Message-ID:	<37D6C6F0.682D33AA@swipnet.se>
From:	Anders David Skarin <hobbit AT swipnet DOT se>
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Newsgroups:	comp.os.msdos.djgpp
Subject:	Does Allegro BLIT really convert between colordepths
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Date:	Wed, 08 Sep 1999 22:28:33 +0200
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Since vesa programming using DJGPP+NASM seems to be such
a struggle that even this newsgroup can answere my questions,
I have decided to let my "do it all" attitude go and give in
to the dark force... ALLEGRO.

There is one small thing i can't get over though... blit will
not (as the manual sas) convert between differnt colordepths.

Since my VESA routines used 32bit internaly, this is what I
wanted to do with ALLEGRO as well. But this code will produce
a GREEN screen rather than an ORANGE.

int main(void)
{
	allegro_init();

	BITMAP *test = create_bitmap_ex(32,320,240);

	destroy_bitmap(test);

	set_color_depth(16);
	if(set_gfx_mode(GFX_VESA2L,320,240,0,0)!=0)printf("sorry\n");

	for(int y =0; y<240; y++)
	for(int x =0; x<320; x++)
		putpixel(test,x,y,0x00FF5500);

	blit(test,screen,0,0,0,0,320,240);

	getch();

	allegro_exit();
	return 0;
};

Any suggestions?

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