[Qt-interest] Getting number of pixels in a QImage

[Rainer Wiesenfarth]

From: Keshava Krishna [mailto:keshavkrishna88 at gmail.com] 
> @Rainer,
> 
> have a look at the code...
> 
> QColor *pixelColor;
>  int c;
> image=new QImage(imageFileName);
> for(int i=0;i<image->width();i++)
> {
>       for(int j=0;j<image->height();j++)
>         {
> 
>                     pixelColor = new QColor(image->pixel(i,j));
>                     pixelColor->setAlphaF(0.3);
>                      c = pixelColor->rgba();
>                      image->setPixel(i,j,c);
>           }
> }
> [...]

You swapped row and column of the image. So either i should run from 0 to
height() and j from 0 to width(), or the calls should be pixel(j,i) and
setPixel(j,i,c).

See what a code snippet can do to solve your problem? ;-)

Best Regards / Mit freundlichen Grüßen
Rainer Wiesenfarth

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