| 1 | /* |
| 2 | * Reads standard graphics input |
| 3 | * Makes a plot on a 200 dot-per-inch 11" wide |
| 4 | * Versatek plotter. |
| 5 | * |
| 6 | * Creates and leaves /usr/tmp/raster (1000 blocks) |
| 7 | * which is the bitmap |
| 8 | */ |
| 9 | #include "stdio.h" |
| 10 | #include <signal.h> |
| 11 | |
| 12 | #define NB 88 |
| 13 | #define BSIZ 512 |
| 14 | #define mapx(x) ((1536*((x)-botx)/del)+centx) |
| 15 | #define mapy(y) ((1536*(del-(y)+boty)/del)-centy) |
| 16 | #define SOLID -1 |
| 17 | #define DOTTED 014 |
| 18 | #define SHORTDASHED 034 |
| 19 | #define DOTDASHED 054 |
| 20 | #define LONGDASHED 074 |
| 21 | #define SETSTATE (('v'<<8)+1) |
| 22 | |
| 23 | int linmod = SOLID; |
| 24 | int again; |
| 25 | int done1; |
| 26 | char chrtab[][16]; |
| 27 | int plotcom[] = { 0200, 0, 0}; |
| 28 | int eotcom[] = { 0210, 0, 0}; |
| 29 | char blocks [NB][BSIZ]; |
| 30 | int obuf[264]; |
| 31 | int lastx; |
| 32 | int lasty; |
| 33 | double topx = 1536; |
| 34 | double topy = 1536; |
| 35 | double botx = 0; |
| 36 | double boty = 0; |
| 37 | int centx; |
| 38 | int centy; |
| 39 | double delx = 1536; |
| 40 | double dely = 1536; |
| 41 | double del = 1536; |
| 42 | |
| 43 | struct buf { |
| 44 | int bno; |
| 45 | char *block; |
| 46 | }; |
| 47 | struct buf bufs[NB]; |
| 48 | |
| 49 | int in, out; |
| 50 | char *picture = "/usr/tmp/raster"; |
| 51 | |
| 52 | main(argc, argv) |
| 53 | char **argv; |
| 54 | { |
| 55 | extern int onintr(); |
| 56 | register i; |
| 57 | |
| 58 | if (argc>1) { |
| 59 | in = open(argv[1], 0); |
| 60 | putpict(); |
| 61 | exit(0); |
| 62 | } |
| 63 | signal(SIGTERM, onintr); |
| 64 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
| 65 | signal(SIGINT, onintr); |
| 66 | another: |
| 67 | for (i=0; i<NB; i++) { |
| 68 | bufs[i].bno = -1; |
| 69 | bufs[i].block = blocks[i]; |
| 70 | } |
| 71 | out = creat(picture, 0666); |
| 72 | in = open(picture, 0); |
| 73 | zseek(out, 32*32); |
| 74 | write(out, blocks[0], BSIZ); |
| 75 | /*delete following code when filsys deals properly with |
| 76 | holes in files*/ |
| 77 | for(i=0;i<512;i++) |
| 78 | blocks[0][i] = 0; |
| 79 | zseek(out, 0); |
| 80 | for(i=0;i<32*32;i++) |
| 81 | write(out,blocks[0],512); |
| 82 | /**/ |
| 83 | getpict(); |
| 84 | for (i=0; i<NB; i++) |
| 85 | if (bufs[i].bno != -1) { |
| 86 | zseek(out, bufs[i].bno); |
| 87 | write(out, bufs[i].block, BSIZ); |
| 88 | } |
| 89 | putpict(); |
| 90 | if (again) { |
| 91 | close(in); |
| 92 | close(out); |
| 93 | goto another; |
| 94 | } |
| 95 | exit(0); |
| 96 | } |
| 97 | |
| 98 | getpict() |
| 99 | { |
| 100 | register x1, y1; |
| 101 | |
| 102 | again = 0; |
| 103 | for (;;) switch (x1 = getc(stdin)) { |
| 104 | |
| 105 | case 's': |
| 106 | botx = getw(stdin); |
| 107 | boty = getw(stdin); |
| 108 | topx = getw(stdin); |
| 109 | topy = getw(stdin); |
| 110 | delx = topx-botx; |
| 111 | dely = topy-boty; |
| 112 | if (dely/delx > 1536./2048.) |
| 113 | del = dely; |
| 114 | else |
| 115 | del = delx * (1566./2048.); |
| 116 | centx = 0; |
| 117 | centx = (2048 - mapx(topx)) / 2; |
| 118 | centy = 0; |
| 119 | centy = mapy(topy) / 2; |
| 120 | continue; |
| 121 | |
| 122 | case 'l': |
| 123 | done1 |= 01; |
| 124 | x1 = mapx(getw(stdin)); |
| 125 | y1 = mapy(getw(stdin)); |
| 126 | lastx = mapx(getw(stdin)); |
| 127 | lasty = mapy(getw(stdin)); |
| 128 | line(x1, y1, lastx, lasty); |
| 129 | continue; |
| 130 | |
| 131 | case 'm': |
| 132 | lastx = mapx(getw(stdin)); |
| 133 | lasty = mapy(getw(stdin)); |
| 134 | continue; |
| 135 | |
| 136 | case 't': |
| 137 | done1 |= 01; |
| 138 | while ((x1 = getc(stdin)) != '\n') |
| 139 | plotch(x1); |
| 140 | continue; |
| 141 | |
| 142 | case 'e': |
| 143 | if (done1) { |
| 144 | again++; |
| 145 | return; |
| 146 | } |
| 147 | continue; |
| 148 | |
| 149 | case 'p': |
| 150 | done1 |= 01; |
| 151 | lastx = mapx(getw(stdin)); |
| 152 | lasty = mapy(getw(stdin)); |
| 153 | point(lastx, lasty); |
| 154 | point(lastx+1, lasty); |
| 155 | point(lastx, lasty+1); |
| 156 | point(lastx+1, lasty+1); |
| 157 | continue; |
| 158 | |
| 159 | case 'n': |
| 160 | done1 |= 01; |
| 161 | x1 = mapx(getw(stdin)); |
| 162 | y1 = mapy(getw(stdin)); |
| 163 | line(lastx, lasty, x1, y1); |
| 164 | lastx = x1; |
| 165 | lasty = y1; |
| 166 | continue; |
| 167 | |
| 168 | case 'f': |
| 169 | getw(stdin); |
| 170 | getc(stdin); |
| 171 | switch(getc(stdin)) { |
| 172 | case 't': |
| 173 | linmod = DOTTED; |
| 174 | break; |
| 175 | default: |
| 176 | case 'i': |
| 177 | linmod = SOLID; |
| 178 | break; |
| 179 | case 'g': |
| 180 | linmod = LONGDASHED; |
| 181 | break; |
| 182 | case 'r': |
| 183 | linmod = SHORTDASHED; |
| 184 | break; |
| 185 | case 'd': |
| 186 | linmod = DOTDASHED; |
| 187 | break; |
| 188 | } |
| 189 | while((x1=getc(stdin))!='\n') |
| 190 | if(x1==-1) return; |
| 191 | continue; |
| 192 | |
| 193 | case 'd': |
| 194 | getw(stdin); |
| 195 | getw(stdin); |
| 196 | getw(stdin); |
| 197 | x1 = getw(stdin); |
| 198 | while (--x1 >= 0) |
| 199 | getw(stdin); |
| 200 | continue; |
| 201 | |
| 202 | case -1: |
| 203 | return; |
| 204 | |
| 205 | default: |
| 206 | printf("Botch\n"); |
| 207 | return; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | plotch(c) |
| 212 | register c; |
| 213 | { |
| 214 | register j; |
| 215 | register char *cp; |
| 216 | int i; |
| 217 | |
| 218 | if (c<' ' || c >0177) |
| 219 | return; |
| 220 | cp = chrtab[c-' ']; |
| 221 | for (i = -16; i<16; i += 2) { |
| 222 | c = *cp++; |
| 223 | for (j=7; j>=0; --j) |
| 224 | if ((c>>j)&1) { |
| 225 | point(lastx+6-j*2, lasty+i); |
| 226 | point(lastx+7-j*2, lasty+i); |
| 227 | point(lastx+6-j*2, lasty+i+1); |
| 228 | point(lastx+7-j*2, lasty+i+1); |
| 229 | } |
| 230 | } |
| 231 | lastx += 16; |
| 232 | } |
| 233 | |
| 234 | int f; /* versatec file number */ |
| 235 | putpict() |
| 236 | { |
| 237 | register x, *ip, *op; |
| 238 | int y; |
| 239 | |
| 240 | if (f==0){ |
| 241 | f = open("/dev/vp0", 1); |
| 242 | if (f < 0) { |
| 243 | printf("Cannot open vp\n"); |
| 244 | exit(1); |
| 245 | } |
| 246 | ioctl(f, SETSTATE, plotcom); |
| 247 | } |
| 248 | op = obuf; |
| 249 | lseek(in, 0L, 0); |
| 250 | for (y=0; y<2048; y++) { |
| 251 | if ((y&077) == 0) |
| 252 | read(in, blocks[0], 32*BSIZ); |
| 253 | for (x=0; x<32; x++) { |
| 254 | ip = (int *)&blocks[x][(y&077)<<3]; |
| 255 | *op++ = *ip++; |
| 256 | *op++ = *ip++; |
| 257 | *op++ = *ip++; |
| 258 | *op++ = *ip++; |
| 259 | } |
| 260 | *op++ = 0; |
| 261 | *op++ = 0; |
| 262 | *op++ = 0; |
| 263 | *op++ = 0; |
| 264 | if (y&1) { |
| 265 | write(f, (char *)obuf, sizeof(obuf)); |
| 266 | op = obuf; |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | line(x0, y0, x1, y1) |
| 272 | register x0, y0; |
| 273 | { |
| 274 | int dx, dy; |
| 275 | int xinc, yinc; |
| 276 | register res1; |
| 277 | int res2; |
| 278 | int slope; |
| 279 | |
| 280 | xinc = 1; |
| 281 | yinc = 1; |
| 282 | if ((dx = x1-x0) < 0) { |
| 283 | xinc = -1; |
| 284 | dx = -dx; |
| 285 | } |
| 286 | if ((dy = y1-y0) < 0) { |
| 287 | yinc = -1; |
| 288 | dy = -dy; |
| 289 | } |
| 290 | slope = xinc*yinc; |
| 291 | res1 = 0; |
| 292 | res2 = 0; |
| 293 | if (dx >= dy) while (x0 != x1) { |
| 294 | if((x0+slope*y0)&linmod) |
| 295 | if (((x0>>6) + ((y0&~077)>>1)) == bufs[0].bno) |
| 296 | bufs[0].block[((y0&077)<<3)+((x0>>3)&07)] |= 1 << (7-(x0&07)); |
| 297 | else |
| 298 | point(x0, y0); |
| 299 | if (res1 > res2) { |
| 300 | res2 += dx - res1; |
| 301 | res1 = 0; |
| 302 | y0 += yinc; |
| 303 | } |
| 304 | res1 += dy; |
| 305 | x0 += xinc; |
| 306 | } else while (y0 != y1) { |
| 307 | if((x0+slope*y0)&linmod) |
| 308 | if (((x0>>6) + ((y0&~077)>>1)) == bufs[0].bno) |
| 309 | bufs[0].block[((y0&077)<<3)+((x0>>3)&07)] |= 1 << (7-(x0&07)); |
| 310 | else |
| 311 | point(x0, y0); |
| 312 | if (res1 > res2) { |
| 313 | res2 += dy - res1; |
| 314 | res1 = 0; |
| 315 | x0 += xinc; |
| 316 | } |
| 317 | res1 += dx; |
| 318 | y0 += yinc; |
| 319 | } |
| 320 | if((x1+slope*y1)&linmod) |
| 321 | if (((x1>>6) + ((y1&~077)>>1)) == bufs[0].bno) |
| 322 | bufs[0].block[((y1&077)<<3)+((x1>>3)&07)] |= 1 << (7-(x1&07)); |
| 323 | else |
| 324 | point(x1, y1); |
| 325 | } |
| 326 | |
| 327 | point(x, y) |
| 328 | register x, y; |
| 329 | { |
| 330 | register bno; |
| 331 | |
| 332 | bno = ((x&03700)>>6) + ((y&03700)>>1); |
| 333 | if (bno != bufs[0].bno) { |
| 334 | if (bno < 0 || bno >= 1024) |
| 335 | return; |
| 336 | getblk(bno); |
| 337 | } |
| 338 | bufs[0].block[((y&077)<<3)+((x>>3)&07)] |= 1 << (7-(x&07)); |
| 339 | } |
| 340 | |
| 341 | getblk(b) |
| 342 | register b; |
| 343 | { |
| 344 | register struct buf *bp1, *bp2; |
| 345 | register char *tp; |
| 346 | |
| 347 | loop: |
| 348 | for (bp1 = bufs; bp1 < &bufs[NB]; bp1++) { |
| 349 | if (bp1->bno == b || bp1->bno == -1) { |
| 350 | tp = bp1->block; |
| 351 | for (bp2 = bp1; bp2>bufs; --bp2) { |
| 352 | bp2->bno = (bp2-1)->bno; |
| 353 | bp2->block = (bp2-1)->block; |
| 354 | } |
| 355 | bufs[0].bno = b; |
| 356 | bufs[0].block = tp; |
| 357 | return; |
| 358 | } |
| 359 | } |
| 360 | zseek(out, bufs[NB-1].bno); |
| 361 | write(out, bufs[NB-1].block, BSIZ); |
| 362 | zseek(in, b); |
| 363 | read(in, bufs[NB-1].block, BSIZ); |
| 364 | bufs[NB-1].bno = b; |
| 365 | goto loop; |
| 366 | } |
| 367 | |
| 368 | onintr() |
| 369 | { |
| 370 | exit(1); |
| 371 | } |
| 372 | |
| 373 | zseek(a, b) |
| 374 | { |
| 375 | return(lseek(a, (long)b*512, 0)); |
| 376 | } |