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

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• Hash : a0586d6e
  Author :
  Date : 2024-10-26T00:32:27
  

  Remove feature description / condition strings
  
  These strings show up in chrome://gpu so they can marginally be useful,
  but are otherwise dead weight for most uses of ANGLE / users of ANGLE.
  While slightly less convenient, the feature name can always be linked
  back to the source code if needed so the presence of such metadata is
  not necessary either.
  
  This shaves 40KB from the binary size of ANGLE when built with Vulkan
  only on Android.
  
  Bug: chromium:371512561
  Change-Id: I3959961bb7de95cc60a85130d0ff38a7fd533fb7
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5968453
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• include/platform/Feature.h

• //
  // Copyright 2019 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.
  //
  // Feature.h: Definition of structs to hold feature/workaround information.
  //
  
  #ifndef ANGLE_PLATFORM_FEATURE_H_
  #define ANGLE_PLATFORM_FEATURE_H_
  
  #include <map>
  #include <string>
  #include <vector>
  
  #define ANGLE_FEATURE_CONDITION(set, feature, cond)           \
      do                                                        \
      {                                                         \
          if (!(set)->feature.hasOverride)                      \
          {                                                     \
              (set)->feature.enabled   = cond;                  \
          }                                                     \
      } while (0)
  
  namespace angle
  {
  
  enum class FeatureCategory
  {
      FrontendFeatures,
      FrontendWorkarounds,
      OpenGLWorkarounds,
      OpenGLFeatures,
      D3DWorkarounds,
      VulkanFeatures,
      VulkanWorkarounds,
      VulkanAppWorkarounds,
      MetalFeatures,
      MetalWorkarounds,
  };
  
  constexpr char kFeatureCategoryFrontendWorkarounds[]  = "Frontend workarounds";
  constexpr char kFeatureCategoryFrontendFeatures[]     = "Frontend features";
  constexpr char kFeatureCategoryOpenGLWorkarounds[]    = "OpenGL workarounds";
  constexpr char kFeatureCategoryOpenGLFeatures[]       = "OpenGL features";
  constexpr char kFeatureCategoryD3DWorkarounds[]       = "D3D workarounds";
  constexpr char kFeatureCategoryVulkanAppWorkarounds[] = "Vulkan app workarounds";
  constexpr char kFeatureCategoryVulkanWorkarounds[]    = "Vulkan workarounds";
  constexpr char kFeatureCategoryVulkanFeatures[]       = "Vulkan features";
  constexpr char kFeatureCategoryMetalFeatures[]        = "Metal features";
  constexpr char kFeatureCategoryMetalWorkarounds[]     = "Metal workarounds";
  constexpr char kFeatureCategoryUnknown[]              = "Unknown";
  
  inline const char *FeatureCategoryToString(const FeatureCategory &fc)
  {
      switch (fc)
      {
          case FeatureCategory::FrontendFeatures:
              return kFeatureCategoryFrontendFeatures;
              break;
  
          case FeatureCategory::FrontendWorkarounds:
              return kFeatureCategoryFrontendWorkarounds;
              break;
  
          case FeatureCategory::OpenGLWorkarounds:
              return kFeatureCategoryOpenGLWorkarounds;
              break;
  
          case FeatureCategory::OpenGLFeatures:
              return kFeatureCategoryOpenGLFeatures;
              break;
  
          case FeatureCategory::D3DWorkarounds:
              return kFeatureCategoryD3DWorkarounds;
              break;
  
          case FeatureCategory::VulkanFeatures:
              return kFeatureCategoryVulkanFeatures;
              break;
  
          case FeatureCategory::VulkanWorkarounds:
              return kFeatureCategoryVulkanWorkarounds;
              break;
  
          case FeatureCategory::VulkanAppWorkarounds:
              return kFeatureCategoryVulkanAppWorkarounds;
              break;
  
          case FeatureCategory::MetalFeatures:
              return kFeatureCategoryMetalFeatures;
              break;
  
          case FeatureCategory::MetalWorkarounds:
              return kFeatureCategoryMetalWorkarounds;
              break;
  
          default:
              return kFeatureCategoryUnknown;
              break;
      }
  }
  
  constexpr char kFeatureStatusEnabled[]  = "enabled";
  constexpr char kFeatureStatusDisabled[] = "disabled";
  
  inline const char *FeatureStatusToString(const bool &status)
  {
      if (status)
      {
          return kFeatureStatusEnabled;
      }
      return kFeatureStatusDisabled;
  }
  
  struct FeatureInfo;
  
  using FeatureMap  = std::map<std::string, FeatureInfo *>;
  using FeatureList = std::vector<const FeatureInfo *>;
  
  struct FeatureInfo
  {
      FeatureInfo(const FeatureInfo &other);
      FeatureInfo(const char *name, const FeatureCategory &category, FeatureMap *const mapPtr);
      ~FeatureInfo();
  
      void applyOverride(bool state);
  
      // The name of the workaround
      const char *const name;
  
      // The category that the workaround belongs to. Eg. "Vulkan workarounds"
      const FeatureCategory category;
  
      // Whether the workaround is enabled or not. Determined by heuristics like vendor ID and
      // version, but may be overriden to any value.
      bool enabled = false;
  
      // Whether this feature has an override applied to it, and the condition to
      // enable it should not be checked.
      bool hasOverride = false;
  };
  
  inline FeatureInfo::FeatureInfo(const FeatureInfo &other) = default;
  inline FeatureInfo::FeatureInfo(const char *name,
                                  const FeatureCategory &category,
                                  FeatureMap *const mapPtr)
      : name(name), category(category), enabled(false)
  {
      if (mapPtr != nullptr)
      {
          (*mapPtr)[std::string(name)] = this;
      }
  }
  
  inline FeatureInfo::~FeatureInfo() = default;
  
  struct FeatureSetBase
  {
    public:
      FeatureSetBase();
      ~FeatureSetBase();
  
    private:
      // Non-copyable
      FeatureSetBase(const FeatureSetBase &other)            = delete;
      FeatureSetBase &operator=(const FeatureSetBase &other) = delete;
  
    protected:
      FeatureMap members = FeatureMap();
  
    public:
      void reset();
      void overrideFeatures(const std::vector<std::string> &featureNames, bool enabled);
      void populateFeatureList(FeatureList *features) const;
  
      const FeatureMap &getFeatures() const { return members; }
  };
  
  inline FeatureSetBase::FeatureSetBase()  = default;
  inline FeatureSetBase::~FeatureSetBase() = default;
  
  }  // namespace angle
  
  #endif  // ANGLE_PLATFORM_WORKAROUND_H_
  

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