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/*
* Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
* Copyright (C) 2009 Dirk Schulze <krit@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
* along 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.
*/
#include "config.h"
#if ENABLE(SVG) && ENABLE(FILTERS)
#include "SVGFETile.h"
#include "AffineTransform.h"
#include "Filter.h"
#include "GraphicsContext.h"
#include "Pattern.h"
#include "SVGRenderTreeAsText.h"
namespace WebCore {
FETile::FETile()
: FilterEffect()
{
}
PassRefPtr<FETile> FETile::create()
{
return adoptRef(new FETile);
}
FloatRect FETile::determineFilterPrimitiveSubregion(Filter* filter)
{
inputEffect(0)->determineFilterPrimitiveSubregion(filter);
filter->determineFilterPrimitiveSubregion(this, filter->filterRegion());
return filterPrimitiveSubregion();
}
void FETile::apply(Filter* filter)
{
FilterEffect* in = inputEffect(0);
in->apply(filter);
if (!in->resultImage())
return;
GraphicsContext* filterContext = getEffectContext();
if (!filterContext)
return;
setIsAlphaImage(in->isAlphaImage());
IntRect tileRect = enclosingIntRect(in->repaintRectInLocalCoordinates());
// Source input needs more attention. It has the size of the filterRegion but gives the
// size of the cutted sourceImage back. This is part of the specification and optimization.
if (in->isSourceInput()) {
FloatRect filterRegion = filter->filterRegion();
filterRegion.scale(filter->filterResolution().width(), filter->filterResolution().height());
tileRect = enclosingIntRect(filterRegion);
}
OwnPtr<ImageBuffer> tileImage = ImageBuffer::create(tileRect.size());
GraphicsContext* tileImageContext = tileImage->context();
tileImageContext->drawImageBuffer(in->resultImage(), DeviceColorSpace, IntPoint());
RefPtr<Pattern> pattern = Pattern::create(tileImage->copyImage(), true, true);
AffineTransform matrix;
matrix.translate(in->repaintRectInLocalCoordinates().x() - repaintRectInLocalCoordinates().x(),
in->repaintRectInLocalCoordinates().y() - repaintRectInLocalCoordinates().y());
pattern.get()->setPatternSpaceTransform(matrix);
filterContext->setFillPattern(pattern);
filterContext->fillRect(FloatRect(FloatPoint(), repaintRectInLocalCoordinates().size()));
}
void FETile::dump()
{
}
TextStream& FETile::externalRepresentation(TextStream& ts, int indent) const
{
writeIndent(ts, indent);
ts << "[feTile";
FilterEffect::externalRepresentation(ts);
ts << "]\n";
inputEffect(0)->externalRepresentation(ts, indent + 1);
return ts;
}
} // namespace WebCore
#endif // ENABLE(SVG) && ENABLE(FILTERS)
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