Re: A83: an idea for greyscale
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Re: A83: an idea for greyscale
no, I know that. But what I was saying was that by skipping the bytes that
were the same, you would have to write to the display controller much less.
I was just wondering if this would be enough for greyscale (like in picture
viewers or something)
Or maybe you could make a fastcopy routine that just writes a 48x32 size
picture. I'm sure that would be enough for greyscale (although it would be
1/4 the normal size)
----------------------------------------------
Original Message
From: "Harper Maddox"<gte172i@prism.gatech.edu>
Subject: Re: A83: an idea for greyscale
Date: Wed, 07 Feb 2001 07:06:49 -0500
>
>the problem is not the speed of the grayscale routine, it is the speed of
>the display controller.
>
>-harper
>
>At 05:24 PM 2/7/01 -0600, you wrote:
>
>>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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>
>
>
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