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      1 /*
      2  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) 2005 Eric Seidel <eric (at) webkit.org>
      5  * Copyright (C) 2010 Dirk Schulze <krit (at) webkit.org>
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  */
     22 
     23 #include "config.h"
     24 
     25 #if ENABLE(SVG) && ENABLE(FILTERS)
     26 #include "SVGFEImage.h"
     27 
     28 #include "AffineTransform.h"
     29 #include "Filter.h"
     30 #include "GraphicsContext.h"
     31 #include "RenderTreeAsText.h"
     32 #include "SVGPreserveAspectRatio.h"
     33 #include "TextStream.h"
     34 
     35 namespace WebCore {
     36 
     37 FEImage::FEImage(Filter* filter, RefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
     38     : FilterEffect(filter)
     39     , m_image(image)
     40     , m_preserveAspectRatio(preserveAspectRatio)
     41 {
     42 }
     43 
     44 PassRefPtr<FEImage> FEImage::create(Filter* filter, RefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
     45 {
     46     return adoptRef(new FEImage(filter, image, preserveAspectRatio));
     47 }
     48 
     49 void FEImage::determineAbsolutePaintRect()
     50 {
     51     ASSERT(m_image);
     52     FloatRect srcRect(FloatPoint(), m_image->size());
     53     FloatRect paintRect(m_absoluteSubregion);
     54     m_preserveAspectRatio.transformRect(paintRect, srcRect);
     55     paintRect.intersect(maxEffectRect());
     56     setAbsolutePaintRect(enclosingIntRect(paintRect));
     57 }
     58 
     59 void FEImage::apply()
     60 {
     61     if (!m_image.get() || hasResult())
     62         return;
     63 
     64     ImageBuffer* resultImage = createImageBufferResult();
     65     if (!resultImage)
     66         return;
     67 
     68     FloatRect srcRect(FloatPoint(), m_image->size());
     69     FloatRect destRect(m_absoluteSubregion);
     70     m_preserveAspectRatio.transformRect(destRect, srcRect);
     71 
     72     IntPoint paintLocation = absolutePaintRect().location();
     73     destRect.move(-paintLocation.x(), -paintLocation.y());
     74 
     75     resultImage->context()->drawImage(m_image.get(), ColorSpaceDeviceRGB, destRect, srcRect);
     76 }
     77 
     78 void FEImage::dump()
     79 {
     80 }
     81 
     82 TextStream& FEImage::externalRepresentation(TextStream& ts, int indent) const
     83 {
     84     ASSERT(m_image);
     85     IntSize imageSize = m_image->size();
     86     writeIndent(ts, indent);
     87     ts << "[feImage";
     88     FilterEffect::externalRepresentation(ts);
     89     ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n";
     90     // FIXME: should this dump also object returned by SVGFEImage::image() ?
     91     return ts;
     92 }
     93 
     94 } // namespace WebCore
     95 
     96 #endif // ENABLE(SVG) && ENABLE(FILTERS)
     97