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tetex-bin  3.0
Classes | Typedefs | Functions | Variables
bbox.c File Reference
#include "dvips.h"
#include <math.h>
#include "protos.h"

Go to the source code of this file.

Classes

struct  bbchardesctype
struct  bbfontdesctype
struct  bbtft
struct  dvistack

Typedefs

typedef struct bbtft bbfontmaptype

Functions

void bbtfmload P1C (register fontdesctype *, curfnt)
void bbspecial P3C (integer, h, integer, v, int, nbytes)
void bbdopage ()
void findbb P1C (integer, bop)

Variables

char * nextstring
char errbuf []
FILEtfmfile
FILEdvifile
fontmaptypeffont
integer firstboploc
integer num
integer den
double mag
integer hoff
integer voff
Boolean noomega
static bbfontmaptypebbffont
struct dvistack stack []
static integer llx
static integer lly
static integer urx
static integer ury

Class Documentation

struct bbchardesctype

Definition at line 21 of file bbox.c.

Class Members
integer llx
integer lly
integer urx
integer ury
struct bbfontdesctype

Definition at line 24 of file bbox.c.

Collaboration diagram for bbfontdesctype:
Class Members
bbchardesctype * bbchardesc
struct bbtft

Definition at line 27 of file bbox.c.

Collaboration diagram for bbtft:
Class Members
bbfontdesctype * desc
integer fontnum
struct bbtft * next
struct dvistack

Definition at line 175 of file bbox.c.

Class Members
integer h
integer hh
integer v
integer vv
integer w
integer x
integer y
integer z

Typedef Documentation

typedef struct bbtft bbfontmaptype

Function Documentation

Definition at line 196 of file bbox.c.

{
   register shalfword cmd ;
   register bbchardesctype *bcd ;
   register chardesctype *cd ;
   register integer h ;
   register fontmaptype *cfnt ;
   bbfontmaptype *bbcfnt ;
   integer fnt ;
    integer mychar ;
   int charmove ;
   struct dvistack *sp = stack ;
   integer v, w, x, y, z ;
   register fontdesctype *curfnt = 0 ;
   register bbfontdesctype *bbcurfnt = 0 ;

   w = x = y = z = 0 ;
   h = 0 ; v = 0 ;
   llx = lly = 1000000000 ;
   urx = ury = -1000000000 ;
   charmove = 0 ;
   while (1) {
      switch (cmd=dvibyte()) {
case 138: break ;
case 134: /* put2 */
         if (noomega) error("! synch") ;
         mychar = dvibyte() ;
         mychar = (mychar << 8) + dvibyte() ;
         charmove = 0 ;
         goto dochar ;
case 129: /* set2 */
         if (noomega) error("! synch") ;
         mychar = dvibyte() ;
         mychar = (mychar << 8) + dvibyte() ;
         charmove = 1;
         goto dochar ;
case 133: /* put1 */
         mychar = dvibyte() ;
         charmove = 0 ;
         goto dochar ;
case 128: cmd = dvibyte() ; /* set1 command drops through to setchar */
default: /* these are commands 0 (setchar0) thru 127 (setchar127) */
         mychar = cmd ;
         charmove = 1 ;
dochar:
         cd = &(curfnt->chardesc[mychar]) ;
         bcd = &(bbcurfnt->bbchardesc[mychar]) ;
         if (h + bcd->llx < llx) llx = h + bcd->llx ;
         if (h + bcd->urx > urx) urx = h + bcd->urx ;
         if (v - bcd->ury < lly) lly = v - bcd->ury ;
         if (v - bcd->lly > ury) ury = v - bcd->lly ;
         if (charmove)
            h += cd->TFMwidth ;
         break ;
case 130: case 131: case 135: case 136: case 139: 
case 247: case 248: case 249: case 250: case 251: case 252: case 253:
case 254: case 255: /* unimplemented or illegal commands */
         error("! synch") ;
case 132: case 137: /* rules */
         {  integer ry, rx ;
            ry = signedquad() ; rx = signedquad() ;
            if (rx>0 && ry>0) {
               if (h < llx) llx = h ;
               if (v - ry < lly) lly = v - ry ;
               if (h + rx > urx) urx = h + rx ;
               if (v > ury) ury = v ;
            } else
               rx = 0 ;
            if (cmd != 137)
               h += rx ;
            break ;
         }
case 141: /* push */
         sp->h = h ; sp->v = v ;
         sp->w = w ; sp->x = x ; sp->y = y ; sp->z = z ;
         if (++sp >= &stack[STACKSIZE]) error("! Out of stack space") ;
         break ;
case 140: /* eop or end of virtual character */
         return ;
case 142: /* pop */
         if (--sp < stack) error("! More pops than pushes") ;
         h = sp->h ; v = sp->v ;
         w = sp->w ; x = sp->x ; y = sp->y ; z = sp->z ;
         break ;
case 143: h += signedbyte() ; break ;
case 144: h += signedpair() ; break ;
case 145: h += signedtrio() ; break ;
case 146: h += signedquad() ; break ;
case 147: h += w ; break ;
case 148: h += (w = signedbyte()) ; break ;
case 149: h += (w = signedpair()) ; break ;
case 150: h += (w = signedtrio()) ; break ;
case 151: h += (w = signedquad()) ; break ;
case 152: h += x ; break ;
case 153: h += (x = signedbyte()) ; break ;
case 154: h += (x = signedpair()) ; break ;
case 155: h += (x = signedtrio()) ; break ;
case 156: h += (x = signedquad()) ; break ;
case 157: v += signedbyte() ; break ;
case 158: v += signedpair() ; break ;
case 159: v += signedtrio() ; break ;
case 160: v += signedquad() ; break ;
case 161: v += y ; break ;
case 162: v += (y = signedbyte()) ; break ;
case 163: v += (y = signedpair()) ; break ;
case 164: v += (y = signedtrio()) ; break ;
case 165: v += (y = signedquad()) ; break ;
case 166: v += z ; break ;
case 167: v += (z = signedbyte()) ; break ;
case 168: v += (z = signedpair()) ; break ;
case 169: v += (z = signedtrio()) ; break ;
case 170: v += (z = signedquad()) ; break ;
case 171: case 172: case 173: case 174: case 175: case 176: case 177:
case 178: case 179: case 180: case 181: case 182: case 183: case 184:
case 185: case 186: case 187: case 188: case 189: case 190: case 191:
case 192: case 193: case 194: case 195: case 196: case 197: case 198:
case 199: case 200: case 201: case 202: case 203: case 204: case 205:
case 206: case 207: case 208: case 209: case 210: case 211: case 212:
case 213: case 214: case 215: case 216: case 217: case 218: case 219:
case 220: case 221: case 222: case 223: case 224: case 225: case 226:
case 227: case 228: case 229: case 230: case 231: case 232: case 233:
case 234: case 235: case 236: case 237: case 238: /* font selection commands */
         if (cmd < 235) fnt = cmd - 171 ; /* fntnum0 thru fntnum63 */
         else {
            fnt = dvibyte() ;
            while (cmd-- > 235)
               fnt = (fnt << 8) + dvibyte() ;
         }
         for (cfnt=ffont; cfnt; cfnt = cfnt->next)
            if (cfnt->fontnum == fnt) break ;
         curfnt = cfnt->desc ;
         for (bbcfnt=bbffont; bbcfnt; bbcfnt = bbcfnt->next)
            if (bbcfnt->fontnum == fnt) goto fontfound ;
         bbcfnt = (bbfontmaptype *)mymalloc(sizeof(bbfontmaptype)) ;
         bbcfnt->fontnum = fnt ;
         bbcfnt->next = bbffont ;
         bbffont = bbcfnt ;
         bbtfmload(curfnt) ;
fontfound: bbcurfnt = bbcfnt->desc ;
         break ;
case 243: case 244: case 245: case 246: /*fntdef1 */
         skipover(cmd - 230) ;
         skipover(dvibyte() + dvibyte()) ;
         break ;
case 239: bbspecial(h, v, (int)dvibyte()) ; break ;
case 240: bbspecial(h, v, (int)twobytes()) ; break ;
case 241: bbspecial(h, v, (int)threebytes()) ; break ;
case 242: bbspecial(h, v, (int)signedquad()) ; break ;
      }
   }
}

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void bbtfmload P1C ( register fontdesctype ,
curfnt   
)

Definition at line 35 of file bbox.c.

{
   register integer i, j ;
   register integer li, cd = 0 ;
   integer scaledsize ;
   integer nw, nh, nd, ns, hd ;
   integer bc, ec ;
   integer nco = 0, ncw = 0, npc = 0, no_repeats = 0 ;
   integer *scaled ;
   integer *chardat ;
   int font_level;
   integer pretend_no_chars;
   integer slant = 0 ;
   bbchardesctype *cc ;
   register bbfontdesctype *bbcurfnt =
      (bbfontdesctype *)mymalloc(sizeof(bbfontdesctype)) ;

   bbffont->desc = bbcurfnt ;
   tfmopen(curfnt) ;
/*
 *   Next, we read the font data from the tfm file, and store it in
 *   our own arrays.
 */
   li = tfm16() ;
   if (li!=0) {
      font_level = -1;
      hd = tfm16() ;
      bc = tfm16() ; ec = tfm16() ;
      nw = tfm16() ; nh = tfm16(); nd = tfm16();
      ns = tfm16() ;
      ns += tfm16() ;
      ns += tfm16() ;
      ns += tfm16() ;
      li = tfm16() ;
      if (hd<2 || bc>ec+1 || ec>255 || nw>256 || nh>16 || nd>16)
         badtfm("header") ;
   } else {  /* In an .ofm file */
      if (noomega) badtfm("length") ;
      font_level = tfm16();
      li = tfm32() ;
      hd = tfm32() ;
      bc = tfm32() ; ec = tfm32() ;
      nw = tfm32() ; nh = tfm32() ; nd = tfm32();
      ns = tfm32() ;
      ns += tfm32() ;
      ns += tfm32() ;
      ns += tfm32() ;
      li = tfm32() ;
      li = tfm32() ;
      if (font_level>1 || hd<2 || bc<0 || ec<0 || nw<2 || nh<1 || nd<1 || ns<1
                       || bc>ec+1 || ec>65535 || nw>65536 || nh>256 || nd>256)
         badtfm("header") ;
      if (font_level==1) {
        nco = tfm32() ;
        ncw = tfm32() ;
        npc = tfm32() ;
        for (i=0; i<12; i++) li=tfm32();
      }
   }
   li = tfm32() ;
   check_checksum (li, curfnt->checksum, curfnt->name);

   li = tfm32() ;
   pretend_no_chars=ec+1;
   if (pretend_no_chars<256) pretend_no_chars=256;
   bbcurfnt->bbchardesc = (bbchardesctype *)
                          xmalloc(pretend_no_chars*sizeof(bbchardesctype));
   for (i=2; i<((font_level==1)?nco-29:hd); i++)
      li = tfm32() ;
   chardat = (integer *) xmalloc(pretend_no_chars*sizeof(integer)) ;
   for (i=0; i<pretend_no_chars; i++)
      chardat[i] = -1 ;
   for (i=bc; i<=ec; i++) {
      if (no_repeats>0) {
         no_repeats-- ;
      } else if (font_level>=0) {
         cd = tfm32() ;
         li = tfm32() ;
         if (font_level==1) {
            no_repeats = tfm16() ;
            for (j=0; j<(npc|1); j++) tfm16() ;
            ncw -= 3 + npc/2 ;
         }
      } else {
         cd = tfm16() ;
         li = tfm16() ;
      }
      if (cd) chardat[i] = cd ;
   }
   if (font_level==1&&ncw!=0) {
      sprintf(errbuf, "Table size mismatch in %s", curfnt->name) ;
      error(errbuf) ;
   }
   scaledsize = curfnt->scaledsize ;
   scaled = (integer *) xmalloc((nh + nd)*sizeof(integer)) ;
   for (i=0; i<nw; i++)
      tfm32() ;
   for (i=0; i<nh + nd; i++)
      scaled[i] = scalewidth(tfm32(), scaledsize) ;
   for (i=0; i<ns; i++)
      tfm32() ;
   slant = tfm32() ;
   (void)fclose(tfmfile) ;
   for (i=0; i<pretend_no_chars; i++) {
      cc = &(bbcurfnt->bbchardesc[i]) ;
      if (chardat[i] != -1) {
         halfword iw ;
         int ih, id ;
         if (font_level>=0) {
            iw = chardat[i] >> 16 ;
            ih = (chardat[i] >> 8) & 255 ;
            id = chardat[i] & 255 ;
         } else {
            iw = chardat[i] >> 8 ;
            ih = (chardat[i] >> 4) & 15 ;
            id = chardat[i] & 15 ;
         }
         if (iw>=nw || ih>=nh || id>=nd) badtfm("char info") ;
         cc->ury = scaled[ih] ;
         cc->lly = - scaled[nh + id] ;
         cc->llx = 0 ;
         cc->urx = curfnt->chardesc[i].TFMwidth ;
      } else {
         cc->llx = cc->lly = cc->urx = cc->ury = 0 ;
      }
   }
   if (slant) {
      for (i=0; i<pretend_no_chars; i++) {
         cc = &(bbcurfnt->bbchardesc[i]) ;
         li = scalewidth(cc->lly, slant) ;
         if (slant > 0) cc->llx += li ;
         else cc->urx += li ;
         li = scalewidth(cc->ury, slant) ;
         if (slant > 0) cc->urx += li ;
         else cc->llx += li ;
      }
   }
   free(chardat) ;
   free(scaled) ;
}

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void findbb P1C ( integer  ,
bop   
)

Definition at line 347 of file bbox.c.

{
   integer curpos = ftell(dvifile) ;
   real conv = 72.0 * (real)num / (real)den * (real)mag / 254000000.0 ;
   real off = 72.0 / conv ;
   real margin = 1.0 / conv ;
   real vsize = 792.0 / conv ;
   real hadj = -72.0 * hoff / 4736286.72 ;
   real vadj = 72.0 * voff / 4736286.72 ;

   fseek(dvifile, bop, 0) ;
   bbdopage() ;
   fseek(dvifile, curpos, 0) ;
   lly = (int) (vsize - 2 * off - lly) ;
   ury = (int) (vsize - 2 * off - ury) ;
   llx = (int)floor((llx + off - margin) * conv - hadj + 0.5) ;
   lly = (int)floor((lly + off + margin) * conv - vadj + 0.5) ;
   urx = (int)floor((urx + off + margin) * conv - hadj + 0.5) ;
   ury = (int)floor((ury + off - margin) * conv - vadj + 0.5) ;
/* no marks on the page? */
   if (llx >= urx || lly <= ury)
      llx = lly = urx = ury = 72 ;
#ifdef SHORTINT
   sprintf(nextstring, "%ld %ld %ld %ld", llx, ury, urx, lly) ;
#else
   sprintf(nextstring, "%d %d %d %d", llx, ury, urx, lly) ;
#endif
}

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void bbspecial P3C ( integer  ,
h  ,
integer  ,
v  ,
int  ,
nbytes   
)

Definition at line 180 of file bbox.c.

{
   float *r = bbdospecial(nbytes) ;
   if (r) {
      /* convert from magnified PostScript units back to scaled points */
      real conv = 72.0 * (real)num / (real)den * (real)mag / 254000000.0 ;
      if (llx > h + r[0] / conv)
         llx = (integer) (h + r[0] / conv) ;
      if (lly > v - r[3] / conv)
         lly = (integer) (v - r[3] / conv) ;
      if (urx < h + r[2] / conv)
         urx = (integer) (h + r[2] / conv) ;
      if (ury < v - r[1] / conv)
         ury = (integer) (v - r[1] / conv) ;
   }
}

Variable Documentation

Definition at line 33 of file bbox.c.

Definition at line 592 of file dvi2xx.h.

Definition at line 93 of file dvips.c.

char errbuf[]

Definition at line 42 of file loadfont.c.

Definition at line 96 of file dvips.c.

Definition at line 85 of file dvips.c.

Definition at line 83 of file dvips.c.

integer llx [static]

Definition at line 179 of file bbox.c.

integer lly [static]

Definition at line 179 of file bbox.c.

double mag

Definition at line 598 of file dvi2xx.h.

char* nextstring

Definition at line 92 of file dvips.c.

Definition at line 115 of file dvips.c.

Definition at line 1386 of file png.h.

struct dvistack stack[]

Definition at line 27 of file tfmload.c.

integer urx [static]

Definition at line 179 of file bbox.c.

integer ury [static]

Definition at line 179 of file bbox.c.

Definition at line 83 of file dvips.c.