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