st_extensions.c 31.5 KB
Newer Older
1 2 3
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4
 * Copyright (c) 2008 VMware, Inc.
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
 * 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.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * 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
static unsigned _min(unsigned a, unsigned b)
43 44 45 46
{
   return (a < b) ? a : b;
}

47
static float _maxf(float a, float b)
48 49 50 51
{
   return (a > b) ? a : b;
}

52
static int _clamp(int a, int min, int max)
53
{
54 55 56 57 58 59
   if (a < min)
      return min;
   else if (a > max)
      return max;
   else
      return a;
60 61 62
}


63 64 65 66
/**
 * Query driver to get implementation limits.
 * Note that we have to limit/clamp against Mesa's internal limits too.
 */
67 68
void st_init_limits(struct st_context *st)
{
69
   struct pipe_screen *screen = st->pipe->screen;
70
   struct gl_constants *c = &st->ctx->Const;
71
   unsigned sh;
72
   boolean can_ubo = TRUE;
73 74

   c->MaxTextureLevels
75
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
76
            MAX_TEXTURE_LEVELS);
77

78
   c->Max3DTextureLevels
79
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
80
            MAX_3D_TEXTURE_LEVELS);
81

82
   c->MaxCubeTextureLevels
83
      = _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
84
            MAX_CUBE_TEXTURE_LEVELS);
85

86
   c->MaxTextureRectSize
87
      = _min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
88

89 90 91
   c->MaxArrayTextureLayers
      = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS);

92 93 94 95
   c->MaxCombinedTextureImageUnits
      = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS),
             MAX_COMBINED_TEXTURE_IMAGE_UNITS);

96 97 98 99 100 101 102 103
   /* 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;

104 105 106
   c->MaxDrawBuffers = c->MaxColorAttachments =
      _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
             1, MAX_DRAW_BUFFERS);
107

108 109 110 111
   c->MaxDualSourceDrawBuffers
      = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS),
              0, MAX_DRAW_BUFFERS);

112
   c->MaxLineWidth
113 114
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_LINE_WIDTH));
115
   c->MaxLineWidthAA
116 117
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_LINE_WIDTH_AA));
118 119

   c->MaxPointSize
120 121
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_POINT_WIDTH));
122
   c->MaxPointSizeAA
123 124
      = _maxf(1.0f, screen->get_paramf(screen,
                                       PIPE_CAPF_MAX_POINT_WIDTH_AA));
125 126 127 128
   /* 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);
129 130 131 132 133
   /* 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;
134 135

   c->MaxTextureMaxAnisotropy
136 137
      = _maxf(2.0f, screen->get_paramf(screen,
                                 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY));
138 139

   c->MaxTextureLodBias
140
      = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS);
141

142 143
   c->QuadsFollowProvokingVertexConvention = screen->get_param(
      screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
144

145 146 147 148 149 150 151
   c->MaxUniformBlockSize =
      screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT,
                               PIPE_SHADER_CAP_MAX_CONSTS) * 16;
   if (c->MaxUniformBlockSize < 16384) {
      can_ubo = FALSE;
   }

152 153
   for (sh = 0; sh < PIPE_SHADER_TYPES; ++sh) {
      struct gl_shader_compiler_options *options;
154
      struct gl_program_constants *pc;
155 156

      switch (sh) {
157 158
      case PIPE_SHADER_FRAGMENT:
         pc = &c->FragmentProgram;
159
         options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_FRAGMENT];
160 161 162
         break;
      case PIPE_SHADER_VERTEX:
         pc = &c->VertexProgram;
163
         options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_VERTEX];
164 165 166
         break;
      case PIPE_SHADER_GEOMETRY:
         pc = &c->GeometryProgram;
167
         options = &st->ctx->ShaderCompilerOptions[MESA_SHADER_GEOMETRY];
168
         break;
169
      default:
170
         /* compute shader, etc. */
171
         continue;
172 173
      }

174 175 176 177 178
      pc->MaxTextureImageUnits =
         _min(screen->get_shader_param(screen, sh,
                                       PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS),
              MAX_TEXTURE_IMAGE_UNITS);

179 180 181 182 183 184 185 186 187 188 189 190 191
      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     =
192 193
         _min(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS),
              MAX_PROGRAM_ADDRESS_REGS);
194 195 196 197 198 199 200 201 202
      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. */
203
      pc->MaxUniformBlocks = _min(pc->MaxUniformBlocks, MAX_UNIFORM_BUFFERS);
204 205 206 207

      pc->MaxCombinedUniformComponents = (pc->MaxUniformComponents +
                                          c->MaxUniformBlockSize / 4 *
                                          pc->MaxUniformBlocks);
208

209 210 211
      /* Gallium doesn't really care about local vs. env parameters so use the
       * same limits.
       */
212 213
      pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS);
      pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS);
214

215 216
      options->EmitNoNoise = TRUE;

217
      /* TODO: make these more fine-grained if anyone needs it */
218
      options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH);
219 220 221
      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);
222

223
      options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED);
224

225
      options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh,
226
                                        PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR);
227
      options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh,
228
                                        PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR);
229
      options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh,
230
                                        PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR);
231
      options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh,
232 233
                                        PIPE_SHADER_CAP_INDIRECT_CONST_ADDR);

234 235
      if (pc->MaxNativeInstructions &&
          (options->EmitNoIndirectUniform || pc->MaxUniformBlocks < 12)) {
236 237 238
         can_ubo = FALSE;
      }

Brian Paul's avatar
Brian Paul committed
239
      if (options->EmitNoLoops)
240
         options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536);
241 242
      else
         options->MaxUnrollIterations = 255; /* SM3 limit */
243
      options->LowerClipDistance = true;
244
   }
245

246 247 248 249 250 251
   /* This depends on program constants. */
   c->MaxTextureCoordUnits
      = _min(c->FragmentProgram.MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS);

   c->MaxTextureUnits = _min(c->FragmentProgram.MaxTextureImageUnits, c->MaxTextureCoordUnits);

252 253
   c->VertexProgram.MaxAttribs = MIN2(c->VertexProgram.MaxAttribs, 16);

254 255 256 257
   /* 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);
258
   c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING);
259 260 261 262
   c->FragmentProgram.MaxInputComponents = c->MaxVarying * 4;
   c->VertexProgram.MaxOutputComponents = c->MaxVarying * 4;
   c->GeometryProgram.MaxInputComponents = c->MaxVarying * 4;
   c->GeometryProgram.MaxOutputComponents = c->MaxVarying * 4;
263

264 265 266 267
   c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET);
   c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET);

   c->UniformBooleanTrue = ~0;
268

269
   c->MaxTransformFeedbackBuffers =
270
      screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS);
271
   c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS);
272 273 274 275 276
   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);

277
   c->StripTextureBorder = GL_TRUE;
278 279 280 281

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

282
   if (can_ubo) {
283
      st->ctx->Extensions.ARB_uniform_buffer_object = GL_TRUE;
284
      c->UniformBufferOffsetAlignment =
285
         screen->get_param(screen, PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT);
286 287 288 289
      c->MaxCombinedUniformBlocks = c->MaxUniformBufferBindings =
         c->VertexProgram.MaxUniformBlocks +
         c->GeometryProgram.MaxUniformBlocks +
         c->FragmentProgram.MaxUniformBlocks;
290
      assert(c->MaxCombinedUniformBlocks <= MAX_COMBINED_UNIFORM_BUFFERS);
291
   }
292 293 294
}


295 296 297 298 299 300 301 302 303 304 305 306
/**
 * 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;
};

307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
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;
331 332
   unsigned i;
   int j;
333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356
   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;
   }
}
357

358
/**
359 360 361 362 363
 * 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.
364 365 366
 */
void st_init_extensions(struct st_context *st)
{
367
   struct pipe_screen *screen = st->pipe->screen;
368
   struct gl_context *ctx = st->ctx;
369
   int i, glsl_feature_level;
370 371 372
   GLboolean *extensions = (GLboolean *) &ctx->Extensions;

   static const struct st_extension_cap_mapping cap_mapping[] = {
373
      { o(ARB_base_instance),                PIPE_CAP_START_INSTANCE                   },
374 375 376 377 378 379 380 381 382 383 384 385 386
      { 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               },
387
      { o(ARB_texture_mirror_clamp_to_edge), PIPE_CAP_TEXTURE_MIRROR_CLAMP             },
388
      { o(ARB_texture_non_power_of_two),     PIPE_CAP_NPOT_TEXTURES                    },
389
      { o(ARB_timer_query),                  PIPE_CAP_QUERY_TIMESTAMP                  },
390
      { o(ARB_transform_feedback2),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
391
      { o(ARB_transform_feedback3),          PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME       },
392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408

      { 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. */
409

410
      { o(OES_standard_derivatives),         PIPE_CAP_SM3                              },
411 412
      { o(ARB_texture_cube_map_array),       PIPE_CAP_CUBE_MAP_ARRAY                   },
      { o(ARB_texture_multisample),          PIPE_CAP_TEXTURE_MULTISAMPLE              }
413
   };
414

415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434
   /* 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) },
        { PIPE_FORMAT_B10G10R10A2_UINT } },

      { { 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 } },
435 436 437 438

      { { o(ARB_texture_rg) },
        { PIPE_FORMAT_R8_UNORM,
          PIPE_FORMAT_R8G8_UNORM } },
439 440 441 442 443 444 445 446
   };

   /* 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 } },

447
      { { o(EXT_packed_depth_stencil) },
448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467
        { PIPE_FORMAT_S8_UINT_Z24_UNORM,
          PIPE_FORMAT_Z24_UNORM_S8_UINT },
        GL_TRUE }, /* at least one format must be supported */
   };

   /* 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),
468
          o(ANGLE_texture_compression_dxt) },
469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508
        { 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 } },
509 510
      { { o(ARB_vertex_type_10f_11f_11f_rev) },
        { PIPE_FORMAT_R11G11B10_FLOAT } },
511 512
   };

513 514 515 516 517 518 519 520
   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,
        } },
   };

521 522 523
   /*
    * Extensions that are supported by all Gallium drivers:
    */
524
   ctx->Extensions.ARB_ES2_compatibility = GL_TRUE;
525
   ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE;
526
   ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE;
527
   ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE;
Brian Paul's avatar
Brian Paul committed
528
   ctx->Extensions.ARB_fragment_program = GL_TRUE;
529
   ctx->Extensions.ARB_fragment_shader = GL_TRUE;
530
   ctx->Extensions.ARB_half_float_pixel = GL_TRUE;
531
   ctx->Extensions.ARB_half_float_vertex = GL_TRUE;
532
   ctx->Extensions.ARB_internalformat_query = GL_TRUE;
533
   ctx->Extensions.ARB_map_buffer_range = GL_TRUE;
534
   ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
535 536 537 538
   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
539
   ctx->Extensions.ARB_vertex_program = GL_TRUE;
540
   ctx->Extensions.ARB_vertex_shader = GL_TRUE;
541 542 543 544

   ctx->Extensions.EXT_blend_color = GL_TRUE;
   ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
   ctx->Extensions.EXT_blend_minmax = GL_TRUE;
545
   ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
546
   ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
547 548
   ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
   ctx->Extensions.EXT_point_parameters = GL_TRUE;
549
   ctx->Extensions.EXT_provoking_vertex = GL_TRUE;
550 551 552 553 554 555 556 557

   /* 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;

558
   ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
559
   ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
560

561 562
   ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;

563 564
   ctx->Extensions.MESA_pack_invert = GL_TRUE;

565
   ctx->Extensions.NV_fog_distance = GL_TRUE;
566
   ctx->Extensions.NV_texture_env_combine4 = GL_TRUE;
567
   ctx->Extensions.NV_texture_rectangle = GL_TRUE;
568
   ctx->Extensions.NV_vdpau_interop = GL_TRUE;
569

570
   ctx->Extensions.OES_EGL_image = GL_TRUE;
571
   ctx->Extensions.OES_EGL_image_external = GL_TRUE;
572 573
   ctx->Extensions.OES_draw_texture = GL_TRUE;

574 575 576 577 578 579 580
   /* 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;
      }
   }

581 582 583 584 585 586 587 588 589 590 591 592
   /* 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);

593 594 595
   /* Figure out GLSL support. */
   glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);

596 597 598
   ctx->Const.GLSLVersion = glsl_feature_level;
   if (glsl_feature_level >= 330)
      ctx->Const.GLSLVersion = 330;
599 600 601

   _mesa_override_glsl_version(st->ctx);

602 603 604 605 606
   if (st->options.force_glsl_version > 0 &&
       st->options.force_glsl_version <= ctx->Const.GLSLVersion) {
      ctx->Const.ForceGLSLVersion = st->options.force_glsl_version;
   }

607 608 609 610 611 612 613
   /* 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;
   }

614 615 616 617
   if (ctx->Const.GLSLVersion >= 130) {
      ctx->Const.NativeIntegers = GL_TRUE;
      ctx->Const.MaxClipPlanes = 8;

618
      /* Extensions that either depend on GLSL 1.30 or are a subset thereof. */
619
      ctx->Extensions.ARB_conservative_depth = GL_TRUE;
620
      ctx->Extensions.ARB_shading_language_packing = GL_TRUE;
621
      ctx->Extensions.OES_depth_texture_cube_map = GL_TRUE;
622
      ctx->Extensions.ARB_shading_language_420pack = GL_TRUE;
623 624 625 626

      if (!st->options.disable_shader_bit_encoding) {
         ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE;
      }
627 628 629 630 631 632 633 634 635 636
   } 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;
      }
   }

637
   /* Below are the cases which cannot be moved into tables easily. */
638

639
   if (!ctx->Mesa_DXTn && !st->options.force_s3tc_enable) {
640
      ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE;
641
      ctx->Extensions.ANGLE_texture_compression_dxt = GL_FALSE;
642 643
   }

644 645
   if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY,
                                PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
646
#if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */
647
      ctx->Extensions.ARB_geometry_shader4 = GL_TRUE;
648
#endif
649
   }
Marek Olšák's avatar
Marek Olšák committed
650

651 652
   ctx->Extensions.NV_primitive_restart = GL_TRUE;
   if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) {
653
      ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
654 655
   }

656
   /* ARB_color_buffer_float. */
657
   if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) {
658
      ctx->Extensions.ARB_color_buffer_float = GL_TRUE;
659 660 661 662 663 664 665 666

      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;
      }
667 668 669 670 671 672 673 674 675 676

      /* 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;
      }
677
   }
678

Marek Olšák's avatar
Marek Olšák committed
679 680 681
   if (screen->fence_finish) {
      ctx->Extensions.ARB_sync = GL_TRUE;
   }
682

683 684
   /* Maximum sample count. */
   for (i = 16; i > 0; --i) {
685 686 687 688 689
      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) {
690
         ctx->Const.MaxSamples = i;
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
         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;
712 713 714
         break;
      }
   }
715 716 717 718
   if (ctx->Const.MaxSamples == 1) {
      /* one sample doesn't really make sense */
      ctx->Const.MaxSamples = 0;
   }
719 720
   else if (ctx->Const.MaxSamples >= 2) {
      ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
721
      ctx->Extensions.EXT_framebuffer_multisample_blit_scaled = GL_TRUE;
722
   }
723

724 725
   if (ctx->Const.MaxDualSourceDrawBuffers > 0 &&
       !st->options.disable_blend_func_extended)
726
      ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
727

728 729 730 731 732 733
   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;
734
   }
735 736 737 738 739

   if (ctx->Extensions.ARB_transform_feedback2 &&
       ctx->Extensions.ARB_draw_instanced) {
      ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE;
   }
740
   if (st->options.force_glsl_extensions_warn)
Brian Paul's avatar
Brian Paul committed
741
      ctx->Const.ForceGLSLExtensionsWarn = 1;
742

743
   if (st->options.disable_glsl_line_continuations)
Brian Paul's avatar
Brian Paul committed
744
      ctx->Const.DisableGLSLLineContinuations = 1;
745

746 747 748 749 750
   ctx->Const.MinMapBufferAlignment =
      screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);
   if (ctx->Const.MinMapBufferAlignment >= 64) {
      ctx->Extensions.ARB_map_buffer_alignment = GL_TRUE;
   }
751
   if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
752
      ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
753

754 755 756
      ctx->Const.MaxTextureBufferSize =
         _min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE),
              (1u << 31) - 1);
757 758 759 760 761 762
      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;

763 764 765 766
      init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
                             PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
   }

767 768 769 770
   if (screen->get_param(screen, PIPE_CAP_MIXED_FRAMEBUFFER_SIZES) &&
       ctx->Extensions.EXT_packed_depth_stencil) {
      ctx->Extensions.ARB_framebuffer_object = GL_TRUE;
   }
771 772 773 774 775 776 777 778 779 780 781 782 783 784

   /* 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;
   }
785
}