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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
      6 #define CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
      7 
      8 #include <string>
      9 
     10 #include "base/basictypes.h"
     11 #include "base/memory/scoped_ptr.h"
     12 #include "content/common/gpu/gpu_command_buffer_stub.h"
     13 #include "content/common/gpu/image_transport_surface.h"
     14 #include "gpu/command_buffer/common/mailbox.h"
     15 #include "gpu/command_buffer/service/texture_manager.h"
     16 #include "ui/gl/gl_context.h"
     17 #include "ui/gl/gl_surface.h"
     18 
     19 namespace content {
     20 class GpuChannelManager;
     21 
     22 class TextureImageTransportSurface
     23     : public ImageTransportSurface,
     24       public GpuCommandBufferStub::DestructionObserver,
     25       public gfx::GLSurface {
     26  public:
     27   TextureImageTransportSurface(GpuChannelManager* manager,
     28                                GpuCommandBufferStub* stub,
     29                                const gfx::GLSurfaceHandle& handle);
     30 
     31   // gfx::GLSurface implementation.
     32   virtual bool Initialize() OVERRIDE;
     33   virtual void Destroy() OVERRIDE;
     34   virtual bool DeferDraws() OVERRIDE;
     35   virtual bool IsOffscreen() OVERRIDE;
     36   virtual bool SwapBuffers() OVERRIDE;
     37   virtual gfx::Size GetSize() OVERRIDE;
     38   virtual void* GetHandle() OVERRIDE;
     39   virtual unsigned GetFormat() OVERRIDE;
     40   virtual bool SupportsPostSubBuffer() OVERRIDE;
     41   virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
     42   virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
     43   virtual bool SetBackbufferAllocation(bool allocated) OVERRIDE;
     44   virtual void SetFrontbufferAllocation(bool allocated) OVERRIDE;
     45   virtual void* GetShareHandle() OVERRIDE;
     46   virtual void* GetDisplay() OVERRIDE;
     47   virtual void* GetConfig() OVERRIDE;
     48 
     49  protected:
     50   // ImageTransportSurface implementation.
     51   virtual void OnBufferPresented(
     52       const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
     53   virtual void OnResize(gfx::Size size, float scale_factor) OVERRIDE;
     54   virtual void SetLatencyInfo(
     55       const std::vector<ui::LatencyInfo>& latency_info) OVERRIDE;
     56   virtual void WakeUpGpu() OVERRIDE;
     57 
     58   // GpuCommandBufferStub::DestructionObserver implementation.
     59   virtual void OnWillDestroyStub() OVERRIDE;
     60 
     61  private:
     62 
     63   gfx::Size backbuffer_size() const {
     64     DCHECK(backbuffer_.get());
     65     GLsizei width = 0;
     66     GLsizei height = 0;
     67     backbuffer_->texture()->GetLevelSize(GL_TEXTURE_2D, 0, &width, &height);
     68     return gfx::Size(width, height);
     69   }
     70 
     71   virtual ~TextureImageTransportSurface();
     72   void CreateBackTexture();
     73   void AttachBackTextureToFBO();
     74   void ReleaseBackTexture();
     75   void ReleaseFrontTexture();
     76   void BufferPresentedImpl(const gpu::Mailbox& mailbox_name);
     77 
     78   // The framebuffer that represents this surface (service id). Allocated lazily
     79   // in OnMakeCurrent.
     80   uint32 fbo_id_;
     81 
     82   // The current backbuffer.
     83   scoped_refptr<gpu::gles2::TextureRef> backbuffer_;
     84   scoped_refptr<gpu::gles2::TextureRef> frontbuffer_;
     85 
     86   // The mailbox name for the current backbuffer texture. Needs to be unique per
     87   // GL texture and is invalid while service_id is zero.
     88   gpu::Mailbox back_mailbox_;
     89   gpu::Mailbox front_mailbox_;
     90 
     91   // The current size of the GLSurface. Used to disambiguate from the current
     92   // texture size which might be outdated (since we use two buffers).
     93   gfx::Size current_size_;
     94   float scale_factor_;
     95 
     96   // Whether or not the command buffer stub has been destroyed.
     97   bool stub_destroyed_;
     98 
     99   bool backbuffer_suggested_allocation_;
    100   bool frontbuffer_suggested_allocation_;
    101 
    102   scoped_ptr<ImageTransportHelper> helper_;
    103   gfx::GLSurfaceHandle handle_;
    104 
    105   // The offscreen surface used to make the context current. However note that
    106   // the actual rendering is always redirected to an FBO.
    107   scoped_refptr<gfx::GLSurface> surface_;
    108 
    109   // Whether a SwapBuffers is pending.
    110   bool is_swap_buffers_pending_;
    111 
    112   // Whether we unscheduled command buffer because of pending SwapBuffers.
    113   bool did_unschedule_;
    114 
    115   // Holds a reference to the mailbox manager for cleanup.
    116   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
    117 
    118   std::vector<ui::LatencyInfo> latency_info_;
    119   DISALLOW_COPY_AND_ASSIGN(TextureImageTransportSurface);
    120 };
    121 
    122 }  // namespace content
    123 
    124 #endif  // CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_
    125