cc/layers/picture_image_layer_impl.cc

   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 "cc/layers/picture_image_layer_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "cc/debug/debug_colors.h"
  10 #include "cc/trees/layer_tree_impl.h"
  11
  12 namespace cc {
  13
  14 PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* tree_impl, int id)
  15     : PictureLayerImpl(tree_impl, id) {
  16 }
  17
  18 PictureImageLayerImpl::~PictureImageLayerImpl() {
  19 }
  20
  21 const char* PictureImageLayerImpl::LayerTypeAsString() const {
  22   return "cc::PictureImageLayerImpl";
  23 }
  24
  25 scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
  26     LayerTreeImpl* tree_impl) {
  27   return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  28 }
  29
  30 void PictureImageLayerImpl::GetDebugBorderProperties(
  31     SkColor* color, float* width) const {
  32   *color = DebugColors::ImageLayerBorderColor();
  33   *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
  34 }
  35
  36 bool PictureImageLayerImpl::ShouldAdjustRasterScale() const {
  37   return false;
  38 }
  39
  40 void PictureImageLayerImpl::RecalculateRasterScales() {
  41   // Don't scale images during rastering to ensure image quality, save memory
  42   // and avoid frequent re-rastering on change of scale.
  43   raster_page_scale_ = 1.f;
  44   raster_device_scale_ = 1.f;
  45   raster_source_scale_ = std::max(1.f, MinimumContentsScale());
  46   raster_contents_scale_ = raster_source_scale_;
  47   // We don't need low res tiles.
  48   low_res_raster_contents_scale_ = raster_contents_scale_;
  49 }
  50
  51 void PictureImageLayerImpl::UpdateIdealScales() {
  52   ideal_contents_scale_ = 1.f;
  53   ideal_page_scale_ = 1.f;
  54   ideal_device_scale_ = 1.f;
  55   ideal_source_scale_ = 1.f;
  56 }
  57
  58 }  // namespace cc