2 * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
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.
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.
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.
26 #include "SVGFEImage.h"
28 #include "AffineTransform.h"
30 #include "GraphicsContext.h"
31 #include "RenderElement.h"
32 #include "RenderTreeAsText.h"
33 #include "SVGElement.h"
34 #include "SVGPreserveAspectRatio.h"
35 #include "SVGRenderingContext.h"
36 #include "SVGURIReference.h"
37 #include "TextStream.h"
41 FEImage::FEImage(Filter* filter, PassRefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
42 : FilterEffect(filter)
45 , m_preserveAspectRatio(preserveAspectRatio)
49 FEImage::FEImage(Filter* filter, Document& document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
50 : FilterEffect(filter)
51 , m_document(&document)
53 , m_preserveAspectRatio(preserveAspectRatio)
57 PassRefPtr<FEImage> FEImage::createWithImage(Filter* filter, PassRefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
59 return adoptRef(new FEImage(filter, image, preserveAspectRatio));
62 PassRefPtr<FEImage> FEImage::createWithIRIReference(Filter* filter, Document& document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
64 return adoptRef(new FEImage(filter, document, href, preserveAspectRatio));
67 void FEImage::determineAbsolutePaintRect()
69 FloatRect paintRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion());
72 srcRect.setSize(m_image->size());
73 m_preserveAspectRatio.transformRect(paintRect, srcRect);
74 } else if (RenderElement* renderer = referencedRenderer())
75 srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
78 paintRect.intersect(maxEffectRect());
80 paintRect.unite(maxEffectRect());
81 setAbsolutePaintRect(enclosingIntRect(paintRect));
84 RenderElement* FEImage::referencedRenderer() const
88 Element* hrefElement = SVGURIReference::targetElementFromIRIString(m_href, *m_document);
89 if (!hrefElement || !hrefElement->isSVGElement())
91 return hrefElement->renderer();
94 void FEImage::platformApplySoftware()
96 RenderElement* renderer = referencedRenderer();
97 if (!m_image && !renderer)
100 ImageBuffer* resultImage = createImageBufferResult();
104 FloatRect destRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion());
108 srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
110 srcRect = FloatRect(FloatPoint(), m_image->size());
111 m_preserveAspectRatio.transformRect(destRect, srcRect);
114 IntPoint paintLocation = absolutePaintRect().location();
115 destRect.move(-paintLocation.x(), -paintLocation.y());
117 // FEImage results are always in ColorSpaceDeviceRGB
118 setResultColorSpace(ColorSpaceDeviceRGB);
121 const AffineTransform& absoluteTransform = filter().absoluteTransform();
122 resultImage->context()->concatCTM(absoluteTransform);
124 SVGElement* contextNode = toSVGElement(renderer->element());
125 if (contextNode->hasRelativeLengths()) {
126 SVGLengthContext lengthContext(contextNode);
127 FloatSize viewportSize;
129 // If we're referencing an element with percentage units, eg. <rect with="30%"> those values were resolved against the viewport.
130 // Build up a transformation that maps from the viewport space to the filter primitive subregion.
131 if (lengthContext.determineViewport(viewportSize))
132 resultImage->context()->concatCTM(makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect));
135 AffineTransform contentTransformation;
136 SVGRenderingContext::renderSubtreeToImageBuffer(resultImage, *renderer, contentTransformation);
140 resultImage->context()->drawImage(m_image.get(), ColorSpaceDeviceRGB, destRect, srcRect);
147 TextStream& FEImage::externalRepresentation(TextStream& ts, int indent) const
151 imageSize = m_image->size();
152 else if (RenderObject* renderer = referencedRenderer())
153 imageSize = enclosingIntRect(renderer->repaintRectInLocalCoordinates()).size();
154 writeIndent(ts, indent);
156 FilterEffect::externalRepresentation(ts);
157 ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n";
158 // FIXME: should this dump also object returned by SVGFEImage::image() ?
162 } // namespace WebCore
164 #endif // ENABLE(FILTERS)