From:	Meta <syzmik AT concentric DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Text in 0x101?
Date:	Sun, 24 Aug 1997 21:17:59 -0400
Organization:	Concentric Internet Services
Lines:	82
Message-ID:	<3400DD47.7725@concentric.net>
References:	<5tke8j$813$1 AT news1 DOT epix DOT net>
Reply-To:	syzmik AT concentric DOT net DOT NOSPAM
NNTP-Posting-Host:	ts019d07.sag-mi.concentric.net
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Avallone wrote:
>
> Is there a way to display black text on a white background in graphics 
> 0x101?

Here's some code, I can't remember where I found it. I think I never
used it because it wouldn't work with mem protection on our something.
Email me with a fix or somethin.

***************************************************************

#include <stdlib.h>

#include <dos.h>
#include <go32.h> 
#include <sys/nearptr.h>
#include <sys/farptr.h>

#include "vesag.h"

#define CHAR_WIDTH  8
#define CHAR_HEIGHT 8

char *rom_char_set = (char *)0xFFA6E;

void blit_char(int x, int y, int color, unsigned char c)
{
 int            offset, x2, y2;
 char          *work_char;
 unsigned char  bit_mask = 0x80;

 _farpokeb(_dos_ds, rom_char_set + c * CHAR_HEIGHT, work_char);

 offset = y * SCREEN_H + x;

 for(y2=0; y2<CHAR_HEIGHT; y2++)
 {
  bit_mask = 0x80;

  for(x2=0; x2<CHAR_WIDTH; x2++)
    {
     if((*work_char & bit_mask))
       VG_DB[offset+x2] = color;

     bit_mask = (bit_mask >> 1);
    }
  offset += SCREEN_W;
  work_char++;
 }
}


void blit_string(int x, int y, int color, char *string)
{
 int index;

 for(index=0; string[index] != 0; index++)
 {
  blit_char(x+(index<<3),y,color,string[index]);
 }
}

void main(void)
{
 unsigned count;

 rom_char_set += __djgpp_conventional_base;

 VG_InitGraph(VG_640x480);
 VG_InitDB();

 for(count = 0; count < 32000; count++)
 {
  blit_string(rand() % 296, rand() % 192, rand() % 256, "Hello");        
 }

 VG_ShowDB();
 delay(1500);
 VG_CloseGraph();

 return;
}

- Raw text -