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skia / third_party / poppler / refs/tags/poppler-0.7.2 / . / fofi / FoFiTrueType.cc
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//========================================================================
//
// FoFiTrueType.cc
//
// Copyright 1999-2003 Glyph & Cog, LLC
//
//========================================================================
#include <config.h>
#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif
#include <stdlib.h>
#include <string.h>
#include "goo/gtypes.h"
#include "goo/gmem.h"
#include "goo/GooString.h"
#include "goo/GooHash.h"
#include "FoFiType1C.h"
#include "FoFiTrueType.h"
//
// Terminology
// -----------
//
// character code = number used as an element of a text string
//
// character name = glyph name = name for a particular glyph within a
// font
//
// glyph index = GID = position (within some internal table in the font)
// where the instructions to draw a particular glyph are
// stored
//
// Type 1 fonts
// ------------
//
// Type 1 fonts contain:
//
// Encoding: array of glyph names, maps char codes to glyph names
//
// Encoding[charCode] = charName
//
// CharStrings: dictionary of instructions, keyed by character names,
// maps character name to glyph data
//
// CharStrings[charName] = glyphData
//
// TrueType fonts
// --------------
//
// TrueType fonts contain:
//
// 'cmap' table: mapping from character code to glyph index; there may
// be multiple cmaps in a TrueType font
//
// cmap[charCode] = gid
//
// 'post' table: mapping from glyph index to glyph name
//
// post[gid] = glyphName
//
// Type 42 fonts
// -------------
//
// Type 42 fonts contain:
//
// Encoding: array of glyph names, maps char codes to glyph names
//
// Encoding[charCode] = charName
//
// CharStrings: dictionary of glyph indexes, keyed by character names,
// maps character name to glyph index
//
// CharStrings[charName] = gid
//
//------------------------------------------------------------------------
#define ttcfTag 0x74746366
//------------------------------------------------------------------------
struct TrueTypeTable {
Guint tag;
Guint checksum;
int offset;
int origOffset;
int len;
};
struct TrueTypeCmap {
int platform;
int encoding;
int offset;
int len;
int fmt;
};
struct TrueTypeLoca {
int idx;
int origOffset;
int newOffset;
int len;
};
#define cmapTag 0x636d6170
#define glyfTag 0x676c7966
#define headTag 0x68656164
#define hheaTag 0x68686561
#define hmtxTag 0x686d7478
#define locaTag 0x6c6f6361
#define nameTag 0x6e616d65
#define os2Tag 0x4f532f32
#define postTag 0x706f7374
#define vrt2Tag 0x76727432
#define vertTag 0x76657274
static int cmpTrueTypeLocaOffset(const void *p1, const void *p2) {
TrueTypeLoca *loca1 = (TrueTypeLoca *)p1;
TrueTypeLoca *loca2 = (TrueTypeLoca *)p2;
if (loca1->origOffset == loca2->origOffset) {
return loca1->idx - loca2->idx;
}
return loca1->origOffset - loca2->origOffset;
}
static int cmpTrueTypeLocaIdx(const void *p1, const void *p2) {
TrueTypeLoca *loca1 = (TrueTypeLoca *)p1;
TrueTypeLoca *loca2 = (TrueTypeLoca *)p2;
return loca1->idx - loca2->idx;
}
static int cmpTrueTypeTableTag(const void *p1, const void *p2) {
TrueTypeTable *tab1 = (TrueTypeTable *)p1;
TrueTypeTable *tab2 = (TrueTypeTable *)p2;
return (int)tab1->tag - (int)tab2->tag;
}
//------------------------------------------------------------------------
struct T42Table {
char *tag; // 4-byte tag
GBool required; // required by the TrueType spec?
};
// TrueType tables to be embedded in Type 42 fonts.
// NB: the table names must be in alphabetical order here.
#define nT42Tables 11
static T42Table t42Tables[nT42Tables] = {
{ "cvt ", gTrue },
{ "fpgm", gTrue },
{ "glyf", gTrue },
{ "head", gTrue },
{ "hhea", gTrue },
{ "hmtx", gTrue },
{ "loca", gTrue },
{ "maxp", gTrue },
{ "prep", gTrue },
{ "vhea", gFalse },
{ "vmtx", gFalse }
};
#define t42HeadTable 3
#define t42LocaTable 6
#define t42GlyfTable 2
#define t42VheaTable 9
#define t42VmtxTable 10
//------------------------------------------------------------------------
// Glyph names in some arbitrary standard order that Apple uses for
// their TrueType fonts.
static char *macGlyphNames[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", "mu1",
"partialdiff", "summation", "product", "pi",
"integral", "ordfeminine", "ordmasculine", "Ohm",
"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", "overscore", "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"
};
//------------------------------------------------------------------------
// FoFiTrueType
//------------------------------------------------------------------------
FoFiTrueType *FoFiTrueType::make(char *fileA, int lenA, int faceIndexA) {
FoFiTrueType *ff;
ff = new FoFiTrueType(fileA, lenA, gFalse, faceIndexA);
if (!ff->parsedOk) {
delete ff;
return NULL;
}
return ff;
}
FoFiTrueType *FoFiTrueType::load(char *fileName, int faceIndexA) {
FoFiTrueType *ff;
char *fileA;
int lenA;
if (!(fileA = FoFiBase::readFile(fileName, &lenA))) {
return NULL;
}
ff = new FoFiTrueType(fileA, lenA, gTrue, faceIndexA);
if (!ff->parsedOk) {
delete ff;
return NULL;
}
return ff;
}
FoFiTrueType::FoFiTrueType(char *fileA, int lenA, GBool freeFileDataA, int faceIndexA):
FoFiBase(fileA, lenA, freeFileDataA)
{
tables = NULL;
nTables = 0;
cmaps = NULL;
nCmaps = 0;
nameToGID = NULL;
parsedOk = gFalse;
faceIndex = faceIndexA;
gsubFeatureTable = 0;
gsubLookupList = 0;
parse();
}
FoFiTrueType::~FoFiTrueType() {
gfree(tables);
gfree(cmaps);
if (nameToGID) {
delete nameToGID;
}
}
int FoFiTrueType::getNumCmaps() {
return nCmaps;
}
int FoFiTrueType::getCmapPlatform(int i) {
return cmaps[i].platform;
}
int FoFiTrueType::getCmapEncoding(int i) {
return cmaps[i].encoding;
}
int FoFiTrueType::findCmap(int platform, int encoding) {
int i;
for (i = 0; i < nCmaps; ++i) {
if (cmaps[i].platform == platform && cmaps[i].encoding == encoding) {
return i;
}
}
return -1;
}
Gushort FoFiTrueType::mapCodeToGID(int i, Guint c) {
Gushort gid;
Guint segCnt, segEnd, segStart, segDelta, segOffset;
Guint cmapFirst, cmapLen;
int pos, a, b, m;
GBool ok;
if (i < 0 || i >= nCmaps) {
return 0;
}
ok = gTrue;
pos = cmaps[i].offset;
switch (cmaps[i].fmt) {
case 0:
if (c >= cmaps[i].len - 6) {
return 0;
}
gid = getU8(cmaps[i].offset + 6 + c, &ok);
break;
case 4:
segCnt = getU16BE(pos + 6, &ok) / 2;
a = -1;
b = segCnt - 1;
segEnd = getU16BE(pos + 14 + 2*b, &ok);
if (c > segEnd) {
// malformed font -- the TrueType spec requires the last segEnd
// to be 0xffff
return 0;
}
// invariant: seg[a].end < code <= seg[b].end
while (b - a > 1 && ok) {
m = (a + b) / 2;
segEnd = getU16BE(pos + 14 + 2*m, &ok);
if (segEnd < c) {
a = m;
} else {
b = m;
}
}
segStart = getU16BE(pos + 16 + 2*segCnt + 2*b, &ok);
segDelta = getU16BE(pos + 16 + 4*segCnt + 2*b, &ok);
segOffset = getU16BE(pos + 16 + 6*segCnt + 2*b, &ok);
if (c < segStart) {
return 0;
}
if (segOffset == 0) {
gid = (c + segDelta) & 0xffff;
} else {
gid = getU16BE(pos + 16 + 6*segCnt + 2*b +
segOffset + 2 * (c - segStart), &ok);
if (gid != 0) {
gid = (gid + segDelta) & 0xffff;
}
}
break;
case 6:
cmapFirst = getU16BE(pos + 6, &ok);
cmapLen = getU16BE(pos + 8, &ok);
if (c < cmapFirst || c >= cmapFirst + cmapLen) {
return 0;
}
gid = getU16BE(pos + 10 + 2 * (c - cmapFirst), &ok);
break;
case 12:
segCnt = getU32BE(pos + 12, &ok);
a = -1;
b = segCnt - 1;
segEnd = getU32BE(pos + 16 + 12*b+4, &ok);
if (c > segEnd) {
return 0;
}
// invariant: seg[a].end < code <= seg[b].end
while (b - a > 1 && ok) {
m = (a + b) / 2;
segEnd = getU32BE(pos + 16 + 12*m+4, &ok);
if (segEnd < c) {
a = m;
} else {
b = m;
}
}
segStart = getU32BE(pos + 16 + 12*b, &ok);
segDelta = getU32BE(pos + 16 + 12*b+8, &ok);
if (c < segStart) {
return 0;
}
gid = segDelta + (c-segStart);
break;
default:
return 0;
}
if (!ok) {
return 0;
}
return gid;
}
int FoFiTrueType::mapNameToGID(char *name) {
if (!nameToGID) {
return 0;
}
return nameToGID->lookupInt(name);
}
Gushort *FoFiTrueType::getCIDToGIDMap(int *nCIDs) {
FoFiType1C *ff;
Gushort *map;
int i;
*nCIDs = 0;
if (!openTypeCFF) {
return NULL;
}
i = seekTable("CFF ");
if (!checkRegion(tables[i].offset, tables[i].len)) {
return NULL;
}
if (!(ff = FoFiType1C::make((char *)file + tables[i].offset,
tables[i].len))) {
return NULL;
}
map = ff->getCIDToGIDMap(nCIDs);
delete ff;
return map;
}
int FoFiTrueType::getEmbeddingRights() {
int i, fsType;
GBool ok;
if ((i = seekTable("OS/2")) < 0) {
return 4;
}
ok = gTrue;
fsType = getU16BE(tables[i].offset + 8, &ok);
if (!ok) {
return 4;
}
if (fsType & 0x0008) {
return 2;
}
if (fsType & 0x0004) {
return 1;
}
if (fsType & 0x0002) {
return 0;
}
return 3;
}
void FoFiTrueType::convertToType42(char *psName, char **encoding,
Gushort *codeToGID,
FoFiOutputFunc outputFunc,
void *outputStream) {
GooString *buf;
GBool ok;
if (openTypeCFF) {
return;
}
// write the header
ok = gTrue;
buf = GooString::format("%!PS-TrueTypeFont-{0:2g}\n",
(double)getS32BE(0, &ok) / 65536.0);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
// begin the font dictionary
(*outputFunc)(outputStream, "10 dict begin\n", 14);
(*outputFunc)(outputStream, "/FontName /", 11);
(*outputFunc)(outputStream, psName, strlen(psName));
(*outputFunc)(outputStream, " def\n", 5);
(*outputFunc)(outputStream, "/FontType 42 def\n", 17);
(*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30);
buf = GooString::format("/FontBBox [{0:d} {1:d} {2:d} {3:d}] def\n",
bbox[0], bbox[1], bbox[2], bbox[3]);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, "/PaintType 0 def\n", 17);
// write the guts of the dictionary
cvtEncoding(encoding, outputFunc, outputStream);
cvtCharStrings(encoding, codeToGID, outputFunc, outputStream);
cvtSfnts(outputFunc, outputStream, NULL, gFalse);
// end the dictionary and define the font
(*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40);
}
void FoFiTrueType::convertToType1(char *psName, char **newEncoding,
GBool ascii, FoFiOutputFunc outputFunc,
void *outputStream) {
FoFiType1C *ff;
int i;
if (!openTypeCFF) {
return;
}
i = seekTable("CFF ");
if (!checkRegion(tables[i].offset, tables[i].len)) {
return;
}
if (!(ff = FoFiType1C::make((char *)file + tables[i].offset,
tables[i].len))) {
return;
}
ff->convertToType1(psName, newEncoding, ascii, outputFunc, outputStream);
delete ff;
}
void FoFiTrueType::convertToCIDType2(char *psName,
Gushort *cidMap, int nCIDs,
GBool needVerticalMetrics,
FoFiOutputFunc outputFunc,
void *outputStream) {
GooString *buf;
Gushort cid;
GBool ok;
int i, j, k;
if (openTypeCFF) {
return;
}
// write the header
ok = gTrue;
buf = GooString::format("%!PS-TrueTypeFont-{0:2g}\n",
(double)getS32BE(0, &ok) / 65536.0);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
// begin the font dictionary
(*outputFunc)(outputStream, "20 dict begin\n", 14);
(*outputFunc)(outputStream, "/CIDFontName /", 14);
(*outputFunc)(outputStream, psName, strlen(psName));
(*outputFunc)(outputStream, " def\n", 5);
(*outputFunc)(outputStream, "/CIDFontType 2 def\n", 19);
(*outputFunc)(outputStream, "/FontType 42 def\n", 17);
(*outputFunc)(outputStream, "/CIDSystemInfo 3 dict dup begin\n", 32);
(*outputFunc)(outputStream, " /Registry (Adobe) def\n", 24);
(*outputFunc)(outputStream, " /Ordering (Identity) def\n", 27);
(*outputFunc)(outputStream, " /Supplement 0 def\n", 20);
(*outputFunc)(outputStream, " end def\n", 10);
(*outputFunc)(outputStream, "/GDBytes 2 def\n", 15);
if (cidMap) {
buf = GooString::format("/CIDCount {0:d} def\n", nCIDs);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
if (nCIDs > 32767) {
(*outputFunc)(outputStream, "/CIDMap [", 9);
for (i = 0; i < nCIDs; i += 32768 - 16) {
(*outputFunc)(outputStream, "<\n", 2);
for (j = 0; j < 32768 - 16 && i+j < nCIDs; j += 16) {
(*outputFunc)(outputStream, " ", 2);
for (k = 0; k < 16 && i+j+k < nCIDs; ++k) {
cid = cidMap[i+j+k];
buf = GooString::format("{0:02x}{1:02x}",
(cid >> 8) & 0xff, cid & 0xff);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "\n", 1);
}
(*outputFunc)(outputStream, " >", 3);
}
(*outputFunc)(outputStream, "\n", 1);
(*outputFunc)(outputStream, "] def\n", 6);
} else {
(*outputFunc)(outputStream, "/CIDMap <\n", 10);
for (i = 0; i < nCIDs; i += 16) {
(*outputFunc)(outputStream, " ", 2);
for (j = 0; j < 16 && i+j < nCIDs; ++j) {
cid = cidMap[i+j];
buf = GooString::format("{0:02x}{1:02x}",
(cid >> 8) & 0xff, cid & 0xff);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "\n", 1);
}
(*outputFunc)(outputStream, "> def\n", 6);
}
} else {
// direct mapping - just fill the string(s) with s[i]=i
buf = GooString::format("/CIDCount {0:d} def\n", nGlyphs);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
if (nGlyphs > 32767) {
(*outputFunc)(outputStream, "/CIDMap [\n", 10);
for (i = 0; i < nGlyphs; i += 32767) {
j = nGlyphs - i < 32767 ? nGlyphs - i : 32767;
buf = GooString::format(" {0:d} string 0 1 {1:d} {{\n", 2 * j, j - 1);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
buf = GooString::format(" 2 copy dup 2 mul exch {0:d} add -8 bitshift put\n",
i);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
buf = GooString::format(" 1 index exch dup 2 mul 1 add exch {0:d} add"
" 255 and put\n", i);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, " } for\n", 8);
}
(*outputFunc)(outputStream, "] def\n", 6);
} else {
buf = GooString::format("/CIDMap {0:d} string\n", 2 * nGlyphs);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
buf = GooString::format(" 0 1 {0:d} {{\n", nGlyphs - 1);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream,
" 2 copy dup 2 mul exch -8 bitshift put\n", 42);
(*outputFunc)(outputStream,
" 1 index exch dup 2 mul 1 add exch 255 and put\n", 50);
(*outputFunc)(outputStream, " } for\n", 8);
(*outputFunc)(outputStream, "def\n", 4);
}
}
(*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30);
buf = GooString::format("/FontBBox [{0:d} {1:d} {2:d} {3:d}] def\n",
bbox[0], bbox[1], bbox[2], bbox[3]);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, "/PaintType 0 def\n", 17);
(*outputFunc)(outputStream, "/Encoding [] readonly def\n", 26);
(*outputFunc)(outputStream, "/CharStrings 1 dict dup begin\n", 30);
(*outputFunc)(outputStream, " /.notdef 0 def\n", 17);
(*outputFunc)(outputStream, " end readonly def\n", 19);
// write the guts of the dictionary
cvtSfnts(outputFunc, outputStream, NULL, needVerticalMetrics);
// end the dictionary and define the font
(*outputFunc)(outputStream,
"CIDFontName currentdict end /CIDFont defineresource pop\n",
56);
}
void FoFiTrueType::convertToCIDType0(char *psName,
FoFiOutputFunc outputFunc,
void *outputStream) {
FoFiType1C *ff;
int i;
if (!openTypeCFF) {
return;
}
i = seekTable("CFF ");
if (!checkRegion(tables[i].offset, tables[i].len)) {
return;
}
if (!(ff = FoFiType1C::make((char *)file + tables[i].offset,
tables[i].len))) {
return;
}
ff->convertToCIDType0(psName, outputFunc, outputStream);
delete ff;
}
void FoFiTrueType::convertToType0(char *psName, Gushort *cidMap, int nCIDs,
GBool needVerticalMetrics,
FoFiOutputFunc outputFunc,
void *outputStream) {
GooString *buf;
GooString *sfntsName;
int n, i, j;
if (openTypeCFF) {
return;
}
// write the Type 42 sfnts array
sfntsName = (new GooString(psName))->append("_sfnts");
cvtSfnts(outputFunc, outputStream, sfntsName, needVerticalMetrics);
delete sfntsName;
// write the descendant Type 42 fonts
n = cidMap ? nCIDs : nGlyphs;
for (i = 0; i < n; i += 256) {
(*outputFunc)(outputStream, "10 dict begin\n", 14);
(*outputFunc)(outputStream, "/FontName /", 11);
(*outputFunc)(outputStream, psName, strlen(psName));
buf = GooString::format("_{0:02x} def\n", i >> 8);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, "/FontType 42 def\n", 17);
(*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30);
buf = GooString::format("/FontBBox [{0:d} {1:d} {2:d} {3:d}] def\n",
bbox[0], bbox[1], bbox[2], bbox[3]);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, "/PaintType 0 def\n", 17);
(*outputFunc)(outputStream, "/sfnts ", 7);
(*outputFunc)(outputStream, psName, strlen(psName));
(*outputFunc)(outputStream, "_sfnts def\n", 11);
(*outputFunc)(outputStream, "/Encoding 256 array\n", 20);
for (j = 0; j < 256 && i+j < n; ++j) {
buf = GooString::format("dup {0:d} /c{1:02x} put\n", j, j);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "readonly def\n", 13);
(*outputFunc)(outputStream, "/CharStrings 257 dict dup begin\n", 32);
(*outputFunc)(outputStream, "/.notdef 0 def\n", 15);
for (j = 0; j < 256 && i+j < n; ++j) {
buf = GooString::format("/c{0:02x} {1:d} def\n",
j, cidMap ? cidMap[i+j] : i+j);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "end readonly def\n", 17);
(*outputFunc)(outputStream,
"FontName currentdict end definefont pop\n", 40);
}
// write the Type 0 parent font
(*outputFunc)(outputStream, "16 dict begin\n", 14);
(*outputFunc)(outputStream, "/FontName /", 11);
(*outputFunc)(outputStream, psName, strlen(psName));
(*outputFunc)(outputStream, " def\n", 5);
(*outputFunc)(outputStream, "/FontType 0 def\n", 16);
(*outputFunc)(outputStream, "/FontMatrix [1 0 0 1 0 0] def\n", 30);
(*outputFunc)(outputStream, "/FMapType 2 def\n", 16);
(*outputFunc)(outputStream, "/Encoding [\n", 12);
for (i = 0; i < n; i += 256) {
buf = GooString::format("{0:d}\n", i >> 8);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "] def\n", 6);
(*outputFunc)(outputStream, "/FDepVector [\n", 14);
for (i = 0; i < n; i += 256) {
(*outputFunc)(outputStream, "/", 1);
(*outputFunc)(outputStream, psName, strlen(psName));
buf = GooString::format("_{0:02x} findfont\n", i >> 8);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
(*outputFunc)(outputStream, "] def\n", 6);
(*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40);
}
void FoFiTrueType::convertToType0(char *psName,
FoFiOutputFunc outputFunc,
void *outputStream) {
FoFiType1C *ff;
int i;
if (!openTypeCFF) {
return;
}
i = seekTable("CFF ");
if (!checkRegion(tables[i].offset, tables[i].len)) {
return;
}
if (!(ff = FoFiType1C::make((char *)file + tables[i].offset,
tables[i].len))) {
return;
}
ff->convertToType0(psName, outputFunc, outputStream);
delete ff;
}
void FoFiTrueType::writeTTF(FoFiOutputFunc outputFunc,
void *outputStream, char *name,
Gushort *codeToGID) {
// this substitute cmap table maps char codes 0000-ffff directly to
// glyphs 0000-ffff
static char cmapTab[36] = {
0, 0, // table version number
0, 1, // number of encoding tables
0, 1, // platform ID
0, 0, // encoding ID
0, 0, 0, 12, // offset of subtable
0, 4, // subtable format
0, 24, // subtable length
0, 0, // subtable version
0, 2, // segment count * 2
0, 2, // 2 * 2 ^ floor(log2(segCount))
0, 0, // floor(log2(segCount))
0, 0, // 2*segCount - 2*2^floor(log2(segCount))
(char)0xff, (char)0xff, // endCount[0]
0, 0, // reserved
0, 0, // startCount[0]
0, 0, // idDelta[0]
0, 0 // pad to a mulitple of four bytes
};
static char nameTab[8] = {
0, 0, // format
0, 0, // number of name records
0, 6, // offset to start of string storage
0, 0 // pad to multiple of four bytes
};
static char postTab[32] = {
0, 1, 0, 0, // format
0, 0, 0, 0, // italic angle
0, 0, // underline position
0, 0, // underline thickness
0, 0, 0, 0, // fixed pitch
0, 0, 0, 0, // min Type 42 memory
0, 0, 0, 0, // max Type 42 memory
0, 0, 0, 0, // min Type 1 memory
0, 0, 0, 0 // max Type 1 memory
};
static char os2Tab[86] = {
0, 1, // version
0, 1, // xAvgCharWidth
0, 0, // usWeightClass
0, 0, // usWidthClass
0, 0, // fsType
0, 0, // ySubscriptXSize
0, 0, // ySubscriptYSize
0, 0, // ySubscriptXOffset
0, 0, // ySubscriptYOffset
0, 0, // ySuperscriptXSize
0, 0, // ySuperscriptYSize
0, 0, // ySuperscriptXOffset
0, 0, // ySuperscriptYOffset
0, 0, // yStrikeoutSize
0, 0, // yStrikeoutPosition
0, 0, // sFamilyClass
0, 0, 0, 0, 0, // panose
0, 0, 0, 0, 0,
0, 0, 0, 0, // ulUnicodeRange1
0, 0, 0, 0, // ulUnicodeRange2
0, 0, 0, 0, // ulUnicodeRange3
0, 0, 0, 0, // ulUnicodeRange4
0, 0, 0, 0, // achVendID
0, 0, // fsSelection
0, 0, // usFirstCharIndex
0, 0, // usLastCharIndex
0, 0, // sTypoAscender
0, 0, // sTypoDescender
0, 0, // sTypoLineGap
0, 0, // usWinAscent
0, 0, // usWinDescent
0, 0, 0, 0, // ulCodePageRange1
0, 0, 0, 0 // ulCodePageRange2
};
GBool missingCmap, missingName, missingPost, missingOS2;
GBool unsortedLoca, badCmapLen, abbrevHMTX;
int nZeroLengthTables;
int nHMetrics, advWidth, lsb;
TrueTypeLoca *locaTable;
TrueTypeTable *newTables;
char *newNameTab, *newCmapTab, *newHHEATab, *newHMTXTab;
int nNewTables, cmapIdx, cmapLen, glyfLen, newNameLen, newCmapLen, next;
int newHHEALen, newHMTXLen;
Guint locaChecksum, glyfChecksum, fileChecksum;
char *tableDir;
char locaBuf[4], checksumBuf[4];
GBool ok;
Guint t;
int pos, i, j, k, n;
if (openTypeCFF) {
return;
}
// check for missing tables
// (Note: if the OS/2 table is missing, the Microsoft PCL5 driver
// will embed a PCL TrueType font with the pitch field set to zero,
// which apparently causes divide-by-zero errors. As far as I can
// tell, the only important field in the OS/2 table is
// xAvgCharWidth.)
missingCmap = (cmapIdx = seekTable("cmap")) < 0;
missingName = seekTable("name") < 0;
missingPost = seekTable("post") < 0;
missingOS2 = seekTable("OS/2") < 0;
// read the loca table, check to see if it's sorted
locaTable = (TrueTypeLoca *)gmallocn(nGlyphs + 1, sizeof(TrueTypeLoca));
unsortedLoca = gFalse;
i = seekTable("loca");
pos = tables[i].offset;
ok = gTrue;
for (i = 0; i <= nGlyphs; ++i) {
if (locaFmt) {
locaTable[i].origOffset = (int)getU32BE(pos + i*4, &ok);
} else {
locaTable[i].origOffset = 2 * getU16BE(pos + i*2, &ok);
}
if (i > 0 && locaTable[i].origOffset < locaTable[i-1].origOffset) {
unsortedLoca = gTrue;
}
// glyph descriptions must be at least 12 bytes long (nContours,
// xMin, yMin, xMax, yMax, instructionLength - two bytes each);
// invalid glyph descriptions (even if they're never used) make
// Windows choke, so we work around that problem here (ideally,
// this would parse the glyph descriptions in the glyf table and
// remove any that were invalid, but this quick test is a decent
// start)
if (i > 0 &&
locaTable[i].origOffset - locaTable[i-1].origOffset > 0 &&
locaTable[i].origOffset - locaTable[i-1].origOffset < 12) {
locaTable[i-1].origOffset = locaTable[i].origOffset;
unsortedLoca = gTrue;
}
locaTable[i].idx = i;
}
// check for zero-length tables
nZeroLengthTables = 0;
for (i = 0; i < nTables; ++i) {
if (tables[i].len == 0) {
++nZeroLengthTables;
}
}
// check for an incorrect cmap table length
badCmapLen = gFalse;
cmapLen = 0; // make gcc happy
if (!missingCmap) {
if (nCmaps > 0) {
cmapLen = cmaps[0].offset + cmaps[0].len;
for (i = 1; i < nCmaps; ++i) {
if (cmaps[i].offset + cmaps[i].len > cmapLen) {
cmapLen = cmaps[i].offset + cmaps[i].len;
}
}
}
cmapLen -= tables[cmapIdx].offset;
if (cmapLen > tables[cmapIdx].len) {
badCmapLen = gTrue;
}
}
// check for an abbreviated hmtx table (this is completely legal,
// but confuses the Microsoft PCL5 printer driver, which generates
// embedded fonts with the pitch field set to zero)
i = seekTable("hhea");
nHMetrics = getU16BE(tables[i].offset + 34, &ok);
abbrevHMTX = nHMetrics < nGlyphs;
// if nothing is broken, just write the TTF file as is
if (!missingCmap && !missingName && !missingPost && !missingOS2 &&
!unsortedLoca && !badCmapLen && !abbrevHMTX && nZeroLengthTables == 0 &&
!name && !codeToGID) {
(*outputFunc)(outputStream, (char *)file, len);
goto done1;
}
// sort the 'loca' table: some (non-compliant) fonts have
// out-of-order loca tables; in order to correctly handle the case
// where (compliant) fonts have empty entries in the middle of the
// table, cmpTrueTypeLocaOffset uses offset as its primary sort key,
// and idx as its secondary key (ensuring that adjacent entries with
// the same pos value remain in the same order)
glyfLen = 0; // make gcc happy
if (unsortedLoca) {
qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca),
&cmpTrueTypeLocaOffset);
for (i = 0; i < nGlyphs; ++i) {
locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset;
}
locaTable[nGlyphs].len = 0;
qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca),
&cmpTrueTypeLocaIdx);
pos = 0;
for (i = 0; i <= nGlyphs; ++i) {
locaTable[i].newOffset = pos;
pos += locaTable[i].len;
if (pos & 3) {
pos += 4 - (pos & 3);
}
}
glyfLen = pos;
}
// compute checksums for the loca and glyf tables
locaChecksum = glyfChecksum = 0;
if (unsortedLoca) {
if (locaFmt) {
for (j = 0; j <= nGlyphs; ++j) {
locaChecksum += locaTable[j].newOffset;
}
} else {
for (j = 0; j <= nGlyphs; j += 2) {
locaChecksum += locaTable[j].newOffset << 16;
if (j + 1 <= nGlyphs) {
locaChecksum += locaTable[j+1].newOffset;
}
}
}
pos = tables[seekTable("glyf")].offset;
for (j = 0; j < nGlyphs; ++j) {
n = locaTable[j].len;
if (n > 0) {
k = locaTable[j].origOffset;
if (checkRegion(pos + k, n)) {
glyfChecksum += computeTableChecksum(file + pos + k, n);
}
}
}
}
// construct the new name table
if (name) {
n = strlen(name);
newNameLen = (6 + 4*12 + 2 * (3*n + 7) + 3) & ~3;
newNameTab = (char *)gmalloc(newNameLen);
memset(newNameTab, 0, newNameLen);
newNameTab[0] = 0; // format selector
newNameTab[1] = 0;
newNameTab[2] = 0; // number of name records
newNameTab[3] = 4;
newNameTab[4] = 0; // offset to start of string storage
newNameTab[5] = 6 + 4*12;
next = 0;
for (i = 0; i < 4; ++i) {
newNameTab[6 + i*12 + 0] = 0; // platform ID = Microsoft
newNameTab[6 + i*12 + 1] = 3;
newNameTab[6 + i*12 + 2] = 0; // encoding ID = Unicode
newNameTab[6 + i*12 + 3] = 1;
newNameTab[6 + i*12 + 4] = 0x04; // language ID = American English
newNameTab[6 + i*12 + 5] = 0x09;
newNameTab[6 + i*12 + 6] = 0; // name ID
newNameTab[6 + i*12 + 7] = i + 1;
newNameTab[6 + i*12 + 8] = i+1 == 2 ? 0 : ((2*n) >> 8); // string length
newNameTab[6 + i*12 + 9] = i+1 == 2 ? 14 : ((2*n) & 0xff);
newNameTab[6 + i*12 + 10] = next >> 8; // string offset
newNameTab[6 + i*12 + 11] = next & 0xff;
if (i+1 == 2) {
memcpy(newNameTab + 6 + 4*12 + next, "\0R\0e\0g\0u\0l\0a\0r", 14);
next += 14;
} else {
for (j = 0; j < n; ++j) {
newNameTab[6 + 4*12 + next + 2*j] = 0;
newNameTab[6 + 4*12 + next + 2*j + 1] = name[j];
}
next += 2*n;
}
}
} else {
newNameLen = 0;
newNameTab = NULL;
}
// construct the new cmap table
if (codeToGID) {
newCmapLen = 44 + 256 * 2;
newCmapTab = (char *)gmalloc(newCmapLen);
newCmapTab[0] = 0; // table version number = 0
newCmapTab[1] = 0;
newCmapTab[2] = 0; // number of encoding tables = 1
newCmapTab[3] = 1;
newCmapTab[4] = 0; // platform ID = Microsoft
newCmapTab[5] = 3;
newCmapTab[6] = 0; // encoding ID = Unicode
newCmapTab[7] = 1;
newCmapTab[8] = 0; // offset of subtable
newCmapTab[9] = 0;
newCmapTab[10] = 0;
newCmapTab[11] = 12;
newCmapTab[12] = 0; // subtable format = 4
newCmapTab[13] = 4;
newCmapTab[14] = 0x02; // subtable length
newCmapTab[15] = 0x20;
newCmapTab[16] = 0; // subtable version = 0
newCmapTab[17] = 0;
newCmapTab[18] = 0; // segment count * 2
newCmapTab[19] = 4;
newCmapTab[20] = 0; // 2 * 2 ^ floor(log2(segCount))
newCmapTab[21] = 4;
newCmapTab[22] = 0; // floor(log2(segCount))
newCmapTab[23] = 1;
newCmapTab[24] = 0; // 2*segCount - 2*2^floor(log2(segCount))
newCmapTab[25] = 0;
newCmapTab[26] = 0x00; // endCount[0]
newCmapTab[27] = (char)0xff;
newCmapTab[28] = (char)0xff; // endCount[1]
newCmapTab[29] = (char)0xff;
newCmapTab[30] = 0; // reserved
newCmapTab[31] = 0;
newCmapTab[32] = 0x00; // startCount[0]
newCmapTab[33] = 0x00;
newCmapTab[34] = (char)0xff; // startCount[1]
newCmapTab[35] = (char)0xff;
newCmapTab[36] = 0; // idDelta[0]
newCmapTab[37] = 0;
newCmapTab[38] = 0; // idDelta[1]
newCmapTab[39] = 1;
newCmapTab[40] = 0; // idRangeOffset[0]
newCmapTab[41] = 4;
newCmapTab[42] = 0; // idRangeOffset[1]
newCmapTab[43] = 0;
for (i = 0; i < 256; ++i) {
newCmapTab[44 + 2*i] = codeToGID[i] >> 8;
newCmapTab[44 + 2*i + 1] = codeToGID[i] & 0xff;
}
} else {
newCmapLen = 0;
newCmapTab = NULL;
}
// generate the new hmtx table and the updated hhea table
if (abbrevHMTX) {
i = seekTable("hhea");
pos = tables[i].offset;
newHHEALen = 36;
newHHEATab = (char *)gmalloc(newHHEALen);
for (i = 0; i < newHHEALen; ++i) {
newHHEATab[i] = getU8(pos++, &ok);
}
newHHEATab[34] = nGlyphs >> 8;
newHHEATab[35] = nGlyphs & 0xff;
i = seekTable("hmtx");
pos = tables[i].offset;
newHMTXLen = 4 * nGlyphs;
newHMTXTab = (char *)gmalloc(newHMTXLen);
advWidth = 0;
for (i = 0; i < nHMetrics; ++i) {
advWidth = getU16BE(pos, &ok);
lsb = getU16BE(pos + 2, &ok);
pos += 4;
newHMTXTab[4*i ] = advWidth >> 8;
newHMTXTab[4*i + 1] = advWidth & 0xff;
newHMTXTab[4*i + 2] = lsb >> 8;
newHMTXTab[4*i + 3] = lsb & 0xff;
}
for (; i < nGlyphs; ++i) {
lsb = getU16BE(pos, &ok);
pos += 2;
newHMTXTab[4*i ] = advWidth >> 8;
newHMTXTab[4*i + 1] = advWidth & 0xff;
newHMTXTab[4*i + 2] = lsb >> 8;
newHMTXTab[4*i + 3] = lsb & 0xff;
}
} else {
newHHEATab = newHMTXTab = NULL;
newHHEALen = newHMTXLen = 0; // make gcc happy
}
// construct the new table directory:
// - keep all original tables with non-zero length
// - fix the cmap table's length, if necessary
// - add missing tables
// - sort the table by tag
// - compute new table positions, including 4-byte alignment
// - (re)compute table checksums
nNewTables = nTables - nZeroLengthTables +
(missingCmap ? 1 : 0) + (missingName ? 1 : 0) +
(missingPost ? 1 : 0) + (missingOS2 ? 1 : 0);
newTables = (TrueTypeTable *)gmallocn(nNewTables, sizeof(TrueTypeTable));
j = 0;
for (i = 0; i < nTables; ++i) {
if (tables[i].len > 0) {
newTables[j] = tables[i];
newTables[j].origOffset = tables[i].offset;
if (checkRegion(tables[i].offset, newTables[i].len)) {
newTables[j].checksum =
computeTableChecksum(file + tables[i].offset, tables[i].len);
if (tables[i].tag == headTag) {
// don't include the file checksum
newTables[j].checksum -= getU32BE(tables[i].offset + 8, &ok);
}
}
if (newTables[j].tag == cmapTag && codeToGID) {
newTables[j].len = newCmapLen;
newTables[j].checksum = computeTableChecksum((Guchar *)newCmapTab,
newCmapLen);
} else if (newTables[j].tag == cmapTag && badCmapLen) {
newTables[j].len = cmapLen;
} else if (newTables[j].tag == locaTag && unsortedLoca) {
newTables[j].len = (nGlyphs + 1) * (locaFmt ? 4 : 2);
newTables[j].checksum = locaChecksum;
} else if (newTables[j].tag == glyfTag && unsortedLoca) {
newTables[j].len = glyfLen;
newTables[j].checksum = glyfChecksum;
} else if (newTables[j].tag == nameTag && name) {
newTables[j].len = newNameLen;
newTables[j].checksum = computeTableChecksum((Guchar *)newNameTab,
newNameLen);
} else if (newTables[j].tag == hheaTag && abbrevHMTX) {
newTables[j].len = newHHEALen;
newTables[j].checksum = computeTableChecksum((Guchar *)newHHEATab,
newHHEALen);
} else if (newTables[j].tag == hmtxTag && abbrevHMTX) {
newTables[j].len = newHMTXLen;
newTables[j].checksum = computeTableChecksum((Guchar *)newHMTXTab,
newHMTXLen);
}
++j;
}
}
if (missingCmap) {
newTables[j].tag = cmapTag;
if (codeToGID) {
newTables[j].checksum = computeTableChecksum((Guchar *)newCmapTab,
newCmapLen);
newTables[j].len = newCmapLen;
} else {
newTables[j].checksum = computeTableChecksum((Guchar *)cmapTab,
sizeof(cmapTab));
newTables[j].len = sizeof(cmapTab);
}
++j;
}
if (missingName) {
newTables[j].tag = nameTag;
if (name) {
newTables[j].checksum = computeTableChecksum((Guchar *)newNameTab,
newNameLen);
newTables[j].len = newNameLen;
} else {
newTables[j].checksum = computeTableChecksum((Guchar *)nameTab,
sizeof(nameTab));
newTables[j].len = sizeof(nameTab);
}
++j;
}
if (missingPost) {
newTables[j].tag = postTag;
newTables[j].checksum = computeTableChecksum((Guchar *)postTab,
sizeof(postTab));
newTables[j].len = sizeof(postTab);
++j;
}
if (missingOS2) {
newTables[j].tag = os2Tag;
newTables[j].checksum = computeTableChecksum((Guchar *)os2Tab,
sizeof(os2Tab));
newTables[j].len = sizeof(os2Tab);
++j;
}
qsort(newTables, nNewTables, sizeof(TrueTypeTable),
&cmpTrueTypeTableTag);
pos = 12 + nNewTables * 16;
for (i = 0; i < nNewTables; ++i) {
newTables[i].offset = pos;
pos += newTables[i].len;
if (pos & 3) {
pos += 4 - (pos & 3);
}
}
// write the table directory
tableDir = (char *)gmalloc(12 + nNewTables * 16);
tableDir[0] = 0x00; // sfnt version
tableDir[1] = 0x01;
tableDir[2] = 0x00;
tableDir[3] = 0x00;
tableDir[4] = (char)((nNewTables >> 8) & 0xff); // numTables
tableDir[5] = (char)(nNewTables & 0xff);
for (i = -1, t = (Guint)nNewTables; t; ++i, t >>= 1) ;
t = 1 << (4 + i);
tableDir[6] = (char)((t >> 8) & 0xff); // searchRange
tableDir[7] = (char)(t & 0xff);
tableDir[8] = (char)((i >> 8) & 0xff); // entrySelector
tableDir[9] = (char)(i & 0xff);
t = nNewTables * 16 - t;
tableDir[10] = (char)((t >> 8) & 0xff); // rangeShift
tableDir[11] = (char)(t & 0xff);
pos = 12;
for (i = 0; i < nNewTables; ++i) {
tableDir[pos ] = (char)(newTables[i].tag >> 24);
tableDir[pos+ 1] = (char)(newTables[i].tag >> 16);
tableDir[pos+ 2] = (char)(newTables[i].tag >> 8);
tableDir[pos+ 3] = (char) newTables[i].tag;
tableDir[pos+ 4] = (char)(newTables[i].checksum >> 24);
tableDir[pos+ 5] = (char)(newTables[i].checksum >> 16);
tableDir[pos+ 6] = (char)(newTables[i].checksum >> 8);
tableDir[pos+ 7] = (char) newTables[i].checksum;
tableDir[pos+ 8] = (char)(newTables[i].offset >> 24);
tableDir[pos+ 9] = (char)(newTables[i].offset >> 16);
tableDir[pos+10] = (char)(newTables[i].offset >> 8);
tableDir[pos+11] = (char) newTables[i].offset;
tableDir[pos+12] = (char)(newTables[i].len >> 24);
tableDir[pos+13] = (char)(newTables[i].len >> 16);
tableDir[pos+14] = (char)(newTables[i].len >> 8);
tableDir[pos+15] = (char) newTables[i].len;
pos += 16;
}
(*outputFunc)(outputStream, tableDir, 12 + nNewTables * 16);
// compute the file checksum
fileChecksum = computeTableChecksum((Guchar *)tableDir,
12 + nNewTables * 16);
for (i = 0; i < nNewTables; ++i) {
fileChecksum += newTables[i].checksum;
}
fileChecksum = 0xb1b0afba - fileChecksum;
// write the tables
for (i = 0; i < nNewTables; ++i) {
if (newTables[i].tag == headTag) {
if (checkRegion(newTables[i].origOffset, newTables[i].len)) {
(*outputFunc)(outputStream, (char *)file + newTables[i].origOffset, 8);
checksumBuf[0] = fileChecksum >> 24;
checksumBuf[1] = fileChecksum >> 16;
checksumBuf[2] = fileChecksum >> 8;
checksumBuf[3] = fileChecksum;
(*outputFunc)(outputStream, checksumBuf, 4);
(*outputFunc)(outputStream,
(char *)file + newTables[i].origOffset + 12,
newTables[i].len - 12);
} else {
for (j = 0; j < newTables[i].len; ++j) {
(*outputFunc)(outputStream, "\0", 1);
}
}
} else if (newTables[i].tag == cmapTag && codeToGID) {
(*outputFunc)(outputStream, newCmapTab, newTables[i].len);
} else if (newTables[i].tag == cmapTag && missingCmap) {
(*outputFunc)(outputStream, cmapTab, newTables[i].len);
} else if (newTables[i].tag == nameTag && name) {
(*outputFunc)(outputStream, newNameTab, newTables[i].len);
} else if (newTables[i].tag == nameTag && missingName) {
(*outputFunc)(outputStream, nameTab, newTables[i].len);
} else if (newTables[i].tag == postTag && missingPost) {
(*outputFunc)(outputStream, postTab, newTables[i].len);
} else if (newTables[i].tag == os2Tag && missingOS2) {
(*outputFunc)(outputStream, os2Tab, newTables[i].len);
} else if (newTables[i].tag == hheaTag && abbrevHMTX) {
(*outputFunc)(outputStream, newHHEATab, newTables[i].len);
} else if (newTables[i].tag == hmtxTag && abbrevHMTX) {
(*outputFunc)(outputStream, newHMTXTab, newTables[i].len);
} else if (newTables[i].tag == locaTag && unsortedLoca) {
for (j = 0; j <= nGlyphs; ++j) {
if (locaFmt) {
locaBuf[0] = (char)(locaTable[j].newOffset >> 24);
locaBuf[1] = (char)(locaTable[j].newOffset >> 16);
locaBuf[2] = (char)(locaTable[j].newOffset >> 8);
locaBuf[3] = (char) locaTable[j].newOffset;
(*outputFunc)(outputStream, locaBuf, 4);
} else {
locaBuf[0] = (char)(locaTable[j].newOffset >> 9);
locaBuf[1] = (char)(locaTable[j].newOffset >> 1);
(*outputFunc)(outputStream, locaBuf, 2);
}
}
} else if (newTables[i].tag == glyfTag && unsortedLoca) {
pos = tables[seekTable("glyf")].offset;
for (j = 0; j < nGlyphs; ++j) {
n = locaTable[j].len;
if (n > 0) {
k = locaTable[j].origOffset;
if (checkRegion(pos + k, n)) {
(*outputFunc)(outputStream, (char *)file + pos + k, n);
} else {
for (k = 0; k < n; ++k) {
(*outputFunc)(outputStream, "\0", 1);
}
}
if ((k = locaTable[j].len & 3)) {
(*outputFunc)(outputStream, "\0\0\0\0", 4 - k);
}
}
}
} else {
if (checkRegion(newTables[i].origOffset, newTables[i].len)) {
(*outputFunc)(outputStream, (char *)file + newTables[i].origOffset,
newTables[i].len);
} else {
for (j = 0; j < newTables[i].len; ++j) {
(*outputFunc)(outputStream, "\0", 1);
}
}
}
if (newTables[i].len & 3) {
(*outputFunc)(outputStream, "\0\0\0", 4 - (newTables[i].len & 3));
}
}
gfree(newHMTXTab);
gfree(newHHEATab);
gfree(newCmapTab);
gfree(newNameTab);
gfree(tableDir);
gfree(newTables);
done1:
gfree(locaTable);
}
void FoFiTrueType::cvtEncoding(char **encoding,
FoFiOutputFunc outputFunc,
void *outputStream) {
char *name;
GooString *buf;
int i;
(*outputFunc)(outputStream, "/Encoding 256 array\n", 20);
if (encoding) {
for (i = 0; i < 256; ++i) {
if (!(name = encoding[i])) {
name = ".notdef";
}
buf = GooString::format("dup {0:d} /", i);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
(*outputFunc)(outputStream, name, strlen(name));
(*outputFunc)(outputStream, " put\n", 5);
}
} else {
for (i = 0; i < 256; ++i) {
buf = GooString::format("dup {0:d} /c{1:02x} put\n", i, i);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
}
(*outputFunc)(outputStream, "readonly def\n", 13);
}
void FoFiTrueType::cvtCharStrings(char **encoding,
Gushort *codeToGID,
FoFiOutputFunc outputFunc,
void *outputStream) {
char *name;
GooString *buf;
char buf2[16];
int i, k;
// always define '.notdef'
(*outputFunc)(outputStream, "/CharStrings 256 dict dup begin\n", 32);
(*outputFunc)(outputStream, "/.notdef 0 def\n", 15);
// if there's no 'cmap' table, punt
if (nCmaps == 0) {
goto err;
}
// map char name to glyph index:
// 1. use encoding to map name to char code
// 2. use codeToGID to map char code to glyph index
// N.B. We do this in reverse order because font subsets can have
// weird encodings that use the same character name twice, and
// the first definition is probably the one we want.
k = 0; // make gcc happy
for (i = 255; i >= 0; --i) {
if (encoding) {
name = encoding[i];
} else {
sprintf(buf2, "c%02x", i);
name = buf2;
}
if (name && strcmp(name, ".notdef")) {
k = codeToGID[i];
// note: Distiller (maybe Adobe's PS interpreter in general)
// doesn't like TrueType fonts that have CharStrings entries
// which point to nonexistent glyphs, hence the (k < nGlyphs)
// test
if (k > 0 && k < nGlyphs) {
(*outputFunc)(outputStream, "/", 1);
(*outputFunc)(outputStream, name, strlen(name));
buf = GooString::format(" {0:d} def\n", k);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
}
}
err:
(*outputFunc)(outputStream, "end readonly def\n", 17);
}
void FoFiTrueType::cvtSfnts(FoFiOutputFunc outputFunc,
void *outputStream, GooString *name,
GBool needVerticalMetrics) {
Guchar headData[54];
TrueTypeLoca *locaTable;
Guchar *locaData;
TrueTypeTable newTables[nT42Tables];
Guchar tableDir[12 + nT42Tables*16];
GBool ok;
Guint checksum;
int nNewTables;
int length, pos, glyfPos, i, j, k;
Guchar vheaTab[36] = {
0, 1, 0, 0, // table version number
0, 0, // ascent
0, 0, // descent
0, 0, // reserved
0, 0, // max advance height
0, 0, // min top side bearing
0, 0, // min bottom side bearing
0, 0, // y max extent
0, 0, // caret slope rise
0, 1, // caret slope run
0, 0, // caret offset
0, 0, // reserved
0, 0, // reserved
0, 0, // reserved
0, 0, // reserved
0, 0, // metric data format
0, 1 // number of advance heights in vmtx table
};
Guchar *vmtxTab;
GBool needVhea, needVmtx;
int advance;
// construct the 'head' table, zero out the font checksum
i = seekTable("head");
pos = tables[i].offset;
if (!checkRegion(pos, 54)) {
return;
}
memcpy(headData, file + pos, 54);
headData[8] = headData[9] = headData[10] = headData[11] = (Guchar)0;
// read the original 'loca' table, pad entries out to 4 bytes, and
// sort it into proper order -- some (non-compliant) fonts have
// out-of-order loca tables; in order to correctly handle the case
// where (compliant) fonts have empty entries in the middle of the
// table, cmpTrueTypeLocaPos uses offset as its primary sort key,
// and idx as its secondary key (ensuring that adjacent entries with
// the same pos value remain in the same order)
locaTable = (TrueTypeLoca *)gmallocn(nGlyphs + 1, sizeof(TrueTypeLoca));
i = seekTable("loca");
pos = tables[i].offset;
ok = gTrue;
for (i = 0; i <= nGlyphs; ++i) {
locaTable[i].idx = i;
if (locaFmt) {
locaTable[i].origOffset = (int)getU32BE(pos + i*4, &ok);
} else {
locaTable[i].origOffset = 2 * getU16BE(pos + i*2, &ok);
}
}
qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca),
&cmpTrueTypeLocaOffset);
for (i = 0; i < nGlyphs; ++i) {
locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset;
}
locaTable[nGlyphs].len = 0;
qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca),
&cmpTrueTypeLocaIdx);
pos = 0;
for (i = 0; i <= nGlyphs; ++i) {
locaTable[i].newOffset = pos;
pos += locaTable[i].len;
if (pos & 3) {
pos += 4 - (pos & 3);
}
}
// construct the new 'loca' table
locaData = (Guchar *)gmallocn(nGlyphs + 1, (locaFmt ? 4 : 2));
for (i = 0; i <= nGlyphs; ++i) {
pos = locaTable[i].newOffset;
if (locaFmt) {
locaData[4*i ] = (Guchar)(pos >> 24);
locaData[4*i+1] = (Guchar)(pos >> 16);
locaData[4*i+2] = (Guchar)(pos >> 8);
locaData[4*i+3] = (Guchar) pos;
} else {
locaData[2*i ] = (Guchar)(pos >> 9);
locaData[2*i+1] = (Guchar)(pos >> 1);
}
}
// count the number of tables
nNewTables = 0;
for (i = 0; i < nT42Tables; ++i) {
if (t42Tables[i].required ||
seekTable(t42Tables[i].tag) >= 0) {
++nNewTables;
}
}
vmtxTab = NULL; // make gcc happy
advance = 0; // make gcc happy
if (needVerticalMetrics) {
needVhea = seekTable("vhea") < 0;
needVmtx = seekTable("vmtx") < 0;
if (needVhea || needVmtx) {
i = seekTable("head");
advance = getU16BE(tables[i].offset + 18, &ok); // units per em
if (needVhea) {
++nNewTables;
}
if (needVmtx) {
++nNewTables;
}
}
}
// construct the new table headers, including table checksums
// (pad each table out to a multiple of 4 bytes)
pos = 12 + nNewTables*16;
k = 0;
for (i = 0; i < nT42Tables; ++i) {
length = -1;
checksum = 0; // make gcc happy
if (i == t42HeadTable) {
length = 54;
checksum = computeTableChecksum(headData, 54);
} else if (i == t42LocaTable) {
length = (nGlyphs + 1) * (locaFmt ? 4 : 2);
checksum = computeTableChecksum(locaData, length);
} else if (i == t42GlyfTable) {
length = 0;
checksum = 0;
glyfPos = tables[seekTable("glyf")].offset;
for (j = 0; j < nGlyphs; ++j) {
length += locaTable[j].len;
if (length & 3) {
length += 4 - (length & 3);
}
if (checkRegion(glyfPos + locaTable[j].origOffset, locaTable[j].len)) {
checksum +=
computeTableChecksum(file + glyfPos + locaTable[j].origOffset,
locaTable[j].len);
}
}
} else {
if ((j = seekTable(t42Tables[i].tag)) >= 0) {
length = tables[j].len;
if (checkRegion(tables[j].offset, length)) {
checksum = computeTableChecksum(file + tables[j].offset, length);
}
} else if (needVerticalMetrics && i == t42VheaTable) {
vheaTab[10] = advance / 256; // max advance height
vheaTab[11] = advance % 256;
length = sizeof(vheaTab);
checksum = computeTableChecksum(vheaTab, length);
} else if (needVerticalMetrics && i == t42VmtxTable) {
length = 4 + (nGlyphs - 1) * 4;
vmtxTab = (Guchar *)gmalloc(length);
vmtxTab[0] = advance / 256;
vmtxTab[1] = advance % 256;
for (j = 2; j < length; j += 2) {
vmtxTab[j] = 0;
vmtxTab[j+1] = 0;
}
checksum = computeTableChecksum(vmtxTab, length);
} else if (t42Tables[i].required) {
//~ error(-1, "Embedded TrueType font is missing a required table ('%s')",
//~ t42Tables[i].tag);
length = 0;
checksum = 0;
}
}
if (length >= 0) {
newTables[k].tag = ((t42Tables[i].tag[0] & 0xff) << 24) |
((t42Tables[i].tag[1] & 0xff) << 16) |
((t42Tables[i].tag[2] & 0xff) << 8) |
(t42Tables[i].tag[3] & 0xff);
newTables[k].checksum = checksum;
newTables[k].offset = pos;
newTables[k].len = length;
pos += length;
if (pos & 3) {
pos += 4 - (length & 3);
}
++k;
}
}
// construct the table directory
tableDir[0] = 0x00; // sfnt version
tableDir[1] = 0x01;
tableDir[2] = 0x00;
tableDir[3] = 0x00;
tableDir[4] = 0; // numTables
tableDir[5] = nNewTables;
tableDir[6] = 0; // searchRange
tableDir[7] = (Guchar)128;
tableDir[8] = 0; // entrySelector
tableDir[9] = 3;
tableDir[10] = 0; // rangeShift
tableDir[11] = (Guchar)(16 * nNewTables - 128);
pos = 12;
for (i = 0; i < nNewTables; ++i) {
tableDir[pos ] = (Guchar)(newTables[i].tag >> 24);
tableDir[pos+ 1] = (Guchar)(newTables[i].tag >> 16);
tableDir[pos+ 2] = (Guchar)(newTables[i].tag >> 8);
tableDir[pos+ 3] = (Guchar) newTables[i].tag;
tableDir[pos+ 4] = (Guchar)(newTables[i].checksum >> 24);
tableDir[pos+ 5] = (Guchar)(newTables[i].checksum >> 16);
tableDir[pos+ 6] = (Guchar)(newTables[i].checksum >> 8);
tableDir[pos+ 7] = (Guchar) newTables[i].checksum;
tableDir[pos+ 8] = (Guchar)(newTables[i].offset >> 24);
tableDir[pos+ 9] = (Guchar)(newTables[i].offset >> 16);
tableDir[pos+10] = (Guchar)(newTables[i].offset >> 8);
tableDir[pos+11] = (Guchar) newTables[i].offset;
tableDir[pos+12] = (Guchar)(newTables[i].len >> 24);
tableDir[pos+13] = (Guchar)(newTables[i].len >> 16);
tableDir[pos+14] = (Guchar)(newTables[i].len >> 8);
tableDir[pos+15] = (Guchar) newTables[i].len;
pos += 16;
}
// compute the font checksum and store it in the head table
checksum = computeTableChecksum(tableDir, 12 + nNewTables*16);
for (i = 0; i < nNewTables; ++i) {
checksum += newTables[i].checksum;
}
checksum = 0xb1b0afba - checksum; // because the TrueType spec says so
headData[ 8] = (Guchar)(checksum >> 24);
headData[ 9] = (Guchar)(checksum >> 16);
headData[10] = (Guchar)(checksum >> 8);
headData[11] = (Guchar) checksum;
// start the sfnts array
if (name) {
(*outputFunc)(outputStream, "/", 1);
(*outputFunc)(outputStream, name->getCString(), name->getLength());
(*outputFunc)(outputStream, " [\n", 3);
} else {
(*outputFunc)(outputStream, "/sfnts [\n", 9);
}
// write the table directory
dumpString(tableDir, 12 + nNewTables*16, outputFunc, outputStream);
// write the tables
for (i = 0; i < nNewTables; ++i) {
if (i == t42HeadTable) {
dumpString(headData, 54, outputFunc, outputStream);
} else if (i == t42LocaTable) {
length = (nGlyphs + 1) * (locaFmt ? 4 : 2);
dumpString(locaData, length, outputFunc, outputStream);
} else if (i == t42GlyfTable) {
glyfPos = tables[seekTable("glyf")].offset;
for (j = 0; j < nGlyphs; ++j) {
if (locaTable[j].len > 0 &&
checkRegion(glyfPos + locaTable[j].origOffset, locaTable[j].len)) {
dumpString(file + glyfPos + locaTable[j].origOffset,
locaTable[j].len, outputFunc, outputStream);
}
}
} else {
// length == 0 means the table is missing and the error was
// already reported during the construction of the table
// headers
if ((length = newTables[i].len) > 0) {
if ((j = seekTable(t42Tables[i].tag)) >= 0 &&
checkRegion(tables[j].offset, tables[j].len)) {
dumpString(file + tables[j].offset, tables[j].len,
outputFunc, outputStream);
} else if (needVerticalMetrics && i == t42VheaTable) {
dumpString(vheaTab, length, outputFunc, outputStream);
} else if (needVerticalMetrics && i == t42VmtxTable) {
dumpString(vmtxTab, length, outputFunc, outputStream);
gfree(vmtxTab);
}
}
}
}
// end the sfnts array
(*outputFunc)(outputStream, "] def\n", 6);
gfree(locaData);
gfree(locaTable);
}
void FoFiTrueType::dumpString(Guchar *s, int length,
FoFiOutputFunc outputFunc,
void *outputStream) {
GooString *buf;
int pad, i, j;
(*outputFunc)(outputStream, "<", 1);
for (i = 0; i < length; i += 32) {
for (j = 0; j < 32 && i+j < length; ++j) {
buf = GooString::format("{0:02x}", s[i+j] & 0xff);
(*outputFunc)(outputStream, buf->getCString(), buf->getLength());
delete buf;
}
if (i % (65536 - 32) == 65536 - 64) {
(*outputFunc)(outputStream, ">\n<", 3);
} else if (i+32 < length) {
(*outputFunc)(outputStream, "\n", 1);
}
}
if (length & 3) {
pad = 4 - (length & 3);
for (i = 0; i < pad; ++i) {
(*outputFunc)(outputStream, "00", 2);
}
}
// add an extra zero byte because the Adobe Type 42 spec says so
(*outputFunc)(outputStream, "00>\n", 4);
}
Guint FoFiTrueType::computeTableChecksum(Guchar *data, int length) {
Guint checksum, word;
int i;
checksum = 0;
for (i = 0; i+3 < length; i += 4) {
word = ((data[i ] & 0xff) << 24) +
((data[i+1] & 0xff) << 16) +
((data[i+2] & 0xff) << 8) +
(data[i+3] & 0xff);
checksum += word;
}
if (length & 3) {
word = 0;
i = length & ~3;
switch (length & 3) {
case 3:
word |= (data[i+2] & 0xff) << 8;
case 2:
word |= (data[i+1] & 0xff) << 16;
case 1:
word |= (data[i ] & 0xff) << 24;
break;
}
checksum += word;
}
return checksum;
}
void FoFiTrueType::parse() {
Guint topTag;
int pos, ver, i, j;
parsedOk = gTrue;
// look for a collection (TTC)
topTag = getU32BE(0, &parsedOk);
if (!parsedOk) {
return;
}
if (topTag == ttcfTag) {
/* TTC font */
int dircount;
dircount = getU32BE(8, &parsedOk);
if (!parsedOk)
return;
if (! dircount) {
parsedOk = gFalse;
return;
}
if (faceIndex >= dircount)
faceIndex = 0;
pos = getU32BE(12 + faceIndex * 4, &parsedOk);
if (! parsedOk)
return;
} else {
pos = 0;
}
// check the sfnt version
ver = getU32BE(pos, &parsedOk);
if (!parsedOk) {
return;
}
openTypeCFF = ver == 0x4f54544f; // 'OTTO'
// read the table directory
nTables = getU16BE(pos + 4, &parsedOk);
if (!parsedOk) {
return;
}
tables = (TrueTypeTable *)gmallocn(nTables, sizeof(TrueTypeTable));
pos += 12;
for (i = 0; i < nTables; ++i) {
tables[i].tag = getU32BE(pos, &parsedOk);
tables[i].checksum = getU32BE(pos + 4, &parsedOk);
tables[i].offset = (int)getU32BE(pos + 8, &parsedOk);
tables[i].len = (int)getU32BE(pos + 12, &parsedOk);
if (tables[i].offset + tables[i].len < tables[i].offset ||
tables[i].offset + tables[i].len > len) {
parsedOk = gFalse;
}
pos += 16;
}
if (!parsedOk) {
return;
}
// check for tables that are required by both the TrueType spec and
// the Type 42 spec
if (seekTable("head") < 0 ||
seekTable("hhea") < 0 ||
seekTable("maxp") < 0 ||
seekTable("hmtx") < 0 ||
(!openTypeCFF && seekTable("loca") < 0) ||
(!openTypeCFF && seekTable("glyf") < 0) ||
(openTypeCFF && seekTable("CFF ") < 0)) {
parsedOk = gFalse;
return;
}
// read the cmaps
if ((i = seekTable("cmap")) >= 0) {
pos = tables[i].offset + 2;
nCmaps = getU16BE(pos, &parsedOk);
pos += 2;
if (!parsedOk) {
return;
}
cmaps = (TrueTypeCmap *)gmallocn(nCmaps, sizeof(TrueTypeCmap));
for (j = 0; j < nCmaps; ++j) {
cmaps[j].platform = getU16BE(pos, &parsedOk);
cmaps[j].encoding = getU16BE(pos + 2, &parsedOk);
cmaps[j].offset = tables[i].offset + getU32BE(pos + 4, &parsedOk);
pos += 8;
cmaps[j].fmt = getU16BE(cmaps[j].offset, &parsedOk);
cmaps[j].len = getU16BE(cmaps[j].offset + 2, &parsedOk);
}
if (!parsedOk) {
return;
}
} else {
nCmaps = 0;
}
// get the number of glyphs from the maxp table
i = seekTable("maxp");
nGlyphs = getU16BE(tables[i].offset + 4, &parsedOk);
if (!parsedOk) {
return;
}
// get the bbox and loca table format from the head table
i = seekTable("head");
bbox[0] = getS16BE(tables[i].offset + 36, &parsedOk);
bbox[1] = getS16BE(tables[i].offset + 38, &parsedOk);
bbox[2] = getS16BE(tables[i].offset + 40, &parsedOk);
bbox[3] = getS16BE(tables[i].offset + 42, &parsedOk);
locaFmt = getS16BE(tables[i].offset + 50, &parsedOk);
if (!parsedOk) {
return;
}
// make sure the loca table is sane (correct length and entries are
// in bounds)
if (!openTypeCFF) {
i = seekTable("loca");
if (tables[i].len < 0) {
parsedOk = gFalse;
return;
}
if (tables[i].len < (nGlyphs + 1) * (locaFmt ? 4 : 2)) {
nGlyphs = tables[i].len / (locaFmt ? 4 : 2) - 1;
}
for (j = 0; j <= nGlyphs; ++j) {
if (locaFmt) {
pos = (int)getU32BE(tables[i].offset + j*4, &parsedOk);
} else {
pos = getU16BE(tables[i].offset + j*2, &parsedOk);
}
if (pos < 0 || pos > len) {
parsedOk = gFalse;
}
}
if (!parsedOk) {
return;
}
}
// read the post table
readPostTable();
}
void FoFiTrueType::readPostTable() {
GooString *name;
int tablePos, postFmt, stringIdx, stringPos;
GBool ok;
int i, j, n, m;
ok = gTrue;
if ((i = seekTable("post")) < 0) {
return;
}
tablePos = tables[i].offset;
postFmt = getU32BE(tablePos, &ok);
if (!ok) {
goto err;
}
if (postFmt == 0x00010000) {
nameToGID = new GooHash(gTrue);
for (i = 0; i < 258; ++i) {
nameToGID->add(new GooString(macGlyphNames[i]), i);
}
} else if (postFmt == 0x00020000) {
nameToGID = new GooHash(gTrue);
n = getU16BE(tablePos + 32, &ok);
if (!ok) {
goto err;
}
if (n > nGlyphs) {
n = nGlyphs;
}
stringIdx = 0;
stringPos = tablePos + 34 + 2*n;
for (i = 0; i < n; ++i) {
j = getU16BE(tablePos + 34 + 2*i, &ok);
if (j < 258) {
nameToGID->removeInt(macGlyphNames[j]);
nameToGID->add(new GooString(macGlyphNames[j]), i);
} else {
j -= 258;
if (j != stringIdx) {
for (stringIdx = 0, stringPos = tablePos + 34 + 2*n;
stringIdx < j;
++stringIdx, stringPos += 1 + getU8(stringPos, &ok)) ;
if (!ok) {
goto err;
}
}
m = getU8(stringPos, &ok);
if (!ok || !checkRegion(stringPos + 1, m)) {
goto err;
}
name = new GooString((char *)&file[stringPos + 1], m);
nameToGID->removeInt(name);
nameToGID->add(name, i);
++stringIdx;
stringPos += 1 + m;
}
}
} else if (postFmt == 0x00028000) {
nameToGID = new GooHash(gTrue);
for (i = 0; i < nGlyphs; ++i) {
j = getU8(tablePos + 32 + i, &ok);
if (!ok) {
goto err;
}
if (j < 258) {
nameToGID->removeInt(macGlyphNames[j]);
nameToGID->add(new GooString(macGlyphNames[j]), i);
}
}
}
return;
err:
if (nameToGID) {
delete nameToGID;
nameToGID = NULL;
}
}
int FoFiTrueType::seekTable(char *tag) {
Guint tagI;
int i;
tagI = ((tag[0] & 0xff) << 24) |
((tag[1] & 0xff) << 16) |
((tag[2] & 0xff) << 8) |
(tag[3] & 0xff);
for (i = 0; i < nTables; ++i) {
if (tables[i].tag == tagI) {
return i;
}
}
return -1;
}
Guint FoFiTrueType::charToTag(const char *tagName)
{
int n = strlen(tagName);
Guint tag = 0;
int i;
if (n > 4) n = 4;
for (i = 0;i < n;i++) {
tag <<= 8;
tag |= tagName[i] & 0xff;
}
for (;i < 4;i++) {
tag <<= 8;
tag |= ' ';
}
return tag;
}
/*
setup GSUB table data
Only supporting vertical text substitution.
*/
int FoFiTrueType::setupGSUB(const char *tagName)
{
Guint gsubTable;
unsigned int i;
Guint scriptList, featureList;
Guint scriptCount;
Guint tag;
Guint scriptTable = 0;
Guint langSys;
Guint featureCount;
Guint featureIndex;
Guint ftable = 0;
Guint llist;
Guint scriptTag;
int x;
Guint pos;
if (tagName == 0) {
gsubFeatureTable = 0;
return 0;
}
scriptTag = charToTag(tagName);
/* read GSUB Header */
if ((x = seekTable("GSUB")) < 0) {
return 0; /* GSUB table not found */
}
gsubTable = tables[x].offset;
pos = gsubTable+4;
scriptList = getU16BE(pos,&parsedOk);
pos += 2;
featureList = getU16BE(pos,&parsedOk);
pos += 2;
llist = getU16BE(pos,&parsedOk);
gsubLookupList = llist+gsubTable; /* change to offset from top of file */
/* read script list table */
pos = gsubTable+scriptList;
scriptCount = getU16BE(pos,&parsedOk);
pos += 2;
/* find script */
for (i = 0;i < scriptCount;i++) {
tag = getU32BE(pos,&parsedOk);
pos += 4;
scriptTable = getU16BE(pos,&parsedOk);
pos += 2;
if (tag == scriptTag) {
/* found */
break;
}
}
if (i >= scriptCount) {
/* not found */
return 0;
}
/* read script table */
/* use default language system */
pos = gsubTable+scriptList+scriptTable;
langSys = getU16BE(pos,&parsedOk);/* default language system */
/* read LangSys table */
if (langSys == 0) {
/* no ldefault LangSys */
return 0;
}
pos = gsubTable+scriptList+scriptTable+langSys+2;
featureIndex = getU16BE(pos,&parsedOk); /* ReqFeatureIndex */
pos += 2;
if (featureIndex != 0xffff) {
Guint tpos;
/* read feature record */
tpos = gsubTable+featureList;
featureCount = getU16BE(tpos,&parsedOk);
tpos = gsubTable+featureList+2+featureIndex*(4+2);
tag = getU32BE(tpos,&parsedOk);
tpos += 4;
if (tag == vrt2Tag) {
/* vrt2 is preferred, overwrite vert */
ftable = getU16BE(tpos,&parsedOk);
/* convert to offset from file top */
gsubFeatureTable = ftable+gsubTable+featureList;
return 0;
} else if (tag == vertTag) {
ftable = getU16BE(tpos,&parsedOk);
}
}
featureCount = getU16BE(pos,&parsedOk);
pos += 2;
/* find 'vrt2' or 'vert' feature */
for (i = 0;i < featureCount;i++) {
Guint oldPos;
featureIndex = getU16BE(pos,&parsedOk);
pos += 2;
oldPos = pos; /* save position */
/* read feature record */
pos = gsubTable+featureList+2+featureIndex*(4+2);
tag = getU32BE(pos,&parsedOk);
pos += 4;
if (tag == vrt2Tag) {
/* vrt2 is preferred, overwrite vert */
ftable = getU16BE(pos,&parsedOk);
break;
} else if (ftable == 0 && tag == vertTag) {
ftable = getU16BE(pos,&parsedOk);
}
pos = oldPos; /* restore old position */
}
if (ftable == 0) {
/* vert nor vrt2 are not found */
return 0;
}
/* convert to offset from file top */
gsubFeatureTable = ftable+gsubTable+featureList;
return 0;
}
Guint FoFiTrueType::doMapToVertGID(Guint orgGID)
{
Guint lookupCount;
Guint lookupListIndex;
Guint i;
Guint gid = 0;
Guint pos;
pos = gsubFeatureTable+2;
lookupCount = getU16BE(pos,&parsedOk);
pos += 2;
for (i = 0;i < lookupCount;i++) {
lookupListIndex = getU16BE(pos,&parsedOk);
pos += 2;
if ((gid = scanLookupList(lookupListIndex,orgGID)) != 0) {
break;
}
}
return gid;
}
Guint FoFiTrueType::mapToVertGID(Guint orgGID)
{
Guint mapped;
if (gsubFeatureTable == 0) return orgGID;
if ((mapped = doMapToVertGID(orgGID)) != 0) {
return mapped;
}
return orgGID;
}
Guint FoFiTrueType::scanLookupList(Guint listIndex, Guint orgGID)
{
Guint lookupTable;
Guint subTableCount;
Guint subTable;
Guint i;
Guint gid = 0;
Guint pos;
if (gsubLookupList == 0) return 0; /* no lookup list */
pos = gsubLookupList+2+listIndex*2;
lookupTable = getU16BE(pos,&parsedOk);
/* read lookup table */
pos = gsubLookupList+lookupTable+4;
subTableCount = getU16BE(pos,&parsedOk);
pos += 2;;
for (i = 0;i < subTableCount;i++) {
subTable = getU16BE(pos,&parsedOk);
pos += 2;
if ((gid = scanLookupSubTable(gsubLookupList+lookupTable+subTable,orgGID))
!= 0) break;
}
return gid;
}
Guint FoFiTrueType::scanLookupSubTable(Guint subTable, Guint orgGID)
{
Guint format;
Guint coverage;
int delta;
int glyphCount;
Guint substitute;
Guint gid = 0;
int coverageIndex;
int pos;
pos = subTable;
format = getU16BE(pos,&parsedOk);
pos += 2;
coverage = getU16BE(pos,&parsedOk);
pos += 2;
if ((coverageIndex =
checkGIDInCoverage(subTable+coverage,orgGID)) >= 0) {
switch (format) {
case 1:
/* format 1 */
delta = getS16BE(pos,&parsedOk);
pos += 2;
gid = orgGID+delta;
break;
case 2:
/* format 2 */
glyphCount = getS16BE(pos,&parsedOk);
pos += 2;
if (glyphCount > coverageIndex) {
pos += coverageIndex*2;
substitute = getU16BE(pos,&parsedOk);
gid = substitute;
}
break;
default:
/* unknown format */
break;
}
}
return gid;
}
int FoFiTrueType::checkGIDInCoverage(Guint coverage, Guint orgGID)
{
int index = -1;
Guint format;
Guint count;
Guint i;
Guint pos;
pos = coverage;
format = getU16BE(pos,&parsedOk);
pos += 2;
switch (format) {
case 1:
count = getU16BE(pos,&parsedOk);
pos += 2;
for (i = 0;i < count;i++) {
Guint gid;
gid = getU16BE(pos,&parsedOk);
pos += 2;
if (gid == orgGID) {
/* found */
index = i;
break;
} else if (gid > orgGID) {
/* not found */
break;
}
}
break;
case 2:
count = getU16BE(pos,&parsedOk);
pos += 2;
for (i = 0;i < count;i++) {
Guint startGID, endGID;
Guint startIndex;
startGID = getU16BE(pos,&parsedOk);
pos += 2;
endGID = getU16BE(pos,&parsedOk);
pos += 2;
startIndex = getU16BE(pos,&parsedOk);
pos += 2;
if (startGID <= orgGID && orgGID <= endGID) {
/* found */
index = startIndex+orgGID-startGID;
break;
} else if (orgGID <= endGID) {
/* not found */
break;
}
}
break;
default:
break;
}
return index;
}