Create new GLSurface for cross process image transport.

gpu/command_buffer/service/gpu_scheduler.h

 // Copyright (c) 2011 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_SCHEDULER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GPU_SCHEDULER_H_
 
 #include <map>
 #include <queue>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/task.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/gles2_cmd_decoder.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/surface/transport_dib.h"
 
 #if defined(OS_MACOSX)
 #include "ui/gfx/surface/accelerated_surface_mac.h"
-#elif defined(TOUCH_UI)
-#include "ui/gfx/surface/accelerated_surface_linux.h"
 #endif
 
 namespace gfx {
 class GLContext;
 class GLShareGroup;
 class GLSurface;
 }
 
 namespace gpu {
 namespace gles2 {
 class ContextGroup;
 }
 
 // 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 GpuScheduler : public CommandBufferEngine {
  public:
   // If a group is not passed in one will be created.
   static GpuScheduler* Create(CommandBuffer* command_buffer,
                               SurfaceManager* surface_manager,
                               gles2::ContextGroup* group);
 
   // This constructor is for unit tests.
   static GpuScheduler* CreateForTests(CommandBuffer* command_buffer,
                                       gles2::GLES2Decoder* decoder,
                                       CommandParser* parser);
 
   virtual ~GpuScheduler();
 
-  // Perform platform specific and common initialization.
+  // Platform specific code to create GLContexts and GLSurfaces that are
+  // handed off to the next function.
   bool Initialize(gfx::PluginWindowHandle hwnd,
                   const gfx::Size& size,
                   bool software,
                   const gles2::DisallowedExtensions& disallowed_extensions,
                   const char* allowed_extensions,
                   const std::vector<int32>& attribs,
                   gfx::GLShareGroup* share_group);
 
+  // Takes ownership of GLSurface and GLContext.
+  bool InitializeCommon(
+      const scoped_refptr<gfx::GLSurface>& surface,
+      const scoped_refptr<gfx::GLContext>& context,
+      const gfx::Size& size,
+      const gles2::DisallowedExtensions& disallowed_extensions,
+      const char* allowed_extensions,
+      const std::vector<int32>& attribs);
+
   void Destroy();
   void DestroyCommon();
 
   bool SetParent(GpuScheduler* parent_scheduler, uint32 parent_texture_id);
 
   void PutChanged();
 
   // Sets whether commands should be processed by this scheduler. Setting to
   // false unschedules. Setting to true reschedules. Whether or not the
   // scheduler is currently scheduled is "reference counted". Every call with
   // false must eventually be paired by a call with true.
   void SetScheduled(bool is_scheduled);
 
   // Returns whether the scheduler is currently scheduled to process commands.
   bool IsScheduled();
 
   // Sets a callback that is invoked just before scheduler is rescheduled.
   // Takes ownership of callback object.
   void SetScheduledCallback(Callback0::Type* scheduled_callback);
 
   // 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) || defined(TOUCH_UI)
+#if defined(OS_MACOSX)
   // To prevent the GPU process from overloading the browser process,
   // we need to track the number of swap buffers calls issued and
   // acknowledged per on-screen context, and keep the GPU from getting
   // too far ahead of the browser. Note that this
   // is also predicated on a flow control mechanism between the
   // renderer and GPU processes.
   uint64 swap_buffers_count() const;
   uint64 acknowledged_swap_buffers_count() const;
   void set_acknowledged_swap_buffers_count(
       uint64 acknowledged_swap_buffers_count);
-#endif
 
-#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(const gfx::Size& size);
   virtual TransportDIB::Handle SetWindowSizeForTransportDIB(
       const gfx::Size& size);
   virtual void SetTransportDIBAllocAndFree(
       Callback2<size_t, TransportDIB::Handle*>::Type* allocator,
       Callback1<TransportDIB::Id>::Type* deallocator);
   // Returns the id of the current surface that is being rendered to
   // (or 0 if no such surface has been created).
   virtual uint64 GetSurfaceId();
 
   void DidDestroySurface();
 #endif
 
-#if defined(TOUCH_UI)
-  virtual void CreateBackSurface(const gfx::Size& size);
-  // Should not be back_surface_ or front_surface_.
-  virtual void ReleaseSurface(uint64 surface_id);
-
-  // Returns the id of the surface (or 0 if no such surface has been created).
-  virtual uint64 GetBackSurfaceId();
-  virtual uint64 GetFrontSurfaceId();
-#endif
-
   // Sets a callback that is called when a glResizeCHROMIUM command
   // is processed.
   void SetResizeCallback(Callback1<gfx::Size>::Type* callback);
 
   // 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.
   void SetSwapBuffersCallback(Callback0::Type* callback);
 
   void SetCommandProcessedCallback(Callback0::Type* callback);
 
   // Sets a callback which is called when set_token() is called, and passes the
   // just-set token to the callback.  DCHECKs that no callback has previously
   // been registered for this notification.
   void SetTokenCallback(const base::Callback<void(int32)>& callback);
 
   // Get the GLES2Decoder associated with this scheduler.
   gles2::GLES2Decoder* decoder() const { return decoder_.get(); }
 
- protected:
-  // Perform common initialization. Takes ownership of GLSurface and GLContext.
-  bool InitializeCommon(
-      const scoped_refptr<gfx::GLSurface>& surface,
-      const scoped_refptr<gfx::GLContext>& context,
-      const gfx::Size& size,
-      const gles2::DisallowedExtensions& disallowed_extensions,
-      const char* allowed_extensions,
-      const std::vector<int32>& attribs);
-
-
  private:
   // If a group is not passed in one will be created.
   GpuScheduler(CommandBuffer* command_buffer,
                gles2::GLES2Decoder* decoder,
                CommandParser* parser);
 
   // Called via a callback just before we are supposed to call the
-  // user's resize callback.
-  void WillResize(gfx::Size size);
-
-  // Called via a callback just before we are supposed to call the
   // user's swap buffers callback.
   void WillSwapBuffers();
 
   // The GpuScheduler holds a weak reference to the CommandBuffer. The
   // CommandBuffer owns the GpuScheduler and holds a strong reference to it
   // through the ProcessCommands callback.
   CommandBuffer* command_buffer_;
 
   scoped_ptr<gles2::GLES2Decoder> decoder_;
   scoped_ptr<CommandParser> parser_;
 
   // Greater than zero if this is waiting to be rescheduled before continuing.
   int unscheduled_count_;
 
   scoped_ptr<Callback0::Type> scheduled_callback_;
 
-#if defined(OS_MACOSX) || defined(TOUCH_UI)
+#if defined(OS_MACOSX)
   uint64 swap_buffers_count_;
   uint64 acknowledged_swap_buffers_count_;
-#endif
-
-#if defined(OS_MACOSX)
   scoped_ptr<AcceleratedSurface> surface_;
-#elif defined(TOUCH_UI)
-  std::map<uint64, scoped_refptr<AcceleratedSurface> >
-      surfaces_;
-  scoped_refptr<AcceleratedSurface> back_surface_;
-  scoped_refptr<AcceleratedSurface> front_surface_;
 #endif
 
   ScopedRunnableMethodFactory<GpuScheduler> method_factory_;
-  scoped_ptr<Callback1<gfx::Size>::Type> wrapped_resize_callback_;
   scoped_ptr<Callback0::Type> wrapped_swap_buffers_callback_;
   scoped_ptr<Callback0::Type> command_processed_callback_;
   base::Callback<void(int32)> set_token_callback_;
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_SCHEDULER_H_