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/*
* Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
* Copyright (C) 2005 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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(FILTERS)
#include "FEOffset.h"
#include "Filter.h"
#include "GraphicsContext.h"
namespace WebCore {
FEOffset::FEOffset(Filter* filter, float dx, float dy)
: FilterEffect(filter)
, m_dx(dx)
, m_dy(dy)
{
}
PassRefPtr<FEOffset> FEOffset::create(Filter* filter, float dx, float dy)
{
return adoptRef(new FEOffset(filter, dx, dy));
}
float FEOffset::dx() const
{
return m_dx;
}
void FEOffset::setDx(float dx)
{
m_dx = dx;
}
float FEOffset::dy() const
{
return m_dy;
}
void FEOffset::setDy(float dy)
{
m_dy = dy;
}
void FEOffset::determineAbsolutePaintRect()
{
FloatRect paintRect = inputEffect(0)->absolutePaintRect();
Filter* filter = this->filter();
paintRect.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
paintRect.intersect(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEOffset::apply()
{
FilterEffect* in = inputEffect(0);
in->apply();
if (!in->resultImage())
return;
GraphicsContext* filterContext = effectContext();
if (!filterContext)
return;
setIsAlphaImage(in->isAlphaImage());
FloatRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
Filter* filter = this->filter();
drawingRegion.move(filter->applyHorizontalScale(m_dx), filter->applyVerticalScale(m_dy));
filterContext->drawImageBuffer(in->resultImage(), ColorSpaceDeviceRGB, drawingRegion);
}
void FEOffset::dump()
{
}
TextStream& FEOffset::externalRepresentation(TextStream& ts, int indent) const
{
writeIndent(ts, indent);
ts << "[feOffset";
FilterEffect::externalRepresentation(ts);
ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n";
inputEffect(0)->externalRepresentation(ts, indent + 1);
return ts;
}
} // namespace WebCore
#endif // ENABLE(FILTERS)
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