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

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• Author : Geoff Lang
  Date : 2020-06-30 17:03:56
  Hash : a568b7e3
  Message : Add a frontend feature to disable anisotropic filtering. This allows us to disable support for GL_EXT_texture_filter_anisotropic at runtime and make performance comparisons. Bug: b/167404532 Change-Id: Id80458e7f116e195366432fe73e8e776e9a3047b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2278024 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com> Reviewed-by: Tim Van Patten <timvp@google.com>

• 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/398694"};
  
      // 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};
  };
  
  inline FrontendFeatures::FrontendFeatures()  = default;
  inline FrontendFeatures::~FrontendFeatures() = default;
  
  }  // namespace angle
  
  #endif  // ANGLE_PLATFORM_FRONTENDFEATURES_H_