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/* Copyright (c) 1991 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 "standard.h" |
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|
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#include "color.h" |
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|
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#include "font.h" |
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|
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#ifndef SSS |
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#define SSS 3 /* super-sample size */ |
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#endif |
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|
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#define MAXLINE 512 /* longest allowable line */ |
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|
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#ifndef DEFPATH |
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#define DEFPATH ":/usr/local/lib/ray" |
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#endif |
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#ifndef ULIBVAR |
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#define ULIBVAR "RAYPATH" |
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#endif |
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|
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char *fontfile = "helvet.fnt"; /* our font file */ |
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|
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COLOR bgcolor = WHTCOLOR; /* background color */ |
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COLOR fgcolor = BLKCOLOR; /* 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*SSS; /* 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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FONT *ourfont; /* our font */ |
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|
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char *libpath; /* library search path */ |
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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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short *sp; /* character spacing */ |
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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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int maxwidth; /* maximum line width (dvi) */ |
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|
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extern char *getenv(); |
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extern 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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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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setcolor(fgcolor, 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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setcolor(bgcolor, 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])*SSS; |
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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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/* load font file */ |
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if ((libpath = getenv(ULIBVAR)) == NULL) |
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libpath = DEFPATH; |
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ourfont = getfont(fontfile); |
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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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/* 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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fputformat(COLRFMT, stdout); |
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putchar('\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 = (long)maxwidth*cwidth >> 8; |
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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 = (long)maxwidth*cwidth >> 8; |
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} |
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if (xsiz % SSS) |
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xsiz += SSS - xsiz%SSS; |
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if (ysiz % SSS) |
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ysiz += SSS - ysiz%SSS; |
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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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error(SYSTEM, "Out of memory in makemap"); |
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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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maxwidth = 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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curl->sp = (short *)malloc(sizeof(short)*len--); |
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if (curl->s == NULL | curl->sp == NULL) |
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goto memerr; |
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if (len > maxline) |
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maxline = len; |
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strncpy(curl->s, buf, len); |
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curl->s[len] = '\0'; |
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len = uniftext(curl->sp, curl->s, ourfont); |
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if (len > maxwidth) |
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maxwidth = len; |
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curl->next = ourtext; |
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ourtext = curl; |
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nlines++; |
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} |
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return; |
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memerr: |
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error(SYSTEM, "Out of memory in gettext"); |
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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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ourtext->sp = (short *)malloc(sizeof(short)*(maxline+1)); |
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if (ourtext->sp == NULL) |
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goto memerr; |
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maxwidth = squeeztext(ourtext->sp, ourtext->s, ourfont, 50); |
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nlines = 1; |
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return; |
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memerr: |
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error(SYSTEM, "Out of memory in arg_text"); |
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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, len; |
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register int i, c; |
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|
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for (l = 0, curl = ourtext; curl != NULL; l += 256, curl = curl->next) { |
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len = strlen(curl->s); c = 0; |
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for (i = 0; i < len; i++) { |
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c += curl->sp[i]; |
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mapglyph(ourfont->fg[curl->s[i]&0xff], c, l); |
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} |
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} |
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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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GLYPH *gl; |
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int tx0, ty0; |
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{ |
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int n; |
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register GORD *gp; |
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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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n = gl->nverts; |
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gp = gvlist(gl); |
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mapcoord(p0, gp[2*n-2]+tx0, gp[2*n-1]+ty0); |
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while (n--) { |
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mapcoord(p1, gp[0]+tx0, gp[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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gp += 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 pixval[SSS*SSS+1]; /* possible pixel values */ |
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COLOR ctmp0, ctmp1; |
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double d; |
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COLR *scanout; |
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int x, y; |
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register int i, j; |
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int cnt; |
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register int inglyph; |
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|
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fprintf(fp, "-Y %d +X %d\n", ysiz/SSS, xsiz/SSS); |
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|
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scanout = (COLR *)malloc(xsiz/SSS*sizeof(COLR)); |
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if (scanout == NULL) |
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error(SYSTEM, "Out of memory in writemap"); |
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for (i = 0; i <= SSS*SSS; i++) { /* compute possible values */ |
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copycolor(ctmp0, fgcolor); |
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d = (double)i/(SSS*SSS); |
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scalecolor(ctmp0, d); |
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copycolor(ctmp1, bgcolor); |
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d = 1.0 - d; |
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scalecolor(ctmp1, d); |
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addcolor(ctmp0, ctmp1); |
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setcolr(pixval[i], colval(ctmp0,RED), |
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colval(ctmp0,GRN), colval(ctmp0,BLU)); |
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} |
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for (y = ysiz/SSS-1; y >= 0; y--) { |
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inglyph = 0; |
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for (x = 0; x < xsiz/SSS; x++) { |
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cnt = 0; |
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for (j = 0; j < SSS; j++) |
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for (i = 0; i < SSS; i++) { |
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if (tstbit(x*SSS+i, y*SSS+j)) |
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inglyph ^= 1<<j; |
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if (inglyph & 1<<j) |
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cnt++; |
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} |
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copycolr(scanout[x], pixval[cnt]); |
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} |
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if (fwritecolrs(scanout, xsiz/SSS, 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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} |
