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SVGFilterEffect.cpp

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00001 /*
00002     Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
00003                   2004, 2005 Rob Buis <buis@kde.org>
00004                   2005 Eric Seidel <eric@webkit.org>
00005 
00006     This library is free software; you can redistribute it and/or
00007     modify it under the terms of the GNU Library General Public
00008     License as published by the Free Software Foundation; either
00009     version 2 of the License, or (at your option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014     Library General Public License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public License
00017     aint with this library; see the file COPYING.LIB.  If not, write to
00018     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019     Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #include "config.h"
00023 
00024 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
00025 #include "SVGFilterEffect.h"
00026 
00027 #include "SVGRenderTreeAsText.h"
00028 #include "SVGResourceFilter.h"
00029 
00030 namespace WebCore {
00031 
00032 SVGFilterEffect::SVGFilterEffect(SVGResourceFilter* filter)
00033     : m_filter(filter)
00034     , m_xBBoxMode(false)
00035     , m_yBBoxMode(false)
00036     , m_widthBBoxMode(false)
00037     , m_heightBBoxMode(false)
00038 {
00039 }
00040 
00041 FloatRect SVGFilterEffect::primitiveBBoxForFilterBBox(const FloatRect& filterBBox, const FloatRect& itemBBox) const
00042 {
00043     FloatRect subRegionBBox = subRegion();
00044     FloatRect useBBox = filterBBox;
00045 
00046     ASSERT(m_filter);
00047     if (!m_filter)
00048         return FloatRect();
00049 
00050     if (m_filter->effectBoundingBoxMode()) {
00051         if (!m_filter->filterBoundingBoxMode())
00052             useBBox = itemBBox;
00053 
00054         subRegionBBox = FloatRect(useBBox.x() + subRegionBBox.x() * useBBox.width(),
00055                                   useBBox.y() + subRegionBBox.y() * useBBox.height(),
00056                                   subRegionBBox.width() * useBBox.width(),
00057                                   subRegionBBox.height() * useBBox.height());
00058     } else {
00059         if (xBoundingBoxMode())
00060             subRegionBBox.setX(useBBox.x() + subRegionBBox.x() * useBBox.width());
00061 
00062         if (yBoundingBoxMode())
00063             subRegionBBox.setY(useBBox.y() + subRegionBBox.y() * useBBox.height());
00064 
00065         if (widthBoundingBoxMode())
00066             subRegionBBox.setWidth(subRegionBBox.width() * useBBox.width());
00067 
00068         if (heightBoundingBoxMode())
00069             subRegionBBox.setHeight(subRegionBBox.height() * useBBox.height());
00070     }
00071 
00072     return subRegionBBox;
00073 }
00074 
00075 FloatRect SVGFilterEffect::subRegion() const
00076 {
00077     return m_subRegion;
00078 }
00079 
00080 void SVGFilterEffect::setSubRegion(const FloatRect& subRegion)
00081 {
00082     m_subRegion = subRegion;
00083 }
00084 
00085 String SVGFilterEffect::in() const
00086 {
00087     return m_in;
00088 }
00089 
00090 void SVGFilterEffect::setIn(const String& in)
00091 {
00092     m_in = in;
00093 }
00094 
00095 String SVGFilterEffect::result() const
00096 {
00097     return m_result;
00098 }
00099 
00100 void SVGFilterEffect::setResult(const String& result)
00101 {
00102     m_result = result;
00103 }
00104 
00105 SVGResourceFilter* SVGFilterEffect::filter() const
00106 {
00107     return m_filter;
00108 }
00109 
00110 void SVGFilterEffect::setFilter(SVGResourceFilter* filter)
00111 {
00112     m_filter = filter;
00113 }
00114 
00115 TextStream& SVGFilterEffect::externalRepresentation(TextStream& ts) const
00116 {
00117     if (!in().isEmpty())
00118         ts << "[in=\"" << in() << "\"]";
00119     if (!result().isEmpty())
00120         ts << " [result=\"" << result() << "\"]";
00121     if (!subRegion().isEmpty())
00122         ts << " [subregion=\"" << subRegion() << "\"]";
00123     return ts;
00124 }
00125 
00126 TextStream& operator<<(TextStream& ts, const SVGFilterEffect& e)
00127 {
00128     return e.externalRepresentation(ts);
00129 }
00130 
00131 } // namespace WebCore
00132 
00133 #endif // ENABLE(SVG) && ENABLE(SVG_FILTERS)

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