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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!sgiblab!sgigate!sgi!fido!tuolumne!akin
- From: akin@tuolumne.asd.sgi.com (Allen Akin)
- Newsgroups: comp.graphics.opengl
- Subject: Re: Off-Screen Images
- Date: 20 Nov 1992 02:08:33 GMT
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 18
- Message-ID: <1ehhb1INNm84@fido.asd.sgi.com>
- References: <1992Nov19.181246.1@mcclb0.med.nyu.edu>
- NNTP-Posting-Host: tuolumne.asd.sgi.com
-
-
- In article <1992Nov19.181246.1@mcclb0.med.nyu.edu>, ramirez@mcclb0.med.nyu.edu writes:
- >
- > I know that GL is optimized to do faster image manipulations directly
- > onto the screen (I think). However, is there a way to do image manipulations
- > with GL without displaying these images?
-
- Were you asking about IRIS GL, or OpenGL?
-
- OpenGL can be used to draw to pixmaps (under X11) or device-independent
- bitmaps (under Windows NT).
-
- Machines from Silicon Graphics often draw onscreen more quickly than they
- draw offscreen, but this is a characteristic of the hardware rather than
- OpenGL. OpenGL will draw into offscreen memory at full speed on existing
- machines from other vendors.
-
- Allen
-