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/* This file is part of the KDE project
* Copyright (c) 2009 Jan Hambrecht <jaham@gmx.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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 Lesser 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 "CompositeEffect.h"
#include "ColorChannelConversion.h"
#include <KoFilterEffectRenderContext.h>
#include <KoViewConverter.h>
#include <KoXmlWriter.h>
#include <KoXmlReader.h>
#include <klocalizedstring.h>
#include <QDebug>
#include <QRect>
#include <QPainter>
CompositeEffect::CompositeEffect()
: KoFilterEffect(CompositeEffectId, i18n("Composite"))
, m_operation(CompositeOver)
{
setRequiredInputCount(2);
setMaximalInputCount(2);
memset(m_k, 0, 4*sizeof(qreal));
}
CompositeEffect::Operation CompositeEffect::operation() const
{
return m_operation;
}
void CompositeEffect::setOperation(Operation op)
{
m_operation = op;
}
const qreal * CompositeEffect::arithmeticValues() const
{
return m_k;
}
void CompositeEffect::setArithmeticValues(qreal * values)
{
memcpy(m_k, values, 4*sizeof(qreal));
}
QImage CompositeEffect::processImage(const QImage &image, const KoFilterEffectRenderContext &) const
{
return image;
}
QImage CompositeEffect::processImages(const QVector<QImage> &images, const KoFilterEffectRenderContext &context) const
{
int imageCount = images.count();
if (!imageCount)
return QImage();
QImage result = images[0];
if (images.count() != 2) {
return result;
}
if (m_operation == Arithmetic) {
const QRgb *src = (QRgb*)images[1].constBits();
QRgb *dst = (QRgb*)result.bits();
int w = result.width();
qreal sa, sr, sg, sb;
qreal da, dr, dg, db;
int pixel = 0;
// TODO: do we have to calculate with non-premuliplied colors here ???
QRect roi = context.filterRegion().toRect();
for (int row = roi.top(); row < roi.bottom(); ++row) {
for (int col = roi.left(); col < roi.right(); ++col) {
pixel = row * w + col;
const QRgb &s = src[pixel];
QRgb &d = dst[pixel];
sa = fromIntColor[qAlpha(s)];
sr = fromIntColor[qRed(s)];
sg = fromIntColor[qGreen(s)];
sb = fromIntColor[qBlue(s)];
da = fromIntColor[qAlpha(d)];
dr = fromIntColor[qRed(d)];
dg = fromIntColor[qGreen(d)];
db = fromIntColor[qBlue(d)];
da = m_k[0] * sa * da + m_k[1] * da + m_k[2] * sa + m_k[3];
dr = m_k[0] * sr * dr + m_k[1] * dr + m_k[2] * sr + m_k[3];
dg = m_k[0] * sg * dg + m_k[1] * dg + m_k[2] * sg + m_k[3];
db = m_k[0] * sb * db + m_k[1] * db + m_k[2] * sb + m_k[3];
da *= 255.0;
// set pre-multiplied color values on destination image
d = qRgba(static_cast<quint8>(qBound(qreal(0.0), dr * da, qreal(255.0))),
static_cast<quint8>(qBound(qreal(0.0), dg * da, qreal(255.0))),
static_cast<quint8>(qBound(qreal(0.0), db * da, qreal(255.0))),
static_cast<quint8>(qBound(qreal(0.0), da, qreal(255.0))));
}
}
} else {
QPainter painter(&result);
switch (m_operation) {
case CompositeOver:
painter.setCompositionMode(QPainter::CompositionMode_DestinationOver);
break;
case CompositeIn:
painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
break;
case CompositeOut:
painter.setCompositionMode(QPainter::CompositionMode_DestinationOut);
break;
case CompositeAtop:
painter.setCompositionMode(QPainter::CompositionMode_DestinationAtop);
break;
case CompositeXor:
painter.setCompositionMode(QPainter::CompositionMode_Xor);
break;
default:
// no composition mode
break;
}
painter.drawImage(context.filterRegion(), images[1], context.filterRegion());
}
return result;
}
bool CompositeEffect::load(const KoXmlElement &element, const KoFilterEffectLoadingContext &)
{
if (element.tagName() != id())
return false;
QString opStr = element.attribute("operator");
if (opStr == "over") {
m_operation = CompositeOver;
} else if (opStr == "in") {
m_operation = CompositeIn;
} else if (opStr == "out") {
m_operation = CompositeOut;
} else if (opStr == "atop") {
m_operation = CompositeAtop;
} else if (opStr == "xor") {
m_operation = CompositeXor;
} else if (opStr == "arithmetic") {
m_operation = Arithmetic;
if (element.hasAttribute("k1"))
m_k[0] = element.attribute("k1").toDouble();
if (element.hasAttribute("k2"))
m_k[1] = element.attribute("k2").toDouble();
if (element.hasAttribute("k3"))
m_k[2] = element.attribute("k3").toDouble();
if (element.hasAttribute("k4"))
m_k[3] = element.attribute("k4").toDouble();
} else {
return false;
}
if (element.hasAttribute("in2")) {
if (inputs().count() == 2)
setInput(1, element.attribute("in2"));
else
addInput(element.attribute("in2"));
}
return true;
}
void CompositeEffect::save(KoXmlWriter &writer)
{
writer.startElement(CompositeEffectId);
saveCommonAttributes(writer);
switch (m_operation) {
case CompositeOver:
writer.addAttribute("operator", "over");
break;
case CompositeIn:
writer.addAttribute("operator", "in");
break;
case CompositeOut:
writer.addAttribute("operator", "out");
break;
case CompositeAtop:
writer.addAttribute("operator", "atop");
break;
case CompositeXor:
writer.addAttribute("operator", "xor");
break;
case Arithmetic:
writer.addAttribute("operator", "arithmetic");
writer.addAttribute("k1", QString("%1").arg(m_k[0]));
writer.addAttribute("k2", QString("%1").arg(m_k[1]));
writer.addAttribute("k3", QString("%1").arg(m_k[2]));
writer.addAttribute("k4", QString("%1").arg(m_k[3]));
break;
}
writer.addAttribute("in2", inputs().at(1));
writer.endElement();
}
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