Calling OpenGL from the renderer process.

gpu/command_buffer/service/gpu_processor.h

 // Copyright (c) 2009 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_GPU_PROCESSOR_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GPU_PROCESSOR_H_
 
 #include "base/callback.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/shared_memory.h"
+#include "base/task.h"
 #include "gfx/native_widget_types.h"
+#include "gfx/size.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/service/cmd_buffer_engine.h"
 #include "gpu/command_buffer/service/cmd_parser.h"
 #include "gpu/command_buffer/service/context_group.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 namespace gpu {
 
 // This class processes commands in a command buffer. It is event driven and
 // posts tasks to the current message loop to do additional work.
-class GPUProcessor : public base::RefCounted<GPUProcessor>,
-                     public CommandBufferEngine {
+class GPUProcessor : public CommandBufferEngine {
  public:
   explicit GPUProcessor(CommandBuffer* command_buffer);
 
   // This constructor is for unit tests.
   GPUProcessor(CommandBuffer* command_buffer,
                gles2::GLES2Decoder* decoder,
                CommandParser* parser,
                int commands_per_update);
 
-  virtual bool Initialize(gfx::PluginWindowHandle hwnd);
+  virtual bool Initialize(gfx::PluginWindowHandle hwnd,
+                          GPUProcessor* parent,
+                          const gfx::Size& size,
+                          uint32 parent_texture_id);
 
   virtual ~GPUProcessor();
 
   virtual void Destroy();
 
   virtual void ProcessCommands();
 
   // Implementation of CommandBufferEngine.
   virtual Buffer GetSharedMemoryBuffer(int32 shm_id);
   virtual void set_token(int32 token);
   virtual bool SetGetOffset(int32 offset);
   virtual int32 GetGetOffset();
 
+  // Asynchronously resizes an offscreen frame buffer.
+  void ResizeOffscreenFrameBuffer(const gfx::Size& size);
+
 #if defined(OS_MACOSX)
   // Needed only on Mac OS X, which does not render into an on-screen
   // window and therefore requires the backing store to be resized
   // manually. Returns an opaque identifier for the new backing store.
   // There are two versions of this method: one for use with the IOSurface
   // available in Mac OS X 10.6; and, one for use with the
   // TransportDIB-based version used on Mac OS X 10.5.
   virtual uint64 SetWindowSizeForIOSurface(int32 width, int32 height);
   virtual TransportDIB::Handle SetWindowSizeForTransportDIB(int32 width,
                                                             int32 height);
   virtual void SetTransportDIBAllocAndFree(
       Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
       Callback1<TransportDIB::Id>::Type* deallocator);
 #endif
 
   // Sets a callback which is called when a SwapBuffers command is processed.
   // Must be called after Initialize().
   // It is not defined on which thread this callback is called.
   virtual void SetSwapBuffersCallback(Callback0::Type* callback);
 
  private:
   // The GPUProcessor holds a weak reference to the CommandBuffer. The
   // CommandBuffer owns the GPUProcessor and holds a strong reference to it
   // through the ProcessCommands callback.
   CommandBuffer* command_buffer_;
 
-  scoped_ptr< ::base::SharedMemory> mapped_ring_buffer_;
   int commands_per_update_;
 
   gles2::ContextGroup group_;
   scoped_ptr<gles2::GLES2Decoder> decoder_;
   scoped_ptr<CommandParser> parser_;
+
+  ScopedRunnableMethodFactory<GPUProcessor> method_factory_;
 };
 
 }  // namespace gpu
 
-// Callbacks to the GPUProcessor hold a reference count.
-template <typename Method>
-class CallbackStorage<gpu::GPUProcessor, Method> {
- public:
-  CallbackStorage(gpu::GPUProcessor* obj, Method method)
-      : obj_(obj),
-        meth_(method) {
-    DCHECK(obj_);
-    obj_->AddRef();
-  }
-
-  ~CallbackStorage() {
-    obj_->Release();
-  }
-
- protected:
-  gpu::GPUProcessor* obj_;
-  Method meth_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CallbackStorage);
-};
-
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_PROCESSOR_H_