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- Newsgroups: comp.sys.sgi.graphics
- Path: sparky!uunet!usc!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!ames!eos!aio!norm!goza
- From: goza@norm.JSC.NASA.GOV (Mike Goza)
- Subject: Dithering/True Color on PI, Indigos
- Message-ID: <1993Jan6.135721.15635@aio.jsc.nasa.gov>
- Sender: goza@norm (Mike Goza)
- Organization: IGOAL
- Date: Wed, 6 Jan 1993 13:57:21 GMT
- Lines: 18
-
- I have a PI (and assume the following problem is on indigos as well)
- and I am in double buffer mode. I wish to cpack a color and draw
- polygons without lighting. This in effect color codes polygons which
- I use for different applications. I check the number of bitplanes
- available and do not let the color range exceed the value for the
- number of colors available. This method of coloring polygons works
- great on all machines except the ones that dither. My question is
- this...Can I turn the dithering OFF so the machine will use the cpacked
- color I pass it while staying in double buffer mode? I would have thought
- it would have used the value in cpack. I am passing cpack a long int in the
- form of 0xAABBGGRR as per the man pages. Does this need to be different
- for 12 bitplanes? Is there anything that can be done to fix this?
-
- Any help would be appreciated. Please email or post.
-
- Thanks,
- Mike Goza
- goza@cheers.jsc.nasa.gov
-