Article View: comp.sys.sgi.graphics
Article #19PM_ADD24 on RE
From: Michael Manyin
Date: Mon, 28 Dec 1992 19:19
Date: Mon, 28 Dec 1992 19:19
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We are porting a program from a VGX platform to a Crimson/RealityEngine, and have been finding it difficult to make full use of the 4096-entry colormap when lrectwrite'ing 8-bit images. Specifically, we suspect that the call pixmode( PM_ADD24, 256 ); on the RealityEngine, is the problem. In fact, any integer offset greater than 0 produces anomalous behavior. The pixmode manual page claims that "Pixel addition can... be used to offset the range of a color map image", and our code works fine on VGX and Indigo Elan machines. Any hints or suggestions, posted or mailed, would be appreciated. Thanks! Mike Manyin ------- cross posted to: comp.sys.sgi comp.sys.sgi.graphics -- -------------------------------------------------------------------- Michael Manyin NASA/GSFC manyin@helene.gsfc.nasa.gov Lab for Atmospheres, Code 912 US: (301) 286-7825 Greenbelt, Maryland 20771
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<1992Dec28.141906@helene.gsfc.nasa.gov>Path:
arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sun-barr!ames!nsisrv!helene.gsfc.nasa.gov!manyinShow Full Headers
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Newsgroups: comp.sys.sgi.graphics Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!sun-barr!ames!nsisrv!helene.gsfc.nasa.gov!manyin From: manyin@helene.gsfc.nasa.gov (Michael Manyin) Subject: PM_ADD24 on RE Message-ID: <1992Dec28.141906@helene.gsfc.nasa.gov> Sender: usenet@nsisrv.gsfc.nasa.gov (Usenet) Nntp-Posting-Host: helene.gsfc.nasa.gov Reply-To: manyin@helene.gsfc.nasa.gov (Michael Manyin) Organization: NASA Goddard Space Flight Center Date: Mon, 28 Dec 1992 19:19:06 GMT Lines: 32