From: swarsmatt AT aol DOT com (SWars Matt)
Newsgroups: comp.os.msdos.djgpp
Subject: More help with Jlib needed
Date: 11 Jul 1997 21:29:30 GMT
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To: djgpp AT delorie DOT com
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I have another question about the Jlib graphics library.  When I use the
image_save_pcx function, the .pcx file I get is always totally blank, with
just one color.  I wrote the following little program because I was having
problems with buff_draw_point in a more complicated program, and still I
get a blank image.

#include <jlib.h>
#include <malloc.h>

main()
{
char file[9] = "test.pcx";

screen_set_video_mode();
buffer_rec *buff = buff_init(640, 480);
UBYTE *paldef = pal_get_default();
 
int i;
for(i = 0; i < 480; i++)
buff_draw_point(*buff, i, i, 100);

int c = image_save_pcx(file, buff, paldef);
screen_blit_fs_buffer(buff);
buff_free(buff);
screen_restore_video_mode();		 
free(paldef);
return 0; 
}

Also, how can I keep the image on the screen for a while without using a
'do-nothing' loop before screen_restore_video_mode?
I realize these are probably stupid questions, but I am fairly new to
programming in general and C++ in particular.
Thanks for your help.