1/* 2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org) 3 * (C) 2000 Antti Koivisto (koivisto@kde.org) 4 * (C) 2000 Dirk Mueller (mueller@kde.org) 5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24#include "config.h" 25#include "StyleGeneratedImage.h" 26 27#include "CSSImageGeneratorValue.h" 28#include "RenderElement.h" 29#include "StyleResolver.h" 30 31namespace WebCore { 32 33StyleGeneratedImage::StyleGeneratedImage(PassRef<CSSImageGeneratorValue> value) 34 : m_imageGeneratorValue(WTF::move(value)) 35 , m_fixedSize(m_imageGeneratorValue->isFixedSize()) 36{ 37 m_isGeneratedImage = true; 38} 39 40PassRefPtr<CSSValue> StyleGeneratedImage::cssValue() const 41{ 42 return &const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get()); 43} 44 45FloatSize StyleGeneratedImage::imageSize(const RenderElement* renderer, float multiplier) const 46{ 47 if (m_fixedSize) { 48 FloatSize fixedSize = const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get()).fixedSize(renderer); 49 if (multiplier == 1.0f) 50 return fixedSize; 51 52 float width = fixedSize.width() * multiplier; 53 float height = fixedSize.height() * multiplier; 54 55 // Don't let images that have a width/height >= 1 shrink below 1 device pixel when zoomed. 56 float deviceScaleFactor = renderer ? renderer->document().deviceScaleFactor() : 1; 57 if (fixedSize.width() > 0) 58 width = std::max<float>(1 / deviceScaleFactor, width); 59 60 if (fixedSize.height() > 0) 61 height = std::max<float>(1 / deviceScaleFactor, height); 62 63 return FloatSize(width, height); 64 } 65 66 return m_containerSize; 67} 68 69void StyleGeneratedImage::computeIntrinsicDimensions(const RenderElement* renderer, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) 70{ 71 // At a zoom level of 1 the image is guaranteed to have a device pixel size. 72 FloatSize size = flooredForPainting(LayoutSize(imageSize(renderer, 1)), renderer ? renderer->document().deviceScaleFactor() : 1); 73 intrinsicWidth = Length(size.width(), Fixed); 74 intrinsicHeight = Length(size.height(), Fixed); 75 intrinsicRatio = size; 76} 77 78void StyleGeneratedImage::addClient(RenderElement* renderer) 79{ 80 m_imageGeneratorValue->addClient(renderer); 81} 82 83void StyleGeneratedImage::removeClient(RenderElement* renderer) 84{ 85 m_imageGeneratorValue->removeClient(renderer); 86} 87 88PassRefPtr<Image> StyleGeneratedImage::image(RenderElement* renderer, const FloatSize& size) const 89{ 90 return const_cast<CSSImageGeneratorValue&>(m_imageGeneratorValue.get()).image(renderer, size); 91} 92 93bool StyleGeneratedImage::knownToBeOpaque(const RenderElement* renderer) const 94{ 95 return m_imageGeneratorValue->knownToBeOpaque(renderer); 96} 97 98} 99