Re: Inverting Image data?

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1 total messages Started by Colin Fox Sat, 22 Dec 1990 09:49

#7667

Author: Colin Fox
Date: Sat, 22 Dec 1990 09:49

23 lines
1235 bytes

> taran@Neon.Stanford.EDU writes:
> 
> Msg-ID: <1990Dec19.184510.23035@Neon.Stanford.EDU>
> Posted: 19 Dec 90 18:45:10 GMT
> 
> Org.  : Computer Science Department, Stanford University
> Person: Lee Taran
> 
> Question about Image structs in Intuition gadgets:
> 
> If you have a one bit plane image data, and you are displaying it in
> a one bit-plane screen, there seems to be no way to get the image to
> appear reversed, ie, to use color 0 where image is 1 and color 1 where
> image is zero without inverting the image or swapping the colors.
> Is that correct or am I missing something?
> 
> ---Lee
> (taran@neon.stanford.edu)

All you have to do is 1) SetDrMd(rastport,RP_COMPLEMENT) (XOR), and then
RectFill() over your image. That will invert it (0<->1).

   --- Colin ---

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