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 "ash/wm/boot_splash_screen_chromeos.h"
6
7#include "third_party/skia/include/core/SkBitmap.h"
8#include "ui/aura/window.h"
9#include "ui/aura/window_tree_host.h"
10#include "ui/base/x/x11_util.h"
11#include "ui/compositor/layer.h"
12#include "ui/compositor/layer_type.h"
13#include "ui/compositor/scoped_layer_animation_settings.h"
14#include "ui/gfx/canvas.h"
15
16namespace ash {
17
18// ui::LayerDelegate that copies the aura host window's content to a ui::Layer.
19class BootSplashScreen::CopyHostContentLayerDelegate
20    : public ui::LayerDelegate {
21 public:
22  explicit CopyHostContentLayerDelegate(aura::WindowTreeHost* host)
23      : host_(host) {
24  }
25
26  virtual ~CopyHostContentLayerDelegate() {}
27
28  // ui::LayerDelegate overrides:
29  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
30    // It'd be safer to copy the area to a canvas in the constructor and then
31    // copy from that canvas to this one here, but this appears to work (i.e. we
32    // only call this before we draw our first frame) and it saves us an extra
33    // copy.
34    // TODO(derat): Instead of copying the data, use GLX_EXT_texture_from_pixmap
35    // to create a zero-copy texture (when possible):
36    // https://codereview.chromium.org/10543125
37#if defined(USE_X11)
38    ui::CopyAreaToCanvas(host_->GetAcceleratedWidget(),
39        host_->GetBounds(), gfx::Point(), canvas);
40#else
41    // TODO(spang): Figure out what to do here.
42    NOTIMPLEMENTED();
43#endif
44  }
45
46  virtual void OnDelegatedFrameDamage(
47      const gfx::Rect& damage_rect_in_dip) OVERRIDE {}
48
49  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
50
51  virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE {
52    return base::Closure();
53  }
54
55 private:
56  aura::WindowTreeHost* host_;  // not owned
57
58  DISALLOW_COPY_AND_ASSIGN(CopyHostContentLayerDelegate);
59};
60
61BootSplashScreen::BootSplashScreen(aura::WindowTreeHost* host)
62    : layer_delegate_(new CopyHostContentLayerDelegate(host)),
63      layer_(new ui::Layer(ui::LAYER_TEXTURED)) {
64  layer_->set_delegate(layer_delegate_.get());
65
66  ui::Layer* root_layer = host->window()->layer();
67  layer_->SetBounds(gfx::Rect(host->window()->bounds().size()));
68  root_layer->Add(layer_.get());
69  root_layer->StackAtTop(layer_.get());
70}
71
72BootSplashScreen::~BootSplashScreen() {
73}
74
75void BootSplashScreen::StartHideAnimation(base::TimeDelta duration) {
76  ui::ScopedLayerAnimationSettings settings(layer_->GetAnimator());
77  settings.SetTransitionDuration(duration);
78  settings.SetPreemptionStrategy(ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
79  layer_->SetOpacity(0.0f);
80}
81
82}  // namespace ash
83