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_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_ 6 #define CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_ 7 8 #include <queue> 9 10 #include "base/memory/ref_counted.h" 11 #include "cc/resources/resource_format.h" 12 #include "cc/resources/transferable_resource.h" 13 #include "content/renderer/gpu/compositor_output_surface.h" 14 #include "ui/gfx/size.h" 15 16 namespace cc { 17 class CompositorFrameAck; 18 } 19 20 namespace content { 21 class FrameSwapMessageQueue; 22 23 // Implementation of CompositorOutputSurface that renders to textures which 24 // are sent to the browser through the mailbox extension. 25 // This class can be created only on the main thread, but then becomes pinned 26 // to a fixed thread when bindToClient is called. 27 class MailboxOutputSurface : public CompositorOutputSurface { 28 public: 29 MailboxOutputSurface( 30 int32 routing_id, 31 uint32 output_surface_id, 32 const scoped_refptr<ContextProviderCommandBuffer>& context_provider, 33 scoped_ptr<cc::SoftwareOutputDevice> software_device, 34 scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue, 35 cc::ResourceFormat format); 36 virtual ~MailboxOutputSurface(); 37 38 // cc::OutputSurface implementation. 39 virtual void EnsureBackbuffer() OVERRIDE; 40 virtual void DiscardBackbuffer() OVERRIDE; 41 virtual void Reshape(const gfx::Size& size, float scale_factor) OVERRIDE; 42 virtual void BindFramebuffer() OVERRIDE; 43 virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE; 44 45 private: 46 // CompositorOutputSurface overrides. 47 virtual void OnSwapAck(uint32 output_surface_id, 48 const cc::CompositorFrameAck& ack) OVERRIDE; 49 50 size_t GetNumAcksPending(); 51 52 struct TransferableFrame { TransferableFrameTransferableFrame53 TransferableFrame() : texture_id(0), sync_point(0) {} 54 TransferableFrameTransferableFrame55 TransferableFrame(uint32 texture_id, 56 const gpu::Mailbox& mailbox, 57 const gfx::Size size) 58 : texture_id(texture_id), mailbox(mailbox), size(size), sync_point(0) {} 59 60 uint32 texture_id; 61 gpu::Mailbox mailbox; 62 gfx::Size size; 63 uint32 sync_point; 64 }; 65 66 TransferableFrame current_backing_; 67 std::deque<TransferableFrame> pending_textures_; 68 std::queue<TransferableFrame> returned_textures_; 69 70 uint32 fbo_; 71 bool is_backbuffer_discarded_; 72 cc::ResourceFormat format_; 73 }; 74 75 } // namespace content 76 77 #endif // CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_ 78