cc/contents_scaling_layer.cc

// Copyright 2012 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/contents_scaling_layer.h"
#include "ui/gfx/size_conversions.h"

namespace cc {

gfx::Size ContentsScalingLayer::computeContentBoundsForScale(float scaleX, float scaleY) const {
  return gfx::ToCeiledSize(gfx::ScaleSize(bounds(), scaleX, scaleY));
}

ContentsScalingLayer::ContentsScalingLayer()
    : m_contentsScale(1.0) {
}

ContentsScalingLayer::~ContentsScalingLayer() {
}

gfx::Size ContentsScalingLayer::contentBounds() const {
  return computeContentBoundsForScale(contentsScaleX(), contentsScaleY());
}

float ContentsScalingLayer::contentsScaleX() const {
  return m_contentsScale;
}

float ContentsScalingLayer::contentsScaleY() const {
  return m_contentsScale;
}

void ContentsScalingLayer::setContentsScale(float contentsScale) {
  if (m_contentsScale == contentsScale)
    return;
  m_contentsScale = contentsScale;
  setNeedsDisplay();
}

}  // namespace cc