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// 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 ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
#define ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_
#include <memory>
#include "android_webview/browser/child_frame.h"
#include "android_webview/browser/compositor_id.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "components/viz/common/surfaces/frame_sink_id.h"
#include "components/viz/common/surfaces/surface_id.h"
#include "components/viz/service/frame_sinks/compositor_frame_sink_support_client.h"
struct AwDrawGLInfo;
namespace viz {
class CompositorFrameSinkSupport;
class LocalSurfaceIdAllocator;
}
namespace android_webview {
class ChildFrame;
class RenderThreadManager;
class SurfacesInstance;
class HardwareRenderer : public viz::CompositorFrameSinkSupportClient {
public:
// Two rules:
// 1) Never wait on |new_frame| on the UI thread, or in kModeSync. Otherwise
// this defeats the purpose of having a future.
// 2) Never replace a non-empty frames with an empty frame.
// The only way to do both is to hold up to two frames here. This is a helper
// method to do this. General pattern is call this method to prune existing
// queue, and then append the new frame. Wait on all frames in queue. Then
// remove all except the latest non-empty frame. If all frames are empty,
// then the deque is cleared. Return any non-empty frames that are pruned.
// Return value does not guarantee relative order is maintained.
static ChildFrameQueue WaitAndPruneFrameQueue(ChildFrameQueue* child_frames);
explicit HardwareRenderer(RenderThreadManager* state);
~HardwareRenderer() override;
void DrawGL(AwDrawGLInfo* draw_info);
void CommitFrame();
private:
// viz::CompositorFrameSinkSupportClient implementation.
void DidReceiveCompositorFrameAck(
const std::vector<viz::ReturnedResource>& resources) override;
void OnBeginFrame(const viz::BeginFrameArgs& args) override;
void ReclaimResources(
const std::vector<viz::ReturnedResource>& resources) override;
void WillDrawSurface(const viz::LocalSurfaceId& local_surface_id,
const gfx::Rect& damage_rect) override;
void OnBeginFramePausedChanged(bool paused) override;
void ReturnChildFrame(std::unique_ptr<ChildFrame> child_frame);
void ReturnResourcesToCompositor(
const std::vector<viz::ReturnedResource>& resources,
const CompositorID& compositor_id,
uint32_t layer_tree_frame_sink_id);
void AllocateSurface();
void DestroySurface();
void CreateNewCompositorFrameSinkSupport();
RenderThreadManager* render_thread_manager_;
typedef void* EGLContext;
EGLContext last_egl_context_;
// Information about last delegated frame.
gfx::Size surface_size_;
float device_scale_factor_ = 0;
// Infromation from UI on last commit.
gfx::Vector2d scroll_offset_;
ChildFrameQueue child_frame_queue_;
// This holds the last ChildFrame received. Contains the frame info of the
// last frame. The |frame| member is always null since frame has already
// been submitted.
std::unique_ptr<ChildFrame> child_frame_;
const scoped_refptr<SurfacesInstance> surfaces_;
viz::FrameSinkId frame_sink_id_;
const std::unique_ptr<viz::LocalSurfaceIdAllocator>
local_surface_id_allocator_;
std::unique_ptr<viz::CompositorFrameSinkSupport> support_;
viz::LocalSurfaceId child_id_;
CompositorID compositor_id_;
// HardwareRenderer guarantees resources are returned in the order of
// layer_tree_frame_sink_id, and resources for old output surfaces are
// dropped.
uint32_t last_committed_layer_tree_frame_sink_id_;
uint32_t last_submitted_layer_tree_frame_sink_id_;
DISALLOW_COPY_AND_ASSIGN(HardwareRenderer);
};
} // namespace android_webview
#endif // ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_