1/* 2 * Copyright (C) 2010 University of Szeged 3 * Copyright (C) 2010 Zoltan Herczeg 4 * Copyright (C) 2011 Renata Hodovan (reni@webkit.org) 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY UNIVERSITY OF SZEGED ``AS IS'' AND ANY 16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UNIVERSITY OF SZEGED OR 19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#include "config.h" 29 30#if ENABLE(SVG) && ENABLE(FILTERS) 31#include "RenderSVGResourceFilterPrimitive.h" 32 33#include "RenderSVGResource.h" 34#include "SVGFEImage.h" 35#include "SVGFilter.h" 36#include "SVGNames.h" 37 38namespace WebCore { 39 40 41void RenderSVGResourceFilterPrimitive::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 42{ 43 RenderSVGHiddenContainer::styleDidChange(diff, oldStyle); 44 45 RenderObject* filter = parent(); 46 if (!filter) 47 return; 48 ASSERT(filter->isSVGResourceFilter()); 49 50 if (diff == StyleDifferenceEqual || !oldStyle) 51 return; 52 53 const SVGRenderStyle* newStyle = this->style()->svgStyle(); 54 if (node()->hasTagName(SVGNames::feFloodTag)) { 55 if (newStyle->floodColor() != oldStyle->svgStyle()->floodColor()) 56 static_cast<RenderSVGResourceFilter*>(filter)->primitiveAttributeChanged(this, SVGNames::flood_colorAttr); 57 if (newStyle->floodOpacity() != oldStyle->svgStyle()->floodOpacity()) 58 static_cast<RenderSVGResourceFilter*>(filter)->primitiveAttributeChanged(this, SVGNames::flood_opacityAttr); 59 } else if (node()->hasTagName(SVGNames::feDiffuseLightingTag) || node()->hasTagName(SVGNames::feSpecularLightingTag)) { 60 if (newStyle->lightingColor() != oldStyle->svgStyle()->lightingColor()) 61 static_cast<RenderSVGResourceFilter*>(filter)->primitiveAttributeChanged(this, SVGNames::lighting_colorAttr); 62 } 63} 64 65FloatRect RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(FilterEffect* effect) 66{ 67 FloatRect uniteRect; 68 FloatRect subregionBoundingBox = effect->effectBoundaries(); 69 FloatRect subregion = subregionBoundingBox; 70 SVGFilter* filter = static_cast<SVGFilter*>(effect->filter()); 71 ASSERT(filter); 72 73 if (effect->filterEffectType() != FilterEffectTypeTile) { 74 // FETurbulence, FEImage and FEFlood don't have input effects, take the filter region as unite rect. 75 if (unsigned numberOfInputEffects = effect->inputEffects().size()) { 76 for (unsigned i = 0; i < numberOfInputEffects; ++i) 77 uniteRect.unite(determineFilterPrimitiveSubregion(effect->inputEffect(i))); 78 } else 79 uniteRect = filter->filterRegionInUserSpace(); 80 } else { 81 determineFilterPrimitiveSubregion(effect->inputEffect(0)); 82 uniteRect = filter->filterRegionInUserSpace(); 83 } 84 85 if (filter->effectBoundingBoxMode()) { 86 subregion = uniteRect; 87 // Avoid the calling of a virtual method several times. 88 FloatRect targetBoundingBox = filter->targetBoundingBox(); 89 90 if (effect->hasX()) 91 subregion.setX(targetBoundingBox.x() + subregionBoundingBox.x() * targetBoundingBox.width()); 92 93 if (effect->hasY()) 94 subregion.setY(targetBoundingBox.y() + subregionBoundingBox.y() * targetBoundingBox.height()); 95 96 if (effect->hasWidth()) 97 subregion.setWidth(subregionBoundingBox.width() * targetBoundingBox.width()); 98 99 if (effect->hasHeight()) 100 subregion.setHeight(subregionBoundingBox.height() * targetBoundingBox.height()); 101 } else { 102 if (!effect->hasX()) 103 subregion.setX(uniteRect.x()); 104 105 if (!effect->hasY()) 106 subregion.setY(uniteRect.y()); 107 108 if (!effect->hasWidth()) 109 subregion.setWidth(uniteRect.width()); 110 111 if (!effect->hasHeight()) 112 subregion.setHeight(uniteRect.height()); 113 } 114 115 effect->setFilterPrimitiveSubregion(subregion); 116 117 FloatRect absoluteSubregion = filter->mapLocalRectToAbsoluteRect(subregion); 118 FloatSize filterResolution = filter->filterResolution(); 119 absoluteSubregion.scale(filterResolution.width(), filterResolution.height()); 120 121 // FEImage needs the unclipped subregion in absolute coordinates to determine the correct 122 // destination rect in combination with preserveAspectRatio. 123 if (effect->filterEffectType() == FilterEffectTypeImage) 124 static_cast<FEImage*>(effect)->setAbsoluteSubregion(absoluteSubregion); 125 126 // Clip every filter effect to the filter region. 127 FloatRect absoluteScaledFilterRegion = filter->filterRegion(); 128 absoluteScaledFilterRegion.scale(filterResolution.width(), filterResolution.height()); 129 absoluteSubregion.intersect(absoluteScaledFilterRegion); 130 131 effect->setMaxEffectRect(absoluteSubregion); 132 return subregion; 133} 134 135} // namespace WebCore 136 137#endif // ENABLE(SVG) && ENABLE(FILTERS) 138