1 /*
2 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
3 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #include "config.h"
22
23 #if ENABLE(SVG) && ENABLE(FILTERS)
24 #include "SVGFilter.h"
25
26 namespace WebCore {
27
SVGFilter(const AffineTransform & absoluteTransform,const FloatRect & absoluteSourceDrawingRegion,const FloatRect & targetBoundingBox,const FloatRect & filterRegion,bool effectBBoxMode)28 SVGFilter::SVGFilter(const AffineTransform& absoluteTransform, const FloatRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode)
29 : Filter()
30 , m_absoluteTransform(absoluteTransform)
31 , m_absoluteSourceDrawingRegion(absoluteSourceDrawingRegion)
32 , m_targetBoundingBox(targetBoundingBox)
33 , m_filterRegion(filterRegion)
34 , m_effectBBoxMode(effectBBoxMode)
35 {
36 m_absoluteFilterRegion = absoluteTransform.mapRect(filterRegion);
37 }
38
applyHorizontalScale(float value) const39 float SVGFilter::applyHorizontalScale(float value) const
40 {
41 if (m_effectBBoxMode)
42 value *= m_targetBoundingBox.width();
43 return Filter::applyHorizontalScale(value) * m_absoluteFilterRegion.width() / m_filterRegion.width();
44 }
45
applyVerticalScale(float value) const46 float SVGFilter::applyVerticalScale(float value) const
47 {
48 if (m_effectBBoxMode)
49 value *= m_targetBoundingBox.height();
50 return Filter::applyVerticalScale(value) * m_absoluteFilterRegion.height() / m_filterRegion.height();
51 }
52
create(const AffineTransform & absoluteTransform,const FloatRect & absoluteSourceDrawingRegion,const FloatRect & targetBoundingBox,const FloatRect & filterRegion,bool effectBBoxMode)53 PassRefPtr<SVGFilter> SVGFilter::create(const AffineTransform& absoluteTransform, const FloatRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode)
54 {
55 return adoptRef(new SVGFilter(absoluteTransform, absoluteSourceDrawingRegion, targetBoundingBox, filterRegion, effectBBoxMode));
56 }
57
58 } // namespace WebCore
59
60 #endif // ENABLE(SVG) && ENABLE(FILTERS)
61