| From: | Sami N��t�nen |
| Date: | 29 Sep 2000 at 07:52:59 |
| Subject: | Re: Scroll questions |
Daniel Dundelski wrote:
> Hello,
>
> I have a question.
> Are Blitz bitmaps limited to any sizes? Or I can create bitmap as big as I
> want? And then, does bitmap have to has the same size as a screen? Or I can
> open screen 640x256 and create bitmap ie. 1920x256 - tree times longer than
> the screen width?
> Next if I want to do screen scroll, which way (from Blitz's) is the best (max.
> fast and smooth). And if I scroll display, can I scroll only part of it (ie. I
> have bitmap 256 pixels height and I want scroll it only from 20th pixel to
> 200th. It is possible to do or I have to scroll it all??)
>
You can use wider bitmaps, but I'm not an expert about those OS scrolls, so I
don't know how, but AD's with includes should
point you in right direction. OS screen's can't scoll part's of screen
efficiently, but using blitter it can be done.
Display lib can scroll even independet scanlines if you want. This is made using
the custom copperlist instructions, but I have only done this using
independent asm program, so don't know how to do it using those custom cops.
---------------------------------------------------------------------
To unsubscribe, e-mail: blitz-list-unsubscribe@netsoc.ucd.ie
For additional commands, e-mail: blitz-list-help@netsoc.ucd.ie