CARemoteLayer alive-ish

content/common/gpu/image_transport_surface_mac.h

+// Copyright 2014 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 CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_MAC_H_
+#define CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_MAC_H_
+
+#include "base/mac/scoped_cftyperef.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/common/gpu/gpu_command_buffer_stub.h"
+#include "content/common/gpu/image_transport_surface.h"
+#include "ui/gl/gl_bindings.h"
+
+struct GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params;
+struct GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params;
+
+namespace content {
+
+// We are backed by an offscreen surface for the purposes of creating
+// a context, but use FBOs to render to texture backed IOSurface
+class ImageTransportSurfaceFBO
+    : public gfx::GLSurface,
+      public ImageTransportSurface,
+      public GpuCommandBufferStub::DestructionObserver {
+ public:
+  class StorageProvider {
+   public:
+    virtual ~StorageProvider() {}
+    virtual gfx::Size GetRoundedSize(gfx::Size size) = 0;
+    virtual bool AllocateColorBufferStorage(
+        CGLContextObj context, gfx::Size size) = 0;
+    virtual void FreeColorBufferStorage() = 0;
+    virtual void PopulateSwapBuffersStorageParams(
+        GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params* params) = 0;
+    virtual void PopulateSubBufferStorageParams(
+        GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params* params) = 0;
+  };
+
+  ImageTransportSurfaceFBO(StorageProvider* storage_provider,
+                           GpuChannelManager* manager,
+                           GpuCommandBufferStub* stub,
+                           gfx::PluginWindowHandle handle);
+
+  // GLSurface implementation
+  virtual bool Initialize() OVERRIDE;
+  virtual void Destroy() OVERRIDE;
+  virtual bool DeferDraws() OVERRIDE;
+  virtual bool IsOffscreen() OVERRIDE;
+  virtual bool SwapBuffers() OVERRIDE;
+  virtual bool PostSubBuffer(int x, int y, int width, int height) OVERRIDE;
+  virtual bool SupportsPostSubBuffer() OVERRIDE;
+  virtual gfx::Size GetSize() OVERRIDE;
+  virtual void* GetHandle() OVERRIDE;
+  virtual bool OnMakeCurrent(gfx::GLContext* context) OVERRIDE;
+  virtual unsigned int GetBackingFrameBufferObject() OVERRIDE;
+  virtual bool SetBackbufferAllocation(bool allocated) OVERRIDE;
+  virtual void SetFrontbufferAllocation(bool allocated) OVERRIDE;
+
+ protected:
+  // ImageTransportSurface implementation
+  virtual void OnBufferPresented(
+      const AcceleratedSurfaceMsg_BufferPresented_Params& params) OVERRIDE;
+  virtual void OnResize(gfx::Size size, float scale_factor) OVERRIDE;
+  virtual void SetLatencyInfo(
+      const std::vector<ui::LatencyInfo>&) OVERRIDE;
+  virtual void WakeUpGpu() OVERRIDE;
+
+  // GpuCommandBufferStub::DestructionObserver implementation.
+  virtual void OnWillDestroyStub() OVERRIDE;
+
+ private:
+  virtual ~ImageTransportSurfaceFBO() OVERRIDE;
+
+  void AdjustBufferAllocation();
+  void DestroyFramebuffer();
+  void CreateFramebuffer();
+
+  scoped_ptr<StorageProvider> storage_provider_;
+
+  // Tracks the current buffer allocation state.
+  bool backbuffer_suggested_allocation_;
+  bool frontbuffer_suggested_allocation_;
+
+  uint32 fbo_id_;
+  GLuint texture_id_;
+  GLuint depth_stencil_renderbuffer_id_;
+  bool has_complete_framebuffer_;
+
+  // Weak pointer to the context that this was last made current to.
+  gfx::GLContext* context_;
+
+  gfx::Size size_;
+  gfx::Size rounded_size_;
+  float scale_factor_;
+
+  // Whether or not we've successfully made the surface current once.
+  bool made_current_;
+
+  // Whether a SwapBuffers is pending.
+  bool is_swap_buffers_pending_;
+
+  // Whether we unscheduled command buffer because of pending SwapBuffers.
+  bool did_unschedule_;
+
+  std::vector<ui::LatencyInfo> latency_info_;
+
+  scoped_ptr<ImageTransportHelper> helper_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageTransportSurfaceFBO);
+};
+
+}  // namespace content
+
+#endif  //  CONTENT_COMMON_GPU_IMAGE_TRANSPORT_SURFACE_MAC_H_