| 1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)vplot.c 4.3 (Berkeley) %G%"; |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * Reads standard graphics input and produces a plot on the |
| 7 | * Varian or Versatec |
| 8 | */ |
| 9 | #include <stdio.h> |
| 10 | #include <signal.h> |
| 11 | #include <vfont.h> |
| 12 | |
| 13 | #define LPR "/usr/ucb/lpr" |
| 14 | |
| 15 | #define mapx(x) ((DevRange*((x)-botx)/del)+centx) |
| 16 | #define mapy(y) ((DevRange*(del-(y)+boty)/del)-centy) |
| 17 | #define SOLID -1 |
| 18 | #define DOTTED 014 |
| 19 | #define SHORTDASHED 034 |
| 20 | #define DOTDASHED 054 |
| 21 | #define LONGDASHED 074 |
| 22 | |
| 23 | char *Sid = "@(#)\t%G%"; |
| 24 | |
| 25 | int linmod = SOLID; |
| 26 | int done1; |
| 27 | char chrtab[][16]; |
| 28 | char *obuf; |
| 29 | int bufsize; |
| 30 | int lastx; |
| 31 | int lasty; |
| 32 | int radius, startx, starty, endx, endy; |
| 33 | double topx; |
| 34 | double topy; |
| 35 | double botx; |
| 36 | double boty; |
| 37 | int centx = 0; |
| 38 | int centy = 0; |
| 39 | double delx; |
| 40 | double dely; |
| 41 | double del; |
| 42 | |
| 43 | int warned = 0; /* Indicates whether the warning message about |
| 44 | * unimplemented routines has been printed */ |
| 45 | |
| 46 | FILE *infile; |
| 47 | FILE *pfp; /* output file */ |
| 48 | char picture[] = "/usr/tmp/rastAXXXXXX"; |
| 49 | int run = 13; /* index of 'a' in picture[] */ |
| 50 | int DevRange = 1536; /* output array size (square) in pixels */ |
| 51 | int DevRange8 = 1536/8; /* output array size in bytes */ |
| 52 | int BytesPerLine = 264; /* Bytes per raster line (physical) */ |
| 53 | int lparg = 7; /* index into lpargs */ |
| 54 | |
| 55 | char *lpargs[50] = { "lpr", "-Pvarian", "-v", "-s", "-r", "-J", "vplot" }; |
| 56 | |
| 57 | /* variables for used to print from font file */ |
| 58 | int fontSet = 0; /* Has the font file been read */ |
| 59 | struct header header; |
| 60 | struct dispatch dispatch[256]; |
| 61 | char *bits; |
| 62 | char *fontFile = "/usr/lib/vfont/R.6"; |
| 63 | |
| 64 | main(argc, argv) |
| 65 | int argc; |
| 66 | char **argv; |
| 67 | { |
| 68 | extern int cleanup(); |
| 69 | register char *cp1, *arg; |
| 70 | register i; |
| 71 | int again; |
| 72 | |
| 73 | infile = stdin; |
| 74 | while (argc > 1 && argv[1][0] == '-') { |
| 75 | argc--; |
| 76 | arg = *++argv; |
| 77 | switch (*++arg) { |
| 78 | case 'W': |
| 79 | DevRange = 2048; |
| 80 | DevRange8 = 2048/8; |
| 81 | BytesPerLine = 880; |
| 82 | lpargs[1] = "-Pversatec"; |
| 83 | break; |
| 84 | case 'V': |
| 85 | DevRange = 1536; |
| 86 | DevRange8 = 1536/8; |
| 87 | BytesPerLine = 264; |
| 88 | lpargs[1] = "-Pvarian"; |
| 89 | break; |
| 90 | case 'b': |
| 91 | if (argc-- > 1) |
| 92 | lpargs[lparg-1] = *++argv; |
| 93 | break; |
| 94 | default: |
| 95 | fprintf(stderr, "vplot: %s option unknown\n", *argv); |
| 96 | break; |
| 97 | } |
| 98 | } |
| 99 | if (argc > 1) { |
| 100 | if ((infile = fopen(*++argv, "r")) == NULL) { |
| 101 | perror(*argv); |
| 102 | cleanup(); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* init constants for scaling */ |
| 107 | topx = topy = DevRange; |
| 108 | botx = boty = 0; |
| 109 | delx = dely = del = DevRange; |
| 110 | centx = (DevRange - mapx(topx))/2; |
| 111 | centy = mapy(topy)/2; |
| 112 | signal(SIGTERM, cleanup); |
| 113 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 114 | signal(SIGINT, cleanup); |
| 115 | mktemp(picture); |
| 116 | if ((obuf = (char *) malloc(bufsize = DevRange * DevRange8)) == NULL) { |
| 117 | fprintf(stderr, "vplot: ran out of memory\n"); |
| 118 | cleanup(); |
| 119 | } |
| 120 | do { |
| 121 | if ((pfp = fopen(picture, "w")) == NULL) { |
| 122 | fprintf(stderr, "vplot: can't create %s\n", picture); |
| 123 | cleanup(); |
| 124 | } |
| 125 | i = strlen(picture) + 1; |
| 126 | if ((arg = (char *) malloc(i)) == NULL) { |
| 127 | fprintf(stderr, "ran out of memory\n"); |
| 128 | cleanup(); |
| 129 | } |
| 130 | strcpy(arg, picture); |
| 131 | lpargs[lparg++] = arg; |
| 132 | picture[run]++; |
| 133 | arg = &obuf[bufsize]; |
| 134 | for (cp1 = obuf; cp1 < arg; ) |
| 135 | *cp1++ = 0; |
| 136 | |
| 137 | again = getpict(); |
| 138 | |
| 139 | for (cp1 = obuf; cp1 < arg; cp1 += DevRange8) { |
| 140 | fwrite(cp1, sizeof(char), DevRange8, pfp); |
| 141 | fseek(pfp, (long) BytesPerLine - DevRange8, 1); |
| 142 | } |
| 143 | fclose(pfp); |
| 144 | } while (again); |
| 145 | lpargs[lparg] = 0; |
| 146 | execv(LPR, lpargs); |
| 147 | fprintf(stderr, "can't exec %s\n", LPR); |
| 148 | cleanup(); |
| 149 | } |
| 150 | |
| 151 | getpict() |
| 152 | { |
| 153 | register x1, y1; |
| 154 | |
| 155 | for (;;) switch (x1 = getc(infile)) { |
| 156 | |
| 157 | case '\n': |
| 158 | continue; |
| 159 | |
| 160 | case 's': |
| 161 | botx = getinteger(infile); |
| 162 | boty = getinteger(infile); |
| 163 | topx = getinteger(infile); |
| 164 | topy = getinteger(infile); |
| 165 | delx = topx-botx; |
| 166 | dely = topy-boty; |
| 167 | if (dely/delx > 1536./2048.) |
| 168 | del = dely; |
| 169 | else |
| 170 | del = delx; |
| 171 | centx = 0; |
| 172 | centx = (DevRange - mapx(topx))/2; |
| 173 | centy = 0; |
| 174 | centy = mapy(topy) / 2; |
| 175 | continue; |
| 176 | |
| 177 | case 'b': |
| 178 | x1 = getc(infile); |
| 179 | continue; |
| 180 | |
| 181 | case 'l': |
| 182 | done1 |= 01; |
| 183 | x1 = mapx(getinteger(infile)); |
| 184 | y1 = mapy(getinteger(infile)); |
| 185 | lastx = mapx(getinteger(infile)); |
| 186 | lasty = mapy(getinteger(infile)); |
| 187 | line(x1, y1, lastx, lasty); |
| 188 | continue; |
| 189 | |
| 190 | case 'c': |
| 191 | x1 = mapx(getinteger(infile)); |
| 192 | y1 = mapy(getinteger(infile)); |
| 193 | radius = mapx(getinteger(infile)); |
| 194 | if (!warned) { |
| 195 | fprintf(stderr,"Circles are Implemented\n"); |
| 196 | warned++; |
| 197 | } |
| 198 | circle(x1, y1, radius); |
| 199 | continue; |
| 200 | |
| 201 | case 'a': |
| 202 | x1 = mapx(getinteger(infile)); |
| 203 | y1 = mapy(getinteger(infile)); |
| 204 | startx = mapx(getinteger(infile)); |
| 205 | starty = mapy(getinteger(infile)); |
| 206 | endx = mapx(getinteger(infile)); |
| 207 | endy = mapy(getinteger(infile)); |
| 208 | if (!warned) { |
| 209 | fprintf(stderr,"Circles and Arcs are unimplemented\n"); |
| 210 | warned++; |
| 211 | } |
| 212 | continue; |
| 213 | |
| 214 | case 'm': |
| 215 | lastx = mapx(getinteger(infile)); |
| 216 | lasty = mapy(getinteger(infile)); |
| 217 | continue; |
| 218 | |
| 219 | case 't': |
| 220 | lastx = lastx - 6; |
| 221 | lasty = lasty + 6; |
| 222 | done1 |= 01; |
| 223 | while ((x1 = getc(infile)) != '\n') |
| 224 | plotch(x1); |
| 225 | continue; |
| 226 | |
| 227 | case 'e': |
| 228 | if (done1) |
| 229 | return(1); |
| 230 | continue; |
| 231 | |
| 232 | case 'p': |
| 233 | done1 |= 01; |
| 234 | lastx = mapx(getinteger(infile)); |
| 235 | lasty = mapy(getinteger(infile)); |
| 236 | point(lastx, lasty); |
| 237 | point(lastx+1, lasty); |
| 238 | point(lastx, lasty+1); |
| 239 | point(lastx+1, lasty+1); |
| 240 | continue; |
| 241 | |
| 242 | case 'n': |
| 243 | done1 |= 01; |
| 244 | x1 = mapx(getinteger(infile)); |
| 245 | y1 = mapy(getinteger(infile)); |
| 246 | line(lastx, lasty, x1, y1); |
| 247 | lastx = x1; |
| 248 | lasty = y1; |
| 249 | continue; |
| 250 | |
| 251 | case 'f': |
| 252 | getinteger(infile); |
| 253 | getc(infile); |
| 254 | switch (getc(infile)) { |
| 255 | case 't': |
| 256 | linmod = DOTTED; |
| 257 | break; |
| 258 | default: |
| 259 | case 'i': |
| 260 | linmod = SOLID; |
| 261 | break; |
| 262 | case 'g': |
| 263 | linmod = LONGDASHED; |
| 264 | break; |
| 265 | case 'r': |
| 266 | linmod = SHORTDASHED; |
| 267 | break; |
| 268 | case 'd': |
| 269 | linmod = DOTDASHED; |
| 270 | break; |
| 271 | } |
| 272 | while ((x1 = getc(infile)) != '\n') |
| 273 | if (x1 == EOF) |
| 274 | return(0); |
| 275 | continue; |
| 276 | |
| 277 | case 'd': |
| 278 | getinteger(infile); |
| 279 | getinteger(infile); |
| 280 | getinteger(infile); |
| 281 | x1 = getinteger(infile); |
| 282 | while (--x1 >= 0) |
| 283 | getinteger(infile); |
| 284 | continue; |
| 285 | |
| 286 | case 0: /* ignore null characters */ |
| 287 | continue; |
| 288 | |
| 289 | case 255: |
| 290 | case EOF: |
| 291 | return(0); |
| 292 | |
| 293 | default: |
| 294 | fprintf(stderr, "Input format error %c(%o)\n",x1,x1); |
| 295 | cleanup(); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | plotch(ch) |
| 300 | char ch; |
| 301 | { |
| 302 | register int i,j,k; |
| 303 | register char *ptr,c; |
| 304 | int nbytes; |
| 305 | |
| 306 | if (!fontSet) |
| 307 | InitFont(); /* Read font if not already read */ |
| 308 | |
| 309 | ptr = bits + dispatch[ch].addr; |
| 310 | |
| 311 | for (i = dispatch[ch].up; i > -dispatch[ch].down; --i) { |
| 312 | nbytes = (dispatch[ch].right + dispatch[ch].left + 7)/8; |
| 313 | for (j = 0; j < nbytes; j++) { |
| 314 | c = *ptr++; |
| 315 | for (k = 7; k >= 0; k--) |
| 316 | if ((c >> k) & 1) |
| 317 | point(lastx+7-k+j*8-dispatch[ch].left, lasty-i); |
| 318 | } |
| 319 | } |
| 320 | if (ch != ' ') |
| 321 | lastx += dispatch[ch].width; |
| 322 | else |
| 323 | lastx += dispatch['a'].width; |
| 324 | } |
| 325 | |
| 326 | InitFont() |
| 327 | { |
| 328 | char *s; |
| 329 | int fonts; |
| 330 | int i; |
| 331 | |
| 332 | fontSet = 1; |
| 333 | /* Get the font file */ |
| 334 | s = fontFile; |
| 335 | if ((fonts = open(s, 0)) == -1) { |
| 336 | perror(s); |
| 337 | fprintf(stderr, "Can't get font file"); |
| 338 | cleanup(); |
| 339 | } |
| 340 | /* Get the header and check magic number */ |
| 341 | if (read(fonts, &header, sizeof(header)) != sizeof(header)) { |
| 342 | perror(s); |
| 343 | fprintf(stderr, "Bad read in font file"); |
| 344 | cleanup(); |
| 345 | } |
| 346 | if (header.magic != 0436) { |
| 347 | fprintf(stderr,"Bad magic numer in font file"); |
| 348 | cleanup(); |
| 349 | } |
| 350 | /* Get dispatches */ |
| 351 | if (read(fonts, dispatch, sizeof(dispatch)) != sizeof(dispatch)) { |
| 352 | perror(s); |
| 353 | fprintf(stderr, "Bad read in font file"); |
| 354 | cleanup(); |
| 355 | } |
| 356 | /* Allocate space for bit map and read in bits */ |
| 357 | bits = (char *) malloc(header.size); |
| 358 | if (read(fonts, bits, header.size) != header.size) { |
| 359 | perror(s); |
| 360 | fprintf(stderr,"Can't read bit map in font file"); |
| 361 | cleanup(); |
| 362 | } |
| 363 | /* Close font file */ |
| 364 | if (close(fonts) != 0) { |
| 365 | perror(s); |
| 366 | fprintf(stderr,"Can't close font file"); |
| 367 | cleanup(); |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | line(x0, y0, x1, y1) |
| 372 | register x0, y0; |
| 373 | { |
| 374 | int dx, dy; |
| 375 | int xinc, yinc; |
| 376 | register res1; |
| 377 | int res2; |
| 378 | int slope; |
| 379 | |
| 380 | xinc = 1; |
| 381 | yinc = 1; |
| 382 | if ((dx = x1-x0) < 0) { |
| 383 | xinc = -1; |
| 384 | dx = -dx; |
| 385 | } |
| 386 | if ((dy = y1-y0) < 0) { |
| 387 | yinc = -1; |
| 388 | dy = -dy; |
| 389 | } |
| 390 | slope = xinc*yinc; |
| 391 | res1 = 0; |
| 392 | res2 = 0; |
| 393 | if (dx >= dy) while (x0 != x1) { |
| 394 | if ((x0+slope*y0) & linmod) |
| 395 | point(x0, y0); |
| 396 | if (res1 > res2) { |
| 397 | res2 += dx - res1; |
| 398 | res1 = 0; |
| 399 | y0 += yinc; |
| 400 | } |
| 401 | res1 += dy; |
| 402 | x0 += xinc; |
| 403 | } else while (y0 != y1) { |
| 404 | if ((x0+slope*y0) & linmod) |
| 405 | point(x0, y0); |
| 406 | if (res1 > res2) { |
| 407 | res2 += dy - res1; |
| 408 | res1 = 0; |
| 409 | x0 += xinc; |
| 410 | } |
| 411 | res1 += dx; |
| 412 | y0 += yinc; |
| 413 | } |
| 414 | if ((x1+slope*y1) & linmod) |
| 415 | point(x1, y1); |
| 416 | } |
| 417 | |
| 418 | #define labs(a) (a >= 0 ? a : -a) |
| 419 | |
| 420 | circle(x,y,c) |
| 421 | { |
| 422 | register dx, dy; |
| 423 | long ep; |
| 424 | int de; |
| 425 | |
| 426 | dx = 0; |
| 427 | ep = 0; |
| 428 | for (dy=c; dy>=dx; dy--) { |
| 429 | for (;;) { |
| 430 | point(x+dx, y+dy); |
| 431 | point(x-dx, y+dy); |
| 432 | point(x+dx, y-dy); |
| 433 | point(x-dx, y-dy); |
| 434 | point(x+dy, y+dx); |
| 435 | point(x-dy, y+dx); |
| 436 | point(x+dy, y-dx); |
| 437 | point(x-dy, y-dx); |
| 438 | ep += 2*dx + 1; |
| 439 | de = -2*dy + 1; |
| 440 | dx++; |
| 441 | if (labs(ep) >= labs(ep+de)) { |
| 442 | ep += de; |
| 443 | break; |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * Points should be in the range 0 <= x (or y) <= DevRange. |
| 451 | * The origin is the top left-hand corner with increasing x towards the |
| 452 | * right and increasing y going down. |
| 453 | */ |
| 454 | point(x, y) |
| 455 | register int x, y; |
| 456 | { |
| 457 | register unsigned byte; |
| 458 | |
| 459 | byte = y * DevRange8 + (x >> 3); |
| 460 | if (byte < bufsize) |
| 461 | obuf[byte] |= 1 << (7 - (x & 07)); |
| 462 | } |
| 463 | |
| 464 | cleanup() |
| 465 | { |
| 466 | while (picture[run] != 'a') { |
| 467 | unlink(picture); |
| 468 | picture[run]--; |
| 469 | } |
| 470 | exit(1); |
| 471 | } |
| 472 | |
| 473 | getinteger(f) |
| 474 | FILE *f; |
| 475 | { |
| 476 | register int low, high, result; |
| 477 | |
| 478 | low = getc(f); |
| 479 | high = getc(f); |
| 480 | result = ((high << 8) | low); |
| 481 | if (high > 127) |
| 482 | result |= ~0xffff; |
| 483 | return(result); |
| 484 | } |