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// Copyright (c) 2012 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_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
#define CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
#include <stddef.h>
#include <stdint.h>
#include <queue>
#include "base/memory/ref_counted.h"
#include "cc/resources/resource_format.h"
#include "cc/resources/transferable_resource.h"
#include "content/renderer/gpu/compositor_output_surface.h"
#include "ui/gfx/geometry/size.h"
namespace cc {
class CompositorFrameAck;
}
namespace content {
class FrameSwapMessageQueue;
// Implementation of CompositorOutputSurface that renders to textures which
// are sent to the browser through the mailbox extension.
// This class can be created only on the main thread, but then becomes pinned
// to a fixed thread when bindToClient is called.
class MailboxOutputSurface : public CompositorOutputSurface {
public:
MailboxOutputSurface(
int32_t routing_id,
uint32_t output_surface_id,
const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
const scoped_refptr<ContextProviderCommandBuffer>&
worker_context_provider,
scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue,
cc::ResourceFormat format);
~MailboxOutputSurface() override;
// cc::OutputSurface implementation.
void DetachFromClient() override;
void EnsureBackbuffer() override;
void DiscardBackbuffer() override;
void Reshape(const gfx::Size& size, float scale_factor, bool alpha) override;
void BindFramebuffer() override;
void SwapBuffers(cc::CompositorFrame* frame) override;
private:
// CompositorOutputSurface overrides.
void OnSwapAck(uint32_t output_surface_id,
const cc::CompositorFrameAck& ack) override;
size_t GetNumAcksPending();
struct TransferableFrame {
TransferableFrame();
TransferableFrame(uint32_t texture_id,
const gpu::Mailbox& mailbox,
const gfx::Size size);
uint32_t texture_id;
gpu::Mailbox mailbox;
gpu::SyncToken sync_token;
gfx::Size size;
};
TransferableFrame current_backing_;
std::deque<TransferableFrame> pending_textures_;
std::queue<TransferableFrame> returned_textures_;
uint32_t fbo_;
bool is_backbuffer_discarded_;
cc::ResourceFormat format_;
};
} // namespace content
#endif // CONTENT_RENDERER_GPU_MAILBOX_OUTPUT_SURFACE_H_
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