/*
* True Type Font to Adobe Type 1 font converter
* By Mark Heath <mheath@netspace.net.au>
* Based on ttf2pfa by Andrew Weeks <ccsaw@bath.ac.uk>
* With help from Frank M. Siegert <fms@this.net>
*
* see COPYRIGHT
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <ctype.h>
#include <math.h>
#ifndef WINDOWS
# include <unistd.h>
# include <netinet/in.h>
#else
# include "windows.h"
#endif
#include "ttf.h"
#include "pt1.h"
#include "global.h"
/* prototypes of call entries */
static void openfont(char *fname, char *arg);
static void closefont( void);
static int getnglyphs ( void);
static int glnames( GLYPH *glyph_list);
static void glmetrics( GLYPH *glyph_list);
static int glenc( GLYPH *glyph_list, int *encoding, int *unimap);
static void fnmetrics( struct font_metrics *fm);
static void glpath( int glyphno, GLYPH *glyph_list);
static void kerning( GLYPH *glyph_list);
/* globals */
/* front-end descriptor */
struct frontsw ttf_sw = {
/*name*/ "ttf",
/*descr*/ "built-in TTF support",
/*suffix*/ { "ttf" },
/*open*/ openfont,
/*close*/ closefont,
/*nglyphs*/ getnglyphs,
/*glnames*/ glnames,
/*glmetrics*/ glmetrics,
/*glenc*/ glenc,
/*fnmetrics*/ fnmetrics,
/*glpath*/ glpath,
/*kerning*/ kerning,
};
/* statics */
static FILE *ttf_file;
static int ttf_nglyphs, long_offsets;
static TTF_DIRECTORY *directory;
static TTF_DIR_ENTRY *dir_entry;
static char *filebuffer;
static char *filebuffer_end;
static TTF_NAME *name_table = NULL;
static TTF_NAME_REC *name_record;
static TTF_HEAD *head_table = NULL;
static TTF_HHEA *hhea_table = NULL;
static TTF_KERN *kern_table = NULL;
static TTF_CMAP *cmap_table = NULL;
static LONGHORMETRIC *hmtx_table = NULL;
static TTF_GLYF *glyf_table;
static BYTE *glyf_start = NULL;
static TTF_MAXP *maxp_table = NULL;
static TTF_POST_HEAD *post_table = NULL;
static union {
USHORT *sp;
ULONG *lp;
} loca_table;
#define short_loca_table loca_table.sp
#define long_loca_table loca_table.lp
static short cmap_n_segs;
static USHORT *cmap_seg_start, *cmap_seg_end;
static short *cmap_idDelta, *cmap_idRangeOffset;
static TTF_CMAP_FMT0 *encoding0;
static int enc_type;
static char *name_fields[8];
static int enc_found_ms, enc_found_mac;
static char *mac_glyph_names[258] = {
".notdef", ".null", "CR",
"space", "exclam", "quotedbl", "numbersign",
"dollar", "percent", "ampersand", "quotesingle",
"parenleft", "parenright", "asterisk", "plus",
"comma", "hyphen", "period", "slash",
"zero", "one", "two", "three",
"four", "five", "six", "seven",
"eight", "nine", "colon", "semicolon",
"less", "equal", "greater", "question",
"at", "A", "B", "C",
"D", "E", "F", "G",
"H", "I", "J", "K",
"L", "M", "N", "O",
"P", "Q", "R", "S",
"T", "U", "V", "W",
"X", "Y", "Z", "bracketleft",
"backslash", "bracketright", "asciicircum", "underscore",
"grave", "a", "b", "c",
"d", "e", "f", "g",
"h", "i", "j", "k",
"l", "m", "n", "o",
"p", "q", "r", "s",
"t", "u", "v", "w",
"x", "y", "z", "braceleft",
"bar", "braceright", "asciitilde", "Adieresis",
"Aring", "Ccedilla", "Eacute", "Ntilde",
"Odieresis", "Udieresis", "aacute", "agrave",
"acircumflex", "adieresis", "atilde", "aring",
"ccedilla", "eacute", "egrave", "ecircumflex",
"edieresis", "iacute", "igrave", "icircumflex",
"idieresis", "ntilde", "oacute", "ograve",
"ocircumflex", "odieresis", "otilde", "uacute",
"ugrave", "ucircumflex", "udieresis", "dagger",
"degree", "cent", "sterling", "section",
"bullet", "paragraph", "germandbls", "registered",
"copyright", "trademark", "acute", "dieresis",
"notequal", "AE", "Oslash", "infinity",
"plusminus", "lessequal", "greaterequal", "yen",
"mu", "partialdiff", "summation", "product",
"pi", "integral", "ordfeminine", "ordmasculine",
"Omega", "ae", "oslash", "questiondown",
"exclamdown", "logicalnot", "radical", "florin",
"approxequal", "increment", "guillemotleft", "guillemotright",
"ellipsis", "nbspace", "Agrave", "Atilde",
"Otilde", "OE", "oe", "endash",
"emdash", "quotedblleft", "quotedblright", "quoteleft",
"quoteright", "divide", "lozenge", "ydieresis",
"Ydieresis", "fraction", "currency", "guilsinglleft",
"guilsinglright", "fi", "fl", "daggerdbl",
"periodcentered", "quotesinglbase", "quotedblbase", "perthousand",
"Acircumflex", "Ecircumflex", "Aacute", "Edieresis",
"Egrave", "Iacute", "Icircumflex", "Idieresis",
"Igrave", "Oacute", "Ocircumflex", "applelogo",
"Ograve", "Uacute", "Ucircumflex", "Ugrave",
"dotlessi", "circumflex", "tilde", "macron",
"breve", "dotaccent", "ring", "cedilla",
"hungarumlaut", "ogonek", "caron", "Lslash",
"lslash", "Scaron", "scaron", "Zcaron",
"zcaron", "brokenbar", "Eth", "eth",
"Yacute", "yacute", "Thorn", "thorn",
"minus", "multiply", "onesuperior", "twosuperior",
"threesuperior", "onehalf", "onequarter", "threequarters",
"franc", "Gbreve", "gbreve", "Idot",
"Scedilla", "scedilla", "Cacute", "cacute",
"Ccaron", "ccaron", "dmacron"
};
/* other prototypes */
static void draw_composite_glyf( GLYPH *g, GLYPH *glyph_list, int glyphno,
double *matrix, int level);
static void draw_simple_glyf( GLYPH *g, GLYPH *glyph_list, int glyphno,
double *matrix);
static double f2dot14( short x);
/* get the TTF description table address and length for this index */
static void
get_glyf_table(
int glyphno,
TTF_GLYF **tab,
int *len
)
{
if(tab!=NULL) {
if (long_offsets) {
*tab = (TTF_GLYF *) (glyf_start + ntohl(long_loca_table[glyphno]));
} else {
*tab = (TTF_GLYF *) (glyf_start + (ntohs(short_loca_table[glyphno]) << 1));
}
}
if(len!=NULL) {
if (long_offsets) {
*len = ntohl(long_loca_table[glyphno + 1]) - ntohl(long_loca_table[glyphno]);
} else {
*len = (ntohs(short_loca_table[glyphno + 1]) - ntohs(short_loca_table[glyphno])) << 1;
}
}
}
static void
handle_name(void)
{
int j, k, lang, len, platform;
char *p, *string_area;
int found3 = 0;
string_area = (char *) name_table + ntohs(name_table->offset);
name_record = &(name_table->nameRecords);
for (j = 0; j < 8; j++) {
name_fields[j] = "";
}
for (j = 0; j < ntohs(name_table->numberOfNameRecords); j++) {
platform = ntohs(name_record->platformID);
if (platform == 3) {
found3 = 1;
lang = ntohs(name_record->languageID) & 0xff;
len = ntohs(name_record->stringLength);
if (lang == 0 || lang == 9) {
k = ntohs(name_record->nameID);
if (k < 8) {
p = string_area + ntohs(name_record->stringOffset);
name_fields[k] = dupcnstring(p, len);
}
}
}
name_record++;
}
string_area = (char *) name_table + ntohs(name_table->offset);
name_record = &(name_table->nameRecords);
if (!found3) {
for (j = 0; j < ntohs(name_table->numberOfNameRecords); j++) {
platform = ntohs(name_record->platformID);
if (platform == 1) {
found3 = 1;
lang = ntohs(name_record->languageID) & 0xff;
len = ntohs(name_record->stringLength);
if (lang == 0 || lang == 9) {
k = ntohs(name_record->nameID);
if (k < 8) {
p = string_area + ntohs(name_record->stringOffset);
name_fields[k] = dupcnstring(p, len);
}
}
}
name_record++;
}
}
if (!found3) {
fprintf(stderr, "**** Cannot decode font name fields ****\n");
exit(1);
}
if (name_fields[4][0] == 0) { /* Full Name empty, use Family Name */
name_fields[4] = name_fields[1];
}
if (name_fields[6][0] == 0) { /* Font Name empty, use Full Name */
name_fields[6] = name_fields[4];
if (name_fields[6][0] == 0) { /* oops, empty again */
WARNING_1 fprintf(stderr, "Font name is unknown, setting to \"Unknown\"\n");
name_fields[6] = "Unknown";
}
}
p = name_fields[6];
/* must not start with a digit */
if(isdigit(*p))
*p+= 'A'-'0'; /* change to a letter */
while (*p != '\0') {
if (!isalnum(*p) || *p=='_') {
*p = '-';
}
p++;
}
}
static void
handle_head(void)
{
long_offsets = ntohs(head_table->indexToLocFormat);
if (long_offsets != 0 && long_offsets != 1) {
fprintf(stderr, "**** indexToLocFormat wrong ****\n");
exit(1);
}
}
/* limit the recursion level to avoid cycles */
#define MAX_COMPOSITE_LEVEL 20
static void
draw_composite_glyf(
GLYPH *g,
GLYPH *glyph_list,
int glyphno,
double *orgmatrix,
int level
)
{
int len;
short ncontours;
USHORT flagbyte, glyphindex;
double arg1, arg2;
BYTE *ptr;
char *bptr;
SHORT *sptr;
double matrix[6], newmatrix[6];
get_glyf_table(glyphno, &glyf_table, &len);
if(len<=0) /* nothing to do */
return;
ncontours = ntohs(glyf_table->numberOfContours);
if (ncontours >= 0) { /* simple case */
draw_simple_glyf(g, glyph_list, glyphno, orgmatrix);
return;
}
if(ISDBG(COMPOSITE) && level ==0)
fprintf(stderr, "* %s [ %.2f %.2f %.2f %.2f %.2f %.2f ]\n", g->name,
orgmatrix[0], orgmatrix[1], orgmatrix[2], orgmatrix[3],
orgmatrix[4], orgmatrix[5]);
/* complex case */
if(level >= MAX_COMPOSITE_LEVEL) {
WARNING_1 fprintf(stderr,
"*** Glyph %s: stopped (possibly infinite) recursion at depth %d\n",
g->name, level);
return;
}
ptr = ((BYTE *) glyf_table + sizeof(TTF_GLYF));
sptr = (SHORT *) ptr;
do {
flagbyte = ntohs(*sptr);
sptr++;
glyphindex = ntohs(*sptr);
sptr++;
if (flagbyte & ARG_1_AND_2_ARE_WORDS) {
arg1 = (short)ntohs(*sptr);
sptr++;
arg2 = (short)ntohs(*sptr);
sptr++;
} else {
bptr = (char *) sptr;
arg1 = (signed char) bptr[0];
arg2 = (signed char) bptr[1];
sptr++;
}
matrix[1] = matrix[2] = 0.0;
if (flagbyte & WE_HAVE_A_SCALE) {
matrix[0] = matrix[3] = f2dot14(*sptr);
sptr++;
} else if (flagbyte & WE_HAVE_AN_X_AND_Y_SCALE) {
matrix[0] = f2dot14(*sptr);
sptr++;
matrix[3] = f2dot14(*sptr);
sptr++;
} else if (flagbyte & WE_HAVE_A_TWO_BY_TWO) {
matrix[0] = f2dot14(*sptr);
sptr++;
matrix[2] = f2dot14(*sptr);
sptr++;
matrix[1] = f2dot14(*sptr);
sptr++;
matrix[3] = f2dot14(*sptr);
sptr++;
} else {
matrix[0] = matrix[3] = 1.0;
}
/*
* See *
* http://fonts.apple.com/TTRefMan/RM06/Chap6g
* lyf.html * matrix[0,1,2,3,4,5]=a,b,c,d,m,n
*/
if (fabs(matrix[0]) > fabs(matrix[1]))
matrix[4] = fabs(matrix[0]);
else
matrix[4] = fabs(matrix[1]);
if (fabs(fabs(matrix[0]) - fabs(matrix[2])) <= 33. / 65536.)
matrix[4] *= 2.0;
if (fabs(matrix[2]) > fabs(matrix[3]))
matrix[5] = fabs(matrix[2]);
else
matrix[5] = fabs(matrix[3]);
if (fabs(fabs(matrix[2]) - fabs(matrix[3])) <= 33. / 65536.)
matrix[5] *= 2.0;
/*
* fprintf (stderr,"Matrix Opp %hd
* %hd\n",arg1,arg2);
*/
#if 0
fprintf(stderr, "Matrix: %f %f %f %f %f %f\n",
matrix[0], matrix[1], matrix[2], matrix[3],
matrix[4], matrix[5]);
fprintf(stderr, "Offset: %f %f (%s)\n",
arg1, arg2,
((flagbyte & ARGS_ARE_XY_VALUES) ? "XY" : "index"));
#endif
if (flagbyte & ARGS_ARE_XY_VALUES) {
matrix[4] *= arg1;
matrix[5] *= arg2;
} else {
WARNING_1 fprintf(stderr,
"*** Glyph %s: reusing scale from another glyph is unsupported\n",
g->name);
/*
* must extract values from a glyph
* but it seems to be too much pain
* and it's not clear now that it
* would be really used in any
* interesting font
*/
}
/* at this point arg1,arg2 contain what logically should be matrix[4,5] */
/* combine matrices */
newmatrix[0] = orgmatrix[0]*matrix[0] + orgmatrix[2]*matrix[1];
newmatrix[1] = orgmatrix[0]*matrix[2] + orgmatrix[2]*matrix[3];
newmatrix[2] = orgmatrix[1]*matrix[0] + orgmatrix[3]*matrix[1];
newmatrix[3] = orgmatrix[1]*matrix[2] + orgmatrix[3]*matrix[3];
newmatrix[4] = orgmatrix[0]*matrix[4] + orgmatrix[2]*matrix[5] + orgmatrix[4];
newmatrix[5] = orgmatrix[1]*matrix[4] + orgmatrix[3]*matrix[5] + orgmatrix[5];
if(ISDBG(COMPOSITE)) {
fprintf(stderr, "%*c+-> %2d %s [ %.2f %.2f %.2f %.2f %.2f %.2f ]\n",
level+1, ' ', level, glyph_list[glyphindex].name,
matrix[0], matrix[1], matrix[2], matrix[3],
matrix[4], matrix[5]);
fprintf(stderr, "%*c = [ %.2f %.2f %.2f %.2f %.2f %.2f ]\n",
level+1, ' ',
newmatrix[0], newmatrix[1], newmatrix[2], newmatrix[3],
newmatrix[4], newmatrix[5]);
}
draw_composite_glyf(g, glyph_list, glyphindex, newmatrix, level+1);
} while (flagbyte & MORE_COMPONENTS);
}
static void
draw_simple_glyf(
GLYPH *g,
GLYPH *glyph_list,
int glyphno,
double *matrix
)
{
int i, j, k, k1, len, first, cs, ce;
/* We assume that hsbw always sets to(0, 0) */
double xlast = 0, ylast = 0;
int finished, nguide, contour_start, contour_end;
short ncontours, n_inst, last_point;
USHORT *contour_end_pt;
BYTE *ptr;
#define GLYFSZ 2000
short xabs[GLYFSZ], yabs[GLYFSZ], xrel[GLYFSZ], yrel[GLYFSZ];
double xcoord[GLYFSZ], ycoord[GLYFSZ];
BYTE flags[GLYFSZ];
double tx, ty;
int needreverse = 0; /* transformation may require
* that */
GENTRY *lge;
lge = g->lastentry;
get_glyf_table(glyphno, &glyf_table, &len);
if (len <= 0) {
WARNING_1 fprintf(stderr,
"**** Composite glyph %s refers to non-existent glyph %s, ignored\n",
g->name,
glyph_list[glyphno].name);
return;
}
ncontours = ntohs(glyf_table->numberOfContours);
if (ncontours < 0) {
WARNING_1 fprintf(stderr,
"**** Composite glyph %s refers to composite glyph %s, ignored\n",
g->name,
glyph_list[glyphno].name);
return;
}
contour_end_pt = (USHORT *) ((char *) glyf_table + sizeof(TTF_GLYF));
last_point = ntohs(contour_end_pt[ncontours - 1]);
n_inst = ntohs(contour_end_pt[ncontours]);
ptr = ((BYTE *) contour_end_pt) + (ncontours << 1) + n_inst + 2;
j = k = 0;
while (k <= last_point) {
flags[k] = ptr[j];
if (ptr[j] & REPEAT) {
for (k1 = 0; k1 < ptr[j + 1]; k1++) {
k++;
flags[k] = ptr[j];
}
j++;
}
j++;
k++;
}
for (k = 0; k <= last_point; k++) {
if (flags[k] & XSHORT) {
if (flags[k] & XSAME) {
xrel[k] = ptr[j];
} else {
xrel[k] = -ptr[j];
}
j++;
} else if (flags[k] & XSAME) {
xrel[k] = 0.0;
} else {
xrel[k] = (short)( ptr[j] * 256 + ptr[j + 1] );
j += 2;
}
if (k == 0) {
xabs[k] = xrel[k];
} else {
xabs[k] = xrel[k] + xabs[k - 1];
}
}
for (k = 0; k <= last_point; k++) {
if (flags[k] & YSHORT) {
if (flags[k] & YSAME) {
yrel[k] = ptr[j];
} else {
yrel[k] = -ptr[j];
}
j++;
} else if (flags[k] & YSAME) {
yrel[k] = 0;
} else {
yrel[k] = ptr[j] * 256 + ptr[j + 1];
j += 2;
}
if (k == 0) {
yabs[k] = yrel[k];
} else {
yabs[k] = yrel[k] + yabs[k - 1];
}
}
if (matrix) {
for (i = 0; i <= last_point; i++) {
tx = xabs[i];
ty = yabs[i];
xcoord[i] = fscale(matrix[0] * tx + matrix[2] * ty + matrix[4]);
ycoord[i] = fscale(matrix[1] * tx + matrix[3] * ty + matrix[5]);
}
} else {
for (i = 0; i <= last_point; i++) {
xcoord[i] = fscale(xabs[i]);
ycoord[i] = fscale(yabs[i]);
}
}
i = j = 0;
first = 1;
while (i <= ntohs(contour_end_pt[ncontours - 1])) {
contour_end = ntohs(contour_end_pt[j]);
if (first) {
fg_rmoveto(g, xcoord[i], ycoord[i]);
xlast = xcoord[i];
ylast = ycoord[i];
contour_start = i;
first = 0;
} else if (flags[i] & ONOROFF) {
fg_rlineto(g, xcoord[i], ycoord[i]);
xlast = xcoord[i];
ylast = ycoord[i];
} else {
cs = i - 1;
finished = nguide = 0;
while (!finished) {
if (i == contour_end + 1) {
ce = contour_start;
finished = 1;
} else if (flags[i] & ONOROFF) {
ce = i;
finished = 1;
} else {
i++;
nguide++;
}
}
switch (nguide) {
case 0:
fg_rlineto(g, xcoord[ce], ycoord[ce]);
xlast = xcoord[ce];
ylast = ycoord[ce];
break;
case 1:
fg_rrcurveto(g,
(xcoord[cs] + 2.0 * xcoord[cs + 1]) / 3.0,
(ycoord[cs] + 2.0 * ycoord[cs + 1]) / 3.0,
(2.0 * xcoord[cs + 1] + xcoord[ce]) / 3.0,
(2.0 * ycoord[cs + 1] + ycoord[ce]) / 3.0,
xcoord[ce],
ycoord[ce]
);
xlast = xcoord[ce];
ylast = ycoord[ce];
break;
case 2:
fg_rrcurveto(g,
(-xcoord[cs] + 4.0 * xcoord[cs + 1]) / 3.0,
(-ycoord[cs] + 4.0 * ycoord[cs + 1]) / 3.0,
(4.0 * xcoord[cs + 2] - xcoord[ce]) / 3.0,
(4.0 * ycoord[cs + 2] - ycoord[ce]) / 3.0,
xcoord[ce],
ycoord[ce]
);
xlast = xcoord[ce];
ylast = ycoord[ce];
break;
case 3:
fg_rrcurveto(g,
(xcoord[cs] + 2.0 * xcoord[cs + 1]) / 3.0,
(ycoord[cs] + 2.0 * ycoord[cs + 1]) / 3.0,
(5.0 * xcoord[cs + 1] + xcoord[cs + 2]) / 6.0,
(5.0 * ycoord[cs + 1] + ycoord[cs + 2]) / 6.0,
(xcoord[cs + 1] + xcoord[cs + 2]) / 2.0,
(ycoord[cs + 1] + ycoord[cs + 2]) / 2.0
);
fg_rrcurveto(g,
(xcoord[cs + 1] + 5.0 * xcoord[cs + 2]) / 6.0,
(ycoord[cs + 1] + 5.0 * ycoord[cs + 2]) / 6.0,
(5.0 * xcoord[cs + 2] + xcoord[cs + 3]) / 6.0,
(5.0 * ycoord[cs + 2] + ycoord[cs + 3]) / 6.0,
(xcoord[cs + 3] + xcoord[cs + 2]) / 2.0,
(ycoord[cs + 3] + ycoord[cs + 2]) / 2.0
);
fg_rrcurveto(g,
(xcoord[cs + 2] + 5.0 * xcoord[cs + 3]) / 6.0,
(ycoord[cs + 2] + 5.0 * ycoord[cs + 3]) / 6.0,
(2.0 * xcoord[cs + 3] + xcoord[ce]) / 3.0,
(2.0 * ycoord[cs + 3] + ycoord[ce]) / 3.0,
xcoord[ce],
ycoord[ce]
);
ylast = ycoord[ce];
xlast = xcoord[ce];
break;
default:
k1 = cs + nguide;
fg_rrcurveto(g,
(xcoord[cs] + 2.0 * xcoord[cs + 1]) / 3.0,
(ycoord[cs] + 2.0 * ycoord[cs + 1]) / 3.0,
(5.0 * xcoord[cs + 1] + xcoord[cs + 2]) / 6.0,
(5.0 * ycoord[cs + 1] + ycoord[cs + 2]) / 6.0,
(xcoord[cs + 1] + xcoord[cs + 2]) / 2.0,
(ycoord[cs + 1] + ycoord[cs + 2]) / 2.0
);
for (k = cs + 2; k <= k1 - 1; k++) {
fg_rrcurveto(g,
(xcoord[k - 1] + 5.0 * xcoord[k]) / 6.0,
(ycoord[k - 1] + 5.0 * ycoord[k]) / 6.0,
(5.0 * xcoord[k] + xcoord[k + 1]) / 6.0,
(5.0 * ycoord[k] + ycoord[k + 1]) / 6.0,
(xcoord[k] + xcoord[k + 1]) / 2.0,
(ycoord[k] + ycoord[k + 1]) / 2.0
);
}
fg_rrcurveto(g,
(xcoord[k1 - 1] + 5.0 * xcoord[k1]) / 6.0,
(ycoord[k1 - 1] + 5.0 * ycoord[k1]) / 6.0,
(2.0 * xcoord[k1] + xcoord[ce]) / 3.0,
(2.0 * ycoord[k1] + ycoord[ce]) / 3.0,
xcoord[ce],
ycoord[ce]
);
xlast = xcoord[ce];
ylast = ycoord[ce];
break;
}
}
if (i >= contour_end) {
g_closepath(g);
first = 1;
i = contour_end + 1;
j++;
} else {
i++;
}
}
if (matrix) {
/* guess whether do we need to reverse the results */
double x[3], y[3];
int max = 0, from, to;
/* transform a triangle going in proper direction */
/*
* the origin of triangle is in (0,0) so we know it in
* advance
*/
x[0] = y[0] = 0;
x[1] = matrix[0] * 0 + matrix[2] * 300;
y[1] = matrix[1] * 0 + matrix[3] * 300;
x[2] = matrix[0] * 300 + matrix[2] * 0;
y[2] = matrix[1] * 300 + matrix[3] * 0;
/* then find the topmost point */
for (i = 0; i < 3; i++)
if (y[i] > y[max])
max = i;
from = (max + 3 - 1) % 3;
to = (max + 1) % 3;
needreverse = 0;
/* special cases for horizontal lines */
if (y[max] == y[from]) {
if (x[max] < y[from])
needreverse = 1;
} else if (y[to] == y[from]) {
if (x[to] < x[max])
needreverse = 1;
} else { /* generic case */
if ((x[to] - x[max]) * (y[max] - y[from])
> (x[max] - x[from]) * (y[to] - y[max]))
needreverse = 1;
}
if (needreverse) {
if (lge) {
assertpath(lge->next, __FILE__, __LINE__, g->name);
reversepathsfromto(lge->next, NULL);
} else {
assertpath(g->entries, __FILE__, __LINE__, g->name);
reversepaths(g);
}
}
}
}
static double
f2dot14(
short x
)
{
short y = ntohs(x);
return (y >> 14) + ((y & 0x3fff) / 16384.0);
}
/* check that the pointer points within the file */
/* returns 0 if pointer is good, 1 if bad */
static int
badpointer(
void *ptr
)
{
return (ptr < (void *)filebuffer || ptr >= (void *)filebuffer_end);
}
/*
* Externally accessible methods
*/
/*
* Open font and prepare to return information to the main driver.
* May print error and warning messages.
* Exit on error.
*/
static void
openfont(
char *fname,
char *arg /* unused now */
)
{
int i, j;
struct stat statbuf;
static struct {
void **tbpp; /* pointer to pointer to the table */
char name[5]; /* table name */
char optional; /* flag: table may be missing */
} tables[] = {
{ (void **)&name_table, "name", 0 },
{ (void **)&head_table, "head", 0 },
{ (void **)&hhea_table, "hhea", 0 },
{ (void **)&post_table, "post", 0 },
{ (void **)&glyf_start, "glyf", 0 },
{ (void **)&cmap_table, "cmap", 0 },
{ (void **)&kern_table, "kern", 1 },
{ (void **)&maxp_table, "maxp", 0 },
{ (void **)&hmtx_table, "hmtx", 0 },
{ (void **)&long_loca_table, "loca", 0 },
{ NULL, "", 0 } /* end of table */
};
if (stat(fname, &statbuf) == -1) {
fprintf(stderr, "**** Cannot access %s ****\n", fname);
exit(1);
}
if ((filebuffer = malloc(statbuf.st_size)) == NULL) {
fprintf(stderr, "**** Cannot malloc space for file ****\n");
exit(1);
}
filebuffer_end = filebuffer + statbuf.st_size;
if ((ttf_file = fopen(fname, "rb")) == NULL) {
fprintf(stderr, "**** Cannot open file '%s'\n", fname);
exit(1);
} else {
WARNING_2 fprintf(stderr, "Processing file %s\n", fname);
}
if (fread(filebuffer, 1, statbuf.st_size, ttf_file) != statbuf.st_size) {
fprintf(stderr, "**** Could not read whole file \n");
exit(1);
}
fclose(ttf_file);
directory = (TTF_DIRECTORY *) filebuffer;
if (ntohl(directory->sfntVersion) != 0x00010000) {
fprintf(stderr,
"**** Unknown File Version number [%x], or not a TrueType file\n",
directory->sfntVersion);
exit(1);
}
/* clear the tables */
for(j=0; tables[j].tbpp != NULL; j++)
*(tables[j].tbpp) = NULL;
dir_entry = &(directory->list);
for (i = 0; i < ntohs(directory->numTables); i++) {
for(j=0; tables[j].tbpp != NULL; j++)
if (memcmp(dir_entry->tag, tables[j].name, 4) == 0) {
*(tables[j].tbpp) = (void *) (filebuffer + ntohl(dir_entry->offset));
break;
}
if (memcmp(dir_entry->tag, "EBDT", 4) == 0 ||
memcmp(dir_entry->tag, "EBLC", 4) == 0 ||
memcmp(dir_entry->tag, "EBSC", 4) == 0) {
WARNING_1 fprintf(stderr, "Font contains bitmaps\n");
}
dir_entry++;
}
for(j=0; tables[j].tbpp != NULL; j++)
if(!tables[j].optional && badpointer( *(tables[j].tbpp) )) {
fprintf(stderr, "**** File contains no required table '%s'\n", tables[j].name);
exit(1);
}
handle_name();
handle_head();
ttf_nglyphs = ntohs(maxp_table->numGlyphs);
enc_found_ms = enc_found_mac = 0;
}
/*
* Close font.
* Exit on error.
*/
static void
closefont(
void
)
{
return; /* empty operation */
}
/*
* Get the number of glyphs in font.
*/
static int
getnglyphs (
void
)
{
return ttf_nglyphs;
}
/*
* Get the names of the glyphs.
* Returns 0 if the names were assigned, non-zero if the font
* provides no glyph names.
*/
static int
glnames(
GLYPH *glyph_list
)
{
int i, len, n, npost;
unsigned int format;
USHORT *name_index;
char *ptr, *p;
char **ps_name_ptr = (char **) malloc(ttf_nglyphs * sizeof(char *));
int n_ps_names;
int ps_fmt_3 = 0;
format = ntohl(post_table->formatType);
if (format == 0x00010000) {
for (i = 0; i < 258 && i < ttf_nglyphs; i++) {
glyph_list[i].name = mac_glyph_names[i];
}
} else if (format == 0x00020000) {
npost = ntohs(post_table->numGlyphs);
if (ttf_nglyphs != npost) {
/* This is an error in the font, but we can now cope */
WARNING_1 fprintf(stderr, "**** Postscript table size mismatch %d/%d ****\n",
npost, ttf_nglyphs);
}
n_ps_names = 0;
name_index = &(post_table->glyphNameIndex);
/* This checks the integrity of the post table */
for (i=0; i<npost; i++) {
n = ntohs(name_index[i]);
if (n > n_ps_names + 257) {
n_ps_names = n - 257;
}
}
ptr = (char *) post_table + 34 + (ttf_nglyphs << 1);
i = 0;
while (*ptr > 0 && i < n_ps_names) {
len = *ptr;
/* previously the program wrote nulls into the table. If the table
was corrupt, this could put zeroes anywhere, leading to obscure bugs,
so now I malloc space for the names. Yes it is much less efficient */
if ((p = malloc(len+1)) == NULL) {
fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__);
exit(255);
}
ps_name_ptr[i] = p;
strncpy(p, ptr+1, len);
p[len] = '\0';
i ++;
ptr += len + 1;
}
if (i != n_ps_names)
{
WARNING_2 fprintf (stderr, "** Postscript Name mismatch %d != %d **\n",
i, n_ps_names);
n_ps_names = i;
}
/*
* for (i=0; i<n_ps_names; i++) { fprintf(stderr, "i=%d,
* len=%d, name=%s\n", i, ps_name_len[i], ps_name_ptr[i]); }
*/
for (i = 0; i < npost; i++) {
n = ntohs(name_index[i]);
if (n < 258) {
glyph_list[i].name = mac_glyph_names[n];
} else if (n < 258 + n_ps_names) {
glyph_list[i].name = ps_name_ptr[n - 258];
} else {
glyph_list[i].name = malloc(16);
sprintf(glyph_list[i].name, "_g_%d", i);
WARNING_2 fprintf(stderr,
"Glyph No. %d has no postscript name, becomes %s\n",
i, glyph_list[i].name);
}
}
/* Now fake postscript names for all those beyond the end of the table */
if (npost < ttf_nglyphs) {
for (i=npost; i<ttf_nglyphs; i++) {
if ((glyph_list[i].name = malloc(16)) == NULL)
{
fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__);
exit(255);
}
sprintf(glyph_list[i].name, "_g_%d", i);
WARNING_2 fprintf(stderr,
"Glyph No. %d has no postscript name, becomes %s\n",
i, glyph_list[i].name);
}
}
} else if (format == 0x00030000) {
WARNING_3 fputs("No postscript table, using default\n", stderr);
ps_fmt_3 = 1;
} else if (format == 0x00028000) {
ptr = (char *) &(post_table->numGlyphs);
for (i = 0; i < ttf_nglyphs; i++) {
glyph_list[i].name = mac_glyph_names[i + ptr[i]];
}
} else {
fprintf(stderr,
"**** Postscript table in wrong format %x ****\n",
format);
exit(1);
}
return ps_fmt_3;
}
/*
* Get the metrics of the glyphs.
*/
static void
glmetrics(
GLYPH *glyph_list
)
{
int i;
int n_hmetrics = ntohs(hhea_table->numberOfHMetrics);
GLYPH *g;
LONGHORMETRIC *hmtx_entry = hmtx_table;
FWORD *lsblist;
for (i = 0; i < n_hmetrics; i++) {
g = &(glyph_list[i]);
g->width = ntohs(hmtx_entry->advanceWidth);
g->lsb = ntohs(hmtx_entry->lsb);
hmtx_entry++;
}
lsblist = (FWORD *) hmtx_entry;
hmtx_entry--;
for (i = n_hmetrics; i < ttf_nglyphs; i++) {
g = &(glyph_list[i]);
g->width = ntohs(hmtx_entry->advanceWidth);
g->lsb = ntohs(lsblist[i - n_hmetrics]);
}
for (i = 0; i < ttf_nglyphs; i++) {
g = &(glyph_list[i]);
get_glyf_table(i, &glyf_table, &g->ttf_pathlen);
g->xMin = (short)ntohs(glyf_table->xMin);
g->xMax = (short)ntohs(glyf_table->xMax);
g->yMin = (short)ntohs(glyf_table->yMin);
g->yMax = (short)ntohs(glyf_table->yMax);
}
}
static void
handle_ms_encoding(
GLYPH *glyph_list,
int *encoding,
int *unimap
)
{
int i, j, k, kk, set_ok;
USHORT start, end, ro;
short delta, n;
for (j = 0; j < cmap_n_segs - 1; j++) {
start = ntohs(cmap_seg_start[j]);
end = ntohs(cmap_seg_end[j]);
delta = ntohs(cmap_idDelta[j]);
ro = ntohs(cmap_idRangeOffset[j]);
for (k = start; k <= end; k++) {
if (ro == 0) {
n = k + delta;
} else {
n = ntohs(*((ro >> 1) + (k - start) +
&(cmap_idRangeOffset[j])));
if (delta != 0)
{
/* Not exactly sure how to deal with this circumstance,
I suspect it never occurs */
n += delta;
fprintf (stderr,
"rangeoffset and delta both non-zero - %d/%d",
ro, delta);
}
}
if(n<0 || n>=ttf_nglyphs) {
WARNING_1 fprintf(stderr, "Font contains a broken glyph code mapping, ignored\n");
continue;
}
// Find the first available orig_code slot
for (i = 0; i < GLYPH_MAX_ENCODINGS; i++ ) {
if ( glyph_list[n].orig_code[i] == -1 )
break;
}
if ( i == GLYPH_MAX_ENCODINGS ) {
//#if 0
if (strcmp(glyph_list[n].name, ".notdef") != 0) {
WARNING_2 fprintf(stderr,
"Glyph %s has >= %d encodings (A), %4.4x & %4.4x\n",
glyph_list[n].name,
GLYPH_MAX_ENCODINGS,
glyph_list[n].orig_code[0],
k);
}
//#endif
set_ok = 0;
break;
} else {
set_ok = 1;
}
if (enc_type==1 || forcemap) {
kk = unicode_rev_lookup(k);
if(ISDBG(UNICODE))
fprintf(stderr, "Unicode %s - 0x%04x\n",glyph_list[n].name,k);
if (set_ok) {
glyph_list[n].orig_code[i] = k;
/* glyph_list[n].char_no = kk; */
}
if (kk >= 0 && kk < ENCTABSZ && encoding[kk] == -1)
encoding[kk] = n;
} else {
if ((k & 0xff00) == 0xf000) {
if( encoding[k & 0x00ff] == -1 ) {
encoding[k & 0x00ff] = n;
if (set_ok) {
/* glyph_list[n].char_no = k & 0x00ff; */
glyph_list[n].orig_code[i] = k;
}
}
} else {
if (set_ok) {
/* glyph_list[n].char_no = k; */
glyph_list[n].orig_code[i] = k;
}
WARNING_2 fprintf(stderr,
"Glyph %s has non-symbol encoding %4.4x\n",
glyph_list[n].name,
k & 0xffff);
/*
* just use the code
* as it is
*/
if ((k & ~0xff) == 0 && encoding[k] == -1 )
encoding[k] = n;
}
}
}
}
}
static void
handle_mac_encoding(
GLYPH *glyph_list,
int *encoding,
int *unimap
)
{
short n;
int j, size;
size = ntohs(encoding0->length) - 6;
for (j = 0; j < size; j++) {
n = encoding0->glyphIdArray[j];
if (glyph_list[n].char_no != -1) {
WARNING_2 fprintf(stderr,
"Glyph %s has >= two encodings (B), %4.4x & %4.4x\n",
glyph_list[n].name,
glyph_list[n].char_no,
j);
} else {
if (j < ENCTABSZ) {
if(encoding[j] == -1) {
glyph_list[n].char_no = j;
encoding[j] = n;
}
}
}
}
}
/*
* Get the original encoding of the font.
* Returns 1 for if the original encoding is Unicode, 2 if the
* original encoding is other 16-bit, 0 if 8-bit.
*/
static int
glenc(
GLYPH *glyph_list,
int *encoding,
int *unimap
)
{
int num_tables = ntohs(cmap_table->numberOfEncodingTables);
BYTE *ptr;
int i, format, offset, seg_c2, found;
int platform, encoding_id;
TTF_CMAP_ENTRY *table_entry;
TTF_CMAP_FMT4 *encoding4;
if(enc_found_ms) {
handle_ms_encoding(glyph_list, encoding, unimap);
return enc_type;
} else if(enc_found_mac) {
handle_mac_encoding(glyph_list, encoding, unimap);
return 0;
}
enc_type = 0;
found = 0;
for (i = 0; i < num_tables && !found; i++) {
table_entry = &(cmap_table->encodingTable[i]);
offset = ntohl(table_entry->offset);
encoding4 = (TTF_CMAP_FMT4 *) ((BYTE *) cmap_table + offset);
format = ntohs(encoding4->format);
platform = ntohs(table_entry->platformID);
encoding_id = ntohs(table_entry->encodingID);
if (format != 4)
continue;
if(force_pid != -1) {
if(force_pid != platform || encoding_id != force_eid)
continue;
WARNING_1 fprintf(stderr, "Found Encoding PID=%d/EID=%d\n",
force_pid, force_eid);
enc_type = 1;
} else {
if (platform == 3 ) {
switch (encoding_id) {
case 0:
WARNING_1 fputs("Found Symbol Encoding\n", stderr);
break;
case 1:
WARNING_1 fputs("Found Unicode Encoding\n", stderr);
enc_type = 1;
break;
default:
WARNING_1 {
fprintf(stderr,
"****MS Encoding ID %d not supported****\n",
encoding_id);
fputs("Treating it like Symbol encoding\n", stderr);
}
break;
}
} else
continue;
}
found = 1;
seg_c2 = ntohs(encoding4->segCountX2);
cmap_n_segs = seg_c2 >> 1;
ptr = (BYTE *) encoding4 + 14;
cmap_seg_end = (USHORT *) ptr;
cmap_seg_start = (USHORT *) (ptr + seg_c2 + 2);
cmap_idDelta = (short *) (ptr + (seg_c2 * 2) + 2);
cmap_idRangeOffset = (short *) (ptr + (seg_c2 * 3) + 2);
enc_found_ms = 1;
handle_ms_encoding(glyph_list, encoding, unimap);
}
if (!found && force_pid == -1) {
WARNING_1 fputs("No Microsoft encoding, looking for MAC encoding\n", stderr);
for (i = 0; i < num_tables && !found; i++) {
table_entry = &(cmap_table->encodingTable[i]);
offset = ntohl(table_entry->offset);
encoding0 = (TTF_CMAP_FMT0 *) ((BYTE *) cmap_table + offset);
format = ntohs(encoding0->format);
platform = ntohs(table_entry->platformID);
encoding_id = ntohs(table_entry->encodingID);
if (format == 0) {
found = 1;
enc_found_mac = 1;
handle_mac_encoding(glyph_list, encoding, unimap);
}
}
}
if (!found && force_pid == -1) {
WARNING_1 fputs("No MAC encoding either, looking for any format 4 encoding\n", stderr);
for (i = 0; i < num_tables && !found; i++) {
table_entry = &(cmap_table->encodingTable[i]);
offset = ntohl(table_entry->offset);
encoding4 = (TTF_CMAP_FMT4 *) ((BYTE *) cmap_table + offset);
format = ntohs(encoding4->format);
platform = ntohs(table_entry->platformID);
encoding_id = ntohs(table_entry->encodingID);
if (format != 4)
continue;
WARNING_1 fprintf(stderr, "Found a last ditch encoding PID=%d/EID=%d, treating it as Unicode.\n",
platform, encoding_id);
found = 1;
enc_type = 1;
seg_c2 = ntohs(encoding4->segCountX2);
cmap_n_segs = seg_c2 >> 1;
ptr = (BYTE *) encoding4 + 14;
cmap_seg_end = (USHORT *) ptr;
cmap_seg_start = (USHORT *) (ptr + seg_c2 + 2);
cmap_idDelta = (short *) (ptr + (seg_c2 * 2) + 2);
cmap_idRangeOffset = (short *) (ptr + (seg_c2 * 3) + 2);
enc_found_ms = 1;
handle_ms_encoding(glyph_list, encoding, unimap);
}
}
if (!found) {
if(force_pid != -1) {
fprintf(stderr, "*** TTF encoding table PID=%d/EID=%d not found\n",
force_pid, force_eid);
}
fprintf(stderr, "**** No Recognised Encoding Table ****\n");
if(warnlevel >= 2) {
fprintf(stderr, "Font contains the following unsupported encoding tables:\n");
for (i = 0; i < num_tables && !found; i++) {
table_entry = &(cmap_table->encodingTable[i]);
offset = ntohl(table_entry->offset);
encoding0 = (TTF_CMAP_FMT0 *) ((BYTE *) cmap_table + offset);
format = ntohs(encoding0->format);
platform = ntohs(table_entry->platformID);
encoding_id = ntohs(table_entry->encodingID);
fprintf(stderr, " format=%d platform=%d encoding_id=%d\n",
format, platform, encoding_id);
}
}
exit(1);
}
return enc_type;
}
/*
* Get the font metrics
*/
static void
fnmetrics(
struct font_metrics *fm
)
{
char *str;
static int fieldstocheck[]= {2,4,6};
int i, j, len;
fm->italic_angle = (short) (ntohs(post_table->italicAngle.upper)) +
((short) ntohs(post_table->italicAngle.lower) / 65536.0);
fm->underline_position = (short) ntohs(post_table->underlinePosition);
fm->underline_thickness = (short) ntohs(post_table->underlineThickness);
fm->is_fixed_pitch = ntohl(post_table->isFixedPitch);
fm->ascender = (short)ntohs(hhea_table->ascender);
fm->descender = (short)ntohs(hhea_table->descender);
fm->units_per_em = ntohs(head_table->unitsPerEm);
fm->bbox[0] = (short) ntohs(head_table->xMin);
fm->bbox[1] = (short) ntohs(head_table->yMin);
fm->bbox[2] = (short) ntohs(head_table->xMax);
fm->bbox[3] = (short) ntohs(head_table->yMax);
fm->name_copyright = name_fields[0];
fm->name_family = name_fields[1];
fm->name_style = name_fields[2];
fm->name_full = name_fields[4];
fm->name_version = name_fields[5];
fm->name_ps = name_fields[6];
/* guess the boldness from the font names */
fm->force_bold=0;
for(i=0; !fm->force_bold && i<sizeof fieldstocheck /sizeof(int); i++) {
str = name_fields[fieldstocheck[i]];
len = strlen(str);
for(j=0; j<len; j++) {
if( (str[j]=='B'
|| str[j]=='b'
&& ( j==0 || !isalpha(str[j-1]) )
)
&& !strncmp("old",&str[j+1],3)
&& (j+4 >= len || !islower(str[j+4]))
) {
fm->force_bold=1;
break;
}
}
}
}
/*
* Get the path of contrours for a glyph.
*/
static void
glpath(
int glyphno,
GLYPH *glyf_list
)
{
double matrix[6];
GLYPH *g;
g = &glyph_list[glyphno];
matrix[0] = matrix[3] = 1.0;
matrix[1] = matrix[2] = matrix[4] = matrix[5] = 0.0;
draw_composite_glyf(g, glyf_list, glyphno, matrix, 0 /*level*/);
}
/*
* Get the kerning data.
*/
static void
kerning(
GLYPH *glyph_list
)
{
TTF_KERN_SUB *subtable;
TTF_KERN_ENTRY *kern_entry;
int i, j;
int ntables;
int npairs;
char *ptr;
if(kern_table == NULL) {
WARNING_1 fputs("No Kerning data\n", stderr);
return;
}
if(badpointer(kern_table)) {
fputs("**** Defective Kerning table, ignored\n", stderr);
return;
}
ntables = ntohs(kern_table->nTables);
ptr = (char *) kern_table + 4;
for (i = 0; i < ntables; i++) {
subtable = (TTF_KERN_SUB *) ptr;
if ((ntohs(subtable->coverage) & 0xff00) == 0) {
npairs = (short) ntohs(subtable->nPairs);
kern_entry = (TTF_KERN_ENTRY *) (ptr + sizeof(TTF_KERN_SUB));
kern_entry = (TTF_KERN_ENTRY *) (ptr + sizeof(TTF_KERN_SUB));
for (j = 0; j < npairs; j++) {
if( kern_entry->value != 0)
addkernpair(ntohs(kern_entry->left),
ntohs(kern_entry->right), (short)ntohs(kern_entry->value));
kern_entry++;
}
}
ptr += subtable->length;
}
}
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