gpu: Refactor GpuMemoryBuffer framework for multi-process support.

gpu/command_buffer/service/in_process_command_buffer.h

 // Copyright 2013 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 GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/synchronization/waitable_event.h"
 #include "gpu/command_buffer/common/command_buffer.h"
+#include "gpu/command_buffer/common/gpu_control.h"
 #include "gpu/gpu_export.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_preference.h"
 
 namespace base {
 class SequenceChecker;
 }
 
 namespace gfx {
 class GLContext;
-class GLImage;
 class GLSurface;
 class Size;
 }
 
 namespace gpu {
 
 namespace gles2 {
 class GLES2Decoder;
 }
 
+class GpuMemoryBufferFactory;
 class GpuScheduler;
 class TransferBufferManagerInterface;
 
 // This class provides a thread-safe interface to the global GPU service (for
 // example GPU thread) when being run in single process mode.
 // However, the behavior for accessing one context (i.e. one instance of this
 // class) from different client threads is undefined.
-class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer {
+class GPU_EXPORT InProcessCommandBuffer : public CommandBuffer,
+                                          public GpuControl {
  public:
   InProcessCommandBuffer();
   virtual ~InProcessCommandBuffer();
 
   // Used to override the GPU thread with explicit scheduling.
   // (By default an internal GPU thread will be spawned to handle all GL work
   // and the two functions are unused.)
   // The callback will be called from different client threads. After the
   // callback is issued, the client is expected to eventually call
   // ProcessGpuWorkOnCurrentThread(). The latter cannot be called from different
   // threads.
   // The callback needs to be set before any context is created.
   static void SetScheduleCallback(const base::Closure& callback);
   static void ProcessGpuWorkOnCurrentThread();
 
   static void EnableVirtualizedContext();
+  static void SetGpuMemoryBufferFactory(GpuMemoryBufferFactory* factory);
 
   // If |surface| is not NULL, use it directly; in this case, the command
   // buffer gpu thread must be the same as the client thread. Otherwise create
   // a new GLSurface.
   bool Initialize(scoped_refptr<gfx::GLSurface> surface,
                   bool is_offscreen,
                   bool share_resources,
                   gfx::AcceleratedWidget window,
                   const gfx::Size& size,
                   const char* allowed_extensions,
                   const std::vector<int32>& attribs,
                   gfx::GpuPreference gpu_preference,
                   const base::Closure& context_lost_callback,
                   unsigned int share_group_id);
   void Destroy();
   void SignalSyncPoint(unsigned sync_point,
                        const base::Closure& callback);
-  unsigned int CreateImageForGpuMemoryBuffer(
-      gfx::GpuMemoryBufferHandle buffer,
-      gfx::Size size);
-  void RemoveImage(unsigned int image_id);
 
   // CommandBuffer implementation:
   virtual bool Initialize() OVERRIDE;
   virtual State GetState() OVERRIDE;
   virtual State GetLastState() OVERRIDE;
   virtual int32 GetLastToken() OVERRIDE;
   virtual void Flush(int32 put_offset) OVERRIDE;
   virtual State FlushSync(int32 put_offset, int32 last_known_get) OVERRIDE;
   virtual void SetGetBuffer(int32 shm_id) OVERRIDE;
   virtual void SetGetOffset(int32 get_offset) OVERRIDE;
   virtual gpu::Buffer CreateTransferBuffer(size_t size, int32* id) OVERRIDE;
   virtual void DestroyTransferBuffer(int32 id) OVERRIDE;
   virtual gpu::Buffer GetTransferBuffer(int32 id) OVERRIDE;
   virtual void SetToken(int32 token) OVERRIDE;
   virtual void SetParseError(gpu::error::Error error) OVERRIDE;
   virtual void SetContextLostReason(
       gpu::error::ContextLostReason reason) OVERRIDE;
   virtual uint32 InsertSyncPoint() OVERRIDE;
   virtual gpu::error::Error GetLastError() OVERRIDE;
 
+  // GpuControl implementation:
+  virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(
+      size_t width,
+      size_t height,
+      unsigned internalformat,
+      int32* id) OVERRIDE;
+  virtual void DestroyGpuMemoryBuffer(int32 id) OVERRIDE;
+
   // The serializer interface to the GPU service (i.e. thread).
   class SchedulerClient {
    public:
      virtual ~SchedulerClient() {}
      virtual void QueueTask(const base::Closure& task) = 0;
   };
 
  private:
   bool InitializeOnGpuThread(bool is_offscreen,
                              gfx::AcceleratedWidget window,
                              const gfx::Size& size,
                              const char* allowed_extensions,
                              const std::vector<int32>& attribs,
                              gfx::GpuPreference gpu_preference);
   bool DestroyOnGpuThread();
   void FlushOnGpuThread(int32 put_offset);
-  void CreateImageOnGpuThread(gfx::GpuMemoryBufferHandle buffer,
-                              gfx::Size size,
-                              unsigned int image_id);
-  void RemoveImageOnGpuThread(unsigned int image_id);
   bool MakeCurrent();
   bool IsContextLost();
   base::Closure WrapCallback(const base::Closure& callback);
   State GetStateFast();
   void QueueTask(const base::Closure& task) { queue_->QueueTask(task); }
   void CheckSequencedThread();
 
   // Callbacks:
   void OnContextLost();
   void OnResizeView(gfx::Size size, float scale_factor);
@@ skipping 16 matching lines @@
   State last_state_;
   int32 last_put_offset_;
 
   // Accessed on both threads:
   scoped_ptr<CommandBuffer> command_buffer_;
   base::Lock command_buffer_lock_;
   base::WaitableEvent flush_event_;
   scoped_ptr<SchedulerClient> queue_;
   State state_after_last_flush_;
   base::Lock state_after_last_flush_lock_;
+  scoped_ptr<GpuControl> gpu_control_;
 
   // Only used with explicit scheduling and the gpu thread is the same as
   // the client thread.
   scoped_ptr<base::SequenceChecker> sequence_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(InProcessCommandBuffer);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_