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 "base/basictypes.h"
   9 #include "content/common/gpu/gpu_command_buffer_stub.h"
  10 #include "content/common/gpu/image_transport_surface.h"
  11 #include "gpu/command_buffer/service/mailbox_manager.h"
  12 #include "gpu/command_buffer/service/texture_manager.h"
  13 #include "ui/gl/gl_context.h"
  14 #include "ui/gl/gl_surface.h"
  15
  16 namespace content {
  17 class GpuChannelManager;
  18
  19 class TextureImageTransportSurface :
  20     public ImageTransportSurface,
  21     public GpuCommandBufferStub::DestructionObserver,
  22     public gfx::GLSurface {
  23  public:
  24   TextureImageTransportSurface(GpuChannelManager* manager,
  25                                GpuCommandBufferStub* stub,
  26                                const gfx::GLSurfaceHandle& handle);
  27
  28   // gfx::GLSurface implementation.
  29   virtual bool Initialize() OVERRIDE;
  30   virtual void Destroy() OVERRIDE;
  31   virtual bool DeferDraws() OVERRIDE;
  32   virtual bool Resize(const gfx::Size& size) OVERRIDE;
  33   virtual bool IsOffscreen() OVERRIDE;
  34   virtual bool SwapBuffers() OVERRIDE;
  35   virtual gfx::Size GetSize() OVERRIDE;
  36   virtual void* GetHandle() OVERRIDE;
  37   virtual unsigned GetFormat() OVERRIDE;
  38   virtual std::string GetExtensions() OVERRIDE;
  39   virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
  40   virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
  41   virtual bool OnMakeCurrent(gfx::GLContext* context) OVERRIDE;
  42   virtual void SetBackbufferAllocation(bool allocated) OVERRIDE;
  43   virtual void SetFrontbufferAllocation(bool allocated) OVERRIDE;
  44   virtual void* GetShareHandle() OVERRIDE;
  45   virtual void* GetDisplay() OVERRIDE;
  46   virtual void* GetConfig() OVERRIDE;
  47
  48  protected:
  49   // ImageTransportSurface implementation.
  50   virtual void OnBufferPresented(
  51       const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
  52   virtual void OnResizeViewACK() OVERRIDE;
  53   virtual void OnResize(gfx::Size size) OVERRIDE;
  54
  55   // GpuCommandBufferStub::DestructionObserver implementation.
  56   virtual void OnWillDestroyStub(GpuCommandBufferStub* stub) OVERRIDE;
  57
  58  private:
  59   // A texture backing the front/back buffer.
  60   struct Texture {
  61     Texture();
  62     ~Texture();
  63
  64     // The currently allocated size.
  65     gfx::Size size;
  66
  67     // The actual GL texture id.
  68     uint32 service_id;
  69
  70     // The surface handle for this texture (only 1 and 2 are valid).
  71     uint64 surface_handle;
  72   };
  73
  74   virtual ~TextureImageTransportSurface();
  75   void CreateBackTexture();
  76   void AttachBackTextureToFBO();
  77   void ReleaseBackTexture();
  78   void BufferPresentedImpl(uint64 surface_handle);
  79   void ProduceTexture(Texture& texture);
  80   void ConsumeTexture(Texture& texture);
  81
  82   gpu::gles2::MailboxName& mailbox_name(uint64 surface_handle) {
  83     DCHECK(surface_handle == 1 || surface_handle == 2);
  84     return mailbox_names_[surface_handle - 1];
  85   }
  86
  87   // The framebuffer that represents this surface (service id). Allocated lazily
  88   // in OnMakeCurrent.
  89   uint32 fbo_id_;
  90
  91   // The current backbuffer.
  92   Texture backbuffer_;
  93
  94   // The current size of the GLSurface. Used to disambiguate from the current
  95   // texture size which might be outdated (since we use two buffers).
  96   gfx::Size current_size_;
  97
  98   // Whether or not the command buffer stub has been destroyed.
  99   bool stub_destroyed_;
 100
 101   bool backbuffer_suggested_allocation_;
 102   bool frontbuffer_suggested_allocation_;
 103
 104   scoped_ptr<ImageTransportHelper> helper_;
 105   gfx::GLSurfaceHandle handle_;
 106
 107   // The offscreen surface used to make the context current. However note that
 108   // the actual rendering is always redirected to an FBO.
 109   scoped_refptr<gfx::GLSurface> surface_;
 110
 111   // Holds a reference to the underlying context for cleanup.
 112   scoped_refptr<gfx::GLContext> context_;
 113
 114   // Whether a SwapBuffers is pending.
 115   bool is_swap_buffers_pending_;
 116
 117   // Whether we unscheduled command buffer because of pending SwapBuffers.
 118   bool did_unschedule_;
 119
 120   // The mailbox names used for texture exchange. Uses surface_handle as key.
 121   gpu::gles2::MailboxName mailbox_names_[2];
 122
 123   // Holds a reference to the mailbox manager for cleanup.
 124   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 125
 126   DISALLOW_COPY_AND_ASSIGN(TextureImageTransportSurface);
 127 };
 128
 129 }  // namespace content
 130
 131 #endif  // CONTENT_COMMON_GPU_TEXTURE_IMAGE_TRANSPORT_SURFACE_H_