khtml/svg/graphics/SVGResourceFilter.cpp

   1 /*
   2     Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
   3                   2004, 2005 Rob Buis <buis@kde.org>
   4                   2005 Eric Seidel <eric@webkit.org>
   5
   6     This library is free software; you can redistribute it and/or
   7     modify it under the terms of the GNU Library General Public
   8     License as published by the Free Software Foundation; either
   9     version 2 of the License, or (at your option) any later version.
  10
  11     This library is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14     Library General Public License for more details.
  15
  16     You should have received a copy of the GNU Library General Public License
  17     aint with this library; see the file COPYING.LIB.  If not, write to
  18     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19     Boston, MA 02110-1301, USA.
  20 */
  21
  22 #include "config.h"
  23
  24 #if ENABLE(SVG) && ENABLE(SVG_FILTERS)
  25 #include "SVGResourceFilter.h"
  26
  27 #include "SVGRenderTreeAsText.h"
  28 #include "SVGFilterEffect.h"
  29
  30 namespace WebCore {
  31
  32 SVGResourceFilter::SVGResourceFilter()
  33     : m_platformData(createPlatformData())
  34     , m_filterBBoxMode(false)
  35     , m_effectBBoxMode(false)
  36     , m_xBBoxMode(false)
  37     , m_yBBoxMode(false)
  38 {
  39 }
  40
  41 void SVGResourceFilter::clearEffects()
  42 {
  43     m_effects.clear();
  44 }
  45
  46 void SVGResourceFilter::addFilterEffect(SVGFilterEffect* effect)
  47 {
  48     ASSERT(effect);
  49
  50     if (effect) {
  51         ASSERT(effect->filter() == this);
  52         m_effects.append(effect);
  53     }
  54 }
  55
  56 FloatRect SVGResourceFilter::filterBBoxForItemBBox(const FloatRect& itemBBox) const
  57 {
  58     FloatRect filterBBox = filterRect();
  59
  60     float xOffset = 0.0f;
  61     float yOffset = 0.0f;
  62
  63     if (!effectBoundingBoxMode()) {
  64         xOffset = itemBBox.x();
  65         yOffset = itemBBox.y();
  66     }
  67
  68     if (filterBoundingBoxMode()) {
  69         filterBBox = FloatRect(xOffset + filterBBox.x() * itemBBox.width(),
  70                                yOffset + filterBBox.y() * itemBBox.height(),
  71                                filterBBox.width() * itemBBox.width(),
  72                                filterBBox.height() * itemBBox.height());
  73     } else {
  74         if (xBoundingBoxMode())
  75             filterBBox.setX(xOffset + filterBBox.x());
  76
  77         if (yBoundingBoxMode())
  78             filterBBox.setY(yOffset + filterBBox.y());
  79     }
  80
  81     return filterBBox;
  82 }
  83
  84 TextStream& SVGResourceFilter::externalRepresentation(TextStream& ts) const
  85 {
  86     ts << "[type=FILTER] ";
  87
  88     FloatRect bbox = filterRect();
  89     static FloatRect defaultFilterRect(0, 0, 1, 1);
  90
  91     if (!filterBoundingBoxMode() || bbox != defaultFilterRect) {
  92         ts << " [bounding box=";
  93         if (filterBoundingBoxMode()) {
  94             bbox.scale(100.f);
  95             ts << "at (" << bbox.x() << "%," <<  bbox.y() << "%) size " << bbox.width() << "%x" << bbox.height() << "%";
  96         } else
  97             ts << filterRect();
  98         ts << "]";
  99     }
 100
 101     if (!filterBoundingBoxMode()) // default is true
 102         ts << " [bounding box mode=" << filterBoundingBoxMode() << "]";
 103     if (effectBoundingBoxMode()) // default is false
 104         ts << " [effect bounding box mode=" << effectBoundingBoxMode() << "]";
 105     if (m_effects.size() > 0)
 106         ts << " [effects=" << m_effects << "]";
 107
 108     return ts;
 109 }
 110
 111 SVGResourceFilter* getFilterById(Document* document, const AtomicString& id)
 112 {
 113     SVGResource* resource = getResourceById(document, id);
 114     if (resource && resource->isFilter())
 115         return static_cast<SVGResourceFilter*>(resource);
 116
 117     return 0;
 118 }
 119
 120
 121 } // namespace WebCore
 122
 123 #endif // ENABLE(SVG)