I need to scale the result of glDrawPixels image. I'm drawing a 640x480 pixels image buffer with glDrawPixels in a Qt QGLWidget. I tryed to do the following in PaintGL: glScalef(windowWidth/640...

I'm trying to implement the technique described at : Compositing Images with Depth. The idea is to use an existing texture (loaded from an image) as a depth mask, to basically fake 3D. The probl...