Re: A83: Greyscale Help

To: assembly-83@lists.ticalc.org
Subject: Re: A83: Greyscale Help
From: Richard Harper Maddox <gte172i@prism.gatech.edu>
Date: Mon, 12 Jun 2000 02:46:50 -0400 (EDT)
In-Reply-To: <20000612044434.14559.qmail@hotmail.com>
Reply-To: assembly-83@lists.ticalc.org

i'd like to reply "Look Harder", but i am a nice guy.

this information is readily available on www.ticalc.org
search for "grayscale"
or look in 82,83,85,86 asm / misc or graphics directories for grayscale.

to answer your question, grayscale is best accomplished by maintaing
multiple graph buffers and displaying them on top of each other in a timed
pattern that is done by the interrupts.  for four level grayscale, 4
colors, you would have 2 buffers, the graph_buffer and the apd_buffer, and
you would display one buffer, wait a few interrupts, then display the next
buffer on top of the previous, then you would clear the graph buffer and
do it over again.

-harper

On Sun, 11 Jun 2000, John Doe wrote:

> 
> How exactly do you do greyscale?  I know that you have to flip white and 
> black but how would I do that?  I can't find any documents or source code or 
> tutorials on this so could somebody help me?
> 
> Thanks,
>         Phlu
> ________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
> 
> 
>

References:

A83: Greyscale Help

From: "John Doe" <phlu00@hotmail.com>