1 #ifndef lint
2 static char sccsid[] = "@(#)vfontinfo.c	4.3 (Berkeley) 7/16/83";
3 #endif
4 
5 /* Font Information for VCat-style fonts
6  *      Andy Hertzfeld  4/79
7  *
8  *	Modified to print Ascii chars 1/80 by Mark Horton
9  *	Zoom option added 5/81 by Steve Stone with tables from Mark Horton.
10  *	Message option added 5/31 by Mark Horton
11  */
12 #include <stdio.h>
13 #include <ctype.h>
14 #include <vfont.h>
15 
16 struct header FontHeader;
17 struct dispatch disptable[256];
18 
19 char	IName[100];
20 char *	rdchar();
21 long	fbase;
22 
23 char	defascii[256];
24 char	*charswanted = defascii;
25 int	verbose;
26 char	charbits[4000];
27 int	H, W, WB, base;
28 int 	zoom = 1;
29 
30 char msgout[24][80];
31 int msgflag = 0;
32 int curline, curcol;	/* cursor, numbered from lower left corner */
33 int minline=24, maxline=0, maxcol=0;
34 
35 main(argc,argv)
36 int argc;
37 char **argv;
38 
39 {
40 	int FID,i,j;
41 
42 	while (argc > 1 && argv[1][0] == '-') {
43 		switch(argv[1][1]) {
44 		case 'v':
45 			verbose++;
46 			break;
47 		case 'z':
48 			zoom = argv[1][2] - '0';
49 			break;
50 		case 'm':
51 			msgflag = 1;
52 			zoom = 2;
53 			for (i=0; i<24; i++)
54 				for (j=0; j<80; j++)
55 					msgout[i][j] = ' ';
56 			curline = 5; curcol = 0;
57 			break;
58 		default:
59 			printf("Bad flag: %s\n", argv[1]);
60 		}
61 		argc--; argv++;
62 	}
63 	if (argc < 2) {
64 		fprintf(stderr,"Usage: %s filename", argv[0]);
65 		exit(2);
66 	}
67 
68 	for (i=0; i<128; i++)
69 		defascii[i] = i;
70 	if (argc >= 3)
71 		charswanted = argv[2];
72 
73 	sprintf(IName,"/usr/lib/vfont/%s",argv[1]);
74 	if ((FID = open(argv[1],0)) < 0)
75 		if ((FID = open(IName,0)) < 0) {
76 			printf("Can't find %s\n",argv[1]);
77 			exit(8);
78 		};
79 
80 	if (read(FID,&FontHeader,sizeof FontHeader) != sizeof FontHeader)
81 		error("Bad header in Font file.");
82 
83 	if (read(FID,&disptable[0],sizeof disptable) != sizeof disptable)
84 		error("Bad dispatch table in Font file");
85 
86 	fbase = sizeof FontHeader + sizeof disptable;
87 
88 	if (FontHeader.magic != 0436)
89 		printf("Magic number %o wrong\n", FontHeader.magic);
90 	if (!msgflag) {
91 		printf("Font %s, ",argv[1]);
92 		printf("raster size %d, ",FontHeader.size);
93 		printf("max width %d, max height %d, xtend %d\n",
94 			FontHeader.maxx, FontHeader.maxy,FontHeader.xtend);
95 		printf("\n");
96 		for (i = strlen(argv[1]) + 1; i > 0; --i)
97 			printf(" ");
98 		printf("ASCII     offset    size  left    right   up     down    width \n");
99 	}
100 
101 	for (i=0; i<256; i++) {
102 		j = charswanted[i];
103 		if (i>0 && j==0)
104 			break;
105 		if (disptable[j].nbytes != 0) {
106 			if (!msgflag)
107 				printf("%s  %3o %2s     %4d   %4d   %4d   %4d   %4d   %4d   %5d\n",
108 					argv[1],
109 					j, rdchar(j),
110 					disptable[j].addr,
111 					disptable[j].nbytes,
112 					disptable[j].left,
113 					disptable[j].right,
114 					disptable[j].up,
115 					disptable[j].down,
116 					disptable[j].width);
117 			if (verbose || msgflag) {
118 				int len = disptable[j].nbytes;
119 				int k, l, last;
120 
121 				lseek(FID, fbase+disptable[j].addr, 0);
122 				read(FID, charbits, len);
123 				H = (disptable[j].up) + (disptable[j].down);
124 				W = (disptable[j].left) + (disptable[j].right);
125 				base = disptable[j].up;
126 				WB = (W+7)/8;
127 				if (zoom < 0) {
128 					/*
129 					 * Old 1 for 1 code.  The aspect ratio
130 					 * is awful, so we don't use it.
131 					 */
132 					for (k=0; k<H; k++) {
133 						for (last=W-1; last >= 0; last--)
134 							if (fbit(k, last))
135 								break;
136 						for (l=0; l<=W-1; l++) {
137 							printf("%c", fbit(k,l)?'M':' ');
138 						}
139 						printf("\n");
140 					}
141 					printf("\n");
142 				} else {
143 					shozoom();
144 					if (msgflag) {
145 						k = disptable[j].width;
146 						if (zoom == 0) k *= 2;
147 						else if (zoom == 2) k /= 2;
148 						curcol += k;
149 					}
150 				}
151 			}
152 		}
153 	}
154 	if (msgflag) {
155 		for (i=maxline; i>=minline; i--) {
156 			for (j=0; j<maxcol; j++)
157 				putchar(msgout[i][j]);
158 			putchar('\n');
159 		}
160 	}
161 }
162 
163 error(string)
164 char *string;
165 
166 {
167 	printf("\nvfontinfo: %s\n",string);
168 	exit(8);
169 };
170 
171 char *rdchar(c)
172 char c;
173 {
174 	static char ret[3];
175 	ret[0] = isprint(c) ? ' ' : '^';
176 	ret[1] = isprint(c) ?  c  : c^0100;
177 	ret[2] = 0;
178 	return (ret);
179 }
180 
181 int
182 fbit(row, col)
183 int row, col;
184 {
185 	int thisbyte, thisbit, ret;
186 
187 	if (row<0 || row>=H || col>=W) return(0);
188 	thisbyte = charbits[row*WB + (col>>3)] & 0xff;
189 	thisbit = 0x80 >> (col&7);
190 	ret = thisbyte & thisbit;
191 	return (ret != 0);
192 }
193 
194 
195 /*
196 The implementation would work like this:
197 	zoom level	method
198 	0		2 chars/pixel, 1 is "[]", 0 is "  ".
199 	1		2 pixels/char 2x1, using " " "," "'" "|"
200 	2		8 pixels/char 4x2, using 16x16 table
201 	3		32 pixels/char 8x4, mapped into (2)
202 	4 and up	similar, mapped into (2)
203 
204 The 16x16 table maps a 4x2 pattern into a printing ascii character which
205 most closely approximates that pattern, e.g. the pattern
206 	|'
207 	''
208 would be represented by the character "[".  I have such a table worked out.
209 
210 Grainer zoom levels would take the rule of reducing it into a smaller bitmap,
211 or-ing the bits together.  (e.g. level 3 would take a 2x2 chunk and map it
212 into a single pixel: 0 if all 4 are 0, 1 otherwise.)  These pixels would be
213 displayed as in 2.
214 */
215 
216 /*
217  * graphtab: a table for rudimentary graphics on ordinary terminals.
218  * For each 4x2 bit pattern of the form:
219  *	ae
220  *	bf
221  *	cg
222  *	dh
223  * form the 4 bit quantities abcd and efgh and get table entry
224  *	graphtab[abcd][efgh]
225  * to display in that character position.
226  *
227  * General philosophies: the dh bits are intended for descenders where
228  * possible.  Characters with radically different appearance on different
229  * terminals (e.g. _ and ^) are avoided.
230  *
231  * Version 1.0, March 1981, Mark Horton.
232  */
233 
234 char tab1[4] = {
235 	' ', ',', '\'', '|'
236 };
237 
238 char graphtab[16][16] = {
239 ' ', '.', '.', ',', '.', ';', ':', 'j', '\'', ':', ':', ';', '\'', ';', '!', '|',
240 '.', '.', ':', ',', ';', ';', ';', 'j', '/', ';', ';', ';', 'j', 'j', 'j', 'j',
241 '.', ',', '~', ',', 'r', '<', 'j', 'q', '/', ';', 'I', ';', '/', '|', 'I', '|',
242 ',', ',', 'r', 'x', '/', '/', '/', 'd', '/', '/', '/', 'd', '/', '/', '/', 'd',
243 '.', ':', '\\', ';', '-', '=', 'v', 'q', '\'', ':', '<', '|', '\'', ':', '+', '+',
244 ';', ';', '>', ';', '=', '=', 'g', 'g', '\'', ':', 'S', 'S', '/', '/', '/', '+',
245 ':', '\\', '\\', '\\', 'r', '<', 'w', 'q', '/', '<', '6', '4', '/', '/', 'd', '+',
246 'l', 'L', '+', 'b', 'y', '[', 'p', 'g', '/', '<', '/', '6', '/', '/', '/', '+',
247 '`', ':', ':', ';', '`', '\\', '\\', '\\', '"', ':', ':', ';', '`', '\\', 'Y', 'T',
248 ';', ';', ';', ';', '`', '2', '>', '\\', ':', '=', ';', ';', '?', '?', ']', ']',
249 ':', ';', ';', ';', '>', '2', '>', '\\', 'F', ';', 'O', ';', '7', '?', ']', '7',
250 ';', ';', ';', ';', '?', '2', '>', 'b', ';', ';', ';', ';', '?', '?', ']', '#',
251 '\'', '\\', '\\', '\\', '`', '\\', '\\', '\\', '\'', '\'', '<', '5', '"', '"', 'v', 'q',
252 ';', '\\', '\\', '\\', '`', '=', '\\', '\\', '\'', '\'', '5', '5', '"', '?', 'g', 'g',
253 'I', 'L', 'L', 'L', 'D', '\\', 'b', 'f', 'F', '[', '[', '[', 'P', '?', '#', 'M',
254 '|', '|', '|', '|', '|', '#', '+', '#', 'T', '[', 'F', 'F', 'P', '?', 'P', 'M'
255 };
256 
257 
258 shozoom()
259 {
260 	register i;
261 
262 	if (zoom == 0)
263 		sho0();
264 	else if (zoom == 1)
265 		sho1();
266 	else if (zoom == 2)
267 		sho2();
268 }
269 
270 sho0()
271 {
272 	register k,l;
273 
274 	for (k=0; k<H; k++) {
275 		for (l=0; l<W; l++)
276 			printf("%s", fbit(k,l)?"[]": "  ");
277 		printf("\n");
278 	}
279 	printf("\n");
280 }
281 
282 sho1()
283 {
284 	register k,l;
285 
286 	k = 0;
287 	for (k = 0; k <= H; k += 2) {
288 		for(l=0;l<W;l++) putchar(tab1[(fbit(k,l) << 1) | fbit(k+1,l)]);
289 		putchar('\n');
290 	}
291 	putchar('\n');
292 }
293 
294 sho2()
295 {
296 	register i,j,k,l;
297 	int line = curline + (base+3)/4;
298 	int col;
299 
300 	k = base%4;
301 	if (k > 0) k -= 4;
302 	while (k < H) {
303 		l = 0;
304 		col = curcol;
305 		while (l<W) {
306 			i = fbit(k,l)*8 + fbit(k+1,l)*4 +
307 			    fbit(k+2,l)*2 + fbit(k+3,l);
308 			l++;
309 			j = fbit(k,l)*8 + fbit(k+1,l)*4 +
310 			    fbit(k+2,l)*2 + fbit(k+3,l);
311 
312 			if (msgflag) {
313 				if (graphtab[i][j] != ' ') {
314 					if (line > maxline) maxline = line;
315 					if (line < minline) minline = line;
316 					if (col > maxcol)   maxcol  = col;
317 				}
318 				msgout[line][col] = graphtab[i][j];
319 			} else
320 				printf("%c",graphtab[i][j]);
321 			l++;
322 			col++;
323 		}
324 		if (msgflag == 0)
325 			printf("\n");
326 		k += 4;
327 		line--;
328 	}
329 	if (msgflag == 0)
330 		printf("\n");
331 }
332