Revert of Introduce components/display_compositor

content/browser/compositor/buffer_queue.h

+// 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 CONTENT_BROWSER_COMPOSITOR_BUFFER_QUEUE_H_
+#define CONTENT_BROWSER_COMPOSITOR_BUFFER_QUEUE_H_
+
+#include <stddef.h>
+
+#include <deque>
+#include <memory>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace cc {
+class ContextProvider;
+}
+
+namespace gfx {
+class GpuMemoryBuffer;
+}
+
+namespace gpu {
+class GpuMemoryBufferManager;
+}
+
+namespace content {
+
+class GLHelper;
+
+// Provides a surface that manages its own buffers, backed by GpuMemoryBuffers
+// created using CHROMIUM_gpu_memory_buffer_image. Double/triple buffering is
+// implemented internally. Doublebuffering occurs if PageFlipComplete is called
+// before the next BindFramebuffer call, otherwise it creates extra buffers.
+class CONTENT_EXPORT BufferQueue {
+ public:
+  BufferQueue(scoped_refptr<cc::ContextProvider> context_provider,
+              unsigned int texture_target,
+              unsigned int internalformat,
+              GLHelper* gl_helper,
+              gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
+              int surface_id);
+  virtual ~BufferQueue();
+
+  void Initialize();
+
+  void BindFramebuffer();
+  void SwapBuffers(const gfx::Rect& damage);
+  void PageFlipComplete();
+  void Reshape(const gfx::Size& size, float scale_factor);
+
+  void RecreateBuffers();
+
+  unsigned int current_texture_id() const {
+    return current_surface_ ? current_surface_->texture : 0;
+  }
+  unsigned int fbo() const { return fbo_; }
+
+ private:
+  friend class BufferQueueTest;
+  friend class AllocatedSurface;
+
+  struct CONTENT_EXPORT AllocatedSurface {
+    AllocatedSurface(BufferQueue* buffer_queue,
+                     std::unique_ptr<gfx::GpuMemoryBuffer> buffer,
+                     unsigned int texture,
+                     unsigned int image,
+                     const gfx::Rect& rect);
+    ~AllocatedSurface();
+    BufferQueue* const buffer_queue;
+    std::unique_ptr<gfx::GpuMemoryBuffer> buffer;
+    const unsigned int texture;
+    const unsigned int image;
+    gfx::Rect damage;  // This is the damage for this frame from the previous.
+  };
+
+  void FreeAllSurfaces();
+
+  void FreeSurfaceResources(AllocatedSurface* surface);
+
+  // Copy everything that is in |copy_rect|, except for what is in
+  // |exclude_rect| from |source_texture| to |texture|.
+  virtual void CopyBufferDamage(int texture,
+                                int source_texture,
+                                const gfx::Rect& new_damage,
+                                const gfx::Rect& old_damage);
+
+  void UpdateBufferDamage(const gfx::Rect& damage);
+
+  // Return a surface, available to be drawn into.
+  std::unique_ptr<AllocatedSurface> GetNextSurface();
+
+  std::unique_ptr<AllocatedSurface> RecreateBuffer(
+      std::unique_ptr<AllocatedSurface> surface);
+
+  gfx::Size size_;
+  scoped_refptr<cc::ContextProvider> context_provider_;
+  unsigned int fbo_;
+  size_t allocated_count_;
+  unsigned int texture_target_;
+  unsigned int internal_format_;
+  // This surface is currently bound. This may be nullptr if no surface has
+  // been bound, or if allocation failed at bind.
+  std::unique_ptr<AllocatedSurface> current_surface_;
+  // The surface currently on the screen, if any.
+  std::unique_ptr<AllocatedSurface> displayed_surface_;
+  // These are free for use, and are not nullptr.
+  std::vector<std::unique_ptr<AllocatedSurface>> available_surfaces_;
+  // These have been swapped but are not displayed yet. Entries of this deque
+  // may be nullptr, if they represent frames that have been destroyed.
+  std::deque<std::unique_ptr<AllocatedSurface>> in_flight_surfaces_;
+  GLHelper* gl_helper_;
+  gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+  int surface_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(BufferQueue);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_COMPOSITOR_BUFFER_QUEUE_H_