Conference hydra::amiga_v1

615.0. "Color Swapping" by VIDEO::LEIBOW () Mon Jul 27 1987 08:37

    Howdy,
    
    I have a programming question here.  I could not find the answer
    in any of the Addison-Wesmumble manuals.
    
    I would like to swap the foreground and background colors of a screen
    when I don't have a copy of the color map or color table.  I have
    the following code:
    
    myviewport = (struct ViewPort*) ViewPortAddress(mywindows);
    colors = myviewport->ColorMap->ColorTable;
    tmp = colors[0];
    colors[0] = colors[1];
    colors[1] = tmp;
    LoadRGB4(myviewport, colors, SOme_STUPID_NUMBER_OF_COLORS);
    
    The problem is this works about half of the time.  The other half
    of the time, my screen turns real dark and I can't see anything.
    Anyone got any ideas on a better way to do this?
    
    Thanks