gpu: Compositor management of GpuMemoryBuffer instances.

gpu/command_buffer/client/gpu_control.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 GPU_COMMAND_BUFFER_CLIENT_GPU_CONTROL_H_
 #define GPU_COMMAND_BUFFER_CLIENT_GPU_CONTROL_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "gpu/command_buffer/common/capabilities.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/gpu_export.h"
 
+extern "C" typedef struct _ClientBuffer* ClientBuffer;
+
 namespace gfx {
 class GpuMemoryBuffer;
 }
 
 namespace gpu {
 
 // Common interface for GpuControl implementations.
 class GPU_EXPORT GpuControl {
  public:
   GpuControl() {}
   virtual ~GpuControl() {}
 
   virtual Capabilities GetCapabilities() = 0;
 
-  // Create a gpu memory buffer of the given dimensions and format. Returns
-  // its ID or -1 on error.
-  virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(
-      size_t width,
-      size_t height,
-      unsigned internalformat,
-      unsigned usage,
-      int32_t* id) = 0;
+  // Create an image for a client buffer with the given dimensions and
+  // format. Returns its ID or -1 on error.
+  virtual int32_t CreateImage(ClientBuffer buffer,
+                              size_t width,
+                              size_t height,
+                              unsigned internalformat) = 0;
 
-  // Destroy a gpu memory buffer. The ID must be positive.
-  virtual void DestroyGpuMemoryBuffer(int32_t id) = 0;
+  // Destroy an image. The ID must be positive.
+  virtual void DestroyImage(int32_t id) = 0;
+
+  // Create a gpu memory buffer backed image with the given dimensions and
+  // format for |usage|. Returns its ID or -1 on error.
+  virtual int32_t CreateGpuMemoryBufferImage(size_t width,
+                                             size_t height,
+                                             unsigned internalformat,
+                                             unsigned usage) = 0;
 
   // Inserts a sync point, returning its ID. Sync point IDs are global and can
   // be used for cross-context synchronization.
   virtual uint32_t InsertSyncPoint() = 0;
 
   // Inserts a future sync point, returning its ID. Sync point IDs are global
   // and can be used for cross-context synchronization. The sync point won't be
   // retired immediately.
   virtual uint32_t InsertFutureSyncPoint() = 0;
 
@@ skipping 15 matching lines @@
   // returns a stream identifier.
   virtual uint32_t CreateStreamTexture(uint32_t texture_id) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuControl);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GPU_CONTROL_H_