Move components/display_compositor to components/viz/display_compositor

components/display_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 COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_
-#define COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_
-
-#include <stddef.h>
-
-#include <deque>
-#include <memory>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "components/display_compositor/display_compositor_export.h"
-#include "gpu/ipc/common/surface_handle.h"
-#include "ui/gfx/buffer_types.h"
-#include "ui/gfx/color_space.h"
-#include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace gfx {
-class GpuMemoryBuffer;
-}
-
-namespace gpu {
-class GpuMemoryBufferManager;
-
-namespace gles2 {
-class GLES2Interface;
-}
-}
-
-namespace display_compositor {
-
-class GLHelper;
-
-// Provides a surface that manages its own buffers, backed by GpuMemoryBuffers
-// created using CHROMIUM_image. Double/triple buffering is implemented
-// internally. Doublebuffering occurs if PageFlipComplete is called before the
-// next BindFramebuffer call, otherwise it creates extra buffers.
-class DISPLAY_COMPOSITOR_EXPORT BufferQueue {
- public:
-  BufferQueue(gpu::gles2::GLES2Interface* gl,
-              uint32_t texture_target,
-              uint32_t internal_format,
-              gfx::BufferFormat format,
-              GLHelper* gl_helper,
-              gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
-              gpu::SurfaceHandle surface_handle);
-  virtual ~BufferQueue();
-
-  void Initialize();
-
-  void BindFramebuffer();
-  void SwapBuffers(const gfx::Rect& damage);
-  void PageFlipComplete();
-  void Reshape(const gfx::Size& size,
-               float scale_factor,
-               const gfx::ColorSpace& color_space,
-               bool use_stencil);
-  void RecreateBuffers();
-  uint32_t GetCurrentTextureId() const;
-
-  uint32_t fbo() const { return fbo_; }
-  uint32_t internal_format() const { return internal_format_; }
-
- private:
-  friend class BufferQueueTest;
-  friend class AllocatedSurface;
-
-  struct DISPLAY_COMPOSITOR_EXPORT AllocatedSurface {
-    AllocatedSurface(BufferQueue* buffer_queue,
-                     std::unique_ptr<gfx::GpuMemoryBuffer> buffer,
-                     uint32_t texture,
-                     uint32_t image,
-                     uint32_t stencil,
-                     const gfx::Rect& rect);
-    ~AllocatedSurface();
-    BufferQueue* const buffer_queue;
-    std::unique_ptr<gfx::GpuMemoryBuffer> buffer;
-    const uint32_t texture;
-    const uint32_t image;
-    const uint32_t stencil;
-    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);
-
-  gpu::gles2::GLES2Interface* const gl_;
-  gfx::Size size_;
-  gfx::ColorSpace color_space_;
-  bool use_stencil_ = false;
-  uint32_t fbo_;
-  size_t allocated_count_;
-  uint32_t texture_target_;
-  uint32_t internal_format_;
-  gfx::BufferFormat 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_;
-  gpu::SurfaceHandle surface_handle_;
-
-  DISALLOW_COPY_AND_ASSIGN(BufferQueue);
-};
-
-}  // namespace display_compositor
-
-#endif  // COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_