Subj : Re: How to read a pixel from a DIB?
To   : borland.public.cpp.borlandcpp
From : Sebastian Ledesma
Date : Wed Oct 20 2004 05:33 pm

Actually I found the working way:

    unsigned char *pixel=(unsigned char *)fondo->PixelPtr(xRef,
fondo->FlippedY(yRef));

    switch (fondo->BitsPixel()) {
      case 24:
        b= *pixel;  //previuos version was r=*pixel
        g= *(pixel+1);
        r= *(pixel+2); //previous version was g=*(pixel+2)
        break;
        ...
    }

Saludos
Sebastian




" Bruce Salzman" <bruce@nospam.org> escribió en el mensaje
news:4176868b$1@newsgroups.borland.com...
> >
> > That's the way I will use, only lazzines before coding. I have to
> > convert
> > X,Y coordinates into a linear coordinate (hey that's so hard!!!
> > :-) ), also
> > what about for non 24 bits bitmaps. In 16 bits bitmaps I will have
> > RGB in 5
> > bits, in 8 bits I will have a palette index, and in 4 bits (old 16
> > colored
> > bitmaps) something similar.
> >

.