Re: A89: White/Invert Line
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Re: A89: White/Invert Line
I am not writing any routines, but I am interested in the algorithm.
On Fri, 18 Dec 1998 19:05:26 EST Daniel7073@aol.com writes:
>
>In a message dated 12/16/1998 11:45:24 AM Pacific Standard Time,
>nblizard@bellsouth.net writes:
>
>> Does anyone have a routine that will draw a white or inverted
>line
>> or can they tell me what to change in fline, which is used in the
>> linelib, so that will do it?
>>
>
>I don't think there's a line drawing function that supports this.
>Basically,
>you would have to add a parameter in fline for write mode, then change
>fline
>to check the parameter and draw the pixel the right way. This won't
>work if
>fline just calls the ROM functions though. You'll have to write your
>own line
>drawing function. (I have an algorithm for it if you're interested.)
>
>Daniel Imfeld
>
>Daniel Imfeld
>
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