From 835e373b3eeaabcd0621ed6798ab500f37982fae Mon Sep 17 00:00:00 2001 From: Calvin Morrison Date: Wed, 5 Apr 2023 14:13:39 -0400 Subject: xpdf-no-select-disable --- fofi/FoFiTrueType.cc | 2461 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2461 insertions(+) create mode 100644 fofi/FoFiTrueType.cc (limited to 'fofi/FoFiTrueType.cc') diff --git a/fofi/FoFiTrueType.cc b/fofi/FoFiTrueType.cc new file mode 100644 index 0000000..57b12b1 --- /dev/null +++ b/fofi/FoFiTrueType.cc @@ -0,0 +1,2461 @@ +//======================================================================== +// +// FoFiTrueType.cc +// +// Copyright 1999-2003 Glyph & Cog, LLC +// +//======================================================================== + +#include + +#ifdef USE_GCC_PRAGMAS +#pragma implementation +#endif + +#include +#include +#if HAVE_STD_SORT +#include +#endif +#include "gtypes.h" +#include "gmem.h" +#include "gmempp.h" +#include "GString.h" +#include "GHash.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 + +#if HAVE_STD_SORT + +struct cmpTrueTypeLocaOffsetFunctor { + bool operator()(const TrueTypeLoca &loca1, const TrueTypeLoca &loca2) { + if (loca1.origOffset == loca2.origOffset) { + return loca1.idx < loca2.idx; + } + return loca1.origOffset < loca2.origOffset; + } +}; + +struct cmpTrueTypeLocaIdxFunctor { + bool operator()(const TrueTypeLoca &loca1, const TrueTypeLoca &loca2) { + return loca1.idx < loca2.idx; + } +}; + +struct cmpTrueTypeTableTagFunctor { + bool operator()(const TrueTypeTable &tab1, const TrueTypeTable &tab2) { + return tab1.tag < tab2.tag; + } +}; + +#else // HAVE_STD_SORT + +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; +} + +#endif // HAVE_STD_SORT + +//------------------------------------------------------------------------ + +struct T42Table { + const 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 const 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 fontNum, + GBool allowHeadlessCFF) { + FoFiTrueType *ff; + + ff = new FoFiTrueType(fileA, lenA, gFalse, fontNum, gFalse, allowHeadlessCFF); + if (!ff->parsedOk) { + delete ff; + return NULL; + } + return ff; +} + +FoFiTrueType *FoFiTrueType::load(char *fileName, int fontNum, + GBool allowHeadlessCFF) { + FoFiTrueType *ff; + char *fileA; + int lenA, n; + GBool isDfontA; + + if (!(fileA = FoFiBase::readFile(fileName, &lenA))) { + return NULL; + } + n = (int)strlen(fileName); + isDfontA = n >= 6 && !strcmp(fileName + n - 6, ".dfont"); + ff = new FoFiTrueType(fileA, lenA, gTrue, fontNum, isDfontA, + allowHeadlessCFF); + if (!ff->parsedOk) { + delete ff; + return NULL; + } + return ff; +} + +FoFiTrueType::FoFiTrueType(char *fileA, int lenA, GBool freeFileDataA, + int fontNum, GBool isDfontA, + GBool allowHeadlessCFF): + FoFiBase(fileA, lenA, freeFileDataA) +{ + tables = NULL; + nTables = 0; + cmaps = NULL; + nCmaps = 0; + nameToGID = NULL; + isDfont = isDfontA; + isTTC = gFalse; + parsedOk = gFalse; + + parse(fontNum, allowHeadlessCFF); +} + +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; +} + +int FoFiTrueType::mapCodeToGID(int i, int c) { + int gid; + int segCnt, segEnd, segStart, segDelta, segOffset; + int 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 < 0 || c >= cmaps[i].len - 6) { + return 0; + } + gid = getU8(pos + 6 + c, &ok); + break; + case 2: + // this only handles single-byte codes + if (c < 0 || c > 0xff) { + return 0; + } + // check that: subHeaderKeys[0] = 0 + // subHeaders[0].firstCode = 0 + // subHeaders[0].entryCount = 256 + // subHeaders[0].idDelta = 0 + if (getU16BE(pos + 6, &ok) != 0 || + getU16BE(pos + 518 + 0, &ok) != 0 || + getU16BE(pos + 518 + 2, &ok) != 256 || + getU16BE(pos + 518 + 4, &ok) != 0) { + return 0; + } + // subHeaders[0].idRangeOffset is a byte offset from itself + pos = pos + 518 + 6 + getU16BE(pos + 518 + 6, &ok); + gid = getU16BE(pos + 2 * 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; + default: + return 0; + } + if (!ok) { + return 0; + } + return gid; +} + +int FoFiTrueType::mapNameToGID(char *name) { + if (!nameToGID) { + return 0; + } + return nameToGID->lookupInt(name); +} + +GBool FoFiTrueType::getCFFBlock(char **start, int *length) { + int i; + + if (!openTypeCFF) { + return gFalse; + } + i = seekTable("CFF "); + if (!checkRegion(tables[i].offset, tables[i].len)) { + return gFalse; + } + *start = (char *)file + tables[i].offset; + *length = tables[i].len; + return gTrue; +} + +int *FoFiTrueType::getCIDToGIDMap(int *nCIDs) { + char *start; + int length; + FoFiType1C *ff; + int *map; + + *nCIDs = 0; + if (!getCFFBlock(&start, &length)) { + return NULL; + } + if (!(ff = FoFiType1C::make(start, length))) { + 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::getFontMatrix(double *mat) { + char *start; + int length; + FoFiType1C *ff; + + if (!getCFFBlock(&start, &length)) { + return; + } + if (!(ff = FoFiType1C::make(start, length))) { + return; + } + ff->getFontMatrix(mat); + delete ff; +} + +struct FoFiTrueTypeTrickyFont { + int cvtLen; + Guint cvtChecksum; + int fpgmLen; + Guint fpgmChecksum; + int prepLen; + Guint prepChecksum; +}; + +// This data was taken from the FreeType project. +static FoFiTrueTypeTrickyFont trickyFonts[] = { + { 0x000002e4, 0x05bcf058, // MingLiU 1995 + 0x000087c4, 0x28233bf1, + 0x000001e1, 0xa344a1ea }, + { 0x000002e4, 0x05bcf058, // MingLiU 1996- + 0x000087c4, 0x28233bf1, + 0x000001e1, 0xa344a1eb }, + { 0x00000350, 0x12c3ebb2, // DFGothic-EB + 0x000087a7, 0xb680ee64, + 0x00000758, 0xce939563 }, + { 0x00000350, 0x11e5ead4, // DFGyoSho-Lt + 0x0000bc85, 0xce5956e9, + 0x00000045, 0x8272f416 }, + { 0x00000350, 0x1262eb4e, // DFHSGothic-W5 + 0x00007940, 0xe86a5d64, + 0x000005ff, 0x7850f729 }, + { 0x00000350, 0x122deb0a, // DFHSMincho-W3 + 0x0000859b, 0x3d16328a, + 0x000002cb, 0xa93fc33b }, + { 0x00000350, 0x125feb26, // DFHSMincho-W7 + 0x00007ee1, 0xa5acc982, + 0x0000041f, 0x90999196 }, + { 0x00000350, 0x11e5ead4, // DFKaiShu + 0x00009063, 0x5a30ca3b, + 0x0000007e, 0x13a42602 }, + { 0x00000350, 0x11e5ead4, // DFKaiShu2 + 0x00008998, 0xa6e78c01, + 0x0000007e, 0x13a42602 }, + { 0x00000008, 0xfffbfffc, // HuaTianKaiTi + 0x0000bea2, 0x9c9e48b8, + 0x00000008, 0x70020112 }, + { 0x00000008, 0xfffbfffc, // HuaTianSongTi + 0x00017c39, 0x0a5a0483, + 0x00000008, 0x70020112 }, + { 0x00000000, 0x00000000, // NEC fadpop7.ttf + 0x000000e5, 0x40c92555, + 0x0000117c, 0xa39b58e3 }, + { 0x00000000, 0x00000000, // NEC fadrei5.ttf + 0x000000e5, 0x33c41652, + 0x00000f6a, 0x26d6c52a }, + { 0x00000000, 0x00000000, // NEC fangot7.ttf + 0x0000019d, 0x6db1651d, + 0x00002492, 0x6c6e4b03 }, + { 0x00000000, 0x00000000, // NEC fangyo5.ttf + 0x000000e5, 0x40c92555, + 0x0000117c, 0xde51fad0 }, + { 0x00000000, 0x00000000, // NEC fankyo5.ttf + 0x000000e5, 0x85e47664, + 0x00001caa, 0xa6c62831 }, + { 0x00000000, 0x00000000, // NEC fanrgo5.ttf + 0x0000019d, 0x2d891cfd, + 0x00001de8, 0xa0604633 }, + { 0x00000000, 0x00000000, // NEC fangot5.ttc + 0x000001cb, 0x40aa774c, + 0x00001f9a, 0x9b5caa96 }, + { 0x00000000, 0x00000000, // NEC fanmin3.ttc + 0x00000141, 0x0d3de9cb, + 0x00002280, 0xd4127766 }, + { 0x00000000, 0x00000000, // NEC FA-Gothic, 1996 + 0x000001f0, 0x4a692698, + 0x00001fca, 0x340d4346 }, + { 0x00000000, 0x00000000, // NEC FA-Minchou, 1996 + 0x00000166, 0xcd34c604, + 0x000022b0, 0x6cf31046 }, + { 0x00000000, 0x00000000, // NEC FA-RoundGothicB, 1996 + 0x0000019d, 0x5da75315, + 0x000022e0, 0x40745a5f }, + { 0x00000000, 0x00000000, // NEC FA-RoundGothicM, 1996 + 0x000001c2, 0xf055fc48, + 0x00001e18, 0x3900ded3 }, + { 0x00000060, 0x00170003, // MINGLI, 1992 + 0x000058aa, 0xdbb4306e, + 0x00000035, 0xd643482a } +}; + +#define nTrickyFonts ((int)(sizeof(trickyFonts) / sizeof(FoFiTrueTypeTrickyFont))) + +// This looks at the length and checksum values for the cvt, fpgm, and +// prep tables. The theory is that those tables will be the same, +// even if the font is renamed and/or subsetted. +GBool FoFiTrueType::checkForTrickyCJK() { + int cvtIdx, fpgmIdx, prepIdx; + int cvtLen, fpgmLen, prepLen; + Guint cvtChecksum, fpgmChecksum, prepChecksum; + int i; + + if ((cvtIdx = seekTable("cvt ")) >= 0) { + cvtLen = tables[cvtIdx].len; + cvtChecksum = tables[cvtIdx].checksum; + } else { + cvtLen = 0; + cvtChecksum = 0; + } + if ((fpgmIdx = seekTable("fpgm")) >= 0) { + fpgmLen = tables[fpgmIdx].len; + fpgmChecksum = tables[fpgmIdx].checksum; + } else { + fpgmLen = 0; + fpgmChecksum = 0; + } + if ((prepIdx = seekTable("prep")) >= 0) { + prepLen = tables[prepIdx].len; + prepChecksum = tables[prepIdx].checksum; + } else { + prepLen = 0; + prepChecksum = 0; + } + + for (i = 0; i < nTrickyFonts; ++i) { + if (cvtLen == trickyFonts[i].cvtLen && + cvtChecksum == trickyFonts[i].cvtChecksum && + fpgmLen == trickyFonts[i].fpgmLen && + fpgmChecksum == trickyFonts[i].fpgmChecksum && + prepLen == trickyFonts[i].prepLen && + prepChecksum == trickyFonts[i].prepChecksum) { + return gTrue; + } + } + return gFalse; +} + +void FoFiTrueType::convertToType42(char *psName, char **encoding, + int *codeToGID, + FoFiOutputFunc outputFunc, + void *outputStream) { + GString *buf; + int maxUsedGlyph; + GBool ok; + + if (openTypeCFF) { + return; + } + + // write the header + ok = gTrue; + buf = GString::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, (int)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 = GString::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, &maxUsedGlyph); + + // end the dictionary and define the font + (*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40); +} + +void FoFiTrueType::convertToType1(char *psName, const char **newEncoding, + GBool ascii, FoFiOutputFunc outputFunc, + void *outputStream) { + char *start; + int length; + FoFiType1C *ff; + + if (!getCFFBlock(&start, &length)) { + return; + } + if (!(ff = FoFiType1C::make(start, length))) { + return; + } + ff->convertToType1(psName, newEncoding, ascii, outputFunc, outputStream); + delete ff; +} + +void FoFiTrueType::convertToCIDType2(char *psName, + int *cidMap, int nCIDs, + GBool needVerticalMetrics, + FoFiOutputFunc outputFunc, + void *outputStream) { + GString *buf; + int cid, maxUsedGlyph; + GBool ok; + int i, j, k; + + if (openTypeCFF) { + return; + } + + // write the header + ok = gTrue; + buf = GString::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, (int)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 = GString::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 = GString::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 = GString::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 = GString::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 = GString::format(" {0:d} string 0 1 {1:d} {{\n", 2 * j, j - 1); + (*outputFunc)(outputStream, buf->getCString(), buf->getLength()); + delete buf; + buf = GString::format(" 2 copy dup 2 mul exch {0:d} add -8 bitshift put\n", + i); + (*outputFunc)(outputStream, buf->getCString(), buf->getLength()); + delete buf; + buf = GString::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 = GString::format("/CIDMap {0:d} string\n", 2 * nGlyphs); + (*outputFunc)(outputStream, buf->getCString(), buf->getLength()); + delete buf; + buf = GString::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 = GString::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, &maxUsedGlyph); + + // end the dictionary and define the font + (*outputFunc)(outputStream, + "CIDFontName currentdict end /CIDFont defineresource pop\n", + 56); +} + +void FoFiTrueType::convertToCIDType0(char *psName, int *cidMap, int nCIDs, + FoFiOutputFunc outputFunc, + void *outputStream) { + char *start; + int length; + FoFiType1C *ff; + + if (!getCFFBlock(&start, &length)) { + return; + } + if (!(ff = FoFiType1C::make(start, length))) { + return; + } + ff->convertToCIDType0(psName, cidMap, nCIDs, outputFunc, outputStream); + delete ff; +} + +void FoFiTrueType::convertToType0(char *psName, int *cidMap, int nCIDs, + GBool needVerticalMetrics, + FoFiOutputFunc outputFunc, + void *outputStream) { + GString *buf; + GString *sfntsName; + int maxUsedGlyph, n, i, j; + + if (openTypeCFF) { + return; + } + + // write the Type 42 sfnts array + sfntsName = (new GString(psName))->append("_sfnts"); + cvtSfnts(outputFunc, outputStream, sfntsName, needVerticalMetrics, + &maxUsedGlyph); + delete sfntsName; + + // write the descendant Type 42 fonts + // (The following is a kludge: nGlyphs is the glyph count from the + // maxp table; maxUsedGlyph is the max glyph number that has a + // non-zero-length description, from the loca table. The problem is + // that some TrueType font subsets fail to change the glyph count, + // i.e., nGlyphs is much larger than maxUsedGlyph+1, which results + // in an unnecessarily huge Type 0 font. But some other PDF files + // have fonts with only zero or one used glyph, and a content stream + // that refers to one of the unused glyphs -- this results in PS + // errors if we simply use maxUsedGlyph+1 for the Type 0 font. So + // we compromise by always defining at least 256 glyphs.) + if (cidMap) { + n = nCIDs; + } else if (nGlyphs > maxUsedGlyph + 256) { + if (maxUsedGlyph <= 255) { + n = 256; + } else { + n = maxUsedGlyph + 1; + } + } else { + n = nGlyphs; + } + for (i = 0; i < n; i += 256) { + (*outputFunc)(outputStream, "10 dict begin\n", 14); + (*outputFunc)(outputStream, "/FontName /", 11); + (*outputFunc)(outputStream, psName, (int)strlen(psName)); + buf = GString::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 = GString::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, (int)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 = GString::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 = GString::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, (int)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 = GString::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, (int)strlen(psName)); + buf = GString::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, int *cidMap, int nCIDs, + FoFiOutputFunc outputFunc, + void *outputStream) { + char *start; + int length; + FoFiType1C *ff; + + if (!getCFFBlock(&start, &length)) { + return; + } + if (!(ff = FoFiType1C::make(start, length))) { + return; + } + ff->convertToType0(psName, cidMap, nCIDs, outputFunc, outputStream); + delete ff; +} + +GBool FoFiTrueType::writeTTF(FoFiOutputFunc outputFunc, + void *outputStream, char *name, + int *codeToGID, Guchar *replacementCmapTable, + int replacementCmapTableLen) { + // this substitute cmap table maps char code ffff to glyph 0, + // with tables for MacRoman and MS Unicode + static char cmapTab[44] = { + 0, 0, // table version number + 0, 2, // number of encoding tables + 0, 1, // platform ID + 0, 0, // encoding ID + 0, 0, 0, 20, // offset of subtable + 0, 3, // platform ID + 0, 1, // encoding ID + 0, 0, 0, 20, // 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 + (char)0xff, (char)0xff, // startCount[0] + 0, 1, // idDelta[0] + 0, 0 // idRangeOffset[0] + }; + 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 + 0x01, (char)0x90, // usWeightClass + 0, 5, // 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 + 0x20, 0x00, // usWinAscent + 0x20, 0x00, // usWinDescent + 0, 0, 0, 1, // ulCodePageRange1 + 0, 0, 0, 0 // ulCodePageRange2 + }; + GBool missingCmap, missingName, missingPost, missingOS2; + GBool unsortedLoca, emptyCmap, badCmapLen, abbrevHMTX; + int nZeroLengthTables, nBogusTables; + 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 gFalse; + } + + // 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; + glyfLen = tables[seekTable("glyf")].len; + 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 (locaTable[i].origOffset < 0 || + locaTable[i].origOffset > glyfLen) { + locaTable[i].origOffset = glyfLen; + unsortedLoca = gTrue; + } + 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 and bogus tags + nZeroLengthTables = nBogusTables = 0; + for (i = 0; i < nTables; ++i) { + if (tables[i].len == 0) { + ++nZeroLengthTables; + if (tables[i].tag == cmapTag) { + missingCmap = gTrue; + } else if (tables[i].tag == nameTag) { + missingName = gTrue; + } else if (tables[i].tag == postTag) { + missingPost = gTrue; + } else if (tables[i].tag == os2Tag) { + missingOS2 = gTrue; + } + } else if (!(tables[i].tag & 0xe0000000) || + !(tables[i].tag & 0x00e00000) || + !(tables[i].tag & 0x0000e000) || + !(tables[i].tag & 0x000000e0)) { + // tags where any of the bytes are < 0x20 are probably bogus + // (the TrueType spec uses ASCII sequences for tags) -- this + // catches problems where the number of tables given in the + // header is too large, and so gibberish data is read at the end + // of the table directory + ++nBogusTables; + } + } + + // check for an empty cmap table or an incorrect cmap table length + emptyCmap = badCmapLen = gFalse; + cmapLen = 0; // make gcc happy + if (!missingCmap) { + if (nCmaps == 0) { + emptyCmap = gTrue; + } else { + 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 && !emptyCmap && !badCmapLen && !abbrevHMTX && + nZeroLengthTables == 0 && nBogusTables == 0 && + !name && !codeToGID && !replacementCmapTable && !isDfont && !isTTC) { + (*outputFunc)(outputStream, (char *)file, len); + gfree(locaTable); + return gFalse; + } + + // 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) { +#if HAVE_STD_SORT + std::sort(locaTable, locaTable + nGlyphs + 1, + cmpTrueTypeLocaOffsetFunctor()); +#else + qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), + &cmpTrueTypeLocaOffset); +#endif + for (i = 0; i < nGlyphs; ++i) { + locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset; + } + locaTable[nGlyphs].len = 0; +#if HAVE_STD_SORT + std::sort(locaTable, locaTable + nGlyphs + 1, cmpTrueTypeLocaIdxFunctor()); +#else + qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), + &cmpTrueTypeLocaIdx); +#endif + // if the last entry in the loca is not the max offset (size of + // the glyf table), something is wrong -- work around the problem + // by forcing the last sorted entry to have a zero length + locaTable[nGlyphs].len = 0; + 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 = (int)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] = (char)(i + 1); + // string length + newNameTab[6 + i*12 + 8] = (char)(i+1 == 2 ? 0 : ((2*n) >> 8)); + newNameTab[6 + i*12 + 9] = (char)(i+1 == 2 ? 14 : ((2*n) & 0xff)); + // string offset + newNameTab[6 + i*12 + 10] = (char)(next >> 8); + newNameTab[6 + i*12 + 11] = (char)(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 && !replacementCmapTable) { + 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) { + if (codeToGID[i] < 0) { + //~ this may not be correct - we want this character to never be + //~ displayed, but mapping it to the notdef glyph may result in + //~ little boxes being displayed + newCmapTab[44 + 2*i] = 0; + newCmapTab[44 + 2*i + 1] = 0; + } else { + newCmapTab[44 + 2*i] = (char)(codeToGID[i] >> 8); + newCmapTab[44 + 2*i + 1] = (char)(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] = (char)getU8(pos++, &ok); + } + newHHEATab[34] = (char)(nGlyphs >> 8); + newHHEATab[35] = (char)(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 ] = (char)(advWidth >> 8); + newHMTXTab[4*i + 1] = (char)(advWidth & 0xff); + newHMTXTab[4*i + 2] = (char)(lsb >> 8); + newHMTXTab[4*i + 3] = (char)(lsb & 0xff); + } + for (; i < nGlyphs; ++i) { + lsb = getU16BE(pos, &ok); + pos += 2; + newHMTXTab[4*i ] = (char)(advWidth >> 8); + newHMTXTab[4*i + 1] = (char)(advWidth & 0xff); + newHMTXTab[4*i + 2] = (char)(lsb >> 8); + newHMTXTab[4*i + 3] = (char)(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 - nBogusTables + + (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 && + (tables[i].tag & 0xe0000000) && + (tables[i].tag & 0x00e00000) && + (tables[i].tag & 0x0000e000) && + (tables[i].tag & 0x000000e0)) { + newTables[j] = tables[i]; + newTables[j].origOffset = tables[i].offset; + if (checkRegion(tables[i].offset, tables[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); + } + } else { + // we'll write four zero bytes for this table + newTables[j].len = 4; + } + if (newTables[j].tag == cmapTag && replacementCmapTable) { + newTables[j].len = replacementCmapTableLen; + newTables[j].checksum = computeTableChecksum(replacementCmapTable, + replacementCmapTableLen); + } else if (newTables[j].tag == cmapTag && codeToGID) { + newTables[j].len = newCmapLen; + newTables[j].checksum = computeTableChecksum((Guchar *)newCmapTab, + newCmapLen); + } else if (newTables[j].tag == cmapTag && emptyCmap) { + newTables[j].checksum = computeTableChecksum((Guchar *)cmapTab, + sizeof(cmapTab)); + newTables[j].len = sizeof(cmapTab); + } 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 (replacementCmapTable) { + newTables[j].checksum = computeTableChecksum(replacementCmapTable, + replacementCmapTableLen); + newTables[j].len = replacementCmapTableLen; + } else 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; + } +#if HAVE_STD_SORT + std::sort(newTables, newTables + nNewTables, cmpTrueTypeTableTagFunctor()); +#else + qsort(newTables, nNewTables, sizeof(TrueTypeTable), + &cmpTrueTypeTableTag); +#endif + 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] = (char)(fileChecksum >> 24); + checksumBuf[1] = (char)(fileChecksum >> 16); + checksumBuf[2] = (char)(fileChecksum >> 8); + checksumBuf[3] = (char)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 && replacementCmapTable) { + (*outputFunc)(outputStream, (char *)replacementCmapTable, + newTables[i].len); + } 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); + gfree(locaTable); + return gTrue; +} + +void FoFiTrueType::cvtEncoding(char **encoding, + FoFiOutputFunc outputFunc, + void *outputStream) { + const char *name; + GString *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 = GString::format("dup {0:d} /", i); + (*outputFunc)(outputStream, buf->getCString(), buf->getLength()); + delete buf; + (*outputFunc)(outputStream, name, (int)strlen(name)); + (*outputFunc)(outputStream, " put\n", 5); + } + } else { + for (i = 0; i < 256; ++i) { + buf = GString::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, + int *codeToGID, + FoFiOutputFunc outputFunc, + void *outputStream) { + char *name; + GString *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); + + // 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 { + snprintf(buf2, sizeof(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, (int)strlen(name)); + buf = GString::format(" {0:d} def\n", k); + (*outputFunc)(outputStream, buf->getCString(), buf->getLength()); + delete buf; + } + } + } + + (*outputFunc)(outputStream, "end readonly def\n", 17); +} + +void FoFiTrueType::cvtSfnts(FoFiOutputFunc outputFunc, + void *outputStream, GString *name, + GBool needVerticalMetrics, + int *maxUsedGlyph) { + Guchar headData[54]; + TrueTypeLoca *locaTable; + Guchar *locaData; + TrueTypeTable newTables[nT42Tables]; + Guchar tableDir[12 + nT42Tables*16]; + GBool ok; + Guint checksum; + int nNewTables; + int glyfTableLen, 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; + + // check for a bogus loca format field in the 'head' table + // (I've encountered fonts with loca format set to 0x0100 instead of 0x0001) + if (locaFmt != 0 && locaFmt != 1) { + headData[50] = 0; + headData[51] = 1; + } + + // 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, 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) + // + // NB: a glyph description containing 12 zero bytes should be a + // valid empty glyph (from my reading of the TrueType spec), but + // Acrobat chokes on this (which is an issue when an Xpdf-generated + // PS file is converted back to PDF - with Ghostscript or + // Distiller), so we drop any glyph descriptions of 12 or fewer + // bytes -- an empty glyph description generates an empty glyph with + // no errors + locaTable = (TrueTypeLoca *)gmallocn(nGlyphs + 1, sizeof(TrueTypeLoca)); + i = seekTable("loca"); + pos = tables[i].offset; + i = seekTable("glyf"); + glyfTableLen = tables[i].len; + 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); + } + if (locaTable[i].origOffset < 0 || + locaTable[i].origOffset > glyfTableLen) { + locaTable[i].origOffset = glyfTableLen; + } + } +#if HAVE_STD_SORT + std::sort(locaTable, locaTable + nGlyphs + 1, + cmpTrueTypeLocaOffsetFunctor()); +#else + qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), + &cmpTrueTypeLocaOffset); +#endif + for (i = 0; i < nGlyphs; ++i) { + locaTable[i].len = locaTable[i+1].origOffset - locaTable[i].origOffset; + } + locaTable[nGlyphs].len = 0; +#if HAVE_STD_SORT + std::sort(locaTable, locaTable + nGlyphs + 1, cmpTrueTypeLocaIdxFunctor()); +#else + qsort(locaTable, nGlyphs + 1, sizeof(TrueTypeLoca), + &cmpTrueTypeLocaIdx); +#endif + pos = 0; + *maxUsedGlyph = -1; + for (i = 0; i <= nGlyphs; ++i) { + locaTable[i].newOffset = pos; + if (locaTable[i].len > 12) { + pos += locaTable[i].len; + if (pos & 3) { + pos += 4 - (pos & 3); + } + *maxUsedGlyph = i; + } + } + + // 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) { + if (locaTable[j].len > 12) { + 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] = (Guchar)(advance / 256); // max advance height + vheaTab[11] = (Guchar)(advance % 256); + length = sizeof(vheaTab); + checksum = computeTableChecksum(vheaTab, length); + } else if (needVerticalMetrics && i == t42VmtxTable) { + length = 4 + (nGlyphs - 1) * 2; + vmtxTab = (Guchar *)gmalloc(length); + vmtxTab[0] = (Guchar)(advance / 256); + vmtxTab[1] = (Guchar)(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] = (Guchar)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 > 12 && + 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); + } + } + } + } + + // end the sfnts array + (*outputFunc)(outputStream, "] def\n", 6); + + gfree(locaData); + gfree(locaTable); + if (vmtxTab) { + gfree(vmtxTab); + } +} + +void FoFiTrueType::dumpString(Guchar *s, int length, + FoFiOutputFunc outputFunc, + void *outputStream) { + GString *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 = GString::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(int fontNum, GBool allowHeadlessCFF) { + Guint topTag; + int offset, pos, ver, i, j, k; + + parsedOk = gTrue; + + // check for a dfont or TrueType collection (TTC) + // offset = start of actual TrueType font file (table positions are + // relative to this + // pos = position of table directory (relative to offset) + if (isDfont) { + parseDfont(fontNum, &offset, &pos); + } else { + offset = 0; + topTag = getU32BE(0, &parsedOk); + if (!parsedOk) { + return; + } + if (topTag == ttcfTag) { + parseTTC(fontNum, &pos); + } else { + pos = 0; + } + } + if (!parsedOk) { + return; + } + + // check the sfnt version + ver = getU32BE(offset + pos, &parsedOk); + if (!parsedOk) { + return; + } + openTypeCFF = ver == 0x4f54544f; // 'OTTO' + + // read the table directory + nTables = getU16BE(offset + pos + 4, &parsedOk); + if (!parsedOk) { + return; + } + tables = (TrueTypeTable *)gmallocn(nTables, sizeof(TrueTypeTable)); + pos += 12; + j = 0; + for (i = 0; i < nTables; ++i) { + tables[j].tag = getU32BE(offset + pos, &parsedOk); + tables[j].checksum = getU32BE(offset + pos + 4, &parsedOk); + tables[j].offset = offset + (int)getU32BE(offset + pos + 8, &parsedOk); + tables[j].len = (int)getU32BE(offset + pos + 12, &parsedOk); + if (tables[j].offset >= 0 && + tables[j].len >= 0 && + tables[j].offset + tables[j].len >= tables[j].offset && + tables[j].offset + tables[j].len <= len) { + // ignore any bogus entries in the table directory + ++j; + } + pos += 16; + } + nTables = j; + if (!parsedOk) { + return; + } + + // check for the head table; allow for a head-less OpenType CFF font + headlessCFF = gFalse; + if (seekTable("head") < 0) { + if (openTypeCFF && allowHeadlessCFF && seekTable("CFF ") >= 0) { + headlessCFF = gTrue; + nGlyphs = 0; + bbox[0] = bbox[1] = bbox[2] = bbox[3] = 0; + locaFmt = 0; + return; + } + parsedOk = gFalse; + return; + } + + // check for other tables that are required by both the TrueType + // spec and the Type 42 spec + if (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 && tables[i].len >= 4) { + pos = tables[i].offset + 2; + nCmaps = getU16BE(pos, &parsedOk); + pos += 2; + if (!parsedOk) { + return; + } + cmaps = (TrueTypeCmap *)gmallocn(nCmaps, sizeof(TrueTypeCmap)); + k = 0; + for (j = 0; j < nCmaps; ++j) { + cmaps[k].platform = getU16BE(pos, &parsedOk); + cmaps[k].encoding = getU16BE(pos + 2, &parsedOk); + cmaps[k].offset = getU32BE(pos + 4, &parsedOk); + pos += 8; + if (cmaps[k].offset >= tables[i].len) { + // skip any invalid subtables + continue; + } + cmaps[k].offset += tables[i].offset; + cmaps[k].fmt = getU16BE(cmaps[k].offset, &parsedOk); + cmaps[k].len = getU16BE(cmaps[k].offset + 2, &parsedOk); + ++k; + } + nCmaps = k; + if (!parsedOk) { + return; + } + } + + // 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) + // NB: out-of-bounds entries are handled in writeTTF() + if (!openTypeCFF) { + i = seekTable("loca"); + if (tables[i].len < (locaFmt ? 4 : 2)) { + parsedOk = gFalse; + return; + } + if (tables[i].len < (nGlyphs + 1) * (locaFmt ? 4 : 2)) { + nGlyphs = tables[i].len / (locaFmt ? 4 : 2) - 1; + } + if (!parsedOk) { + return; + } + } + + // read the post table + readPostTable(); +} + +// Get the table directory position +void FoFiTrueType::parseTTC(int fontNum, int *pos) { + int nFonts; + + isTTC = gTrue; + nFonts = getU32BE(8, &parsedOk); + if (!parsedOk) { + return; + } + if (fontNum < 0 || fontNum >= nFonts) { + parsedOk = gFalse; + return; + } + *pos = getU32BE(12 + 4 * fontNum, &parsedOk); +} + +void FoFiTrueType::parseDfont(int fontNum, int *offset, int *startPos) { + int resMapOffset, resDataOffset; + int resTypeListOffset, nTypes, typeTag; + int nFonts, refListOffset, dataOffset; + int pos, i; + + resDataOffset = getU32BE(0, &parsedOk); + resMapOffset = getU32BE(4, &parsedOk); + if (!parsedOk) { + return; + } + + resTypeListOffset = getU16BE(resMapOffset + 24, &parsedOk); + // resNameListOffset = getU16BE(resMapOffset + 26, &parsedOk); + nTypes = getU16BE(resMapOffset + 28, &parsedOk) + 1; + if (!parsedOk) { + return; + } + + pos = 0; // make gcc happy + for (i = 0; i < nTypes; ++i) { + pos = resMapOffset + resTypeListOffset + 2 + 8*i; + typeTag = getU32BE(pos, &parsedOk); + if (!parsedOk) { + return; + } + if (typeTag == 0x73666e74) { // 'sfnt' + break; + } + } + if (i >= nTypes) { + parsedOk = gFalse; + return; + } + nFonts = getU16BE(pos + 4, &parsedOk) + 1; + refListOffset = getU16BE(pos + 6, &parsedOk); + if (!parsedOk) { + return; + } + if (fontNum < 0 || fontNum >= nFonts) { + parsedOk = gFalse; + return; + } + pos = resMapOffset + resTypeListOffset + refListOffset + 12 * fontNum; + dataOffset = getU32BE(pos + 4, &parsedOk) & 0x00ffffff; + if (!parsedOk) { + return; + } + // the data offset points to a 4-byte length field, which we skip over + *offset = resDataOffset + dataOffset + 4; + *startPos = 0; +} + +void FoFiTrueType::readPostTable() { + GString *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 GHash(gTrue); + for (i = 0; i < 258; ++i) { + nameToGID->add(new GString(macGlyphNames[i]), i); + } + } else if (postFmt == 0x00020000) { + nameToGID = new GHash(gTrue); + n = getU16BE(tablePos + 32, &ok); + if (!ok) { + goto err; + } + stringIdx = 0; + stringPos = tablePos + 34 + 2*n; + for (i = 0; i < n && i < nGlyphs; ++i) { + ok = gTrue; + j = getU16BE(tablePos + 34 + 2*i, &ok); + if (j < 258) { + nameToGID->removeInt(macGlyphNames[j]); + nameToGID->add(new GString(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) { + continue; + } + } + m = getU8(stringPos, &ok); + if (!ok || !checkRegion(stringPos + 1, m)) { + continue; + } + name = new GString((char *)&file[stringPos + 1], m); + nameToGID->removeInt(name); + nameToGID->add(name, i); + ++stringIdx; + stringPos += 1 + m; + } + } + } else if (postFmt == 0x00028000) { + nameToGID = new GHash(gTrue); + for (i = 0; i < nGlyphs; ++i) { + j = getU8(tablePos + 32 + i, &ok); + if (!ok) { + continue; + } + if (j < 258) { + nameToGID->removeInt(macGlyphNames[j]); + nameToGID->add(new GString(macGlyphNames[j]), i); + } + } + } + + return; + + err: + if (nameToGID) { + delete nameToGID; + nameToGID = NULL; + } +} + +int FoFiTrueType::seekTable(const 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; +} -- cgit v1.2.3