src/px/psign.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  psign.c - produce picture from text.
 *
 *      7/1/87
 */

#include  <stdio.h>

#include  "color.h"

#define  MAXLINE                512     /* longest allowable line */

char  *fontfile = "helvet.fnt";         /* our font file */

COLR  bgcolr = WHTCOLR;                 /* background color */
COLR  fgcolr = BLKCOLR;                 /* foreground color */

int  direct = 'r';                      /* direction (right, up, left, down) */

int  cheight = 32;                      /* character height */
double  aspect = 1.67;                  /* height/width character aspect */
int  cwidth;                            /* computed character width */

unsigned char  *ourbitmap;              /* our output bitmap */
int  xsiz, ysiz;                        /* bitmap dimensions */
int  xdim;                              /* size of horizontal scan (bytes) */

#define  bitop(x,y,op)          (ourbitmap[(y)*xdim+((x)>>3)] op (1<<((x)&7)))
#define  tstbit(x,y)            bitop(x,y,&)
#define  setbit(x,y)            bitop(x,y,|=)
#define  clrbit(x,y)            bitop(x,y,&=~)
#define  tglbit(x,y)            bitop(x,y,^=)

typedef unsigned char  GLYPH;

GLYPH  *ourfont[128];                   /* our font */

typedef struct line {
        char  *s;               /* line w/o LF */
        struct line  *next;     /* next line up */
} LINE;

LINE  *ourtext;                         /* our text */
int  nlines, maxline;                   /* text dimensions */

extern char  *malloc(), *calloc();
extern FILE  *fropen();


main(argc, argv)
int  argc;
char  *argv[];
{
        double  atof();
        int  an;

        for (an = 1; an < argc && argv[an][0] == '-'; an++)
                switch (argv[an][1]) {
                case 'c':                       /* color */
                        switch (argv[an][2]) {
                        case 'f':                       /* foreground */
                                setcolr(fgcolr, atof(argv[an+1]),
                                                atof(argv[an+2]),
                                                atof(argv[an+3]));
                                an += 3;
                                break;
                        case 'b':                       /* background */
                                setcolr(bgcolr, atof(argv[an+1]),
                                                atof(argv[an+2]),
                                                atof(argv[an+3]));
                                an += 3;
                                break;
                        default:
                                goto unkopt;
                        }
                        break;
                case 'f':                       /* font */
                        fontfile = argv[++an];
                        break;
                case 'd':                       /* direction */
                        switch (argv[an][2]) {
                        case 'r':                       /* right */
                        case 'u':                       /* up */
                        case 'l':                       /* left */
                        case 'd':                       /* down */
                                direct = argv[an][2];
                                break;
                        default:
                                goto unkopt;
                        }
                        break;
                case 'h':                       /* height of characters */
                        cheight = atoi(argv[++an]);
                        break;
                case 'a':                       /* aspect ratio */
                        aspect = atof(argv[++an]);
                        break;
                default:;
unkopt:
                        fprintf(stderr, "%s: unknown option: %s\n",
                                        argv[0], argv[an]);
                        exit(1);
                }
                                        /* get text */
        if (an == argc)
                gettext(stdin);
        else
                arg_text(argc-an, argv+an);

                                        /* create bit map */
        makemap();
                                        /* load font file */
        loadfont();
                                        /* convert text to bitmap */
        maptext();
                                        /* print header */
        printargs(argc, argv, stdout);
        fputformat(COLRFMT, stdout);
        putchar('\n');
                                        /* write out bitmap */
        writemap(stdout);

        exit(0);
}


makemap()                       /* create the bit map */
{
        cwidth = cheight/aspect + 0.5;
        if (direct == 'r' || direct == 'l') {
                xsiz = maxline*cwidth;
                ysiz = nlines*cheight;
        } else {                        /* reverse orientation */
                xsiz = nlines*cheight;
                ysiz = maxline*cwidth;
        }
        xdim = (xsiz+7)/8;
        ourbitmap = (BYTE *)calloc(ysiz, xdim);
        if (ourbitmap == NULL) {
                fprintf(stderr, "out of memory in makemap\n");
                exit(1);
        }
}


loadfont()                      /* load the font file */
{
        FILE  *fp;
        char  *err;
        int  gn, ngv, gv;
        register GLYPH  *g;

        if ((fp = fropen(fontfile)) == NULL) {
                fprintf(stderr, "cannot find font file \"%s\"\n",
                                fontfile);
                exit(1);
        }
        while (fscanf(fp, "%d", &gn) == 1) {    /* get each glyph */
                if (gn < 0 || gn > 127) {
                        err = "illegal";
                        goto fonterr;
                }
                if (ourfont[gn] != NULL) {
                        err = "duplicate";
                        goto fonterr;
                }
                if (fscanf(fp, "%d", &ngv) != 1 ||
                                ngv < 0 || ngv > 255) {
                        err = "bad # vertices for";
                        goto fonterr;
                }
                g = (GLYPH *)malloc((2*ngv+1)*sizeof(GLYPH));
                if (g == NULL)
                        goto memerr;
                ourfont[gn] = g;
                *g++ = ngv;
                ngv *= 2;
                while (ngv--) {
                        if (fscanf(fp, "%d", &gv) != 1 ||
                                        gv < 0 || gv > 255) {
                                err = "bad vertex for";
                                goto fonterr;
                        }
                        *g++ = gv;
                }
        }
        fclose(fp);
        return;
fonterr:
        fprintf(stderr, "%s character (%d) in font file \"%s\"\n",
                        err, gn, fontfile);
        exit(1);
memerr:
        fprintf(stderr, "out of memory in loadfont\n");
        exit(1);
}


gettext(fp)                     /* get text from a file */
FILE  *fp;
{
        char  *fgets();
        char  buf[MAXLINE];
        register LINE  *curl;
        int  len;

        maxline = 0;
        nlines = 0;
        while (fgets(buf, MAXLINE, fp) != NULL) {
                curl = (LINE *)malloc(sizeof(LINE));
                if (curl == NULL)
                        goto memerr;
                len = strlen(buf);
                curl->s = malloc(len--);
                if (curl->s == NULL)
                        goto memerr;
                strncpy(curl->s, buf, len);
                curl->s[len] = '\0';
                curl->next = ourtext;
                ourtext = curl;
                if (len > maxline)
                        maxline = len;
                nlines++;
        }
        return;
memerr:
        fprintf(stderr, "out of memory in gettext\n");
        exit(1);
}


arg_text(ac, av)                        /* get text from arguments */
int  ac;
char  *av[];
{
        register char  *cp;

        ourtext = (LINE *)malloc(sizeof(LINE));
        if (ourtext == NULL)
                goto memerr;
        ourtext->s = malloc(MAXLINE);
        if (ourtext->s == NULL)
                goto memerr;
        for (cp = ourtext->s; ac-- > 0; av++) {
                strcpy(cp, *av);
                cp += strlen(*av);
                *cp++ = ' ';
        }
        *--cp = '\0';
        ourtext->next = NULL;
        maxline = strlen(ourtext->s);
        nlines = 1;
        return;
memerr:
        fprintf(stderr, "out of memory in arg_text\n");
        exit(1);
}


maptext()                       /* map our text */
{
        register LINE  *curl;
        int  l;
        register int  c;

        for (l = 0, curl = ourtext; curl != NULL; l++, curl = curl->next)
                for (c = strlen(curl->s)-1; c >= 0; c--)
                        mapglyph(ourfont[curl->s[c]], c, l);
}


mapglyph(gl, tx0, ty0)          /* convert a glyph */
register GLYPH  *gl;
int  tx0, ty0;
{
        int  n;
        int  p0[2], p1[2];

        if (gl == NULL)
                return;

        tx0 <<= 8; ty0 <<= 8;
        n = *gl++;
        mapcoord(p0, gl[2*n-2]+tx0, gl[2*n-1]+ty0);
        while (n--) {
                mapcoord(p1, gl[0]+tx0, gl[1]+ty0);
                mapedge(p0[0], p0[1], p1[0]-p0[0], p1[1]-p0[1]);
                p0[0] = p1[0]; p0[1] = p1[1];
                gl += 2;
        }
}


mapcoord(p, tx, ty)             /* map text to picture coordinates */
int  p[2], tx, ty;
{
        tx = (long)tx*cwidth >> 8;
        ty = (long)ty*cheight >> 8;

        switch (direct) {
        case 'r':                       /* right */
                p[0] = tx;
                p[1] = ty;
                return;
        case 'u':                       /* up */
                p[0] = xsiz-1-ty;
                p[1] = tx;
                return;
        case 'l':                       /* left */
                p[0] = xsiz-1-tx;
                p[1] = ysiz-1-ty;
                return;
        case 'd':                       /* down */
                p[0] = ty;
                p[1] = ysiz-1-tx;
                return;
        }
}


mapedge(x, y, run, rise)                /* map an edge */
register int  x, y;
int  run, rise;
{
        int  xstep;
        int  rise2, run2;
        int  n;

        if (rise == 0)
                return;
                                                /* always draw up */
        if (rise < 0) {
                x += run;
                y += rise;
                rise = -rise;
                run = -run;
        }
        if (run < 0) {
                xstep = -1;
                run = -run;
        } else
                xstep = 1;
        n = rise;
        run2 = rise2 = 0;
        while (n)
                if (rise2 >= run2) {
                        tglbit(x, y);
                        n--;
                        y++;
                        run2 += run;
                } else {
                        x += xstep;
                        rise2 += rise;
                }
}


writemap(fp)                    /* write out bitmap */
FILE  *fp;
{
        COLR  *scanout;
        int  y;
        register int  x;
        register int  inglyph;

        fprintf(fp, "-Y %d +X %d\n", ysiz, xsiz);

        scanout = (COLR *)malloc(xsiz*sizeof(COLR));
        if (scanout == NULL) {
                fprintf(stderr, "out of memory in writemap\n");
                exit(1);
        }
        for (y = ysiz-1; y >= 0; y--) {
                inglyph = 0;
                for (x = 0; x < xsiz; x++) {
                        if (tstbit(x, y))
                                inglyph ^= 1;
                        if (inglyph)
                                copycolr(scanout[x], fgcolr);
                        else
                                copycolr(scanout[x], bgcolr);
                }
                if (fwritecolrs(scanout, xsiz, fp) < 0) {
                        fprintf(stderr, "write error in writemap\n");
                        exit(1);
                }
        }
        free((char *)scanout);
}
Revision:	2.1
Committed:	Tue Nov 12 16:04:19 1991 UTC (34 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+0 -0 lines
Log Message:	updated revision number for release 2.0
#	User	Rev	Content
1	greg	1.3	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* psign.c - produce picture from text.
9			*
10			* 7/1/87
11			*/
12
13			#include <stdio.h>
14
15			#include "color.h"
16
17			#define MAXLINE 512 /* longest allowable line */
18
19	greg	1.2	char fontfile = "helvet.fnt"; / our font file */
20	greg	1.1
21			COLR bgcolr = WHTCOLR; /* background color */
22			COLR fgcolr = BLKCOLR; /* foreground color */
23
24			int direct = 'r'; /* direction (right, up, left, down) */
25
26			int cheight = 32; /* character height */
27			double aspect = 1.67; /* height/width character aspect */
28			int cwidth; /* computed character width */
29
30			unsigned char ourbitmap; / our output bitmap */
31			int xsiz, ysiz; /* bitmap dimensions */
32			int xdim; /* size of horizontal scan (bytes) */
33
34			#define bitop(x,y,op) (ourbitmap[(y)*xdim+((x)>>3)] op (1<<((x)&7)))
35			#define tstbit(x,y) bitop(x,y,&)
36			#define setbit(x,y) bitop(x,y,\|=)
37			#define clrbit(x,y) bitop(x,y,&=~)
38			#define tglbit(x,y) bitop(x,y,^=)
39
40			typedef unsigned char GLYPH;
41
42			GLYPH ourfont[128]; / our font */
43
44			typedef struct line {
45			char s; / line w/o LF */
46			struct line next; / next line up */
47			} LINE;
48
49			LINE ourtext; / our text */
50			int nlines, maxline; /* text dimensions */
51
52	greg	1.2	extern char malloc(), calloc();
53			extern FILE *fropen();
54	greg	1.1
55
56			main(argc, argv)
57			int argc;
58			char *argv[];
59			{
60			double atof();
61			int an;
62
63			for (an = 1; an < argc && argv[an][0] == '-'; an++)
64			switch (argv[an][1]) {
65			case 'c': /* color */
66			switch (argv[an][2]) {
67			case 'f': /* foreground */
68			setcolr(fgcolr, atof(argv[an+1]),
69			atof(argv[an+2]),
70			atof(argv[an+3]));
71			an += 3;
72			break;
73			case 'b': /* background */
74			setcolr(bgcolr, atof(argv[an+1]),
75			atof(argv[an+2]),
76			atof(argv[an+3]));
77			an += 3;
78			break;
79			default:
80			goto unkopt;
81			}
82			break;
83			case 'f': /* font */
84			fontfile = argv[++an];
85			break;
86			case 'd': /* direction */
87			switch (argv[an][2]) {
88			case 'r': /* right */
89			case 'u': /* up */
90			case 'l': /* left */
91			case 'd': /* down */
92			direct = argv[an][2];
93			break;
94			default:
95			goto unkopt;
96			}
97			break;
98			case 'h': /* height of characters */
99			cheight = atoi(argv[++an]);
100			break;
101			case 'a': /* aspect ratio */
102			aspect = atof(argv[++an]);
103			break;
104			default:;
105			unkopt:
106			fprintf(stderr, "%s: unknown option: %s\n",
107			argv[0], argv[an]);
108			exit(1);
109			}
110			/* get text */
111			if (an == argc)
112			gettext(stdin);
113			else
114			arg_text(argc-an, argv+an);
115
116			/* create bit map */
117			makemap();
118			/* load font file */
119			loadfont();
120			/* convert text to bitmap */
121			maptext();
122			/* print header */
123			printargs(argc, argv, stdout);
124	greg	1.3	fputformat(COLRFMT, stdout);
125			putchar('\n');
126	greg	1.1	/* write out bitmap */
127			writemap(stdout);
128
129			exit(0);
130			}
131
132
133			makemap() /* create the bit map */
134			{
135			cwidth = cheight/aspect + 0.5;
136			if (direct == 'r' \|\| direct == 'l') {
137			xsiz = maxline*cwidth;
138			ysiz = nlines*cheight;
139			} else { /* reverse orientation */
140			xsiz = nlines*cheight;
141			ysiz = maxline*cwidth;
142			}
143			xdim = (xsiz+7)/8;
144			ourbitmap = (BYTE *)calloc(ysiz, xdim);
145			if (ourbitmap == NULL) {
146			fprintf(stderr, "out of memory in makemap\n");
147			exit(1);
148			}
149			}
150
151
152			loadfont() /* load the font file */
153			{
154			FILE *fp;
155			char *err;
156			int gn, ngv, gv;
157			register GLYPH *g;
158
159	greg	1.2	if ((fp = fropen(fontfile)) == NULL) {
160			fprintf(stderr, "cannot find font file \"%s\"\n",
161	greg	1.1	fontfile);
162			exit(1);
163			}
164			while (fscanf(fp, "%d", &gn) == 1) { /* get each glyph */
165			if (gn < 0 \|\| gn > 127) {
166			err = "illegal";
167			goto fonterr;
168			}
169			if (ourfont[gn] != NULL) {
170			err = "duplicate";
171			goto fonterr;
172			}
173			if (fscanf(fp, "%d", &ngv) != 1 \|\|
174			ngv < 0 \|\| ngv > 255) {
175			err = "bad # vertices for";
176			goto fonterr;
177			}
178			g = (GLYPH )malloc((2ngv+1)*sizeof(GLYPH));
179			if (g == NULL)
180			goto memerr;
181			ourfont[gn] = g;
182			*g++ = ngv;
183			ngv *= 2;
184			while (ngv--) {
185			if (fscanf(fp, "%d", &gv) != 1 \|\|
186			gv < 0 \|\| gv > 255) {
187			err = "bad vertex for";
188			goto fonterr;
189			}
190			*g++ = gv;
191			}
192			}
193			fclose(fp);
194			return;
195			fonterr:
196			fprintf(stderr, "%s character (%d) in font file \"%s\"\n",
197			err, gn, fontfile);
198			exit(1);
199			memerr:
200			fprintf(stderr, "out of memory in loadfont\n");
201			exit(1);
202			}
203
204
205			gettext(fp) /* get text from a file */
206			FILE *fp;
207			{
208			char *fgets();
209			char buf[MAXLINE];
210			register LINE *curl;
211			int len;
212
213			maxline = 0;
214			nlines = 0;
215			while (fgets(buf, MAXLINE, fp) != NULL) {
216			curl = (LINE *)malloc(sizeof(LINE));
217			if (curl == NULL)
218			goto memerr;
219			len = strlen(buf);
220			curl->s = malloc(len--);
221			if (curl->s == NULL)
222			goto memerr;
223			strncpy(curl->s, buf, len);
224			curl->s[len] = '\0';
225			curl->next = ourtext;
226			ourtext = curl;
227			if (len > maxline)
228			maxline = len;
229			nlines++;
230			}
231			return;
232			memerr:
233			fprintf(stderr, "out of memory in gettext\n");
234			exit(1);
235			}
236
237
238			arg_text(ac, av) /* get text from arguments */
239			int ac;
240			char *av[];
241			{
242			register char *cp;
243
244			ourtext = (LINE *)malloc(sizeof(LINE));
245			if (ourtext == NULL)
246			goto memerr;
247			ourtext->s = malloc(MAXLINE);
248			if (ourtext->s == NULL)
249			goto memerr;
250			for (cp = ourtext->s; ac-- > 0; av++) {
251			strcpy(cp, *av);
252			cp += strlen(*av);
253			*cp++ = ' ';
254			}
255			*--cp = '\0';
256			ourtext->next = NULL;
257			maxline = strlen(ourtext->s);
258			nlines = 1;
259			return;
260			memerr:
261			fprintf(stderr, "out of memory in arg_text\n");
262			exit(1);
263			}
264
265
266			maptext() /* map our text */
267			{
268			register LINE *curl;
269			int l;
270			register int c;
271
272			for (l = 0, curl = ourtext; curl != NULL; l++, curl = curl->next)
273			for (c = strlen(curl->s)-1; c >= 0; c--)
274			mapglyph(ourfont[curl->s[c]], c, l);
275			}
276
277
278			mapglyph(gl, tx0, ty0) /* convert a glyph */
279			register GLYPH *gl;
280			int tx0, ty0;
281			{
282			int n;
283			int p0[2], p1[2];
284
285			if (gl == NULL)
286			return;
287
288			tx0 <<= 8; ty0 <<= 8;
289			n = *gl++;
290			mapcoord(p0, gl[2n-2]+tx0, gl[2n-1]+ty0);
291			while (n--) {
292			mapcoord(p1, gl[0]+tx0, gl[1]+ty0);
293			mapedge(p0[0], p0[1], p1[0]-p0[0], p1[1]-p0[1]);
294			p0[0] = p1[0]; p0[1] = p1[1];
295			gl += 2;
296			}
297			}
298
299
300			mapcoord(p, tx, ty) /* map text to picture coordinates */
301			int p[2], tx, ty;
302			{
303			tx = (long)tx*cwidth >> 8;
304			ty = (long)ty*cheight >> 8;
305
306			switch (direct) {
307			case 'r': /* right */
308			p[0] = tx;
309			p[1] = ty;
310			return;
311			case 'u': /* up */
312			p[0] = xsiz-1-ty;
313			p[1] = tx;
314			return;
315			case 'l': /* left */
316			p[0] = xsiz-1-tx;
317			p[1] = ysiz-1-ty;
318			return;
319			case 'd': /* down */
320			p[0] = ty;
321			p[1] = ysiz-1-tx;
322			return;
323			}
324			}
325
326
327			mapedge(x, y, run, rise) /* map an edge */
328			register int x, y;
329			int run, rise;
330			{
331			int xstep;
332			int rise2, run2;
333			int n;
334
335			if (rise == 0)
336			return;
337			/* always draw up */
338			if (rise < 0) {
339			x += run;
340			y += rise;
341			rise = -rise;
342			run = -run;
343			}
344			if (run < 0) {
345			xstep = -1;
346			run = -run;
347			} else
348			xstep = 1;
349			n = rise;
350			run2 = rise2 = 0;
351			while (n)
352			if (rise2 >= run2) {
353			tglbit(x, y);
354			n--;
355			y++;
356			run2 += run;
357			} else {
358			x += xstep;
359			rise2 += rise;
360			}
361			}
362
363
364			writemap(fp) /* write out bitmap */
365			FILE *fp;
366			{
367			COLR *scanout;
368			int y;
369			register int x;
370			register int inglyph;
371
372			fprintf(fp, "-Y %d +X %d\n", ysiz, xsiz);
373
374			scanout = (COLR )malloc(xsizsizeof(COLR));
375			if (scanout == NULL) {
376			fprintf(stderr, "out of memory in writemap\n");
377			exit(1);
378			}
379			for (y = ysiz-1; y >= 0; y--) {
380			inglyph = 0;
381			for (x = 0; x < xsiz; x++) {
382			if (tstbit(x, y))
383			inglyph ^= 1;
384			if (inglyph)
385			copycolr(scanout[x], fgcolr);
386			else
387			copycolr(scanout[x], bgcolr);
388			}
389			if (fwritecolrs(scanout, xsiz, fp) < 0) {
390			fprintf(stderr, "write error in writemap\n");
391			exit(1);
392			}
393			}
394			free((char *)scanout);
395			}