u-jmolse%sunset.utah.edu@utah-gr.UUCP (John M. Olsen) (06/18/88)
First the problem: I have a line equation in slope, y-intercept format,
and need to incriment or decriment all of the colors on one side of that
line.
First try solution: When a pixel needs modifying, I read it's color, do
a SetAPen(r,color + 1L) and then write the pixel back out. I also check to
make sure that 0 doesn't decriment and 31 doesn't incriment.
There's gotta be a better way. Any suggestions? I can't see that I'd get a
benefit from reading bitmaps and doing it a word at a time since that word
may contain 16 different colors that require incrimenting.
/| | /||| /\| | John M. Olsen, 1547 Jamestown Drive
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