1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "gpu/command_buffer/service/feature_info.h" 6 7 #include <set> 8 9 #include "base/command_line.h" 10 #include "base/macros.h" 11 #include "base/metrics/histogram.h" 12 #include "base/strings/string_number_conversions.h" 13 #include "base/strings/string_split.h" 14 #include "base/strings/string_util.h" 15 #include "gpu/command_buffer/service/gl_utils.h" 16 #include "gpu/command_buffer/service/gpu_switches.h" 17 #include "ui/gl/gl_fence.h" 18 #include "ui/gl/gl_implementation.h" 19 20 namespace gpu { 21 namespace gles2 { 22 23 namespace { 24 25 struct FormatInfo { 26 GLenum format; 27 const GLenum* types; 28 size_t count; 29 }; 30 31 class StringSet { 32 public: 33 StringSet() {} 34 35 StringSet(const char* s) { 36 Init(s); 37 } 38 39 StringSet(const std::string& str) { 40 Init(str); 41 } 42 43 void Init(const char* s) { 44 std::string str(s ? s : ""); 45 Init(str); 46 } 47 48 void Init(const std::string& str) { 49 std::vector<std::string> tokens; 50 Tokenize(str, " ", &tokens); 51 string_set_.insert(tokens.begin(), tokens.end()); 52 } 53 54 bool Contains(const char* s) { 55 return string_set_.find(s) != string_set_.end(); 56 } 57 58 bool Contains(const std::string& s) { 59 return string_set_.find(s) != string_set_.end(); 60 } 61 62 private: 63 std::set<std::string> string_set_; 64 }; 65 66 // Process a string of wordaround type IDs (seperated by ',') and set up 67 // the corresponding Workaround flags. 68 void StringToWorkarounds( 69 const std::string& types, FeatureInfo::Workarounds* workarounds) { 70 DCHECK(workarounds); 71 std::vector<std::string> pieces; 72 base::SplitString(types, ',', &pieces); 73 for (size_t i = 0; i < pieces.size(); ++i) { 74 int number = 0; 75 bool succeed = base::StringToInt(pieces[i], &number); 76 DCHECK(succeed); 77 switch (number) { 78 #define GPU_OP(type, name) \ 79 case gpu::type: \ 80 workarounds->name = true; \ 81 break; 82 GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP) 83 #undef GPU_OP 84 default: 85 NOTIMPLEMENTED(); 86 } 87 } 88 if (workarounds->max_texture_size_limit_4096) 89 workarounds->max_texture_size = 4096; 90 if (workarounds->max_cube_map_texture_size_limit_4096) 91 workarounds->max_cube_map_texture_size = 4096; 92 if (workarounds->max_cube_map_texture_size_limit_1024) 93 workarounds->max_cube_map_texture_size = 1024; 94 if (workarounds->max_cube_map_texture_size_limit_512) 95 workarounds->max_cube_map_texture_size = 512; 96 97 if (workarounds->max_fragment_uniform_vectors_32) 98 workarounds->max_fragment_uniform_vectors = 32; 99 if (workarounds->max_varying_vectors_16) 100 workarounds->max_varying_vectors = 16; 101 if (workarounds->max_vertex_uniform_vectors_256) 102 workarounds->max_vertex_uniform_vectors = 256; 103 } 104 105 } // anonymous namespace. 106 107 FeatureInfo::FeatureFlags::FeatureFlags() 108 : chromium_color_buffer_float_rgba(false), 109 chromium_color_buffer_float_rgb(false), 110 chromium_framebuffer_multisample(false), 111 chromium_sync_query(false), 112 use_core_framebuffer_multisample(false), 113 multisampled_render_to_texture(false), 114 use_img_for_multisampled_render_to_texture(false), 115 oes_standard_derivatives(false), 116 oes_egl_image_external(false), 117 oes_depth24(false), 118 oes_compressed_etc1_rgb8_texture(false), 119 packed_depth24_stencil8(false), 120 npot_ok(false), 121 enable_texture_float_linear(false), 122 enable_texture_half_float_linear(false), 123 angle_translated_shader_source(false), 124 angle_pack_reverse_row_order(false), 125 arb_texture_rectangle(false), 126 angle_instanced_arrays(false), 127 occlusion_query_boolean(false), 128 use_arb_occlusion_query2_for_occlusion_query_boolean(false), 129 use_arb_occlusion_query_for_occlusion_query_boolean(false), 130 native_vertex_array_object(false), 131 ext_texture_format_bgra8888(false), 132 enable_shader_name_hashing(false), 133 enable_samplers(false), 134 ext_draw_buffers(false), 135 ext_frag_depth(false), 136 ext_shader_texture_lod(false), 137 use_async_readpixels(false), 138 map_buffer_range(false), 139 ext_discard_framebuffer(false), 140 angle_depth_texture(false), 141 is_angle(false), 142 is_swiftshader(false), 143 angle_texture_usage(false), 144 ext_texture_storage(false), 145 chromium_path_rendering(false) { 146 } 147 148 FeatureInfo::Workarounds::Workarounds() : 149 #define GPU_OP(type, name) name(false), 150 GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP) 151 #undef GPU_OP 152 max_texture_size(0), 153 max_cube_map_texture_size(0), 154 max_fragment_uniform_vectors(0), 155 max_varying_vectors(0), 156 max_vertex_uniform_vectors(0) { 157 } 158 159 FeatureInfo::FeatureInfo() { 160 InitializeBasicState(*CommandLine::ForCurrentProcess()); 161 } 162 163 FeatureInfo::FeatureInfo(const CommandLine& command_line) { 164 InitializeBasicState(command_line); 165 } 166 167 void FeatureInfo::InitializeBasicState(const CommandLine& command_line) { 168 if (command_line.HasSwitch(switches::kGpuDriverBugWorkarounds)) { 169 std::string types = command_line.GetSwitchValueASCII( 170 switches::kGpuDriverBugWorkarounds); 171 StringToWorkarounds(types, &workarounds_); 172 } 173 feature_flags_.enable_shader_name_hashing = 174 !command_line.HasSwitch(switches::kDisableShaderNameHashing); 175 176 feature_flags_.is_swiftshader = 177 (command_line.GetSwitchValueASCII(switches::kUseGL) == "swiftshader"); 178 179 static const GLenum kAlphaTypes[] = { 180 GL_UNSIGNED_BYTE, 181 }; 182 static const GLenum kRGBTypes[] = { 183 GL_UNSIGNED_BYTE, 184 GL_UNSIGNED_SHORT_5_6_5, 185 }; 186 static const GLenum kRGBATypes[] = { 187 GL_UNSIGNED_BYTE, 188 GL_UNSIGNED_SHORT_4_4_4_4, 189 GL_UNSIGNED_SHORT_5_5_5_1, 190 }; 191 static const GLenum kLuminanceTypes[] = { 192 GL_UNSIGNED_BYTE, 193 }; 194 static const GLenum kLuminanceAlphaTypes[] = { 195 GL_UNSIGNED_BYTE, 196 }; 197 static const FormatInfo kFormatTypes[] = { 198 { GL_ALPHA, kAlphaTypes, arraysize(kAlphaTypes), }, 199 { GL_RGB, kRGBTypes, arraysize(kRGBTypes), }, 200 { GL_RGBA, kRGBATypes, arraysize(kRGBATypes), }, 201 { GL_LUMINANCE, kLuminanceTypes, arraysize(kLuminanceTypes), }, 202 { GL_LUMINANCE_ALPHA, kLuminanceAlphaTypes, 203 arraysize(kLuminanceAlphaTypes), } , 204 }; 205 for (size_t ii = 0; ii < arraysize(kFormatTypes); ++ii) { 206 const FormatInfo& info = kFormatTypes[ii]; 207 ValueValidator<GLenum>& validator = texture_format_validators_[info.format]; 208 for (size_t jj = 0; jj < info.count; ++jj) { 209 validator.AddValue(info.types[jj]); 210 } 211 } 212 } 213 214 bool FeatureInfo::Initialize() { 215 disallowed_features_ = DisallowedFeatures(); 216 InitializeFeatures(); 217 return true; 218 } 219 220 bool FeatureInfo::Initialize(const DisallowedFeatures& disallowed_features) { 221 disallowed_features_ = disallowed_features; 222 InitializeFeatures(); 223 return true; 224 } 225 226 void FeatureInfo::InitializeFeatures() { 227 // Figure out what extensions to turn on. 228 StringSet extensions( 229 reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS))); 230 231 const char* renderer_str = 232 reinterpret_cast<const char*>(glGetString(GL_RENDERER)); 233 if (renderer_str) { 234 feature_flags_.is_angle = StartsWithASCII(renderer_str, "ANGLE", true); 235 } 236 237 bool is_es3 = false; 238 const char* version_str = 239 reinterpret_cast<const char*>(glGetString(GL_VERSION)); 240 if (version_str) { 241 std::string lstr(base::StringToLowerASCII(std::string(version_str))); 242 is_es3 = (lstr.substr(0, 12) == "opengl es 3."); 243 } 244 245 AddExtensionString("GL_ANGLE_translated_shader_source"); 246 AddExtensionString("GL_CHROMIUM_async_pixel_transfers"); 247 AddExtensionString("GL_CHROMIUM_bind_uniform_location"); 248 AddExtensionString("GL_CHROMIUM_command_buffer_query"); 249 AddExtensionString("GL_CHROMIUM_command_buffer_latency_query"); 250 AddExtensionString("GL_CHROMIUM_copy_texture"); 251 AddExtensionString("GL_CHROMIUM_get_error_query"); 252 AddExtensionString("GL_CHROMIUM_lose_context"); 253 AddExtensionString("GL_CHROMIUM_pixel_transfer_buffer_object"); 254 AddExtensionString("GL_CHROMIUM_rate_limit_offscreen_context"); 255 AddExtensionString("GL_CHROMIUM_resize"); 256 AddExtensionString("GL_CHROMIUM_resource_safe"); 257 AddExtensionString("GL_CHROMIUM_strict_attribs"); 258 AddExtensionString("GL_CHROMIUM_texture_mailbox"); 259 AddExtensionString("GL_EXT_debug_marker"); 260 261 // OES_vertex_array_object is emulated if not present natively, 262 // so the extension string is always exposed. 263 AddExtensionString("GL_OES_vertex_array_object"); 264 265 if (!disallowed_features_.gpu_memory_manager) 266 AddExtensionString("GL_CHROMIUM_gpu_memory_manager"); 267 268 if (extensions.Contains("GL_ANGLE_translated_shader_source")) { 269 feature_flags_.angle_translated_shader_source = true; 270 } 271 272 // Check if we should allow GL_EXT_texture_compression_dxt1 and 273 // GL_EXT_texture_compression_s3tc. 274 bool enable_dxt1 = false; 275 bool enable_dxt3 = false; 276 bool enable_dxt5 = false; 277 bool have_s3tc = extensions.Contains("GL_EXT_texture_compression_s3tc"); 278 bool have_dxt3 = 279 have_s3tc || extensions.Contains("GL_ANGLE_texture_compression_dxt3"); 280 bool have_dxt5 = 281 have_s3tc || extensions.Contains("GL_ANGLE_texture_compression_dxt5"); 282 283 if (extensions.Contains("GL_EXT_texture_compression_dxt1") || have_s3tc) { 284 enable_dxt1 = true; 285 } 286 if (have_dxt3) { 287 enable_dxt3 = true; 288 } 289 if (have_dxt5) { 290 enable_dxt5 = true; 291 } 292 293 if (enable_dxt1) { 294 AddExtensionString("GL_EXT_texture_compression_dxt1"); 295 validators_.compressed_texture_format.AddValue( 296 GL_COMPRESSED_RGB_S3TC_DXT1_EXT); 297 validators_.compressed_texture_format.AddValue( 298 GL_COMPRESSED_RGBA_S3TC_DXT1_EXT); 299 } 300 301 if (enable_dxt3) { 302 // The difference between GL_EXT_texture_compression_s3tc and 303 // GL_CHROMIUM_texture_compression_dxt3 is that the former 304 // requires on the fly compression. The latter does not. 305 AddExtensionString("GL_CHROMIUM_texture_compression_dxt3"); 306 validators_.compressed_texture_format.AddValue( 307 GL_COMPRESSED_RGBA_S3TC_DXT3_EXT); 308 } 309 310 if (enable_dxt5) { 311 // The difference between GL_EXT_texture_compression_s3tc and 312 // GL_CHROMIUM_texture_compression_dxt5 is that the former 313 // requires on the fly compression. The latter does not. 314 AddExtensionString("GL_CHROMIUM_texture_compression_dxt5"); 315 validators_.compressed_texture_format.AddValue( 316 GL_COMPRESSED_RGBA_S3TC_DXT5_EXT); 317 } 318 319 // Check if we should enable GL_EXT_texture_filter_anisotropic. 320 if (extensions.Contains("GL_EXT_texture_filter_anisotropic")) { 321 AddExtensionString("GL_EXT_texture_filter_anisotropic"); 322 validators_.texture_parameter.AddValue( 323 GL_TEXTURE_MAX_ANISOTROPY_EXT); 324 validators_.g_l_state.AddValue( 325 GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT); 326 } 327 328 // Check if we should support GL_OES_packed_depth_stencil and/or 329 // GL_GOOGLE_depth_texture / GL_CHROMIUM_depth_texture. 330 // 331 // NOTE: GL_OES_depth_texture requires support for depth cubemaps. 332 // GL_ARB_depth_texture requires other features that 333 // GL_OES_packed_depth_stencil does not provide. 334 // 335 // Therefore we made up GL_GOOGLE_depth_texture / GL_CHROMIUM_depth_texture. 336 // 337 // GL_GOOGLE_depth_texture is legacy. As we exposed it into NaCl we can't 338 // get rid of it. 339 // 340 bool enable_depth_texture = false; 341 if (!workarounds_.disable_depth_texture && 342 (extensions.Contains("GL_ARB_depth_texture") || 343 extensions.Contains("GL_OES_depth_texture") || 344 extensions.Contains("GL_ANGLE_depth_texture") || is_es3)) { 345 enable_depth_texture = true; 346 feature_flags_.angle_depth_texture = 347 extensions.Contains("GL_ANGLE_depth_texture"); 348 } 349 350 if (enable_depth_texture) { 351 AddExtensionString("GL_CHROMIUM_depth_texture"); 352 AddExtensionString("GL_GOOGLE_depth_texture"); 353 texture_format_validators_[GL_DEPTH_COMPONENT].AddValue(GL_UNSIGNED_SHORT); 354 texture_format_validators_[GL_DEPTH_COMPONENT].AddValue(GL_UNSIGNED_INT); 355 validators_.texture_internal_format.AddValue(GL_DEPTH_COMPONENT); 356 validators_.texture_format.AddValue(GL_DEPTH_COMPONENT); 357 validators_.pixel_type.AddValue(GL_UNSIGNED_SHORT); 358 validators_.pixel_type.AddValue(GL_UNSIGNED_INT); 359 } 360 361 if (extensions.Contains("GL_EXT_packed_depth_stencil") || 362 extensions.Contains("GL_OES_packed_depth_stencil") || is_es3) { 363 AddExtensionString("GL_OES_packed_depth_stencil"); 364 feature_flags_.packed_depth24_stencil8 = true; 365 if (enable_depth_texture) { 366 texture_format_validators_[GL_DEPTH_STENCIL] 367 .AddValue(GL_UNSIGNED_INT_24_8); 368 validators_.texture_internal_format.AddValue(GL_DEPTH_STENCIL); 369 validators_.texture_format.AddValue(GL_DEPTH_STENCIL); 370 validators_.pixel_type.AddValue(GL_UNSIGNED_INT_24_8); 371 } 372 validators_.render_buffer_format.AddValue(GL_DEPTH24_STENCIL8); 373 } 374 375 if (is_es3 || extensions.Contains("GL_OES_vertex_array_object") || 376 extensions.Contains("GL_ARB_vertex_array_object") || 377 extensions.Contains("GL_APPLE_vertex_array_object")) { 378 feature_flags_.native_vertex_array_object = true; 379 } 380 381 // If we're using client_side_arrays we have to emulate 382 // vertex array objects since vertex array objects do not work 383 // with client side arrays. 384 if (workarounds_.use_client_side_arrays_for_stream_buffers) { 385 feature_flags_.native_vertex_array_object = false; 386 } 387 388 if (is_es3 || extensions.Contains("GL_OES_element_index_uint") || 389 gfx::HasDesktopGLFeatures()) { 390 AddExtensionString("GL_OES_element_index_uint"); 391 validators_.index_type.AddValue(GL_UNSIGNED_INT); 392 } 393 394 bool enable_texture_format_bgra8888 = false; 395 bool enable_read_format_bgra = false; 396 bool enable_render_buffer_bgra = false; 397 bool enable_immutable_texture_format_bgra_on_es3 = 398 extensions.Contains("GL_APPLE_texture_format_BGRA8888"); 399 400 // Check if we should allow GL_EXT_texture_format_BGRA8888 401 if (extensions.Contains("GL_EXT_texture_format_BGRA8888") || 402 enable_immutable_texture_format_bgra_on_es3 || 403 extensions.Contains("GL_EXT_bgra")) { 404 enable_texture_format_bgra8888 = true; 405 } 406 407 if (extensions.Contains("GL_EXT_bgra")) { 408 enable_render_buffer_bgra = true; 409 } 410 411 if (extensions.Contains("GL_EXT_read_format_bgra") || 412 extensions.Contains("GL_EXT_bgra")) { 413 enable_read_format_bgra = true; 414 } 415 416 if (enable_texture_format_bgra8888) { 417 feature_flags_.ext_texture_format_bgra8888 = true; 418 AddExtensionString("GL_EXT_texture_format_BGRA8888"); 419 texture_format_validators_[GL_BGRA_EXT].AddValue(GL_UNSIGNED_BYTE); 420 validators_.texture_internal_format.AddValue(GL_BGRA_EXT); 421 validators_.texture_format.AddValue(GL_BGRA_EXT); 422 } 423 424 if (enable_read_format_bgra) { 425 AddExtensionString("GL_EXT_read_format_bgra"); 426 validators_.read_pixel_format.AddValue(GL_BGRA_EXT); 427 } 428 429 if (enable_render_buffer_bgra) { 430 AddExtensionString("GL_CHROMIUM_renderbuffer_format_BGRA8888"); 431 validators_.render_buffer_format.AddValue(GL_BGRA8_EXT); 432 } 433 434 if (extensions.Contains("GL_OES_rgb8_rgba8") || gfx::HasDesktopGLFeatures()) { 435 AddExtensionString("GL_OES_rgb8_rgba8"); 436 validators_.render_buffer_format.AddValue(GL_RGB8_OES); 437 validators_.render_buffer_format.AddValue(GL_RGBA8_OES); 438 } 439 440 // Check if we should allow GL_OES_texture_npot 441 if (is_es3 || extensions.Contains("GL_ARB_texture_non_power_of_two") || 442 extensions.Contains("GL_OES_texture_npot")) { 443 AddExtensionString("GL_OES_texture_npot"); 444 feature_flags_.npot_ok = true; 445 } 446 447 // Check if we should allow GL_OES_texture_float, GL_OES_texture_half_float, 448 // GL_OES_texture_float_linear, GL_OES_texture_half_float_linear 449 bool enable_texture_float = false; 450 bool enable_texture_float_linear = false; 451 bool enable_texture_half_float = false; 452 bool enable_texture_half_float_linear = false; 453 454 bool may_enable_chromium_color_buffer_float = false; 455 456 if (extensions.Contains("GL_ARB_texture_float")) { 457 enable_texture_float = true; 458 enable_texture_float_linear = true; 459 enable_texture_half_float = true; 460 enable_texture_half_float_linear = true; 461 may_enable_chromium_color_buffer_float = true; 462 } else { 463 if (is_es3 || extensions.Contains("GL_OES_texture_float")) { 464 enable_texture_float = true; 465 if (extensions.Contains("GL_OES_texture_float_linear")) { 466 enable_texture_float_linear = true; 467 } 468 if ((is_es3 && extensions.Contains("GL_EXT_color_buffer_float")) || 469 feature_flags_.is_angle) { 470 may_enable_chromium_color_buffer_float = true; 471 } 472 } 473 // TODO(dshwang): GLES3 supports half float by default but GL_HALF_FLOAT_OES 474 // isn't equal to GL_HALF_FLOAT. 475 if (extensions.Contains("GL_OES_texture_half_float")) { 476 enable_texture_half_float = true; 477 if (extensions.Contains("GL_OES_texture_half_float_linear")) { 478 enable_texture_half_float_linear = true; 479 } 480 } 481 } 482 483 if (enable_texture_float) { 484 texture_format_validators_[GL_ALPHA].AddValue(GL_FLOAT); 485 texture_format_validators_[GL_RGB].AddValue(GL_FLOAT); 486 texture_format_validators_[GL_RGBA].AddValue(GL_FLOAT); 487 texture_format_validators_[GL_LUMINANCE].AddValue(GL_FLOAT); 488 texture_format_validators_[GL_LUMINANCE_ALPHA].AddValue(GL_FLOAT); 489 validators_.pixel_type.AddValue(GL_FLOAT); 490 validators_.read_pixel_type.AddValue(GL_FLOAT); 491 AddExtensionString("GL_OES_texture_float"); 492 if (enable_texture_float_linear) { 493 AddExtensionString("GL_OES_texture_float_linear"); 494 } 495 } 496 497 if (enable_texture_half_float) { 498 texture_format_validators_[GL_ALPHA].AddValue(GL_HALF_FLOAT_OES); 499 texture_format_validators_[GL_RGB].AddValue(GL_HALF_FLOAT_OES); 500 texture_format_validators_[GL_RGBA].AddValue(GL_HALF_FLOAT_OES); 501 texture_format_validators_[GL_LUMINANCE].AddValue(GL_HALF_FLOAT_OES); 502 texture_format_validators_[GL_LUMINANCE_ALPHA].AddValue(GL_HALF_FLOAT_OES); 503 validators_.pixel_type.AddValue(GL_HALF_FLOAT_OES); 504 validators_.read_pixel_type.AddValue(GL_HALF_FLOAT_OES); 505 AddExtensionString("GL_OES_texture_half_float"); 506 if (enable_texture_half_float_linear) { 507 AddExtensionString("GL_OES_texture_half_float_linear"); 508 } 509 } 510 511 if (may_enable_chromium_color_buffer_float) { 512 COMPILE_ASSERT(GL_RGBA32F_ARB == GL_RGBA32F && 513 GL_RGBA32F_EXT == GL_RGBA32F && 514 GL_RGB32F_ARB == GL_RGB32F && 515 GL_RGB32F_EXT == GL_RGB32F, 516 sized_float_internal_format_variations_must_match); 517 // We don't check extension support beyond ARB_texture_float on desktop GL, 518 // and format support varies between GL configurations. For example, spec 519 // prior to OpenGL 3.0 mandates framebuffer support only for one 520 // implementation-chosen format, and ES3.0 EXT_color_buffer_float does not 521 // support rendering to RGB32F. Check for framebuffer completeness with 522 // formats that the extensions expose, and only enable an extension when a 523 // framebuffer created with its texture format is reported as complete. 524 GLint fb_binding = 0; 525 GLint tex_binding = 0; 526 glGetIntegerv(GL_FRAMEBUFFER_BINDING, &fb_binding); 527 glGetIntegerv(GL_TEXTURE_BINDING_2D, &tex_binding); 528 529 GLuint tex_id = 0; 530 GLuint fb_id = 0; 531 GLsizei width = 16; 532 533 glGenTextures(1, &tex_id); 534 glGenFramebuffersEXT(1, &fb_id); 535 glBindTexture(GL_TEXTURE_2D, tex_id); 536 // Nearest filter needed for framebuffer completeness on some drivers. 537 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 538 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, width, 0, GL_RGBA, 539 GL_FLOAT, NULL); 540 glBindFramebufferEXT(GL_FRAMEBUFFER, fb_id); 541 glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 542 GL_TEXTURE_2D, tex_id, 0); 543 GLenum statusRGBA = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER); 544 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, width, width, 0, GL_RGB, 545 GL_FLOAT, NULL); 546 GLenum statusRGB = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER); 547 glDeleteFramebuffersEXT(1, &fb_id); 548 glDeleteTextures(1, &tex_id); 549 550 glBindFramebufferEXT(GL_FRAMEBUFFER, static_cast<GLuint>(fb_binding)); 551 glBindTexture(GL_TEXTURE_2D, static_cast<GLuint>(tex_binding)); 552 553 DCHECK(glGetError() == GL_NO_ERROR); 554 555 if (statusRGBA == GL_FRAMEBUFFER_COMPLETE) { 556 validators_.texture_internal_format.AddValue(GL_RGBA32F); 557 feature_flags_.chromium_color_buffer_float_rgba = true; 558 AddExtensionString("GL_CHROMIUM_color_buffer_float_rgba"); 559 } 560 if (statusRGB == GL_FRAMEBUFFER_COMPLETE) { 561 validators_.texture_internal_format.AddValue(GL_RGB32F); 562 feature_flags_.chromium_color_buffer_float_rgb = true; 563 AddExtensionString("GL_CHROMIUM_color_buffer_float_rgb"); 564 } 565 } 566 567 // Check for multisample support 568 if (!workarounds_.disable_multisampling) { 569 bool ext_has_multisample = 570 extensions.Contains("GL_EXT_framebuffer_multisample") || is_es3; 571 if (feature_flags_.is_angle) { 572 ext_has_multisample |= 573 extensions.Contains("GL_ANGLE_framebuffer_multisample"); 574 } 575 feature_flags_.use_core_framebuffer_multisample = is_es3; 576 if (ext_has_multisample) { 577 feature_flags_.chromium_framebuffer_multisample = true; 578 validators_.frame_buffer_target.AddValue(GL_READ_FRAMEBUFFER_EXT); 579 validators_.frame_buffer_target.AddValue(GL_DRAW_FRAMEBUFFER_EXT); 580 validators_.g_l_state.AddValue(GL_READ_FRAMEBUFFER_BINDING_EXT); 581 validators_.g_l_state.AddValue(GL_MAX_SAMPLES_EXT); 582 validators_.render_buffer_parameter.AddValue(GL_RENDERBUFFER_SAMPLES_EXT); 583 AddExtensionString("GL_CHROMIUM_framebuffer_multisample"); 584 } 585 if (extensions.Contains("GL_EXT_multisampled_render_to_texture")) { 586 feature_flags_.multisampled_render_to_texture = true; 587 } else if (extensions.Contains("GL_IMG_multisampled_render_to_texture")) { 588 feature_flags_.multisampled_render_to_texture = true; 589 feature_flags_.use_img_for_multisampled_render_to_texture = true; 590 } 591 if (feature_flags_.multisampled_render_to_texture) { 592 validators_.render_buffer_parameter.AddValue( 593 GL_RENDERBUFFER_SAMPLES_EXT); 594 validators_.g_l_state.AddValue(GL_MAX_SAMPLES_EXT); 595 validators_.frame_buffer_parameter.AddValue( 596 GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_SAMPLES_EXT); 597 AddExtensionString("GL_EXT_multisampled_render_to_texture"); 598 } 599 } 600 601 if (extensions.Contains("GL_OES_depth24") || gfx::HasDesktopGLFeatures() || 602 is_es3) { 603 AddExtensionString("GL_OES_depth24"); 604 feature_flags_.oes_depth24 = true; 605 validators_.render_buffer_format.AddValue(GL_DEPTH_COMPONENT24); 606 } 607 608 if (!workarounds_.disable_oes_standard_derivatives && 609 (is_es3 || extensions.Contains("GL_OES_standard_derivatives") || 610 gfx::HasDesktopGLFeatures())) { 611 AddExtensionString("GL_OES_standard_derivatives"); 612 feature_flags_.oes_standard_derivatives = true; 613 validators_.hint_target.AddValue(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES); 614 validators_.g_l_state.AddValue(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES); 615 } 616 617 if (extensions.Contains("GL_OES_EGL_image_external")) { 618 AddExtensionString("GL_OES_EGL_image_external"); 619 feature_flags_.oes_egl_image_external = true; 620 validators_.texture_bind_target.AddValue(GL_TEXTURE_EXTERNAL_OES); 621 validators_.get_tex_param_target.AddValue(GL_TEXTURE_EXTERNAL_OES); 622 validators_.texture_parameter.AddValue(GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES); 623 validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_EXTERNAL_OES); 624 } 625 626 if (extensions.Contains("GL_OES_compressed_ETC1_RGB8_texture")) { 627 AddExtensionString("GL_OES_compressed_ETC1_RGB8_texture"); 628 feature_flags_.oes_compressed_etc1_rgb8_texture = true; 629 validators_.compressed_texture_format.AddValue(GL_ETC1_RGB8_OES); 630 } 631 632 if (extensions.Contains("GL_AMD_compressed_ATC_texture")) { 633 AddExtensionString("GL_AMD_compressed_ATC_texture"); 634 validators_.compressed_texture_format.AddValue( 635 GL_ATC_RGB_AMD); 636 validators_.compressed_texture_format.AddValue( 637 GL_ATC_RGBA_EXPLICIT_ALPHA_AMD); 638 validators_.compressed_texture_format.AddValue( 639 GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD); 640 } 641 642 if (extensions.Contains("GL_IMG_texture_compression_pvrtc")) { 643 AddExtensionString("GL_IMG_texture_compression_pvrtc"); 644 validators_.compressed_texture_format.AddValue( 645 GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG); 646 validators_.compressed_texture_format.AddValue( 647 GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG); 648 validators_.compressed_texture_format.AddValue( 649 GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG); 650 validators_.compressed_texture_format.AddValue( 651 GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG); 652 } 653 654 // Ideally we would only expose this extension on Mac OS X, to 655 // support GL_CHROMIUM_iosurface and the compositor. We don't want 656 // applications to start using it; they should use ordinary non- 657 // power-of-two textures. However, for unit testing purposes we 658 // expose it on all supported platforms. 659 if (extensions.Contains("GL_ARB_texture_rectangle")) { 660 AddExtensionString("GL_ARB_texture_rectangle"); 661 feature_flags_.arb_texture_rectangle = true; 662 validators_.texture_bind_target.AddValue(GL_TEXTURE_RECTANGLE_ARB); 663 // For the moment we don't add this enum to the texture_target 664 // validator. This implies that the only way to get image data into a 665 // rectangular texture is via glTexImageIOSurface2DCHROMIUM, which is 666 // just fine since again we don't want applications depending on this 667 // extension. 668 validators_.get_tex_param_target.AddValue(GL_TEXTURE_RECTANGLE_ARB); 669 validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_RECTANGLE_ARB); 670 } 671 672 #if defined(OS_MACOSX) 673 AddExtensionString("GL_CHROMIUM_iosurface"); 674 #endif 675 676 // TODO(gman): Add support for these extensions. 677 // GL_OES_depth32 678 679 feature_flags_.enable_texture_float_linear |= enable_texture_float_linear; 680 feature_flags_.enable_texture_half_float_linear |= 681 enable_texture_half_float_linear; 682 683 if (extensions.Contains("GL_ANGLE_pack_reverse_row_order")) { 684 AddExtensionString("GL_ANGLE_pack_reverse_row_order"); 685 feature_flags_.angle_pack_reverse_row_order = true; 686 validators_.pixel_store.AddValue(GL_PACK_REVERSE_ROW_ORDER_ANGLE); 687 validators_.g_l_state.AddValue(GL_PACK_REVERSE_ROW_ORDER_ANGLE); 688 } 689 690 if (extensions.Contains("GL_ANGLE_texture_usage")) { 691 feature_flags_.angle_texture_usage = true; 692 AddExtensionString("GL_ANGLE_texture_usage"); 693 validators_.texture_parameter.AddValue(GL_TEXTURE_USAGE_ANGLE); 694 } 695 696 // Note: Only APPLE_texture_format_BGRA8888 extension allows BGRA8_EXT in 697 // ES3's glTexStorage2D. We prefer support BGRA to texture storage. 698 // So we don't expose GL_EXT_texture_storage when ES3 + 699 // GL_EXT_texture_format_BGRA8888 because we fail the GL_BGRA8 requirement. 700 // However we expose GL_EXT_texture_storage when just ES3 because we don't 701 // claim to handle GL_BGRA8. 702 bool support_texture_storage_on_es3 = 703 (is_es3 && enable_immutable_texture_format_bgra_on_es3) || 704 (is_es3 && !enable_texture_format_bgra8888); 705 if (extensions.Contains("GL_EXT_texture_storage") || 706 extensions.Contains("GL_ARB_texture_storage") || 707 support_texture_storage_on_es3) { 708 feature_flags_.ext_texture_storage = true; 709 AddExtensionString("GL_EXT_texture_storage"); 710 validators_.texture_parameter.AddValue(GL_TEXTURE_IMMUTABLE_FORMAT_EXT); 711 if (enable_texture_format_bgra8888) 712 validators_.texture_internal_format_storage.AddValue(GL_BGRA8_EXT); 713 if (enable_texture_float) { 714 validators_.texture_internal_format_storage.AddValue(GL_RGBA32F_EXT); 715 validators_.texture_internal_format_storage.AddValue(GL_RGB32F_EXT); 716 validators_.texture_internal_format_storage.AddValue(GL_ALPHA32F_EXT); 717 validators_.texture_internal_format_storage.AddValue( 718 GL_LUMINANCE32F_EXT); 719 validators_.texture_internal_format_storage.AddValue( 720 GL_LUMINANCE_ALPHA32F_EXT); 721 } 722 if (enable_texture_half_float) { 723 validators_.texture_internal_format_storage.AddValue(GL_RGBA16F_EXT); 724 validators_.texture_internal_format_storage.AddValue(GL_RGB16F_EXT); 725 validators_.texture_internal_format_storage.AddValue(GL_ALPHA16F_EXT); 726 validators_.texture_internal_format_storage.AddValue( 727 GL_LUMINANCE16F_EXT); 728 validators_.texture_internal_format_storage.AddValue( 729 GL_LUMINANCE_ALPHA16F_EXT); 730 } 731 } 732 733 bool have_ext_occlusion_query_boolean = 734 extensions.Contains("GL_EXT_occlusion_query_boolean"); 735 bool have_arb_occlusion_query2 = 736 extensions.Contains("GL_ARB_occlusion_query2"); 737 bool have_arb_occlusion_query = 738 extensions.Contains("GL_ARB_occlusion_query"); 739 740 if (!workarounds_.disable_ext_occlusion_query && 741 (have_ext_occlusion_query_boolean || 742 have_arb_occlusion_query2 || 743 have_arb_occlusion_query)) { 744 AddExtensionString("GL_EXT_occlusion_query_boolean"); 745 feature_flags_.occlusion_query_boolean = true; 746 feature_flags_.use_arb_occlusion_query2_for_occlusion_query_boolean = 747 !have_ext_occlusion_query_boolean && have_arb_occlusion_query2; 748 feature_flags_.use_arb_occlusion_query_for_occlusion_query_boolean = 749 !have_ext_occlusion_query_boolean && have_arb_occlusion_query && 750 !have_arb_occlusion_query2; 751 } 752 753 if (!workarounds_.disable_angle_instanced_arrays && 754 (extensions.Contains("GL_ANGLE_instanced_arrays") || 755 (extensions.Contains("GL_ARB_instanced_arrays") && 756 extensions.Contains("GL_ARB_draw_instanced")) || 757 is_es3)) { 758 AddExtensionString("GL_ANGLE_instanced_arrays"); 759 feature_flags_.angle_instanced_arrays = true; 760 validators_.vertex_attribute.AddValue(GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE); 761 } 762 763 if (!workarounds_.disable_ext_draw_buffers && 764 (extensions.Contains("GL_ARB_draw_buffers") || 765 extensions.Contains("GL_EXT_draw_buffers"))) { 766 AddExtensionString("GL_EXT_draw_buffers"); 767 feature_flags_.ext_draw_buffers = true; 768 769 GLint max_color_attachments = 0; 770 glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &max_color_attachments); 771 for (GLenum i = GL_COLOR_ATTACHMENT1_EXT; 772 i < static_cast<GLenum>(GL_COLOR_ATTACHMENT0 + max_color_attachments); 773 ++i) { 774 validators_.attachment.AddValue(i); 775 } 776 COMPILE_ASSERT(GL_COLOR_ATTACHMENT0_EXT == GL_COLOR_ATTACHMENT0, 777 color_attachment0_variation_must_match); 778 779 validators_.g_l_state.AddValue(GL_MAX_COLOR_ATTACHMENTS_EXT); 780 validators_.g_l_state.AddValue(GL_MAX_DRAW_BUFFERS_ARB); 781 GLint max_draw_buffers = 0; 782 glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_draw_buffers); 783 for (GLenum i = GL_DRAW_BUFFER0_ARB; 784 i < static_cast<GLenum>(GL_DRAW_BUFFER0_ARB + max_draw_buffers); 785 ++i) { 786 validators_.g_l_state.AddValue(i); 787 } 788 } 789 790 if (is_es3 || extensions.Contains("GL_EXT_blend_minmax") || 791 gfx::HasDesktopGLFeatures()) { 792 AddExtensionString("GL_EXT_blend_minmax"); 793 validators_.equation.AddValue(GL_MIN_EXT); 794 validators_.equation.AddValue(GL_MAX_EXT); 795 COMPILE_ASSERT(GL_MIN_EXT == GL_MIN && GL_MAX_EXT == GL_MAX, 796 min_max_variations_must_match); 797 } 798 799 // TODO(dshwang): GLES3 supports gl_FragDepth, not gl_FragDepthEXT. 800 if (extensions.Contains("GL_EXT_frag_depth") || gfx::HasDesktopGLFeatures()) { 801 AddExtensionString("GL_EXT_frag_depth"); 802 feature_flags_.ext_frag_depth = true; 803 } 804 805 if (extensions.Contains("GL_EXT_shader_texture_lod") || 806 gfx::HasDesktopGLFeatures()) { 807 AddExtensionString("GL_EXT_shader_texture_lod"); 808 feature_flags_.ext_shader_texture_lod = true; 809 } 810 811 #if !defined(OS_MACOSX) 812 if (workarounds_.disable_egl_khr_fence_sync) { 813 gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync = false; 814 } 815 if (workarounds_.disable_egl_khr_wait_sync) { 816 gfx::g_driver_egl.ext.b_EGL_KHR_wait_sync = false; 817 } 818 #endif 819 if (workarounds_.disable_arb_sync) 820 gfx::g_driver_gl.ext.b_GL_ARB_sync = false; 821 bool ui_gl_fence_works = gfx::GLFence::IsSupported(); 822 UMA_HISTOGRAM_BOOLEAN("GPU.FenceSupport", ui_gl_fence_works); 823 824 feature_flags_.map_buffer_range = 825 is_es3 || extensions.Contains("GL_ARB_map_buffer_range"); 826 827 // Really it's part of core OpenGL 2.1 and up, but let's assume the 828 // extension is still advertised. 829 bool has_pixel_buffers = 830 is_es3 || extensions.Contains("GL_ARB_pixel_buffer_object"); 831 832 // We will use either glMapBuffer() or glMapBufferRange() for async readbacks. 833 if (has_pixel_buffers && ui_gl_fence_works && 834 !workarounds_.disable_async_readpixels) { 835 feature_flags_.use_async_readpixels = true; 836 } 837 838 if (is_es3 || extensions.Contains("GL_ARB_sampler_objects")) { 839 feature_flags_.enable_samplers = true; 840 // TODO(dsinclair): Add AddExtensionString("GL_CHROMIUM_sampler_objects") 841 // when available. 842 } 843 844 if ((is_es3 || extensions.Contains("GL_EXT_discard_framebuffer")) && 845 !workarounds_.disable_ext_discard_framebuffer) { 846 // DiscardFramebufferEXT is automatically bound to InvalidateFramebuffer. 847 AddExtensionString("GL_EXT_discard_framebuffer"); 848 feature_flags_.ext_discard_framebuffer = true; 849 } 850 851 if (ui_gl_fence_works) { 852 AddExtensionString("GL_CHROMIUM_sync_query"); 853 feature_flags_.chromium_sync_query = true; 854 } 855 856 if (extensions.Contains("GL_NV_path_rendering")) { 857 if (extensions.Contains("GL_EXT_direct_state_access") || is_es3) { 858 AddExtensionString("GL_CHROMIUM_path_rendering"); 859 feature_flags_.chromium_path_rendering = true; 860 validators_.g_l_state.AddValue(GL_PATH_MODELVIEW_MATRIX_CHROMIUM); 861 validators_.g_l_state.AddValue(GL_PATH_PROJECTION_MATRIX_CHROMIUM); 862 } 863 } 864 } 865 866 void FeatureInfo::AddExtensionString(const char* s) { 867 std::string str(s); 868 size_t pos = extensions_.find(str); 869 while (pos != std::string::npos && 870 pos + str.length() < extensions_.length() && 871 extensions_.substr(pos + str.length(), 1) != " ") { 872 // This extension name is a substring of another. 873 pos = extensions_.find(str, pos + str.length()); 874 } 875 if (pos == std::string::npos) { 876 extensions_ += (extensions_.empty() ? "" : " ") + str; 877 } 878 } 879 880 FeatureInfo::~FeatureInfo() { 881 } 882 883 } // namespace gles2 884 } // namespace gpu 885
