// 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 "android_webview/browser/shared_renderer_state.h"
#include "base/memory/scoped_ptr.h"
#include "cc/layers/delegated_frame_resource_collection.h"
#include "cc/trees/layer_tree_host_client.h"
#include "cc/trees/layer_tree_host_single_thread_client.h"

struct AwDrawGLInfo;

namespace cc {
class DelegatedFrameProvider;
class DelegatedRendererLayer;
class Layer;
class LayerTreeHost;
}

namespace android_webview {

class AwGLSurface;
class ChildFrame;
class ParentOutputSurface;

class HardwareRenderer : public cc::LayerTreeHostClient,
                         public cc::LayerTreeHostSingleThreadClient,
                         public cc::DelegatedFrameResourceCollectionClient {
 public:
  explicit HardwareRenderer(SharedRendererState* state);
  ~HardwareRenderer() override;

  void DrawGL(bool stencil_enabled,
              int framebuffer_binding_ext,
              AwDrawGLInfo* draw_info);
  void CommitFrame();

  // cc::LayerTreeHostClient overrides.
  void WillBeginMainFrame() override {}
  void DidBeginMainFrame() override;
  void BeginMainFrame(const cc::BeginFrameArgs& args) override {}
  void BeginMainFrameNotExpectedSoon() override {}
  void Layout() override {}
  void ApplyViewportDeltas(const gfx::Vector2dF& inner_delta,
                           const gfx::Vector2dF& outer_delta,
                           const gfx::Vector2dF& elastic_overscroll_delta,
                           float page_scale,
                           float top_controls_delta) override {}
  void ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
                           float page_scale,
                           float top_controls_delta) override {}
  void RequestNewOutputSurface() override;
  void DidInitializeOutputSurface() override {}
  void DidFailToInitializeOutputSurface() override;
  void WillCommit() override {}
  void DidCommit() override {}
  void DidCommitAndDrawFrame() override {}
  void DidCompleteSwapBuffers() override {}
  void DidCompletePageScaleAnimation() override {}

  // cc::LayerTreeHostSingleThreadClient overrides.
  void DidPostSwapBuffers() override {}
  void DidAbortSwapBuffers() override {}

  // cc::DelegatedFrameResourceCollectionClient overrides.
  void UnusedResourcesAreAvailable() override;

 private:
  SharedRendererState* shared_renderer_state_;

  typedef void* EGLContext;
  EGLContext last_egl_context_;

  // Information about last delegated frame.
  gfx::Size frame_size_;

  // Infromation from UI on last commit.
  gfx::Vector2d scroll_offset_;

  // Information from draw.
  gfx::Size viewport_;
  gfx::Rect clip_;
  bool stencil_enabled_;
  bool viewport_clip_valid_for_dcheck_;

  scoped_ptr<ChildFrame> child_frame_;

  scoped_refptr<AwGLSurface> gl_surface_;

  scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
  scoped_refptr<cc::Layer> root_layer_;

  scoped_refptr<cc::DelegatedFrameResourceCollection> resource_collection_;
  scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
  scoped_refptr<cc::DelegatedRendererLayer> delegated_layer_;

  // This is owned indirectly by |layer_tree_host_|.
  ParentOutputSurface* output_surface_;

  DISALLOW_COPY_AND_ASSIGN(HardwareRenderer);
};

}  // namespace android_webview

#endif  // ANDROID_WEBVIEW_BROWSER_HARDWARE_RENDERER_H_