Calling OpenGL from the renderer process.

gpu/command_buffer/service/gles2_cmd_decoder.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.
 
 // This file contains the GLES2Decoder class.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_
 
 #include <build/build_config.h>
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 #include "base/callback.h"
 #if defined(OS_MACOSX)
 #include "app/surface/transport_dib.h"
 #endif
+
+#include "gfx/size.h"
 #include "gpu/command_buffer/service/common_decoder.h"
 
 
 namespace gpu {
 // Forward-declared instead of including x_utils.h, because including glx.h
 // causes havok.
 class XWindowWrapper;
 
 namespace gles2 {
 
@@ skipping 36 matching lines @@
   }
 #elif defined(OS_MACOSX)
   virtual uint64 SetWindowSizeForIOSurface(int32 width, int32 height) = 0;
   virtual TransportDIB::Handle SetWindowSizeForTransportDIB(int32 width,
                                                             int32 height) = 0;
   virtual void SetTransportDIBAllocAndFree(
       Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
       Callback1<TransportDIB::Id>::Type* deallocator) = 0;
 #endif
 
-  // Initializes the graphics context.
+  // Initializes the graphics context. Can create an offscreen
+  // decoder with a frame buffer that can be referenced from the parent.
   // Returns:
   //   true if successful.
-  virtual bool Initialize() = 0;
+  virtual bool Initialize(GLES2Decoder* parent,
+                          const gfx::Size& size,
+                          uint32 parent_texture_id) = 0;
 
   // Destroys the graphics context.
   virtual void Destroy() = 0;
 
+  // Resize an offscreen frame buffer.
+  virtual void ResizeOffscreenFrameBuffer(const gfx::Size& size) = 0;
+
   // Make this decoder's GL context current.
   virtual bool MakeCurrent() = 0;
 
   // Gets a service id by client id.
   virtual uint32 GetServiceIdForTesting(uint32 client_id) = 0;
 
   // Gets the GLES2 Util which holds info.
   virtual GLES2Util* GetGLES2Util() = 0;
 
   // Sets a callback which is called when a SwapBuffers command is processed.
@@ skipping 14 matching lines @@
   HWND hwnd_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(GLES2Decoder);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_H_