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Annotation of researchv10no/cmd/dimpress/res.c, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: /*
        !             4:  *
        !             5:  * A few routines used to handle printer resident fonts. They cause us
        !             6:  * some problems because there's no guaranteed way the post-processor
        !             7:  * can be sure what fonts are resident on a particular printer. It's
        !             8:  * certainly possible that two otherwise identical printers could
        !             9:  * support different resident fonts, and we need to be able to deal
        !            10:  * with that situation. The way I've decided to handle things is have
        !            11:  * the post-processor look for special files in *bitdir/RESIDENT as
        !            12:  * part of the startup procedure. If the file's found and can be
        !            13:  * read it's used to get all the required resident font data for
        !            14:  * the printer. If we can't read the control file we'll just assume
        !            15:  * there aren't any resident fonts. Usually the file we're looking for
        !            16:  * will have the same name as the target printer, although that can
        !            17:  * be changed by an option - so we can handle different sets of
        !            18:  * resident fonts.
        !            19:  *
        !            20:  * The control file is ASCII right now and names the resident fonts,
        !            21:  * the available sizes, family tables, and the member maps. All the
        !            22:  * required maps are read and immediately written to the output file.
        !            23:  * Everything else is saved in resdata[] and only used when needed.
        !            24:  * See the comments at the start of resfonts() for a more complete
        !            25:  * description of the file.
        !            26:  *
        !            27:  * The member maps and family tables come from Imagen, although not
        !            28:  * directly. I got the info for the lucida fonts by taking one of
        !            29:  * their programs (mkres) and forcing routine dump_data() to run.
        !            30:  * The output from mkres was then used to build the control file.
        !            31:  * You may have to do something similiar if you've got a new set
        !            32:  * of printer resident fonts.
        !            33:  *
        !            34:  * There are other problems, most caused by Imagen's resident fonts.
        !            35:  * The most annoying is the need to use member maps and family tables.
        !            36:  * As it turns out the available member codes aren't good enough to
        !            37:  * access all the required characters in a resident font. That means
        !            38:  * we can't just use map 0 and the character code available in the
        !            39:  * font files. Things sure would have been simpler if resident fonts
        !            40:  * were more logical. Actually I'm not convinced resident fonts are
        !            41:  * that great an idea.
        !            42:  *
        !            43:  */
        !            44: 
        !            45: 
        !            46: #include <stdio.h>
        !            47: 
        !            48: #include "gen.h"                       /* definitions used by everyone */
        !            49: #include "ext.h"                       /* external variable declarations */
        !            50: #include "init.h"                      /* just used to get RESDIR */
        !            51: #include "rast.h"                      /* raster file definitions */
        !            52: #include "impcodes.h"                  /* Impress 2.0 opcodes */
        !            53: 
        !            54: 
        !            55: Resdata        resdata[MAXRESIDENT];           /* used to manage resident fonts */
        !            56: int    maxres = 0;                     /* entries so far in resdata[] */
        !            57: 
        !            58: 
        !            59: /*
        !            60:  *
        !            61:  * We'll want to add size list data for the resident fonts to the
        !            62:  * sizedata[] structure so mapsize() works properly.
        !            63:  *
        !            64:  */
        !            65: 
        !            66: 
        !            67: extern Sizedata        sizedata[];             /* so we can add resident font sizes */
        !            68: extern int     maxrast;
        !            69: 
        !            70: 
        !            71: /*****************************************************************************/
        !            72: 
        !            73: 
        !            74: resfonts(tf)
        !            75: 
        !            76: 
        !            77:     FILE       *tf;                    /* Impress commands go here */
        !            78: 
        !            79: 
        !            80: {
        !            81: 
        !            82: 
        !            83:     char       name[60];               /* control file pathname */
        !            84:     char       cmd[20];                /* commands read from *name */
        !            85:     int                i;                      /* fill in resdata[i] next */
        !            86:     int                member;                 /* starting member for triple */
        !            87:     int                symbol;                 /* starting symbol */
        !            88:     int                count;                  /* members mapped by this triple */
        !            89:     int                j, n;                   /* used for a bunch of things */
        !            90:     FILE       *fp;
        !            91: 
        !            92: 
        !            93: /*
        !            94:  *
        !            95:  * Resident fonts require some rather special attention. We'll need to
        !            96:  * keep track of all the resident font names and their associated
        !            97:  * family tables. In addition we'll need to download all the required
        !            98:  * member maps. All this stuff is expected to be in file *resfile
        !            99:  * which is located in *bitdir/RESIDENT. If the file can't be read
        !           100:  * we'll just assume there aren't any printer resident fonts.
        !           101:  *
        !           102:  * For now the control file is ASCII, even though there are more
        !           103:  * efficient ways of doing things. A decent alternative would be
        !           104:  * to have all the required Impress commands in the file. That
        !           105:  * way the file could just be copied directly to the output file.
        !           106:  * Member maps work nicely that way, but the family tables pose
        !           107:  * some problems because we've got to add the size to the font
        !           108:  * name string. Anyway there other choices and most any of them
        !           109:  * would cause the post-processor to run faster.
        !           110:  *
        !           111:  * For now the control file format looks something like,
        !           112:  *
        !           113:  *
        !           114:  *     font <name1>
        !           115:  *     sizes <size list> 0
        !           116:  *     families <n>
        !           117:  *             <map1>  <font1>
        !           118:  *                   .
        !           119:  *                   .
        !           120:  *                    .
        !           121:  *             <mapn>  <fontn>
        !           122:  *     font <name2>
        !           123:  *         .
        !           124:  *         .
        !           125:  *         .
        !           126:  *     font <namen>
        !           127:  *     map <mapname1> <n>
        !           128:  *             <mem1> <symbol1> <count1>
        !           129:  *                        .
        !           130:  *                        .
        !           131:  *                        .
        !           132:  *             <memn> <symboln> <countn>
        !           133:  *     map <mapname2> <n>
        !           134:  *
        !           135:  *             .
        !           136:  *             .
        !           137:  *             .
        !           138:  *
        !           139:  *     map <mapnamen> <n>
        !           140:  *             .
        !           141:  *             .
        !           142:  *             .
        !           143:  *           (EOF)
        !           144:  *
        !           145:  *
        !           146:  * The <size list> data must be given in increasing order and terminated
        !           147:  * with a 0 entry. Comments can be put in the file, although I don't
        !           148:  * recommend it. They're lines that have '#' as the first non white
        !           149:  * space character.
        !           150:  *
        !           151:  * The font names and family tables are saved in resdata[], size info
        !           152:  * is added to sizedata[], and the member maps are immediately downloaded.
        !           153:  *
        !           154:  * I'm not responsible for the member maps or family tables. I got the
        !           155:  * ones for the lucida font by running Imagen's mkres program with the
        !           156:  * dump_data() routine working (just took a few ifdefs out). The output
        !           157:  * from that routine was used to build the ASCII control file.
        !           158:  *
        !           159:  */
        !           160: 
        !           161: 
        !           162:     sprintf(name, "%s/%s/%s", bitdir, RESDIR, resfile);
        !           163:     if ( (fp = fopen(name, "r")) == NULL )
        !           164:        return;
        !           165: 
        !           166:     i = maxres - 1;                    /* incremented when "font" is read */
        !           167: 
        !           168:     while ( fscanf(fp, "%s", cmd) != EOF )  {
        !           169:        if ( strcmp(cmd, "font") == 0 )
        !           170:            fscanf(fp, "%10s", resdata[++i].name);
        !           171:        else if ( strcmp(cmd, "sizes") == 0 )  {
        !           172:            strncpy(sizedata[maxrast].name, resdata[i].name, L_FNAME);
        !           173:            j = 0;
        !           174:            while ( fscanf(fp, "%d", &n) != EOF  &&  n != 0 )
        !           175:                sizedata[maxrast].sizes[j++] = n;
        !           176:            sizedata[maxrast].sizes[j] = 999;
        !           177:            if ( ++maxrast >= MAXFONTS )
        !           178:                error(FATAL, "too many fonts in %s", name);
        !           179:        } else if ( strcmp(cmd, "families") == 0 )  {
        !           180:            fscanf(fp, "%d", &resdata[i].count);
        !           181:            for ( j = 0; j < resdata[i].count; j++ )
        !           182:                fscanf(fp, "%d %10s", &resdata[i].table[j].map, resdata[i].table[j].name);
        !           183:        } else if ( strcmp(cmd, "map") == 0 )  {
        !           184:            fscanf(fp, "%d %d", &n, &j);
        !           185:            putc(ACM, tf);
        !           186:            putc(n, tf);
        !           187:            putc(j, tf);
        !           188:            for ( ; j > 0; j-- )  {
        !           189:                fscanf(fp, "%d %d %d", &member, &symbol, &count);
        !           190:                putc(member, tf);
        !           191:                putint(symbol, tf);
        !           192:                putc(count, tf);
        !           193:            }   /* End for */
        !           194:        } else if ( cmd[0] == '#' )
        !           195:            while ( (n = getc(fp)) != EOF  &&  n != '\n' ) ;
        !           196:        else error(FATAL, "bad command %s in file %s", cmd, name);
        !           197:     }  /* End while */
        !           198: 
        !           199:     maxres = i + 1;
        !           200: 
        !           201:     fclose(fp);
        !           202: 
        !           203: }   /* End of resfonts */
        !           204: 
        !           205: 
        !           206: /*****************************************************************************/
        !           207: 
        !           208: 
        !           209: isresident(name)
        !           210: 
        !           211: 
        !           212:     char       *name;                  /* is this a printer resident font? */
        !           213: 
        !           214: 
        !           215: {
        !           216: 
        !           217: 
        !           218:     int                i;                      /* check res_data[i] next */
        !           219: 
        !           220: 
        !           221: /*
        !           222:  *
        !           223:  * Returns TRUE if font *name is a resident font and FALSE otherwise.
        !           224:  * Resident fonts are those listed in resdata[] array, which is set up
        !           225:  * in routine resfonts() using file *bitdir/RESIDENT/resfile.
        !           226:  *
        !           227:  */
        !           228: 
        !           229: 
        !           230:     for ( i = 0; i < maxres; i++ )
        !           231:        if ( strncmp(name, resdata[i].name, L_FNAME) == 0 )
        !           232:            return(TRUE);
        !           233: 
        !           234:     return(FALSE);
        !           235: 
        !           236: }   /* End of isresident */
        !           237: 
        !           238: 
        !           239: /*****************************************************************************/
        !           240: 
        !           241: 
        !           242: getresdata(f, s, tf)
        !           243: 
        !           244: 
        !           245:     char       *f;                     /* name of the resident font */
        !           246:     int                s;                      /* in this point size */
        !           247:     FILE       *tf;                    /* job's output file */
        !           248: 
        !           249: 
        !           250: {
        !           251: 
        !           252: 
        !           253:     int                i;                      /* loop index for setting famlies */
        !           254: 
        !           255: 
        !           256: /*
        !           257:  *
        !           258:  * Makes sure data about resident font *f in size s is added to the
        !           259:  * fam_data[] array. Essentially the same as routine getrastdata()
        !           260:  * except that the chused bitmap is set to all ones so download()
        !           261:  * will know the printer already has the glyph. Also don't need the
        !           262:  * advance stuff saved in fam_data[].
        !           263:  *
        !           264:  */
        !           265: 
        !           266: 
        !           267:     cur_fam = getfamdata(f, s);                /* using this family next */
        !           268:     fam = &fam_data[cur_fam];
        !           269: 
        !           270:     if ( cur_fam >= next_fam )  {      /* first use */
        !           271:        if ( next_fam > MAXFAMILY )     /* can only use 0 to 95 */
        !           272:            error(FATAL, "job uses too many font families");
        !           273: 
        !           274:        strncpy(fam->name, f, L_FNAME); /* initialize the fields */
        !           275:        fam->name[L_FNAME-1] = '\0';
        !           276:        fam->size = s;
        !           277:        fam->rst = NULL;
        !           278:        fam->advance = NULL;
        !           279:        fam->glyphdir = NULL;
        !           280:        fam->first = 0;
        !           281:        fam->last = 128;
        !           282: 
        !           283:        for ( i = 0; i < 4; i++ )  {
        !           284:            fam->chused[i] = (unsigned char *) rastalloc((MAXMEMBER+BYTE)/BYTE, TRUE, 0377);
        !           285:            fam->fam[i] = -1;
        !           286:        }   /* End for */
        !           287: 
        !           288:        famtables(f, s, tf);            /* use resdata[] to define families */
        !           289: 
        !           290:        next_fam++;
        !           291:     }  /* End if */
        !           292: 
        !           293:     return(cur_fam);                   /* probably never used */
        !           294: 
        !           295: }   /* End of getresdata */
        !           296: 
        !           297: 
        !           298: /*****************************************************************************/
        !           299: 
        !           300: 
        !           301: famtables(f, s, tf)
        !           302: 
        !           303: 
        !           304:     char       *f;                     /* define tables for this font */
        !           305:     int                s;                      /* in this size */
        !           306:     FILE       *tf;                    /* commands written here */
        !           307: 
        !           308: 
        !           309: {
        !           310: 
        !           311: 
        !           312:     int                i;                      /* fonts position in resdata[] */
        !           313:     int                j;                      /* next family pair */
        !           314: 
        !           315: 
        !           316: /*
        !           317:  *
        !           318:  * Defines the family tables for font *f in size s using the data that
        !           319:  * was read from the ASCII control file and saved in resdata[]. We'll
        !           320:  * have to look font f up in resdata[] before doing anything. Although
        !           321:  * that wastes time because it was just done in isresident() it shouldn't
        !           322:  * be all that expensive because the family tables aren't downloaded
        !           323:  * that often. There are easy ways to get around it if you want.
        !           324:  *
        !           325:  */
        !           326: 
        !           327: 
        !           328:     for ( i = 0; i < maxres; i++ )
        !           329:        if ( strncmp(f, resdata[i].name, L_FNAME) == 0 )
        !           330:            break;
        !           331: 
        !           332:     if ( i >= maxres )                 /* probably can't ever happen */
        !           333:        error(FATAL, "can't ffind family data for font %s", f);
        !           334: 
        !           335:     putc(ACFT, tf);
        !           336:     putc(cur_fam, tf);
        !           337:     putc(resdata[i].count, tf);
        !           338: 
        !           339:     for ( j = 0; j < resdata[i].count; j++ )  {
        !           340:        putc(resdata[i].table[j].map, tf);
        !           341:        fprintf(tf, "%.10s%d", resdata[i].table[j].name, s);
        !           342:        putc('\0', tf);
        !           343:     }  /* End for */
        !           344: 
        !           345: }   /* End of famtables */
        !           346: 
        !           347: 
        !           348: /*****************************************************************************/
        !           349: 
        !           350: 
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