void KisBidirectionalMixingOption::apply(KisPaintDeviceSP dab, KisPaintDeviceSP device, KisPainter* painter, qint32 sx, qint32 sy, qint32 sw, qint32 sh, quint8 pressure, const QRect& dstRect)
{
if (!isChecked()) return;
KoColorSpace *cs = dab->colorSpace();
KisPaintDeviceSP canvas = new KisPaintDevice(cs);
KisPainter p(canvas);
p.setCompositeOp(COMPOSITE_COPY);
p.bitBlt(sx, sy, device, dstRect.x(), dstRect.y(), sw, sh);
int count = cs->channelCount();
KisRectIterator cit = canvas->createRectIterator(sx, sy, sw, sh);
KisRectIterator dit = dab->createRectIterator(sx, sy, sw, sh);
QVector<float> cc(count), dc(count);
while (!cit.isDone()) {
if (cs->alpha(dit.rawData()) > 10 && cs->alpha(cit.rawData()) > 10) {
cs->normalisedChannelsValue(cit.rawData(), cc);
cs->normalisedChannelsValue(dit.rawData(), dc);
for (int i = 0; i < count; i++)
dc[i] = (1.0 - 0.4 * pressure) * cc[i] + 0.4 * pressure * dc[i];
cs->fromNormalisedChannelsValue(dit.rawData(), dc);
if (dit.x() == (int)(sw / 2) && dit.y() == (int)(sh / 2))
painter->setPaintColor(KoColor(dit.rawData(), cs));
}
++cit;
++dit;
}
}
