cc/heads_up_display_layer.cc

   1 // Copyright 2012 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 "cc/heads_up_display_layer.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "cc/heads_up_display_layer_impl.h"
   9 #include "cc/layer_tree_host.h"
  10
  11 namespace cc {
  12
  13 scoped_refptr<HeadsUpDisplayLayer> HeadsUpDisplayLayer::create()
  14 {
  15     return make_scoped_refptr(new HeadsUpDisplayLayer());
  16 }
  17
  18 HeadsUpDisplayLayer::HeadsUpDisplayLayer()
  19     : Layer()
  20     , m_hasFontAtlas(false)
  21 {
  22     setBounds(gfx::Size(256, 128));
  23 }
  24
  25 HeadsUpDisplayLayer::~HeadsUpDisplayLayer()
  26 {
  27 }
  28
  29 void HeadsUpDisplayLayer::update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats&)
  30 {
  31     const LayerTreeDebugState& debugState = layerTreeHost()->debugState();
  32     int maxTextureSize = layerTreeHost()->rendererCapabilities().maxTextureSize;
  33
  34     gfx::Size bounds;
  35     gfx::Transform matrix;
  36     matrix.MakeIdentity();
  37
  38     if (debugState.showPlatformLayerTree || debugState.showHudRects()) {
  39         int width = std::min(maxTextureSize, layerTreeHost()->layoutViewportSize().width());
  40         int height = std::min(maxTextureSize, layerTreeHost()->layoutViewportSize().height());
  41         bounds = gfx::Size(width, height);
  42     } else {
  43         bounds = gfx::Size(256, 128);
  44         matrix.Translate(layerTreeHost()->layoutViewportSize().width() - 256, 0);
  45     }
  46
  47     setBounds(bounds);
  48     setTransform(matrix);
  49 }
  50
  51 bool HeadsUpDisplayLayer::drawsContent() const
  52 {
  53     return true;
  54 }
  55
  56 void HeadsUpDisplayLayer::setFontAtlas(scoped_ptr<FontAtlas> fontAtlas)
  57 {
  58     m_fontAtlas = fontAtlas.Pass();
  59     m_hasFontAtlas = true;
  60 }
  61
  62 scoped_ptr<LayerImpl> HeadsUpDisplayLayer::createLayerImpl(LayerTreeHostImpl* hostImpl)
  63 {
  64     return HeadsUpDisplayLayerImpl::create(hostImpl, m_layerId).PassAs<LayerImpl>();
  65 }
  66
  67 void HeadsUpDisplayLayer::pushPropertiesTo(LayerImpl* layerImpl)
  68 {
  69     Layer::pushPropertiesTo(layerImpl);
  70
  71     if (!m_fontAtlas)
  72         return;
  73
  74     HeadsUpDisplayLayerImpl* hudLayerImpl = static_cast<HeadsUpDisplayLayerImpl*>(layerImpl);
  75     hudLayerImpl->setFontAtlas(m_fontAtlas.Pass());
  76 }
  77
  78 }  // namespace cc