Annotation of loncom/cgi/mimeTeX/gfuntype.c, revision 1.3
1.1 albertel 1: /****************************************************************************
2: *
3: * Copyright (c) 2002, John Forkosh Associates, Inc. All rights reserved.
4: * --------------------------------------------------------------------------
5: * This file is part of mimeTeX, which is free software. You may redistribute
6: * and/or modify it under the terms of the GNU General Public License,
7: * version 2 or later, as published by the Free Software Foundation.
8: * MimeTeX is distributed in the hope that it will be useful, but
9: * WITHOUT ANY WARRANTY, not even the implied warranty of MERCHANTABILITY.
10: * See the GNU General Public License for specific details.
11: * By using mimeTeX, you warrant that you have read, understood and
12: * agreed to these terms and conditions, and that you are at least 18 years
13: * of age and possess the legal right and ability to enter into this
14: * agreement and to use mimeTeX in accordance with it.
15: * Your mimeTeX distribution should contain a copy of the GNU General
16: * Public License. If not, write to the Free Software Foundation, Inc.,
17: * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18: * --------------------------------------------------------------------------
19: *
1.2 albertel 20: * Program: gfuntype [-g gformat] [-u isnoname] [-m msglevel]
21: * [-n fontname] [infile [outfile]]
1.1 albertel 22: *
23: * Purpose: Parses output from gftype -i
24: * and writes pixel bitmap data of the characters
25: * in a format suitable for a C header file, etc.
26: *
27: * --------------------------------------------------------------------------
28: *
29: * Command-line Arguments:
30: * --- args can be in any order ---
31: * infile name of input file
32: * (defaults to stdin if no filenames given)
33: * outfile name of output file
34: * (defaults to stdout if <2 filenames given)
1.2 albertel 35: * -g gformat gformat=1(default) for bitmap representation,
36: * or 2,3 for 8-bit,4-bit .gf-like compression,
37: * or 0 to choose smallest format.
38: * Add 10 (gformat=10,12,13,14) to embed scan
39: * line repeat counts in format.
40: * -u isnoname isnoname=1(default) to output symbols not
41: * defined/named in mimetex.h, or 0 to omit them
1.1 albertel 42: * -m msglevel verbose if msglevel>=9 (vv if >=99)
43: * -n fontname string used for fontname
44: * (defaults to noname)
45: *
46: * Exits: 0=success, 1=some error
47: *
48: * Notes: o To compile
49: * cc gfuntype.c mimetex.c -lm -o gfuntype
50: * needs mimetex.c and mimetex.h
51: *
52: * Source: gfuntype.c
53: *
54: * --------------------------------------------------------------------------
55: * Revision History:
56: * 09/22/02 J.Forkosh Installation.
1.2 albertel 57: * 10/11/05 J.Forkosh .gf-style format options added.
1.1 albertel 58: *
59: ****************************************************************************/
60:
61: /* --------------------------------------------------------------------------
62: standard headers, program parameters, global data and macros
63: -------------------------------------------------------------------------- */
64: /* --- standard headers --- */
65: #include <stdio.h>
66: #include <stdlib.h>
67: #include <string.h>
68: #include <ctype.h>
69: /* --- application headers --- */
70: /* #define SIGNEDCHAR */
71: #include "mimetex.h"
72: /* --- parameters either -D defined on cc line, or defaulted here --- */
73: #ifndef MSGLEVEL
1.2 albertel 74: #define MSGLEVEL 0
75: #endif
76: #ifndef GFORMAT
77: #define GFORMAT 1
78: #endif
79: #ifndef ISREPEAT
80: #define ISREPEAT 1
1.1 albertel 81: #endif
82: /* --- message level (verbose test) --- */
83: static int msglevel = MSGLEVEL; /* verbose if msglevel >= 9 */
84: static FILE *msgfp; /* verbose output goes here */
1.2 albertel 85: /* --- output file format --- */
86: static int isnoname = 1; /* true to output unnamed symbols */
87: static char *noname = "(noname)"; /* char name used if lookup fails */
88: static int gformat = GFORMAT; /* 1=bitmap, 2=.gf-like */
89: static int isrepeat = ISREPEAT; /* true to store line repeat counts*/
90: /* extern int imageformat; */ /* as per gformat, 1=bitmap,2=.gf */
1.1 albertel 91: /* --- miscellaneous other data --- */
92: #define CORNER_STUB ".<--" /* start of upper,lower-left line */
1.2 albertel 93: #define BLANKCHAR_STUB "character is entirely blank" /* signals blank char */
1.1 albertel 94: #define TYPECAST "(pixbyte *)" /* typecast for pixmap string */
95:
96: /* ==========================================================================
97: * Function: main() for gfuntype.c
98: * Purpose: interprets command-line args, etc
99: * --------------------------------------------------------------------------
100: * Command-Line Arguments:
101: * See above
102: * --------------------------------------------------------------------------
103: * Returns: 0=success, 1=some error
104: * --------------------------------------------------------------------------
105: * Notes: o
106: * ======================================================================= */
107: /* --- entry point --- */
108: int main ( int argc, char *argv[] )
109: {
110: /* --------------------------------------------------------------------------
111: Allocations and Declarations
112: -------------------------------------------------------------------------- */
113: int argnum = 0; /* argv[] index for command-line args */
114: int inarg=0, outarg=0; /* argv[] indexes for infile, outfile */
115: int iserror = 1; /* error signal */
116: int charnum, /* character number (nextchar->charnum) */
117: nchars = 0; /* #chars in font */
118: char fontname[99] = "noname", /* font name */
119: *getcharname(); /* get character name from its number */
120: FILE /* *fopen(),*/ *infp=stdin, *outfp=stdout; /* init file pointers */
121: chardef *getnextchar(), *nextchar, /* read and parse next char in infp */
122: *fontdef[256]; /* chars stored using charnum as index */
123: int cstruct_chardef(); /* emit C struct for a character map */
124: int type_raster(); /* display debugging output */
125: char *copyright = /* copyright, gnu/gpl notice */
126: "+-----------------------------------------------------------------------+\n"
127: "|gfuntype ver 1.00, Copyright(c) 2002-2003, John Forkosh Associates, Inc|\n"
128: "+-----------------------------------------------------------------------+\n"
129: "| gfuntype is free software licensed to you under terms of the GNU/GPL, |\n"
130: "| and comes with absolutely no warranty whatsoever. |\n"
131: "+-----------------------------------------------------------------------+";
132: /* --------------------------------------------------------------------------
133: interpret command-line arguments
134: -------------------------------------------------------------------------- */
135: while ( argc > ++argnum ) /* check for flags and filenames */
136: if ( *argv[argnum] == '-' ) /* got some '-' flag */
137: {
138: char flag = tolower(*(argv[argnum]+1)); /* char following '-' */
139: argnum++; /* arg following flag is usually its value */
140: switch ( flag ) /* see what user wants to tell us */
141: {
142: /* --- no usage for clueless users yet --- */
143: default: exit(iserror); /* exit quietly for unrecognized input */
144: /* --- adjustable program parameters (not checking input) --- */
1.2 albertel 145: case 'g': gformat = atoi(argv[argnum]);
146: isrepeat = (gformat>=10?1:0);
147: gformat = gformat%10; break;
148: case 'u': isnoname = atoi(argv[argnum]); break;
149: case 'm': msglevel = atoi(argv[argnum]); break;
1.1 albertel 150: case 'n': strcpy(fontname,argv[argnum]); break;
151: } /* --- end-of-switch() --- */
152: } /* --- end-of-if(*argv[]=='-') --- */
153: else /* this arg not a -flag, so it must be... */
154: if ( inarg == 0 ) /* no infile arg yet */
155: inarg = argnum; /* so use this one */
156: else /* we already have an infile arg */
157: if ( outarg == 0 ) /* but no outfile arg yet */
158: outarg = argnum; /* so use this one */
159: /* --- set verbose file ptr --- */
160: msgfp = (outarg>0? stdout : stderr); /* use stdout or stderr */
161: /* --- emit copyright, gnu/gpl notice --- */
162: fprintf(msgfp,"%s\n",copyright); /* display copyright, gnu/gpl info */
163: /* --- display input args if verbose output --- */
164: if ( msglevel >= 9 ) /* verbose output requested */
1.2 albertel 165: fprintf(msgfp,"gfuntype> infile=%s outfile=%s, fontname=%s format=%d.%d\n",
166: (inarg>0?argv[inarg]:"stdin"), (outarg>0?argv[outarg]:"stdout"),
167: fontname, gformat,isrepeat);
1.1 albertel 168: /* --------------------------------------------------------------------------
169: initialization
170: -------------------------------------------------------------------------- */
171: /* --- initialize font[] array --- */
172: for ( charnum=0; charnum<256; charnum++ ) /*for each possible char in font*/
173: fontdef[charnum] = (chardef *)NULL; /* char doesn't exist yet */
174: /* --- open input file (if necessary) --- */
175: if ( inarg > 0 ) /* input from file, not from stdin */
176: if ( (infp = fopen(argv[inarg],"r")) == NULL ) /*try to open input file*/
177: { fprintf(msgfp,"gfuntype> can't open %s for read\n",argv[inarg]);
178: goto end_of_job; } /* report error and quit */
1.2 albertel 179: /* --- set format for mimetex.c functions --- */
180: if ( gformat<0 || gformat>3 ) gformat=1; /* sanity check */
181: /* if ( gformat == 1 ) imageformat = 1; */ /* force bitmap format */
182: /* else gformat = imageformat = 2; */ /* or force .gf format */
1.1 albertel 183: /* --------------------------------------------------------------------------
184: process input file
185: -------------------------------------------------------------------------- */
186: while ( (nextchar=getnextchar(infp)) != NULL ) /* get each char in file */
187: {
188: /* --- display character info --- */
189: if ( msglevel >= 9 ) /* verbose output requested */
190: fprintf(msgfp,"gfuntype> Char#%3d, loc %4d: ul=(%d,%d) ll=(%d,%d)\n",
191: nextchar->charnum, nextchar->location,
192: nextchar->topleftcol,nextchar->toprow,
193: nextchar->botleftcol,nextchar->botrow);
194: if ( msglevel >= 19 ) /* if a bit more verbose */
195: type_raster(&(nextchar->image),msgfp); /*display ascii image of raster*/
196: /* --- store character in font */
197: charnum = nextchar->charnum; /* get char number of char in font */
198: if ( charnum>=0 && charnum<=255 ) /* check for valid range */
199: fontdef[charnum] = nextchar; /* store char in font */
200: } /* --- end-of-while(charnum>0) --- */
201: /* --------------------------------------------------------------------------
202: generate output file
203: -------------------------------------------------------------------------- */
204: /* --- open output file (if necessary) --- */
205: if ( outarg > 0 ) /* output to a file, not to stdout */
206: if ( (outfp = fopen(argv[outarg],"w")) == NULL ) /*try to open output file*/
207: { fprintf(msgfp,"gfuntype> can't open %s for write\n",argv[outarg]);
208: goto end_of_job; } /* report error and quit */
209: /* --- header lines --- */
210: fprintf(outfp,"/%c --- fontdef for %s --- %c/\n", '*',fontname,'*');
211: fprintf(outfp,"static\tchardef %c%s[] =\n {\n", ' ',fontname);
212: /* --- write characters comprising font --- */
213: for ( charnum=0; charnum<256; charnum++ ) /*for each possible char in font*/
1.2 albertel 214: if ( fontdef[charnum] != (chardef *)NULL ) /*check if char exists in font*/
215: { char *charname = getcharname(fontname,charnum);
216: if ( charname!=NULL || isnoname ) { /* char defined or want undefined */
217: if ( ++nchars > 1 ) /* bump count */
218: fprintf(outfp,",\n"); /* and terminate preceding chardef */
219: fprintf(outfp," /%c --- pixel bitmap for %s char#%d %s --- %c/\n",
220: '*',fontname,charnum,(charname==NULL?noname:charname),'*');
221: cstruct_chardef(fontdef[charnum],outfp,6); } /*emit chardef struct*/
222: else
223: if(0)fprintf(outfp,"NULL"); /* no character in this position */
224: } /* --- end-of-if(fontdef[]!=NULL) --- */
225: else
226: if(0)fprintf(outfp,"NULL"); /* no character in this position */
1.1 albertel 227: /* --- write trailer chardef and closing brace --- */
228: fprintf(outfp,",\n"); /* finish up last map from loop */
229: fprintf(outfp," /%c --- trailer --- %c/\n",'*','*'); /* trailer... */
1.2 albertel 230: fprintf(outfp," { -99, -999, 0,0,0,0, { 0,0,0,0, %s\"\\0\" } }\n",
1.1 albertel 231: TYPECAST);
232: fprintf(outfp," } ;\n"); /* terminating }; for fontdef */
233: /* --------------------------------------------------------------------------
234: end-of-job
235: -------------------------------------------------------------------------- */
236: /* --- reset error status for okay exit --- */
237: iserror = 0;
238: /* --- close files (if they're open and not stdin/out) --- */
239: end_of_job:
240: if ( infp!=NULL && infp!=stdin ) fclose( infp);
241: if ( outfp!=NULL && outfp!=stdout ) fclose(outfp);
242: exit ( iserror );
243: } /* --- end-of-function main() --- */
244:
245:
246: /* ==========================================================================
247: * Function: getnextchar ( fp )
248: * Purpose: Reads and parses the next character definition on fp,
249: * and returns a new chardef struct describing that character.
250: * --------------------------------------------------------------------------
251: * Arguments: fp (I) FILE * to input file
252: * (containing output from gftype -i)
253: * Returns: ( chardef * ) ptr to chardef struct describing character,
254: * or NULL for eof or any error
255: * --------------------------------------------------------------------------
256: * Notes: o fp is left so the next line read from it will be
257: * the one following the final .<-- line.
258: * ======================================================================= */
259: /* --- entry point --- */
260: chardef *getnextchar ( FILE *fp )
261: {
262: /* --------------------------------------------------------------------------
263: Allocations and Declarations
264: -------------------------------------------------------------------------- */
265: chardef *new_chardef(), *nextchar=(chardef *)NULL; /*ptr returned to caller*/
266: int delete_chardef(); /* free allocated memory if error */
267: int findnextchar(), charnum,location; /* get header line for next char */
268: int rasterizechar(); /* ascii image --> raster pixmap */
1.2 albertel 269: int parsestat=(-999), parsecorner(); /* get col,row from ".<--" line */
1.1 albertel 270: char *readaline(); /* read next line from fp */
271: /* --------------------------------------------------------------------------
272: initialization
273: -------------------------------------------------------------------------- */
1.2 albertel 274: while ( parsestat == (-999) ) { /* flush entirely blank characters */
275: /* --- find and interpret header line for next character --- */
276: charnum = findnextchar(fp,&location); /* read and parse header line */
277: if ( charnum < 0 ) goto error; /* eof or error, no more chars */
278: /* --- allocate a new chardef struct and begin populating it --- */
279: if ( nextchar == (chardef *)NULL ) /* haven't allocated chardef yet */
280: if ( (nextchar=new_chardef()) /* allocate a new chardef */
281: == (chardef *)NULL ) goto error; /* and quit if we failed */
282: nextchar->charnum = charnum; /* store charnum in struct */
283: nextchar->location = location; /* and location */
284: /* --- get upper-left corner line --- */
285: parsestat = parsecorner(readaline(fp), /* parse corner line */
286: &(nextchar->toprow),&(nextchar->topleftcol)); /* row and col from line */
287: } /* --- end-of-while(parsestat) --- */
288: if ( !parsestat ) goto error; /* quit if parsecorner() failed */
1.1 albertel 289: /* --------------------------------------------------------------------------
290: interpret character image (and parse terminating corner line)
291: -------------------------------------------------------------------------- */
292: /* --- read ascii character image and interpret as integer bitmap --- */
293: if ( rasterizechar(fp,&nextchar->image) != 1 ) /* parse image of char */
294: goto error; /* and quit if failed */
295: /* --- get lower-left corner line --- */
296: if ( !parsecorner(readaline(NULL), /* reread and parse corner line */
297: &(nextchar->botrow),&(nextchar->botleftcol)) ) /* row and col from line */
298: goto error; /* and quit if failed */
299: /* --------------------------------------------------------------------------
300: done
301: -------------------------------------------------------------------------- */
302: goto end_of_job; /* skip error return if successful */
303: error:
304: if ( nextchar != (chardef *)NULL ) /* have an allocated chardef */
305: delete_chardef(nextchar); /* so deallocate it */
306: nextchar = (chardef *)NULL; /* and reset ptr to null for error */
307: end_of_job:
308: return ( nextchar ); /* back with chardef or null */
309: } /* --- end-of-function getnextchar() --- */
310:
311:
312: /* ==========================================================================
313: * Function: getcharname ( fontname, charnum )
314: * Purpose: Looks up charnum for the family specified by fontname
315: * and returns the corresponding charname.
316: * --------------------------------------------------------------------------
317: * Arguments: fontname (I) char * containing fontname for font family
1.2 albertel 318: * (from -n switch on command line)
1.1 albertel 319: * charnum (I) int containing the character number
320: * whose corresponding name is wanted.
321: * Returns: ( char * ) ptr to character name
322: * or NULL if charnum not found in table
323: * --------------------------------------------------------------------------
324: * Notes: o
325: * ======================================================================= */
326: /* --- entry point --- */
327: char *getcharname ( char *fontname, int charnum )
328: {
329: /* --------------------------------------------------------------------------
330: Allocations and Declarations
331: -------------------------------------------------------------------------- */
332: /* --- recognized font family names and our corresponding numbers --- */
1.2 albertel 333: static char *fnames[] = /*font name from -n switch on command line*/
1.3 ! albertel 334: { "cmr","cmmib","cmmi","cmsy","cmex","bbold","rsfs",
! 335: "stmary","cyr", NULL };
1.2 albertel 336: static int fnums[] = /* corresponding mimetex fontfamily number*/
1.3 ! albertel 337: { CMR10,CMMIB10,CMMI10,CMSY10,CMEX10,BBOLD10,RSFS10,
! 338: STMARY10, CYR10, -1 };
1.2 albertel 339: static int offsets[] = /* symtable[ichar].charnum = charnum-offset*/
1.3 ! albertel 340: { 0, 0, 0, 0, 0, 0, 65,
! 341: 0, 0, -1 };
1.1 albertel 342: /* --- other local declarations --- */
1.2 albertel 343: char *charname = NULL; /* character name returned to caller */
1.1 albertel 344: char flower[99] = "noname"; /* lowercase caller's fontname */
1.2 albertel 345: int ifamily = 0, /* fnames[] (and fnums[],offsets[]) index */
346: offset = 0, /* offsets[ifamily] */
347: ichar = 0; /* loop index */
1.1 albertel 348: /* --------------------------------------------------------------------------
349: lowercase caller's fontname and look it up in fnames[]
350: -------------------------------------------------------------------------- */
351: /* --- lowercase caller's fontname --- */
352: for ( ichar=0; *fontname!='\000'; ichar++,fontname++ )/*lowercase each char*/
353: flower[ichar] = (isalpha(*fontname)? tolower(*fontname) : *fontname);
354: flower[ichar] = '\000'; /* null-terminate lowercase fontname */
355: if ( strlen(flower) < 2 ) goto end_of_job; /* no lookup match possible */
356: /* --- look up lowercase fontname in our fnames[] table --- */
357: for ( ifamily=0; ;ifamily++ ) /* check fnames[] for flower */
358: if ( fnames[ifamily] == NULL ) goto end_of_job; /* quit at end-of-table */
359: else if ( strstr(flower,fnames[ifamily]) != NULL ) break; /* found it */
1.2 albertel 360: offset = offsets[ifamily]; /* symtable[ichar].charnum = charnum-offset*/
1.1 albertel 361: ifamily = fnums[ifamily]; /* xlate index to font family number */
362: /* --------------------------------------------------------------------------
363: now look up name for caller's charnum in ifamily, and return it to caller
364: -------------------------------------------------------------------------- */
365: /* --- search symtable[] for charnum in ifamily --- */
366: for ( ichar=0; ;ichar++ ) /*search symtable[] for charnum in ifamily*/
367: if ( symtable[ichar].symbol == NULL ) goto end_of_job; /* end-of-table */
368: else
369: if ( symtable[ichar].family == ifamily /* found desired family */
370: && symtable[ichar].handler == NULL ) /* and char isn't a "dummy" */
1.2 albertel 371: if ( symtable[ichar].charnum == charnum-offset ) break; /*got charnum*/
1.1 albertel 372: /* --- return corresponding charname to caller --- */
373: charname = symtable[ichar].symbol; /* pointer to symbol name in table */
374: end_of_job:
1.2 albertel 375: if ( charname==NULL && isnoname ) /* want unnamed/undefined chars */
376: charname = noname; /* so replace null return with noname */
1.1 albertel 377: return ( charname );
378: } /* --- end-of-function getcharname() --- */
379:
380:
381: /* ==========================================================================
382: * Function: findnextchar ( fp, location )
383: * Purpose: Finds next "beginning of char" line in fp
384: * and returns the character number,
385: * and (optionally) location if arg provided.
386: * --------------------------------------------------------------------------
387: * Arguments: fp (I) FILE * to input file
388: * (containing output from gftype -i)
389: * location (O) int * returning "location" of character
390: * (or pass NULL and it won't be returned)
391: * Returns: ( int ) character number,
392: * or -1 for eof or any error
393: * --------------------------------------------------------------------------
394: * Notes: o fp is left so the next line read from it will be
395: * the one following the "beginning of char" line
396: * ======================================================================= */
397: /* --- entry point --- */
398: int findnextchar ( FILE *fp, int *location )
399: {
400: /* --------------------------------------------------------------------------
401: Allocations and Declarations
402: -------------------------------------------------------------------------- */
403: static char keyword[99]="beginning of char "; /*signals start of next char*/
404: char *readaline(), *line; /* read next line from fp */
405: char *strstr(), *strchr(), *delim; /* search line for substring, char */
406: char token[99]; /* token extracted from line */
407: int charnum = (-1); /* character number returned to caller */
408: /* --------------------------------------------------------------------------
409: keep reading lines until eof or keyword found
410: -------------------------------------------------------------------------- */
411: while ( (line=readaline(fp)) != NULL ) /* read lines until eof */
412: {
413: if ( msglevel >= 999 ) /* very, very verbose output requested */
414: fprintf(msgfp,"nextchar> line = %s\n",line);
415: if ( (delim=strstr(line,keyword)) != NULL ) /* found keyword on line */
416: {
417: /* --- get character number from line --- */
418: strcpy(token,delim+strlen(keyword)); /* char num follows keyword */
419: charnum = atoi(token); /* interpret token as integer charnum */
420: /* --- get location at beginning of line --- */
421: if ( location != (int *)NULL ) /* caller wants location returned */
422: if ( (delim=strchr(line,':')) != NULL ) /* location precedes colon */
423: { *delim = '\000'; /* terminate line after location */
424: *location = atoi(line); } /* interpret location as integer */
425: break; /* back to caller with charnum */
426: } /* --- end-of-if(delim!=NULL) --- */
427: } /* --- end-of-while(line!=NULL) --- */
428: return ( charnum ); /* back to caller with char number or -1 */
429: } /* --- end-of-function findnextchar() --- */
430:
431:
432: /* ==========================================================================
433: * Function: rasterizechar ( fp, rp )
434: * Purpose: Reads and parses subsequent lines from fp
435: * (until a terminating ".<--" line),
436: * representing the ascii image of the character in fp,
437: * and returns the results in raster struct rp
438: * --------------------------------------------------------------------------
439: * Arguments: fp (I) FILE * to input file
440: * (containing output from gftype -i)
441: * positioned immediately after top .<-- line,
442: * ready to read first line of ascii image
443: * rp (O) raster * returning the rasterized
444: * character represented on fp as an ascii image
445: * Returns: ( int ) 1=okay, or 0=eof or any error
446: * --------------------------------------------------------------------------
447: * Notes: o fp is left so the last line (already) read from it
448: * contains the terminating .<-- corner information
449: * (readaline(NULL) will reread this last line)
450: * o char images on fp can be no wider than 31 pixels
451: * ======================================================================= */
452: /* --- entry point --- */
453: int rasterizechar ( FILE *fp, raster *image )
454: {
455: /* --------------------------------------------------------------------------
456: Allocations and Declarations
457: -------------------------------------------------------------------------- */
458: char *readaline(), *line; /* read next scan line for char from fp */
1.2 albertel 459: unsigned char bitvec[1024][128]; /* scan lines parsed up to 1024x1024 bits */
460: int bitcmp(); /* compare bit strings */
1.1 albertel 461: int height = 0, /* #scan lines in fp comprising char */
1.2 albertel 462: width = 0; /* #chars on longest scan line */
463: int iscan, /* bitvec[] index */
1.1 albertel 464: ibit; /* bit along scan (i.e., 0...width-1) */
465: int isokay = 0; /* returned status, init for failure */
1.2 albertel 466: /* --- bitmap and .gf-formatted image info (we'll choose smallest) --- */
467: int iformat = gformat; /*0=best, 1=bitmap, 2=8-bit.gf, 3=4-bit.gf*/
468: unsigned char gfpixcount[2][65536]; /* .gf black/white flips (max=64K) */
469: int npixcounts[2] = {9999999,9999999}; /* #counts for 8-bit,4-bit .gf */
470: int nbytes1=9999999,nbytes2=9999999,nbytes3=9999999;/*#bytes for format*/
1.1 albertel 471: /* --------------------------------------------------------------------------
472: read lines till ".<--" terminator, and construct one vector[] int per line
473: -------------------------------------------------------------------------- */
1.2 albertel 474: memset(bitvec,0,128*1024); /* zero-fill bitvec[] */
1.1 albertel 475: while ( (line=readaline(fp)) != NULL ) /* read lines until eof */
476: {
477: /* --- allocations and declarations --- */
478: int icol, ncols=strlen(line); /* line[] column index, #cols in line[] */
479: /* --- check for end-of-char (when we encounter corner line) --- */
480: if ( memcmp(line,CORNER_STUB,strlen(CORNER_STUB)) == 0 ) /* corner line */
481: break; /* so done with loop */
482: /* --- parse line (encode asterisks comprising character image) --- */
1.2 albertel 483: memset(bitvec[height],0,128); /* first zero out all bits */
1.1 albertel 484: for ( icol=0; icol<ncols; icol++ ) /* now check line[] for asterisks */
485: if ( line[icol] == '*' ) /* we want to set this bit */
486: { setlongbit(bitvec[height],icol); /* set bit */
487: if ( icol >= width ) width=icol+1; } /* and check for new width */
488: height++; /* bump character height */
489: } /* --- end-of-while(line!=NULL) --- */
490: if ( height<1 || width<1 ) /* some problem parsing character */
491: goto end_of_job; /* so quit */
492: /* --------------------------------------------------------------------------
1.2 albertel 493: init image values
1.1 albertel 494: -------------------------------------------------------------------------- */
495: if ( image->pixmap != NULL ) /* hmm, somebody already allocated memory */
1.2 albertel 496: free((void *)image->pixmap); /* so just free it */
1.1 albertel 497: image->width = width; /* set image width within raster struct */
498: image->height = height; /* and height */
1.2 albertel 499: image->format = gformat; /* set format (will be reset below) */
500: image->pixsz = 1; /* #bits per pixel (or #counts in .gf fmt) */
501: if ( gformat==0 || gformat==1 ) /* bitmap representation allowed */
502: { nbytes1 = pixmapsz(image); /* #bytes needed for bitmap */
503: iformat = 1; } /* default to bitmap format */
504: /* --------------------------------------------------------------------------
505: perform .gf-like compression on image in bitvec
506: -------------------------------------------------------------------------- */
507: if ( gformat == 0 /* choose optimal/smallest respresentation */
508: || gformat==2 || gformat==3 ) /* .gf-like compressed representation */
509: {
510: /* --- try both 8-bits/count and 4-bits/count for best compression --- */
511: int maxbitcount[2] = {254,14}; /* don't count too much in one byte */
512: int repeatcmds[2] = {255,15}; /* opcode for repeat/duplicate count */
513: int minbytes = 0; /* #bytes needed for smallest format */
514: for ( iformat=2; iformat<=3; iformat++ ) { /* 2=8-bit packing, 3=4-bit */
515: int gfbitcount = 0, /* count of consecutive gfbitval's */
516: gfbitval = 0, /* begin with count of leading 0's */
517: pixcount = 0; /* #packed bytes (#black/white flips) */
518: unsigned char *gfcount = gfpixcount[iformat-2]; /*counts for this format*/
519: if ( gformat!=0 && gformat!=iformat ) /* this format not allowed */
520: continue; /* so just skip it */
521: for ( iscan=0; iscan<height; iscan++ ) /* for each integer in bitvec[] */
522: {
523: int bitval = 0; /* current actual pixel value */
524: int nrepeats=0, nextreps=0; /* #duplicate lines below current,next line*/
525: /* --- check for repeated/duplicate scan lines --- */
526: if ( isrepeat /* we're storing scan line repeat counts */
527: && iscan < height-1 ) { /* current scan line isn't the last line */
528: /* --- count repeats --- */
529: int jscan = iscan; /* compare current scan with lines below it*/
530: while ( ++jscan < height ) { /* until last scan line */
531: if (nrepeats == jscan-iscan-1) /*no intervening non-identical lines*/
532: if ( bitcmp(bitvec[iscan],bitvec[jscan],width) == 0 ) /* identical */
533: nrepeats++; /* so bump repeat count */
534: if ( jscan > iscan+1 ) /* we're below next line */
535: if (nextreps == jscan-iscan-2) /*no intervening non-identical lines*/
536: if ( bitcmp(bitvec[iscan+1],bitvec[jscan],width) == 0 )/*identical*/
537: nextreps++; } /* so bump next lline repeat count */
538: /* --- set repeat command and count --- */
539: if ( nrepeats > 0 ) { /* found repeated lines below current */
540: int maxrepeats = maxbitcount[iformat-2]; /*max count/repeats per byte*/
541: if ( nrepeats > maxrepeats ) nrepeats=maxrepeats; /* don't exceed max */
542: {setbyfmt(iformat,gfcount,pixcount,repeatcmds[iformat-2]);} /*set cmd*/
543: {setbyfmt(iformat,gfcount,pixcount+1,nrepeats);} /* set #repeats */
544: pixcount += 2; } /* don't bump pixcount within macros */
545: } /* --- end-of-if(isrepeat) --- */
546: /* --- set bit counts for current scan line --- */
547: for ( ibit=0; ibit<width; ibit++ ) /* for all bits in this scanline */
548: {
549: bitval = getlongbit(bitvec[iscan],ibit); /* check actual pixel value */
550: if ( bitval != gfbitval ) { /* black-to-white edge (or vice versa) */
551: {setbyfmt(iformat,gfcount,pixcount,gfbitcount);} /*set byte or nibble*/
552: pixcount++; /* don't bump pixcount within macro */
553: gfbitcount = 0; /* reset consecutive bit count */
554: gfbitval = 1-gfbitval; } /* flip bit to be counted */
555: else /* check count if continuing with same val */
556: if ( gfbitcount >= maxbitcount[iformat-2] ) { /* max count per byte */
557: {setbyfmt(iformat,gfcount,pixcount,gfbitcount);} /*set byte or nibble*/
558: clearbyfmt(iformat,gfcount,pixcount+1); /*followed by dummy 0 count*/
559: pixcount += 2; /* don't bump pixcount within macros */
560: gfbitcount = 0; } /* reset consecutive bit count */
561: if ( bitval == gfbitval ) /* same bit val as preceding, or first new */
562: gfbitcount++; /* so just count another pixel */
563: } /* --- end-of-for(ibit) --- */
564: /* --- adjust for repeated scan lines --- */
565: iscan += nrepeats; /* skip repeated/duplicate scan lines */
566: if ( nrepeats>0 || nextreps>0 ) /* emit count to align on full scan */
567: if ( iscan < height-1 ) /* have another scan line below this one */
568: if ( gfbitcount > 0 ) { /* should always have some final count */
569: {setbyfmt(iformat,gfcount,pixcount,gfbitcount);} /*set byte or nibble*/
570: pixcount++; /* don't bump pixcount within macro */
571: gfbitcount = 0; /* reset consecutive bit count */
572: if ( bitval == getlongbit(bitvec[iscan+1],0) ) { /* same bit value */
573: clearbyfmt(iformat,gfcount,pixcount); /*so we need a dummy 0 count*/
574: pixcount++; } /* don't bump pixcount within macros */
575: else /* bitval flips at start of next line */
576: gfbitval = 1-gfbitval; /* so flip bit to be counted */
577: } /* --- end-of-if(nrepeats...gfbitcount>0) --- */
578: } /* --- end-of-for(iscan) --- */
579: /* --- store final count --- */
580: if ( gfbitcount > 0 ) { /* have a final count */
581: {setbyfmt(iformat,gfcount,pixcount,gfbitcount);} /*set byte or nibble*/
582: pixcount++; } /* don't bump pixcount within macro */
583: else /* ended exactly after maxbitcount? */
584: if ( getbyfmt(iformat,gfcount,pixcount-1) == 0 )/*have dummy 0 trailer?*/
585: pixcount--; /* remove unneeded dummy trailer */
586: /* --- save count to choose smallest --- */
587: npixcounts[iformat-2] = pixcount; /* save count */
588: } /* --- end-of-for(iformat) --- */
589: /* --- check for optimal/smallest format --- */
590: nbytes2=npixcounts[0]; nbytes3=(1+npixcounts[1])/2; /* #bytes for count */
591: iformat = (nbytes2<nbytes3? 2:3); /* choose smallest format */
592: minbytes = (iformat==2?nbytes2:nbytes3); /* #bytes for smallest format */
593: if ( gformat == 0 ) /* bitmap representation also permitted */
594: if ( nbytes1 <= minbytes ) /* and it's the optimal/smallest format */
595: iformat = 1; /* so flip format */
596: /* --- move results to returned image --- */
597: if ( iformat != 1 ) { /* using a .gf format */
598: if ( (image->pixmap = (unsigned char *)malloc(minbytes)) /* alloc pixmap */
599: == NULL ) goto end_of_job; /* quit if failed to allocate pixmap */
600: memcpy(image->pixmap,gfpixcount[iformat-2],minbytes); /*copy local counts*/
601: image->format = iformat; /* signal byte counts or nibble counts */
602: image->pixsz = npixcounts[iformat-2]; /*#counts in pixmap for gformat=2,3*/
603: } /* --- end-of-if(iformat!=1) --- */
604: } /* --- end-of-if(gformat==2) --- */
1.1 albertel 605: /* --------------------------------------------------------------------------
606: copy each integer in bitvec[] to raster pixmap, bit by bit
607: -------------------------------------------------------------------------- */
1.2 albertel 608: if ( iformat == 1 ) /* bit-by-bit representation of image */
609: {
610: int ipixel = 0; /* pixmap index */
611: /* --- first allocate image raster pixmap for character --- */
612: if ( (image->pixmap = (unsigned char *)malloc(pixmapsz(image)))
613: == NULL ) goto end_of_job; /* quit if failed to allocate pixmap */
614: image->format = iformat; /* reset format */
615: /* --- now store bit image in allocated raster --- */
616: for ( iscan=0; iscan<height; iscan++ ) /* for each integer in bitvec[] */
617: for ( ibit=0; ibit<width; ibit++ ) /* for all bits in this scanline */
1.1 albertel 618: {
619: if ( getlongbit(bitvec[iscan],ibit) != 0 ) /* check current scan pixel */
620: { setlongbit(image->pixmap,ipixel); }
621: else /*turn off corresponding raster bit*/
622: { unsetlongbit(image->pixmap,ipixel); }
623: ipixel++; /* bump image raster pixel */
624: } /* --- end-of-for(iscan,ibit) --- */
1.2 albertel 625: } /* --- end-of-if(gformat==1) --- */
1.1 albertel 626: /* --------------------------------------------------------------------------
627: done
628: -------------------------------------------------------------------------- */
629: isokay = 1; /* reset flag for success */
630: end_of_job:
631: return ( isokay ); /* back with 1=success, 0=failure */
632: } /* --- end-of-function rasterizechar() --- */
633:
634:
635: /* ==========================================================================
636: * Function: parsecorner ( line, row, col )
637: * Purpose: Parses a "pixel corner" line (upper left or lower left)
638: * and returns the (col,row) information on it as integers.
639: * --------------------------------------------------------------------------
640: * Arguments: line (I) char * to input line containing
641: * ".<--This pixel's..." to be parsed
642: * row (O) int * returning the (,row)
643: * col (O) int * returning the (col,)
644: * Returns: ( int ) 1 if successful, or 0 for any error
645: * --------------------------------------------------------------------------
646: * Notes: o
647: * ======================================================================= */
648: /* --- entry point --- */
649: int parsecorner ( char *line, int *row, int *col )
650: {
651: /* --------------------------------------------------------------------------
652: Allocations and Declarations
653: -------------------------------------------------------------------------- */
654: int isokay = 0; /* success/fail flag, init for failure */
655: char field[99], *delim; /*(col,row) field and ptr to various delims*/
656: /* --------------------------------------------------------------------------
657: extract (col,row) field from line, and interpret col and row as integers
658: -------------------------------------------------------------------------- */
659: /* --- first, check beginning of line --- */
660: if ( line == (char *)NULL ) goto end_of_job; /* no line supplied by caller */
1.2 albertel 661: /* --- check for blank line --- */
662: if ( strstr(line,BLANKCHAR_STUB) != NULL ) /* got entirely blank character */
663: return ( -999 ); /* so return special -999 signal */
664: /* --- check for corner --- */
1.1 albertel 665: if ( memcmp(line,CORNER_STUB,strlen(CORNER_STUB)) != 0 ) /*not valid corner*/
666: goto end_of_job; /* so quit */
667: /* --- extract col,row field from line --- */
668: if ( (delim=strchr(line,'(')) == NULL ) goto end_of_job; /*find open paren*/
669: strncpy(field,delim+1,10); /* extract next 10 chars */
670: field[10] = '\000'; /* and null-terminate field */
671: if ( (delim=strchr(field,')')) == NULL ) goto end_of_job; /*find close paren*/
672: *delim = '\000'; /* terminate field at close paren */
673: /* --- interpret col,row as integers --- */
674: if ( (delim=strchr(field,',')) == NULL ) goto end_of_job; /* find comma */
675: *delim = '\000'; /* break field into col and row */
676: if ( col != (int *)NULL ) /* caller gave us ptr for col */
677: *col = atoi(field); /* so return it to him */
678: if ( row != (int *)NULL ) /* caller gave us ptr for row */
679: *row = atoi(delim+1); /* so return it to him */
680: /* --------------------------------------------------------------------------
681: done
682: -------------------------------------------------------------------------- */
683: isokay = 1; /* reset flag for success */
684: end_of_job:
685: return ( isokay ); /* back with success/fail flag */
686: } /* --- end-of-function parsecorner() --- */
687:
688:
689: /* ==========================================================================
690: * Function: readaline ( fp )
691: * Purpose: Reads a line from fp, strips terminating newline,
692: * and returns ptr to internal buffer
693: * --------------------------------------------------------------------------
694: * Arguments: fp (I) FILE * to input file to be read.
695: * If null, returns line previously read.
696: * Returns: ( char * ) internal buffer containing line read,
697: * or NULL for eof or error.
698: * --------------------------------------------------------------------------
699: * Notes: o fp is left on the line following the returned line
700: * ======================================================================= */
701: /* --- entry point --- */
702: char *readaline ( FILE *fp )
703: {
704: /* --------------------------------------------------------------------------
705: Allocations and Declarations
706: -------------------------------------------------------------------------- */
1.2 albertel 707: static char buffer[2048]; /* static buffer returned to caller */
1.1 albertel 708: char *fgets(), *bufptr=buffer; /* read line from fp */
709: char *strchr(), *delim; /* remove terminating newline */
710: /* --------------------------------------------------------------------------
711: Read line and strip trailing newline
712: -------------------------------------------------------------------------- */
713: if ( fp != NULL ) /*if null, return previous line read*/
1.2 albertel 714: if ( (bufptr=fgets(buffer,2047,fp)) /* read next line from fp */
1.1 albertel 715: != NULL ) /* and check that we succeeded */
716: {
717: if ( (delim=strchr(bufptr,'\n')) /* look for terminating newline */
718: != NULL ) /* and check that we found it */
719: *delim = '\000'; /* truncate line at newline */
720: } /* --- end-of-if(fgets()!=NULL) --- */
721: return ( bufptr ); /*back to caller with buffer or null*/
722: } /* --- end-of-function readaline() --- */
1.2 albertel 723:
724:
725: /* ==========================================================================
726: * Function: bitcmp ( bs1, bs2, n )
727: * Purpose: compares the first n bits of two strings
728: * --------------------------------------------------------------------------
729: * Arguments: bs1 (I) unsigned char * to first bit string
730: * bs2 (I) unsigned char * to second bit string
731: * n (I) int containing #bits to compare
732: * Returns: ( int ) 0 if first n bits are identical
733: * -1 if first unmatching bit of bs1 is 0
734: * +1 if first unmatching bit of bs2 id 0
735: * --------------------------------------------------------------------------
736: * Notes: o
737: * ======================================================================= */
738: /* --- entry point --- */
739: int bitcmp ( unsigned char *bs1, unsigned char *bs2, int n )
740: {
741: /* --------------------------------------------------------------------------
742: Allocations and Declarations
743: -------------------------------------------------------------------------- */
744: int icmp = 0; /* returned to caller */
745: int nbytes = n/8, /* #full bytes we can compare with memcmp()*/
746: nbits = n%8, ibit=0; /* #trailing bits in last byte, index */
747: /* --------------------------------------------------------------------------
748: compare leading bytes, then trailing bits
749: -------------------------------------------------------------------------- */
750: if ( nbytes > 0 ) icmp = memcmp(bs1,bs2,nbytes); /* compare leading bytes */
751: if ( icmp == 0 ) /* leading bytes identical */
752: if ( nbits > 0 ) /* and we have trailing bits */
753: for ( ibit=0; ibit<nbits; ibit++ ) /* check each bit */
754: { icmp = (int)get1bit(bs1[nbytes],ibit) - (int)get1bit(bs2[nbytes],ibit);
755: if ( icmp != 0 ) break; } /* done at first unmatched bit */
756: return ( icmp ); /* back to caller with -1,0,+1 */
757: } /* --- end-of-function bitcmp() --- */
1.1 albertel 758: /* --- end-of-file gfuntype.c --- */
759:
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