4.3BSD - /usr/src/old/fcvt.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)fcvt.c	4.1	(Berkeley)	3/29/83";
   3: #endif not lint
   4: 
   5: /*
   6:  * Convert from the SAIL font format to the Unix font format.
   7:  * Usage: fcvt sailfile unixfile
   8:  */
   9: long left(), right();
  10: int sws;    /* sail word size in 36 bit words */
  11: char b[40000], u[2000];
  12: #include <stdio.h>
  13: #include <vfont.h>
  14: 
  15: struct header vheader;
  16: struct dispatch disptable[256];
  17: 
  18: long rightbits[19] = {
  19:     0,  1,  03, 07, 017,    037,
  20:     077,    0177,   0377,   0777,   01777,  03777,
  21:     07777,  017777, 037777, 077777, 0177777,0377777,0777777
  22: };
  23: 
  24: main(argc, argv)
  25: char **argv;
  26: {
  27:     int infd = open(argv[1], 0);
  28:     int outfd = creat(argv[2], 0666);
  29:     int n;
  30:     long lh, rh;
  31:     int base, nb, ncol, nleft, r, i;
  32:     int c, p;
  33:     /* Sail counters and things */
  34:     int height, maxwidth, baseline;
  35:     int charwidth, rastwidth, charcode, wordcount;
  36:     int leftkern, rowsfromtop, datarowcount;
  37:     /* Unix counters and things */
  38:     int rastrows, rastcols;
  39:     int curaddr;
  40:     int packed; /* true if sail packed format for this glyph */
  41:     int nperword;
  42: 
  43:     if (infd < 0 || outfd < 0) {
  44:         printf("Usage: fcvt sailfile unixfile\n");
  45:         exit(1);
  46:     }
  47:     n = read(infd, b, sizeof b);
  48:     sws = 2 * n / 9;
  49:     if (n == sizeof b) {
  50:         printf("Font larger than %d bytes - recompile me\n", n);
  51:         exit(1);
  52:     }
  53:     close(infd);
  54: 
  55:     height = right(0201);
  56:     maxwidth = right(0202);
  57:     baseline = right(0203);
  58: 
  59:     vheader.magic = 0436;
  60:     /* size gets done later */
  61:     vheader.maxx = height;
  62:     vheader.maxy = maxwidth;
  63:     /* I don't know what xtnd would map to */
  64: 
  65:     lseek(outfd, (long) sizeof vheader + sizeof disptable, 0);
  66:     curaddr = 0;
  67: 
  68:     /* Look at each char */
  69:     for (c=0; c<0200; c++) {
  70:         /* Find Sail info */
  71:         base = right(c);
  72:         if (base == 0)
  73:             continue;
  74:         charwidth = left(c);
  75:         rastwidth = (left(base) >> 9) & 0777;
  76:         if (rastwidth == 0)
  77:             rastwidth = charwidth;
  78:         charcode = left(base) & 0777;
  79:         if (charcode != c)
  80:             printf("bad char code %o(%c) != %o(%c)\n", charcode, charcode, c, c);
  81:         wordcount = right(base);
  82:         if (base+wordcount > sws) {
  83:             printf("Bad range %o-%o > %o glyph %o\n", base, base+wordcount, sws, c);
  84:             continue;
  85:         }
  86:         leftkern = (left(base+1) >> 9) & 0777;
  87:         rowsfromtop = left(base+1) & 0777;
  88:         datarowcount = right(base+1);
  89: 
  90:         rastrows = datarowcount;
  91:         rastcols = (rastwidth + 35) / 36 * 36;
  92: 
  93:         /* Unix disptable stuff */
  94:         disptable[c].addr = curaddr;
  95:         nb = rastrows * ((rastcols + 7) >> 3);
  96:         disptable[c].nbytes = nb;
  97:         curaddr += nb;
  98:         disptable[c].left = leftkern;
  99:         disptable[c].right = rastcols - leftkern;
 100:         disptable[c].up = baseline - rowsfromtop;
 101:         disptable[c].down = rastrows - disptable[c].up;
 102:         disptable[c].width = charwidth;
 103:         packed = (datarowcount > wordcount);
 104:         nperword = 36 / rastwidth;
 105: 
 106:         /* Now get the raster rows themselves */
 107:         p = 0;
 108:         ncol = rastcols / 36;
 109:         nleft = ((rastwidth-1) % 36 + 1);
 110:         base += 2;
 111:         for (r=0; r<rastrows; r++) {
 112:             if (!packed) {
 113:                 for (i=0; i<ncol; i++) {
 114:                     lh = left(base); rh = right(base++);
 115:                     /* compensate for garbage in SAIL fonts */
 116:                     if (i == ncol-1) {
 117:                         if (nleft <= 18) {
 118:                             rh = 0;
 119:                             lh &= ~rightbits[18-nleft];
 120:                         } else
 121:                             rh &= ~rightbits[36-nleft];
 122:                     }
 123:                     if (i%2) {
 124:                         u[p-1] |= (lh>>14) & 017;
 125:                         u[p++] = lh >> 6;
 126:                         u[p++] = ((lh&077)<<2) | ((rh>>16)&03);
 127:                         u[p++] = rh >> 8;
 128:                         u[p++] = rh;
 129:                     } else {
 130:                         u[p++] = lh >> 10;
 131:                         u[p++] = lh >> 2;
 132:                         u[p++] = ((lh&03)<<6) | (rh>>12);
 133:                         u[p++] = rh >> 4;
 134:                         u[p++] = (rh & 017) << 4;
 135:                     }
 136:                 }
 137:             } else {
 138:                 put(r % nperword, rastwidth, left(base+r/nperword), right(base+r/nperword), u+p);
 139:                 p += 5; /* 5 8 bit bytes per 36 bit word */
 140:             }
 141:         }
 142:         write(outfd, u, p);
 143:     }
 144:     lseek(outfd, 0, 0);
 145:     vheader.size = curaddr;
 146:     write(outfd, &vheader, sizeof vheader);
 147:     write(outfd, disptable, sizeof disptable);
 148:     close(outfd);
 149:     exit(0);
 150: }
 151: 
 152: /*
 153:  * put a pdp-10 style variable size byte into 8 bit Unix bytes starting
 154:  * at location dest.  The byte is bytesize bits, and is the bytenumth byte
 155:  * in the 36 bit word (lh,,rh).
 156:  */
 157: put(bytenum, bytesize, lh, rh, dest)
 158: int bytenum, bytesize;
 159: long lh, rh;
 160: char *dest;
 161: {
 162:     register int i;
 163: 
 164:     for (i=0; i<5; i++)
 165:         dest[i] = 0;
 166:     for (i=0; i<bytenum; i++) {
 167:         lh <<= bytesize;
 168:         lh |= (rh >> 18-bytesize) & rightbits[bytesize];
 169:         rh <<= bytesize;
 170:     }
 171:     lh &= ~rightbits[18-bytesize];
 172:     /* We now have the byte we want left justified in lh */
 173:     lh <<= 14;
 174:     /* lh is now the byte we want, left justified in 32 bit word */
 175:     for (i=0; i<bytesize; i += 8) {
 176:         *dest++ = (lh >> 24) & 0377;
 177:         lh <<= 8;
 178:     }
 179: }
 180: 
 181: /*
 182:  * Return the left half (18 bits) of pdp-10 word p.
 183:  */
 184: long
 185: left(p)
 186: int p;
 187: {
 188:     register int lp, odd;
 189:     register long retval;
 190: 
 191:     odd = p%2;
 192:     lp = 9*p/2;
 193:     if (p >= sws) {
 194:         return(0);
 195:     }
 196:     if (odd) {
 197:         retval  = (b[lp++] & 0017) << 14;
 198:         retval |= (b[lp++] & 0377) << 6;
 199:         retval |= (b[lp] >> 2) & 63;
 200:     } else {
 201:         retval  = (b[lp++] & 0377) << 10;
 202:         retval |= (b[lp++] & 0377) << 2;
 203:         retval |= (b[lp] >> 6) & 3;
 204:     }
 205:     return retval;
 206: }
 207: 
 208: /*
 209:  * Return the right half of 36 bit word #p.
 210:  */
 211: long
 212: right(p)
 213: int p;
 214: {
 215:     register int lp, odd;
 216:     register long retval;
 217: 
 218:     odd = p%2;
 219:     lp = 9*p/2 + 2;
 220:     if (p >= sws) {
 221:         return(0);
 222:     }
 223:     if (odd) {
 224:         retval  = (b[lp++] & 0003) << 16;
 225:         retval |= (b[lp++] & 0377) << 8;
 226:         retval |= (b[lp]   & 0377);
 227:     } else {
 228:         retval  = (b[lp++] & 0077) << 12;
 229:         retval |= (b[lp++] & 0377) << 4;
 230:         retval |= (b[lp] >> 4) & 017;
 231:     }
 232:     return retval;
 233: }

Defined functions

Defined variables