Article View: comp.sys.amiga.tech
Article #2376Fast Scrolling
From: Sean Lamont
Date: Tue, 28 Nov 1989 23:09
Date: Tue, 28 Nov 1989 23:09
25 lines
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1390 bytes
This is a repost, since nobody wanted to answer my question.
I am trying to do horizontal smooth scrolling. I have tried two methods,
one using SCROLLRASTPORT and one using SCROLLVPORT.
Problems I want to solve:
1) I can't GET SCROLLVPORT to work at all!!! I gave it the VPORT record
of my screen, but it did nothing. I've tried this in several
vport environments.
2) It's TOO SLOW! A SCROLLRASTPORT takes far too much time to scroll
anything of any substance. (like a 400 x 200 5-plane bitmap) I know
it's possible to move bitmaps much faster (for example, Screen sizing)
How would one go about making a FAST scroll?
Thanks in advance.
--
| Sean T. Lamont | |
|University of Washington | "Wave upon wave of demented avengers |
|ZENO@milton.acs.washington.edu| march cheerfull y out of obscurity |
| Savery hall, room 135. | into the dream"- P. Floyd |
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!milton!zeno From: zeno@milton.acs.washington.edu (Sean Lamont) Newsgroups: comp.sys.amiga.tech Subject: Fast Scrolling Message-ID: <762@milton.acs.washington.edu> Date: 28 Nov 89 23:09:33 GMT Reply-To: zeno@milton.acs.washington.edu (Sean Lamont) Distribution: usa Organization: University of Washington, Seattle Lines: 25