kc3-lang/angle/include/platform/FrontendFeatures.h

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• Hash : 2f45d93d
  Author :
  Date : 2021-08-18T16:58:44
  

  Capture/Replay: Init shader outputs during self-tests.
  
  This forces all uninitialized variables to have default values.
  For instance if the application doesn't initialize the output
  color, or a varying that's use in the output, this will ensure we
  don't use any undefined values in the computation.
  
  Found when working on a re-trace of T-Rex, which doesn't write to
  the alpha channel in the final rendering pass. Also fixes undefined
  values in GLSLTest.InactiveVaryingInVertexActiveInFragment.
  
  Bug: angleproject:5133
  Change-Id: Ia291338e5adf23dab5263cb2ebe737dc05852d3e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3110225
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  

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• include/platform/FrontendFeatures.h

• //
  // Copyright 2016 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // FrontendFeatures.h: Features/workarounds for driver bugs and other behaviors seen
  // on all platforms.
  
  #ifndef ANGLE_PLATFORM_FRONTENDFEATURES_H_
  #define ANGLE_PLATFORM_FRONTENDFEATURES_H_
  
  #include "platform/Feature.h"
  
  namespace angle
  {
  
  struct FrontendFeatures : angle::FeatureSetBase
  {
      FrontendFeatures();
      ~FrontendFeatures();
  
      // Force the context to be lost (via KHR_robustness) if a GL_OUT_OF_MEMORY error occurs. The
      // driver may be in an inconsistent state if this happens, and some users of ANGLE rely on this
      // notification to prevent further execution.
      angle::Feature loseContextOnOutOfMemory = {
          "lose_context_on_out_of_memory", angle::FeatureCategory::FrontendWorkarounds,
          "Some users rely on a lost context notification if a GL_OUT_OF_MEMORY "
          "error occurs",
          &members};
  
      // Program binaries don't contain transform feedback varyings on Qualcomm GPUs.
      // Work around this by disabling the program cache for programs with transform feedback.
      angle::Feature disableProgramCachingForTransformFeedback = {
          "disable_program_caching_for_transform_feedback",
          angle::FeatureCategory::FrontendWorkarounds,
          "On some GPUs, program binaries don't contain transform feedback varyings", &members};
  
      // On Windows Intel OpenGL drivers TexImage sometimes seems to interact with the Framebuffer.
      // Flaky crashes can occur unless we sync the Framebuffer bindings. The workaround is to add
      // Framebuffer binding dirty bits to TexImage updates. See http://anglebug.com/2906
      angle::Feature syncFramebufferBindingsOnTexImage = {
          "sync_framebuffer_bindings_on_tex_image", angle::FeatureCategory::FrontendWorkarounds,
          "On some drivers TexImage sometimes seems to interact "
          "with the Framebuffer",
          &members};
  
      angle::Feature scalarizeVecAndMatConstructorArgs = {
          "scalarize_vec_and_mat_constructor_args", angle::FeatureCategory::FrontendWorkarounds,
          "Always rewrite vec/mat constructors to be consistent", &members,
          "http://crbug.com/1165751"};
  
      // Disable support for GL_OES_get_program_binary
      angle::Feature disableProgramBinary = {
          "disable_program_binary", angle::FeatureCategory::FrontendFeatures,
          "Disable support for GL_OES_get_program_binary", &members, "http://anglebug.com/5007"};
  
      // Allow disabling of GL_EXT_texture_filter_anisotropic through a runtime feature for
      // performance comparisons.
      angle::Feature disableAnisotropicFiltering = {
          "disable_anisotropic_filtering", angle::FeatureCategory::FrontendWorkarounds,
          "Disable support for anisotropic filtering", &members};
  
      // We can use this feature to override compressed format support for portability.
      angle::Feature allowCompressedFormats = {"allow_compressed_formats",
                                               angle::FeatureCategory::FrontendWorkarounds,
                                               "Allow compressed formats", &members};
  
      angle::Feature captureLimits = {"enable_capture_limits",
                                      angle::FeatureCategory::FrontendFeatures,
                                      "Set the context limits like frame capturing was enabled",
                                      &members, "http://anglebug.com/5750"};
  
      // Whether we should compress pipeline cache in thread pool before it's stored in blob cache.
      // http://anglebug.com/4722
      angle::Feature enableCompressingPipelineCacheInThreadPool = {
          "enableCompressingPipelineCacheInThreadPool", angle::FeatureCategory::FrontendWorkarounds,
          "Enable compressing pipeline cache in thread pool.", &members, "http://anglebug.com/4722"};
  
      // Forces on robust resource init. Useful for some tests to avoid undefined values.
      angle::Feature forceRobustResourceInit = {
          "forceRobustResourceInit", angle::FeatureCategory::FrontendFeatures,
          "Force-enable robust resource init", &members, "http://anglebug.com/6041"};
  
      // Forces on shader output initialization to avoid undefined values in tests. Normally this
      // feature is only enabled for WebGL.
      angle::Feature forceInitShaderOutputVariables = {
          "forceInitShaderOutputVariables", angle::FeatureCategory::FrontendFeatures,
          "Force-enable shader output variable initialization", &members};
  };
  
  inline FrontendFeatures::FrontendFeatures()  = default;
  inline FrontendFeatures::~FrontendFeatures() = default;
  
  }  // namespace angle
  
  #endif  // ANGLE_PLATFORM_FRONTENDFEATURES_H_
  

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