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Cream of the Crop 1
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PROGRAM
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RIE104.ARJ
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RIE-4.EXE
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ICONLOAD.C
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C/C++ Source or Header
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1992-02-20
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6KB
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145 lines
/*┌────────────────────────────────────────┐
│ ICONLOAD - Example of loading an icon │
│ to a VGA display. │
│ │
│ Copyright (C) 1992 by Rimrock Software │
│ All rights reserved. │
│ │
│ Compiled with Borland C++, version 3.0 │
│ │
│ NOTE: no attempt is made to determine │
│ display adapter type. Do not attempt │
│ to run this program unless you have an │
│ VGA display. │
└────────────────────────────────────────┘*/
#include <stdio.h>
#include <conio.h>
#include <dos.h>
#include <string.h>
#define LINES *((unsigned char far *) 0x00000485)
/* LINES is a pointer to a BIOS RAM variable that contains */
/* the current number of bytes it takes to make up a dis- */
/* play character. We use this value to adjust the icon */
/* size as it is read in, so the icon is correctly displayed*/
/* no matter what display font is being used. */
/*┌──────────────────────────────────────┐
│ Load an icon into the display adapter│
└──────────────────────────────────────┘*/
void load_icon(unsigned char *chr, unsigned char_num)
{
struct REGPACK r;
int i;
r.r_es = FP_SEG(chr);
r.r_bp = FP_OFF(chr); /* character address in ES:BP */
r.r_bx = LINES << 8; /* bytes per char in BH, 0 in BL */
r.r_cx = 8; /* number of chars to load */
r.r_dx = char_num; /* which char will be loaded (0-255) */
r.r_ax = 0x1100; /* function 11h, subfunction 00h */
intr(0x10,&r); /* go load the character */
}
/*┌──────────────────────────────────────┐
│ Display an icon generated with the │
│ Rimrock Icon Editor │
└──────────────────────────────────────┘*/
void main(int argc, char *argv[])
{
FILE *fptr; /* file pointer */
unsigned char icon_array[256]; /* icon storage */
char s[81]; /* file storage */
int i; /* index variable */
int start;
if(argc != 2) /* check for command line argument */
{
puts("\nSyntax:\n\n LOADICON filename.ext\n\n");
puts("filename.ext is an icon file generated by RIE.\n\n");
exit(1);
}
if((fptr = fopen(argv[1],"r")) == NULL) /* attempt to open the file */
{
printf("Can't open %s.\007\n",argv[1]);
exit(2);
}
for(i=0; ; i++) /* gobble up junk lines */
{
fgets(s,80,fptr);
if(strstr(s,"IcnT") == NULL) /* look for a start to the icon */
{
if(i >= 11) /* tried long enough. bail out */
{
printf("\n%s is not an icon file.\007\n",argv[1]);
exit(3);
}
}
else
break; /* found the start of the data */
}
memset(icon_array, 0, 256);
start = ((LINES * 8) - 64) / 4;
fscanf(fptr,"\n");
for(i=start; i<start+8; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 1 (0-7) */
fscanf(fptr,"\n");
for( ; i<start+16; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 2 (8-15) */
fscanf(fptr,"\n");
for( ; i<start+24; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 3 (16-23) */
fscanf(fptr,"\n");
for( ; i<start+32; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 4 (24-31) */
fscanf(fptr,"\n");
start += ((LINES * 8) / 2);
for(i = start; i<start+8; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 5 (32-39) */
fscanf(fptr,"\n");
for( ; i<start+16; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 6 (40-47) */
fscanf(fptr,"\n");
for( ; i<start+24; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 7 (48-55) */
fscanf(fptr,"\n");
for( ; i<start+31; i++)
fscanf(fptr,"0x%x,",&icon_array[i]); /* read line 8 (56-62) */
fscanf(fptr,"0x%x",&icon_array[i]); /* read line 8 (63) */
fclose(fptr); /* close the file */
/* An icon is composed of characters from the upper 128 characters */
/* of the display set, arranged in a 2 x 4 matrix: */
/* 1st 5th */
/* 2nd 6th */
/* 3rd 7th */
/* 4th 8th */
/* When displaying an icon, this is exactly how you would do it. */
/* (See SAMPLE.TXT for an example of laying out an icon in text.) */
/* Characters 192-223 (0xc0-0xdf) of the display set are special. */
/* In this range, the rightmost bits of each character is */
/* duplicated as a 9th bit. The purpose of this is to allow you */
/* to create things with these characters and not have any breaks */
/* in what you've created. For instance, when you draw a box, the */
/* box will consist of continuous lines. Since our icon consists */
/* of characters that are meant to be continuous, characters 1 */
/* through 4 MUST be in the range of 192-223. Characters 5 */
/* through 8 MUST NOT be in this range. For this reason, we have */
/* chosen characters 220-223 for 1-4 and 224-227 for 5-8. This */
/* makes them easy to load, since you can load all 8 at once. */
/* To verify proper loading, run the EXAMPLE.BAT file */
load_icon(icon_array,0xdc);
exit(0); /* and that's it, folks. */
}