Need help w/ SCROLLING

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2 total messages Started by Michael D Fischer Sat, 05 Jan 1991 06:37

#7831

Author: Michael D Fischer
Date: Sat, 05 Jan 1991 06:37

20 lines
1416 bytes

Help!  I'm trying to write a program that scrolls a text message
across the bottom of a 4 bitplane hires-interlaced screen, and what
I have been able to do is MUCH too slow!  I am using ScrollRaster()
of the graphics.library...  I rewrote the C program in assembly to
see if it would increase the speed much, and it didn't at all (I was
still calling ScrollRaster() from the asm program).

So, is there a faster way of scrolling a 30-pixel high horizontal
strip of the screen?  Any help would be GREATLY appreciated, even
just pointers to where I can get example source code...

Thanks in advance...

Michael

-- 
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-        Michael D. Fischer       |   greendog@max.physics.sunysb.edu   -
-      S.U.N.Y. at Stony Brook    |   mfische@csserv1.ic.sunysb.edu     -
-------------------------------------------------------------------------

Re: Need help w/ SCROLLING

#7888

Author: Jean-Michel Forgeas
Date: Sun, 06 Jan 1991 13:45

14 lines
1251 bytes

In article <1991Jan5.063714.25262@max.physics.sunysb.edu>, Michael D Fischer writes:

> Help!  I'm trying to write a program that scrolls a text message
> across the bottom of a 4 bitplane hires-interlaced screen, and what
> I have been able to do is MUCH too slow!  I am using ScrollRaster()

ScrollRaster() cares about RastPorts and layers, and if you don't
have windows on your screen you can use BltBitMap() directly.
--
                                     \___/
Jean-Michel Forgeas                   \-/
cbmvax!cbmehq!cbmfra!swinjm!forgeas    |    The Software Winery
                                      -^-
                           And, where is the universe ?

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