Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!mintaka!ogicse!milton!yoda.eecs.wsu.edu!pcooper
From: pcooper@eecs.wsu.edu (Phil Cooper - CS495)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Superbitmaps
Summary: Enlighten me!
Message-ID: <1991Mar26.091513.12469@eecs.wsu.edu>
Date: 26 Mar 91 09:15:13 GMT
Article-I.D.: eecs.1991Mar26.091513.12469
References: <1991Mar20.214447.7754@eecs.wsu.edu> <1991Mar21.185704.25773@sat.com>
Reply-To: pcooper@yoda.UUCP (Phil Cooper - CS495)
Organization: Washington State University, Pullman
Lines: 48

In article <1991Mar21.185704.25773@sat.com> farren@sat.com (Michael J. Farren) writes:
>pcooper@eecs.wsu.edu writes:
>>
>>Also, when the the superbitmap window is initially opened,
>>where is the display located on the superbitmap?
>
>Should be at 0,0, I would think.  
>

  That's right.  I checked it out today.  Too bad nothing in the RKM's
mention this.

>>I'm trying desperately to be intuition friendly, but scrolllayer() and
>>scrollraster() are pitifully, PITIFULLY slow.  Any suggestions?
>
>Well, you don't really need them, do you?  These routines actually move
>the pixel data around in memory, and the point of a superbitmap is that
>you can cause the screen to scroll by simply changing the offsets - no
>data need move.
>

  If I understand the RKM's examples, the entire superbitmap is scrolled
*underneath* the display.  You are not scrolling the display over the
superbitmap.  Besides being slow, the ScrollLayer() command flashes the
display while scrolling vertically.  It appears very jerky, and hardly
eye-appealing.

   Now, my question for the day:  Is it possible to have true fine scrolling
while running under intuition?  I want to use menus and gadgets, so I have
to remain Intuition-friendly.

>As for your LoadRGB4 problem, I haven't a clue - that routine has always
>worked as advertised for me.
>-- 

  I already found the problem.  Thanks anyway...

>+-----------------------------------------------------------------------+
>| Michael J. Farren                                      farren@sat.com |
>|                        He's moody, but he's cute.                     |
>+-----------------------------------------------------------------------+


-- 
/********************************************************************\
*   Real Life:   Phillip R. Cooper                                   *
*       Email:   pcooper@yoda.eecs.wsu.edu                           *
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