Mail Archives: djgpp/2000/03/03/04:16:47
| From: | Damian Yerrick <DONT DOT YOU DOT DAREd_yerrick AT hotmail DOT comSEND DOT SPAM>
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| Newsgroups: | comp.os.msdos.djgpp
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| Subject: | Re: allegro and StdVGA 640x480x16, how ?
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| Organization: | Pin Eight Software http://pineight.8m.com/
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| Message-ID: | <ikhubs069mml9cn03fff20b03pf0v710g9@4ax.com>
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| References: | <89lu5e$gcf$1 AT bagan DOT srce DOT hr>
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| NNTP-Posting-Date: | Fri, 03 Mar 2000 05:12:03 GMT
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| Distribution: | world
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| Date: | Fri, 03 Mar 2000 05:12:03 GMT
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| To: | djgpp AT delorie DOT com
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| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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| Reply-To: | djgpp AT delorie DOT com
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On Thu, 2 Mar 2000 15:26:43 +0100, "Tihomir Heidelberg"
<9a4gl AT 9a0tcp DOT ampr DOT org> wrote:
>Is it possible to use 640x480 16 color graphic resolution with
>standard VGA driver (not VESA) with Allegro ?
No. Allegro works only in packed-pixel modes, namely 8-bit,
15/16-bit, 24-bit, and 32-bit modes. Sixteen-color mode is
four overlayed monochrome bitmaps; you may need to delve into
GRX or write your own library. Look for EGA graphics manuals
for more information, as 16-color works exactly as on EGA.
>It seems that it works up to 320x200 with standard VGA driver.
BTW, have you tried mode X in 320x400? Looks cool.
You can even show an authentic Windows 9x splash screen:
void Show9xBoot(void)
{
PALETTE pal;
BITMAP *bmp = load_bitmap("c:\logo.sys", pal);
if(bmp == NULL)
return;
set_palette(pal);
blit(bmp, screen, 0, 0, 0, 0, 320, 400);
destroy_bitmap(bmp);
}
--
Damian Yerrick http://yerricde.tripod.com/
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