content/common/gpu/image_transport_surface_fbo_mac.h

   1 // Copyright 2014 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_IMAGE_TRANSPORT_SURFACE_FBO_MAC_H_
   6 #define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_FBO_MAC_H_
   7
   8 #include "base/mac/scoped_cftyperef.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "content/common/gpu/gpu_command_buffer_stub.h"
  11 #include "content/common/gpu/image_transport_surface.h"
  12 #include "ui/gl/gl_bindings.h"
  13
  14 namespace content {
  15
  16 // We are backed by an offscreen surface for the purposes of creating
  17 // a context, but use FBOs to render to texture. The texture may be backed by
  18 // an IOSurface, or it may be presented to the screen via a CALayer, depending
  19 // on the StorageProvider class specified.
  20 class ImageTransportSurfaceFBO
  21     : public gfx::GLSurface,
  22       public ImageTransportSurface,
  23       public GpuCommandBufferStub::DestructionObserver {
  24  public:
  25   // The interface through which storage for the color buffer of the FBO is
  26   // allocated.
  27   class StorageProvider {
  28    public:
  29     virtual ~StorageProvider() {}
  30     // IOSurfaces cause too much address space fragmentation if they are
  31     // allocated on every resize. This gets a rounded size for allocation.
  32     virtual gfx::Size GetRoundedSize(gfx::Size size) = 0;
  33
  34     // Allocate the storage for the color buffer. The specified context is
  35     // current, and there is a texture bound to GL_TEXTURE_RECTANGLE_ARB.
  36     virtual bool AllocateColorBufferStorage(
  37         CGLContextObj context, GLuint texture,
  38         gfx::Size size, float scale_factor) = 0;
  39
  40     // Free the storage allocated in the AllocateColorBufferStorage call. The
  41     // GL texture that was bound has already been deleted by the caller.
  42     virtual void FreeColorBufferStorage() = 0;
  43
  44     // Retrieve the handle for the surface to send to the browser process to
  45     // display.
  46     virtual uint64 GetSurfaceHandle() const = 0;
  47
  48     // Called when a frame is about to be sent to the browser process.
  49     virtual void WillSwapBuffers() = 0;
  50   };
  51
  52   ImageTransportSurfaceFBO(StorageProvider* storage_provider,
  53                            GpuChannelManager* manager,
  54                            GpuCommandBufferStub* stub,
  55                            gfx::PluginWindowHandle handle);
  56
  57   // GLSurface implementation
  58   virtual bool Initialize() OVERRIDE;
  59   virtual void Destroy() OVERRIDE;
  60   virtual bool DeferDraws() OVERRIDE;
  61   virtual bool IsOffscreen() OVERRIDE;
  62   virtual bool SwapBuffers() OVERRIDE;
  63   virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
  64   virtual bool SupportsPostSubBuffer() OVERRIDE;
  65   virtual gfx::Size GetSize() OVERRIDE;
  66   virtual void* GetHandle() OVERRIDE;
  67   virtual void* GetDisplay() OVERRIDE;
  68   virtual bool OnMakeCurrent(gfx::GLContext* context) OVERRIDE;
  69   virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
  70   virtual bool SetBackbufferAllocation(bool allocated) OVERRIDE;
  71   virtual void SetFrontbufferAllocation(bool allocated) OVERRIDE;
  72
  73  protected:
  74   // ImageTransportSurface implementation
  75   virtual void OnBufferPresented(
  76       const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
  77   virtual void OnResize(gfx::Size size, float scale_factor) OVERRIDE;
  78   virtual void SetLatencyInfo(
  79       const std::vector<ui::LatencyInfo>&) OVERRIDE;
  80   virtual void WakeUpGpu() OVERRIDE;
  81
  82   // GpuCommandBufferStub::DestructionObserver implementation.
  83   virtual void OnWillDestroyStub() OVERRIDE;
  84
  85  private:
  86   virtual ~ImageTransportSurfaceFBO() OVERRIDE;
  87
  88   void AdjustBufferAllocation();
  89   void DestroyFramebuffer();
  90   void CreateFramebuffer();
  91
  92   scoped_ptr<StorageProvider> storage_provider_;
  93
  94   // Tracks the current buffer allocation state.
  95   bool backbuffer_suggested_allocation_;
  96   bool frontbuffer_suggested_allocation_;
  97
  98   uint32 fbo_id_;
  99   GLuint texture_id_;
 100   GLuint depth_stencil_renderbuffer_id_;
 101   bool has_complete_framebuffer_;
 102
 103   // Weak pointer to the context that this was last made current to.
 104   gfx::GLContext* context_;
 105
 106   gfx::Size size_;
 107   gfx::Size rounded_size_;
 108   float scale_factor_;
 109
 110   // Whether or not we've successfully made the surface current once.
 111   bool made_current_;
 112
 113   // Whether a SwapBuffers is pending.
 114   bool is_swap_buffers_pending_;
 115
 116   // Whether we unscheduled command buffer because of pending SwapBuffers.
 117   bool did_unschedule_;
 118
 119   std::vector<ui::LatencyInfo> latency_info_;
 120
 121   scoped_ptr<ImageTransportHelper> helper_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(ImageTransportSurfaceFBO);
 124 };
 125
 126 }  // namespace content
 127
 128 #endif  //  CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_MAC_H_