Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!ginosko!uunet!mcsun!sunic!tut!ra!chyde!ts
From: ts@chyde.uwasa.fi (Timo Salmi LASK)
Newsgroups: comp.lang.pascal
Subject: Re: Moving graphic images on screen
Message-ID: <844@chyde.uwasa.fi>
Date: 10 Oct 89 14:00:48 GMT
References: <21086@adm.BRL.MIL>
Reply-To: ts@chyde.uwasa.fi (Timo Salmi LASK)
Organization: U of Vaasa, Finland
Lines: 25

In article <21086@adm.BRL.MIL> KROON@tops20.radc.af.mil writes:
>I am writing a simulation program.  In the simulation I need to display a 
>horizontal readout.  I want the display to scroll from right to left after
>one screen fills up.  
>	Currently this happens, but the graphics refresh rate is too slow
>to look good.  The first pass is written to the screen with outtext lines
>which fill from left to right.  Next I use getimage and put image to move
>the graphics already on the screen.  Getimage and putimage are too darn
>slow.  I am using a vga screen in 640x480.  I would like to use some other

   I have tackled a somewhat similar problem, but in the *textmode*. 
In other words I have written routines that scroll the text on the
screen from left to right (or vice versa).  Image-type procedures,
as you say, are too slow.  I managed to solve my problem without any
inline code by applying move on videomemory, but I cannot say
offhand whether this method would applicable in the graphics mode,
at all. 
   But, if you have any use for the textmode left-right scroll, it
is available as a tpu unit in /pc/ts/tspas13.arc.  The source is not
included, though. 

...................................................................
Prof. Timo Salmi                                (Site 128.214.12.3)
School of Business Studies, University of Vaasa, SF-65101, Finland
Internet: ts@chyde.uwasa.fi Funet: vakk::salmi Bitnet: salmi@finfun