chrome/browser/android/compositor/layer/thumbnail_layer.cc

   1 // Copyright 2014 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 "chrome/browser/android/compositor/layer/thumbnail_layer.h"
   6
   7 #include "cc/layers/ui_resource_layer.h"
   8 #include "chrome/browser/android/thumbnail/thumbnail.h"
   9 #include "content/public/browser/android/compositor.h"
  10 #include "ui/gfx/geometry/size_conversions.h"
  11
  12 namespace chrome {
  13 namespace android {
  14
  15 // static
  16 scoped_refptr<ThumbnailLayer> ThumbnailLayer::Create() {
  17   return make_scoped_refptr(new ThumbnailLayer());
  18 }
  19
  20 void ThumbnailLayer::SetThumbnail(Thumbnail* thumbnail) {
  21   layer_->SetUIResourceId(thumbnail->ui_resource_id());
  22   UpdateSizes(thumbnail->scaled_content_size(), thumbnail->scaled_data_size());
  23 }
  24
  25 void ThumbnailLayer::Clip(const gfx::Rect& clipping) {
  26   last_clipping_ = clipping;
  27   gfx::Size clipped_content =
  28       gfx::ToCeiledSize(gfx::Size(content_size_.width() - clipping.x(),
  29                                   content_size_.height() - clipping.y()));
  30   clipped_content.SetToMin(clipping.size());
  31   layer_->SetBounds(clipped_content);
  32
  33   layer_->SetUV(
  34       gfx::PointF(clipping.x() / resource_size_.width(),
  35                   clipping.y() / resource_size_.height()),
  36       gfx::PointF(
  37           (clipping.x() + clipped_content.width()) / resource_size_.width(),
  38           (clipping.y() + clipped_content.height()) / resource_size_.height()));
  39 }
  40
  41 void ThumbnailLayer::AddSelfToParentOrReplaceAt(scoped_refptr<cc::Layer> parent,
  42                                                 size_t index) {
  43   if (index >= parent->children().size())
  44     parent->AddChild(layer_);
  45   else if (parent->child_at(index)->id() != layer_->id())
  46     parent->ReplaceChild(parent->child_at(index), layer_);
  47 }
  48
  49 scoped_refptr<cc::Layer> ThumbnailLayer::layer() {
  50   return layer_;
  51 }
  52
  53 ThumbnailLayer::ThumbnailLayer()
  54     : layer_(
  55           cc::UIResourceLayer::Create(content::Compositor::LayerSettings())) {
  56   layer_->SetIsDrawable(true);
  57 }
  58
  59 ThumbnailLayer::~ThumbnailLayer() {
  60 }
  61
  62 void ThumbnailLayer::UpdateSizes(const gfx::SizeF& content_size,
  63                                  const gfx::SizeF& resource_size) {
  64   if (content_size != content_size_ || resource_size != resource_size_) {
  65     content_size_ = content_size;
  66     resource_size_ = resource_size;
  67     Clip(last_clipping_);
  68   }
  69 }
  70
  71 }  // namespace android
  72 }  // namespace chrome