st_extensions.c 33 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 38 39

#include "st_context.h"
#include "st_extensions.h"
40
#include "st_format.h"
41

42 43 44 45 46 47

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

48
static unsigned _min(unsigned a, unsigned b)
49 50 51 52
{
   return (a < b) ? a : b;
}

53
static float _maxf(float a, float b)
54 55 56 57
{
   return (a > b) ? a : b;
}

58
static int _clamp(int a, int min, int max)
59
{
60 61 62 63 64 65
   if (a < min)
      return min;
   else if (a > max)
      return max;
   else
      return a;
66 67 68
}


69 70 71 72
/**
 * Query driver to get implementation limits.
 * Note that we have to limit/clamp against Mesa's internal limits too.
 */
73 74
void st_init_limits(struct st_context *st)
{
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 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
   /* called after _mesa_create_context/_mesa_init_point, fix default user
    * settable max point size up
    */
   st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
131 132 133 134 135
   /* 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;
136 137

   c->MaxTextureMaxAnisotropy
138 139
      = _maxf(2.0f, screen->get_paramf(screen,
                                 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
140 141

   c->MaxTextureLodBias
142
      = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
143

144 145
   c->QuadsFollowProvokingVertexConvention = screen->get_param(
      screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
146

147 148 149 150 151 152 153
   c->MaxUniformBlockSize =
      screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
                               PIPE_SHADER_CAP_MAX_CONSTS) * 16;
   if (c->MaxUniformBlockSize < 16384) {
      can_ubo = FALSE;
   }

154 155
   for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
      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];
162 163
         break;
      case PIPE_SHADER_VERTEX:
164
         pc = &c->Program[MESA_SHADER_VERTEX];
165
         options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX];
166 167
         break;
      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
      }

176 177 178 179 180
      pc->MaxTextureImageUnits =
         _min(screen->get_shader_param(screen, sh,
                                       PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
              MAX_TEXTURE_IMAGE_UNITS);

181 182 183 184 185 186 187 188 189 190 191 192 193
      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     =
194 195
         _min(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS),
              MAX_PROGRAM_ADDRESS_REGS);
196 197 198 199 200 201 202 203 204
      pc->MaxParameters      = pc->MaxNativeParameters      =
         screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS);

      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. */
205
      pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
206 207 208 209

      pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
                                          c->MaxUniformBlockSize / 4 *
                                          pc->MaxUniformBlocks);
210

211 212 213
      /* Gallium doesn't really care about local vs. env parameters so use the
       * same limits.
       */
214 215
      pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
      pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
216

217 218
      options->EmitNoNoise = TRUE;

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);
221 222 223
      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);
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,
234 235
                                        PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);

236 237
      if (pc->MaxNativeInstructions &&
          (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
238 239 240
         can_ubo = FALSE;
      }

Brian Paul's avatar
Brian Paul committed
241
      if (options->EmitNoLoops)
242
         options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
243 244
      else
         options->MaxUnrollIterations = 255; /* SM3 limit */
245
      options->LowerClipDistance = true;
246
   }
247

248 249 250 251 252 253
   c->MaxCombinedTextureImageUnits =
         _min(c->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits +
              c->Program[MESA_SHADER_GEOMETRY].MaxTextureImageUnits +
              c->Program[MESA_SHADER_FRAGMENT].MaxTextureImageUnits,
              MAX_COMBINED_TEXTURE_IMAGE_UNITS);

254 255
   /* This depends on program constants. */
   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

262 263 264 265
   /* 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);
266
   c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
267 268 269 270
   c->Program[MESA_SHADER_FRAGMENT].MaxInputComponents = c->MaxVarying * 4;
   c->Program[MESA_SHADER_VERTEX].MaxOutputComponents = c->MaxVarying * 4;
   c->Program[MESA_SHADER_GEOMETRY].MaxInputComponents = c->MaxVarying * 4;
   c->Program[MESA_SHADER_GEOMETRY].MaxOutputComponents = c->MaxVarying * 4;
271 272
   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);
273

274 275 276
   c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
   c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);

277
   c->MaxProgramTextureGatherComponents = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS);
278 279 280
   c->MinProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET);
   c->MaxProgramTextureGatherOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET);

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);
286 287 288 289 290
   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);

291
   c->StripTextureBorder = GL_TRUE;
292 293 294 295

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

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 =
301 302 303
         c->Program[MESA_SHADER_VERTEX].MaxUniformBlocks +
         c->Program[MESA_SHADER_GEOMETRY].MaxUniformBlocks +
         c->Program[MESA_SHADER_FRAGMENT].MaxUniformBlocks;
304
      assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
305
   }
306 307 308
}


309 310 311 312 313 314 315 316 317 318 319 320
/**
 * 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;
};

321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344
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.
 */
static void init_format_extensions(struct st_context *st,
                           const struct st_extension_format_mapping *mapping,
                           unsigned num_mappings,
                           enum pipe_texture_target target,
                           unsigned bind_flags)
{
   struct pipe_screen *screen = st->pipe->screen;
   GLboolean *extensions = (GLboolean *) &st->ctx->Extensions;
345 346
   unsigned i;
   int j;
347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370
   int num_formats = Elements(mapping->format);
   int num_ext = Elements(mapping->extension_offset);

   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++)
         extensions[mapping[i].extension_offset[j]] = GL_TRUE;
   }
}
371

372
/**
373 374 375 376 377
 * 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.
378 379 380
 */
void st_init_extensions(struct st_context *st)
{
381
   struct pipe_screen *screen = st->pipe->screen;
382
   struct gl_context *ctx = st->ctx;
383
   int i, glsl_feature_level;
384 385 386
   GLboolean *extensions = (GLboolean *) &ctx->Extensions;

   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 },
389 390 391 392 393 394 395 396 397 398 399 400 401
      { 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                  },
      { 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               },
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       },
407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423

      { 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        },

      { 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. */
424

425
      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
426
      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   },
427 428
      { o(ARB_texture_multisample),          PIPE_CAP_TEXTURE_MULTISAMPLE              },
      { o(ARB_texture_query_lod),            PIPE_CAP_TEXTURE_QUERY_LOD                }
429
   };
430

431 432 433 434 435 436 437
   /* 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 } },

      { { o(ARB_texture_rgb10_a2ui) },
438 439 440
        { PIPE_FORMAT_R10G10B10A2_UINT,
          PIPE_FORMAT_B10G10R10A2_UINT },
         GL_TRUE }, /* at least one format must be supported */
441 442 443 444 445 446 447 448 449 450 451 452

      { { 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 } },
453 454 455 456

      { { o(ARB_texture_rg) },
        { PIPE_FORMAT_R8_UNORM,
          PIPE_FORMAT_R8G8_UNORM } },
457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
   };

   /* 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),
481
          o(ANGLE_texture_compression_dxt) },
482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521
        { PIPE_FORMAT_DXT1_RGB,
          PIPE_FORMAT_DXT1_RGBA,
          PIPE_FORMAT_DXT3_RGBA,
          PIPE_FORMAT_DXT5_RGBA } },

      { { 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) },
        { PIPE_FORMAT_ETC1_RGB8 } },
   };

   /* 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 } },
522 523
      { { o(ARB_vertex_type_10f_11f_11f_rev) },
        { PIPE_FORMAT_R11G11B10_FLOAT } },
524 525
   };

526 527 528 529 530 531 532 533
   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,
        } },
   };

534 535 536
   /*
    * Extensions that are supported by all Gallium drivers:
    */
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;
Brian Paul's avatar
Brian Paul committed
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 */
547 548 549 550
   ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
   ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
   ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
   ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
Brian Paul's avatar
Brian Paul committed
551
   ctx->Extensions.ARB_vertex_program = GL_TRUE;
552
   ctx->Extensions.ARB_vertex_shader = GL_TRUE;
553 554 555 556

   ctx->Extensions.EXT_blend_color = GL_TRUE;
   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
557
   ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
558 559
   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
   ctx->Extensions.EXT_point_parameters = GL_TRUE;
560
   ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
561 562 563 564 565 566 567 568

   /* IMPORTANT:
    *    Don't enable EXT_separate_shader_objects. It disallows a certain
    *    optimization in the GLSL compiler and therefore is considered
    *    harmful.
    */
   ctx->Extensions.EXT_separate_shader_objects = GL_FALSE;

569
   ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
570
   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
571

572 573
   ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;

574 575
   ctx->Extensions.MESA_pack_invert = GL_TRUE;

576
   ctx->Extensions.NV_fog_distance = GL_TRUE;
577
   ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
578
   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
579
   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;
583 584
   ctx->Extensions.OES_draw_texture = GL_TRUE;

585 586 587 588 589 590 591
   /* Expose the extensions which directly correspond to gallium caps. */
   for (i = 0; i < Elements(cap_mapping); i++) {
      if (screen->get_param(screen, cap_mapping[i].cap)) {
         extensions[cap_mapping[i].extension_offset] = GL_TRUE;
      }
   }

592 593 594 595 596 597 598 599 600 601 602 603
   /* Expose the extensions which directly correspond to gallium formats. */
   init_format_extensions(st, rendertarget_mapping,
                          Elements(rendertarget_mapping), PIPE_TEXTURE_2D,
                          PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW);
   init_format_extensions(st, depthstencil_mapping,
                          Elements(depthstencil_mapping), PIPE_TEXTURE_2D,
                          PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW);
   init_format_extensions(st, texture_mapping, Elements(texture_mapping),
                          PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW);
   init_format_extensions(st, vertex_mapping, Elements(vertex_mapping),
                          PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER);

604 605 606
   /* Figure out GLSL support. */
   glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);

607 608 609
   ctx->Const.GLSLVersion = glsl_feature_level;
   if (glsl_feature_level >= 330)
      ctx->Const.GLSLVersion = 330;
610 611 612

   _mesa_override_glsl_version(st->ctx);

613 614 615 616 617
   if (st->options.force_glsl_version > 0 &&
       st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
      ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
   }

618 619 620 621 622 623 624
   /* This extension needs full OpenGL 3.2, but we don't know if that's
    * supported at this point. Only check the GLSL version. */
   if (ctx->Const.GLSLVersion >= 150 &&
       screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER)) {
      ctx->Extensions.AMD_vertex_shader_layer = GL_TRUE;
   }

625 626 627 628
   if (ctx->Const.GLSLVersion >= 130) {
      ctx->Const.NativeIntegers = GL_TRUE;
      ctx->Const.MaxClipPlanes = 8;

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;
634 635 636 637

      if (!st->options.disable_shader_bit_encoding) {
         ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
      }
638 639 640 641 642 643 644 645 646 647
   } 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)) {
         ctx->Const.NativeIntegers = GL_TRUE;
      }
   }

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
   }

655 656
   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
                                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
   }
Marek Olšák's avatar
Marek Olšák committed
661

662 663
   ctx->Extensions.NV_primitive_restart = GL_TRUE;
   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;
670 671 672 673 674 675 676 677

      if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) {
         st->clamp_vert_color_in_shader = TRUE;
      }

      if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) {
         st->clamp_frag_color_in_shader = TRUE;
      }
678 679 680 681 682 683 684 685 686 687

      /* For drivers which cannot do color clamping, it's better to just
       * disable ARB_color_buffer_float in the core profile, because
       * the clamping is deprecated there anyway. */
      if (ctx->API == API_OPENGL_CORE &&
          (st->clamp_frag_color_in_shader || st->clamp_vert_color_in_shader)) {
         st->clamp_vert_color_in_shader = GL_FALSE;
         st->clamp_frag_color_in_shader = GL_FALSE;
         ctx->Extensions.ARB_color_buffer_float = GL_FALSE;
      }
688
   }
689

Marek Olšák's avatar
Marek Olšák committed
690 691 692
   if (screen->fence_finish) {
      ctx->Extensions.ARB_sync = GL_TRUE;
   }
693

694 695
   /* Maximum sample count. */
   for (i = 16; i > 0; --i) {
696 697 698 699 700
      enum pipe_format pformat = st_choose_format(st, GL_RGBA,
                                                  GL_NONE, GL_NONE,
                                                  PIPE_TEXTURE_2D, i,
                                                  PIPE_BIND_RENDER_TARGET, FALSE);
      if (pformat != PIPE_FORMAT_NONE) {
701
         ctx->Const.MaxSamples = i;
702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722
         ctx->Const.MaxColorTextureSamples = i;
         break;
      }
   }
   for (i = ctx->Const.MaxSamples; i > 0; --i) {
      enum pipe_format pformat = st_choose_format(st, GL_DEPTH_STENCIL,
                                                  GL_NONE, GL_NONE,
                                                  PIPE_TEXTURE_2D, i,
                                                  PIPE_BIND_DEPTH_STENCIL, FALSE);
      if (pformat != PIPE_FORMAT_NONE) {
         ctx->Const.MaxDepthTextureSamples = i;
         break;
      }
   }
   for (i = ctx->Const.MaxSamples; i > 0; --i) {
      enum pipe_format pformat = st_choose_format(st, GL_RGBA_INTEGER,
                                                  GL_NONE, GL_NONE,
                                                  PIPE_TEXTURE_2D, i,
                                                  PIPE_BIND_RENDER_TARGET, FALSE);
      if (pformat != PIPE_FORMAT_NONE) {
         ctx->Const.MaxIntegerSamples = i;
723 724 725
         break;
      }
   }
726 727 728 729
   if (ctx->Const.MaxSamples == 1) {
      /* one sample doesn't really make sense */
      ctx->Const.MaxSamples = 0;
   }
730 731
   else if (ctx->Const.MaxSamples >= 2) {
      ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
732
      ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
733
   }
734

735 736 737 738 739 740 741
   if (ctx->Const.MaxSamples == 0 && screen->get_param(screen, PIPE_CAP_FAKE_SW_MSAA)) {
	ctx->Const.FakeSWMSAA = GL_TRUE;
        ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
        ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
        ctx->Extensions.ARB_texture_multisample = GL_TRUE;
   }

742 743
   if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
       !st->options.disable_blend_func_extended)
744
      ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
745

746 747 748 749 750 751
   st->has_time_elapsed =
      screen->get_param(screen, PIPE_CAP_QUERY_TIME_ELAPSED);

   if (st->has_time_elapsed ||
       ctx->Extensions.ARB_timer_query) {
      ctx->Extensions.EXT_timer_query = GL_TRUE;
752
   }
753 754 755 756 757

   if (ctx->Extensions.ARB_transform_feedback2 &&
       ctx->Extensions.ARB_draw_instanced) {
      ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
   }
758
   if (st->options.force_glsl_extensions_warn)
Brian Paul's avatar
Brian Paul committed
759
      ctx->Const.ForceGLSLExtensionsWarn = 1;
760

761
   if (st->options.disable_glsl_line_continuations)
Brian Paul's avatar
Brian Paul committed
762
      ctx->Const.DisableGLSLLineContinuations = 1;
763

764 765
   ctx->Const.MinMapBufferAlignment =
      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

770 771 772
      ctx->Const.MaxTextureBufferSize =
         _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
              (1u << 31) - 1);
773 774 775 776 777 778
      ctx->Const.TextureBufferOffsetAlignment =
         screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);

      if (ctx->Const.TextureBufferOffsetAlignment)
         ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;

779 780 781 782
      init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
                             PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
   }

783
   if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES)) {
784 785
      ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
   }
786 787 788 789 790 791 792 793 794 795 796 797 798 799

   /* 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.
       */
      if (!ctx->Extensions.EXT_transform_feedback)
         ctx->Const.DisableVaryingPacking = GL_TRUE;
   }
800 801 802 803

   if (ctx->API == API_OPENGL_CORE) {
      ctx->Const.MaxViewports = screen->get_param(screen, PIPE_CAP_MAX_VIEWPORTS);
      if (ctx->Const.MaxViewports >= 16) {
804 805
         ctx->Const.ViewportBounds.Min = -16384.0;
         ctx->Const.ViewportBounds.Max = 16384.0;
806 807 808
         ctx->Extensions.ARB_viewport_array = GL_TRUE;
      }
   }
809 810
   if (ctx->Const.MaxProgramTextureGatherComponents > 0)
      ctx->Extensions.ARB_texture_gather = GL_TRUE;
811
}