static inline bool fillPoint_Gray( QImage &image, QPoint p, uchar low, uchar high, uchar newVal, QStack
{
int x = p.rx();
int y = p.ry();
uchar *line = image.scanLine(y);
if( line[x] < low || line[x] > high )
{
return false;
}
line[x] = newVal;
if( y > 0 )
{
uchar *last = image.scanLine(y - 1);
if( last[x] >= low && last[x] <= high )
{
stack.push(QPoint(x, y - 1));
}
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