// 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.

#include "content/browser/renderer_host/render_widget_host_view_android.h"

#include <android/bitmap.h>

#include "base/basictypes.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/worker_pool.h"
#include "cc/base/latency_info_swap_promise.h"
#include "cc/layers/delegated_frame_provider.h"
#include "cc/layers/delegated_renderer_layer.h"
#include "cc/layers/layer.h"
#include "cc/layers/texture_layer.h"
#include "cc/output/compositor_frame.h"
#include "cc/output/compositor_frame_ack.h"
#include "cc/output/copy_output_request.h"
#include "cc/output/copy_output_result.h"
#include "cc/resources/single_release_callback.h"
#include "cc/trees/layer_tree_host.h"
#include "content/browser/accessibility/browser_accessibility_manager_android.h"
#include "content/browser/android/content_view_core_impl.h"
#include "content/browser/android/in_process/synchronous_compositor_impl.h"
#include "content/browser/android/overscroll_glow.h"
#include "content/browser/devtools/render_view_devtools_agent_host.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/browser/gpu/gpu_process_host_ui_shim.h"
#include "content/browser/gpu/gpu_surface_tracker.h"
#include "content/browser/renderer_host/compositor_impl_android.h"
#include "content/browser/renderer_host/dip_util.h"
#include "content/browser/renderer_host/image_transport_factory_android.h"
#include "content/browser/renderer_host/input/synthetic_gesture_target_android.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/common/gpu/client/gl_helper.h"
#include "content/common/gpu/gpu_messages.h"
#include "content/common/input_messages.h"
#include "content/common/view_messages.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/common/content_switches.h"
#include "gpu/config/gpu_driver_bug_workaround_type.h"
#include "skia/ext/image_operations.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/khronos/GLES2/gl2ext.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "ui/base/android/window_android.h"
#include "ui/gfx/android/device_display_info.h"
#include "ui/gfx/android/java_bitmap.h"
#include "ui/gfx/display.h"
#include "ui/gfx/screen.h"
#include "ui/gfx/size_conversions.h"

namespace content {

namespace {

const int kUndefinedOutputSurfaceId = -1;

void InsertSyncPointAndAckForCompositor(
    int renderer_host_id,
    uint32 output_surface_id,
    int route_id,
    const gpu::Mailbox& return_mailbox,
    const gfx::Size return_size) {
  cc::CompositorFrameAck ack;
  ack.gl_frame_data.reset(new cc::GLFrameData());
  if (!return_mailbox.IsZero()) {
    ack.gl_frame_data->mailbox = return_mailbox;
    ack.gl_frame_data->size = return_size;
    ack.gl_frame_data->sync_point =
        ImageTransportFactoryAndroid::GetInstance()->InsertSyncPoint();
  }
  RenderWidgetHostImpl::SendSwapCompositorFrameAck(
      route_id, output_surface_id, renderer_host_id, ack);
}

// Sends an acknowledgement to the renderer of a processed IME event.
void SendImeEventAck(RenderWidgetHostImpl* host) {
  host->Send(new ViewMsg_ImeEventAck(host->GetRoutingID()));
}

void CopyFromCompositingSurfaceFinished(
    const base::Callback<void(bool, const SkBitmap&)>& callback,
    scoped_ptr<cc::SingleReleaseCallback> release_callback,
    scoped_ptr<SkBitmap> bitmap,
    scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock,
    bool result) {
  bitmap_pixels_lock.reset();
  release_callback->Run(0, false);
  callback.Run(result, *bitmap);
}

bool UsingDelegatedRenderer() {
  return CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableDelegatedRenderer);
}

}  // anonymous namespace

RenderWidgetHostViewAndroid::RenderWidgetHostViewAndroid(
    RenderWidgetHostImpl* widget_host,
    ContentViewCoreImpl* content_view_core)
    : host_(widget_host),
      needs_begin_frame_(false),
      are_layers_attached_(true),
      content_view_core_(NULL),
      ime_adapter_android_(this),
      cached_background_color_(SK_ColorWHITE),
      texture_id_in_layer_(0),
      last_output_surface_id_(kUndefinedOutputSurfaceId),
      weak_ptr_factory_(this),
      overscroll_effect_enabled_(
          !CommandLine::ForCurrentProcess()->
              HasSwitch(switches::kDisableOverscrollEdgeEffect)),
      overscroll_effect_(OverscrollGlow::Create(overscroll_effect_enabled_)),
      flush_input_requested_(false),
      accelerated_surface_route_id_(0),
      using_synchronous_compositor_(SynchronousCompositorImpl::FromID(
                                        widget_host->GetProcess()->GetID(),
                                        widget_host->GetRoutingID()) != NULL) {
  if (!UsingDelegatedRenderer()) {
    texture_layer_ = cc::TextureLayer::Create(NULL);
    layer_ = texture_layer_;
  }

  host_->SetView(this);
  SetContentViewCore(content_view_core);
  ImageTransportFactoryAndroid::AddObserver(this);
}

RenderWidgetHostViewAndroid::~RenderWidgetHostViewAndroid() {
  ImageTransportFactoryAndroid::RemoveObserver(this);
  SetContentViewCore(NULL);
  DCHECK(ack_callbacks_.empty());
  if (texture_id_in_layer_) {
    ImageTransportFactoryAndroid::GetInstance()->DeleteTexture(
        texture_id_in_layer_);
  }

  if (texture_layer_.get())
    texture_layer_->ClearClient();

  if (resource_collection_.get())
    resource_collection_->SetClient(NULL);
}


bool RenderWidgetHostViewAndroid::OnMessageReceived(
    const IPC::Message& message) {
  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostViewAndroid, message)
    IPC_MESSAGE_HANDLER(ViewHostMsg_StartContentIntent, OnStartContentIntent)
    IPC_MESSAGE_HANDLER(ViewHostMsg_DidChangeBodyBackgroundColor,
                        OnDidChangeBodyBackgroundColor)
    IPC_MESSAGE_HANDLER(ViewHostMsg_SetNeedsBeginFrame,
                        OnSetNeedsBeginFrame)
    IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
                        OnTextInputStateChanged)
    IPC_MESSAGE_HANDLER(ViewHostMsg_SmartClipDataExtracted,
                        OnSmartClipDataExtracted)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

void RenderWidgetHostViewAndroid::InitAsChild(gfx::NativeView parent_view) {
  NOTIMPLEMENTED();
}

void RenderWidgetHostViewAndroid::InitAsPopup(
    RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
  NOTIMPLEMENTED();
}

void RenderWidgetHostViewAndroid::InitAsFullscreen(
    RenderWidgetHostView* reference_host_view) {
  NOTIMPLEMENTED();
}

RenderWidgetHost*
RenderWidgetHostViewAndroid::GetRenderWidgetHost() const {
  return host_;
}

void RenderWidgetHostViewAndroid::WasShown() {
  if (!host_ || !host_->is_hidden())
    return;

  host_->WasShown();

  if (content_view_core_ && !using_synchronous_compositor_)
    content_view_core_->GetWindowAndroid()->AddObserver(this);
}

void RenderWidgetHostViewAndroid::WasHidden() {
  RunAckCallbacks();

  if (!host_ || host_->is_hidden())
    return;

  // Inform the renderer that we are being hidden so it can reduce its resource
  // utilization.
  host_->WasHidden();

  if (content_view_core_ && !using_synchronous_compositor_)
    content_view_core_->GetWindowAndroid()->RemoveObserver(this);
}

void RenderWidgetHostViewAndroid::WasResized() {
  host_->WasResized();
}

void RenderWidgetHostViewAndroid::SetSize(const gfx::Size& size) {
  // Ignore the given size as only the Java code has the power to
  // resize the view on Android.
  default_size_ = size;
  WasResized();
}

void RenderWidgetHostViewAndroid::SetBounds(const gfx::Rect& rect) {
  SetSize(rect.size());
}

blink::WebGLId RenderWidgetHostViewAndroid::GetScaledContentTexture(
    float scale,
    gfx::Size* out_size) {
  gfx::Size size(gfx::ToCeiledSize(
      gfx::ScaleSize(texture_size_in_layer_, scale)));

  if (!CompositorImpl::IsInitialized() ||
      texture_id_in_layer_ == 0 ||
      texture_size_in_layer_.IsEmpty() ||
      size.IsEmpty()) {
    if (out_size)
        out_size->SetSize(0, 0);

    return 0;
  }

  if (out_size)
    *out_size = size;

  GLHelper* helper = ImageTransportFactoryAndroid::GetInstance()->GetGLHelper();
  return helper->CopyAndScaleTexture(texture_id_in_layer_,
                                     texture_size_in_layer_,
                                     size,
                                     true,
                                     GLHelper::SCALER_QUALITY_FAST);
}

bool RenderWidgetHostViewAndroid::PopulateBitmapWithContents(jobject jbitmap) {
  if (!CompositorImpl::IsInitialized() ||
      texture_id_in_layer_ == 0 ||
      texture_size_in_layer_.IsEmpty())
    return false;

  gfx::JavaBitmap bitmap(jbitmap);

  // TODO(dtrainor): Eventually add support for multiple formats here.
  DCHECK(bitmap.format() == ANDROID_BITMAP_FORMAT_RGBA_8888);

  GLHelper* helper = ImageTransportFactoryAndroid::GetInstance()->GetGLHelper();

  blink::WebGLId texture = helper->CopyAndScaleTexture(
      texture_id_in_layer_,
      texture_size_in_layer_,
      bitmap.size(),
      true,
      GLHelper::SCALER_QUALITY_FAST);
  if (texture == 0)
    return false;

  helper->ReadbackTextureSync(texture,
                              gfx::Rect(bitmap.size()),
                              static_cast<unsigned char*> (bitmap.pixels()));

  blink::WebGraphicsContext3D* context =
      ImageTransportFactoryAndroid::GetInstance()->GetContext3D();
  context->deleteTexture(texture);

  return true;
}

bool RenderWidgetHostViewAndroid::HasValidFrame() const {
  if (!content_view_core_)
    return false;
  if (texture_size_in_layer_.IsEmpty())
    return false;

  if (UsingDelegatedRenderer()) {
    if (!delegated_renderer_layer_.get())
      return false;
  } else {
    if (texture_id_in_layer_ == 0)
      return false;
  }

  return true;
}

gfx::NativeView RenderWidgetHostViewAndroid::GetNativeView() const {
  return content_view_core_->GetViewAndroid();
}

gfx::NativeViewId RenderWidgetHostViewAndroid::GetNativeViewId() const {
  return reinterpret_cast<gfx::NativeViewId>(
      const_cast<RenderWidgetHostViewAndroid*>(this));
}

gfx::NativeViewAccessible
RenderWidgetHostViewAndroid::GetNativeViewAccessible() {
  NOTIMPLEMENTED();
  return NULL;
}

void RenderWidgetHostViewAndroid::MovePluginWindows(
    const gfx::Vector2d& scroll_offset,
    const std::vector<WebPluginGeometry>& moves) {
  // We don't have plugin windows on Android. Do nothing. Note: this is called
  // from RenderWidgetHost::OnUpdateRect which is itself invoked while
  // processing the corresponding message from Renderer.
}

void RenderWidgetHostViewAndroid::Focus() {
  host_->Focus();
  host_->SetInputMethodActive(true);
  ResetClipping();
  if (overscroll_effect_enabled_)
    overscroll_effect_->Enable();
}

void RenderWidgetHostViewAndroid::Blur() {
  host_->ExecuteEditCommand("Unselect", "");
  host_->SetInputMethodActive(false);
  host_->Blur();
  overscroll_effect_->Disable();
}

bool RenderWidgetHostViewAndroid::HasFocus() const {
  if (!content_view_core_)
    return false;  // ContentViewCore not created yet.

  return content_view_core_->HasFocus();
}

bool RenderWidgetHostViewAndroid::IsSurfaceAvailableForCopy() const {
  return HasValidFrame();
}

void RenderWidgetHostViewAndroid::Show() {
  if (are_layers_attached_)
    return;

  are_layers_attached_ = true;
  AttachLayers();

  WasShown();
}

void RenderWidgetHostViewAndroid::Hide() {
  if (!are_layers_attached_)
    return;

  are_layers_attached_ = false;
  RemoveLayers();

  WasHidden();
}

bool RenderWidgetHostViewAndroid::IsShowing() {
  // ContentViewCoreImpl represents the native side of the Java
  // ContentViewCore.  It being NULL means that it is not attached
  // to the View system yet, so we treat this RWHVA as hidden.
  return are_layers_attached_ && content_view_core_;
}

gfx::Rect RenderWidgetHostViewAndroid::GetViewBounds() const {
  if (!content_view_core_)
    return gfx::Rect(default_size_);

  gfx::Size size = content_view_core_->GetViewportSizeDip();
  gfx::Size offset = content_view_core_->GetViewportSizeOffsetDip();
  size.Enlarge(-offset.width(), -offset.height());

  return gfx::Rect(size);
}

gfx::Size RenderWidgetHostViewAndroid::GetPhysicalBackingSize() const {
  if (!content_view_core_)
    return gfx::Size();

  return content_view_core_->GetPhysicalBackingSize();
}

float RenderWidgetHostViewAndroid::GetOverdrawBottomHeight() const {
  if (!content_view_core_)
    return 0.f;

  return content_view_core_->GetOverdrawBottomHeightDip();
}

void RenderWidgetHostViewAndroid::UpdateCursor(const WebCursor& cursor) {
  // There are no cursors on Android.
}

void RenderWidgetHostViewAndroid::SetIsLoading(bool is_loading) {
  // Do nothing. The UI notification is handled through ContentViewClient which
  // is TabContentsDelegate.
}

void RenderWidgetHostViewAndroid::TextInputTypeChanged(
    ui::TextInputType type,
    ui::TextInputMode input_mode,
    bool can_compose_inline) {
  // Unused on Android, which uses OnTextInputChanged instead.
}

int RenderWidgetHostViewAndroid::GetNativeImeAdapter() {
  return reinterpret_cast<int>(&ime_adapter_android_);
}

void RenderWidgetHostViewAndroid::OnTextInputStateChanged(
    const ViewHostMsg_TextInputState_Params& params) {
  // If an acknowledgement is required for this event, regardless of how we exit
  // from this method, we must acknowledge that we processed the input state
  // change.
  base::ScopedClosureRunner ack_caller;
  if (params.require_ack)
    ack_caller.Reset(base::Bind(&SendImeEventAck, host_));

  if (!IsShowing())
    return;

  content_view_core_->UpdateImeAdapter(
      GetNativeImeAdapter(),
      static_cast<int>(params.type),
      params.value, params.selection_start, params.selection_end,
      params.composition_start, params.composition_end,
      params.show_ime_if_needed, params.require_ack);
}

void RenderWidgetHostViewAndroid::OnDidChangeBodyBackgroundColor(
    SkColor color) {
  if (cached_background_color_ == color)
    return;

  cached_background_color_ = color;
  if (content_view_core_)
    content_view_core_->OnBackgroundColorChanged(color);
}

void RenderWidgetHostViewAndroid::SendBeginFrame(
    const cc::BeginFrameArgs& args) {
  TRACE_EVENT0("cc", "RenderWidgetHostViewAndroid::SendBeginFrame");
  if (!host_)
    return;

  if (flush_input_requested_) {
    flush_input_requested_ = false;
    host_->FlushInput();
    content_view_core_->RemoveBeginFrameSubscriber();
  }

  host_->Send(new ViewMsg_BeginFrame(host_->GetRoutingID(), args));
}

void RenderWidgetHostViewAndroid::OnSetNeedsBeginFrame(
    bool enabled) {
  TRACE_EVENT1("cc", "RenderWidgetHostViewAndroid::OnSetNeedsBeginFrame",
               "enabled", enabled);
  // ContentViewCoreImpl handles multiple subscribers to the BeginFrame, so
  // we have to make sure calls to ContentViewCoreImpl's
  // {Add,Remove}BeginFrameSubscriber are balanced, even if
  // RenderWidgetHostViewAndroid's may not be.
  if (content_view_core_ && needs_begin_frame_ != enabled) {
    if (enabled)
      content_view_core_->AddBeginFrameSubscriber();
    else
      content_view_core_->RemoveBeginFrameSubscriber();
    needs_begin_frame_ = enabled;
  }
}

void RenderWidgetHostViewAndroid::OnStartContentIntent(
    const GURL& content_url) {
  if (content_view_core_)
    content_view_core_->StartContentIntent(content_url);
}

void RenderWidgetHostViewAndroid::OnSmartClipDataExtracted(
    const string16& result) {
  // Custom serialization over IPC isn't allowed normally for security reasons.
  // Since this feature is only used in (single-process) WebView, there are no
  // security issues. Enforce that it's only called in single process mode.
  CHECK(RenderProcessHost::run_renderer_in_process());
  if (content_view_core_)
    content_view_core_->OnSmartClipDataExtracted(result);
}

void RenderWidgetHostViewAndroid::ImeCancelComposition() {
  ime_adapter_android_.CancelComposition();
}

void RenderWidgetHostViewAndroid::DidUpdateBackingStore(
    const gfx::Rect& scroll_rect,
    const gfx::Vector2d& scroll_delta,
    const std::vector<gfx::Rect>& copy_rects,
    const ui::LatencyInfo& latency_info) {
  NOTIMPLEMENTED();
}

void RenderWidgetHostViewAndroid::RenderProcessGone(
    base::TerminationStatus status, int error_code) {
  Destroy();
}

void RenderWidgetHostViewAndroid::Destroy() {
  RemoveLayers();
  SetContentViewCore(NULL);

  // The RenderWidgetHost's destruction led here, so don't call it.
  host_ = NULL;

  delete this;
}

void RenderWidgetHostViewAndroid::SetTooltipText(
    const base::string16& tooltip_text) {
  // Tooltips don't makes sense on Android.
}

void RenderWidgetHostViewAndroid::SelectionChanged(const base::string16& text,
                                                   size_t offset,
                                                   const gfx::Range& range) {
  RenderWidgetHostViewBase::SelectionChanged(text, offset, range);

  if (text.empty() || range.is_empty() || !content_view_core_)
    return;
  size_t pos = range.GetMin() - offset;
  size_t n = range.length();

  DCHECK(pos + n <= text.length()) << "The text can not fully cover range.";
  if (pos >= text.length()) {
    NOTREACHED() << "The text can not cover range.";
    return;
  }

  std::string utf8_selection = UTF16ToUTF8(text.substr(pos, n));

  content_view_core_->OnSelectionChanged(utf8_selection);
}

void RenderWidgetHostViewAndroid::SelectionBoundsChanged(
    const ViewHostMsg_SelectionBounds_Params& params) {
  if (content_view_core_) {
    content_view_core_->OnSelectionBoundsChanged(params);
  }
}

void RenderWidgetHostViewAndroid::ScrollOffsetChanged() {
}

BackingStore* RenderWidgetHostViewAndroid::AllocBackingStore(
    const gfx::Size& size) {
  NOTIMPLEMENTED();
  return NULL;
}

void RenderWidgetHostViewAndroid::SetBackground(const SkBitmap& background) {
  RenderWidgetHostViewBase::SetBackground(background);
  host_->Send(new ViewMsg_SetBackground(host_->GetRoutingID(), background));
}

void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(
    const gfx::Rect& src_subrect,
    const gfx::Size& dst_size,
    const base::Callback<void(bool, const SkBitmap&)>& callback) {
  if (!using_synchronous_compositor_ && !IsSurfaceAvailableForCopy()) {
    callback.Run(false, SkBitmap());
    return;
  }

  const gfx::Display& display =
      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
  float device_scale_factor = display.device_scale_factor();

  DCHECK_EQ(device_scale_factor,
            ui::GetImageScale(GetScaleFactorForView(this)));

  const gfx::Size& dst_size_in_pixel = ConvertViewSizeToPixel(this, dst_size);
  gfx::Rect src_subrect_in_pixel =
      ConvertRectToPixel(device_scale_factor, src_subrect);

  if (using_synchronous_compositor_) {
    SynchronousCopyContents(src_subrect_in_pixel, dst_size_in_pixel, callback);
    return;
  }

  scoped_ptr<cc::CopyOutputRequest> request;
  if (src_subrect_in_pixel.size() == dst_size_in_pixel) {
      request = cc::CopyOutputRequest::CreateBitmapRequest(base::Bind(
          &RenderWidgetHostViewAndroid::PrepareBitmapCopyOutputResult,
          dst_size_in_pixel,
          callback));
  } else {
      request = cc::CopyOutputRequest::CreateRequest(base::Bind(
          &RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult,
          dst_size_in_pixel,
          callback));
  }
  request->set_area(src_subrect_in_pixel);
  layer_->RequestCopyOfOutput(request.Pass());
}

void RenderWidgetHostViewAndroid::CopyFromCompositingSurfaceToVideoFrame(
      const gfx::Rect& src_subrect,
      const scoped_refptr<media::VideoFrame>& target,
      const base::Callback<void(bool)>& callback) {
  NOTIMPLEMENTED();
  callback.Run(false);
}

bool RenderWidgetHostViewAndroid::CanCopyToVideoFrame() const {
  return false;
}

void RenderWidgetHostViewAndroid::ShowDisambiguationPopup(
    const gfx::Rect& target_rect, const SkBitmap& zoomed_bitmap) {
  if (!content_view_core_)
    return;

  content_view_core_->ShowDisambiguationPopup(target_rect, zoomed_bitmap);
}

scoped_ptr<SyntheticGestureTarget>
RenderWidgetHostViewAndroid::CreateSyntheticGestureTarget() {
  return scoped_ptr<SyntheticGestureTarget>(new SyntheticGestureTargetAndroid(
      host_, content_view_core_->CreateTouchEventSynthesizer()));
}

void RenderWidgetHostViewAndroid::OnAcceleratedCompositingStateChange() {
}

void RenderWidgetHostViewAndroid::SendDelegatedFrameAck(
    uint32 output_surface_id) {
  cc::CompositorFrameAck ack;
  if (resource_collection_.get())
    resource_collection_->TakeUnusedResourcesForChildCompositor(&ack.resources);
  RenderWidgetHostImpl::SendSwapCompositorFrameAck(host_->GetRoutingID(),
                                                   output_surface_id,
                                                   host_->GetProcess()->GetID(),
                                                   ack);
}

void RenderWidgetHostViewAndroid::UnusedResourcesAreAvailable() {
  // TODO(danakj): If no ack is pending, collect and send resources now.
}

void RenderWidgetHostViewAndroid::DestroyDelegatedContent() {
  if (are_layers_attached_)
    RemoveLayers();
  frame_provider_ = NULL;
  delegated_renderer_layer_ = NULL;
  layer_ = NULL;
}

void RenderWidgetHostViewAndroid::SwapDelegatedFrame(
    uint32 output_surface_id,
    scoped_ptr<cc::DelegatedFrameData> frame_data) {
  bool has_content = !texture_size_in_layer_.IsEmpty();

  if (output_surface_id != last_output_surface_id_) {
    // TODO(danakj): Lose all resources and send them back here, such as:
    // resource_collection_->LoseAllResources();
    // SendReturnedDelegatedResources(last_output_surface_id_);

    // Drop the cc::DelegatedFrameResourceCollection so that we will not return
    // any resources from the old output surface with the new output surface id.
    if (resource_collection_.get()) {
      resource_collection_->SetClient(NULL);
      resource_collection_ = NULL;
    }
    DestroyDelegatedContent();

    last_output_surface_id_ = output_surface_id;
  }

  if (!has_content) {
    DestroyDelegatedContent();
  } else {
    if (!resource_collection_.get()) {
      resource_collection_ = new cc::DelegatedFrameResourceCollection;
      resource_collection_->SetClient(this);
    }
    if (!frame_provider_ ||
        texture_size_in_layer_ != frame_provider_->frame_size()) {
      if (are_layers_attached_)
        RemoveLayers();
      frame_provider_ = new cc::DelegatedFrameProvider(
          resource_collection_.get(), frame_data.Pass());
      delegated_renderer_layer_ =
          cc::DelegatedRendererLayer::Create(frame_provider_);
      layer_ = delegated_renderer_layer_;
      if (are_layers_attached_)
        AttachLayers();
    } else {
      frame_provider_->SetFrameData(frame_data.Pass());
    }
  }

  if (delegated_renderer_layer_.get()) {
    delegated_renderer_layer_->SetDisplaySize(texture_size_in_layer_);
    delegated_renderer_layer_->SetIsDrawable(true);
    delegated_renderer_layer_->SetContentsOpaque(true);
    delegated_renderer_layer_->SetBounds(content_size_in_layer_);
    delegated_renderer_layer_->SetNeedsDisplay();
  }

  base::Closure ack_callback =
      base::Bind(&RenderWidgetHostViewAndroid::SendDelegatedFrameAck,
                 weak_ptr_factory_.GetWeakPtr(),
                 output_surface_id);

  if (host_->is_hidden())
    ack_callback.Run();
  else
    ack_callbacks_.push(ack_callback);
}

void RenderWidgetHostViewAndroid::ComputeContentsSize(
    const cc::CompositorFrameMetadata& frame_metadata) {
  // Calculate the content size.  This should be 0 if the texture_size is 0.
  gfx::Vector2dF offset;
  if (texture_size_in_layer_.GetArea() > 0)
    offset = frame_metadata.location_bar_content_translation;
  offset.set_y(offset.y() + frame_metadata.overdraw_bottom_height);
  offset.Scale(frame_metadata.device_scale_factor);
  content_size_in_layer_ =
      gfx::Size(texture_size_in_layer_.width() - offset.x(),
                texture_size_in_layer_.height() - offset.y());
  // Content size changes should be reflected in associated animation effects.
  UpdateAnimationSize(frame_metadata);
}

void RenderWidgetHostViewAndroid::OnSwapCompositorFrame(
    uint32 output_surface_id,
    scoped_ptr<cc::CompositorFrame> frame) {
  // Always let ContentViewCore know about the new frame first, so it can decide
  // to schedule a Draw immediately when it sees the texture layer invalidation.
  UpdateContentViewCoreFrameMetadata(frame->metadata);

  if (frame->delegated_frame_data) {
    DCHECK(UsingDelegatedRenderer());

    DCHECK(frame->delegated_frame_data);
    DCHECK(!frame->delegated_frame_data->render_pass_list.empty());

    cc::RenderPass* root_pass =
        frame->delegated_frame_data->render_pass_list.back();
    texture_size_in_layer_ = root_pass->output_rect.size();
    ComputeContentsSize(frame->metadata);

    SwapDelegatedFrame(output_surface_id, frame->delegated_frame_data.Pass());
    return;
  }

  DCHECK(!UsingDelegatedRenderer());

  if (!frame->gl_frame_data || frame->gl_frame_data->mailbox.IsZero())
    return;

  if (output_surface_id != last_output_surface_id_) {
    current_mailbox_ = gpu::Mailbox();
    last_output_surface_id_ = kUndefinedOutputSurfaceId;
  }

  base::Closure callback = base::Bind(&InsertSyncPointAndAckForCompositor,
                                      host_->GetProcess()->GetID(),
                                      output_surface_id,
                                      host_->GetRoutingID(),
                                      current_mailbox_,
                                      texture_size_in_layer_);
  ImageTransportFactoryAndroid::GetInstance()->WaitSyncPoint(
      frame->gl_frame_data->sync_point);

  texture_size_in_layer_ = frame->gl_frame_data->size;
  ComputeContentsSize(frame->metadata);

  if (layer_->layer_tree_host()) {
    scoped_ptr<cc::SwapPromise> swap_promise(
        new cc::LatencyInfoSwapPromise(frame->metadata.latency_info));
    layer_->layer_tree_host()->QueueSwapPromise(swap_promise.Pass());
  }

  BuffersSwapped(frame->gl_frame_data->mailbox, output_surface_id, callback);
}

void RenderWidgetHostViewAndroid::SynchronousFrameMetadata(
    const cc::CompositorFrameMetadata& frame_metadata) {
  // This is a subset of OnSwapCompositorFrame() used in the synchronous
  // compositor flow.
  UpdateContentViewCoreFrameMetadata(frame_metadata);
  ComputeContentsSize(frame_metadata);

  // DevTools ScreenCast support for Android WebView.
  if (DevToolsAgentHost::HasFor(RenderViewHost::From(GetRenderWidgetHost()))) {
    scoped_refptr<DevToolsAgentHost> dtah =
        DevToolsAgentHost::GetOrCreateFor(
            RenderViewHost::From(GetRenderWidgetHost()));
    // Unblock the compositor.
    BrowserThread::PostTask(
        BrowserThread::UI, FROM_HERE,
        base::Bind(&RenderViewDevToolsAgentHost::SynchronousSwapCompositorFrame,
                   static_cast<RenderViewDevToolsAgentHost*>(dtah.get()),
                   frame_metadata));
  }
}

void RenderWidgetHostViewAndroid::SynchronousCopyContents(
    const gfx::Rect& src_subrect_in_pixel,
    const gfx::Size& dst_size_in_pixel,
    const base::Callback<void(bool, const SkBitmap&)>& callback) {
  SynchronousCompositor* compositor =
      SynchronousCompositorImpl::FromID(host_->GetProcess()->GetID(),
                                        host_->GetRoutingID());
  if (!compositor) {
    callback.Run(false, SkBitmap());
    return;
  }

  SkBitmap bitmap;
  bitmap.setConfig(SkBitmap::kARGB_8888_Config,
                   dst_size_in_pixel.width(),
                   dst_size_in_pixel.height());
  bitmap.allocPixels();
  SkCanvas canvas(bitmap);
  canvas.scale(
      (float)dst_size_in_pixel.width() / (float)src_subrect_in_pixel.width(),
      (float)dst_size_in_pixel.height() / (float)src_subrect_in_pixel.height());
  compositor->DemandDrawSw(&canvas);
  callback.Run(true, bitmap);
}

void RenderWidgetHostViewAndroid::UpdateContentViewCoreFrameMetadata(
    const cc::CompositorFrameMetadata& frame_metadata) {
  if (content_view_core_) {
    // All offsets and sizes are in CSS pixels.
    content_view_core_->UpdateFrameInfo(
        frame_metadata.root_scroll_offset,
        frame_metadata.page_scale_factor,
        gfx::Vector2dF(frame_metadata.min_page_scale_factor,
                       frame_metadata.max_page_scale_factor),
        frame_metadata.root_layer_size,
        frame_metadata.viewport_size,
        frame_metadata.location_bar_offset,
        frame_metadata.location_bar_content_translation,
        frame_metadata.overdraw_bottom_height);
  }
}

void RenderWidgetHostViewAndroid::AcceleratedSurfaceInitialized(int host_id,
                                                                int route_id) {
  accelerated_surface_route_id_ = route_id;
}

void RenderWidgetHostViewAndroid::AcceleratedSurfaceBuffersSwapped(
    const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
    int gpu_host_id) {
  NOTREACHED() << "Need --composite-to-mailbox or --enable-delegated-renderer";
}

void RenderWidgetHostViewAndroid::BuffersSwapped(
    const gpu::Mailbox& mailbox,
    uint32_t output_surface_id,
    const base::Closure& ack_callback) {
  ImageTransportFactoryAndroid* factory =
      ImageTransportFactoryAndroid::GetInstance();

  if (!texture_id_in_layer_) {
    texture_id_in_layer_ = factory->CreateTexture();
    texture_layer_->SetTextureId(texture_id_in_layer_);
    texture_layer_->SetIsDrawable(true);
    texture_layer_->SetContentsOpaque(true);
  }

  ImageTransportFactoryAndroid::GetInstance()->AcquireTexture(
      texture_id_in_layer_, mailbox.name);

  ResetClipping();

  current_mailbox_ = mailbox;
  last_output_surface_id_ = output_surface_id;

  if (host_->is_hidden())
    ack_callback.Run();
  else
    ack_callbacks_.push(ack_callback);
}

void RenderWidgetHostViewAndroid::AttachLayers() {
  if (!content_view_core_)
    return;
  if (!layer_.get())
    return;

  content_view_core_->AttachLayer(layer_);
  if (overscroll_effect_enabled_)
    overscroll_effect_->Enable();
}

void RenderWidgetHostViewAndroid::RemoveLayers() {
  if (!content_view_core_)
    return;
  if (!layer_.get())
    return;

  content_view_core_->RemoveLayer(layer_);
  overscroll_effect_->Disable();
}

bool RenderWidgetHostViewAndroid::Animate(base::TimeTicks frame_time) {
  return overscroll_effect_->Animate(frame_time);
}

void RenderWidgetHostViewAndroid::UpdateAnimationSize(
    const cc::CompositorFrameMetadata& frame_metadata) {
  // Disable edge effects for axes on which scrolling is impossible.
  gfx::SizeF ceiled_viewport_size =
      gfx::ToCeiledSize(frame_metadata.viewport_size);
  overscroll_effect_->set_horizontal_overscroll_enabled(
      ceiled_viewport_size.width() < frame_metadata.root_layer_size.width());
  overscroll_effect_->set_vertical_overscroll_enabled(
      ceiled_viewport_size.height() < frame_metadata.root_layer_size.height());
  overscroll_effect_->set_size(content_size_in_layer_);
}

void RenderWidgetHostViewAndroid::AcceleratedSurfacePostSubBuffer(
    const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
    int gpu_host_id) {
  NOTREACHED();
}

void RenderWidgetHostViewAndroid::AcceleratedSurfaceSuspend() {
  NOTREACHED();
}

void RenderWidgetHostViewAndroid::AcceleratedSurfaceRelease() {
  // This tells us we should free the frontbuffer.
  if (texture_id_in_layer_) {
    texture_layer_->SetTextureId(0);
    texture_layer_->SetIsDrawable(false);
    ImageTransportFactoryAndroid::GetInstance()->DeleteTexture(
        texture_id_in_layer_);
    texture_id_in_layer_ = 0;
    current_mailbox_ = gpu::Mailbox();
    last_output_surface_id_ = kUndefinedOutputSurfaceId;
  }
  if (delegated_renderer_layer_.get())
    DestroyDelegatedContent();
}

bool RenderWidgetHostViewAndroid::HasAcceleratedSurface(
    const gfx::Size& desired_size) {
  NOTREACHED();
  return false;
}

void RenderWidgetHostViewAndroid::GetScreenInfo(blink::WebScreenInfo* result) {
  // ScreenInfo isn't tied to the widget on Android. Always return the default.
  RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
}

// TODO(jrg): Find out the implications and answer correctly here,
// as we are returning the WebView and not root window bounds.
gfx::Rect RenderWidgetHostViewAndroid::GetBoundsInRootWindow() {
  return GetViewBounds();
}

gfx::GLSurfaceHandle RenderWidgetHostViewAndroid::GetCompositingSurface() {
  gfx::GLSurfaceHandle handle =
      gfx::GLSurfaceHandle(gfx::kNullPluginWindow, gfx::NATIVE_TRANSPORT);
  if (CompositorImpl::IsInitialized()) {
    handle.parent_client_id =
        ImageTransportFactoryAndroid::GetInstance()->GetChannelID();
  }
  return handle;
}

void RenderWidgetHostViewAndroid::ProcessAckedTouchEvent(
    const TouchEventWithLatencyInfo& touch, InputEventAckState ack_result) {
  if (content_view_core_)
    content_view_core_->ConfirmTouchEvent(ack_result);
}

void RenderWidgetHostViewAndroid::SetHasHorizontalScrollbar(
    bool has_horizontal_scrollbar) {
  // intentionally empty, like RenderWidgetHostViewViews
}

void RenderWidgetHostViewAndroid::SetScrollOffsetPinning(
    bool is_pinned_to_left, bool is_pinned_to_right) {
  // intentionally empty, like RenderWidgetHostViewViews
}

void RenderWidgetHostViewAndroid::UnhandledWheelEvent(
    const blink::WebMouseWheelEvent& event) {
  // intentionally empty, like RenderWidgetHostViewViews
}

void RenderWidgetHostViewAndroid::GestureEventAck(
    int gesture_event_type,
    InputEventAckState ack_result) {
  if (gesture_event_type == blink::WebInputEvent::GestureScrollUpdate &&
      ack_result == INPUT_EVENT_ACK_STATE_CONSUMED) {
    content_view_core_->OnScrollUpdateGestureConsumed();
  }
  if (gesture_event_type == blink::WebInputEvent::GestureFlingStart &&
      ack_result == INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS) {
    content_view_core_->UnhandledFlingStartEvent();
  }
}

InputEventAckState RenderWidgetHostViewAndroid::FilterInputEvent(
    const blink::WebInputEvent& input_event) {
  if (!host_)
    return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;

  if (input_event.type == blink::WebInputEvent::GestureTapDown ||
      input_event.type == blink::WebInputEvent::TouchStart) {
    GpuDataManagerImpl* gpu_data = GpuDataManagerImpl::GetInstance();
    GpuProcessHostUIShim* shim = GpuProcessHostUIShim::GetOneInstance();
    if (shim && gpu_data && accelerated_surface_route_id_ &&
        gpu_data->IsDriverBugWorkaroundActive(gpu::WAKE_UP_GPU_BEFORE_DRAWING))
      shim->Send(
          new AcceleratedSurfaceMsg_WakeUpGpu(accelerated_surface_route_id_));
  }

  SynchronousCompositorImpl* compositor =
      SynchronousCompositorImpl::FromID(host_->GetProcess()->GetID(),
                                          host_->GetRoutingID());
  if (compositor)
    return compositor->HandleInputEvent(input_event);
  return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
}

void RenderWidgetHostViewAndroid::OnSetNeedsFlushInput() {
  if (flush_input_requested_ || !content_view_core_)
    return;
  flush_input_requested_ = true;
  content_view_core_->AddBeginFrameSubscriber();
}

void RenderWidgetHostViewAndroid::OnAccessibilityEvents(
    const std::vector<AccessibilityHostMsg_EventParams>& params) {
  if (!host_ || host_->accessibility_mode() != AccessibilityModeComplete)
    return;

  if (!GetBrowserAccessibilityManager()) {
    base::android::ScopedJavaLocalRef<jobject> obj;
    if (content_view_core_)
      obj = content_view_core_->GetJavaObject();
    SetBrowserAccessibilityManager(
        new BrowserAccessibilityManagerAndroid(
            obj, BrowserAccessibilityManagerAndroid::GetEmptyDocument(), this));
  }
  GetBrowserAccessibilityManager()->OnAccessibilityEvents(params);
}

void RenderWidgetHostViewAndroid::SetAccessibilityFocus(int acc_obj_id) {
  if (!host_)
    return;

  host_->AccessibilitySetFocus(acc_obj_id);
}

void RenderWidgetHostViewAndroid::AccessibilityDoDefaultAction(int acc_obj_id) {
  if (!host_)
    return;

  host_->AccessibilityDoDefaultAction(acc_obj_id);
}

void RenderWidgetHostViewAndroid::AccessibilityScrollToMakeVisible(
    int acc_obj_id, gfx::Rect subfocus) {
  if (!host_)
    return;

  host_->AccessibilityScrollToMakeVisible(acc_obj_id, subfocus);
}

void RenderWidgetHostViewAndroid::AccessibilityScrollToPoint(
    int acc_obj_id, gfx::Point point) {
  if (!host_)
    return;

  host_->AccessibilityScrollToPoint(acc_obj_id, point);
}

void RenderWidgetHostViewAndroid::AccessibilitySetTextSelection(
    int acc_obj_id, int start_offset, int end_offset) {
  if (!host_)
    return;

  host_->AccessibilitySetTextSelection(
      acc_obj_id, start_offset, end_offset);
}

gfx::Point RenderWidgetHostViewAndroid::GetLastTouchEventLocation() const {
  NOTIMPLEMENTED();
  // Only used on Win8
  return gfx::Point();
}

void RenderWidgetHostViewAndroid::FatalAccessibilityTreeError() {
  if (!host_)
    return;

  host_->FatalAccessibilityTreeError();
  SetBrowserAccessibilityManager(NULL);
}

bool RenderWidgetHostViewAndroid::LockMouse() {
  NOTIMPLEMENTED();
  return false;
}

void RenderWidgetHostViewAndroid::UnlockMouse() {
  NOTIMPLEMENTED();
}

// Methods called from the host to the render

void RenderWidgetHostViewAndroid::SendKeyEvent(
    const NativeWebKeyboardEvent& event) {
  if (host_)
    host_->ForwardKeyboardEvent(event);
}

void RenderWidgetHostViewAndroid::SendTouchEvent(
    const blink::WebTouchEvent& event) {
  if (host_)
    host_->ForwardTouchEventWithLatencyInfo(event, ui::LatencyInfo());
}


void RenderWidgetHostViewAndroid::SendMouseEvent(
    const blink::WebMouseEvent& event) {
  if (host_)
    host_->ForwardMouseEvent(event);
}

void RenderWidgetHostViewAndroid::SendMouseWheelEvent(
    const blink::WebMouseWheelEvent& event) {
  if (host_)
    host_->ForwardWheelEvent(event);
}

void RenderWidgetHostViewAndroid::SendGestureEvent(
    const blink::WebGestureEvent& event) {
  // Sending a gesture that may trigger overscroll should resume the effect.
  if (overscroll_effect_enabled_)
   overscroll_effect_->Enable();

  if (host_)
    host_->ForwardGestureEvent(event);
}

void RenderWidgetHostViewAndroid::SelectRange(const gfx::Point& start,
                                              const gfx::Point& end) {
  if (host_)
    host_->SelectRange(start, end);
}

void RenderWidgetHostViewAndroid::MoveCaret(const gfx::Point& point) {
  if (host_)
    host_->MoveCaret(point);
}

void RenderWidgetHostViewAndroid::RequestContentClipping(
    const gfx::Rect& clipping,
    const gfx::Size& content_size) {
  // A focused view provides its own clipping.
  if (HasFocus())
    return;

  ClipContents(clipping, content_size);
}

void RenderWidgetHostViewAndroid::ResetClipping() {
  ClipContents(gfx::Rect(gfx::Point(), content_size_in_layer_),
               content_size_in_layer_);
}

void RenderWidgetHostViewAndroid::ClipContents(const gfx::Rect& clipping,
                                               const gfx::Size& content_size) {
  if (!texture_id_in_layer_ || content_size_in_layer_.IsEmpty())
    return;

  gfx::Size clipped_content(content_size_in_layer_);
  clipped_content.SetToMin(clipping.size());
  texture_layer_->SetBounds(clipped_content);
  texture_layer_->SetNeedsDisplay();

  if (texture_size_in_layer_.IsEmpty()) {
    texture_layer_->SetUV(gfx::PointF(), gfx::PointF());
    return;
  }

  gfx::PointF offset(
      clipping.x() + content_size_in_layer_.width() - content_size.width(),
      clipping.y() + content_size_in_layer_.height() - content_size.height());
  offset.SetToMax(gfx::PointF());

  gfx::Vector2dF uv_scale(1.f / texture_size_in_layer_.width(),
                          1.f / texture_size_in_layer_.height());
  texture_layer_->SetUV(
      gfx::PointF(offset.x() * uv_scale.x(),
                  offset.y() * uv_scale.y()),
      gfx::PointF((offset.x() + clipped_content.width()) * uv_scale.x(),
                  (offset.y() + clipped_content.height()) * uv_scale.y()));
}

SkColor RenderWidgetHostViewAndroid::GetCachedBackgroundColor() const {
  return cached_background_color_;
}

void RenderWidgetHostViewAndroid::OnOverscrolled(
    gfx::Vector2dF accumulated_overscroll,
    gfx::Vector2dF current_fling_velocity) {
  if (!content_view_core_ || !are_layers_attached_)
    return;

  if (overscroll_effect_->OnOverscrolled(content_view_core_->GetLayer(),
                                         base::TimeTicks::Now(),
                                         accumulated_overscroll,
                                         current_fling_velocity)) {
    content_view_core_->SetNeedsAnimate();
  }
}

void RenderWidgetHostViewAndroid::SetContentViewCore(
    ContentViewCoreImpl* content_view_core) {
  RunAckCallbacks();

  if (are_layers_attached_)
    RemoveLayers();

  if (content_view_core_ && !using_synchronous_compositor_)
    content_view_core_->GetWindowAndroid()->RemoveObserver(this);

  content_view_core_ = content_view_core;

  if (GetBrowserAccessibilityManager()) {
    base::android::ScopedJavaLocalRef<jobject> obj;
    if (content_view_core_)
      obj = content_view_core_->GetJavaObject();
    GetBrowserAccessibilityManager()->ToBrowserAccessibilityManagerAndroid()->
        SetContentViewCore(obj);
  }

  if (are_layers_attached_) {
    AttachLayers();
    if (content_view_core_ && !using_synchronous_compositor_)
      content_view_core_->GetWindowAndroid()->AddObserver(this);
  }

  // Ensure ContentsViewCore is aware of the current touch handling state, eg.
  // in case we've already been running JS for the page as part of preload.
  if (content_view_core_ && host_)
    content_view_core_->HasTouchEventHandlers(host_->has_touch_handler());
}

void RenderWidgetHostViewAndroid::RunAckCallbacks() {
  while (!ack_callbacks_.empty()) {
    ack_callbacks_.front().Run();
    ack_callbacks_.pop();
  }
}

void RenderWidgetHostViewAndroid::HasTouchEventHandlers(
    bool need_touch_events) {
  if (content_view_core_)
    content_view_core_->HasTouchEventHandlers(need_touch_events);
}

void RenderWidgetHostViewAndroid::OnCompositingDidCommit() {
  RunAckCallbacks();
}

void RenderWidgetHostViewAndroid::OnDetachCompositor() {
  DCHECK(content_view_core_);
  DCHECK(!using_synchronous_compositor_);
  RunAckCallbacks();
}

void RenderWidgetHostViewAndroid::OnLostResources() {
  if (texture_layer_.get())
    texture_layer_->SetIsDrawable(false);
  if (delegated_renderer_layer_.get())
    DestroyDelegatedContent();
  texture_id_in_layer_ = 0;
  RunAckCallbacks();
}

// static
void RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult(
    const gfx::Size& dst_size_in_pixel,
    const base::Callback<void(bool, const SkBitmap&)>& callback,
    scoped_ptr<cc::CopyOutputResult> result) {
  DCHECK(result->HasTexture());
  base::ScopedClosureRunner scoped_callback_runner(
      base::Bind(callback, false, SkBitmap()));

  if (!result->HasTexture() || result->IsEmpty() || result->size().IsEmpty())
    return;

  scoped_ptr<SkBitmap> bitmap(new SkBitmap);
  bitmap->setConfig(SkBitmap::kARGB_8888_Config,
                    dst_size_in_pixel.width(), dst_size_in_pixel.height(),
                    0, kOpaque_SkAlphaType);
  if (!bitmap->allocPixels())
    return;

  ImageTransportFactoryAndroid* factory =
      ImageTransportFactoryAndroid::GetInstance();
  GLHelper* gl_helper = factory->GetGLHelper();
  if (!gl_helper)
    return;

  scoped_ptr<SkAutoLockPixels> bitmap_pixels_lock(
      new SkAutoLockPixels(*bitmap));
  uint8* pixels = static_cast<uint8*>(bitmap->getPixels());

  cc::TextureMailbox texture_mailbox;
  scoped_ptr<cc::SingleReleaseCallback> release_callback;
  result->TakeTexture(&texture_mailbox, &release_callback);
  DCHECK(texture_mailbox.IsTexture());
  if (!texture_mailbox.IsTexture())
    return;

  ignore_result(scoped_callback_runner.Release());

  gl_helper->CropScaleReadbackAndCleanMailbox(
      texture_mailbox.name(),
      texture_mailbox.sync_point(),
      result->size(),
      gfx::Rect(result->size()),
      dst_size_in_pixel,
      pixels,
      base::Bind(&CopyFromCompositingSurfaceFinished,
                 callback,
                 base::Passed(&release_callback),
                 base::Passed(&bitmap),
                 base::Passed(&bitmap_pixels_lock)));
}

// static
void RenderWidgetHostViewAndroid::PrepareBitmapCopyOutputResult(
    const gfx::Size& dst_size_in_pixel,
    const base::Callback<void(bool, const SkBitmap&)>& callback,
    scoped_ptr<cc::CopyOutputResult> result) {
  DCHECK(result->HasBitmap());
  base::ScopedClosureRunner scoped_callback_runner(
      base::Bind(callback, false, SkBitmap()));

  if (!result->HasBitmap() || result->IsEmpty() || result->size().IsEmpty())
    return;

  scoped_ptr<SkBitmap> source = result->TakeBitmap();
  DCHECK(source);
  if (!source)
    return;

  DCHECK_EQ(source->width(), dst_size_in_pixel.width());
  DCHECK_EQ(source->height(), dst_size_in_pixel.height());

  ignore_result(scoped_callback_runner.Release());
  callback.Run(true, *source);
}

// static
void RenderWidgetHostViewPort::GetDefaultScreenInfo(
    blink::WebScreenInfo* results) {
  const gfx::Display& display =
      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
  results->rect = display.bounds();
  // TODO(husky): Remove any system controls from availableRect.
  results->availableRect = display.work_area();
  results->deviceScaleFactor = display.device_scale_factor();
  gfx::DeviceDisplayInfo info;
  results->depth = info.GetBitsPerPixel();
  results->depthPerComponent = info.GetBitsPerComponent();
  results->isMonochrome = (results->depthPerComponent == 0);
}

////////////////////////////////////////////////////////////////////////////////
// RenderWidgetHostView, public:

// static
RenderWidgetHostView*
RenderWidgetHostView::CreateViewForWidget(RenderWidgetHost* widget) {
  RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(widget);
  return new RenderWidgetHostViewAndroid(rwhi, NULL);
}

} // namespace content