Qt界面开发程序中,需要将背景为白色的图片改为透明色。
这里,贴出处理代码,仅供参考学习:
void ConvertImageToTransparent(QPixmap qPixmap){QImage image = qPixmap.toImage();image = image.convertToFormat(QImage::Format_ARGB32);union myrgb{uint rgba;uchar rgba_bits[4];};myrgb* mybits =(myrgb*) image.bits();int len = image.width()*image.height();while(len --> 0){mybits->rgba_bits[3] = (mybits->rgba== 0xFFFFFFFF)?0:255;mybits++;}}