content/common/gpu/texture_image_transport_surface.h

   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_