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 gl_pipe)
  18     : gl_pipe_(gl_pipe.Pass()), compositor_thread_("compositor") {
  19   DCHECK(gl_pipe_.is_valid());
  20   bool started = compositor_thread_.Start();
  21   DCHECK(started);
  22
  23   cc::LayerTreeSettings settings;
  24   tree_ = cc::LayerTreeHost::CreateThreaded(
  25       this, NULL, settings, compositor_thread_.message_loop_proxy());
  26   SetupScene();
  27 }
  28
  29 CompositorHost::~CompositorHost() {}
  30
  31 void CompositorHost::SetSize(gfx::Size viewport_size) {
  32   tree_->SetViewportSize(viewport_size);
  33   tree_->SetLayerTreeHostClientReady();
  34   tree_->InitializeOutputSurfaceIfNeeded();
  35 }
  36
  37 void CompositorHost::SetupScene() {
  38   scoped_refptr<cc::Layer> root_layer = cc::SolidColorLayer::Create();
  39   root_layer->SetBounds(gfx::Size(500, 500));
  40   root_layer->SetBackgroundColor(SK_ColorBLUE);
  41   root_layer->SetIsDrawable(true);
  42   tree_->SetRootLayer(root_layer);
  43
  44   child_layer_ = cc::SolidColorLayer::Create();
  45   child_layer_->SetBounds(gfx::Size(100, 100));
  46   child_layer_->SetBackgroundColor(SK_ColorGREEN);
  47   child_layer_->SetIsDrawable(true);
  48   gfx::Transform child_transform;
  49   child_transform.Translate(200, 200);
  50   child_layer_->SetTransform(child_transform);
  51   root_layer->AddChild(child_layer_);
  52 }
  53
  54 void CompositorHost::WillBeginMainFrame(int frame_id) {}
  55 void CompositorHost::DidBeginMainFrame() {}
  56
  57 void CompositorHost::Animate(base::TimeTicks frame_begin_time) {
  58   // TODO(jamesr): Should use cc's animation system.
  59   static const double kDegreesPerSecond = 70.0;
  60   double time_in_seconds = (frame_begin_time - base::TimeTicks()).InSecondsF();
  61   double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
  62   gfx::Transform child_transform;
  63   child_transform.Translate(200, 200);
  64   child_transform.Rotate(child_rotation_degrees);
  65   child_layer_->SetTransform(child_transform);
  66   tree_->SetNeedsAnimate();
  67 }
  68
  69 void CompositorHost::Layout() {}
  70 void CompositorHost::ApplyScrollAndScale(const gfx::Vector2d& scroll_delta,
  71                                          float page_scale) {}
  72
  73 scoped_ptr<cc::OutputSurface> CompositorHost::CreateOutputSurface(
  74     bool fallback) {
  75   return make_scoped_ptr(
  76       new cc::OutputSurface(new ContextProviderMojo(gl_pipe_.Pass())));
  77 }
  78
  79 void CompositorHost::DidInitializeOutputSurface() {
  80 }
  81
  82 void CompositorHost::WillCommit() {}
  83 void CompositorHost::DidCommit() {}
  84 void CompositorHost::DidCommitAndDrawFrame() {}
  85 void CompositorHost::DidCompleteSwapBuffers() {}
  86
  87 }  // namespace examples
  88 }  // namespace mojo