Path: 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


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       |