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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "StyleGeneratedImage.h"
#include "CSSImageGeneratorValue.h"
#include "RenderElement.h"
#include "StyleResolver.h"
namespace WebCore {
StyleGeneratedImage::StyleGeneratedImage(PassRef<CSSImageGeneratorValue> value)
: m_imageGeneratorValue(WTF::move(value))
, m_fixedSize(m_imageGeneratorValue->isFixedSize())
{
m_isGeneratedImage = true;
}
PassRefPtr<CSSValue> StyleGeneratedImage::cssValue() const
{
return &const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get());
}
FloatSize StyleGeneratedImage::imageSize(const RenderElement* renderer, float multiplier) const
{
if (m_fixedSize) {
FloatSize fixedSize = const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get()).fixedSize(renderer);
if (multiplier == 1.0f)
return fixedSize;
float width = fixedSize.width() * multiplier;
float height = fixedSize.height() * multiplier;
// Don't let images that have a width/height >= 1 shrink below 1 device pixel when zoomed.
float deviceScaleFactor = renderer ? renderer->document().deviceScaleFactor() : 1;
if (fixedSize.width() > 0)
width = std::max<float>(1 / deviceScaleFactor, width);
if (fixedSize.height() > 0)
height = std::max<float>(1 / deviceScaleFactor, height);
return FloatSize(width, height);
}
return m_containerSize;
}
void StyleGeneratedImage::computeIntrinsicDimensions(const RenderElement* renderer, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio)
{
// At a zoom level of 1 the image is guaranteed to have a device pixel size.
FloatSize size = floorSizeToDevicePixels(LayoutSize(imageSize(renderer, 1)), renderer ? renderer->document().deviceScaleFactor() : 1);
intrinsicWidth = Length(size.width(), Fixed);
intrinsicHeight = Length(size.height(), Fixed);
intrinsicRatio = size;
}
void StyleGeneratedImage::addClient(RenderElement* renderer)
{
m_imageGeneratorValue->addClient(renderer);
}
void StyleGeneratedImage::removeClient(RenderElement* renderer)
{
m_imageGeneratorValue->removeClient(renderer);
}
PassRefPtr<Image> StyleGeneratedImage::image(RenderElement* renderer, const FloatSize& size) const
{
return const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get()).image(renderer, size);
}
bool StyleGeneratedImage::knownToBeOpaque(const RenderElement* renderer) const
{
return m_imageGeneratorValue->knownToBeOpaque(renderer);
}
}
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