cc/layers/picture_image_layer_impl.cc

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/layers/picture_image_layer_impl.h"

#include <algorithm>

#include "cc/debug/debug_colors.h"
#include "cc/trees/layer_tree_impl.h"

namespace cc {

PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* tree_impl,
                                             int id,
                                             bool is_mask)
    : PictureLayerImpl(tree_impl,
                       id,
                       is_mask,
                       new LayerImpl::SyncedScrollOffset) {
}

PictureImageLayerImpl::~PictureImageLayerImpl() {
}

const char* PictureImageLayerImpl::LayerTypeAsString() const {
  return "cc::PictureImageLayerImpl";
}

scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
    LayerTreeImpl* tree_impl) {
  return PictureImageLayerImpl::Create(tree_impl, id(), is_mask_);
}

void PictureImageLayerImpl::GetDebugBorderProperties(
    SkColor* color, float* width) const {
  *color = DebugColors::ImageLayerBorderColor();
  *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
}

bool PictureImageLayerImpl::ShouldAdjustRasterScale() const {
  return false;
}

void PictureImageLayerImpl::RecalculateRasterScales() {
  // Don't scale images during rastering to ensure image quality, save memory
  // and avoid frequent re-rastering on change of scale.
  raster_page_scale_ = 1.f;
  raster_device_scale_ = 1.f;
  raster_source_scale_ = std::max(1.f, MinimumContentsScale());
  raster_contents_scale_ = raster_source_scale_;
  // We don't need low res tiles.
  low_res_raster_contents_scale_ = raster_contents_scale_;
}

void PictureImageLayerImpl::UpdateIdealScales() {
  ideal_contents_scale_ = 1.f;
  ideal_page_scale_ = 1.f;
  ideal_device_scale_ = 1.f;
  ideal_source_scale_ = 1.f;
}

}  // namespace cc