quint8 KisPressureRateOption::apply( quint8 opacity, qint32 sw, qint32 sh, KisPaintDeviceSP srcdev, double pressure) const
{
opacity = rate();
if (isChecked()) {
if (customCurve()) {
opacity = qBound((qint32)OPACITY_TRANSPARENT,
(qint32)(double(opacity) * scaleToCurve(pressure) / PRESSURE_DEFAULT),
(qint32)OPACITY_OPAQUE);
} else {
opacity = qBound((qint32)OPACITY_TRANSPARENT,
(qint32)(double(opacity) * pressure / PRESSURE_DEFAULT),
(qint32)OPACITY_OPAQUE);
}
}
#if 0
// TODO It's also applied in the smudgeop, do other paintops that require a rate
// needs to do this to their srcDev ?
KisRectIterator it = srcdev->createRectIterator(0, 0, sw, sh);
KoColorSpace* cs = srcdev->colorSpace();
while (not it.isDone()) {
cs->setAlpha(it.rawData(), (cs->alpha(it.rawData()) * opacity) / OPACITY_OPAQUE, 1);
++it;
}
return OPACITY_OPAQUE - opacity;
#else
return opacity;
#endif
}
void KisSmudgeOp::paintAt(const KisPaintInformation& info)
{
if (!painter()->device()) return;
KisBrushSP brush = m_brush;
Q_ASSERT(brush);
if (!brush) return;
KisPaintInformation adjustedInfo = settings->m_optionsWidget->m_sizeOption->apply(info);
if (! brush->canPaintFor(adjustedInfo))
return;
KisPaintDeviceSP device = painter()->device();
double pScale = KisPaintOp::scaleForPressure(adjustedInfo.pressure());
QPointF hotSpot = brush->hotSpot(pScale, pScale);
QPointF pt = info.pos() - hotSpot;
// Split the coordinates into integer plus fractional parts. The integer
// is where the dab will be positioned and the fractional part determines
// the sub-pixel positioning.
qint32 x;
double xFraction;
qint32 y;
double yFraction;
splitCoordinate(pt.x(), &x, &xFraction);
splitCoordinate(pt.y(), &y, &yFraction);
KisFixedPaintDeviceSP dab = 0;
double scale = KisPaintOp::scaleForPressure(adjustedInfo.pressure());
QRect dabRect = QRect(0, 0, brush->maskWidth(scale, 0.0), brush->maskHeight(scale, 0.0));
QRect dstRect = QRect(x, y, dabRect.width(), dabRect.height());
if (dstRect.isNull() || dstRect.isEmpty() || !dstRect.isValid()) return;
if (brush->brushType() == IMAGE || brush->brushType() == PIPE_IMAGE) {
dab = brush->image(device->colorSpace(), pScale, 0.0, adjustedInfo, xFraction, yFraction);
dab->convertTo(KoColorSpaceRegistry::instance()->alpha8());
} else {
dab = cachedDab();
KoColor color = painter()->paintColor();
dab->convertTo(KoColorSpaceRegistry::instance()->alpha8());
brush->mask(dab, color, scale, pScale, 0.0, info, xFraction, yFraction);
}
qint32 sw = dab->bounds().width();
qint32 sh = dab->bounds().height();
/* To smudge, one does the following:
* at first, initialize a temporary paint device with a copy of the original (dab-sized piece, really).
* all other times:
reduce the transparency of the temporary paint device so as to let it mix gradually
* combine the temp device with the piece the brush currently is 'painting', according to a mix (opacity)
note that in the first step, this does the actual copying of the data
* this combination is then composited upon the actual image
TODO: what happened exactly in 1.6 (and should happen now) when the dab resizes halfway due to pressure?
*/
int opacity = OPACITY_OPAQUE;
if (!m_firstRun) {
opacity = settings->m_optionsWidget->m_rateOption->apply( opacity, sw, sh, m_srcdev, info.pressure() );
KisRectIterator it = m_srcdev->createRectIterator(0, 0, sw, sh);
KoColorSpace* cs = m_srcdev->colorSpace();
while(!it.isDone()) {
cs->setAlpha(it.rawData(), (cs->alpha(it.rawData()) * opacity) / OPACITY_OPAQUE, 1);
++it;
}
opacity = OPACITY_OPAQUE - opacity;
} else {
m_firstRun = false;
}
KisPainter copyPainter(m_srcdev);
copyPainter.setOpacity(opacity);
copyPainter.bitBlt(0, 0, device, pt.x(), pt.y(), sw, sh);
copyPainter.end();
m_target = new KisPaintDevice(device->colorSpace());
// Looks hacky, but we lost bltMask, or the ability to easily convert alpha8 paintdev to selection?
KisSelectionSP dabAsSelection = new KisSelection();
copyPainter.begin(dabAsSelection);
copyPainter.setOpacity(OPACITY_OPAQUE);
copyPainter.setCompositeOp(COMPOSITE_COPY);
copyPainter.bltFixed(0, 0, dab, 0, 0, sw, sh);
copyPainter.end();
copyPainter.begin(m_target);
copyPainter.setCompositeOp(COMPOSITE_OVER);
copyPainter.setSelection(dabAsSelection);
copyPainter.bitBlt(0, 0, m_srcdev, 0, 0, sw, sh);
copyPainter.end();
qint32 sx = dstRect.x() - x;
qint32 sy = dstRect.y() - y;
sw = dstRect.width();
sh = dstRect.height();
painter()->bitBlt(dstRect.x(), dstRect.y(), m_target, sx, sy, sw, sh);
}