 232
      options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
      options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
      options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES);
233

234
      options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
235

236
      options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
237
                                        PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
238
      options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
239
                                        PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
240
      options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
241
                                        PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
242
      options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
243 244
                                        PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);

245 246
      if (pc->MaxNativeInstructions &&
          (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
247 248 249
         can_ubo = FALSE;
      }

Brian Paul's avatar
Brian Paul committed
250
      if (options->EmitNoLoops)
251
         options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
252

253
      options->LowerClipDistance = true;
254
   }
255

256 257
   c->LowerTessLevel = true;

258 259
   c->MaxCombinedTextureImageUnits =
         _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
260 261
              c->Program[MESA_SHADER_TESS_CTRL].MaxTextureImageUnits +
              c->Program[MESA_SHADER_TESS_EVAL].MaxTextureImageUnits +
262 263 264 265
              c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
              c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
              MAX_COMBINED_TEXTURE_IMAGE_UNITS);

266 267
   /* This depends on program constants. */
   c->MaxTextureCoordUnits
268
      = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);
269

270
   c->MaxTextureUnits = _min(c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits, c->MaxTextureCoordUnits);
271

272
   c->Program[MESA_SHADER_VERTEX].MaxAttribs = MIN2(c->Program[MESA_SHADER_VERTEX].MaxAttribs, 16);
273

274 275 276 277
   /* 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);
278
   c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
279 280
   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);
281 282 283
   c->MaxTessPatchComponents =
      MAX2(screen->get_param(screen, PIPE_CAP_MAX_SHADER_PATCH_VARYINGS),
           MAX_VARYING) * 4;
284

285 286 287
   c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
   c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);

288
   c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
289 290 291
   c->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
   c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);

292
   c->MaxTransformFeedbackBuffers =
293
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
294
   c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
295 296 297 298
   c->MaxTransformFeedbackSeparateComponents =
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS);
   c->MaxTransformFeedbackInterleavedComponents =
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS);
299 300 301 302 303
   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);
304

305 306 307
   c->MaxVertexAttribStride
      = screen->get_param(screen, PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE);

308
   c->StripTextureBorder = GL_TRUE;
309 310 311 312

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

313
   if (can_ubo) {
314
      extensions->ARB_uniform_buffer_object = GL_TRUE;
315
      c->UniformBufferOffsetAlignment =
316
         screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
317
      c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
318
         c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
319 320
         c->Program[MESA_SHADER_TESS_CTRL].MaxUniformBlocks +
         c->Program[MESA_SHADER_TESS_EVAL].MaxUniformBlocks +
321 322
         c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
         c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
323
      assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
324
   }
325 326 327
}


328 329 330 331 332 333 334 335 336 337 338 339
/**
 * 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;
};

340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355
struct st_extension_format_mapping {
   int extension_offset[2];
   enum pipe_format format[8];

   /* 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.
 */
356 357 358 359 360 361 362
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)
363
{
364
   GLboolean *extension_table = (GLboolean *) extensions;
365 366
   unsigned i;
   int j;
367 368
   int num_formats = ARRAY_SIZE(mapping->format);
   int num_ext = ARRAY_SIZE(mapping->extension_offset);
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387

   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++)
388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
         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,
                            enum pipe_format *formats,
                            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;
         }
      }
413
   }
414
   return 0;
415
}
416

417

418
/**
419 420 421 422 423
 * 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.
424
 */
425 426 427 428 429
void st_init_extensions(struct pipe_screen *screen,
                        struct gl_constants *consts,
                        struct gl_extensions *extensions,
                        struct st_config_options *options,
                        boolean has_lib_dxtc)
430
{
431 432
   unsigned i;
   int glsl_feature_level;
433
   GLboolean *extension_table = (GLboolean *) extensions;
434 435

   static const struct st_extension_cap_mapping cap_mapping[] = {
436
      { o(ARB_base_instance),                PIPE_CAP_START_INSTANCE                   },
437
      { o(ARB_buffer_storage),               PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT },
438 439 440 441 442 443 444 445
      { o(ARB_depth_clamp),                  PIPE_CAP_DEPTH_CLIP_DISABLE               },
      { o(ARB_depth_texture),                PIPE_CAP_TEXTURE_SHADOW_MAP               },
      { o(ARB_draw_buffers_blend),           PIPE_CAP_INDEP_BLEND_FUNC                 },
      { o(ARB_draw_instanced),               PIPE_CAP_TGSI_INSTANCEID                  },
      { o(ARB_fragment_program_shadow),      PIPE_CAP_TEXTURE_SHADOW_MAP               },
      { 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                  },
446
      { o(ARB_pipeline_statistics_query),    PIPE_CAP_QUERY_PIPELINE_STATISTICS        },
447 448 449 450 451
      { o(ARB_point_sprite),                 PIPE_CAP_POINT_SPRITE                     },
      { o(ARB_seamless_cube_map),            PIPE_CAP_SEAMLESS_CUBE_MAP                },
      { o(ARB_shader_stencil_export),        PIPE_CAP_SHADER_STENCIL_EXPORT            },
      { o(ARB_shader_texture_lod),           PIPE_CAP_SM3                              },
      { o(ARB_shadow),                       PIPE_CAP_TEXTURE_SHADOW_MAP               },
452
      { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
453
      { o(ARB_texture_non_power_of_two),     PIPE_CAP_NPOT_TEXTURES                    },
454
      { o(ARB_timer_query),                  PIPE_CAP_QUERY_TIMESTAMP                  },
455
      { o(ARB_transform_feedback2),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
456
      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
457 458 459 460 461 462 463 464 465 466

      { o(EXT_blend_equation_separate),      PIPE_CAP_BLEND_EQUATION_SEPARATE          },
      { o(EXT_draw_buffers2),                PIPE_CAP_INDEP_BLEND_ENABLE               },
      { o(EXT_stencil_two_side),             PIPE_CAP_TWO_SIDED_STENCIL                },
      { 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        },

467
      { o(AMD_pinned_memory),                PIPE_CAP_RESOURCE_FROM_USER_MEMORY        },
468 469 470 471 472 473 474
      { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE    },
      { o(ATI_separate_stencil),             PIPE_CAP_TWO_SIDED_STENCIL                },
      { o(ATI_texture_mirror_once),          PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
      { o(NV_conditional_render),            PIPE_CAP_CONDITIONAL_RENDER               },
      { o(NV_texture_barrier),               PIPE_CAP_TEXTURE_BARRIER                  },
      /* GL_NV_point_sprite is not supported by gallium because we don't
       * support the GL_POINT_SPRITE_R_MODE_NV option. */
475

476
      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
477 478
      { o(OES_texture_float_linear),         PIPE_CAP_TEXTURE_FLOAT_LINEAR             },
      { o(OES_texture_half_float_linear),    PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR        },
479
      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   },
480
      { o(ARB_texture_multisample),          PIPE_CAP_TEXTURE_MULTISAMPLE              },
481 482
      { o(ARB_texture_query_lod),            PIPE_CAP_TEXTURE_QUERY_LOD                },
      { o(ARB_sample_shading),               PIPE_CAP_SAMPLE_SHADING                   },
483 484
      { o(ARB_draw_indirect),                PIPE_CAP_DRAW_INDIRECT                    },
      { o(ARB_derivative_control),           PIPE_CAP_TGSI_FS_FINE_DERIVATIVE          },
485
      { o(ARB_conditional_render_inverted),  PIPE_CAP_CONDITIONAL_RENDER_INVERTED      },
486
      { o(ARB_texture_view),                 PIPE_CAP_SAMPLER_VIEW_TARGET              },
487
      { o(ARB_clip_control),                 PIPE_CAP_CLIP_HALFZ                       },
488
      { o(EXT_polygon_offset_clamp),         PIPE_CAP_POLYGON_OFFSET_CLAMP             },
489
   };
490

491 492 493 494 495 496
   /* 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 } },

497 498 499 500 501 502
      { { o(OES_texture_float) },
        { PIPE_FORMAT_R32G32B32A32_FLOAT } },

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

503
      { { o(ARB_texture_rgb10_a2ui) },
504 505 506
        { PIPE_FORMAT_R10G10B10A2_UINT,
          PIPE_FORMAT_B10G10R10A2_UINT },
         GL_TRUE }, /* at least one format must be supported */
507 508 509 510 511 512 513 514 515 516 517 518

      { { o(EXT_framebuffer_sRGB) },
        { PIPE_FORMAT_A8B8G8R8_SRGB,
          PIPE_FORMAT_B8G8R8A8_SRGB },
         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 } },
519 520 521 522

      { { o(ARB_texture_rg) },
        { PIPE_FORMAT_R8_UNORM,
          PIPE_FORMAT_R8G8_UNORM } },
523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546
   };

   /* 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),
547
          o(ANGLE_texture_compression_dxt) },
548 549 550 551 552
        { PIPE_FORMAT_DXT1_RGB,
          PIPE_FORMAT_DXT1_RGBA,
          PIPE_FORMAT_DXT3_RGBA,
          PIPE_FORMAT_DXT5_RGBA } },

553 554 555 556 557 558
      { { o(ARB_texture_compression_bptc) },
        { PIPE_FORMAT_BPTC_RGBA_UNORM,
          PIPE_FORMAT_BPTC_SRGBA,
          PIPE_FORMAT_BPTC_RGB_FLOAT,
          PIPE_FORMAT_BPTC_RGB_UFLOAT } },

559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579
      { { 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 */

      { { 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) },
580 581 582
        { PIPE_FORMAT_ETC1_RGB8,
          PIPE_FORMAT_R8G8B8A8_UNORM },
        GL_TRUE }, /* at least one format must be supported */
583 584 585 586 587

      { { o(ARB_stencil_texturing) },
        { PIPE_FORMAT_X24S8_UINT,
          PIPE_FORMAT_S8X24_UINT },
        GL_TRUE }, /* at least one format must be supported */
588 589 590 591 592 593 594 595 596 597 598 599 600
   };

   /* Required: vertex fetch support. */
   static const struct st_extension_format_mapping vertex_mapping[] = {
      { { 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 } },
601 602
      { { o(ARB_vertex_type_10f_11f_11f_rev) },
        { PIPE_FORMAT_R11G11B10_FLOAT } },
603 604
   };

605 606 607 608 609 610 611 612
   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,
        } },
   };

613 614 615
   /*
    * Extensions that are supported by all Gallium drivers:
    */
616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655
   extensions->ARB_ES2_compatibility = GL_TRUE;
   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;
   extensions->ARB_fragment_shader = GL_TRUE;
   extensions->ARB_half_float_vertex = GL_TRUE;
   extensions->ARB_internalformat_query = GL_TRUE;
   extensions->ARB_map_buffer_range = GL_TRUE;
   extensions->ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
   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;

   extensions->EXT_texture_env_dot3 = GL_TRUE;
   extensions->EXT_vertex_array_bgra = GL_TRUE;

   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;
656

657
   /* Expose the extensions which directly correspond to gallium caps. */
658
   for (i = 0; i < ARRAY_SIZE(cap_mapping); i++) {
659
      if (screen->get_param(screen, cap_mapping[i].cap)) {
660
         extension_table[cap_mapping[i].extension_offset] = GL_TRUE;
661 662 663
      }
   }

664
   /* Expose the extensions which directly correspond to gallium formats. */
665
   init_format_extensions(screen, extensions, rendertarget_mapping,
666
                          ARRAY_SIZE(rendertarget_mapping), PIPE_TEXTURE_2D,
667
                          PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
668
   init_format_extensions(screen, extensions, depthstencil_mapping,
669
                          ARRAY_SIZE(depthstencil_mapping), PIPE_TEXTURE_2D,
670
                          PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
671
   init_format_extensions(screen, extensions, texture_mapping,
672
                          ARRAY_SIZE(texture_mapping), PIPE_TEXTURE_2D,
673 674
                          PIPE_BIND_SAMPLER_VIEW);
   init_format_extensions(screen, extensions, vertex_mapping,
675
                          ARRAY_SIZE(vertex_mapping), PIPE_BUFFER,
676
                          PIPE_BIND_VERTEX_BUFFER);
677

678 679 680
   if (extensions->ARB_stencil_texturing)
      extensions->ARB_texture_stencil8 = GL_TRUE;

681 682 683
   /* Figure out GLSL support. */
   glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);

684
   consts->GLSLVersion = glsl_feature_level;
685 686
   if (glsl_feature_level >= 410)
      consts->GLSLVersion = 410;
687

688
   _mesa_override_glsl_version(consts);
689

690 691 692
   if (options->force_glsl_version > 0 &&
       options->force_glsl_version <= consts->GLSLVersion) {
      consts->ForceGLSLVersion = options->force_glsl_version;
693 694
   }

695 696
   if (glsl_feature_level >= 400)
      extensions->ARB_gpu_shader5 = GL_TRUE;
697 698
   if (glsl_feature_level >= 410)
      extensions->ARB_shader_precision = GL_TRUE;
699

700 701
   /* This extension needs full OpenGL 3.2, but we don't know if that's
    * supported at this point. Only check the GLSL version. */
702
   if (consts->GLSLVersion >= 150 &&
703
       screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
704
      extensions->AMD_vertex_shader_layer = GL_TRUE;
705 706
   }

707 708 709
   if (consts->GLSLVersion >= 130) {
      consts->NativeIntegers = GL_TRUE;
      consts->MaxClipPlanes = 8;
710

711 712 713 714
      if (screen->get_param(screen, PIPE_CAP_VERTEXID_NOBASE)) {
         consts->VertexID_is_zero_based = GL_TRUE;
      }

715
      /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
716 717 718 719 720
      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;
721
      extensions->ARB_shader_subroutine = GL_TRUE;
722 723 724

      if (!options->disable_shader_bit_encoding) {
         extensions->ARB_shader_bit_encoding = GL_TRUE;
725
      }
726

727
      extensions->EXT_shader_integer_mix = GL_TRUE;
728 729 730 731 732 733
   } 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)) {
734
         consts->NativeIntegers = GL_TRUE;
735

736
         extensions->EXT_shader_integer_mix = GL_TRUE;
737
      }
738 739 740

      /* Integer textures make no sense before GLSL 1.30 */
      extensions->EXT_texture_integer = GL_FALSE;
741 742
   }

743
   consts->UniformBooleanTrue = consts->NativeIntegers ? ~0U : fui(1.0f);
744

745
   /* Below are the cases which cannot be moved into tables easily. */
746

747 748 749
   if (!has_lib_dxtc && !options->force_s3tc_enable) {
      extensions->EXT_texture_compression_s3tc = GL_FALSE;
      extensions->ANGLE_texture_compression_dxt = GL_FALSE;
750 751
   }

752 753
   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
                                PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
754
#if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
755
      extensions->ARB_geometry_shader4 = GL_TRUE;
756
#endif
757
   }
Marek Olšák's avatar
Marek Olšák committed
758

759 760 761 762 763
   if (screen->get_shader_param(screen, PIPE_SHADER_TESS_CTRL,
                                PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
      extensions->ARB_tessellation_shader = GL_TRUE;
   }

764 765
   if (screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
      extensions->NV_primitive_restart = GL_TRUE;
766 767
   }

768
   /* ARB_color_buffer_float. */
769
   if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
770
      extensions->ARB_color_buffer_float = GL_TRUE;
771
   }
772

Marek Olšák's avatar
Marek Olšák committed
773
   if (screen->fence_finish) {
774
      extensions->ARB_sync = GL_TRUE;
Marek Olšák's avatar
Marek Olšák committed
775
   }
776

777
   /* Maximum sample count. */
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
   {
      enum pipe_format color_formats[] = {
         PIPE_FORMAT_R8G8B8A8_UNORM,
         PIPE_FORMAT_B8G8R8A8_UNORM,
         PIPE_FORMAT_A8R8G8B8_UNORM,
         PIPE_FORMAT_A8B8G8R8_UNORM,
      };
      enum pipe_format depth_formats[] = {
         PIPE_FORMAT_Z16_UNORM,
         PIPE_FORMAT_Z24X8_UNORM,
         PIPE_FORMAT_X8Z24_UNORM,
         PIPE_FORMAT_Z32_UNORM,
         PIPE_FORMAT_Z32_FLOAT
      };
      enum pipe_format int_formats[] = {
         PIPE_FORMAT_R8G8B8A8_SINT
      };

      consts->MaxSamples =
797
         get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
798 799 800 801
                                     color_formats, 16,
                                     PIPE_BIND_RENDER_TARGET);

      consts->MaxColorTextureSamples =
802
         get_max_samples_for_formats(screen, ARRAY_SIZE(color_formats),
803 804 805 806
                                     color_formats, consts->MaxSamples,
                                     PIPE_BIND_SAMPLER_VIEW);

      consts->MaxDepthTextureSamples =
807
         get_max_samples_for_formats(screen, ARRAY_SIZE(depth_formats),
808 809 810 811
                                     depth_formats, consts->MaxSamples,
                                     PIPE_BIND_SAMPLER_VIEW);

      consts->MaxIntegerSamples =
812
         get_max_samples_for_formats(screen, ARRAY_SIZE(int_formats),
813 814
                                     int_formats, consts->MaxSamples,
                                     PIPE_BIND_SAMPLER_VIEW);
815
   }
816
   if (consts->MaxSamples == 1) {
817
      /* one sample doesn't really make sense */
818
      consts->MaxSamples = 0;
819
   }
820 821 822
   else if (consts->MaxSamples >= 2) {
      extensions->EXT_framebuffer_multisample = GL_TRUE;
      extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
823
   }
824

825 826 827 828 829
   if (consts->MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
	consts->FakeSWMSAA = GL_TRUE;
        extensions->EXT_framebuffer_multisample = GL_TRUE;
        extensions->EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
        extensions->ARB_texture_multisample = GL_TRUE;
830 831
   }

832 833 834
   if (consts->MaxDualSourceDrawBuffers > 0 &&
       !options->disable_blend_func_extended)
      extensions->ARB_blend_func_extended = GL_TRUE;
835

836 837 838
   if (screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED) ||
       extensions->ARB_timer_query) {
      extensions->EXT_timer_query = GL_TRUE;
839
   }
840

841 842 843
   if (extensions->ARB_transform_feedback2 &&
       extensions->ARB_draw_instanced) {
      extensions->ARB_transform_feedback_instanced = GL_TRUE;
844
   }
845 846
   if (options->force_glsl_extensions_warn)
      consts->ForceGLSLExtensionsWarn = 1;
847

848 849
   if (options->disable_glsl_line_continuations)
      consts->DisableGLSLLineContinuations = 1;
850

851 852
   if (options->allow_glsl_extension_directive_midshader)
      consts->AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
853

854
   consts->MinMapBufferAlignment =
855
      screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
856

857
   if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
858
      extensions->ARB_texture_buffer_object = GL_TRUE;
859

860
      consts->MaxTextureBufferSize =
861 862
         _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
              (1u << 31) - 1);
863
      consts->TextureBufferOffsetAlignment =
864 865
         screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);

866 867
      if (consts->TextureBufferOffsetAlignment)
         extensions->ARB_texture_buffer_range = GL_TRUE;
868

869
      init_format_extensions(screen, extensions, tbo_rgb32,
870
                             ARRAY_SIZE(tbo_rgb32), PIPE_BUFFER,
871
                             PIPE_BIND_SAMPLER_VIEW);
872 873
   }

874
   if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
875
      extensions->ARB_framebuffer_object = GL_TRUE;
876
   }
877 878 879 880 881 882 883 884 885 886 887

   /* Unpacking a varying in the fragment shader costs 1 texture indirection.
    * If the number of available texture indirections is very limited, then we
    * prefer to disable varying packing rather than run the risk of varying
    * packing preventing a shader from running.
    */
   if (screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
                                PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS) <= 8) {
      /* We can't disable varying packing if transform feedback is available,
       * because transform feedback code assumes a packed varying layout.
       */
888 889
      if (!extensions->EXT_transform_feedback)
         consts->DisableVaryingPacking = GL_TRUE;
890
   }
891

892 893 894 895 896 897 898 899
   consts->MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
   if (consts->MaxViewports >= 16) {
      consts->ViewportBounds.Min = -16384.0;
      consts->ViewportBounds.Max = 16384.0;
      extensions->ARB_viewport_array = GL_TRUE;
      extensions->ARB_fragment_layer_viewport = GL_TRUE;
      if (extensions->AMD_vertex_shader_layer)
         extensions->AMD_vertex_shader_viewport_index = GL_TRUE;
900
   }
901

902 903
   if (consts->MaxProgramTextureGatherComponents > 0)
      extensions->ARB_texture_gather = GL_TRUE;
904 905 906 907 908 909

   /* GL_ARB_ES3_compatibility.
    *
    * Assume that ES3 is supported if GLSL 3.30 is supported.
    * (OpenGL 3.3 is a requirement for that extension.)
    */
910
   if (consts->GLSLVersion >= 330 &&
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
       /* Requirements for ETC2 emulation. */
       screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_UNORM,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW) &&
       screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_SRGB,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW) &&
       screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW) &&
       screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW) &&
       screen->is_format_supported(screen, PIPE_FORMAT_R16_SNORM,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW) &&
       screen->is_format_supported(screen, PIPE_FORMAT_R16G16_SNORM,
                                   PIPE_TEXTURE_2D, 0,
                                   PIPE_BIND_SAMPLER_VIEW)) {
930
      extensions->ARB_ES3_compatibility = GL_TRUE;
931
   }
932 933 934 935 936 937 938

   if (screen->get_video_param &&
       screen->get_video_param(screen, PIPE_VIDEO_PROFILE_UNKNOWN,
                               PIPE_VIDEO_ENTRYPOINT_BITSTREAM,
                               PIPE_VIDEO_CAP_SUPPORTS_INTERLACED)) {
      extensions->NV_vdpau_interop = GL_TRUE;
   }
939 940 941 942

   if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX,
                                PIPE_SHADER_CAP_DOUBLES) &&
       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
943
                                PIPE_SHADER_CAP_DOUBLES)) {
944
      extensions->ARB_gpu_shader_fp64 = GL_TRUE;
945 946
      extensions->ARB_vertex_attrib_64bit = GL_TRUE;
   }
947
}