blimp/client/compositor/test/dummy_layer_driver.cc

   1 // Copyright 2015 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 "blimp/client/compositor/test/dummy_layer_driver.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/task_runner.h"
  10 #include "base/thread_task_runner_handle.h"
  11 #include "cc/layers/layer.h"
  12 #include "cc/layers/solid_color_layer.h"
  13 #include "cc/trees/layer_tree_settings.h"
  14 #include "ui/gfx/geometry/size.h"
  15
  16 namespace blimp {
  17
  18 DummyLayerDriver::DummyLayerDriver()
  19     : layer_(cc::SolidColorLayer::Create(cc::LayerSettings())),
  20       animation_running_(false),
  21       weak_factory_(this) {
  22   layer_->SetIsDrawable(true);
  23   layer_->SetBackgroundColor(SK_ColorBLUE);
  24   layer_->SetBounds(gfx::Size(300, 300));
  25 }
  26
  27 DummyLayerDriver::~DummyLayerDriver() {}
  28
  29 void DummyLayerDriver::SetParentLayer(scoped_refptr<cc::Layer> layer) {
  30   // This will automatically remove layer_ from the previous layer.
  31   layer->AddChild(layer_);
  32
  33   // If we're not expecting another animation step, start one now.
  34   if (!animation_running_) {
  35     animation_running_ = true;
  36     StepAnimation();
  37   }
  38 }
  39
  40 void DummyLayerDriver::StepAnimation() {
  41   // Detached from the cc::LayerTreeHost. Stop doing work.
  42   if (!layer_->layer_tree_host()) {
  43     animation_running_ = false;
  44     return;
  45   }
  46
  47   // Fun with colors
  48   SkColor color = layer_->background_color();
  49   color = SkColorSetRGB((SkColorGetR(color) + 5) % 255,
  50                         (SkColorGetG(color) + 3) % 255,
  51                         (SkColorGetB(color) + 1) % 255);
  52   layer_->SetBackgroundColor(color);
  53
  54   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
  55       FROM_HERE,
  56       base::Bind(&DummyLayerDriver::StepAnimation, weak_factory_.GetWeakPtr()),
  57       base::TimeDelta::FromMilliseconds(16));
  58 }
  59
  60 }  // namespace blimp