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/begin_frame_args.h"
  10 #include "cc/output/context_provider.h"
  11 #include "cc/output/output_surface.h"
  12 #include "cc/trees/layer_tree_host.h"
  13 #include "mojo/cc/context_provider_mojo.h"
  14
  15 namespace mojo {
  16 namespace examples {
  17
  18 CompositorHost::CompositorHost(ScopedMessagePipeHandle command_buffer_handle)
  19     : command_buffer_handle_(command_buffer_handle.Pass()),
  20       compositor_thread_("compositor") {
  21   DCHECK(command_buffer_handle_.is_valid());
  22   bool started = compositor_thread_.Start();
  23   DCHECK(started);
  24
  25   cc::LayerTreeSettings settings;
  26   tree_ = cc::LayerTreeHost::CreateThreaded(
  27       this,
  28       NULL,
  29       settings,
  30       base::MessageLoopProxy::current(),
  31       compositor_thread_.message_loop_proxy());
  32   SetupScene();
  33 }
  34
  35 CompositorHost::~CompositorHost() {}
  36
  37 void CompositorHost::SetSize(const gfx::Size& viewport_size) {
  38   tree_->SetViewportSize(viewport_size);
  39   tree_->SetLayerTreeHostClientReady();
  40 }
  41
  42 void CompositorHost::SetupScene() {
  43   scoped_refptr<cc::Layer> root_layer = cc::SolidColorLayer::Create();
  44   root_layer->SetBounds(gfx::Size(500, 500));
  45   root_layer->SetBackgroundColor(SK_ColorBLUE);
  46   root_layer->SetIsDrawable(true);
  47   tree_->SetRootLayer(root_layer);
  48
  49   child_layer_ = cc::SolidColorLayer::Create();
  50   child_layer_->SetBounds(gfx::Size(100, 100));
  51   child_layer_->SetBackgroundColor(SK_ColorGREEN);
  52   child_layer_->SetIsDrawable(true);
  53   gfx::Transform child_transform;
  54   child_transform.Translate(200, 200);
  55   child_layer_->SetTransform(child_transform);
  56   root_layer->AddChild(child_layer_);
  57 }
  58
  59 void CompositorHost::WillBeginMainFrame(int frame_id) {}
  60 void CompositorHost::DidBeginMainFrame() {}
  61
  62 void CompositorHost::BeginMainFrame(const cc::BeginFrameArgs& args) {
  63   // TODO(jamesr): Should use cc's animation system.
  64   static const double kDegreesPerSecond = 70.0;
  65   double time_in_seconds = (args.frame_time - base::TimeTicks()).InSecondsF();
  66   double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
  67   gfx::Transform child_transform;
  68   child_transform.Translate(200, 200);
  69   child_transform.Rotate(child_rotation_degrees);
  70   child_layer_->SetTransform(child_transform);
  71   tree_->SetNeedsAnimate();
  72 }
  73
  74 void CompositorHost::Layout() {}
  75 void CompositorHost::ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
  76                                          float page_scale,
  77                                          float top_controls_delta) {}
  78
  79 void CompositorHost::RequestNewOutputSurface(bool fallback) {
  80   tree_->SetOutputSurface(make_scoped_ptr(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