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Diffstat (limited to 'Build/source/texk/dvipsk/bbox.c')
-rw-r--r--Build/source/texk/dvipsk/bbox.c502
1 files changed, 502 insertions, 0 deletions
diff --git a/Build/source/texk/dvipsk/bbox.c b/Build/source/texk/dvipsk/bbox.c
new file mode 100644
index 00000000000..b7f2f7e8728
--- /dev/null
+++ b/Build/source/texk/dvipsk/bbox.c
@@ -0,0 +1,502 @@
+/*
+ * Calculates the bounding box for a one-page .dvi file.
+ * Based on a lot of other dvips stuff. Requires a total re-scan
+ * of the page.
+ *
+ * If you request an EPSF file and specify -a, you may end up
+ * processing a single page four times!
+ */
+#include "dvips.h" /* The copyright notice in that file is included too! */
+#include <math.h>
+/*
+ * The external declarations:
+ */
+#include "protos_add.h"
+
+typedef struct {
+ integer llx, lly, urx, ury;
+} bbchardesctype;
+typedef struct {
+ bbchardesctype *bbchardesc;
+} bbfontdesctype;
+typedef struct bbtft {
+ integer fontnum;
+ bbfontdesctype *desc;
+ struct bbtft *next;
+} bbfontmaptype;
+
+static bbfontmaptype *bbffont;
+
+static void
+bbtfmload(register fontdesctype *curfnt)
+{
+ register integer i, j;
+ register integer li, cd = 0;
+ integer scaledsize;
+ integer id, nt = 0;
+ integer nw, nh, nd, ns, hd;
+ integer bc, ec;
+ integer nco = 0, ncw = 0, npc = 0, no_repeats = 0;
+ halfword *index = NULL;
+ halfword *chartype = NULL;
+ 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.
+ */
+ curfnt->dir = 0;
+ id = tfm16();
+ if (id != 0) {
+ font_level = -1;
+ if (id == 9 || id == 11) {
+ if (noptex) badtfm("length");
+ if (id == 9) curfnt->dir = id;
+ nt = tfm16(); li = tfm16();
+ }
+ 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) &&
+ id != 9 && id != 11)
+ 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 (id == 9 || id == 11) {
+ chardat = (integer *) xmalloc(256*sizeof(integer));
+ bbcurfnt->bbchardesc = (bbchardesctype *)
+ xmalloc((MAX_2BYTES_CODE+1)*sizeof(bbchardesctype));
+ for (i=2; i<hd; i++)
+ li = tfm32();
+ index = (halfword *)xmalloc(nt * sizeof(halfword));
+ chartype = (halfword *)xmalloc(nt * sizeof(halfword));
+ li = tfm16();
+ li = tfm16();
+ for (i=1; i<nt; i++) {
+ li = tfm16();
+ index[i] = li;
+ chartype[i] = tfm16();
+ }
+ for (i=0; i<256; i++)
+ chardat[i] = -1;
+ } else {
+ 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 (id == 9 || id == 11) {
+ chardat[i] = tfm16();
+ li = tfm16();
+ } else {
+ 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) {
+ char *msg = concat ("Table size mismatch in ", curfnt->name);
+ error(msg);
+ free(msg);
+ }
+ scaledsize = curfnt->scaledsize;
+ if (id == 9 || id == 11) {
+ scaled = (integer *) xmalloc(300*sizeof(integer));
+ for (i=0; i<nw + nh + nd; i++)
+ scaled[i] = scalewidth(tfm32(), scaledsize);
+ } else {
+ 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();
+ fclose(tfmfile);
+
+ if (id == 9 || id == 11) {
+ for (i=0; i<MAX_2BYTES_CODE+1; i++) {
+ cc = &(bbcurfnt->bbchardesc[i]);
+ if (chardat[0] != -1) {
+ cc->ury = scaled[((chardat[0] >> 4) & 15) + nw];
+ cc->lly = - scaled[(chardat[0] & 15) + nw + nh];
+ cc->llx = 0;
+ cc->urx = curfnt->chardesc[0].TFMwidth;
+ } else {
+ cc->llx = cc->lly = cc->urx = cc->ury = 0;
+ }
+ }
+ for (i=1; i<nt; i++) {
+ cc = &(bbcurfnt->bbchardesc[index[i]]);
+ if (chardat[chartype[i]] != -1) {
+ cc->ury = scaled[((chardat[chartype[i]] >> 4) & 15) + nw];
+ cc->lly = - scaled[(chardat[chartype[i]] & 15) + nw + nh];
+ cc->llx = 0;
+ cc->urx = curfnt->chardesc[index[i]].TFMwidth;
+ } else {
+ cc->llx = cc->lly = cc->urx = cc->ury = 0;
+ }
+ }
+ free(index);
+ free(chartype);
+ } else {
+ 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) {
+ if (id == 9 || id == 11) {
+ for (i=0; i<MAX_2BYTES_CODE+1; 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;
+ }
+ } else {
+ 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);
+}
+static integer llx, lly, urx, ury;
+static void
+bbspecial(integer h, integer v, integer dir, int nbytes)
+{
+ 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 (!dir) {
+ 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);
+ } else {
+ if (llx > h + r[1] / conv)
+ llx = (integer)(h + r[1] / conv);
+ if (lly > v + r[2] / conv)
+ lly = (integer)(v + r[2] / conv);
+ if (urx < h + r[3] / conv)
+ urx = (integer)(h + r[3] / conv);
+ if (ury < v + r[0] / conv)
+ ury = (integer)(v + r[0] / conv);
+ }
+ }
+}
+static void
+bbdopage(void)
+{
+ 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, dir;
+ register fontdesctype *curfnt = 0;
+ register bbfontdesctype *bbcurfnt = 0;
+
+ w = x = y = z = dir = 0;
+ h = 0; v = 0;
+ llx = lly = 1000000000;
+ urx = ury = -1000000000;
+ charmove = 0;
+ while (1) {
+ switch (cmd=dvibyte()) {
+case 138: break;
+case 135: /* put3 */
+ if (noptex) error("! synch");
+ mychar = dvibyte();
+ mychar = (mychar << 8) + dvibyte();
+ mychar = (mychar << 8) + dvibyte();
+ charmove = 0;
+ goto dochar;
+case 130: /* set3 */
+ if (noptex) error("! synch");
+ mychar = dvibyte();
+ mychar = (mychar << 8) + dvibyte();
+ mychar = (mychar << 8) + dvibyte();
+ charmove = 1;
+ goto dochar;
+case 134: /* put2 */
+ if (noomega && noptex) error("! synch");
+ mychar = dvibyte();
+ mychar = (mychar << 8) + dvibyte();
+ charmove = 0;
+ goto dochar;
+case 129: /* set2 */
+ if (noomega && noptex) 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[CD_IDX(mychar)]);
+ if (!dir) {
+ 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;
+ } else {
+ if (h + bcd->ury > urx) urx = h + bcd->ury;
+ if (h + bcd->lly < llx) llx = h + bcd->lly;
+ if (v + bcd->llx < lly) lly = v + bcd->llx;
+ if (v + bcd->urx > ury) ury = v + bcd->urx;
+ }
+ if (charmove) {
+ if (!dir)
+ h += cd->TFMwidth;
+ else
+ v += cd->TFMwidth;
+ }
+ break;
+case 255: /* pTeX's dir or undefined */
+ if (!noptex) {
+ dir = dvibyte();
+ break;
+ }
+case 131: case 136: case 139: /* set4, put4, bop */
+case 247: case 248: case 249: /* pre, post, post_post */
+case 250: case 251: case 252: case 253: case 254: /* undefined */
+ error("! synch");
+case 132: case 137: /* rules */
+ { integer ry, rx;
+ ry = signedquad(); rx = signedquad();
+ if (rx>0 && ry>0) {
+ if (!dir) {
+ 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 {
+ if (h < llx) llx = h;
+ if (v + rx < lly) lly = v + rx;
+ if (h + ry > urx) urx = h + ry;
+ if (v > ury) ury = v;
+ }
+ } else
+ rx = 0;
+ if (cmd != 137) {
+ if (!dir)
+ h += rx;
+ else
+ v += rx;
+ }
+ break;
+ }
+case 141: /* push */
+ sp->h = h; sp->v = v;
+ sp->w = w; sp->x = x; sp->y = y; sp->z = z; sp->dir = dir;
+ 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; dir = sp->dir;
+ break;
+case 143: if (!dir) h += signedbyte(); else v += signedbyte(); break;
+case 144: if (!dir) h += signedpair(); else v += signedpair(); break;
+case 145: if (!dir) h += signedtrio(); else v += signedtrio(); break;
+case 146: if (!dir) h += signedquad(); else v += signedquad(); break;
+case 147: if (!dir) h += w; else v += w; break;
+case 148: if (!dir) h += (w = signedbyte()); else v += (w = signedbyte()); break;
+case 149: if (!dir) h += (w = signedpair()); else v += (w = signedpair()); break;
+case 150: if (!dir) h += (w = signedtrio()); else v += (w = signedtrio()); break;
+case 151: if (!dir) h += (w = signedquad()); else v += (w = signedquad()); break;
+case 152: if (!dir) h += x; else v += x; break;
+case 153: if (!dir) h += (x = signedbyte()); else v += (x = signedbyte()); break;
+case 154: if (!dir) h += (x = signedpair()); else v += (x = signedpair()); break;
+case 155: if (!dir) h += (x = signedtrio()); else v += (x = signedtrio()); break;
+case 156: if (!dir) h += (x = signedquad()); else v += (x = signedquad()); break;
+case 157: if (!dir) v += signedbyte(); else h -= signedbyte(); break;
+case 158: if (!dir) v += signedpair(); else h -= signedpair(); break;
+case 159: if (!dir) v += signedtrio(); else h -= signedtrio(); break;
+case 160: if (!dir) v += signedquad(); else h -= signedquad(); break;
+case 161: if (!dir) v += y; else h -= y; break;
+case 162: if (!dir) v += (y = signedbyte()); else h -= (y = signedbyte()); break;
+case 163: if (!dir) v += (y = signedpair()); else h -= (y = signedpair()); break;
+case 164: if (!dir) v += (y = signedtrio()); else h -= (y = signedtrio()); break;
+case 165: if (!dir) v += (y = signedquad()); else h -= (y = signedquad()); break;
+case 166: if (!dir) v += z; else h += z; break;
+case 167: if (!dir) v += (z = signedbyte()); else h -= (z = signedbyte()); break;
+case 168: if (!dir) v += (z = signedpair()); else h -= (z = signedpair()); break;
+case 169: if (!dir) v += (z = signedtrio()); else h -= (z = signedtrio()); break;
+case 170: if (!dir) v += (z = signedquad()); else h -= (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, dir, (int)dvibyte()); break;
+case 240: bbspecial(h, v, dir, (int)twobytes()); break;
+case 241: bbspecial(h, v, dir, (int)threebytes()); break;
+case 242: bbspecial(h, v, dir, (int)signedquad()); break;
+ }
+ }
+}
+void
+findbb(integer bop)
+{
+ 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
+}