1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4 * Copyright (c) 2008 VMware, Inc. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 **************************************************************************/ 28 29#include "main/imports.h" 30#include "main/context.h" 31#include "main/macros.h" 32#include "main/mfeatures.h" 33#include "main/version.h" 34 35#include "pipe/p_context.h" 36#include "pipe/p_defines.h" 37#include "pipe/p_screen.h" 38 39#include "st_context.h" 40#include "st_extensions.h" 41 42 43static int _min(int a, int b) 44{ 45 return (a < b) ? a : b; 46} 47 48static float _maxf(float a, float b) 49{ 50 return (a > b) ? a : b; 51} 52 53static int _clamp(int a, int min, int max) 54{ 55 if (a < min) 56 return min; 57 else if (a > max) 58 return max; 59 else 60 return a; 61} 62 63 64/** 65 * Query driver to get implementation limits. 66 * Note that we have to limit/clamp against Mesa's internal limits too. 67 */ 68void st_init_limits(struct st_context *st) 69{ 70 struct pipe_screen *screen = st->pipe->screen; 71 struct gl_constants *c = &st->ctx->Const; 72 gl_shader_type sh; 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 c->MaxArrayTextureLayers 90 = screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS); 91 92 c->MaxTextureImageUnits 93 = _min(screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, 94 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS), 95 MAX_TEXTURE_IMAGE_UNITS); 96 97 c->MaxVertexTextureImageUnits 98 = _min(screen->get_shader_param(screen, PIPE_SHADER_VERTEX, 99 PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS), 100 MAX_VERTEX_TEXTURE_IMAGE_UNITS); 101 102 c->MaxCombinedTextureImageUnits 103 = _min(screen->get_param(screen, PIPE_CAP_MAX_COMBINED_SAMPLERS), 104 MAX_COMBINED_TEXTURE_IMAGE_UNITS); 105 106 c->MaxTextureCoordUnits 107 = _min(c->MaxTextureImageUnits, MAX_TEXTURE_COORD_UNITS); 108 109 c->MaxTextureUnits = _min(c->MaxTextureImageUnits, c->MaxTextureCoordUnits); 110 111 /* Define max viewport size and max renderbuffer size in terms of 112 * max texture size (note: max tex RECT size = max tex 2D size). 113 * If this isn't true for some hardware we'll need new PIPE_CAP_ queries. 114 */ 115 c->MaxViewportWidth = 116 c->MaxViewportHeight = 117 c->MaxRenderbufferSize = c->MaxTextureRectSize; 118 119 c->MaxDrawBuffers 120 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS), 121 1, MAX_DRAW_BUFFERS); 122 123 c->MaxDualSourceDrawBuffers 124 = _clamp(screen->get_param(screen, PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS), 125 0, MAX_DRAW_BUFFERS); 126 127 c->MaxLineWidth 128 = _maxf(1.0f, screen->get_paramf(screen, 129 PIPE_CAPF_MAX_LINE_WIDTH)); 130 c->MaxLineWidthAA 131 = _maxf(1.0f, screen->get_paramf(screen, 132 PIPE_CAPF_MAX_LINE_WIDTH_AA)); 133 134 c->MaxPointSize 135 = _maxf(1.0f, screen->get_paramf(screen, 136 PIPE_CAPF_MAX_POINT_WIDTH)); 137 c->MaxPointSizeAA 138 = _maxf(1.0f, screen->get_paramf(screen, 139 PIPE_CAPF_MAX_POINT_WIDTH_AA)); 140 /* called after _mesa_create_context/_mesa_init_point, fix default user 141 * settable max point size up 142 */ 143 st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA); 144 /* these are not queryable. Note that GL basically mandates a 1.0 minimum 145 * for non-aa sizes, but we can go down to 0.0 for aa points. 146 */ 147 c->MinPointSize = 1.0f; 148 c->MinPointSizeAA = 0.0f; 149 150 c->MaxTextureMaxAnisotropy 151 = _maxf(2.0f, screen->get_paramf(screen, 152 PIPE_CAPF_MAX_TEXTURE_ANISOTROPY)); 153 154 c->MaxTextureLodBias 155 = screen->get_paramf(screen, PIPE_CAPF_MAX_TEXTURE_LOD_BIAS); 156 157 c->MaxDrawBuffers 158 = CLAMP(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS), 159 1, MAX_DRAW_BUFFERS); 160 161 c->QuadsFollowProvokingVertexConvention = screen->get_param( 162 screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION); 163 164 for (sh = 0; sh < MESA_SHADER_TYPES; ++sh) { 165 struct gl_shader_compiler_options *options = 166 &st->ctx->ShaderCompilerOptions[sh]; 167 struct gl_program_constants *pc; 168 169 switch (sh) { 170 case PIPE_SHADER_FRAGMENT: 171 pc = &c->FragmentProgram; 172 break; 173 case PIPE_SHADER_VERTEX: 174 pc = &c->VertexProgram; 175 break; 176 case PIPE_SHADER_GEOMETRY: 177 pc = &c->GeometryProgram; 178 break; 179 default: 180 assert(0); 181 continue; 182 } 183 184 pc->MaxNativeInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS); 185 pc->MaxNativeAluInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS); 186 pc->MaxNativeTexInstructions = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS); 187 pc->MaxNativeTexIndirections = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS); 188 pc->MaxNativeAttribs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INPUTS); 189 pc->MaxNativeTemps = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_TEMPS); 190 pc->MaxNativeAddressRegs = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_ADDRS); 191 pc->MaxNativeParameters = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONSTS); 192 pc->MaxUniformComponents = 4 * MIN2(pc->MaxNativeParameters, MAX_UNIFORMS); 193 /* raise MaxParameters if native support is higher */ 194 pc->MaxParameters = MAX2(pc->MaxParameters, pc->MaxNativeParameters); 195 196 /* Gallium doesn't really care about local vs. env parameters so use the 197 * same limits. 198 */ 199 pc->MaxLocalParams = MIN2(pc->MaxParameters, MAX_PROGRAM_LOCAL_PARAMS); 200 pc->MaxEnvParams = MIN2(pc->MaxParameters, MAX_PROGRAM_ENV_PARAMS); 201 202 options->EmitNoNoise = TRUE; 203 204 /* TODO: make these more fine-grained if anyone needs it */ 205 options->MaxIfDepth = screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH); 206 options->EmitNoLoops = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH); 207 options->EmitNoFunctions = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES); 208 options->EmitNoMainReturn = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_SUBROUTINES); 209 210 options->EmitNoCont = !screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED); 211 212 options->EmitNoIndirectInput = !screen->get_shader_param(screen, sh, 213 PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR); 214 options->EmitNoIndirectOutput = !screen->get_shader_param(screen, sh, 215 PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR); 216 options->EmitNoIndirectTemp = !screen->get_shader_param(screen, sh, 217 PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR); 218 options->EmitNoIndirectUniform = !screen->get_shader_param(screen, sh, 219 PIPE_SHADER_CAP_INDIRECT_CONST_ADDR); 220 221 if (options->EmitNoLoops) 222 options->MaxUnrollIterations = MIN2(screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_MAX_INSTRUCTIONS), 65536); 223 else 224 options->MaxUnrollIterations = 255; /* SM3 limit */ 225 options->LowerClipDistance = true; 226 } 227 228 /* PIPE_SHADER_CAP_MAX_INPUTS for the FS specifies the maximum number 229 * of inputs. It's always 2 colors + N generic inputs. */ 230 c->MaxVarying = screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, 231 PIPE_SHADER_CAP_MAX_INPUTS); 232 c->MaxVarying = MIN2(c->MaxVarying, MAX_VARYING); 233 234 c->MinProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MIN_TEXEL_OFFSET); 235 c->MaxProgramTexelOffset = screen->get_param(screen, PIPE_CAP_MAX_TEXEL_OFFSET); 236 237 c->UniformBooleanTrue = ~0; 238 239 c->MaxTransformFeedbackBuffers = 240 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS); 241 c->MaxTransformFeedbackBuffers = MIN2(c->MaxTransformFeedbackBuffers, MAX_FEEDBACK_BUFFERS); 242 c->MaxTransformFeedbackSeparateComponents = 243 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS); 244 c->MaxTransformFeedbackInterleavedComponents = 245 screen->get_param(screen, PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS); 246 247 c->StripTextureBorder = GL_TRUE; 248 249 c->GLSLSkipStrictMaxUniformLimitCheck = 250 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS); 251 252 c->GLSLSkipStrictMaxVaryingLimitCheck = 253 screen->get_param(screen, PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS); 254} 255 256 257static GLboolean st_get_s3tc_override(void) 258{ 259 const char *override = _mesa_getenv("force_s3tc_enable"); 260 if (override && !strcmp(override, "true")) 261 return GL_TRUE; 262 return GL_FALSE; 263} 264 265/** 266 * Given a member \c x of struct gl_extensions, return offset of 267 * \c x in bytes. 268 */ 269#define o(x) offsetof(struct gl_extensions, x) 270 271 272struct st_extension_cap_mapping { 273 int extension_offset; 274 int cap; 275}; 276 277struct st_extension_format_mapping { 278 int extension_offset[2]; 279 enum pipe_format format[8]; 280 281 /* If TRUE, at least one format must be supported for the extensions to be 282 * advertised. If FALSE, all the formats must be supported. */ 283 GLboolean need_at_least_one; 284}; 285 286/** 287 * Enable extensions if certain pipe formats are supported by the driver. 288 * What extensions will be enabled and what formats must be supported is 289 * described by the array of st_extension_format_mapping. 290 * 291 * target and bind_flags are passed to is_format_supported. 292 */ 293static void init_format_extensions(struct st_context *st, 294 const struct st_extension_format_mapping *mapping, 295 unsigned num_mappings, 296 enum pipe_texture_target target, 297 unsigned bind_flags) 298{ 299 struct pipe_screen *screen = st->pipe->screen; 300 GLboolean *extensions = (GLboolean *) &st->ctx->Extensions; 301 int i, j; 302 int num_formats = Elements(mapping->format); 303 int num_ext = Elements(mapping->extension_offset); 304 305 for (i = 0; i < num_mappings; i++) { 306 int num_supported = 0; 307 308 /* Examine each format in the list. */ 309 for (j = 0; j < num_formats && mapping[i].format[j]; j++) { 310 if (screen->is_format_supported(screen, mapping[i].format[j], 311 target, 0, bind_flags)) { 312 num_supported++; 313 } 314 } 315 316 if (!num_supported || 317 (!mapping[i].need_at_least_one && num_supported != j)) { 318 continue; 319 } 320 321 /* Enable all extensions in the list. */ 322 for (j = 0; j < num_ext && mapping[i].extension_offset[j]; j++) 323 extensions[mapping[i].extension_offset[j]] = GL_TRUE; 324 } 325} 326 327/** 328 * Use pipe_screen::get_param() to query PIPE_CAP_ values to determine 329 * which GL extensions are supported. 330 * Quite a few extensions are always supported because they are standard 331 * features or can be built on top of other gallium features. 332 * Some fine tuning may still be needed. 333 */ 334void st_init_extensions(struct st_context *st) 335{ 336 struct pipe_screen *screen = st->pipe->screen; 337 struct gl_context *ctx = st->ctx; 338 int i, glsl_feature_level; 339 GLboolean *extensions = (GLboolean *) &ctx->Extensions; 340 341 static const struct st_extension_cap_mapping cap_mapping[] = { 342 { o(ARB_base_instance), PIPE_CAP_START_INSTANCE }, 343 { o(ARB_depth_clamp), PIPE_CAP_DEPTH_CLIP_DISABLE }, 344 { o(ARB_depth_texture), PIPE_CAP_TEXTURE_SHADOW_MAP }, 345 { o(ARB_draw_buffers_blend), PIPE_CAP_INDEP_BLEND_FUNC }, 346 { o(ARB_draw_instanced), PIPE_CAP_TGSI_INSTANCEID }, 347 { o(ARB_fragment_program_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP }, 348 { o(ARB_instanced_arrays), PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR }, 349 { o(ARB_occlusion_query), PIPE_CAP_OCCLUSION_QUERY }, 350 { o(ARB_occlusion_query2), PIPE_CAP_OCCLUSION_QUERY }, 351 { o(ARB_point_sprite), PIPE_CAP_POINT_SPRITE }, 352 { o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP }, 353 { o(ARB_shader_stencil_export), PIPE_CAP_SHADER_STENCIL_EXPORT }, 354 { o(ARB_shader_texture_lod), PIPE_CAP_SM3 }, 355 { o(ARB_shadow), PIPE_CAP_TEXTURE_SHADOW_MAP }, 356 { o(ARB_texture_non_power_of_two), PIPE_CAP_NPOT_TEXTURES }, 357 { o(ARB_transform_feedback2), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME }, 358 { o(ARB_transform_feedback3), PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME }, 359 360 { o(EXT_blend_equation_separate), PIPE_CAP_BLEND_EQUATION_SEPARATE }, 361 { o(EXT_draw_buffers2), PIPE_CAP_INDEP_BLEND_ENABLE }, 362 { o(EXT_shadow_funcs), PIPE_CAP_TEXTURE_SHADOW_MAP }, 363 { o(EXT_stencil_two_side), PIPE_CAP_TWO_SIDED_STENCIL }, 364 { o(EXT_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS }, 365 { o(EXT_texture_filter_anisotropic), PIPE_CAP_ANISOTROPIC_FILTER }, 366 { o(EXT_texture_mirror_clamp), PIPE_CAP_TEXTURE_MIRROR_CLAMP }, 367 { o(EXT_texture_swizzle), PIPE_CAP_TEXTURE_SWIZZLE }, 368 { o(EXT_timer_query), PIPE_CAP_TIMER_QUERY }, 369 { o(EXT_transform_feedback), PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS }, 370 371 { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE }, 372 { o(ATI_separate_stencil), PIPE_CAP_TWO_SIDED_STENCIL }, 373 { o(ATI_texture_mirror_once), PIPE_CAP_TEXTURE_MIRROR_CLAMP }, 374 { o(NV_conditional_render), PIPE_CAP_CONDITIONAL_RENDER }, 375 { o(NV_texture_barrier), PIPE_CAP_TEXTURE_BARRIER }, 376 /* GL_NV_point_sprite is not supported by gallium because we don't 377 * support the GL_POINT_SPRITE_R_MODE_NV option. */ 378 { o(MESA_texture_array), PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS }, 379 }; 380 381 /* Required: render target and sampler support */ 382 static const struct st_extension_format_mapping rendertarget_mapping[] = { 383 { { o(ARB_texture_float) }, 384 { PIPE_FORMAT_R32G32B32A32_FLOAT, 385 PIPE_FORMAT_R16G16B16A16_FLOAT } }, 386 387 { { o(ARB_texture_rgb10_a2ui) }, 388 { PIPE_FORMAT_B10G10R10A2_UINT } }, 389 390 { { o(EXT_framebuffer_sRGB) }, 391 { PIPE_FORMAT_A8B8G8R8_SRGB, 392 PIPE_FORMAT_B8G8R8A8_SRGB }, 393 GL_TRUE }, /* at least one format must be supported */ 394 395 { { o(EXT_packed_float) }, 396 { PIPE_FORMAT_R11G11B10_FLOAT } }, 397 398 { { o(EXT_texture_integer) }, 399 { PIPE_FORMAT_R32G32B32A32_UINT, 400 PIPE_FORMAT_R32G32B32A32_SINT } }, 401 }; 402 403 /* Required: depth stencil and sampler support */ 404 static const struct st_extension_format_mapping depthstencil_mapping[] = { 405 { { o(ARB_depth_buffer_float) }, 406 { PIPE_FORMAT_Z32_FLOAT, 407 PIPE_FORMAT_Z32_FLOAT_S8X24_UINT } }, 408 409 { { o(ARB_framebuffer_object), 410 o(EXT_packed_depth_stencil) }, 411 { PIPE_FORMAT_S8_UINT_Z24_UNORM, 412 PIPE_FORMAT_Z24_UNORM_S8_UINT }, 413 GL_TRUE }, /* at least one format must be supported */ 414 }; 415 416 /* Required: sampler support */ 417 static const struct st_extension_format_mapping texture_mapping[] = { 418 { { o(ARB_texture_compression_rgtc) }, 419 { PIPE_FORMAT_RGTC1_UNORM, 420 PIPE_FORMAT_RGTC1_SNORM, 421 PIPE_FORMAT_RGTC2_UNORM, 422 PIPE_FORMAT_RGTC2_SNORM } }, 423 424 { { o(ARB_texture_rg) }, 425 { PIPE_FORMAT_R8G8_UNORM } }, 426 427 { { o(EXT_texture_compression_latc) }, 428 { PIPE_FORMAT_LATC1_UNORM, 429 PIPE_FORMAT_LATC1_SNORM, 430 PIPE_FORMAT_LATC2_UNORM, 431 PIPE_FORMAT_LATC2_SNORM } }, 432 433 { { o(EXT_texture_compression_s3tc), 434 o(S3_s3tc) }, 435 { PIPE_FORMAT_DXT1_RGB, 436 PIPE_FORMAT_DXT1_RGBA, 437 PIPE_FORMAT_DXT3_RGBA, 438 PIPE_FORMAT_DXT5_RGBA } }, 439 440 { { o(EXT_texture_shared_exponent) }, 441 { PIPE_FORMAT_R9G9B9E5_FLOAT } }, 442 443 { { o(EXT_texture_snorm) }, 444 { PIPE_FORMAT_R8G8B8A8_SNORM } }, 445 446 { { o(EXT_texture_sRGB), 447 o(EXT_texture_sRGB_decode) }, 448 { PIPE_FORMAT_A8B8G8R8_SRGB, 449 PIPE_FORMAT_B8G8R8A8_SRGB }, 450 GL_TRUE }, /* at least one format must be supported */ 451 452 { { o(ATI_texture_compression_3dc) }, 453 { PIPE_FORMAT_LATC2_UNORM } }, 454 455 { { o(MESA_ycbcr_texture) }, 456 { PIPE_FORMAT_UYVY, 457 PIPE_FORMAT_YUYV }, 458 GL_TRUE }, /* at least one format must be supported */ 459 460 { { o(OES_compressed_ETC1_RGB8_texture) }, 461 { PIPE_FORMAT_ETC1_RGB8 } }, 462 }; 463 464 /* Required: vertex fetch support. */ 465 static const struct st_extension_format_mapping vertex_mapping[] = { 466 { { o(ARB_vertex_type_2_10_10_10_rev) }, 467 { PIPE_FORMAT_R10G10B10A2_UNORM, 468 PIPE_FORMAT_B10G10R10A2_UNORM, 469 PIPE_FORMAT_R10G10B10A2_SNORM, 470 PIPE_FORMAT_B10G10R10A2_SNORM, 471 PIPE_FORMAT_R10G10B10A2_USCALED, 472 PIPE_FORMAT_B10G10R10A2_USCALED, 473 PIPE_FORMAT_R10G10B10A2_SSCALED, 474 PIPE_FORMAT_B10G10R10A2_SSCALED } }, 475 }; 476 477 /* 478 * Extensions that are supported by all Gallium drivers: 479 */ 480 ctx->Extensions.ARB_ES2_compatibility = GL_TRUE; 481 ctx->Extensions.ARB_copy_buffer = GL_TRUE; 482 ctx->Extensions.ARB_draw_elements_base_vertex = GL_TRUE; 483 ctx->Extensions.ARB_explicit_attrib_location = GL_TRUE; 484 ctx->Extensions.ARB_fragment_coord_conventions = GL_TRUE; 485 ctx->Extensions.ARB_fragment_program = GL_TRUE; 486 ctx->Extensions.ARB_fragment_shader = GL_TRUE; 487 ctx->Extensions.ARB_half_float_pixel = GL_TRUE; 488 ctx->Extensions.ARB_half_float_vertex = GL_TRUE; 489 ctx->Extensions.ARB_map_buffer_range = GL_TRUE; 490 ctx->Extensions.ARB_shader_objects = GL_TRUE; 491 ctx->Extensions.ARB_shading_language_100 = GL_TRUE; 492 ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */ 493 ctx->Extensions.ARB_texture_cube_map = GL_TRUE; 494 ctx->Extensions.ARB_texture_env_combine = GL_TRUE; 495 ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE; 496 ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE; 497 ctx->Extensions.ARB_texture_storage = GL_TRUE; 498 ctx->Extensions.ARB_vertex_program = GL_TRUE; 499 ctx->Extensions.ARB_vertex_shader = GL_TRUE; 500 ctx->Extensions.ARB_window_pos = GL_TRUE; 501 502 ctx->Extensions.EXT_blend_color = GL_TRUE; 503 ctx->Extensions.EXT_blend_func_separate = GL_TRUE; 504 ctx->Extensions.EXT_blend_minmax = GL_TRUE; 505 ctx->Extensions.EXT_framebuffer_blit = GL_TRUE; 506 ctx->Extensions.EXT_framebuffer_object = GL_TRUE; 507 ctx->Extensions.EXT_fog_coord = GL_TRUE; 508 ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE; 509 ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE; 510 ctx->Extensions.EXT_point_parameters = GL_TRUE; 511 ctx->Extensions.EXT_provoking_vertex = GL_TRUE; 512 ctx->Extensions.EXT_secondary_color = GL_TRUE; 513 ctx->Extensions.EXT_separate_shader_objects = GL_TRUE; 514 ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE; 515 ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE; 516 517 ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE; 518 519 ctx->Extensions.MESA_pack_invert = GL_TRUE; 520 521 ctx->Extensions.NV_blend_square = GL_TRUE; 522 ctx->Extensions.NV_fog_distance = GL_TRUE; 523 ctx->Extensions.NV_texgen_reflection = GL_TRUE; 524 ctx->Extensions.NV_texture_env_combine4 = GL_TRUE; 525 ctx->Extensions.NV_texture_rectangle = GL_TRUE; 526#if 0 527 /* possibly could support the following two */ 528 ctx->Extensions.NV_vertex_program = GL_TRUE; 529 ctx->Extensions.NV_vertex_program1_1 = GL_TRUE; 530#endif 531 532#if FEATURE_OES_EGL_image 533 ctx->Extensions.OES_EGL_image = GL_TRUE; 534 if (ctx->API != API_OPENGL) 535 ctx->Extensions.OES_EGL_image_external = GL_TRUE; 536#endif 537#if FEATURE_OES_draw_texture 538 ctx->Extensions.OES_draw_texture = GL_TRUE; 539#endif 540 541 /* Expose the extensions which directly correspond to gallium caps. */ 542 for (i = 0; i < Elements(cap_mapping); i++) { 543 if (screen->get_param(screen, cap_mapping[i].cap)) { 544 extensions[cap_mapping[i].extension_offset] = GL_TRUE; 545 } 546 } 547 548 /* Expose the extensions which directly correspond to gallium formats. */ 549 init_format_extensions(st, rendertarget_mapping, 550 Elements(rendertarget_mapping), PIPE_TEXTURE_2D, 551 PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW); 552 init_format_extensions(st, depthstencil_mapping, 553 Elements(depthstencil_mapping), PIPE_TEXTURE_2D, 554 PIPE_BIND_DEPTH_STENCIL | PIPE_BIND_SAMPLER_VIEW); 555 init_format_extensions(st, texture_mapping, Elements(texture_mapping), 556 PIPE_TEXTURE_2D, PIPE_BIND_SAMPLER_VIEW); 557 init_format_extensions(st, vertex_mapping, Elements(vertex_mapping), 558 PIPE_BUFFER, PIPE_BIND_VERTEX_BUFFER); 559 560 /* Figure out GLSL support. */ 561 glsl_feature_level = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL); 562 563 if (glsl_feature_level >= 130) { 564 ctx->Const.GLSLVersion = 130; 565 } else { 566 ctx->Const.GLSLVersion = 120; 567 } 568 569 _mesa_override_glsl_version(st->ctx); 570 571 if (ctx->Const.GLSLVersion >= 130) { 572 ctx->Const.NativeIntegers = GL_TRUE; 573 ctx->Const.MaxClipPlanes = 8; 574 575 /* Extensions that only depend on GLSL 1.3. */ 576 ctx->Extensions.ARB_conservative_depth = GL_TRUE; 577 ctx->Extensions.ARB_shader_bit_encoding = GL_TRUE; 578 } else { 579 /* Optional integer support for GLSL 1.2. */ 580 if (screen->get_shader_param(screen, PIPE_SHADER_VERTEX, 581 PIPE_SHADER_CAP_INTEGERS) && 582 screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, 583 PIPE_SHADER_CAP_INTEGERS)) { 584 ctx->Const.NativeIntegers = GL_TRUE; 585 } 586 } 587 588 /* Below are the cases which cannot be moved into tables easily. */ 589 590 if (!ctx->Mesa_DXTn && !st_get_s3tc_override()) { 591 ctx->Extensions.EXT_texture_compression_s3tc = GL_FALSE; 592 ctx->Extensions.S3_s3tc = GL_FALSE; 593 } 594 595 if (screen->get_shader_param(screen, PIPE_SHADER_GEOMETRY, 596 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) { 597#if 0 /* XXX re-enable when GLSL compiler again supports geometry shaders */ 598 ctx->Extensions.ARB_geometry_shader4 = GL_TRUE; 599#endif 600 } 601 602 ctx->Extensions.NV_primitive_restart = GL_TRUE; 603 if (!screen->get_param(screen, PIPE_CAP_PRIMITIVE_RESTART)) { 604 ctx->Const.PrimitiveRestartInSoftware = GL_TRUE; 605 } 606 607 if (screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_UNCLAMPED)) { 608 ctx->Extensions.ARB_color_buffer_float = GL_TRUE; 609 610 if (!screen->get_param(screen, PIPE_CAP_VERTEX_COLOR_CLAMPED)) { 611 st->clamp_vert_color_in_shader = TRUE; 612 } 613 614 if (!screen->get_param(screen, PIPE_CAP_FRAGMENT_COLOR_CLAMPED)) { 615 st->clamp_frag_color_in_shader = TRUE; 616 } 617 } 618 619 if (screen->fence_finish) { 620 ctx->Extensions.ARB_sync = GL_TRUE; 621 } 622 623 /* Maximum sample count. */ 624 for (i = 16; i > 0; --i) { 625 if (screen->is_format_supported(screen, PIPE_FORMAT_B8G8R8A8_UNORM, 626 PIPE_TEXTURE_2D, i, 627 PIPE_BIND_RENDER_TARGET)) { 628 ctx->Const.MaxSamples = i; 629 break; 630 } 631 } 632 if (ctx->Const.MaxSamples == 1) { 633 /* one sample doesn't really make sense */ 634 ctx->Const.MaxSamples = 0; 635 } 636 else if (ctx->Const.MaxSamples >= 2) { 637 ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE; 638 } 639 640 if (ctx->Const.MaxDualSourceDrawBuffers > 0) 641 ctx->Extensions.ARB_blend_func_extended = GL_TRUE; 642 643 if (screen->get_param(screen, PIPE_CAP_TIMER_QUERY) && 644 screen->get_param(screen, PIPE_CAP_QUERY_TIMESTAMP)) { 645 ctx->Extensions.ARB_timer_query = GL_TRUE; 646 } 647 648 if (ctx->Extensions.ARB_transform_feedback2 && 649 ctx->Extensions.ARB_draw_instanced) { 650 ctx->Extensions.ARB_transform_feedback_instanced = GL_TRUE; 651 } 652 if (st->options.force_glsl_extensions_warn) 653 ctx->Const.ForceGLSLExtensionsWarn = 1; 654} 655