RE: A83: an idea for greyscale
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RE: A83: an idea for greyscale
yea... but maybe we could change fastcopy so it only copies half the screen
or something. (As you can see, I'm very interested in greyscale on the
83+) That would probably be best for some simple greyscale game. My
original idea could be used in some sort of a picture viewer. The idea is
that it only displays the totally black and totally white bytes once, and
displays the grey once twice to make them grey. I dunno. Just a couple of
ideas from somebody that isn't good enough at asm (yet) to implement them
;-)
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Original Message
From: "Sebastiaan Roodenburg"<sebastiaan@rimsystems.nl>
Subject: RE: A83: an idea for greyscale
Date: Thu, 8 Feb 2001 23:33:35 +0100
>
>It would probably work, BUT, the framerate wouldn't be constant, which will
>cause inconstant scales of gray...
>
>
>> -----Oorspronkelijk bericht-----
>> Van: owner-assembly-83@lists.ticalc.org
>> [mailto:owner-assembly-83@lists.ticalc.org]Namens Joe Pemberton
>> Verzonden: donderdag 8 februari 2001 0:24
>> Aan: assembly-83@lists.ticalc.org
>> Onderwerp: A83: an idea for greyscale
>>
>>
>>
>> Would it be possible to write a routine much like fastcopy but for
>> greyscale if you made it write the first buffer to the LCD then
>> when it was
>> writing the second buffer it would compare the byte from the first buffer
>> with the current one from the second buffer and if they were the same it
>> wouldn't bother writing it? This would cut down on the use of lcdbusy
and
>> maybe even checking the bytes could replace lcdbusy in some parts, making
>> the entire routine faster. Does anyone think this might work?
>>
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