//need ul corner of bitmap, ul corner of dest, width/height
p.setCompositionMode(QPainter::RasterOp_NotSource);
// QPoint pt(sizeStamp.x() * (prevTool & 0x03), sizeStamp.y() * (prevTool >> 2));
//need ul corner of bitmap, ul corner of dest, width/height
p.setCompositionMode(QPainter::RasterOp_NotSource);
// QPoint pt(sizeStamp.x() * (prevTool & 0x03), sizeStamp.y() * (prevTool >> 2));