Compositor bindings for mojo html_viewer

mojo/services/html_viewer/weblayertreeview_impl.cc

+// 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.
+
+#include "mojo/services/html_viewer/weblayertreeview_impl.h"
+
+#include "base/message_loop/message_loop_proxy.h"
+#include "cc/blink/web_layer_impl.h"
+#include "cc/layers/layer.h"
+#include "cc/output/begin_frame_args.h"
+#include "cc/trees/layer_tree_host.h"
+#include "mojo/cc/context_provider_mojo.h"
+#include "mojo/cc/output_surface_mojo.h"
+#include "mojo/services/public/cpp/surfaces/surfaces_type_converters.h"
+#include "mojo/services/public/cpp/view_manager/view.h"
+#include "third_party/WebKit/public/web/WebWidget.h"
+
+namespace mojo {
+
+WebLayerTreeViewImpl::WebLayerTreeViewImpl(
+    scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy,
+    SurfacesServicePtr surfaces_service,
+    GpuPtr gpu_service)
+    : widget_(NULL),
+      view_(NULL),
+      surfaces_service_(surfaces_service.Pass()),
+      gpu_service_(gpu_service.Pass()),
+      main_thread_compositor_task_runner_(base::MessageLoopProxy::current()),
+      weak_factory_(this) {
+  main_thread_bound_weak_ptr_ = weak_factory_.GetWeakPtr();
+  surfaces_service_->CreateSurfaceConnection(
+      base::Bind(&WebLayerTreeViewImpl::OnSurfaceConnectionCreated,
+                 main_thread_bound_weak_ptr_));
+
+  cc::LayerTreeSettings settings;
+
+  // For web contents, layer transforms should scale up the contents of layers
+  // to keep content always crisp when possible.
+  settings.layer_transforms_should_scale_layer_contents = true;
+
+  cc::SharedBitmapManager* shared_bitmap_manager = NULL;
+
+  layer_tree_host_ =
+      cc::LayerTreeHost::CreateThreaded(this,
+                                        shared_bitmap_manager,
+                                        settings,
+                                        base::MessageLoopProxy::current(),
+                                        compositor_message_loop_proxy);
+  DCHECK(layer_tree_host_);
+}
+
+WebLayerTreeViewImpl::~WebLayerTreeViewImpl() {
+}
+
+void WebLayerTreeViewImpl::WillBeginMainFrame(int frame_id) {
+}
+
+void WebLayerTreeViewImpl::DidBeginMainFrame() {
+}
+
+void WebLayerTreeViewImpl::BeginMainFrame(const cc::BeginFrameArgs& args) {
+  VLOG(2) << "WebLayerTreeViewImpl::BeginMainFrame";
+  double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
+  double deadline_sec = (args.deadline - base::TimeTicks()).InSecondsF();
+  double interval_sec = args.interval.InSecondsF();
+  blink::WebBeginFrameArgs web_begin_frame_args(
+      frame_time_sec, deadline_sec, interval_sec);
+  widget_->beginFrame(web_begin_frame_args);
+}
+
+void WebLayerTreeViewImpl::Layout() {
+  widget_->layout();
+}
+
+void WebLayerTreeViewImpl::ApplyViewportDeltas(
+    const gfx::Vector2d& scroll_delta,
+    float page_scale,
+    float top_controls_delta) {
+  widget_->applyViewportDeltas(scroll_delta, page_scale, top_controls_delta);
+}
+
+scoped_ptr<cc::OutputSurface> WebLayerTreeViewImpl::CreateOutputSurface(
+    bool fallback) {
+  return output_surface_.Pass();
+}
+
+void WebLayerTreeViewImpl::DidInitializeOutputSurface() {
+}
+
+void WebLayerTreeViewImpl::WillCommit() {
+}
+
+void WebLayerTreeViewImpl::DidCommit() {
+  widget_->didCommitFrameToCompositor();
+}
+
+void WebLayerTreeViewImpl::DidCommitAndDrawFrame() {
+}
+
+void WebLayerTreeViewImpl::DidCompleteSwapBuffers() {
+}
+
+void WebLayerTreeViewImpl::setSurfaceReady() {
+}
+
+void WebLayerTreeViewImpl::setRootLayer(const blink::WebLayer& layer) {
+  layer_tree_host_->SetRootLayer(
+      static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
+}
+
+void WebLayerTreeViewImpl::clearRootLayer() {
+  layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
+}
+
+void WebLayerTreeViewImpl::setViewportSize(
+    const blink::WebSize& device_viewport_size) {
+  layer_tree_host_->SetViewportSize(device_viewport_size);
+}
+
+blink::WebSize WebLayerTreeViewImpl::deviceViewportSize() const {
+  return layer_tree_host_->device_viewport_size();
+}
+
+void WebLayerTreeViewImpl::setDeviceScaleFactor(float device_scale_factor) {
+  layer_tree_host_->SetDeviceScaleFactor(device_scale_factor);
+}
+
+float WebLayerTreeViewImpl::deviceScaleFactor() const {
+  return layer_tree_host_->device_scale_factor();
+}
+
+void WebLayerTreeViewImpl::setBackgroundColor(blink::WebColor color) {
+  layer_tree_host_->set_background_color(color);
+}
+
+void WebLayerTreeViewImpl::setHasTransparentBackground(
+    bool has_transparent_background) {
+  layer_tree_host_->set_has_transparent_background(has_transparent_background);
+}
+
+void WebLayerTreeViewImpl::setOverhangBitmap(const SkBitmap& bitmap) {
+  layer_tree_host_->SetOverhangBitmap(bitmap);
+}
+
+void WebLayerTreeViewImpl::setVisible(bool visible) {
+  layer_tree_host_->SetVisible(visible);
+}
+
+void WebLayerTreeViewImpl::setPageScaleFactorAndLimits(float page_scale_factor,
+                                                       float minimum,
+                                                       float maximum) {
+  layer_tree_host_->SetPageScaleFactorAndLimits(
+      page_scale_factor, minimum, maximum);
+}
+
+void WebLayerTreeViewImpl::registerForAnimations(blink::WebLayer* layer) {
+  cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
+  cc_layer->layer_animation_controller()->SetAnimationRegistrar(
+      layer_tree_host_->animation_registrar());
+}
+
+void WebLayerTreeViewImpl::registerViewportLayers(
+    const blink::WebLayer* pageScaleLayer,
+    const blink::WebLayer* innerViewportScrollLayer,
+    const blink::WebLayer* outerViewportScrollLayer) {
+  layer_tree_host_->RegisterViewportLayers(
+      static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
+      static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
+          ->layer(),
+      // The outer viewport layer will only exist when using pinch virtual
+      // viewports.
+      outerViewportScrollLayer ? static_cast<const cc_blink::WebLayerImpl*>(
+                                     outerViewportScrollLayer)->layer()
+                               : NULL);
+}
+
+void WebLayerTreeViewImpl::clearViewportLayers() {
+  layer_tree_host_->RegisterViewportLayers(scoped_refptr<cc::Layer>(),
+                                           scoped_refptr<cc::Layer>(),
+                                           scoped_refptr<cc::Layer>());
+}
+
+void WebLayerTreeViewImpl::startPageScaleAnimation(
+    const blink::WebPoint& destination,
+    bool use_anchor,
+    float new_page_scale,
+    double duration_sec) {
+  base::TimeDelta duration = base::TimeDelta::FromMicroseconds(
+      duration_sec * base::Time::kMicrosecondsPerSecond);
+  layer_tree_host_->StartPageScaleAnimation(
+      gfx::Vector2d(destination.x, destination.y),
+      use_anchor,
+      new_page_scale,
+      duration);
+}
+
+void WebLayerTreeViewImpl::setNeedsAnimate() {
+  layer_tree_host_->SetNeedsAnimate();
+}
+
+bool WebLayerTreeViewImpl::commitRequested() const {
+  return layer_tree_host_->CommitRequested();
+}
+
+void WebLayerTreeViewImpl::finishAllRendering() {
+  layer_tree_host_->FinishAllRendering();
+}
+
+void WebLayerTreeViewImpl::OnSurfaceConnectionCreated(SurfacePtr surface,
+                                                      uint32_t id_namespace) {
+  CommandBufferPtr cb;
+  gpu_service_->CreateOffscreenGLES2Context(Get(&cb));
+  scoped_refptr<cc::ContextProvider> context_provider(
+      new ContextProviderMojo(cb.PassMessagePipe()));
+  output_surface_.reset(new OutputSurfaceMojo(
+      this, context_provider, surface.Pass(), id_namespace));
+  layer_tree_host_->SetLayerTreeHostClientReady();
+}
+
+void WebLayerTreeViewImpl::DidCreateSurface(cc::SurfaceId id) {
+  main_thread_compositor_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&WebLayerTreeViewImpl::DidCreateSurfaceOnMainThread,
+                 main_thread_bound_weak_ptr_,
+                 id));
+}
+
+void WebLayerTreeViewImpl::DidCreateSurfaceOnMainThread(cc::SurfaceId id) {
+  view_->SetSurfaceId(SurfaceId::From(id));
+}
+
+}  // namespace mojo