| //======================================================================== |
| // |
| // FoFiTrueType.cc |
| // |
| // Copyright 1999-2003 Glyph & Cog, LLC |
| // |
| //======================================================================== |
| |
| //======================================================================== |
| // |
| // Modified under the Poppler project - http://poppler.freedesktop.org |
| // |
| // All changes made under the Poppler project to this file are licensed |
| // under GPL version 2 or later |
| // |
| // Copyright (C) 2006 Takashi Iwai <tiwai@suse.de> |
| // Copyright (C) 2007 Koji Otani <sho@bbr.jp> |
| // Copyright (C) 2007 Carlos Garcia Campos <carlosgc@gnome.org> |
| // Copyright (C) 2008, 2009, 2012, 2014-2022, 2024 Albert Astals Cid <aacid@kde.org> |
| // Copyright (C) 2008 Tomas Are Haavet <tomasare@gmail.com> |
| // Copyright (C) 2012 Suzuki Toshiya <mpsuzuki@hiroshima-u.ac.jp> |
| // Copyright (C) 2012, 2017 Adrian Johnson <ajohnson@redneon.com> |
| // Copyright (C) 2014 Thomas Freitag <Thomas.Freitag@alfa.de> |
| // Copyright (C) 2015 Aleksei Volkov <Aleksei Volkov> |
| // Copyright (C) 2015, 2016 William Bader <williambader@hotmail.com> |
| // Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de> |
| // Copyright (C) 2022 Zachary Travis <ztravis@everlaw.com> |
| // Copyright (C) 2022, 2024 Oliver Sander <oliver.sander@tu-dresden.de> |
| // Copyright (C) 2024 g10 Code GmbH, Author: Sune Stolborg Vuorela <sune@vuorela.dk> |
| // |
| // To see a description of the changes please see the Changelog file that |
| // came with your tarball or type make ChangeLog if you are building from git |
| // |
| //======================================================================== |
| |
| #include <config.h> |
| |
| #include <cstdlib> |
| #include <cstring> |
| #include <climits> |
| #include <algorithm> |
| #include <array> |
| #include "goo/GooLikely.h" |
| #include "goo/GooString.h" |
| #include "goo/GooCheckedOps.h" |
| #include "FoFiType1C.h" |
| #include "FoFiTrueType.h" |
| #include "poppler/Error.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 |
| { |
| unsigned int tag = 0; |
| unsigned int checksum = 0; |
| int offset = 0; |
| int origOffset = 0; |
| int len = 0; |
| }; |
| |
| struct TrueTypeCmap |
| { |
| int platform = 0; |
| int encoding = 0; |
| int offset = 0; |
| int len = 0; |
| int fmt = 0; |
| }; |
| |
| struct TrueTypeLoca |
| { |
| int idx = 0; |
| int origOffset = 0; |
| int newOffset = 0; |
| int len = 0; |
| }; |
| |
| #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 |
| |
| 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; } |
| }; |
| |
| //------------------------------------------------------------------------ |
| |
| struct T42Table |
| { |
| const char *tag; // 4-byte tag |
| bool 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 const T42Table t42Tables[nT42Tables] = { { "cvt ", true }, { "fpgm", true }, { "glyf", true }, { "head", true }, { "hhea", true }, { "hmtx", true }, |
| { "loca", true }, { "maxp", true }, { "prep", true }, { "vhea", false }, { "vmtx", false } }; |
| #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", |
| "mu", |
| "partialdiff", |
| "summation", |
| "product", |
| "pi", |
| "integral", |
| "ordfeminine", |
| "ordmasculine", |
| "Omega", |
| "ae", |
| "oslash", |
| "questiondown", |
| "exclamdown", |
| "logicalnot", |
| "radical", |
| "florin", |
| "approxequal", |
| "increment", |
| "guillemotleft", |
| "guillemotright", |
| "ellipsis", |
| "nbspace", |
| "Agrave", |
| "Atilde", |
| "Otilde", |
| "OE", |
| "oe", |
| "endash", |
| "emdash", |
| "quotedblleft", |
| "quotedblright", |
| "quoteleft", |
| "quoteright", |
| "divide", |
| "lozenge", |
| "ydieresis", |
| "Ydieresis", |
| "fraction", |
| "currency", |
| "guilsinglleft", |
| "guilsinglright", |
| "fi", |
| "fl", |
| "daggerdbl", |
| "periodcentered", |
| "quotesinglbase", |
| "quotedblbase", |
| "perthousand", |
| "Acircumflex", |
| "Ecircumflex", |
| "Aacute", |
| "Edieresis", |
| "Egrave", |
| "Iacute", |
| "Icircumflex", |
| "Idieresis", |
| "Igrave", |
| "Oacute", |
| "Ocircumflex", |
| "applelogo", |
| "Ograve", |
| "Uacute", |
| "Ucircumflex", |
| "Ugrave", |
| "dotlessi", |
| "circumflex", |
| "tilde", |
| "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 |
| //------------------------------------------------------------------------ |
| |
| std::unique_ptr<FoFiTrueType> FoFiTrueType::make(const unsigned char *fileA, int lenA, int faceIndexA) |
| { |
| // Cannot use std::make_unique, because the constructor is private |
| auto ff = new FoFiTrueType(fileA, lenA, false, faceIndexA); |
| if (!ff->parsedOk) { |
| delete ff; |
| return nullptr; |
| } |
| return std::unique_ptr<FoFiTrueType>(ff); |
| } |
| |
| std::unique_ptr<FoFiTrueType> FoFiTrueType::load(const char *fileName, int faceIndexA) |
| { |
| char *fileA; |
| int lenA; |
| |
| if (!(fileA = FoFiBase::readFile(fileName, &lenA))) { |
| return nullptr; |
| } |
| // Cannot use std::make_unique, because the constructor is private |
| auto ff = new FoFiTrueType((unsigned char *)fileA, lenA, true, faceIndexA); |
| if (!ff->parsedOk) { |
| delete ff; |
| return nullptr; |
| } |
| return std::unique_ptr<FoFiTrueType>(ff); |
| } |
| |
| FoFiTrueType::FoFiTrueType(const unsigned char *fileA, int lenA, bool freeFileDataA, int faceIndexA) : FoFiBase(fileA, lenA, freeFileDataA) |
| { |
| parsedOk = false; |
| faceIndex = faceIndexA; |
| gsubFeatureTable = 0; |
| gsubLookupList = 0; |
| |
| parse(); |
| } |
| |
| FoFiTrueType::~FoFiTrueType() = default; |
| |
| int FoFiTrueType::getNumCmaps() const |
| { |
| return cmaps.size(); |
| } |
| |
| int FoFiTrueType::getCmapPlatform(int i) const |
| { |
| return cmaps[i].platform; |
| } |
| |
| int FoFiTrueType::getCmapEncoding(int i) const |
| { |
| return cmaps[i].encoding; |
| } |
| |
| int FoFiTrueType::findCmap(int platform, int encoding) const |
| { |
| for (int i = 0; i < (int)cmaps.size(); ++i) { |
| if (cmaps[i].platform == platform && cmaps[i].encoding == encoding) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| int FoFiTrueType::mapCodeToGID(int i, unsigned int c) const |
| { |
| int gid; |
| unsigned int segCnt, segEnd, segStart, segDelta, segOffset; |
| unsigned int cmapFirst, cmapLen; |
| int pos, a, b, m; |
| unsigned int high, low, idx; |
| bool ok; |
| |
| if (i < 0 || i >= (int)cmaps.size()) { |
| return 0; |
| } |
| ok = true; |
| pos = cmaps[i].offset; |
| switch (cmaps[i].fmt) { |
| case 0: |
| if (c + 6 >= (unsigned int)cmaps[i].len) { |
| return 0; |
| } |
| gid = getU8(cmaps[i].offset + 6 + c, &ok); |
| break; |
| case 2: |
| high = c >> 8; |
| low = c & 0xFFU; |
| idx = getU16BE(pos + 6 + high * 2, &ok); |
| segStart = getU16BE(pos + 6 + 512 + idx, &ok); |
| segCnt = getU16BE(pos + 6 + 512 + idx + 2, &ok); |
| segDelta = getS16BE(pos + 6 + 512 + idx + 4, &ok); |
| segOffset = getU16BE(pos + 6 + 512 + idx + 6, &ok); |
| if (low < segStart || low >= segStart + segCnt) { |
| gid = 0; |
| } else { |
| int val = getU16BE(pos + 6 + 512 + idx + 6 + segOffset + (low - segStart) * 2, &ok); |
| gid = val == 0 ? 0 : (val + segDelta) & 0xFFFFU; |
| } |
| 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: |
| case 13: |
| 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; |
| } |
| // In format 12, the glyph codes increment through |
| // each segment; in format 13 the same glyph code is used |
| // for an entire segment. |
| gid = segDelta + (cmaps[i].fmt == 12 ? (c - segStart) : 0); |
| break; |
| default: |
| return 0; |
| } |
| if (!ok) { |
| return 0; |
| } |
| return gid; |
| } |
| |
| int FoFiTrueType::mapNameToGID(const char *name) const |
| { |
| const auto gid = nameToGID.find(name); |
| if (gid == nameToGID.end()) { |
| return 0; |
| } |
| return gid->second; |
| } |
| |
| bool FoFiTrueType::getCFFBlock(char **start, int *length) const |
| { |
| if (!openTypeCFF || tables.empty()) { |
| return false; |
| } |
| int i = seekTable("CFF "); |
| if (i < 0 || !checkRegion(tables[i].offset, tables[i].len)) { |
| return false; |
| } |
| *start = (char *)file + tables[i].offset; |
| *length = tables[i].len; |
| return true; |
| } |
| |
| int *FoFiTrueType::getCIDToGIDMap(int *nCIDs) const |
| { |
| char *start; |
| int length; |
| FoFiType1C *ff; |
| int *map; |
| |
| *nCIDs = 0; |
| if (!getCFFBlock(&start, &length)) { |
| return nullptr; |
| } |
| if (!(ff = FoFiType1C::make((unsigned char *)start, length))) { |
| return nullptr; |
| } |
| map = ff->getCIDToGIDMap(nCIDs); |
| delete ff; |
| return map; |
| } |
| |
| int FoFiTrueType::getEmbeddingRights() const |
| { |
| int i, fsType; |
| bool ok; |
| |
| if ((i = seekTable("OS/2")) < 0) { |
| return 4; |
| } |
| ok = true; |
| 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) const |
| { |
| char *start; |
| int length; |
| FoFiType1C *ff; |
| |
| if (!getCFFBlock(&start, &length)) { |
| return; |
| } |
| if (!(ff = FoFiType1C::make((unsigned char *)start, length))) { |
| return; |
| } |
| ff->getFontMatrix(mat); |
| delete ff; |
| } |
| |
| void FoFiTrueType::convertToType42(const char *psName, char **encoding, int *codeToGID, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| int maxUsedGlyph; |
| bool ok; |
| |
| if (openTypeCFF) { |
| return; |
| } |
| |
| // write the header |
| ok = true; |
| std::string buf = GooString::format("%!PS-TrueTypeFont-{0:2g}\n", (double)getS32BE(0, &ok) / 65536.0); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| |
| // 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.c_str(), buf.size()); |
| (*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, nullptr, false, &maxUsedGlyph); |
| |
| // end the dictionary and define the font |
| (*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40); |
| } |
| |
| void FoFiTrueType::convertToType1(const char *psName, const char **newEncoding, bool ascii, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| char *start; |
| int length; |
| FoFiType1C *ff; |
| |
| if (!getCFFBlock(&start, &length)) { |
| return; |
| } |
| if (!(ff = FoFiType1C::make((unsigned char *)start, length))) { |
| return; |
| } |
| ff->convertToType1(psName, newEncoding, ascii, outputFunc, outputStream); |
| delete ff; |
| } |
| |
| void FoFiTrueType::convertToCIDType2(const char *psName, const int *cidMap, int nCIDs, bool needVerticalMetrics, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| int cid, maxUsedGlyph; |
| bool ok; |
| int i, j, k; |
| |
| if (openTypeCFF) { |
| return; |
| } |
| |
| // write the header |
| ok = true; |
| std::string buf = GooString::format("%!PS-TrueTypeFont-{0:2g}\n", (double)getS32BE(0, &ok) / 65536.0); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| |
| // 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.c_str(), buf.size()); |
| 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.c_str(), buf.size()); |
| } |
| (*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.c_str(), buf.size()); |
| } |
| (*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.c_str(), buf.size()); |
| 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.c_str(), buf.size()); |
| buf = GooString::format(" 2 copy dup 2 mul exch {0:d} add -8 bitshift put\n", i); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| buf = GooString::format(" 1 index exch dup 2 mul 1 add exch {0:d} add" |
| " 255 and put\n", |
| i); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| (*outputFunc)(outputStream, " } for\n", 8); |
| } |
| (*outputFunc)(outputStream, "] def\n", 6); |
| } else { |
| buf = GooString::format("/CIDMap {0:d} string\n", 2 * nGlyphs); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| buf = GooString::format(" 0 1 {0:d} {{\n", nGlyphs - 1); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| (*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.c_str(), buf.size()); |
| (*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, nullptr, needVerticalMetrics, &maxUsedGlyph); |
| |
| // end the dictionary and define the font |
| (*outputFunc)(outputStream, "CIDFontName currentdict end /CIDFont defineresource pop\n", 56); |
| } |
| |
| void FoFiTrueType::convertToCIDType0(const char *psName, int *cidMap, int nCIDs, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| char *start; |
| int length; |
| FoFiType1C *ff; |
| |
| if (!getCFFBlock(&start, &length)) { |
| return; |
| } |
| if (!(ff = FoFiType1C::make((unsigned char *)start, length))) { |
| return; |
| } |
| ff->convertToCIDType0(psName, cidMap, nCIDs, outputFunc, outputStream); |
| delete ff; |
| } |
| |
| void FoFiTrueType::convertToType0(const char *psName, int *cidMap, int nCIDs, bool needVerticalMetrics, int *maxValidGlyph, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| GooString *sfntsName; |
| int maxUsedGlyph, n, i, j; |
| |
| *maxValidGlyph = -1; |
| |
| if (openTypeCFF) { |
| return; |
| } |
| |
| // write the Type 42 sfnts array |
| sfntsName = (new GooString(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.) |
| // Some fonts have a large nGlyphs but maxUsedGlyph of 0. |
| // These fonts might reference any glyph. |
| // Return the last written glyph number in maxValidGlyph. |
| // PSOutputDev::drawString() can use maxValidGlyph to avoid |
| // referencing zero-length glyphs that we trimmed. |
| // This allows pdftops to avoid writing huge files while still |
| // handling the rare PDF that uses a zero-length glyph. |
| if (cidMap) { |
| n = nCIDs; |
| } else if (nGlyphs > maxUsedGlyph + 256) { |
| if (maxUsedGlyph <= 255) { |
| n = 256; |
| } else { |
| n = maxUsedGlyph + 1; |
| } |
| } else { |
| n = nGlyphs; |
| } |
| *maxValidGlyph = n - 1; |
| for (i = 0; i < n; i += 256) { |
| (*outputFunc)(outputStream, "10 dict begin\n", 14); |
| (*outputFunc)(outputStream, "/FontName /", 11); |
| (*outputFunc)(outputStream, psName, strlen(psName)); |
| std::string buf = GooString::format("_{0:02x} def\n", i >> 8); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| (*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.c_str(), buf.size()); |
| (*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.c_str(), buf.size()); |
| } |
| (*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.c_str(), buf.size()); |
| } |
| (*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) { |
| const std::string buf = GooString::format("{0:d}\n", i >> 8); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| } |
| (*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)); |
| const std::string buf = GooString::format("_{0:02x} findfont\n", i >> 8); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| } |
| (*outputFunc)(outputStream, "] def\n", 6); |
| (*outputFunc)(outputStream, "FontName currentdict end definefont pop\n", 40); |
| } |
| |
| void FoFiTrueType::convertToType0(const char *psName, int *cidMap, int nCIDs, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| char *start; |
| int length; |
| FoFiType1C *ff; |
| |
| if (!getCFFBlock(&start, &length)) { |
| return; |
| } |
| if (!(ff = FoFiType1C::make((unsigned char *)start, length))) { |
| return; |
| } |
| ff->convertToType0(psName, cidMap, nCIDs, outputFunc, outputStream); |
| delete ff; |
| } |
| |
| void FoFiTrueType::cvtEncoding(char **encoding, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| const char *name; |
| int i; |
| |
| (*outputFunc)(outputStream, "/Encoding 256 array\n", 20); |
| if (encoding) { |
| for (i = 0; i < 256; ++i) { |
| if (!(name = encoding[i])) { |
| name = ".notdef"; |
| } |
| const std::string buf = GooString::format("dup {0:d} /", i); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| (*outputFunc)(outputStream, name, strlen(name)); |
| (*outputFunc)(outputStream, " put\n", 5); |
| } |
| } else { |
| for (i = 0; i < 256; ++i) { |
| const std::string buf = GooString::format("dup {0:d} /c{1:02x} put\n", i, i); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| } |
| } |
| (*outputFunc)(outputStream, "readonly def\n", 13); |
| } |
| |
| void FoFiTrueType::cvtCharStrings(char **encoding, const int *codeToGID, FoFiOutputFunc outputFunc, void *outputStream) const |
| { |
| const char *name; |
| 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 (cmaps.empty()) { |
| 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)); |
| const std::string buf = GooString::format(" {0:d} def\n", k); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| } |
| } |
| } |
| |
| err: |
| (*outputFunc)(outputStream, "end readonly def\n", 17); |
| } |
| |
| void FoFiTrueType::cvtSfnts(FoFiOutputFunc outputFunc, void *outputStream, const GooString *name, bool needVerticalMetrics, int *maxUsedGlyph) const |
| { |
| std::array<unsigned char, 54> headData; |
| std::vector<unsigned char> locaData; |
| TrueTypeTable newTables[nT42Tables]; |
| unsigned char tableDir[12 + nT42Tables * 16]; |
| bool ok; |
| unsigned int checksum; |
| int nNewTables; |
| int glyfTableLen, length, glyfPos, j, k; |
| std::array<unsigned char, 36> vheaTab = { |
| 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 |
| }; |
| std::vector<unsigned char> vmtxTab; |
| bool needVhea, needVmtx; |
| int advance; |
| |
| *maxUsedGlyph = -1; |
| |
| // construct the 'head' table, zero out the font checksum |
| int i = seekTable("head"); |
| if (i < 0 || i >= (int)tables.size()) { |
| return; |
| } |
| int pos = tables[i].offset; |
| if (!checkRegion(pos, 54)) { |
| return; |
| } |
| memcpy(headData.data(), file + pos, 54); |
| headData[8] = headData[9] = headData[10] = headData[11] = (unsigned char)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) |
| std::vector<TrueTypeLoca> locaTable { size_t(nGlyphs + 1) }; |
| i = seekTable("loca"); |
| pos = tables[i].offset; |
| i = seekTable("glyf"); |
| glyfTableLen = tables[i].len; |
| ok = true; |
| 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 > glyfTableLen) { |
| locaTable[i].origOffset = glyfTableLen; |
| } |
| } |
| std::sort(locaTable.begin(), locaTable.end(), cmpTrueTypeLocaOffsetFunctor()); |
| for (i = 0; i < nGlyphs; ++i) { |
| locaTable[i].len = locaTable[i + 1].origOffset - locaTable[i].origOffset; |
| } |
| locaTable[nGlyphs].len = 0; |
| std::sort(locaTable.begin(), locaTable.end(), cmpTrueTypeLocaIdxFunctor()); |
| pos = 0; |
| for (i = 0; i <= nGlyphs; ++i) { |
| locaTable[i].newOffset = pos; |
| |
| int newPos; |
| if (unlikely(checkedAdd(pos, locaTable[i].len, &newPos))) { |
| ok = false; |
| } else { |
| pos = newPos; |
| if (pos & 3) { |
| pos += 4 - (pos & 3); |
| } |
| } |
| if (locaTable[i].len > 0) { |
| *maxUsedGlyph = i; |
| } |
| } |
| |
| // construct the new 'loca' table |
| locaData.resize((nGlyphs + 1) * (locaFmt ? 4 : 2)); |
| for (i = 0; i <= nGlyphs; ++i) { |
| pos = locaTable[i].newOffset; |
| if (locaFmt) { |
| locaData[4 * i] = (unsigned char)(pos >> 24); |
| locaData[4 * i + 1] = (unsigned char)(pos >> 16); |
| locaData[4 * i + 2] = (unsigned char)(pos >> 8); |
| locaData[4 * i + 3] = (unsigned char)pos; |
| } else { |
| locaData[2 * i] = (unsigned char)(pos >> 9); |
| locaData[2 * i + 1] = (unsigned char)(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; |
| } |
| } |
| 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); |
| } else if (i == t42LocaTable) { |
| length = (nGlyphs + 1) * (locaFmt ? 4 : 2); |
| checksum = computeTableChecksum(locaData); |
| } 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(std::span(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(std::span(file + tables[j].offset, length)); |
| } |
| } else if (needVerticalMetrics && i == t42VheaTable) { |
| vheaTab[10] = advance / 256; // max advance height |
| vheaTab[11] = advance % 256; |
| length = vheaTab.size(); |
| checksum = computeTableChecksum(vheaTab); |
| } else if (needVerticalMetrics && i == t42VmtxTable) { |
| length = 4 + (nGlyphs - 1) * 2; |
| vmtxTab.resize(length, 0); |
| vmtxTab[0] = advance / 256; |
| vmtxTab[1] = advance % 256; |
| checksum = computeTableChecksum(vmtxTab); |
| } 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; |
| int newPos; |
| if (unlikely(checkedAdd(pos, length, &newPos))) { |
| ok = false; |
| } else { |
| pos = newPos; |
| if (pos & 3) { |
| pos += 4 - (length & 3); |
| } |
| } |
| ++k; |
| } |
| } |
| if (unlikely(k < nNewTables)) { |
| error(errSyntaxWarning, -1, "unexpected number of tables"); |
| nNewTables = 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] = (unsigned char)128; |
| tableDir[8] = 0; // entrySelector |
| tableDir[9] = 3; |
| tableDir[10] = 0; // rangeShift |
| tableDir[11] = (unsigned char)(16 * nNewTables - 128); |
| pos = 12; |
| for (i = 0; i < nNewTables; ++i) { |
| tableDir[pos] = (unsigned char)(newTables[i].tag >> 24); |
| tableDir[pos + 1] = (unsigned char)(newTables[i].tag >> 16); |
| tableDir[pos + 2] = (unsigned char)(newTables[i].tag >> 8); |
| tableDir[pos + 3] = (unsigned char)newTables[i].tag; |
| tableDir[pos + 4] = (unsigned char)(newTables[i].checksum >> 24); |
| tableDir[pos + 5] = (unsigned char)(newTables[i].checksum >> 16); |
| tableDir[pos + 6] = (unsigned char)(newTables[i].checksum >> 8); |
| tableDir[pos + 7] = (unsigned char)newTables[i].checksum; |
| tableDir[pos + 8] = (unsigned char)(newTables[i].offset >> 24); |
| tableDir[pos + 9] = (unsigned char)(newTables[i].offset >> 16); |
| tableDir[pos + 10] = (unsigned char)(newTables[i].offset >> 8); |
| tableDir[pos + 11] = (unsigned char)newTables[i].offset; |
| tableDir[pos + 12] = (unsigned char)(newTables[i].len >> 24); |
| tableDir[pos + 13] = (unsigned char)(newTables[i].len >> 16); |
| tableDir[pos + 14] = (unsigned char)(newTables[i].len >> 8); |
| tableDir[pos + 15] = (unsigned char)newTables[i].len; |
| pos += 16; |
| } |
| |
| // compute the font checksum and store it in the head table |
| checksum = computeTableChecksum(std::span(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] = (unsigned char)(checksum >> 24); |
| headData[9] = (unsigned char)(checksum >> 16); |
| headData[10] = (unsigned char)(checksum >> 8); |
| headData[11] = (unsigned char)checksum; |
| |
| // start the sfnts array |
| if (name) { |
| (*outputFunc)(outputStream, "/", 1); |
| (*outputFunc)(outputStream, name->c_str(), name->getLength()); |
| (*outputFunc)(outputStream, " [\n", 3); |
| } else { |
| (*outputFunc)(outputStream, "/sfnts [\n", 9); |
| } |
| |
| // write the table directory |
| dumpString(std::span(tableDir, 12 + nNewTables * 16), outputFunc, outputStream); |
| |
| // write the tables |
| for (i = 0; i < nNewTables; ++i) { |
| if (i == t42HeadTable) { |
| dumpString(headData, outputFunc, outputStream); |
| } else if (i == t42LocaTable) { |
| length = (nGlyphs + 1) * (locaFmt ? 4 : 2); |
| dumpString(locaData, 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(std::span(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(std::span(file + tables[j].offset, tables[j].len), outputFunc, outputStream); |
| } else if (needVerticalMetrics && i == t42VheaTable) { |
| if (unlikely(length > (int)sizeof(vheaTab))) { |
| error(errSyntaxWarning, -1, "length bigger than vheaTab size"); |
| length = sizeof(vheaTab); |
| } |
| dumpString(vheaTab, outputFunc, outputStream); |
| } else if (needVerticalMetrics && i == t42VmtxTable) { |
| if (unlikely(length > (int)vmtxTab.size())) { |
| error(errSyntaxWarning, -1, "length bigger than vmtxTab size"); |
| } |
| dumpString(vmtxTab, outputFunc, outputStream); |
| } |
| } |
| } |
| } |
| |
| // end the sfnts array |
| (*outputFunc)(outputStream, "] def\n", 6); |
| } |
| |
| void FoFiTrueType::dumpString(std::span<const unsigned char> s, FoFiOutputFunc outputFunc, void *outputStream) |
| { |
| (*outputFunc)(outputStream, "<", 1); |
| for (int i = 0; i < (int)s.size(); i += 32) { |
| for (int j = 0; j < 32 && i + j < (int)s.size(); ++j) { |
| const std::string buf = GooString::format("{0:02x}", s[i + j] & 0xff); |
| (*outputFunc)(outputStream, buf.c_str(), buf.size()); |
| } |
| if (i % (65536 - 32) == 65536 - 64) { |
| (*outputFunc)(outputStream, ">\n<", 3); |
| } else if (i + 32 < (int)s.size()) { |
| (*outputFunc)(outputStream, "\n", 1); |
| } |
| } |
| if (s.size() & 3) { |
| int pad = 4 - (s.size() & 3); |
| for (int 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); |
| } |
| |
| unsigned int FoFiTrueType::computeTableChecksum(std::span<const unsigned char> data) |
| { |
| unsigned checksum = 0; |
| for (size_t i = 0; i + 3 < data.size(); i += 4) { |
| unsigned int word = ((data[i] & 0xff) << 24) + ((data[i + 1] & 0xff) << 16) + ((data[i + 2] & 0xff) << 8) + (data[i + 3] & 0xff); |
| checksum += word; |
| } |
| if (data.size() & 3) { |
| unsigned int word = 0; |
| int i = data.size() & ~3; |
| switch (data.size() & 3) { |
| case 3: |
| word |= (data[i + 2] & 0xff) << 8; |
| // fallthrough |
| case 2: |
| word |= (data[i + 1] & 0xff) << 16; |
| // fallthrough |
| case 1: |
| word |= (data[i] & 0xff) << 24; |
| break; |
| } |
| checksum += word; |
| } |
| return checksum; |
| } |
| |
| void FoFiTrueType::parse() |
| { |
| unsigned int topTag; |
| int pos, ver, i, j; |
| |
| parsedOk = true; |
| |
| // 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 = false; |
| 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 |
| int nTables = getU16BE(pos + 4, &parsedOk); |
| if (!parsedOk) { |
| return; |
| } |
| tables.resize(nTables); |
| pos += 12; |
| j = 0; |
| for (i = 0; i < nTables; ++i) { |
| tables[j].tag = getU32BE(pos, &parsedOk); |
| tables[j].checksum = getU32BE(pos + 4, &parsedOk); |
| tables[j].offset = (int)getU32BE(pos + 8, &parsedOk); |
| tables[j].len = (int)getU32BE(pos + 12, &parsedOk); |
| if (unlikely((tables[j].offset < 0) || (tables[j].len < 0) || (tables[j].offset < INT_MAX - tables[j].len) || (tables[j].len > INT_MAX - tables[j].offset) |
| || (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; |
| } |
| if (nTables != j) { |
| nTables = j; |
| tables.resize(nTables); |
| } |
| if (!parsedOk || tables.empty()) { |
| parsedOk = false; |
| 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 || (!openTypeCFF && seekTable("loca") < 0) || (!openTypeCFF && seekTable("glyf") < 0) || (openTypeCFF && (seekTable("CFF ") < 0 && seekTable("CFF2") < 0))) { |
| parsedOk = false; |
| return; |
| } |
| |
| // read the cmaps |
| if ((i = seekTable("cmap")) >= 0) { |
| pos = tables[i].offset + 2; |
| int nCmaps = getU16BE(pos, &parsedOk); |
| pos += 2; |
| if (!parsedOk) { |
| return; |
| } |
| cmaps.resize(nCmaps); |
| 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) { |
| cmaps.clear(); |
| return; |
| } |
| } else { |
| cmaps.clear(); |
| } |
| |
| // 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; |
| } |
| |
| // read the post table |
| readPostTable(); |
| } |
| |
| void FoFiTrueType::readPostTable() |
| { |
| std::string name; |
| int tablePos, postFmt, stringIdx, stringPos; |
| bool ok; |
| int i, j, n, m; |
| |
| ok = true; |
| if ((i = seekTable("post")) < 0) { |
| return; |
| } |
| tablePos = tables[i].offset; |
| postFmt = getU32BE(tablePos, &ok); |
| if (!ok) { |
| goto err; |
| } |
| if (postFmt == 0x00010000) { |
| nameToGID.reserve(258); |
| for (i = 0; i < 258; ++i) { |
| nameToGID.emplace(macGlyphNames[i], i); |
| } |
| } else if (postFmt == 0x00020000) { |
| nameToGID.reserve(258); |
| 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) { |
| ok = true; |
| j = getU16BE(tablePos + 34 + 2 * i, &ok); |
| if (j < 258) { |
| nameToGID[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.assign((char *)&file[stringPos + 1], m); |
| nameToGID[name] = i; |
| ++stringIdx; |
| stringPos += 1 + m; |
| } |
| } |
| } else if (postFmt == 0x00028000) { |
| nameToGID.reserve(258); |
| for (i = 0; i < nGlyphs; ++i) { |
| j = getU8(tablePos + 32 + i, &ok); |
| if (!ok) { |
| continue; |
| } |
| if (j < 258) { |
| nameToGID[macGlyphNames[j]] = i; |
| } |
| } |
| } |
| |
| return; |
| |
| err: |
| nameToGID.clear(); |
| } |
| |
| int FoFiTrueType::seekTable(const char *tag) const |
| { |
| unsigned int tagI; |
| |
| tagI = ((tag[0] & 0xff) << 24) | ((tag[1] & 0xff) << 16) | ((tag[2] & 0xff) << 8) | (tag[3] & 0xff); |
| for (int i = 0; i < (int)tables.size(); ++i) { |
| if (tables[i].tag == tagI) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| unsigned int FoFiTrueType::charToTag(const char *tagName) |
| { |
| int n = strlen(tagName); |
| unsigned int 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 *scriptName) |
| { |
| return setupGSUB(scriptName, nullptr); |
| } |
| |
| /* |
| setup GSUB table data |
| Only supporting vertical text substitution. |
| */ |
| int FoFiTrueType::setupGSUB(const char *scriptName, const char *languageName) |
| { |
| unsigned int gsubTable; |
| unsigned int i; |
| unsigned int scriptList, featureList; |
| unsigned int scriptCount; |
| unsigned int tag; |
| unsigned int scriptTable = 0; |
| unsigned int langSys; |
| unsigned int featureCount; |
| unsigned int featureIndex; |
| unsigned int ftable = 0; |
| unsigned int llist; |
| unsigned int scriptTag; |
| int x; |
| unsigned int pos; |
| |
| if (scriptName == nullptr) { |
| gsubFeatureTable = 0; |
| return 0; |
| } |
| scriptTag = charToTag(scriptName); |
| /* 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 = 0; |
| if (languageName) { |
| unsigned int langTag = charToTag(languageName); |
| unsigned int langCount = getU16BE(pos + 2, &parsedOk); |
| for (i = 0; i < langCount && langSys == 0; i++) { |
| tag = getU32BE(pos + 4 + i * (4 + 2), &parsedOk); |
| if (tag == langTag) { |
| langSys = getU16BE(pos + 4 + i * (4 + 2) + 4, &parsedOk); |
| } |
| } |
| } |
| if (langSys == 0) { |
| /* default language system */ |
| langSys = getU16BE(pos, &parsedOk); |
| } |
| |
| /* read LangSys table */ |
| if (langSys == 0) { |
| /* no default LangSys */ |
| return 0; |
| } |
| |
| pos = gsubTable + scriptList + scriptTable + langSys + 2; |
| featureIndex = getU16BE(pos, &parsedOk); /* ReqFeatureIndex */ |
| pos += 2; |
| |
| if (featureIndex != 0xffff) { |
| unsigned int 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++) { |
| unsigned int 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; |
| } |
| |
| unsigned int FoFiTrueType::doMapToVertGID(unsigned int orgGID) |
| { |
| unsigned int lookupCount; |
| unsigned int lookupListIndex; |
| unsigned int i; |
| unsigned int gid = 0; |
| unsigned int 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; |
| } |
| |
| unsigned int FoFiTrueType::mapToVertGID(unsigned int orgGID) |
| { |
| unsigned int mapped; |
| |
| if (gsubFeatureTable == 0) { |
| return orgGID; |
| } |
| if ((mapped = doMapToVertGID(orgGID)) != 0) { |
| return mapped; |
| } |
| return orgGID; |
| } |
| |
| unsigned int FoFiTrueType::scanLookupList(unsigned int listIndex, unsigned int orgGID) |
| { |
| unsigned int lookupTable; |
| unsigned int subTableCount; |
| unsigned int subTable; |
| unsigned int i; |
| unsigned int gid = 0; |
| unsigned int 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; |
| } |
| |
| unsigned int FoFiTrueType::scanLookupSubTable(unsigned int subTable, unsigned int orgGID) |
| { |
| unsigned int format; |
| unsigned int coverage; |
| int delta; |
| int glyphCount; |
| unsigned int substitute; |
| unsigned int 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(unsigned int coverage, unsigned int orgGID) |
| { |
| int index = -1; |
| unsigned int format; |
| unsigned int count; |
| unsigned int i; |
| unsigned int pos; |
| |
| pos = coverage; |
| format = getU16BE(pos, &parsedOk); |
| pos += 2; |
| switch (format) { |
| case 1: |
| count = getU16BE(pos, &parsedOk); |
| pos += 2; |
| // In some poor CJK fonts, key GIDs are not sorted, |
| // thus we cannot finish checking even when the range |
| // including orgGID seems to have already passed. |
| for (i = 0; i < count; i++) { |
| unsigned int gid; |
| |
| gid = getU16BE(pos, &parsedOk); |
| pos += 2; |
| if (gid == orgGID) { |
| /* found */ |
| index = i; |
| break; |
| } |
| } |
| break; |
| case 2: |
| count = getU16BE(pos, &parsedOk); |
| pos += 2; |
| for (i = 0; i < count; i++) { |
| unsigned int startGID, endGID; |
| unsigned int startIndex; |
| |
| startGID = getU16BE(pos, &parsedOk); |
| pos += 2; |
| endGID = getU16BE(pos, &parsedOk); |
| pos += 2; |
| startIndex = getU16BE(pos, &parsedOk); |
| pos += 2; |
| // In some poor CJK fonts, key GIDs are not sorted, |
| // thus we cannot finish checking even when the range |
| // including orgGID seems to have already passed. |
| if (startGID <= orgGID && orgGID <= endGID) { |
| /* found */ |
| index = startIndex + orgGID - startGID; |
| break; |
| } |
| } |
| break; |
| default: |
| break; |
| } |
| return index; |
| } |
