From: Damian Yerrick <MYNAMEISd_yerrick AT hotmail DOT comNO2CANNEDHAM>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: ALLEGRO: Fast Palette Changing
Organization: Pin Eight Software <http://pineight.8m.com/>
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References: <38834DB9 DOT C92B4DC8 AT tiscalinet DOT it>
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NNTP-Posting-Date: Mon, 17 Jan 2000 21:33:23 GMT
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Date: Mon, 17 Jan 2000 21:33:23 GMT
To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Night Walker <night DOT walker AT tiscalinet DOT it> wrote in message
<38834DB9 DOT C92B4DC8 AT tiscalinet DOT it>...
>I must switch between palette tables quite fast: i must draw 8bpp
>RLE_SPRITE on a truecolor screen, and each sprite has different palette.

Or you could cache them in memory as truecolor before you draw them.
That would be faster.

>I messed around with Allegro SRC but I found set_pallete() quite
>confusing.
>Passing entire arrays (the PALLETE type) by value as function parameters
>is not slow/unefficent? or are they automatically passed by reference?
>There is a way to simply redirect a pointer to a PALLETE table, thus
>changing palette with only an assignement "="?
>This will let me use blender maps/funx for transparency?
>How can I learn to use them (about this topic  ALLEGRO.TXT is not very
>clear for a newbie)

PALETTE is defined as an array of RGB.
Functions that take a PALETTE actually take RGB *, which can be
accessed much the same way.

PALETTE pal;

// fill the palette somehow, then
set_palette(pal);

-- 
Damian Yerrick  http://yerricde.tripod.com/
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