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,
  15                                              int id,
  16                                              bool is_mask)
  17     : PictureLayerImpl(tree_impl, id, is_mask) {
  18 }
  19
  20 PictureImageLayerImpl::~PictureImageLayerImpl() {
  21 }
  22
  23 const char* PictureImageLayerImpl::LayerTypeAsString() const {
  24   return "cc::PictureImageLayerImpl";
  25 }
  26
  27 scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
  28     LayerTreeImpl* tree_impl) {
  29   return PictureImageLayerImpl::Create(tree_impl, id(), is_mask_);
  30 }
  31
  32 void PictureImageLayerImpl::GetDebugBorderProperties(
  33     SkColor* color, float* width) const {
  34   *color = DebugColors::ImageLayerBorderColor();
  35   *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
  36 }
  37
  38 bool PictureImageLayerImpl::ShouldAdjustRasterScale() const {
  39   return false;
  40 }
  41
  42 void PictureImageLayerImpl::RecalculateRasterScales() {
  43   // Don't scale images during rastering to ensure image quality, save memory
  44   // and avoid frequent re-rastering on change of scale.
  45   raster_page_scale_ = 1.f;
  46   raster_device_scale_ = 1.f;
  47   raster_source_scale_ = std::max(1.f, MinimumContentsScale());
  48   raster_contents_scale_ = raster_source_scale_;
  49   // We don't need low res tiles.
  50   low_res_raster_contents_scale_ = raster_contents_scale_;
  51 }
  52
  53 void PictureImageLayerImpl::UpdateIdealScales() {
  54   ideal_contents_scale_ = 1.f;
  55   ideal_page_scale_ = 1.f;
  56   ideal_device_scale_ = 1.f;
  57   ideal_source_scale_ = 1.f;
  58 }
  59
  60 }  // namespace cc