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1.1 root 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: }
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