Convert image

Roy44

Hi,

I would like to convert an image from format Format_ARGB32_Premultiplied to Format_RGB888 with white background
but the background goes black.

I try something like :

QPainter painter;
painter.begin(&imgRet);
painter.setBackgroundMode(Qt::OpaqueMode);
painter.setBackground(Qt::white);
painter.drawImage(0,0 , image);
painter.end();

but the background is gray.
How can I do this ?
thanks.

(Sorry for my english.)

VRonin

There's probably a better way but you can use:

// QImage imgRet;
for(int i=0,maxW=imgRet.width();i<maxW;++i){
for(int j=0,maxH=imgRet.height();j<maxH;++j){
if(qAlpha(imgRet.pixel(i,j))<0xff)
imgRet.setPixel(i,j,qRgba(0xff,0xff,0xff,0xff));
}
}
imgRet=imgRet.convertToFormat(QImage::Format_RGB888);

Roy44

I works,
Thanks.