src/mojo/examples/compositor_app/compositor_host.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/examples/compositor_app/compositor_host.h"
   6
   7 #include "cc/layers/layer.h"
   8 #include "cc/layers/solid_color_layer.h"
   9 #include "cc/output/context_provider.h"
  10 #include "cc/output/output_surface.h"
  11 #include "cc/trees/layer_tree_host.h"
  12 #include "mojo/cc/context_provider_mojo.h"
  13
  14 namespace mojo {
  15 namespace examples {
  16
  17 CompositorHost::CompositorHost(ScopedMessagePipeHandle command_buffer_handle)
  18     : command_buffer_handle_(command_buffer_handle.Pass()),
  19       compositor_thread_("compositor") {
  20   DCHECK(command_buffer_handle_.is_valid());
  21   bool started = compositor_thread_.Start();
  22   DCHECK(started);
  23
  24   cc::LayerTreeSettings settings;
  25   tree_ = cc::LayerTreeHost::CreateThreaded(
  26       this,
  27       NULL,
  28       settings,
  29       base::MessageLoopProxy::current(),
  30       compositor_thread_.message_loop_proxy());
  31   SetupScene();
  32 }
  33
  34 CompositorHost::~CompositorHost() {}
  35
  36 void CompositorHost::SetSize(const gfx::Size& viewport_size) {
  37   tree_->SetViewportSize(viewport_size);
  38   tree_->SetLayerTreeHostClientReady();
  39 }
  40
  41 void CompositorHost::SetupScene() {
  42   scoped_refptr<cc::Layer> root_layer = cc::SolidColorLayer::Create();
  43   root_layer->SetBounds(gfx::Size(500, 500));
  44   root_layer->SetBackgroundColor(SK_ColorBLUE);
  45   root_layer->SetIsDrawable(true);
  46   tree_->SetRootLayer(root_layer);
  47
  48   child_layer_ = cc::SolidColorLayer::Create();
  49   child_layer_->SetBounds(gfx::Size(100, 100));
  50   child_layer_->SetBackgroundColor(SK_ColorGREEN);
  51   child_layer_->SetIsDrawable(true);
  52   gfx::Transform child_transform;
  53   child_transform.Translate(200, 200);
  54   child_layer_->SetTransform(child_transform);
  55   root_layer->AddChild(child_layer_);
  56 }
  57
  58 void CompositorHost::WillBeginMainFrame(int frame_id) {}
  59 void CompositorHost::DidBeginMainFrame() {}
  60
  61 void CompositorHost::Animate(base::TimeTicks frame_begin_time) {
  62   // TODO(jamesr): Should use cc's animation system.
  63   static const double kDegreesPerSecond = 70.0;
  64   double time_in_seconds = (frame_begin_time - base::TimeTicks()).InSecondsF();
  65   double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
  66   gfx::Transform child_transform;
  67   child_transform.Translate(200, 200);
  68   child_transform.Rotate(child_rotation_degrees);
  69   child_layer_->SetTransform(child_transform);
  70   tree_->SetNeedsAnimate();
  71 }
  72
  73 void CompositorHost::Layout() {}
  74 void CompositorHost::ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
  75                                          float page_scale) {}
  76
  77 scoped_ptr<cc::OutputSurface> CompositorHost::CreateOutputSurface(
  78     bool fallback) {
  79   return make_scoped_ptr(
  80       new cc::OutputSurface(
  81           new ContextProviderMojo(command_buffer_handle_.Pass())));
  82 }
  83
  84 void CompositorHost::DidInitializeOutputSurface() {
  85 }
  86
  87 void CompositorHost::WillCommit() {}
  88 void CompositorHost::DidCommit() {}
  89 void CompositorHost::DidCommitAndDrawFrame() {}
  90 void CompositorHost::DidCompleteSwapBuffers() {}
  91
  92 }  // namespace examples
  93 }  // namespace mojo