bool KisBrush::isPiercedApprox() const
{
QImage image = brushTipImage();
qreal w = image.width();
qreal h = image.height();
qreal xPortion = qMin(0.1, 5.0 / w);
qreal yPortion = qMin(0.1, 5.0 / h);
int x0 = std::floor((0.5 - xPortion) * w);
int x1 = std::ceil((0.5 + xPortion) * w);
int y0 = std::floor((0.5 - yPortion) * h);
int y1 = std::ceil((0.5 + yPortion) * h);
const int maxNumSamples = (x1 - x0 + 1) * (y1 - y0 + 1);
const int failedPixelsThreshold = 0.1 * maxNumSamples;
const int thresholdValue = 0.95 * 255;
int failedPixels = 0;
for (int y = y0; y <= y1; y++) {
for (int x = x0; x <= x1; x++) {
QRgb pixel = image.pixel(x,y);
if (qRed(pixel) > thresholdValue) {
failedPixels++;
}
}
}
return failedPixels > failedPixelsThreshold;
}
void KisBrush::prepareBrushPyramid() const
{
if (!d->brushPyramid) {
d->brushPyramid = new KisQImagePyramid(brushTipImage());
}
}
