text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_EXTENSIONS_3D_UTIL_H_
  #define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_EXTENSIONS_3D_UTIL_H_
  
  #include <memory>
  
  #include "base/macros.h"
  #include "third_party/blink/renderer/platform/platform_export.h"
  #include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
  #include "third_party/blink/renderer/platform/wtf/hash_set.h"
  #include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
  #include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
  #include "third_party/khronos/GLES2/gl2.h"
  
  namespace gpu {
  namespace gles2 {
  class GLES2Interface;
  }
  }
  
  namespace blink {
  
  class PLATFORM_EXPORT Extensions3DUtil final {
    USING_FAST_MALLOC(Extensions3DUtil);
  
   public:
    // Creates a new Extensions3DUtil. If the passed GLES2Interface has been
    // spontaneously lost, returns null.
    static std::unique_ptr<Extensions3DUtil> Create(gpu::gles2::GLES2Interface*);
    ~Extensions3DUtil();
  
    bool IsValid() { return is_valid_; }
  
    bool SupportsExtension(const String& name);
    bool EnsureExtensionEnabled(const String& name);
    bool IsExtensionEnabled(const String& name);
  
    static bool CanUseCopyTextureCHROMIUM(GLenum dest_target);
  
   private:
    Extensions3DUtil(gpu::gles2::GLES2Interface*);
    void InitializeExtensions();
  
    gpu::gles2::GLES2Interface* gl_;
    HashSet<String> enabled_extensions_;
    HashSet<String> requestable_extensions_;
    bool is_valid_;
  
    DISALLOW_COPY_AND_ASSIGN(Extensions3DUtil);
  };
  
  }  // namespace blink
  
  #endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_GPU_EXTENSIONS_3D_UTIL_H_
  