393 lines
8.9 KiB
C
393 lines
8.9 KiB
C
/*
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* Copyright (c) 1992, 1995 Hellmuth Michaelis
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*
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* Copyright (c) 1992, 1994 Brian Dunford-Shore
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by
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* Hellmuth Michaelis and Brian Dunford-Shore
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* 4. The name authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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static char *id =
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"@(#)loadfont.c, 3.31, Last Edit-Date: [Thu Aug 24 10:40:50 1995]";
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/*---------------------------------------------------------------------------*
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*
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* load a font into vga character font memory
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*
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* -hm removing explicit HGC support (same as MDA ..)
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* -hm new pcvt_ioctl.h SIZ_xxROWS
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* -hm add -d option
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* -hm patch from Joerg, -s scanlines option
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*
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*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <machine/pcvt_ioctl.h>
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struct screeninfo screeninfo;
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#define DEFAULTFD 0
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int fd;
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static int roundrows(int scrrow);
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static int codetosize(int code);
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static void setfont(int charset, int fontloaded, int charscan,
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int scrscan, int scrrow);
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static void loadfont(int fontset, int charscanlines,
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unsigned char *font_table);
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static void printvgafontattr(int charset);
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static void printheader(void);
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static void usage(void);
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main(int argc, char **argv)
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{
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extern int optind;
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extern int opterr;
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extern char *optarg;
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FILE *in;
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struct stat sbuf, *sbp;
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unsigned char *fonttab;
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int ret;
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int chr_height;
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int scr_scan;
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int scr_rows;
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int scan_lines = -1;
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int c;
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int chr_set = -1;
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char *filename;
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int fflag = -1;
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int info = -1;
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int dflag = 0;
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char *device;
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while( (c = getopt(argc, argv, "c:d:f:is:")) != EOF)
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{
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switch(c)
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{
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case 'c':
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chr_set = atoi(optarg);
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break;
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case 'd':
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device = optarg;
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dflag = 1;
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break;
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case 'f':
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filename = optarg;
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fflag = 1;
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break;
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case 'i':
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info = 1;
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break;
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case 's':
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scan_lines = atoi(optarg);
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if(scan_lines == 0)
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usage();
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break;
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case '?':
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default:
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usage();
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break;
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}
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}
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if(chr_set == -1 || fflag == -1)
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info = 1;
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if(dflag)
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{
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if((fd = open(device, O_RDWR)) == -1)
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{
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char buffer[80];
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strcpy(buffer,"ERROR opening ");
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strcat(buffer,device);
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perror(buffer);
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exit(1);
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}
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}
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else
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{
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fd = DEFAULTFD;
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}
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if(ioctl(fd, VGAGETSCREEN, &screeninfo) == -1)
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{
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perror("ioctl VGAGETSCREEN failed");
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exit(1);
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}
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if(info == 1)
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{
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int i;
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switch(screeninfo.adaptor_type)
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{
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case UNKNOWN_ADAPTOR:
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case MDA_ADAPTOR:
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case CGA_ADAPTOR:
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fprintf(stderr,
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"Adaptor does not support Downloadable Fonts!\n");
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break;
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case EGA_ADAPTOR:
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printheader();
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for(i = 0;i < 4;i++)
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{
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printvgafontattr(i);
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}
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break;
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case VGA_ADAPTOR:
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printheader();
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for(i = 0;i < 8;i++)
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{
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printvgafontattr(i);
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}
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}
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printf("\n");
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exit(0);
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}
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switch(screeninfo.adaptor_type)
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{
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case UNKNOWN_ADAPTOR:
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case MDA_ADAPTOR:
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case CGA_ADAPTOR:
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fprintf(stderr,
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"Adaptor does not support "
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"Downloadable Fonts!\n");
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exit(1);
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case EGA_ADAPTOR:
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if(scan_lines == -1) scan_lines = 350;
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else if(scan_lines != 350) {
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fprintf(stderr,
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"EGA adaptors can only operate with "
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"350 scan lines.\n");
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exit(1);
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}
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break;
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case VGA_ADAPTOR:
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if(scan_lines == -1) scan_lines = 400;
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else if(scan_lines != 400 && scan_lines != 480) {
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fprintf(stderr,
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"VGA adaptors can only operate with "
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"400/480 scan lines.\n");
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exit(1);
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}
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break;
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}
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if(chr_set < 0 || chr_set > 7)
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usage();
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sbp = &sbuf;
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if((in = fopen(filename, "r")) == NULL)
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{
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char buffer[80];
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sprintf(buffer, "cannot open file %s for reading", filename);
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perror(buffer);
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exit(1);
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}
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if((fstat(fileno(in), sbp)) != 0)
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{
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char buffer[80];
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sprintf(buffer, "cannot fstat file %s", filename);
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perror(buffer);
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exit(1);
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}
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chr_height = sbp->st_size / 256; /* 256 chars per font */
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if(chr_height * 256 != sbp->st_size ||
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chr_height < 8 || chr_height > 20) {
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fprintf(stderr,
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"File is no valid font file, size = %d.\n",
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sbp->st_size);
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exit(1);
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}
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scr_rows = codetosize(roundrows(scan_lines / chr_height));
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scr_scan = scr_rows * chr_height - 256 - 1;
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if((fonttab = (unsigned char *)malloc((size_t)sbp->st_size)) == NULL)
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{
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fprintf(stderr,"error, malloc failed\n");
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exit(1);
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}
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if((ret = fread(fonttab, sizeof(*fonttab), sbp->st_size, in)) !=
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sbp->st_size)
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{
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fprintf(stderr,
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"error reading file %s, size = %d, read = %d, "
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"errno %d\n",
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argv[1], sbp->st_size, ret, errno);
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exit(1);
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}
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loadfont(chr_set, chr_height, fonttab);
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setfont(chr_set, 1, chr_height - 1, scr_scan, scr_rows);
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exit(0);
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}
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static int
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roundrows(int scrrow)
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{
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if(scrrow >= 50) return SIZ_50ROWS;
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else if(scrrow >= 43) return SIZ_43ROWS;
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else if(scrrow >= 40) return SIZ_40ROWS;
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else if(scrrow >= 35) return SIZ_35ROWS;
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else if(scrrow >= 28) return SIZ_28ROWS;
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else return SIZ_25ROWS;
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}
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static int
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codetosize(int code)
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{
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static int sizetab[] = { 25, 28, 35, 40, 43, 50 };
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if(code < 0 || code >= sizeof sizetab / sizeof(int))
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return -1;
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return sizetab[code];
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}
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static void
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setfont(int charset, int fontloaded, int charscan, int scrscan, int scrrow)
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{
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struct vgafontattr vfattr;
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vfattr.character_set = charset;
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vfattr.font_loaded = fontloaded;
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vfattr.character_scanlines = charscan;
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vfattr.screen_scanlines = scrscan;
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vfattr.screen_size = scrrow;
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if(ioctl(fd, VGASETFONTATTR, &vfattr) == -1)
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{
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perror("loadfont - ioctl VGASETFONTATTR failed, error");
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exit(1);
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}
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}
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static void
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loadfont(int fontset, int charscanlines, unsigned char *font_table)
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{
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int i, j;
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struct vgaloadchar vlc;
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vlc.character_set = fontset;
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vlc.character_scanlines = charscanlines;
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for(i = 0; i < 256; i++)
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{
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vlc.character = i;
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for (j = 0; j < charscanlines; j++)
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{
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vlc.char_table[j] = font_table[j];
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}
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font_table += charscanlines;
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if(ioctl(fd, VGALOADCHAR, &vlc) == -1)
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{
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perror("loadfont - ioctl VGALOADCHAR failed, error");
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exit(1);
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}
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}
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}
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static void
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printvgafontattr(int charset)
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{
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struct vgafontattr vfattr;
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vfattr.character_set = charset;
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if(ioctl(fd, VGAGETFONTATTR, &vfattr) == -1)
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{
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perror("loadfont - ioctl VGAGETFONTATTR failed, error");
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exit(1);
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}
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printf(" %d ",charset);
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if(vfattr.font_loaded)
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{
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printf("Loaded ");
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printf(" %2.2d ", codetosize(vfattr.screen_size));
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printf(" %2.2d ",
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(((int)vfattr.character_scanlines) & 0x1f) + 1);
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printf(" %3.3d",
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((int)vfattr.screen_scanlines+0x101));
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}
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else
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{
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printf("Empty");
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}
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printf("\n");
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}
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static void
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printheader(void)
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{
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printf("\nEGA/VGA Charactersets Status Info:\n\n");
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printf("Set Status Lines CharScanLines ScreenScanLines\n");
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printf("--- ------ ----- ------------- ---------------\n");
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"\nloadfont - "
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"load a font into EGA/VGA font ram for the pcvt video driver\n");
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fprintf(stderr,
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"usage: loadfont -c <charset> -d <device> -f <filename>"
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" -i -s <scan_lines>\n");
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fprintf(stderr,
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" -c <charset> characterset to load (EGA 0..3, VGA 0..7)\n");
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fprintf(stderr,
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" -d <device> specify device\n");
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fprintf(stderr,
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" -f <filename> filename containing binary font data\n");
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fprintf(stderr,
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" -i print status and types of loaded fonts\n");
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fprintf(stderr,
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" -s <scan_lines> number of scan lines on screen\n");
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exit(2);
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}
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