Revert "Delete CC."

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
new file mode 100644
index 0000000000000000000000000000000000000000..9116319758d3b0c1c89ce5f6996fb3fa61e6a539
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+++ b/cc/resources/resource_provider.h
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+// Copyright 2012 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 CC_RESOURCES_RESOURCE_PROVIDER_H_
+#define CC_RESOURCES_RESOURCE_PROVIDER_H_
+
+#include <deque>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/containers/hash_tables.h"
+#include "base/memory/linked_ptr.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "cc/output/context_provider.h"
+#include "cc/output/output_surface.h"
+#include "cc/resources/release_callback_impl.h"
+#include "cc/resources/resource_format.h"
+#include "cc/resources/return_callback.h"
+#include "cc/resources/shared_bitmap.h"
+#include "cc/resources/single_release_callback_impl.h"
+#include "cc/resources/texture_mailbox.h"
+#include "cc/resources/transferable_resource.h"
+#include "third_party/khronos/GLES2/gl2.h"
+#include "third_party/khronos/GLES2/gl2ext.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/geometry/size.h"
+
+class GrContext;
+
+namespace gpu {
+class GpuMemoryBufferManager;
+namespace gles {
+class GLES2Interface;
+}
+}
+
+namespace gfx {
+class GpuMemoryBuffer;
+class Rect;
+class Vector2d;
+}
+
+namespace cc {
+class BlockingTaskRunner;
+class IdAllocator;
+class SharedBitmap;
+class SharedBitmapManager;
+class TextureUploader;
+
+// This class is not thread-safe and can only be called from the thread it was
+// created on (in practice, the impl thread).
+class ResourceProvider {
+ private:
+  struct Resource;
+
+ public:
+  typedef unsigned ResourceId;
+  typedef std::vector<ResourceId> ResourceIdArray;
+  typedef std::set<ResourceId> ResourceIdSet;
+  typedef base::hash_map<ResourceId, ResourceId> ResourceIdMap;
+  enum TextureHint {
+    TEXTURE_HINT_DEFAULT = 0x0,
+    TEXTURE_HINT_IMMUTABLE = 0x1,
+    TEXTURE_HINT_FRAMEBUFFER = 0x2,
+    TEXTURE_HINT_IMMUTABLE_FRAMEBUFFER =
+        TEXTURE_HINT_IMMUTABLE | TEXTURE_HINT_FRAMEBUFFER
+  };
+  enum ResourceType {
+    RESOURCE_TYPE_INVALID = 0,
+    RESOURCE_TYPE_GL_TEXTURE = 1,
+    RESOURCE_TYPE_BITMAP,
+  };
+
+  static scoped_ptr<ResourceProvider> Create(
+      OutputSurface* output_surface,
+      SharedBitmapManager* shared_bitmap_manager,
+      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
+      BlockingTaskRunner* blocking_main_thread_task_runner,
+      int highp_threshold_min,
+      bool use_rgba_4444_texture_format,
+      size_t id_allocation_chunk_size);
+  virtual ~ResourceProvider();
+
+  void InitializeSoftware();
+  void InitializeGL();
+
+  void DidLoseOutputSurface() { lost_output_surface_ = true; }
+
+  int max_texture_size() const { return max_texture_size_; }
+  ResourceFormat memory_efficient_texture_format() const {
+    return use_rgba_4444_texture_format_ ? RGBA_4444 : best_texture_format_;
+  }
+  ResourceFormat best_texture_format() const { return best_texture_format_; }
+  ResourceFormat yuv_resource_format() const { return yuv_resource_format_; }
+  bool use_sync_query() const { return use_sync_query_; }
+  size_t num_resources() const { return resources_.size(); }
+
+  // Checks whether a resource is in use by a consumer.
+  bool InUseByConsumer(ResourceId id);
+
+  bool IsLost(ResourceId id);
+  bool AllowOverlay(ResourceId id);
+
+  // Producer interface.
+
+  ResourceType default_resource_type() const { return default_resource_type_; }
+  ResourceType GetResourceType(ResourceId id);
+
+  // Creates a resource of the default resource type.
+  ResourceId CreateResource(const gfx::Size& size,
+                            GLint wrap_mode,
+                            TextureHint hint,
+                            ResourceFormat format);
+
+  // Creates a resource which is tagged as being managed for GPU memory
+  // accounting purposes.
+  ResourceId CreateManagedResource(const gfx::Size& size,
+                                   GLenum target,
+                                   GLint wrap_mode,
+                                   TextureHint hint,
+                                   ResourceFormat format);
+
+  // You can also explicitly create a specific resource type.
+  ResourceId CreateGLTexture(const gfx::Size& size,
+                             GLenum target,
+                             GLenum texture_pool,
+                             GLint wrap_mode,
+                             TextureHint hint,
+                             ResourceFormat format);
+
+  ResourceId CreateBitmap(const gfx::Size& size, GLint wrap_mode);
+  // Wraps an IOSurface into a GL resource.
+  ResourceId CreateResourceFromIOSurface(const gfx::Size& size,
+                                         unsigned io_surface_id);
+
+  // Wraps an external texture mailbox into a GL resource.
+  ResourceId CreateResourceFromTextureMailbox(
+      const TextureMailbox& mailbox,
+      scoped_ptr<SingleReleaseCallbackImpl> release_callback_impl);
+
+  void DeleteResource(ResourceId id);
+
+  // Update pixels from image, copying source_rect (in image) to dest_offset (in
+  // the resource).
+  // NOTE: DEPRECATED. Use CopyToResource() instead.
+  void SetPixels(ResourceId id,
+                 const uint8_t* image,
+                 const gfx::Rect& image_rect,
+                 const gfx::Rect& source_rect,
+                 const gfx::Vector2d& dest_offset);
+  void CopyToResource(ResourceId id,
+                      const uint8_t* image,
+                      const gfx::Size& image_size);
+
+  // Check upload status.
+  size_t NumBlockingUploads();
+  void MarkPendingUploadsAsNonBlocking();
+  size_t EstimatedUploadsPerTick();
+  void FlushUploads();
+  void ReleaseCachedData();
+  base::TimeTicks EstimatedUploadCompletionTime(size_t uploads_per_tick);
+
+  // Only flush the command buffer if supported.
+  // Returns true if the shallow flush occurred, false otherwise.
+  bool ShallowFlushIfSupported();
+
+  // Creates accounting for a child. Returns a child ID.
+  int CreateChild(const ReturnCallback& return_callback);
+
+  // Destroys accounting for the child, deleting all accounted resources.
+  void DestroyChild(int child);
+
+  // Gets the child->parent resource ID map.
+  const ResourceIdMap& GetChildToParentMap(int child) const;
+
+  // Prepares resources to be transfered to the parent, moving them to
+  // mailboxes and serializing meta-data into TransferableResources.
+  // Resources are not removed from the ResourceProvider, but are marked as
+  // "in use".
+  void PrepareSendToParent(const ResourceIdArray& resources,
+                           TransferableResourceArray* transferable_resources);
+
+  // Receives resources from a child, moving them from mailboxes. Resource IDs
+  // passed are in the child namespace, and will be translated to the parent
+  // namespace, added to the child->parent map.
+  // This adds the resources to the working set in the ResourceProvider without
+  // declaring which resources are in use. Use DeclareUsedResourcesFromChild
+  // after calling this method to do that. All calls to ReceiveFromChild should
+  // be followed by a DeclareUsedResourcesFromChild.
+  // NOTE: if the sync_point is set on any TransferableResource, this will
+  // wait on it.
+  void ReceiveFromChild(
+      int child, const TransferableResourceArray& transferable_resources);
+
+  // Once a set of resources have been received, they may or may not be used.
+  // This declares what set of resources are currently in use from the child,
+  // releasing any other resources back to the child.
+  void DeclareUsedResourcesFromChild(
+      int child,
+      const ResourceIdArray& resources_from_child);
+
+  // Receives resources from the parent, moving them from mailboxes. Resource
+  // IDs passed are in the child namespace.
+  // NOTE: if the sync_point is set on any TransferableResource, this will
+  // wait on it.
+  void ReceiveReturnsFromParent(
+      const ReturnedResourceArray& transferable_resources);
+
+  // The following lock classes are part of the ResourceProvider API and are
+  // needed to read and write the resource contents. The user must ensure
+  // that they only use GL locks on GL resources, etc, and this is enforced
+  // by assertions.
+  class ScopedReadLockGL {
+   public:
+    ScopedReadLockGL(ResourceProvider* resource_provider,
+                     ResourceProvider::ResourceId resource_id);
+    virtual ~ScopedReadLockGL();
+
+    unsigned texture_id() const { return texture_id_; }
+
+   protected:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::ResourceId resource_id_;
+
+   private:
+    unsigned texture_id_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedReadLockGL);
+  };
+
+  class ScopedSamplerGL : public ScopedReadLockGL {
+   public:
+    ScopedSamplerGL(ResourceProvider* resource_provider,
+                    ResourceProvider::ResourceId resource_id,
+                    GLenum filter);
+    ScopedSamplerGL(ResourceProvider* resource_provider,
+                    ResourceProvider::ResourceId resource_id,
+                    GLenum unit,
+                    GLenum filter);
+    ~ScopedSamplerGL() override;
+
+    GLenum target() const { return target_; }
+
+   private:
+    GLenum unit_;
+    GLenum target_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedSamplerGL);
+  };
+
+  class ScopedWriteLockGL {
+   public:
+    ScopedWriteLockGL(ResourceProvider* resource_provider,
+                      ResourceProvider::ResourceId resource_id);
+    ~ScopedWriteLockGL();
+
+    unsigned texture_id() const { return texture_id_; }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    unsigned texture_id_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGL);
+  };
+
+  class ScopedReadLockSoftware {
+   public:
+    ScopedReadLockSoftware(ResourceProvider* resource_provider,
+                           ResourceProvider::ResourceId resource_id);
+    ~ScopedReadLockSoftware();
+
+    const SkBitmap* sk_bitmap() const {
+      DCHECK(valid());
+      return &sk_bitmap_;
+    }
+    GLint wrap_mode() const { return wrap_mode_; }
+
+    bool valid() const { return !!sk_bitmap_.getPixels(); }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::ResourceId resource_id_;
+    SkBitmap sk_bitmap_;
+    GLint wrap_mode_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedReadLockSoftware);
+  };
+
+  class ScopedWriteLockSoftware {
+   public:
+    ScopedWriteLockSoftware(ResourceProvider* resource_provider,
+                            ResourceProvider::ResourceId resource_id);
+    ~ScopedWriteLockSoftware();
+
+    SkBitmap& sk_bitmap() { return sk_bitmap_; }
+    bool valid() const { return !!sk_bitmap_.getPixels(); }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    SkBitmap sk_bitmap_;
+    base::ThreadChecker thread_checker_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockSoftware);
+  };
+
+  class ScopedWriteLockGpuMemoryBuffer {
+   public:
+    ScopedWriteLockGpuMemoryBuffer(ResourceProvider* resource_provider,
+                                   ResourceProvider::ResourceId resource_id);
+    ~ScopedWriteLockGpuMemoryBuffer();
+
+    gfx::GpuMemoryBuffer* GetGpuMemoryBuffer();
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+    gfx::GpuMemoryBuffer* gpu_memory_buffer_;
+    gfx::Size size_;
+    ResourceFormat format_;
+    base::ThreadChecker thread_checker_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBuffer);
+  };
+
+  class ScopedWriteLockGr {
+   public:
+    ScopedWriteLockGr(ResourceProvider* resource_provider,
+                      ResourceProvider::ResourceId resource_id);
+    ~ScopedWriteLockGr();
+
+    void InitSkSurface(bool use_worker_context,
+                       bool use_distance_field_text,
+                       bool can_use_lcd_text,
+                       int msaa_sample_count);
+    void ReleaseSkSurface();
+
+    SkSurface* sk_surface() { return sk_surface_.get(); }
+    ResourceProvider::Resource* resource() { return resource_; }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    base::ThreadChecker thread_checker_;
+    skia::RefPtr<SkSurface> sk_surface_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGr);
+  };
+
+  class Fence : public base::RefCounted<Fence> {
+   public:
+    Fence() {}
+
+    virtual void Set() = 0;
+    virtual bool HasPassed() = 0;
+    virtual void Wait() = 0;
+
+   protected:
+    friend class base::RefCounted<Fence>;
+    virtual ~Fence() {}
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(Fence);
+  };
+
+  class SynchronousFence : public ResourceProvider::Fence {
+   public:
+    explicit SynchronousFence(gpu::gles2::GLES2Interface* gl);
+
+    // Overridden from Fence:
+    void Set() override;
+    bool HasPassed() override;
+    void Wait() override;
+
+    // Returns true if fence has been set but not yet synchornized.
+    bool has_synchronized() const { return has_synchronized_; }
+
+   private:
+    ~SynchronousFence() override;
+
+    void Synchronize();
+
+    gpu::gles2::GLES2Interface* gl_;
+    bool has_synchronized_;
+
+    DISALLOW_COPY_AND_ASSIGN(SynchronousFence);
+  };
+
+  // Acquire pixel buffer for resource. The pixel buffer can be used to
+  // set resource pixels without performing unnecessary copying.
+  void AcquirePixelBuffer(ResourceId resource);
+  void ReleasePixelBuffer(ResourceId resource);
+  // Map/unmap the acquired pixel buffer.
+  uint8_t* MapPixelBuffer(ResourceId id, int* stride);
+  void UnmapPixelBuffer(ResourceId id);
+  // Asynchronously update pixels from acquired pixel buffer.
+  void BeginSetPixels(ResourceId id);
+  void ForceSetPixelsToComplete(ResourceId id);
+  bool DidSetPixelsComplete(ResourceId id);
+
+  // For tests only! This prevents detecting uninitialized reads.
+  // Use SetPixels or LockForWrite to allocate implicitly.
+  void AllocateForTesting(ResourceId id);
+
+  // For tests only!
+  void CreateForTesting(ResourceId id);
+
+  GLenum TargetForTesting(ResourceId id);
+
+  // Sets the current read fence. If a resource is locked for read
+  // and has read fences enabled, the resource will not allow writes
+  // until this fence has passed.
+  void SetReadLockFence(Fence* fence) { current_read_lock_fence_ = fence; }
+
+  // Indicates if we can currently lock this resource for write.
+  bool CanLockForWrite(ResourceId id);
+
+  // Copy pixels from source to destination.
+  void CopyResource(ResourceId source_id, ResourceId dest_id);
+
+  void WaitSyncPointIfNeeded(ResourceId id);
+
+  void WaitReadLockIfNeeded(ResourceId id);
+
+  static GLint GetActiveTextureUnit(gpu::gles2::GLES2Interface* gl);
+
+  OutputSurface* output_surface() { return output_surface_; }
+
+ private:
+  struct Resource {
+    enum Origin { INTERNAL, EXTERNAL, DELEGATED };
+
+    Resource();
+    ~Resource();
+    Resource(unsigned texture_id,
+             const gfx::Size& size,
+             Origin origin,
+             GLenum target,
+             GLenum filter,
+             GLenum texture_pool,
+             GLint wrap_mode,
+             TextureHint hint,
+             ResourceFormat format);
+    Resource(uint8_t* pixels,
+             SharedBitmap* bitmap,
+             const gfx::Size& size,
+             Origin origin,
+             GLenum filter,
+             GLint wrap_mode);
+    Resource(const SharedBitmapId& bitmap_id,
+             const gfx::Size& size,
+             Origin origin,
+             GLenum filter,
+             GLint wrap_mode);
+
+    int child_id;
+    unsigned gl_id;
+    // Pixel buffer used for set pixels without unnecessary copying.
+    unsigned gl_pixel_buffer_id;
+    // Query used to determine when asynchronous set pixels complete.
+    unsigned gl_upload_query_id;
+    // Query used to determine when read lock fence has passed.
+    unsigned gl_read_lock_query_id;
+    TextureMailbox mailbox;
+    ReleaseCallbackImpl release_callback_impl;
+    uint8_t* pixels;
+    int lock_for_read_count;
+    int imported_count;
+    int exported_count;
+    bool dirty_image : 1;
+    bool locked_for_write : 1;
+    bool lost : 1;
+    bool marked_for_deletion : 1;
+    bool pending_set_pixels : 1;
+    bool set_pixels_completion_forced : 1;
+    bool allocated : 1;
+    bool read_lock_fences_enabled : 1;
+    bool has_shared_bitmap_id : 1;
+    bool allow_overlay : 1;
+    scoped_refptr<Fence> read_lock_fence;
+    gfx::Size size;
+    Origin origin;
+    GLenum target;
+    // TODO(skyostil): Use a separate sampler object for filter state.
+    GLenum original_filter;
+    GLenum filter;
+    unsigned image_id;
+    unsigned bound_image_id;
+    GLenum texture_pool;
+    GLint wrap_mode;
+    TextureHint hint;
+    ResourceType type;
+    ResourceFormat format;
+    SharedBitmapId shared_bitmap_id;
+    SharedBitmap* shared_bitmap;
+    gfx::GpuMemoryBuffer* gpu_memory_buffer;
+  };
+  typedef base::hash_map<ResourceId, Resource> ResourceMap;
+
+  static bool CompareResourceMapIteratorsByChildId(
+      const std::pair<ReturnedResource, ResourceMap::iterator>& a,
+      const std::pair<ReturnedResource, ResourceMap::iterator>& b);
+
+  struct Child {
+    Child();
+    ~Child();
+
+    ResourceIdMap child_to_parent_map;
+    ResourceIdMap parent_to_child_map;
+    ReturnCallback return_callback;
+    ResourceIdSet in_use_resources;
+    bool marked_for_deletion;
+  };
+  typedef base::hash_map<int, Child> ChildMap;
+
+  bool ReadLockFenceHasPassed(const Resource* resource) {
+    return !resource->read_lock_fence.get() ||
+           resource->read_lock_fence->HasPassed();
+  }
+
+  ResourceProvider(OutputSurface* output_surface,
+                   SharedBitmapManager* shared_bitmap_manager,
+                   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
+                   BlockingTaskRunner* blocking_main_thread_task_runner,
+                   int highp_threshold_min,
+                   bool use_rgba_4444_texture_format,
+                   size_t id_allocation_chunk_size);
+
+  void CleanUpGLIfNeeded();
+
+  Resource* GetResource(ResourceId id);
+  const Resource* LockForRead(ResourceId id);
+  void UnlockForRead(ResourceId id);
+  Resource* LockForWrite(ResourceId id);
+  void UnlockForWrite(Resource* resource);
+
+  static void PopulateSkBitmapWithResource(SkBitmap* sk_bitmap,
+                                           const Resource* resource);
+
+  void TransferResource(gpu::gles2::GLES2Interface* gl,
+                        ResourceId id,
+                        TransferableResource* resource);
+  enum DeleteStyle {
+    NORMAL,
+    FOR_SHUTDOWN,
+  };
+  void DeleteResourceInternal(ResourceMap::iterator it, DeleteStyle style);
+  void DeleteAndReturnUnusedResourcesToChild(ChildMap::iterator child_it,
+                                             DeleteStyle style,
+                                             const ResourceIdArray& unused);
+  void DestroyChildInternal(ChildMap::iterator it, DeleteStyle style);
+  void LazyCreate(Resource* resource);
+  void LazyAllocate(Resource* resource);
+
+  void BindImageForSampling(Resource* resource);
+  // Binds the given GL resource to a texture target for sampling using the
+  // specified filter for both minification and magnification. Returns the
+  // texture target used. The resource must be locked for reading.
+  GLenum BindForSampling(ResourceId resource_id, GLenum unit, GLenum filter);
+
+  // Returns NULL if the output_surface_ does not have a ContextProvider.
+  gpu::gles2::GLES2Interface* ContextGL() const;
+  class GrContext* GrContext(bool worker_context) const;
+
+  OutputSurface* output_surface_;
+  SharedBitmapManager* shared_bitmap_manager_;
+  gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+  BlockingTaskRunner* blocking_main_thread_task_runner_;
+  bool lost_output_surface_;
+  int highp_threshold_min_;
+  ResourceId next_id_;
+  ResourceMap resources_;
+  int next_child_;
+  ChildMap children_;
+
+  ResourceType default_resource_type_;
+  bool use_texture_storage_ext_;
+  bool use_texture_format_bgra_;
+  bool use_texture_usage_hint_;
+  bool use_compressed_texture_etc1_;
+  ResourceFormat yuv_resource_format_;
+  scoped_ptr<TextureUploader> texture_uploader_;
+  int max_texture_size_;
+  ResourceFormat best_texture_format_;
+
+  base::ThreadChecker thread_checker_;
+
+  scoped_refptr<Fence> current_read_lock_fence_;
+  bool use_rgba_4444_texture_format_;
+
+  const size_t id_allocation_chunk_size_;
+  scoped_ptr<IdAllocator> texture_id_allocator_;
+  scoped_ptr<IdAllocator> buffer_id_allocator_;
+
+  bool use_sync_query_;
+  // Fence used for CopyResource if CHROMIUM_sync_query is not supported.
+  scoped_refptr<SynchronousFence> synchronous_fence_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
+};
+
+// TODO(epenner): Move these format conversions to resource_format.h
+// once that builds on mac (npapi.h currently #includes OpenGL.h).
+inline unsigned BitsPerPixel(ResourceFormat format) {
+  switch (format) {
+    case BGRA_8888:
+    case RGBA_8888:
+      return 32;
+    case RGBA_4444:
+    case RGB_565:
+      return 16;
+    case ALPHA_8:
+    case LUMINANCE_8:
+    case RED_8:
+      return 8;
+    case ETC1:
+      return 4;
+  }
+  NOTREACHED();
+  return 0;
+}
+
+inline GLenum GLDataType(ResourceFormat format) {
+  DCHECK_LE(format, RESOURCE_FORMAT_MAX);
+  static const unsigned format_gl_data_type[RESOURCE_FORMAT_MAX + 1] = {
+      GL_UNSIGNED_BYTE,           // RGBA_8888
+      GL_UNSIGNED_SHORT_4_4_4_4,  // RGBA_4444
+      GL_UNSIGNED_BYTE,           // BGRA_8888
+      GL_UNSIGNED_BYTE,           // ALPHA_8
+      GL_UNSIGNED_BYTE,           // LUMINANCE_8
+      GL_UNSIGNED_SHORT_5_6_5,    // RGB_565,
+      GL_UNSIGNED_BYTE,           // ETC1
+      GL_UNSIGNED_BYTE            // RED_8
+  };
+  return format_gl_data_type[format];
+}
+
+inline GLenum GLDataFormat(ResourceFormat format) {
+  DCHECK_LE(format, RESOURCE_FORMAT_MAX);
+  static const unsigned format_gl_data_format[RESOURCE_FORMAT_MAX + 1] = {
+      GL_RGBA,           // RGBA_8888
+      GL_RGBA,           // RGBA_4444
+      GL_BGRA_EXT,       // BGRA_8888
+      GL_ALPHA,          // ALPHA_8
+      GL_LUMINANCE,      // LUMINANCE_8
+      GL_RGB,            // RGB_565
+      GL_ETC1_RGB8_OES,  // ETC1
+      GL_RED_EXT         // RED_8
+  };
+  return format_gl_data_format[format];
+}
+
+inline GLenum GLInternalFormat(ResourceFormat format) {
+  return GLDataFormat(format);
+}
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_