File indexing completed on 2024-05-12 11:51:56

 /*
     Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005 Rob Buis <buis@kde.org>
                   2005 Eric Seidel <eric@webkit.org>
 
     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
     aint 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.
 */
 
 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
 #include "SVGResourceFilter.h"
 
 #include "SVGRenderTreeAsText.h"
 
 namespace WebCore
 {
 
 SVGResourceFilter::SVGResourceFilter()
     : m_platformData(createPlatformData())
     , m_filterBBoxMode(false)
     , m_effectBBoxMode(false)
     , m_xBBoxMode(false)
     , m_yBBoxMode(false)
 {
 }
 
 void SVGResourceFilter::clearEffects()
 {
     m_effects.clear();
 }
 
 void SVGResourceFilter::addFilterEffect(SVGFilterEffect *effect)
 {
     ASSERT(effect);
 
     if (effect) {
         ASSERT(effect->filter() == this);
         m_effects.append(effect);
     }
 }
 
 FloatRect SVGResourceFilter::filterBBoxForItemBBox(const FloatRect &itemBBox) const
 {
     FloatRect filterBBox = filterRect();
 
     float xOffset = 0.0f;
     float yOffset = 0.0f;
 
     if (!effectBoundingBoxMode()) {
         xOffset = itemBBox.x();
         yOffset = itemBBox.y();
     }
 
     if (filterBoundingBoxMode()) {
         filterBBox = FloatRect(xOffset + filterBBox.x() * itemBBox.width(),
                                yOffset + filterBBox.y() * itemBBox.height(),
                                filterBBox.width() * itemBBox.width(),
                                filterBBox.height() * itemBBox.height());
     } else {
         if (xBoundingBoxMode()) {
             filterBBox.setX(xOffset + filterBBox.x());
         }
 
         if (yBoundingBoxMode()) {
             filterBBox.setY(yOffset + filterBBox.y());
         }
     }
 
     return filterBBox;
 }
 
 TextStream &SVGResourceFilter::externalRepresentation(TextStream &ts) const
 {
     ts << "[type=FILTER] ";
 
     FloatRect bbox = filterRect();
     static FloatRect defaultFilterRect(0, 0, 1, 1);
 
     if (!filterBoundingBoxMode() || bbox != defaultFilterRect) {
         ts << " [bounding box=";
         if (filterBoundingBoxMode()) {
             bbox.scale(100.f);
             ts << "at (" << bbox.x() << "%," <<  bbox.y() << "%) size " << bbox.width() << "%x" << bbox.height() << "%";
         } else {
             ts << filterRect();
         }
         ts << "]";
     }
 
     if (!filterBoundingBoxMode()) { // default is true
         ts << " [bounding box mode=" << filterBoundingBoxMode() << "]";
     }
     if (effectBoundingBoxMode()) { // default is false
         ts << " [effect bounding box mode=" << effectBoundingBoxMode() << "]";
     }
     if (m_effects.size() > 0) {
         ts << " [effects=" << m_effects << "]";
     }
 
     return ts;
 }
 
 SVGResourceFilter *getFilterById(Document *document, const AtomicString &id)
 {
     SVGResource *resource = getResourceById(document, id);
     if (resource && resource->isFilter()) {
         return static_cast<SVGResourceFilter *>(resource);
     }
 
     return 0;
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG)