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- Newsgroups: comp.windows.x,comp.windows.ms.programmer
- Path: sparky!uunet!destroyer!gatech!concert!mercury!jck
- From: jck@mercury.ncat.edu
- Subject: window update schemes
- Message-ID: <1992Nov18.012034.6208@mercury.ncat.edu>
- Organization: North Carolina A&T State University
- Date: Wed, 18 Nov 1992 01:20:34 GMT
- Lines: 25
-
-
- I'm developing an alternate architecture for high-performance displays
- and need some information. I think I know how the application
- determines what to redraw. I hope some of you have looked close enough
- at that part of a windowed display application to be able to tell me
- how it works.
-
- I think there are basically two ways to do this (I'm sure there are
- more, but I want to stimulate responses). The image on the tube can
- be formed by reading it directly from a memory-based image or by
- collecting parts/windows on-the-fly from non-continous memory-images.
-
- If I change the image in the first version, I have to determine how
- to "back-fill" those areas distrubed by that change. I guess I do a
- bounds check to find anything that has a bounding-box that touched the
- changed area.
-
- In the second case, I just need to collect the pieces from somewhere
- else or change the piece.
-
- Thanks, both for your patience and responses.
-
- jck
- jck@garfield.ncat.edu
- 919-334-7549
-