a447@mindlink.UUCP (Colin Fox) (12/22/90)
> 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 ---