1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/gl/GLContextFeatures.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,540 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +
1.10 +#include "GLContext.h"
1.11 +#include "nsPrintfCString.h"
1.12 +
1.13 +#ifdef XP_MACOSX
1.14 +#include "nsCocoaFeatures.h"
1.15 +#endif
1.16 +
1.17 +namespace mozilla {
1.18 +namespace gl {
1.19 +
1.20 +const size_t kMAX_EXTENSION_GROUP_SIZE = 5;
1.21 +
1.22 +// ARB_ES2_compatibility is natively supported in OpenGL 4.1.
1.23 +static const unsigned int kGLCoreVersionForES2Compat = 410;
1.24 +
1.25 +// ARB_ES3_compatibility is natively supported in OpenGL 4.3.
1.26 +static const unsigned int kGLCoreVersionForES3Compat = 430;
1.27 +
1.28 +struct FeatureInfo
1.29 +{
1.30 + const char* mName;
1.31 + unsigned int mOpenGLVersion;
1.32 + unsigned int mOpenGLESVersion;
1.33 + GLContext::GLExtensions mExtensions[kMAX_EXTENSION_GROUP_SIZE];
1.34 +};
1.35 +
1.36 +static const FeatureInfo sFeatureInfoArr[] = {
1.37 + {
1.38 + "bind_buffer_offset",
1.39 + 0, // OpenGL version
1.40 + 0, // OpenGL ES version
1.41 + {
1.42 + GLContext::EXT_transform_feedback,
1.43 + GLContext::NV_transform_feedback,
1.44 + GLContext::Extensions_End
1.45 + }
1.46 + },
1.47 + {
1.48 + "blend_minmax",
1.49 + 200, // OpenGL version
1.50 + 300, // OpenGL ES version
1.51 + {
1.52 + GLContext::EXT_blend_minmax,
1.53 + GLContext::Extensions_End
1.54 + }
1.55 + },
1.56 + {
1.57 + "depth_texture",
1.58 + 200, // OpenGL version
1.59 + 300, // OpenGL ES version
1.60 + {
1.61 + GLContext::ARB_depth_texture,
1.62 + GLContext::OES_depth_texture,
1.63 + // Intentionally avoid putting ANGLE_depth_texture here,
1.64 + // it does not offer quite the same functionality.
1.65 + GLContext::Extensions_End
1.66 + }
1.67 + },
1.68 + {
1.69 + "draw_buffers",
1.70 + 200, // OpenGL version
1.71 + 300, // OpenGL ES version
1.72 + {
1.73 + GLContext::ARB_draw_buffers,
1.74 + GLContext::EXT_draw_buffers,
1.75 + GLContext::Extensions_End
1.76 + }
1.77 + },
1.78 + {
1.79 + "draw_instanced",
1.80 + 310, // OpenGL version
1.81 + 300, // OpenGL ES version
1.82 + {
1.83 + GLContext::ARB_draw_instanced,
1.84 + GLContext::EXT_draw_instanced,
1.85 + GLContext::NV_draw_instanced,
1.86 + GLContext::ANGLE_instanced_arrays,
1.87 + GLContext::Extensions_End
1.88 + }
1.89 + },
1.90 + {
1.91 + "draw_range_elements",
1.92 + 120, // OpenGL version
1.93 + 300, // OpenGL ES version
1.94 + {
1.95 + GLContext::EXT_draw_range_elements,
1.96 + GLContext::Extensions_End
1.97 + }
1.98 + },
1.99 + {
1.100 + "element_index_uint",
1.101 + 200, // OpenGL version
1.102 + 300, // OpenGL ES version
1.103 + {
1.104 + GLContext::OES_element_index_uint,
1.105 + GLContext::Extensions_End
1.106 + }
1.107 + },
1.108 + {
1.109 + "ES2_compatibility",
1.110 + kGLCoreVersionForES2Compat,
1.111 + 200, // OpenGL ES version
1.112 + {
1.113 + GLContext::ARB_ES2_compatibility,
1.114 + GLContext::Extensions_End
1.115 + }
1.116 + },
1.117 + {
1.118 + "ES3_compatibility",
1.119 + kGLCoreVersionForES3Compat,
1.120 + 300, // OpenGL ES version
1.121 + {
1.122 + GLContext::ARB_ES3_compatibility,
1.123 + GLContext::Extensions_End
1.124 + }
1.125 + },
1.126 + {
1.127 + // Removes clamping for float color outputs from frag shaders.
1.128 + "frag_color_float",
1.129 + 300, // OpenGL version
1.130 + 300, // OpenGL ES version
1.131 + {
1.132 + GLContext::ARB_color_buffer_float,
1.133 + GLContext::EXT_color_buffer_float,
1.134 + GLContext::EXT_color_buffer_half_float,
1.135 + GLContext::Extensions_End
1.136 + }
1.137 + },
1.138 + {
1.139 + "frag_depth",
1.140 + 200, // OpenGL version
1.141 + 300, // OpenGL ES version
1.142 + {
1.143 + GLContext::EXT_frag_depth,
1.144 + GLContext::Extensions_End
1.145 + }
1.146 + },
1.147 + {
1.148 + "framebuffer_blit",
1.149 + 300, // OpenGL version
1.150 + 300, // OpenGL ES version
1.151 + {
1.152 + GLContext::EXT_framebuffer_blit,
1.153 + GLContext::ANGLE_framebuffer_blit,
1.154 + GLContext::Extensions_End
1.155 + }
1.156 + },
1.157 + {
1.158 + "framebuffer_multisample",
1.159 + 300, // OpenGL version
1.160 + 300, // OpenGL ES version
1.161 + {
1.162 + GLContext::EXT_framebuffer_multisample,
1.163 + GLContext::ANGLE_framebuffer_multisample,
1.164 + GLContext::Extensions_End
1.165 + }
1.166 + },
1.167 + {
1.168 + "framebuffer_object",
1.169 + 300, // OpenGL version
1.170 + 200, // OpenGL ES version
1.171 + {
1.172 + GLContext::ARB_framebuffer_object,
1.173 + GLContext::EXT_framebuffer_object,
1.174 + GLContext::Extensions_End
1.175 + }
1.176 + },
1.177 + {
1.178 + "get_query_object_iv",
1.179 + 200, // OpenGL version
1.180 + 0, // OpenGL ES version
1.181 + {
1.182 + GLContext::Extensions_End
1.183 + }
1.184 + /*
1.185 + * XXX_get_query_object_iv only provide GetQueryObjectiv provided by
1.186 + * ARB_occlusion_query (added by OpenGL 2.0).
1.187 + */
1.188 + },
1.189 + {
1.190 + "instanced_arrays",
1.191 + 330, // OpenGL version
1.192 + 300, // OpenGL ES version
1.193 + {
1.194 + GLContext::ARB_instanced_arrays,
1.195 + GLContext::NV_instanced_arrays,
1.196 + GLContext::ANGLE_instanced_arrays,
1.197 + GLContext::Extensions_End
1.198 + }
1.199 + },
1.200 + {
1.201 + "instanced_non_arrays",
1.202 + 330, // OpenGL version
1.203 + 300, // OpenGL ES version
1.204 + {
1.205 + GLContext::ARB_instanced_arrays,
1.206 + GLContext::Extensions_End
1.207 + }
1.208 + /* This is an expanded version of `instanced_arrays` that allows for all
1.209 + * enabled active attrib arrays to have non-zero divisors.
1.210 + * ANGLE_instanced_arrays and NV_instanced_arrays forbid this, but GLES3
1.211 + * has no such restriction.
1.212 + */
1.213 + },
1.214 + {
1.215 + "occlusion_query",
1.216 + 200, // OpenGL version
1.217 + 0, // OpenGL ES version
1.218 + {
1.219 + GLContext::Extensions_End
1.220 + }
1.221 + // XXX_occlusion_query depend on ARB_occlusion_query (added in OpenGL 2.0)
1.222 + },
1.223 + {
1.224 + "occlusion_query_boolean",
1.225 + kGLCoreVersionForES3Compat,
1.226 + 300, // OpenGL ES version
1.227 + {
1.228 + GLContext::ARB_ES3_compatibility,
1.229 + GLContext::EXT_occlusion_query_boolean,
1.230 + GLContext::Extensions_End
1.231 + }
1.232 + /*
1.233 + * XXX_occlusion_query_boolean provide ANY_SAMPLES_PASSED_CONSERVATIVE,
1.234 + * but EXT_occlusion_query_boolean is only a OpenGL ES extension. But
1.235 + * it is supported on desktop if ARB_ES3_compatibility because
1.236 + * EXT_occlusion_query_boolean (added in OpenGL ES 3.0).
1.237 + */
1.238 + },
1.239 + {
1.240 + "occlusion_query2",
1.241 + 330, // = min(330, kGLCoreVersionForES3Compat),
1.242 + 300, // OpenGL ES version
1.243 + {
1.244 + GLContext::ARB_occlusion_query2,
1.245 + GLContext::ARB_ES3_compatibility,
1.246 + GLContext::EXT_occlusion_query_boolean,
1.247 + GLContext::Extensions_End
1.248 + }
1.249 + /*
1.250 + * XXX_occlusion_query2 (add in OpenGL 3.3) provide ANY_SAMPLES_PASSED,
1.251 + * which is provided by ARB_occlusion_query2, EXT_occlusion_query_boolean
1.252 + * (added in OpenGL ES 3.0) and ARB_ES3_compatibility
1.253 + */
1.254 + },
1.255 + {
1.256 + "packed_depth_stencil",
1.257 + 300, // OpenGL version
1.258 + 300, // OpenGL ES version
1.259 + {
1.260 + GLContext::EXT_packed_depth_stencil,
1.261 + GLContext::OES_packed_depth_stencil,
1.262 + GLContext::Extensions_End
1.263 + }
1.264 + },
1.265 + {
1.266 + "query_objects",
1.267 + 200, // OpenGL version
1.268 + 300, // OpenGL ES version
1.269 + {
1.270 + GLContext::EXT_occlusion_query_boolean,
1.271 + GLContext::Extensions_End
1.272 + }
1.273 + /*
1.274 + * XXX_query_objects only provide entry points commonly supported by
1.275 + * ARB_occlusion_query (added in OpenGL 2.0) and EXT_occlusion_query_boolean
1.276 + * (added in OpenGL ES 3.0)
1.277 + */
1.278 + },
1.279 + {
1.280 + "renderbuffer_float",
1.281 + 300, // OpenGL version
1.282 + 300, // OpenGL ES version
1.283 + {
1.284 + GLContext::ARB_texture_float,
1.285 + GLContext::EXT_color_buffer_float,
1.286 + GLContext::Extensions_End
1.287 + }
1.288 + },
1.289 + {
1.290 + "renderbuffer_half_float",
1.291 + 300, // OpenGL version
1.292 + 300, // OpenGL ES version
1.293 + {
1.294 + GLContext::ARB_texture_float,
1.295 + GLContext::EXT_color_buffer_half_float,
1.296 + GLContext::Extensions_End
1.297 + }
1.298 + },
1.299 + {
1.300 + "robustness",
1.301 + 0, // OpenGL version
1.302 + 0, // OpenGL ES version
1.303 + {
1.304 + GLContext::ARB_robustness,
1.305 + GLContext::EXT_robustness,
1.306 + GLContext::Extensions_End
1.307 + }
1.308 + },
1.309 + {
1.310 + "sRGB",
1.311 + 300, // OpenGL version
1.312 + 300, // OpenGL ES version
1.313 + {
1.314 + GLContext::EXT_sRGB,
1.315 + GLContext::Extensions_End
1.316 + }
1.317 + },
1.318 + {
1.319 + "standard_derivatives",
1.320 + 200, // OpenGL version
1.321 + 300, // OpenGL ES version
1.322 + {
1.323 + GLContext::OES_standard_derivatives,
1.324 + GLContext::Extensions_End
1.325 + }
1.326 + },
1.327 + {
1.328 + "texture_float",
1.329 + 300, // OpenGL version
1.330 + 300, // OpenGL ES version
1.331 + {
1.332 + GLContext::ARB_texture_float,
1.333 + GLContext::OES_texture_float,
1.334 + GLContext::Extensions_End
1.335 + }
1.336 + },
1.337 + {
1.338 + "texture_float_linear",
1.339 + 310, // OpenGL version
1.340 + 300, // OpenGL ES version
1.341 + {
1.342 + GLContext::ARB_texture_float,
1.343 + GLContext::OES_texture_float_linear,
1.344 + GLContext::Extensions_End
1.345 + }
1.346 + },
1.347 + {
1.348 + "texture_half_float",
1.349 + 300, // OpenGL version
1.350 + 300, // OpenGL ES version
1.351 + {
1.352 + GLContext::ARB_half_float_pixel,
1.353 + GLContext::ARB_texture_float,
1.354 + GLContext::NV_half_float,
1.355 + GLContext::Extensions_End
1.356 + }
1.357 + /**
1.358 + * We are not including OES_texture_half_float in this feature, because:
1.359 + * GL_HALF_FLOAT = 0x140B
1.360 + * GL_HALF_FLOAT_ARB = 0x140B == GL_HALF_FLOAT
1.361 + * GL_HALF_FLOAT_NV = 0x140B == GL_HALF_FLOAT
1.362 + * GL_HALF_FLOAT_OES = 0x8D61 != GL_HALF_FLOAT
1.363 + * WebGL handles this specifically with an OES_texture_half_float check.
1.364 + */
1.365 + },
1.366 + {
1.367 + "texture_half_float_linear",
1.368 + 310, // OpenGL version
1.369 + 300, // OpenGL ES version
1.370 + {
1.371 + GLContext::ARB_half_float_pixel,
1.372 + GLContext::ARB_texture_float,
1.373 + GLContext::NV_half_float,
1.374 + GLContext::OES_texture_half_float_linear,
1.375 + GLContext::Extensions_End
1.376 + }
1.377 + },
1.378 + {
1.379 + "texture_non_power_of_two",
1.380 + 200, // OpenGL version
1.381 + 300, // OpenGL ES version
1.382 + {
1.383 + GLContext::ARB_texture_non_power_of_two,
1.384 + GLContext::OES_texture_npot,
1.385 + GLContext::Extensions_End
1.386 + }
1.387 + },
1.388 + {
1.389 + "transform_feedback",
1.390 + 300, // OpenGL version
1.391 + 300, // OpenGL ES version
1.392 + {
1.393 + GLContext::EXT_transform_feedback,
1.394 + GLContext::NV_transform_feedback,
1.395 + GLContext::Extensions_End
1.396 + }
1.397 + },
1.398 + {
1.399 + "vertex_array_object",
1.400 + 300, // OpenGL version
1.401 + 300, // OpenGL ES version
1.402 + {
1.403 + GLContext::ARB_vertex_array_object,
1.404 + GLContext::OES_vertex_array_object,
1.405 + GLContext::APPLE_vertex_array_object,
1.406 + GLContext::Extensions_End
1.407 + }
1.408 + }
1.409 +};
1.410 +
1.411 +static inline const FeatureInfo&
1.412 +GetFeatureInfo(GLFeature feature)
1.413 +{
1.414 + static_assert(MOZ_ARRAY_LENGTH(sFeatureInfoArr) == size_t(GLFeature::EnumMax),
1.415 + "Mismatched lengths for sFeatureInfoInfos and GLFeature enums");
1.416 +
1.417 + MOZ_ASSERT(feature < GLFeature::EnumMax,
1.418 + "GLContext::GetFeatureInfoInfo : unknown <feature>");
1.419 +
1.420 + return sFeatureInfoArr[size_t(feature)];
1.421 +}
1.422 +
1.423 +static inline uint32_t
1.424 +ProfileVersionForFeature(GLFeature feature, ContextProfile profile)
1.425 +{
1.426 + MOZ_ASSERT(profile != ContextProfile::Unknown,
1.427 + "GLContext::ProfileVersionForFeature : unknown <profile>");
1.428 +
1.429 + const FeatureInfo& featureInfo = GetFeatureInfo(feature);
1.430 +
1.431 + if (profile == ContextProfile::OpenGLES) {
1.432 + return featureInfo.mOpenGLESVersion;
1.433 + }
1.434 +
1.435 + return featureInfo.mOpenGLVersion;
1.436 +}
1.437 +
1.438 +static inline bool
1.439 +IsFeatureIsPartOfProfileVersion(GLFeature feature,
1.440 + ContextProfile profile, unsigned int version)
1.441 +{
1.442 + unsigned int profileVersion = ProfileVersionForFeature(feature, profile);
1.443 +
1.444 + /**
1.445 + * if `profileVersion` is zero, it means that no version of the profile
1.446 + * added support for the feature.
1.447 + */
1.448 + return profileVersion && version >= profileVersion;
1.449 +}
1.450 +
1.451 +const char*
1.452 +GLContext::GetFeatureName(GLFeature feature)
1.453 +{
1.454 + return GetFeatureInfo(feature).mName;
1.455 +}
1.456 +
1.457 +static bool
1.458 +CanReadSRGBFromFBOTexture(GLContext* gl)
1.459 +{
1.460 + if (!gl->WorkAroundDriverBugs())
1.461 + return true;
1.462 +
1.463 +#ifdef XP_MACOSX
1.464 + // Bug 843668:
1.465 + // MacOSX 10.6 reports to support EXT_framebuffer_sRGB and
1.466 + // EXT_texture_sRGB but fails to convert from sRGB to linear
1.467 + // when writing to an sRGB texture attached to an FBO.
1.468 + if (!nsCocoaFeatures::OnLionOrLater()) {
1.469 + return false;
1.470 + }
1.471 +#endif // XP_MACOSX
1.472 + return true;
1.473 +}
1.474 +
1.475 +void
1.476 +GLContext::InitFeatures()
1.477 +{
1.478 + for (size_t feature_index = 0; feature_index < size_t(GLFeature::EnumMax); feature_index++)
1.479 + {
1.480 + GLFeature feature = GLFeature(feature_index);
1.481 +
1.482 + if (IsFeatureIsPartOfProfileVersion(feature, mProfile, mVersion)) {
1.483 + mAvailableFeatures[feature_index] = true;
1.484 + continue;
1.485 + }
1.486 +
1.487 + mAvailableFeatures[feature_index] = false;
1.488 +
1.489 + const FeatureInfo& featureInfo = GetFeatureInfo(feature);
1.490 +
1.491 + for (size_t j = 0; true; j++)
1.492 + {
1.493 + MOZ_ASSERT(j < kMAX_EXTENSION_GROUP_SIZE, "kMAX_EXTENSION_GROUP_SIZE too small");
1.494 +
1.495 + if (featureInfo.mExtensions[j] == GLContext::Extensions_End) {
1.496 + break;
1.497 + }
1.498 +
1.499 + if (IsExtensionSupported(featureInfo.mExtensions[j])) {
1.500 + mAvailableFeatures[feature_index] = true;
1.501 + break;
1.502 + }
1.503 + }
1.504 + }
1.505 +
1.506 + // Bug 843668: Work around limitation of the feature system.
1.507 + // For sRGB support under OpenGL to match OpenGL ES spec, check for both
1.508 + // EXT_texture_sRGB and EXT_framebuffer_sRGB is required.
1.509 + const bool aresRGBExtensionsAvailable =
1.510 + IsExtensionSupported(EXT_texture_sRGB) &&
1.511 + (IsExtensionSupported(ARB_framebuffer_sRGB) ||
1.512 + IsExtensionSupported(EXT_framebuffer_sRGB));
1.513 +
1.514 + mAvailableFeatures[size_t(GLFeature::sRGB)] =
1.515 + aresRGBExtensionsAvailable &&
1.516 + CanReadSRGBFromFBOTexture(this);
1.517 +}
1.518 +
1.519 +void
1.520 +GLContext::MarkUnsupported(GLFeature feature)
1.521 +{
1.522 + mAvailableFeatures[size_t(feature)] = false;
1.523 +
1.524 + const FeatureInfo& featureInfo = GetFeatureInfo(feature);
1.525 +
1.526 + for (size_t i = 0; true; i++)
1.527 + {
1.528 + MOZ_ASSERT(i < kMAX_EXTENSION_GROUP_SIZE, "kMAX_EXTENSION_GROUP_SIZE too small");
1.529 +
1.530 + if (featureInfo.mExtensions[i] == GLContext::Extensions_End) {
1.531 + break;
1.532 + }
1.533 +
1.534 + MarkExtensionUnsupported(featureInfo.mExtensions[i]);
1.535 + }
1.536 +
1.537 + MOZ_ASSERT(!IsSupported(feature), "GLContext::MarkUnsupported has failed!");
1.538 +
1.539 + NS_WARNING(nsPrintfCString("%s marked as unsupported", GetFeatureName(feature)).get());
1.540 +}
1.541 +
1.542 +} /* namespace gl */
1.543 +} /* namespace mozilla */
