SurfacelessSurfaces for Mus

components/mus/surfaces/buffer_queue.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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_
+#ifndef COMPONENTS_MUS_SURFACES_BUFFER_QUEUE_H_
+#define COMPONENTS_MUS_SURFACES_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 "gpu/command_buffer/client/gles2_interface.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace cc {
 class ContextProvider;
 }
 
 namespace gfx {
 class GpuMemoryBuffer;
 }
 
-namespace gpu {
-class GpuMemoryBufferManager;
-}
+class SkRegion;
 
-namespace content {
+namespace mus {
 
+class MojoGpuMemoryBufferManager;
 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 {
+class 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);
+              uint32_t texture_target,
+              uint32_t internalformat,
+              gfx::AcceleratedWidget widget);
   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 {
+  struct 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);
 
+  void CopySubBufferDamage(GLenum target,
+                           GLuint texture,
+                           GLuint previous_texture,
+                           const SkRegion& new_damage,
+                           const SkRegion& old_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_;
+  gfx::AcceleratedWidget widget_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferQueue);
 };
 
-}  // namespace content
+}  // namespace mus
 
-#endif  // CONTENT_BROWSER_COMPOSITOR_BUFFER_QUEUE_H_
+#endif  // COMPONENTS_MUS_SURFACES_BUFFER_QUEUE_H_