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.
5 #ifndef CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
6 #define CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
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"
17 class CompositorFrameAck;
21 class FrameSwapMessageQueue;
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 {
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 ~MailboxOutputSurface() override;
38 // cc::OutputSurface implementation.
39 void EnsureBackbuffer() override;
40 void DiscardBackbuffer() override;
41 void Reshape(const gfx::Size& size, float scale_factor) override;
42 void BindFramebuffer() override;
43 void SwapBuffers(cc::CompositorFrame* frame) override;
46 // CompositorOutputSurface overrides.
47 void OnSwapAck(uint32 output_surface_id,
48 const cc::CompositorFrameAck& ack) override;
50 size_t GetNumAcksPending();
52 struct TransferableFrame {
53 TransferableFrame() : texture_id(0), sync_point(0) {}
55 TransferableFrame(uint32 texture_id,
56 const gpu::Mailbox& mailbox,
58 : texture_id(texture_id), mailbox(mailbox), size(size), sync_point(0) {}
66 TransferableFrame current_backing_;
67 std::deque<TransferableFrame> pending_textures_;
68 std::queue<TransferableFrame> returned_textures_;
71 bool is_backbuffer_discarded_;
72 cc::ResourceFormat format_;
75 } // namespace content
77 #endif // CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_