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Annotation of 43BSDTahoe/new/X/libapollo/font.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid_font_c = "$Header: font.c,v 10.1 86/11/29 13:52:01 jg Rel $";
        !             3: #endif lint
        !             4:     /*
        !             5: 
        !             6:     Copyright 1986 by the University of Utah
        !             7: 
        !             8:     Permission to use, copy, modify, and distribute this
        !             9:     software and its documentation for any purpose and without
        !            10:     fee is hereby granted, provided that the above copyright
        !            11:     notice appear in all copies and that both that copyright
        !            12:     notice and this permission notice appear in supporting
        !            13:     documentation, and that the name of the University of Utah
        !            14:     not be used in advertising or publicity pertaining to 
        !            15:     distribution of the software without specific, written 
        !            16:     prior permission. The University of Utah makes no
        !            17:     representations about the suitability of this software for
        !            18:     any purpose.  It is provided "as is" without express or
        !            19:     implied warranty.
        !            20: 
        !            21:     */
        !            22: 
        !            23: /* font.c      Reads a font from a file and stores it on the workstation
        !            24:  *
        !            25:  *     GetFont         Takes a font name and stores it
        !            26:  *     FreeFont        Frees the storage taken by a font
        !            27:  *
        !            28:  */
        !            29: 
        !            30: /*
        !            31:  *     ToDo:
        !            32:  *             Use Sun fonts too
        !            33:  */
        !            34: 
        !            35: #include "Xapollo.h"
        !            36: #include "vssite.h"
        !            37: #include "../libvs100/param.h"
        !            38: #include <errno.h>
        !            39: #include <sys/file.h>
        !            40: 
        !            41: extern int errno;
        !            42: extern int borrow_flag;
        !            43: 
        !            44: char *Xalloc(), *strcpy(), *strcat();
        !            45: long lseek();
        !            46: 
        !            47: #define CHARPERFONT 256
        !            48: 
        !            49: static short ReverseBitsInByte[256] = {
        !            50: 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
        !            51: 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
        !            52: 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
        !            53: 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
        !            54: 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
        !            55: 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
        !            56: 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
        !            57: 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
        !            58: 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
        !            59: 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
        !            60: 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
        !            61: 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
        !            62: 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
        !            63: 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
        !            64: 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
        !            65: 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
        !            66: };
        !            67: 
        !            68: #define ReverseBitsInShort(s) ((ReverseBitsInByte[(s)&0xff]<<8)|ReverseBitsInByte[((s)>>8)&0xff])
        !            69: 
        !            70: 
        !            71: FONT *GetFont (name)
        !            72:        char *name;
        !            73: {
        !            74:        char fontname[256];
        !            75:        int fontfile = -1;
        !            76:        FontData font;
        !            77: #define chars ((BitMap *) font.f_characters)
        !            78:        int fontsize, leftsize, width, i, j;
        !            79:        char *fontarea;
        !            80:        register short *leftarea, *leftarray;
        !            81:        register FONT *fd;
        !            82:        register FontPriv *fpriv;
        !            83:        int tablesize = (CHARPERFONT + 1) * sizeof(short);
        !            84:        extern char *getenv(), *index();
        !            85:        static char *Fontpath = NULL;
        !            86:        char *fontpath;
        !            87:        char lname[64];
        !            88:        int namelen;
        !            89: 
        !            90:        strcpy( lname, DEFAULT_APOLLO_FONT_PATH);
        !            91:        strcat( lname, name );
        !            92:        fontfile = access (lname, F_OK);
        !            93:        if (fontfile == 0) {
        !            94:          short fid;
        !            95:          gpr_$offset_t size;
        !            96:          status_$t status;
        !            97: 
        !            98:          fd = (FONT *) Xalloc (sizeof (FONT));
        !            99: 
        !           100:          fd->name = (char *) Xalloc (strlen (name) + 1);
        !           101:          strcpy (fd->name, name);
        !           102: 
        !           103:          fpriv = (FontPriv *) Xalloc (sizeof (FontPriv));
        !           104: 
        !           105:          fd->fixed = 1;
        !           106:          fd->data = (caddr_t) fpriv;
        !           107: 
        !           108:          fpriv->widths = NULL;
        !           109:          fpriv->leftarray = NULL;
        !           110: 
        !           111:          namelen = strlen(lname);
        !           112:          gpr_$load_font_file(*lname, (short)namelen, (short)fid, status);
        !           113:          check_status(status, "Getfont");   
        !           114:          gpr_$set_text_font( fid, status);
        !           115:          gpr_$inq_text_extent("W", 1, size, status);
        !           116:          fd->height = size.y_size;
        !           117:          fd->avg_width = size.x_size;
        !           118:          fpriv->maxwidth = size.x_size;
        !           119: 
        !           120:          fd->first = '\0';
        !           121:          fd->last = '\177';
        !           122:          fd->base = 0;
        !           123:          fd->space = 0;
        !           124:          fd->refcnt = 1;
        !           125:          fpriv->ap_font_id = fid;
        !           126:          fpriv->ap_font = true;
        !           127: /*  Now load inverse version of font
        !           128:  */
        !           129:          strcat(lname, ".i");
        !           130:          namelen = strlen(lname);
        !           131:          gpr_$load_font_file(*lname, (short)namelen, (short)fid, status);
        !           132:          check_status(status, "GetFont: ");   
        !           133:          fpriv->ap_font_id_inv = fid;
        !           134:       if (!borrow_flag) {
        !           135:        fpriv->ap_font_id_inv = fpriv->ap_font_id;
        !           136:         fpriv->ap_font_id = fid;
        !           137:         }
        !           138:        }            
        !           139:        else {
        !           140:          if (!Fontpath) {
        !           141:            char *temp = getenv("XFONTPATH");
        !           142: 
        !           143:            if (temp) {
        !           144:              Fontpath = Xalloc(strlen(temp) + 1);
        !           145:              strcpy(Fontpath, temp);
        !           146:            }
        !           147:          }
        !           148:        
        !           149:          if ((fontpath = Fontpath) == NULL)
        !           150:            fontpath = DEFAULT_FONT_PATH;
        !           151: 
        !           152:          fontfile = open (name, 0, 0);
        !           153: 
        !           154:          while (fontfile < 0) {
        !           155:            char *fend;
        !           156: 
        !           157:            if ((fend = index(fontpath, ':')) != 0)
        !           158:              *fend = '\0';
        !           159:            if (*fontpath == '\0') {
        !           160:              errno = EINVAL;
        !           161:              return (NULL);
        !           162:            }
        !           163:            
        !           164:            if (*fontpath == '~') {
        !           165:              /* XXX - should implement ~foobar as well */
        !           166:              strcpy (fontname, getenv("HOME"));
        !           167:              strcat (fontname, "/");
        !           168:              fontpath++;
        !           169:            } else
        !           170:              *fontname = '\0';
        !           171:            strcat (fontname, fontpath);
        !           172:            strcat (fontname, "/");
        !           173:            strcat (fontname, name);
        !           174:            strcat (fontname, DEFAULT_FONT_SUFFIX);
        !           175: 
        !           176:            fontfile = open (fontname, 0, 0);
        !           177:            if (fend) {
        !           178:              *fend = ':';
        !           179:              fontpath = ++fend;
        !           180:            } else
        !           181:              break;
        !           182:          }
        !           183:          if (read (fontfile, (caddr_t) &font, sizeof (FontData)) != sizeof (FontData)) {
        !           184:            close (fontfile);
        !           185:            errno = EINVAL;
        !           186:            return (NULL);
        !           187:          }
        !           188:          Swap_shorts((short *) &font, sizeof (FontData)>>1);
        !           189: 
        !           190:          fontsize = BitmapSize(chars->bm_width, chars->bm_height);
        !           191:          fontarea = (char *) Xalloc (fontsize);
        !           192:          bzero( fontarea, fontsize );
        !           193:          lseek (fontfile, (long) font.f_characters[0], 0);
        !           194:          if (read (fontfile, fontarea, fontsize) != fontsize) {
        !           195:            close (fontfile);
        !           196:            free (fontarea);
        !           197:            errno = EINVAL;
        !           198:            return (NULL);
        !           199:          }
        !           200:          Swap_shorts((short *)fontarea, fontsize>>1);
        !           201: 
        !           202:          leftarea  = (short *) Xalloc (tablesize);
        !           203:          bzero(leftarea, tablesize);
        !           204:          leftarray = (short *) Xalloc (tablesize);
        !           205:          if (font.f_fixedWidth == 0) {
        !           206:            leftsize = (font.f_lastChar - font.f_firstChar + 2) * sizeof (short);
        !           207:            lseek (fontfile, (long) font.f_leftArray[0], 0);
        !           208:            if (read (fontfile, & leftarea[font.f_firstChar], leftsize) 
        !           209:                != leftsize) {
        !           210:                  close (fontfile);
        !           211:                  free (fontarea);
        !           212:                  free ((caddr_t) leftarea);
        !           213:                  free ((caddr_t) leftarray);
        !           214:                  errno = EINVAL;
        !           215:                  return (NULL);
        !           216:                }
        !           217:            Swap_shorts(((short *)& leftarea[font.f_firstChar]), leftsize>>1);
        !           218:          } else { /* if fixed width font, generate leftarray for use later */
        !           219:            j = 0;
        !           220:            for (i = font.f_firstChar; i <= font.f_lastChar + 1; i++) {
        !           221:              leftarea[i] = j;
        !           222:              j += font.f_fixedWidth;
        !           223:            }
        !           224:          }
        !           225:          bcopy(leftarea, leftarray, tablesize);
        !           226: 
        !           227:          close (fontfile);
        !           228:     /*
        !           229:      *  set up font data structures
        !           230:      */
        !           231: 
        !           232:          fd = (FONT *) Xalloc (sizeof (FONT));
        !           233: 
        !           234:          fd->height = chars->bm_height;
        !           235:          fd->first = font.f_firstChar;
        !           236:          fd->last = font.f_lastChar;
        !           237:          fd->base = font.f_baseline;
        !           238:          fd->space = font.f_spaceIndex;
        !           239:          fd->space += fd->first;
        !           240:          fd->refcnt = 1;
        !           241: 
        !           242: 
        !           243:          fd->name = (char *) Xalloc (strlen (name) + 1);
        !           244:          strcpy (fd->name, name);
        !           245: 
        !           246:     /*
        !           247:      * set up the private font structure
        !           248:      */
        !           249:          fpriv = (FontPriv *) Xalloc (sizeof (FontPriv));
        !           250: 
        !           251:          if (fd->avg_width = font.f_fixedWidth) {
        !           252:            fd->fixed = 1;
        !           253:            fpriv->maxwidth = fd->avg_width;
        !           254:          }
        !           255:          else
        !           256:            fd->fixed = 0;
        !           257:          fd->data = (caddr_t) fpriv;
        !           258: 
        !           259:          fpriv->widths = leftarea;
        !           260:          fpriv->leftarray = leftarray;
        !           261:          fpriv->maxwidth = 0;
        !           262: 
        !           263: /*  of course... the bits are all switched...  */
        !           264:          {   register short *sh = (short *) fontarea;
        !           265:              register short limit = ((chars->bm_width+15)>>4)*chars->bm_height;
        !           266:              do *sh = ReverseBitsInShort(*sh), sh++;
        !           267:              while (--limit != -1);
        !           268:            }
        !           269: 
        !           270: /* convert the leftarray to the width table */
        !           271:          for (i = fd->first; i <= fd->last; i++) {
        !           272:            width = fpriv->leftarray[i + 1] - fpriv->leftarray[i];
        !           273:            if (width > fpriv->maxwidth) fpriv->maxwidth = width;
        !           274:            if (width < 0) {
        !           275:              width = 0;        /* font sanity check */
        !           276:              errno = EINVAL;
        !           277:              return(NULL);
        !           278:            }
        !           279:            fpriv->widths[i] = width;
        !           280:          }
        !           281:          fd->avg_width = ((fpriv->leftarray[fd->last]  - 
        !           282:                            fpriv->leftarray[fd->first]) / (fd->last - fd->first));
        !           283:          
        !           284:          if ((fpriv->strike = make_bitmap( fontarea, chars->bm_width, chars->bm_height) ) == NULL) {
        !           285:            free (fontarea);
        !           286:            free ((caddr_t) leftarea);
        !           287:            free ((caddr_t) leftarray);
        !           288:            free ((caddr_t) fd);
        !           289:            free ((caddr_t) fpriv);
        !           290:            errno = EINVAL;
        !           291:            return (NULL);
        !           292:          }
        !           293: 
        !           294: /*    make_fontmap(fd); */
        !           295:     /*  XXX free fontarea */
        !           296: 
        !           297: #undef chars
        !           298:        }
        !           299:        return (fd);
        !           300:       }
        !           301: 
        !           302: FreeFont (font)
        !           303:        register FONT *font;
        !           304: {
        !           305:     FontPriv   * fp;
        !           306:     status_$t status;
        !           307: 
        !           308:     fp = (FontPriv *)font->data;
        !           309:     if (fp->ap_font)
        !           310:       gpr_$unload_font_file((short)fp->ap_font_id, status);
        !           311: 
        !           312:     free ((caddr_t) font->data);
        !           313:     free (font->name);
        !           314:     free ((caddr_t) font);
        !           315: }

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