Upstream version 5.34.104.0
[platform/framework/web/crosswalk.git] / src / content / renderer / gpu / mailbox_output_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_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
6 #define CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
7
8 #include <queue>
9
10 #include "cc/resources/resource_format.h"
11 #include "cc/resources/transferable_resource.h"
12 #include "content/renderer/gpu/compositor_output_surface.h"
13 #include "ui/gfx/size.h"
14
15 namespace cc {
16 class CompositorFrameAck;
17 }
18
19 namespace content {
20
21 // Implementation of CompositorOutputSurface that renders to textures which
22 // are sent to the browser through the mailbox extension.
23 // This class can be created only on the main thread, but then becomes pinned
24 // to a fixed thread when bindToClient is called.
25 class MailboxOutputSurface : public CompositorOutputSurface {
26  public:
27   MailboxOutputSurface(
28       int32 routing_id,
29       uint32 output_surface_id,
30       const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
31       scoped_ptr<cc::SoftwareOutputDevice> software_device,
32       cc::ResourceFormat format);
33   virtual ~MailboxOutputSurface();
34
35   // cc::OutputSurface implementation.
36   virtual void EnsureBackbuffer() OVERRIDE;
37   virtual void DiscardBackbuffer() OVERRIDE;
38   virtual void Reshape(const gfx::Size& size, float scale_factor) OVERRIDE;
39   virtual void BindFramebuffer() OVERRIDE;
40   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
41
42  private:
43   // CompositorOutputSurface overrides.
44   virtual void OnSwapAck(uint32 output_surface_id,
45                          const cc::CompositorFrameAck& ack) OVERRIDE;
46
47   size_t GetNumAcksPending();
48
49   struct TransferableFrame {
50     TransferableFrame() : texture_id(0), sync_point(0) {}
51
52     TransferableFrame(uint32 texture_id,
53                       const gpu::Mailbox& mailbox,
54                       const gfx::Size size)
55         : texture_id(texture_id), mailbox(mailbox), size(size), sync_point(0) {}
56
57     uint32 texture_id;
58     gpu::Mailbox mailbox;
59     gfx::Size size;
60     uint32 sync_point;
61   };
62
63   TransferableFrame current_backing_;
64   std::deque<TransferableFrame> pending_textures_;
65   std::queue<TransferableFrame> returned_textures_;
66
67   uint32 fbo_;
68   bool is_backbuffer_discarded_;
69   cc::ResourceFormat format_;
70 };
71
72 }  // namespace content
73
74 #endif  // CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_