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/* Copyright (c) 1987 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* psign.c - produce picture from text. |
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* |
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* 7/1/87 |
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*/ |
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|
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#include <stdio.h> |
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|
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#include "color.h" |
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|
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#define MAXLINE 512 /* longest allowable line */ |
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|
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char *fontfile = "/usr/local/lib/ray/helvet.fnt"; /* our font file */ |
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|
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COLR bgcolr = WHTCOLR; /* background color */ |
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COLR fgcolr = BLKCOLR; /* foreground color */ |
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|
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int direct = 'r'; /* direction (right, up, left, down) */ |
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|
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int cheight = 32; /* character height */ |
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double aspect = 1.67; /* height/width character aspect */ |
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int cwidth; /* computed character width */ |
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|
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unsigned char *ourbitmap; /* our output bitmap */ |
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int xsiz, ysiz; /* bitmap dimensions */ |
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int xdim; /* size of horizontal scan (bytes) */ |
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|
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#define bitop(x,y,op) (ourbitmap[(y)*xdim+((x)>>3)] op (1<<((x)&7))) |
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#define tstbit(x,y) bitop(x,y,&) |
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#define setbit(x,y) bitop(x,y,|=) |
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#define clrbit(x,y) bitop(x,y,&=~) |
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#define tglbit(x,y) bitop(x,y,^=) |
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|
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typedef unsigned char GLYPH; |
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|
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GLYPH *ourfont[128]; /* our font */ |
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|
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typedef struct line { |
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char *s; /* line w/o LF */ |
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struct line *next; /* next line up */ |
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} LINE; |
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|
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LINE *ourtext; /* our text */ |
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int nlines, maxline; /* text dimensions */ |
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|
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char *malloc(), *calloc(); |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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double atof(); |
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int an; |
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|
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for (an = 1; an < argc && argv[an][0] == '-'; an++) |
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switch (argv[an][1]) { |
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case 'c': /* color */ |
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switch (argv[an][2]) { |
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case 'f': /* foreground */ |
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setcolr(fgcolr, atof(argv[an+1]), |
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atof(argv[an+2]), |
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atof(argv[an+3])); |
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an += 3; |
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break; |
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case 'b': /* background */ |
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setcolr(bgcolr, atof(argv[an+1]), |
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atof(argv[an+2]), |
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atof(argv[an+3])); |
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an += 3; |
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break; |
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default: |
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goto unkopt; |
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} |
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break; |
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case 'f': /* font */ |
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fontfile = argv[++an]; |
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break; |
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case 'd': /* direction */ |
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switch (argv[an][2]) { |
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case 'r': /* right */ |
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case 'u': /* up */ |
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case 'l': /* left */ |
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case 'd': /* down */ |
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direct = argv[an][2]; |
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break; |
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default: |
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goto unkopt; |
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} |
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break; |
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case 'h': /* height of characters */ |
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cheight = atoi(argv[++an]); |
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break; |
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case 'a': /* aspect ratio */ |
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aspect = atof(argv[++an]); |
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break; |
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default:; |
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unkopt: |
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fprintf(stderr, "%s: unknown option: %s\n", |
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argv[0], argv[an]); |
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exit(1); |
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} |
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/* get text */ |
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if (an == argc) |
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gettext(stdin); |
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else |
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arg_text(argc-an, argv+an); |
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|
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/* create bit map */ |
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makemap(); |
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/* load font file */ |
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loadfont(); |
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/* convert text to bitmap */ |
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maptext(); |
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/* print header */ |
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printargs(argc, argv, stdout); |
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printf("\n\n"); |
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/* write out bitmap */ |
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writemap(stdout); |
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|
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exit(0); |
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} |
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|
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|
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makemap() /* create the bit map */ |
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{ |
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cwidth = cheight/aspect + 0.5; |
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if (direct == 'r' || direct == 'l') { |
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xsiz = maxline*cwidth; |
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ysiz = nlines*cheight; |
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} else { /* reverse orientation */ |
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xsiz = nlines*cheight; |
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ysiz = maxline*cwidth; |
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} |
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xdim = (xsiz+7)/8; |
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ourbitmap = (BYTE *)calloc(ysiz, xdim); |
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if (ourbitmap == NULL) { |
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fprintf(stderr, "out of memory in makemap\n"); |
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exit(1); |
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} |
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} |
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|
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|
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loadfont() /* load the font file */ |
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{ |
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FILE *fp; |
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char *err; |
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int gn, ngv, gv; |
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register GLYPH *g; |
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|
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if ((fp = fopen(fontfile, "r")) == NULL) { |
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fprintf(stderr, "cannot open font file \"%s\"\n", |
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fontfile); |
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exit(1); |
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} |
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while (fscanf(fp, "%d", &gn) == 1) { /* get each glyph */ |
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if (gn < 0 || gn > 127) { |
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err = "illegal"; |
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goto fonterr; |
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} |
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if (ourfont[gn] != NULL) { |
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err = "duplicate"; |
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goto fonterr; |
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} |
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if (fscanf(fp, "%d", &ngv) != 1 || |
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ngv < 0 || ngv > 255) { |
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err = "bad # vertices for"; |
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goto fonterr; |
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} |
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g = (GLYPH *)malloc((2*ngv+1)*sizeof(GLYPH)); |
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if (g == NULL) |
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goto memerr; |
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ourfont[gn] = g; |
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*g++ = ngv; |
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ngv *= 2; |
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while (ngv--) { |
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if (fscanf(fp, "%d", &gv) != 1 || |
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gv < 0 || gv > 255) { |
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err = "bad vertex for"; |
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goto fonterr; |
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} |
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*g++ = gv; |
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} |
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} |
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fclose(fp); |
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return; |
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fonterr: |
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fprintf(stderr, "%s character (%d) in font file \"%s\"\n", |
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err, gn, fontfile); |
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exit(1); |
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memerr: |
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fprintf(stderr, "out of memory in loadfont\n"); |
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exit(1); |
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} |
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|
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|
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gettext(fp) /* get text from a file */ |
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FILE *fp; |
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{ |
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char *fgets(); |
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char buf[MAXLINE]; |
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register LINE *curl; |
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int len; |
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|
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maxline = 0; |
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nlines = 0; |
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while (fgets(buf, MAXLINE, fp) != NULL) { |
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curl = (LINE *)malloc(sizeof(LINE)); |
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if (curl == NULL) |
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goto memerr; |
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len = strlen(buf); |
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curl->s = malloc(len--); |
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if (curl->s == NULL) |
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goto memerr; |
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strncpy(curl->s, buf, len); |
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curl->s[len] = '\0'; |
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curl->next = ourtext; |
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ourtext = curl; |
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if (len > maxline) |
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maxline = len; |
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nlines++; |
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} |
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return; |
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memerr: |
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fprintf(stderr, "out of memory in gettext\n"); |
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exit(1); |
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} |
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|
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|
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arg_text(ac, av) /* get text from arguments */ |
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int ac; |
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char *av[]; |
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{ |
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register char *cp; |
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|
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ourtext = (LINE *)malloc(sizeof(LINE)); |
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if (ourtext == NULL) |
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goto memerr; |
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ourtext->s = malloc(MAXLINE); |
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if (ourtext->s == NULL) |
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goto memerr; |
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for (cp = ourtext->s; ac-- > 0; av++) { |
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strcpy(cp, *av); |
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cp += strlen(*av); |
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*cp++ = ' '; |
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} |
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*--cp = '\0'; |
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ourtext->next = NULL; |
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maxline = strlen(ourtext->s); |
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nlines = 1; |
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return; |
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memerr: |
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fprintf(stderr, "out of memory in arg_text\n"); |
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exit(1); |
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} |
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|
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|
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maptext() /* map our text */ |
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{ |
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register LINE *curl; |
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int l; |
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register int c; |
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|
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for (l = 0, curl = ourtext; curl != NULL; l++, curl = curl->next) |
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for (c = strlen(curl->s)-1; c >= 0; c--) |
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mapglyph(ourfont[curl->s[c]], c, l); |
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} |
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|
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|
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mapglyph(gl, tx0, ty0) /* convert a glyph */ |
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register GLYPH *gl; |
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int tx0, ty0; |
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{ |
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int n; |
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int p0[2], p1[2]; |
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|
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if (gl == NULL) |
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return; |
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|
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tx0 <<= 8; ty0 <<= 8; |
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n = *gl++; |
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mapcoord(p0, gl[2*n-2]+tx0, gl[2*n-1]+ty0); |
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while (n--) { |
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mapcoord(p1, gl[0]+tx0, gl[1]+ty0); |
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mapedge(p0[0], p0[1], p1[0]-p0[0], p1[1]-p0[1]); |
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p0[0] = p1[0]; p0[1] = p1[1]; |
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gl += 2; |
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} |
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} |
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|
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|
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mapcoord(p, tx, ty) /* map text to picture coordinates */ |
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int p[2], tx, ty; |
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{ |
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tx = (long)tx*cwidth >> 8; |
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ty = (long)ty*cheight >> 8; |
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|
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switch (direct) { |
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case 'r': /* right */ |
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p[0] = tx; |
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p[1] = ty; |
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return; |
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case 'u': /* up */ |
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p[0] = xsiz-1-ty; |
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p[1] = tx; |
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return; |
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case 'l': /* left */ |
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p[0] = xsiz-1-tx; |
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p[1] = ysiz-1-ty; |
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return; |
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case 'd': /* down */ |
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p[0] = ty; |
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p[1] = ysiz-1-tx; |
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return; |
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} |
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} |
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|
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|
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mapedge(x, y, run, rise) /* map an edge */ |
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register int x, y; |
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int run, rise; |
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{ |
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int xstep; |
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int rise2, run2; |
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int n; |
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|
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if (rise == 0) |
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return; |
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/* always draw up */ |
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if (rise < 0) { |
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x += run; |
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y += rise; |
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rise = -rise; |
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run = -run; |
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} |
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if (run < 0) { |
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xstep = -1; |
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run = -run; |
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} else |
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xstep = 1; |
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n = rise; |
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run2 = rise2 = 0; |
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while (n) |
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if (rise2 >= run2) { |
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tglbit(x, y); |
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n--; |
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y++; |
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run2 += run; |
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} else { |
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x += xstep; |
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rise2 += rise; |
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} |
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} |
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|
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|
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writemap(fp) /* write out bitmap */ |
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FILE *fp; |
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{ |
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COLR *scanout; |
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int y; |
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register int x; |
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register int inglyph; |
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|
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fprintf(fp, "-Y %d +X %d\n", ysiz, xsiz); |
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|
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scanout = (COLR *)malloc(xsiz*sizeof(COLR)); |
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if (scanout == NULL) { |
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fprintf(stderr, "out of memory in writemap\n"); |
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exit(1); |
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} |
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for (y = ysiz-1; y >= 0; y--) { |
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inglyph = 0; |
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for (x = 0; x < xsiz; x++) { |
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if (tstbit(x, y)) |
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inglyph ^= 1; |
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if (inglyph) |
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copycolr(scanout[x], fgcolr); |
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else |
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copycolr(scanout[x], bgcolr); |
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} |
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if (fwritecolrs(scanout, xsiz, fp) < 0) { |
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fprintf(stderr, "write error in writemap\n"); |
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exit(1); |
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} |
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} |
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free((char *)scanout); |
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} |
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|
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|
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printargs(ac, av, fp) /* print arguments to a file */ |
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int ac; |
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char **av; |
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FILE *fp; |
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{ |
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while (ac-- > 0) { |
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fputs(*av++, fp); |
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putc(' ', fp); |
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} |
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} |
