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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc')
-rw-r--r--Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc2303
1 files changed, 2303 insertions, 0 deletions
diff --git a/Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc b/Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc
new file mode 100644
index 00000000000..f224ff75b5f
--- /dev/null
+++ b/Build/source/libs/xpdf/xpdf-src/xpdf/GfxFont.cc
@@ -0,0 +1,2303 @@
+//========================================================================
+//
+// GfxFont.cc
+//
+// Copyright 1996-2003 Glyph & Cog, LLC
+//
+//========================================================================
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+#include <limits.h>
+#include "gmem.h"
+#include "gmempp.h"
+#include "GList.h"
+#include "GHash.h"
+#include "Error.h"
+#include "Object.h"
+#include "Dict.h"
+#include "GlobalParams.h"
+#include "CMap.h"
+#include "CharCodeToUnicode.h"
+#include "FontEncodingTables.h"
+#include "BuiltinFontTables.h"
+#include "FoFiIdentifier.h"
+#include "FoFiType1.h"
+#include "FoFiType1C.h"
+#include "FoFiTrueType.h"
+#include "GfxFont.h"
+
+//------------------------------------------------------------------------
+
+struct Base14FontMapEntry {
+ const char *altName;
+ const char *base14Name;
+};
+
+static Base14FontMapEntry base14FontMap[] = {
+ { "Arial", "Helvetica" },
+ { "Arial,Bold", "Helvetica-Bold" },
+ { "Arial,BoldItalic", "Helvetica-BoldOblique" },
+ { "Arial,Italic", "Helvetica-Oblique" },
+ { "Arial-Bold", "Helvetica-Bold" },
+ { "Arial-BoldItalic", "Helvetica-BoldOblique" },
+ { "Arial-BoldItalicMT", "Helvetica-BoldOblique" },
+ { "Arial-BoldMT", "Helvetica-Bold" },
+ { "Arial-Italic", "Helvetica-Oblique" },
+ { "Arial-ItalicMT", "Helvetica-Oblique" },
+ { "ArialMT", "Helvetica" },
+ { "Courier", "Courier" },
+ { "Courier,Bold", "Courier-Bold" },
+ { "Courier,BoldItalic", "Courier-BoldOblique" },
+ { "Courier,Italic", "Courier-Oblique" },
+ { "Courier-Bold", "Courier-Bold" },
+ { "Courier-BoldOblique", "Courier-BoldOblique" },
+ { "Courier-Oblique", "Courier-Oblique" },
+ { "CourierNew", "Courier" },
+ { "CourierNew,Bold", "Courier-Bold" },
+ { "CourierNew,BoldItalic", "Courier-BoldOblique" },
+ { "CourierNew,Italic", "Courier-Oblique" },
+ { "CourierNew-Bold", "Courier-Bold" },
+ { "CourierNew-BoldItalic", "Courier-BoldOblique" },
+ { "CourierNew-Italic", "Courier-Oblique" },
+ { "CourierNewPS-BoldItalicMT", "Courier-BoldOblique" },
+ { "CourierNewPS-BoldMT", "Courier-Bold" },
+ { "CourierNewPS-ItalicMT", "Courier-Oblique" },
+ { "CourierNewPSMT", "Courier" },
+ { "Helvetica", "Helvetica" },
+ { "Helvetica,Bold", "Helvetica-Bold" },
+ { "Helvetica,BoldItalic", "Helvetica-BoldOblique" },
+ { "Helvetica,Italic", "Helvetica-Oblique" },
+ { "Helvetica-Bold", "Helvetica-Bold" },
+ { "Helvetica-BoldItalic", "Helvetica-BoldOblique" },
+ { "Helvetica-BoldOblique", "Helvetica-BoldOblique" },
+ { "Helvetica-Italic", "Helvetica-Oblique" },
+ { "Helvetica-Oblique", "Helvetica-Oblique" },
+ { "Symbol", "Symbol" },
+ { "Symbol,Bold", "Symbol" },
+ { "Symbol,BoldItalic", "Symbol" },
+ { "Symbol,Italic", "Symbol" },
+ { "Times-Bold", "Times-Bold" },
+ { "Times-BoldItalic", "Times-BoldItalic" },
+ { "Times-Italic", "Times-Italic" },
+ { "Times-Roman", "Times-Roman" },
+ { "TimesNewRoman", "Times-Roman" },
+ { "TimesNewRoman,Bold", "Times-Bold" },
+ { "TimesNewRoman,BoldItalic", "Times-BoldItalic" },
+ { "TimesNewRoman,Italic", "Times-Italic" },
+ { "TimesNewRoman-Bold", "Times-Bold" },
+ { "TimesNewRoman-BoldItalic", "Times-BoldItalic" },
+ { "TimesNewRoman-Italic", "Times-Italic" },
+ { "TimesNewRomanPS", "Times-Roman" },
+ { "TimesNewRomanPS-Bold", "Times-Bold" },
+ { "TimesNewRomanPS-BoldItalic", "Times-BoldItalic" },
+ { "TimesNewRomanPS-BoldItalicMT", "Times-BoldItalic" },
+ { "TimesNewRomanPS-BoldMT", "Times-Bold" },
+ { "TimesNewRomanPS-Italic", "Times-Italic" },
+ { "TimesNewRomanPS-ItalicMT", "Times-Italic" },
+ { "TimesNewRomanPSMT", "Times-Roman" },
+ { "TimesNewRomanPSMT,Bold", "Times-Bold" },
+ { "TimesNewRomanPSMT,BoldItalic", "Times-BoldItalic" },
+ { "TimesNewRomanPSMT,Italic", "Times-Italic" },
+ { "ZapfDingbats", "ZapfDingbats" }
+};
+
+//------------------------------------------------------------------------
+
+// index: {fixed:0, sans-serif:4, serif:8} + bold*2 + italic
+// NB: must be in same order as psSubstFonts in PSOutputDev.cc
+static const char *base14SubstFonts[14] = {
+ "Courier",
+ "Courier-Oblique",
+ "Courier-Bold",
+ "Courier-BoldOblique",
+ "Helvetica",
+ "Helvetica-Oblique",
+ "Helvetica-Bold",
+ "Helvetica-BoldOblique",
+ "Times-Roman",
+ "Times-Italic",
+ "Times-Bold",
+ "Times-BoldItalic",
+ // the last two are never used for substitution
+ "Symbol",
+ "ZapfDingbats"
+};
+
+//------------------------------------------------------------------------
+
+static int readFromStream(void *data) {
+ return ((Stream *)data)->getChar();
+}
+
+//------------------------------------------------------------------------
+// GfxFontLoc
+//------------------------------------------------------------------------
+
+GfxFontLoc::GfxFontLoc() {
+ path = NULL;
+ fontNum = 0;
+ oblique = 0;
+ encoding = NULL;
+ substIdx = -1;
+}
+
+GfxFontLoc::~GfxFontLoc() {
+ if (path) {
+ delete path;
+ }
+ if (encoding) {
+ delete encoding;
+ }
+}
+
+//------------------------------------------------------------------------
+// GfxFont
+//------------------------------------------------------------------------
+
+GfxFont *GfxFont::makeFont(XRef *xref, const char *tagA,
+ Ref idA, Dict *fontDict) {
+ GString *nameA;
+ Ref embFontIDA;
+ GfxFontType typeA;
+ GfxFont *font;
+ Object obj1;
+
+ // get base font name
+ nameA = NULL;
+ fontDict->lookup("BaseFont", &obj1);
+ if (obj1.isName()) {
+ nameA = new GString(obj1.getName());
+ } else if (obj1.isString()) {
+ nameA = obj1.getString()->copy();
+ }
+ obj1.free();
+
+ // get embedded font ID and font type
+ typeA = getFontType(xref, fontDict, &embFontIDA);
+
+ // create the font object
+ font = NULL;
+ if (typeA < fontCIDType0) {
+ font = new Gfx8BitFont(xref, tagA, idA, nameA, typeA, embFontIDA,
+ fontDict);
+ } else {
+ font = new GfxCIDFont(xref, tagA, idA, nameA, typeA, embFontIDA,
+ fontDict);
+ }
+
+ return font;
+}
+
+GfxFont::GfxFont(const char *tagA, Ref idA, GString *nameA,
+ GfxFontType typeA, Ref embFontIDA) {
+ ok = gFalse;
+ tag = new GString(tagA);
+ id = idA;
+ name = nameA;
+ type = typeA;
+ embFontID = embFontIDA;
+ embFontName = NULL;
+ hasToUnicode = gFalse;
+}
+
+GfxFont::~GfxFont() {
+ delete tag;
+ if (name) {
+ delete name;
+ }
+ if (embFontName) {
+ delete embFontName;
+ }
+}
+
+// This function extracts three pieces of information:
+// 1. the "expected" font type, i.e., the font type implied by
+// Font.Subtype, DescendantFont.Subtype, and
+// FontDescriptor.FontFile3.Subtype
+// 2. the embedded font object ID
+// 3. the actual font type - determined by examining the embedded font
+// if there is one, otherwise equal to the expected font type
+// If the expected and actual font types don't match, a warning
+// message is printed. The expected font type is not used for
+// anything else.
+GfxFontType GfxFont::getFontType(XRef *xref, Dict *fontDict, Ref *embID) {
+ GfxFontType t, expectedType;
+ FoFiIdentifierType fft;
+ Dict *fontDict2;
+ Object subtype, fontDesc, obj1, obj2, obj3, obj4;
+ GBool isType0, err;
+
+ t = fontUnknownType;
+ embID->num = embID->gen = -1;
+ err = gFalse;
+
+ fontDict->lookup("Subtype", &subtype);
+ expectedType = fontUnknownType;
+ isType0 = gFalse;
+ if (subtype.isName("Type1") || subtype.isName("MMType1")) {
+ expectedType = fontType1;
+ } else if (subtype.isName("Type1C")) {
+ expectedType = fontType1C;
+ } else if (subtype.isName("Type3")) {
+ expectedType = fontType3;
+ } else if (subtype.isName("TrueType")) {
+ expectedType = fontTrueType;
+ } else if (subtype.isName("Type0")) {
+ isType0 = gTrue;
+ } else {
+ error(errSyntaxWarning, -1, "Unknown font type: '{0:s}'",
+ subtype.isName() ? subtype.getName() : "???");
+ }
+ subtype.free();
+
+ fontDict2 = fontDict;
+ if (fontDict->lookup("DescendantFonts", &obj1)->isArray()) {
+ if (obj1.arrayGetLength() == 0) {
+ error(errSyntaxWarning, -1, "Empty DescendantFonts array in font");
+ obj2.initNull();
+ } else if (obj1.arrayGet(0, &obj2)->isDict()) {
+ if (!isType0) {
+ error(errSyntaxWarning, -1, "Non-CID font with DescendantFonts array");
+ }
+ fontDict2 = obj2.getDict();
+ fontDict2->lookup("Subtype", &subtype);
+ if (subtype.isName("CIDFontType0")) {
+ if (isType0) {
+ expectedType = fontCIDType0;
+ }
+ } else if (subtype.isName("CIDFontType2")) {
+ if (isType0) {
+ expectedType = fontCIDType2;
+ }
+ }
+ subtype.free();
+ }
+ } else {
+ obj2.initNull();
+ }
+
+ if (fontDict2->lookup("FontDescriptor", &fontDesc)->isDict()) {
+ if (fontDesc.dictLookupNF("FontFile", &obj3)->isRef()) {
+ *embID = obj3.getRef();
+ if (expectedType != fontType1) {
+ err = gTrue;
+ }
+ }
+ obj3.free();
+ if (embID->num == -1 &&
+ fontDesc.dictLookupNF("FontFile2", &obj3)->isRef()) {
+ *embID = obj3.getRef();
+ if (isType0) {
+ expectedType = fontCIDType2;
+ } else if (expectedType != fontTrueType) {
+ err = gTrue;
+ }
+ }
+ obj3.free();
+ if (embID->num == -1 &&
+ fontDesc.dictLookupNF("FontFile3", &obj3)->isRef()) {
+ *embID = obj3.getRef();
+ if (obj3.fetch(xref, &obj4)->isStream()) {
+ obj4.streamGetDict()->lookup("Subtype", &subtype);
+ if (subtype.isName("Type1")) {
+ if (expectedType != fontType1) {
+ err = gTrue;
+ expectedType = isType0 ? fontCIDType0 : fontType1;
+ }
+ } else if (subtype.isName("Type1C")) {
+ if (expectedType == fontType1) {
+ expectedType = fontType1C;
+ } else if (expectedType != fontType1C) {
+ err = gTrue;
+ expectedType = isType0 ? fontCIDType0C : fontType1C;
+ }
+ } else if (subtype.isName("TrueType")) {
+ if (expectedType != fontTrueType) {
+ err = gTrue;
+ expectedType = isType0 ? fontCIDType2 : fontTrueType;
+ }
+ } else if (subtype.isName("CIDFontType0C")) {
+ if (expectedType == fontCIDType0) {
+ expectedType = fontCIDType0C;
+ } else {
+ err = gTrue;
+ expectedType = isType0 ? fontCIDType0C : fontType1C;
+ }
+ } else if (subtype.isName("OpenType")) {
+ if (expectedType == fontTrueType) {
+ expectedType = fontTrueTypeOT;
+ } else if (expectedType == fontType1) {
+ expectedType = fontType1COT;
+ } else if (expectedType == fontCIDType0) {
+ expectedType = fontCIDType0COT;
+ } else if (expectedType == fontCIDType2) {
+ expectedType = fontCIDType2OT;
+ } else {
+ err = gTrue;
+ }
+ } else {
+ error(errSyntaxError, -1, "Unknown font type '{0:s}'",
+ subtype.isName() ? subtype.getName() : "???");
+ }
+ subtype.free();
+ }
+ obj4.free();
+ }
+ obj3.free();
+ }
+ fontDesc.free();
+
+ t = fontUnknownType;
+ if (embID->num >= 0) {
+ obj3.initRef(embID->num, embID->gen);
+ obj3.fetch(xref, &obj4);
+ if (obj4.isStream()) {
+ obj4.streamReset();
+ fft = FoFiIdentifier::identifyStream(&readFromStream, obj4.getStream());
+ obj4.streamClose();
+ switch (fft) {
+ case fofiIdType1PFA:
+ case fofiIdType1PFB:
+ t = fontType1;
+ break;
+ case fofiIdCFF8Bit:
+ t = isType0 ? fontCIDType0C : fontType1C;
+ break;
+ case fofiIdCFFCID:
+ t = fontCIDType0C;
+ break;
+ case fofiIdTrueType:
+ case fofiIdTrueTypeCollection:
+ t = isType0 ? fontCIDType2 : fontTrueType;
+ break;
+ case fofiIdOpenTypeCFF8Bit:
+ t = isType0 ? fontCIDType0COT : fontType1COT;
+ break;
+ case fofiIdOpenTypeCFFCID:
+ t = fontCIDType0COT;
+ break;
+ default:
+ error(errSyntaxError, -1, "Embedded font file may be invalid");
+ break;
+ }
+ }
+ obj4.free();
+ obj3.free();
+ }
+
+ if (t == fontUnknownType) {
+ t = expectedType;
+ }
+
+ if (t != expectedType) {
+ err = gTrue;
+ }
+
+ if (err) {
+ error(errSyntaxWarning, -1,
+ "Mismatch between font type and embedded font file");
+ }
+
+ obj2.free();
+ obj1.free();
+
+ return t;
+}
+
+void GfxFont::readFontDescriptor(XRef *xref, Dict *fontDict) {
+ Object obj1, obj2, obj3, obj4;
+ double t, t2;
+ int i;
+
+ // assume Times-Roman by default (for substitution purposes)
+ flags = fontSerif;
+
+ if (fontDict->lookup("FontDescriptor", &obj1)->isDict()) {
+
+ // get flags
+ if (obj1.dictLookup("Flags", &obj2)->isInt()) {
+ flags = obj2.getInt();
+ }
+ obj2.free();
+
+ // get name
+ obj1.dictLookup("FontName", &obj2);
+ if (obj2.isName()) {
+ embFontName = new GString(obj2.getName());
+ }
+ obj2.free();
+
+ // look for MissingWidth
+ obj1.dictLookup("MissingWidth", &obj2);
+ if (obj2.isNum()) {
+ missingWidth = obj2.getNum();
+ }
+ obj2.free();
+
+ // get Ascent
+ // (CapHeight is a little more reliable - so use it if present)
+ obj1.dictLookup("Ascent", &obj2);
+ obj1.dictLookup("CapHeight", &obj3);
+ if (obj2.isNum() || obj3.isNum()) {
+ if (obj2.isNum()) {
+ t = 0.001 * obj2.getNum();
+ // some broken font descriptors specify a negative ascent
+ if (t < 0) {
+ t = -t;
+ }
+ } else {
+ t = 0;
+ }
+ if (obj3.isNum()) {
+ t2 = 0.001 * obj3.getNum();
+ // some broken font descriptors specify a negative ascent
+ if (t2 < 0) {
+ t2 = -t2;
+ }
+ } else {
+ t2 = 0;
+ }
+ if (t != 0 && t < 1.9) {
+ declaredAscent = t;
+ }
+ // if both Ascent and CapHeight are set, use the smaller one
+ // (because the most common problem is that Ascent is too large)
+ if (t2 != 0 && (t == 0 || t2 < t)) {
+ t = t2;
+ }
+ // some broken font descriptors set ascent and descent to 0;
+ // others set it to ridiculous values (e.g., 32768)
+ if (t != 0 && t < 1.9) {
+ ascent = t;
+ }
+ }
+ obj2.free();
+ obj3.free();
+
+ // get Descent
+ obj1.dictLookup("Descent", &obj2);
+ if (obj2.isNum()) {
+ t = 0.001 * obj2.getNum();
+ // some broken font descriptors specify a positive descent
+ if (t > 0) {
+ t = -t;
+ }
+ // some broken font descriptors set ascent and descent to 0
+ if (t != 0 && t > -1.9) {
+ descent = t;
+ }
+ }
+ obj2.free();
+
+ // font FontBBox
+ if (obj1.dictLookup("FontBBox", &obj2)->isArray()) {
+ for (i = 0; i < 4 && i < obj2.arrayGetLength(); ++i) {
+ if (obj2.arrayGet(i, &obj3)->isNum()) {
+ fontBBox[i] = 0.001 * obj3.getNum();
+ }
+ obj3.free();
+ }
+ }
+ obj2.free();
+
+ }
+ obj1.free();
+}
+
+CharCodeToUnicode *GfxFont::readToUnicodeCMap(Dict *fontDict, int nBits,
+ CharCodeToUnicode *ctu) {
+ GString *buf;
+ Object obj1;
+ char buf2[4096];
+ int n;
+
+ if (!fontDict->lookup("ToUnicode", &obj1)->isStream()) {
+ obj1.free();
+ return NULL;
+ }
+ buf = new GString();
+ obj1.streamReset();
+ while ((n = obj1.streamGetBlock(buf2, sizeof(buf2))) > 0) {
+ buf->append(buf2, n);
+ }
+ obj1.streamClose();
+ obj1.free();
+ if (ctu) {
+ ctu->mergeCMap(buf, nBits);
+ } else {
+ ctu = CharCodeToUnicode::parseCMap(buf, nBits);
+ }
+ delete buf;
+ hasToUnicode = gTrue;
+ return ctu;
+}
+
+GfxFontLoc *GfxFont::locateFont(XRef *xref, GBool ps) {
+ GfxFontLoc *fontLoc;
+ SysFontType sysFontType;
+ FoFiIdentifierType fft;
+ GString *path, *base14Name, *substName;
+ PSFontParam16 *psFont16;
+ Object refObj, embFontObj;
+ int substIdx, fontNum;
+ double oblique;
+ GBool embed;
+
+ if (type == fontType3) {
+ return NULL;
+ }
+
+ //----- embedded font
+ if (embFontID.num >= 0) {
+ embed = gTrue;
+ refObj.initRef(embFontID.num, embFontID.gen);
+ refObj.fetch(xref, &embFontObj);
+ if (!embFontObj.isStream()) {
+ error(errSyntaxError, -1, "Embedded font object is wrong type");
+ embed = gFalse;
+ }
+ embFontObj.free();
+ refObj.free();
+ if (embed) {
+ if (ps) {
+ switch (type) {
+ case fontType1:
+ case fontType1C:
+ case fontType1COT:
+ embed = globalParams->getPSEmbedType1();
+ break;
+ case fontTrueType:
+ case fontTrueTypeOT:
+ embed = globalParams->getPSEmbedTrueType();
+ break;
+ case fontCIDType0C:
+ case fontCIDType0COT:
+ embed = globalParams->getPSEmbedCIDPostScript();
+ break;
+ case fontCIDType2:
+ case fontCIDType2OT:
+ embed = globalParams->getPSEmbedCIDTrueType();
+ break;
+ default:
+ break;
+ }
+ }
+ if (embed) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocEmbedded;
+ fontLoc->fontType = type;
+ fontLoc->embFontID = embFontID;
+ return fontLoc;
+ }
+ }
+ }
+
+ //----- PS passthrough
+ if (ps && name && !isCIDFont() && globalParams->getPSFontPassthrough()) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontType1;
+ fontLoc->path = name->copy();
+ return fontLoc;
+ }
+
+ //----- external font file (fontFile, fontDir)
+ if (name && (path = globalParams->findFontFile(name))) {
+ if ((fontLoc = getExternalFont(path, 0, 0, isCIDFont()))) {
+ return fontLoc;
+ }
+ }
+
+ //----- PS resident Base-14 font
+ if (ps && !isCIDFont() && ((Gfx8BitFont *)this)->base14) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontType1;
+ fontLoc->path = new GString(((Gfx8BitFont *)this)->base14->base14Name);
+ return fontLoc;
+ }
+
+ //----- external font file for Base-14 font
+ if (!ps && !isCIDFont() && ((Gfx8BitFont *)this)->base14) {
+ base14Name = new GString(((Gfx8BitFont *)this)->base14->base14Name);
+ path = globalParams->findBase14FontFile(base14Name, &fontNum, &oblique);
+ delete base14Name;
+ if (path && (fontLoc = getExternalFont(path, fontNum, oblique, gFalse))) {
+ return fontLoc;
+ }
+ }
+
+ //----- system font
+ if (name && (path = globalParams->findSystemFontFile(name, &sysFontType,
+ &fontNum))) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocExternal;
+ fontLoc->path = path;
+ fontLoc->fontNum = fontNum;
+ if (isCIDFont()) {
+ if (sysFontType == sysFontTTF || sysFontType == sysFontTTC) {
+ fontLoc->fontType = fontCIDType2;
+ return fontLoc;
+ } else if (sysFontType == sysFontOTF) {
+ fft = FoFiIdentifier::identifyFile(fontLoc->path->getCString());
+ if (fft == fofiIdOpenTypeCFFCID) {
+ fontLoc->fontType = fontCIDType0COT;
+ return fontLoc;
+ } else if (fft == fofiIdTrueType) {
+ fontLoc->fontType = fontCIDType2;
+ return fontLoc;
+ }
+ }
+ } else {
+ if (sysFontType == sysFontTTF || sysFontType == sysFontTTC) {
+ fontLoc->fontType = fontTrueType;
+ return fontLoc;
+ } else if (sysFontType == sysFontPFA || sysFontType == sysFontPFB) {
+ fontLoc->fontType = fontType1;
+ return fontLoc;
+ } else if (sysFontType == sysFontOTF) {
+ fft = FoFiIdentifier::identifyFile(fontLoc->path->getCString());
+ if (fft == fofiIdOpenTypeCFF8Bit) {
+ fontLoc->fontType = fontType1COT;
+ return fontLoc;
+ } else if (fft == fofiIdTrueType) {
+ fontLoc->fontType = fontTrueTypeOT;
+ return fontLoc;
+ }
+ }
+ }
+ delete fontLoc;
+ }
+
+ if (!isCIDFont()) {
+
+ //----- 8-bit PS resident font
+ if (ps) {
+ if (name && (path = globalParams->getPSResidentFont(name))) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontType1;
+ fontLoc->path = path;
+ return fontLoc;
+ }
+ }
+
+ //----- 8-bit font substitution
+ if (flags & fontFixedWidth) {
+ substIdx = 0;
+ } else if (flags & fontSerif) {
+ substIdx = 8;
+ } else {
+ substIdx = 4;
+ }
+ if (isBold()) {
+ substIdx += 2;
+ }
+ if (isItalic()) {
+ substIdx += 1;
+ }
+ substName = new GString(base14SubstFonts[substIdx]);
+ if (ps) {
+ error(errSyntaxWarning, -1, "Substituting font '{0:s}' for '{1:t}'",
+ base14SubstFonts[substIdx], name);
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontType1;
+ fontLoc->path = substName;
+ fontLoc->substIdx = substIdx;
+ return fontLoc;
+ } else {
+ path = globalParams->findBase14FontFile(substName, &fontNum, &oblique);
+ delete substName;
+ if (path) {
+ if ((fontLoc = getExternalFont(path, fontNum, oblique, gFalse))) {
+ error(errSyntaxWarning, -1, "Substituting font '{0:s}' for '{1:t}'",
+ base14SubstFonts[substIdx], name);
+ fontLoc->substIdx = substIdx;
+ return fontLoc;
+ }
+ }
+ }
+
+ // failed to find a substitute font
+ return NULL;
+ }
+
+ //----- 16-bit PS resident font
+ if (ps && name && ((psFont16 = globalParams->getPSResidentFont16(
+ name,
+ ((GfxCIDFont *)this)->getWMode())))) {
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontCIDType0; // this is not used
+ fontLoc->path = psFont16->psFontName->copy();
+ fontLoc->encoding = psFont16->encoding->copy();
+ fontLoc->wMode = psFont16->wMode;
+ return fontLoc;
+ }
+ if (ps && ((psFont16 = globalParams->getPSResidentFontCC(
+ ((GfxCIDFont *)this)->getCollection(),
+ ((GfxCIDFont *)this)->getWMode())))) {
+ error(errSyntaxWarning, -1, "Substituting font '{0:t}' for '{1:t}'",
+ psFont16->psFontName, name);
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocResident;
+ fontLoc->fontType = fontCIDType0; // this is not used
+ fontLoc->path = psFont16->psFontName->copy();
+ fontLoc->encoding = psFont16->encoding->copy();
+ fontLoc->wMode = psFont16->wMode;
+ return fontLoc;
+ }
+
+ //----- CID font substitution
+ if ((path = globalParams->findCCFontFile(
+ ((GfxCIDFont *)this)->getCollection()))) {
+ if ((fontLoc = getExternalFont(path, 0, 0, gTrue))) {
+ error(errSyntaxWarning, -1, "Substituting font '{0:t}' for '{1:t}'",
+ fontLoc->path, name);
+ return fontLoc;
+ }
+ }
+
+ // failed to find a substitute font
+ return NULL;
+}
+
+GfxFontLoc *GfxFont::locateBase14Font(GString *base14Name) {
+ GString *path;
+ int fontNum;
+ double oblique;
+
+ path = globalParams->findBase14FontFile(base14Name, &fontNum, &oblique);
+ if (!path) {
+ return NULL;
+ }
+ return getExternalFont(path, fontNum, oblique, gFalse);
+}
+
+GfxFontLoc *GfxFont::getExternalFont(GString *path, int fontNum,
+ double oblique, GBool cid) {
+ FoFiIdentifierType fft;
+ GfxFontType fontType;
+ GfxFontLoc *fontLoc;
+
+ fft = FoFiIdentifier::identifyFile(path->getCString());
+ switch (fft) {
+ case fofiIdType1PFA:
+ case fofiIdType1PFB:
+ fontType = fontType1;
+ break;
+ case fofiIdCFF8Bit:
+ fontType = fontType1C;
+ break;
+ case fofiIdCFFCID:
+ fontType = fontCIDType0C;
+ break;
+ case fofiIdTrueType:
+ case fofiIdTrueTypeCollection:
+ fontType = cid ? fontCIDType2 : fontTrueType;
+ break;
+ case fofiIdOpenTypeCFF8Bit:
+ fontType = fontType1COT;
+ break;
+ case fofiIdOpenTypeCFFCID:
+ fontType = fontCIDType0COT;
+ break;
+ case fofiIdDfont:
+ fontType = cid ? fontCIDType2 : fontTrueType;
+ break;
+ case fofiIdUnknown:
+ case fofiIdError:
+ default:
+ fontType = fontUnknownType;
+ break;
+ }
+ if (fontType == fontUnknownType ||
+ (cid ? (fontType < fontCIDType0)
+ : (fontType >= fontCIDType0))) {
+ delete path;
+ return NULL;
+ }
+ fontLoc = new GfxFontLoc();
+ fontLoc->locType = gfxFontLocExternal;
+ fontLoc->fontType = fontType;
+ fontLoc->path = path;
+ fontLoc->fontNum = fontNum;
+ fontLoc->oblique = oblique;
+ return fontLoc;
+}
+
+char *GfxFont::readEmbFontFile(XRef *xref, int *len) {
+ char *buf;
+ Object obj1, obj2;
+ Stream *str;
+ int size, n;
+
+ obj1.initRef(embFontID.num, embFontID.gen);
+ obj1.fetch(xref, &obj2);
+ if (!obj2.isStream()) {
+ error(errSyntaxError, -1, "Embedded font file is not a stream");
+ obj2.free();
+ obj1.free();
+ embFontID.num = -1;
+ return NULL;
+ }
+ str = obj2.getStream();
+
+ size = 4096;
+ buf = (char *)gmalloc(size);
+ *len = 0;
+ str->reset();
+ do {
+ if (*len > size - 4096) {
+ if (size > INT_MAX / 2) {
+ error(errSyntaxError, -1, "Embedded font file is too large");
+ break;
+ }
+ size *= 2;
+ buf = (char *)grealloc(buf, size);
+ }
+ n = str->getBlock(buf + *len, 4096);
+ *len += n;
+ } while (n == 4096);
+ str->close();
+
+ obj2.free();
+ obj1.free();
+
+ return buf;
+}
+
+//------------------------------------------------------------------------
+// Gfx8BitFont
+//------------------------------------------------------------------------
+
+Gfx8BitFont::Gfx8BitFont(XRef *xref, const char *tagA, Ref idA, GString *nameA,
+ GfxFontType typeA, Ref embFontIDA, Dict *fontDict):
+ GfxFont(tagA, idA, nameA, typeA, embFontIDA)
+{
+ GString *name2;
+ BuiltinFont *builtinFont;
+ const char **baseEnc;
+ char *buf;
+ int len;
+ FoFiType1 *ffT1;
+ FoFiType1C *ffT1C;
+ int code, code2;
+ char *charName;
+ GBool missing, hex;
+ Unicode toUnicode[256];
+ CharCodeToUnicode *utu, *ctu2;
+ Unicode uBuf[8];
+ double mul;
+ int firstChar, lastChar;
+ Gushort w;
+ Object obj1, obj2, obj3;
+ int n, i, a, b, m;
+
+ ctu = NULL;
+
+ // do font name substitution for various aliases of the Base 14 font
+ // names
+ base14 = NULL;
+ if (name) {
+ name2 = name->copy();
+ i = 0;
+ while (i < name2->getLength()) {
+ if (name2->getChar(i) == ' ') {
+ name2->del(i);
+ } else {
+ ++i;
+ }
+ }
+ a = 0;
+ b = sizeof(base14FontMap) / sizeof(Base14FontMapEntry);
+ // invariant: base14FontMap[a].altName <= name2 < base14FontMap[b].altName
+ while (b - a > 1) {
+ m = (a + b) / 2;
+ if (name2->cmp(base14FontMap[m].altName) >= 0) {
+ a = m;
+ } else {
+ b = m;
+ }
+ }
+ if (!name2->cmp(base14FontMap[a].altName)) {
+ base14 = &base14FontMap[a];
+ }
+ delete name2;
+ }
+
+ // is it a built-in font?
+ builtinFont = NULL;
+ if (base14) {
+ for (i = 0; i < nBuiltinFonts; ++i) {
+ if (!strcmp(base14->base14Name, builtinFonts[i].name)) {
+ builtinFont = &builtinFonts[i];
+ break;
+ }
+ }
+ }
+
+ // default ascent/descent values
+ if (builtinFont) {
+ missingWidth = builtinFont->missingWidth;
+ ascent = 0.001 * builtinFont->ascent;
+ descent = 0.001 * builtinFont->descent;
+ declaredAscent = ascent;
+ fontBBox[0] = 0.001 * builtinFont->bbox[0];
+ fontBBox[1] = 0.001 * builtinFont->bbox[1];
+ fontBBox[2] = 0.001 * builtinFont->bbox[2];
+ fontBBox[3] = 0.001 * builtinFont->bbox[3];
+ } else {
+ missingWidth = 0;
+ ascent = 0.75;
+ descent = -0.25;
+ declaredAscent = ascent;
+ fontBBox[0] = fontBBox[1] = fontBBox[2] = fontBBox[3] = 0;
+ }
+
+ // get info from font descriptor
+ readFontDescriptor(xref, fontDict);
+
+ // for Base-14 fonts (even if embedded), don't trust the
+ // ascent/descent/bbox values from the font descriptor
+ if (builtinFont) {
+ ascent = 0.001 * builtinFont->ascent;
+ descent = 0.001 * builtinFont->descent;
+ declaredAscent = ascent;
+ fontBBox[0] = 0.001 * builtinFont->bbox[0];
+ fontBBox[1] = 0.001 * builtinFont->bbox[1];
+ fontBBox[2] = 0.001 * builtinFont->bbox[2];
+ fontBBox[3] = 0.001 * builtinFont->bbox[3];
+ }
+
+ // get font matrix
+ fontMat[0] = fontMat[3] = 1;
+ fontMat[1] = fontMat[2] = fontMat[4] = fontMat[5] = 0;
+ if (fontDict->lookup("FontMatrix", &obj1)->isArray()) {
+ for (i = 0; i < 6 && i < obj1.arrayGetLength(); ++i) {
+ if (obj1.arrayGet(i, &obj2)->isNum()) {
+ fontMat[i] = obj2.getNum();
+ }
+ obj2.free();
+ }
+ }
+ obj1.free();
+
+ // get Type 3 bounding box, font definition, and resources
+ if (type == fontType3) {
+ if (fontDict->lookup("FontBBox", &obj1)->isArray()) {
+ for (i = 0; i < 4 && i < obj1.arrayGetLength(); ++i) {
+ if (obj1.arrayGet(i, &obj2)->isNum()) {
+ fontBBox[i] = obj2.getNum();
+ }
+ obj2.free();
+ }
+ }
+ obj1.free();
+ if (!fontDict->lookup("CharProcs", &charProcs)->isDict()) {
+ error(errSyntaxError, -1,
+ "Missing or invalid CharProcs dictionary in Type 3 font");
+ charProcs.free();
+ }
+ if (!fontDict->lookup("Resources", &resources)->isDict()) {
+ resources.free();
+ }
+ }
+
+ //----- build the font encoding -----
+
+ // Encodings start with a base encoding, which can come from
+ // (in order of priority):
+ // 1. FontDict.Encoding or FontDict.Encoding.BaseEncoding
+ // - MacRoman / MacExpert / WinAnsi / Standard
+ // 2. embedded or external font file
+ // 3. default:
+ // - builtin --> builtin encoding
+ // - TrueType --> WinAnsiEncoding
+ // - others --> StandardEncoding
+ // and then add a list of differences (if any) from
+ // FontDict.Encoding.Differences.
+
+ // check FontDict for base encoding
+ hasEncoding = gFalse;
+ usesMacRomanEnc = gFalse;
+ baseEnc = NULL;
+ baseEncFromFontFile = gFalse;
+ fontDict->lookup("Encoding", &obj1);
+ if (obj1.isDict()) {
+ obj1.dictLookup("BaseEncoding", &obj2);
+ if (obj2.isName("MacRomanEncoding")) {
+ hasEncoding = gTrue;
+ usesMacRomanEnc = gTrue;
+ baseEnc = macRomanEncoding;
+ } else if (obj2.isName("MacExpertEncoding")) {
+ hasEncoding = gTrue;
+ baseEnc = macExpertEncoding;
+ } else if (obj2.isName("WinAnsiEncoding")) {
+ hasEncoding = gTrue;
+ baseEnc = winAnsiEncoding;
+ }
+ obj2.free();
+ } else if (obj1.isName("MacRomanEncoding")) {
+ hasEncoding = gTrue;
+ usesMacRomanEnc = gTrue;
+ baseEnc = macRomanEncoding;
+ } else if (obj1.isName("MacExpertEncoding")) {
+ hasEncoding = gTrue;
+ baseEnc = macExpertEncoding;
+ } else if (obj1.isName("WinAnsiEncoding")) {
+ hasEncoding = gTrue;
+ baseEnc = winAnsiEncoding;
+ }
+
+ // check embedded font file for base encoding
+ // (only for Type 1 fonts - trying to get an encoding out of a
+ // TrueType font is a losing proposition)
+ ffT1 = NULL;
+ ffT1C = NULL;
+ buf = NULL;
+ if (type == fontType1 && embFontID.num >= 0) {
+ if ((buf = readEmbFontFile(xref, &len))) {
+ if ((ffT1 = FoFiType1::make(buf, len))) {
+ if (ffT1->getName()) {
+ if (embFontName) {
+ delete embFontName;
+ }
+ embFontName = new GString(ffT1->getName());
+ }
+ if (!baseEnc) {
+ baseEnc = (const char **)ffT1->getEncoding();
+ baseEncFromFontFile = gTrue;
+ }
+ }
+ gfree(buf);
+ }
+ } else if (type == fontType1C && embFontID.num >= 0) {
+ if ((buf = readEmbFontFile(xref, &len))) {
+ if ((ffT1C = FoFiType1C::make(buf, len))) {
+ if (ffT1C->getName()) {
+ if (embFontName) {
+ delete embFontName;
+ }
+ embFontName = new GString(ffT1C->getName());
+ }
+ if (!baseEnc) {
+ baseEnc = (const char **)ffT1C->getEncoding();
+ baseEncFromFontFile = gTrue;
+ }
+ }
+ gfree(buf);
+ }
+ }
+
+ // get default base encoding
+ if (!baseEnc) {
+ if (builtinFont && embFontID.num < 0) {
+ baseEnc = builtinFont->defaultBaseEnc;
+ hasEncoding = gTrue;
+ } else if (type == fontTrueType) {
+ baseEnc = winAnsiEncoding;
+ } else {
+ baseEnc = standardEncoding;
+ }
+ }
+
+ // copy the base encoding
+ for (i = 0; i < 256; ++i) {
+ enc[i] = (char *)baseEnc[i];
+ if ((encFree[i] = (char)baseEncFromFontFile) && enc[i]) {
+ enc[i] = copyString(baseEnc[i]);
+ }
+ }
+
+ // some Type 1C font files have empty encodings, which can break the
+ // T1C->T1 conversion (since the 'seac' operator depends on having
+ // the accents in the encoding), so we fill in any gaps from
+ // StandardEncoding
+ if (type == fontType1C && embFontID.num >= 0 && baseEncFromFontFile) {
+ for (i = 0; i < 256; ++i) {
+ if (!enc[i] && standardEncoding[i]) {
+ enc[i] = (char *)standardEncoding[i];
+ encFree[i] = gFalse;
+ }
+ }
+ }
+
+ // merge differences into encoding
+ if (obj1.isDict()) {
+ obj1.dictLookup("Differences", &obj2);
+ if (obj2.isArray()) {
+ hasEncoding = gTrue;
+ code = 0;
+ for (i = 0; i < obj2.arrayGetLength(); ++i) {
+ obj2.arrayGet(i, &obj3);
+ if (obj3.isInt()) {
+ code = obj3.getInt();
+ } else if (obj3.isName()) {
+ if (code >= 0 && code < 256) {
+ if (encFree[code]) {
+ gfree(enc[code]);
+ }
+ enc[code] = copyString(obj3.getName());
+ encFree[code] = gTrue;
+ }
+ ++code;
+ } else {
+ error(errSyntaxError, -1,
+ "Wrong type in font encoding resource differences ({0:s})",
+ obj3.getTypeName());
+ }
+ obj3.free();
+ }
+ }
+ obj2.free();
+ }
+ obj1.free();
+ if (ffT1) {
+ delete ffT1;
+ }
+ if (ffT1C) {
+ delete ffT1C;
+ }
+
+ //----- build the mapping to Unicode -----
+
+ // pass 1: use the name-to-Unicode mapping table
+ missing = hex = gFalse;
+ for (code = 0; code < 256; ++code) {
+ if ((charName = enc[code])) {
+ if (!(toUnicode[code] = globalParams->mapNameToUnicode(charName)) &&
+ strcmp(charName, ".notdef")) {
+ // if it wasn't in the name-to-Unicode table, check for a
+ // name that looks like 'Axx' or 'xx', where 'A' is any letter
+ // and 'xx' is two hex digits
+ if ((strlen(charName) == 3 &&
+ isalpha(charName[0] & 0xff) &&
+ isxdigit(charName[1] & 0xff) && isxdigit(charName[2] & 0xff) &&
+ ((charName[1] >= 'a' && charName[1] <= 'f') ||
+ (charName[1] >= 'A' && charName[1] <= 'F') ||
+ (charName[2] >= 'a' && charName[2] <= 'f') ||
+ (charName[2] >= 'A' && charName[2] <= 'F'))) ||
+ (strlen(charName) == 2 &&
+ isxdigit(charName[0] & 0xff) && isxdigit(charName[1] & 0xff) &&
+ ((charName[0] >= 'a' && charName[0] <= 'f') ||
+ (charName[0] >= 'A' && charName[0] <= 'F') ||
+ (charName[1] >= 'a' && charName[1] <= 'f') ||
+ (charName[1] >= 'A' && charName[1] <= 'F')))) {
+ hex = gTrue;
+ }
+ missing = gTrue;
+ }
+ } else {
+ toUnicode[code] = 0;
+ }
+ }
+
+ // pass 2: try to fill in the missing chars, looking for names of
+ // any of the following forms:
+ // - 'xx'
+ // - 'Axx'
+ // - 'nn'
+ // - 'Ann'
+ // - 'ABnn'
+ // - 'unixxxx' (possibly followed by garbage - some Arabic files
+ // use 'uni0628.medi', etc.)
+ // where 'A' and 'B' are any letters, 'xx' is two hex digits, 'xxxx'
+ // is four hex digits, and 'nn' is 2-4 decimal digits
+ usedNumericHeuristic = gFalse;
+ if (missing && globalParams->getMapNumericCharNames()) {
+ for (code = 0; code < 256; ++code) {
+ if ((charName = enc[code]) && !toUnicode[code] &&
+ strcmp(charName, ".notdef")) {
+ n = (int)strlen(charName);
+ code2 = -1;
+ if (hex && n == 3 && isalpha(charName[0] & 0xff) &&
+ isxdigit(charName[1] & 0xff) && isxdigit(charName[2] & 0xff)) {
+ sscanf(charName+1, "%x", &code2);
+ } else if (hex && n == 2 &&
+ isxdigit(charName[0] & 0xff) &&
+ isxdigit(charName[1] & 0xff)) {
+ sscanf(charName, "%x", &code2);
+ } else if (!hex && n >= 2 && n <= 4 &&
+ isdigit(charName[0] & 0xff) && isdigit(charName[1] & 0xff)) {
+ code2 = atoi(charName);
+ } else if (n >= 3 && n <= 5 &&
+ isdigit(charName[1] & 0xff) && isdigit(charName[2] & 0xff)) {
+ code2 = atoi(charName+1);
+ } else if (n >= 4 && n <= 6 &&
+ isdigit(charName[2] & 0xff) && isdigit(charName[3] & 0xff)) {
+ code2 = atoi(charName+2);
+ } else if (n >= 7 && charName[0] == 'u' && charName[1] == 'n' &&
+ charName[2] == 'i' &&
+ isxdigit(charName[3] & 0xff) &&
+ isxdigit(charName[4] & 0xff) &&
+ isxdigit(charName[5] & 0xff) &&
+ isxdigit(charName[6] & 0xff)) {
+ sscanf(charName + 3, "%x", &code2);
+ }
+ if (code2 >= 0 && code2 <= 0xffff) {
+ toUnicode[code] = (Unicode)code2;
+ usedNumericHeuristic = gTrue;
+ }
+ }
+ }
+
+ // if the 'mapUnknownCharNames' flag is set, do a simple pass-through
+ // mapping for unknown character names
+ } else if (missing && globalParams->getMapUnknownCharNames()) {
+ for (code = 0; code < 256; ++code) {
+ if (!toUnicode[code]) {
+ toUnicode[code] = code;
+ }
+ }
+ }
+
+ // construct the char code -> Unicode mapping object
+ ctu = CharCodeToUnicode::make8BitToUnicode(toUnicode);
+
+ // merge in a ToUnicode CMap, if there is one -- this overwrites
+ // existing entries in ctu, i.e., the ToUnicode CMap takes
+ // precedence, but the other encoding info is allowed to fill in any
+ // holes
+ readToUnicodeCMap(fontDict, 8, ctu);
+
+ // look for a Unicode-to-Unicode mapping
+ if (name && (utu = globalParams->getUnicodeToUnicode(name))) {
+ for (i = 0; i < 256; ++i) {
+ toUnicode[i] = 0;
+ }
+ ctu2 = CharCodeToUnicode::make8BitToUnicode(toUnicode);
+ for (i = 0; i < 256; ++i) {
+ n = ctu->mapToUnicode((CharCode)i, uBuf, 8);
+ if (n >= 1) {
+ n = utu->mapToUnicode((CharCode)uBuf[0], uBuf, 8);
+ if (n >= 1) {
+ ctu2->setMapping((CharCode)i, uBuf, n);
+ }
+ }
+ }
+ utu->decRefCnt();
+ delete ctu;
+ ctu = ctu2;
+ }
+
+ //----- get the character widths -----
+
+ // initialize all widths
+ for (code = 0; code < 256; ++code) {
+ widths[code] = missingWidth * 0.001;
+ }
+
+ // use widths from font dict, if present
+ fontDict->lookup("FirstChar", &obj1);
+ firstChar = obj1.isInt() ? obj1.getInt() : 0;
+ obj1.free();
+ if (firstChar < 0 || firstChar > 255) {
+ firstChar = 0;
+ }
+ fontDict->lookup("LastChar", &obj1);
+ lastChar = obj1.isInt() ? obj1.getInt() : 255;
+ obj1.free();
+ if (lastChar < 0 || lastChar > 255) {
+ lastChar = 255;
+ }
+ mul = (type == fontType3) ? fontMat[0] : 0.001;
+ fontDict->lookup("Widths", &obj1);
+ if (obj1.isArray()) {
+ flags |= fontFixedWidth;
+ if (obj1.arrayGetLength() < lastChar - firstChar + 1) {
+ lastChar = firstChar + obj1.arrayGetLength() - 1;
+ }
+ for (code = firstChar; code <= lastChar; ++code) {
+ obj1.arrayGet(code - firstChar, &obj2);
+ if (obj2.isNum()) {
+ widths[code] = obj2.getNum() * mul;
+ if (fabs(widths[code] - widths[firstChar]) > 0.00001) {
+ flags &= ~fontFixedWidth;
+ }
+ }
+ obj2.free();
+ }
+
+ // use widths from built-in font
+ } else if (builtinFont) {
+ // this is a kludge for broken PDF files that encode char 32
+ // as .notdef
+ if (builtinFont->widths->getWidth("space", &w)) {
+ widths[32] = 0.001 * w;
+ }
+ for (code = 0; code < 256; ++code) {
+ if (enc[code] && builtinFont->widths->getWidth(enc[code], &w)) {
+ widths[code] = 0.001 * w;
+ }
+ }
+
+ // couldn't find widths -- use defaults
+ } else {
+ // this is technically an error -- the Widths entry is required
+ // for all but the Base-14 fonts -- but certain PDF generators
+ // apparently don't include widths for Arial and TimesNewRoman
+ if (isFixedWidth()) {
+ i = 0;
+ } else if (isSerif()) {
+ i = 8;
+ } else {
+ i = 4;
+ }
+ if (isBold()) {
+ i += 2;
+ }
+ if (isItalic()) {
+ i += 1;
+ }
+ builtinFont = builtinFontSubst[i];
+ // this is a kludge for broken PDF files that encode char 32
+ // as .notdef
+ if (builtinFont->widths->getWidth("space", &w)) {
+ widths[32] = 0.001 * w;
+ }
+ for (code = 0; code < 256; ++code) {
+ if (enc[code] && builtinFont->widths->getWidth(enc[code], &w)) {
+ widths[code] = 0.001 * w;
+ }
+ }
+ }
+ obj1.free();
+
+ ok = gTrue;
+}
+
+Gfx8BitFont::~Gfx8BitFont() {
+ int i;
+
+ for (i = 0; i < 256; ++i) {
+ if (encFree[i] && enc[i]) {
+ gfree(enc[i]);
+ }
+ }
+ ctu->decRefCnt();
+ if (charProcs.isDict()) {
+ charProcs.free();
+ }
+ if (resources.isDict()) {
+ resources.free();
+ }
+}
+
+int Gfx8BitFont::getNextChar(char *s, int len, CharCode *code,
+ Unicode *u, int uSize, int *uLen,
+ double *dx, double *dy, double *ox, double *oy) {
+ CharCode c;
+
+ *code = c = (CharCode)(*s & 0xff);
+ *uLen = ctu->mapToUnicode(c, u, uSize);
+ *dx = widths[c];
+ *dy = *ox = *oy = 0;
+ return 1;
+}
+
+CharCodeToUnicode *Gfx8BitFont::getToUnicode() {
+ ctu->incRefCnt();
+ return ctu;
+}
+
+int *Gfx8BitFont::getCodeToGIDMap(FoFiTrueType *ff) {
+ int *map;
+ int cmapPlatform, cmapEncoding;
+ int unicodeCmap, macRomanCmap, msSymbolCmap, cmap;
+ GBool nonsymbolic, useMacRoman, useUnicode;
+ char *charName;
+ Unicode u;
+ int code, i, n;
+
+ map = (int *)gmallocn(256, sizeof(int));
+ for (i = 0; i < 256; ++i) {
+ map[i] = 0;
+ }
+
+ // This is based on the cmap/encoding selection algorithm in the PDF
+ // 2.0 spec, but with some differences to match up with Adobe's
+ // behavior.
+ unicodeCmap = macRomanCmap = msSymbolCmap = -1;
+ for (i = 0; i < ff->getNumCmaps(); ++i) {
+ cmapPlatform = ff->getCmapPlatform(i);
+ cmapEncoding = ff->getCmapEncoding(i);
+ if ((cmapPlatform == 3 && cmapEncoding == 1) ||
+ (cmapPlatform == 0 && cmapEncoding <= 4)) {
+ unicodeCmap = i;
+ } else if (cmapPlatform == 1 && cmapEncoding == 0) {
+ macRomanCmap = i;
+ } else if (cmapPlatform == 3 && cmapEncoding == 0) {
+ msSymbolCmap = i;
+ }
+ }
+ useMacRoman = gFalse;
+ useUnicode = gFalse;
+ nonsymbolic = !(flags & fontSymbolic);
+ if (usesMacRomanEnc && macRomanCmap >= 0) {
+ cmap = macRomanCmap;
+ useMacRoman = gTrue;
+ } else if (embFontID.num < 0 && hasEncoding && unicodeCmap >= 0) {
+ cmap = unicodeCmap;
+ useUnicode = gTrue;
+ } else if (nonsymbolic && unicodeCmap >= 0) {
+ cmap = unicodeCmap;
+ useUnicode = gTrue;
+ } else if (nonsymbolic && macRomanCmap >= 0) {
+ cmap = macRomanCmap;
+ useMacRoman = gTrue;
+ } else if (msSymbolCmap >= 0) {
+ cmap = msSymbolCmap;
+ } else if (unicodeCmap >= 0) {
+ cmap = unicodeCmap;
+ } else if (macRomanCmap >= 0) {
+ cmap = macRomanCmap;
+ } else {
+ cmap = 0;
+ }
+
+ // reverse map the char names through MacRomanEncoding, then map the
+ // char codes through the cmap; fall back on Unicode if that doesn't
+ // work
+ if (useMacRoman) {
+ for (i = 0; i < 256; ++i) {
+ if ((charName = enc[i])) {
+ if ((code = globalParams->getMacRomanCharCode(charName))) {
+ map[i] = ff->mapCodeToGID(cmap, code);
+ } else if (unicodeCmap >= 0 &&
+ (u = globalParams->mapNameToUnicode(charName))) {
+ map[i] = ff->mapCodeToGID(unicodeCmap, u);
+ }
+ } else if (unicodeCmap >= 0 &&
+ (n = ctu->mapToUnicode((CharCode)i, &u, 1))) {
+ map[i] = ff->mapCodeToGID(cmap, u);
+ } else {
+ map[i] = -1;
+ }
+ }
+
+ // map Unicode through the cmap
+ } else if (useUnicode) {
+ for (i = 0; i < 256; ++i) {
+ if (((charName = enc[i]) &&
+ (u = globalParams->mapNameToUnicode(charName))) ||
+ (n = ctu->mapToUnicode((CharCode)i, &u, 1))) {
+ map[i] = ff->mapCodeToGID(cmap, u);
+ } else {
+ map[i] = -1;
+ }
+ }
+
+ // map the char codes through the cmap, possibly with an offset of
+ // 0xf000
+ } else {
+ for (i = 0; i < 256; ++i) {
+ if (!(map[i] = ff->mapCodeToGID(cmap, i))) {
+ map[i] = ff->mapCodeToGID(cmap, 0xf000 + i);
+ }
+ }
+ }
+
+ // try the TrueType 'post' table to handle any unmapped characters
+ for (i = 0; i < 256; ++i) {
+ if (map[i] <= 0 && (charName = enc[i])) {
+ map[i] = ff->mapNameToGID(charName);
+ }
+ }
+
+ return map;
+}
+
+int *Gfx8BitFont::getCodeToGIDMap(FoFiType1C *ff) {
+ int *map;
+ GHash *nameToGID;
+ int i, gid;
+
+ map = (int *)gmallocn(256, sizeof(int));
+ for (i = 0; i < 256; ++i) {
+ map[i] = 0;
+ }
+
+ nameToGID = ff->getNameToGIDMap();
+ for (i = 0; i < 256; ++i) {
+ if (!enc[i]) {
+ continue;
+ }
+ gid = nameToGID->lookupInt(enc[i]);
+ if (gid < 0 || gid >= 65536) {
+ continue;
+ }
+ map[i] = gid;
+ }
+
+ delete nameToGID;
+
+ return map;
+}
+
+Dict *Gfx8BitFont::getCharProcs() {
+ return charProcs.isDict() ? charProcs.getDict() : (Dict *)NULL;
+}
+
+Object *Gfx8BitFont::getCharProc(int code, Object *proc) {
+ if (enc[code] && charProcs.isDict()) {
+ charProcs.dictLookup(enc[code], proc);
+ } else {
+ proc->initNull();
+ }
+ return proc;
+}
+
+Object *Gfx8BitFont::getCharProcNF(int code, Object *proc) {
+ if (enc[code] && charProcs.isDict()) {
+ charProcs.dictLookupNF(enc[code], proc);
+ } else {
+ proc->initNull();
+ }
+ return proc;
+}
+
+Dict *Gfx8BitFont::getResources() {
+ return resources.isDict() ? resources.getDict() : (Dict *)NULL;
+}
+
+GBool Gfx8BitFont::problematicForUnicode() {
+ GString *nameLC;
+ GBool symbolic;
+
+ // potential inputs:
+ // - font is embedded (GfxFont.embFontID.num >= 0)
+ // - font name (GfxFont.name)
+ // - font type (GfxFont.type)
+ // - Base-14 font (Gfx8BitFont.base14 != NULL)
+ // - symbolic (GfxFont.flags & fontSymbolic)
+ // - has Encoding array (Gfx8BitFont.hasEncoding)
+ // - extracted base encoding from embedded font file
+ // (Gfx8BitFont.baseEncFromFontFile)
+ // - has a ToUnicode map (GfxFont.hasToUnicode)
+ // - used the numeric glyph name heuristic
+ // (Gfx8BitFont.usedNumericHeuristic)
+
+ if (name) {
+ nameLC = name->copy();
+ nameLC->lowerCase();
+ symbolic = strstr(nameLC->getCString(), "dingbat") ||
+ strstr(nameLC->getCString(), "wingding") ||
+ strstr(nameLC->getCString(), "commpi");
+ delete nameLC;
+ if (symbolic) {
+ return gFalse;
+ }
+ }
+
+ if (embFontID.num >= 0) {
+ switch (type) {
+ case fontType1:
+ case fontType1C:
+ case fontType1COT:
+ return !hasToUnicode && (!hasEncoding || usedNumericHeuristic);
+
+ case fontType3:
+ return !hasToUnicode && !hasEncoding;
+
+ case fontTrueType:
+ case fontTrueTypeOT:
+ return !hasToUnicode && !hasEncoding;
+
+ default:
+ return !hasToUnicode;
+ }
+
+ } else {
+ // NB: type will be fontTypeUnknown if the PDF specifies an
+ // invalid font type -- which is ok, if we have a ToUnicode map or
+ // an encoding
+ return !hasToUnicode && !hasEncoding;
+ }
+}
+
+//------------------------------------------------------------------------
+// GfxCIDFont
+//------------------------------------------------------------------------
+
+GfxCIDFont::GfxCIDFont(XRef *xref, const char *tagA, Ref idA, GString *nameA,
+ GfxFontType typeA, Ref embFontIDA, Dict *fontDict):
+ GfxFont(tagA, idA, nameA, typeA, embFontIDA)
+{
+ Dict *desFontDict;
+ Object desFontDictObj;
+ Object obj1, obj2, obj3, obj4, obj5, obj6;
+ CharCodeToUnicode *utu;
+ CharCode c;
+ Unicode uBuf[8];
+ int c1, c2;
+ int excepsSize, i, j, k, n;
+
+ missingWidth = 0;
+ ascent = 0.95;
+ descent = -0.35;
+ declaredAscent = ascent;
+ fontBBox[0] = fontBBox[1] = fontBBox[2] = fontBBox[3] = 0;
+ collection = NULL;
+ cMap = NULL;
+ ctu = NULL;
+ ctuUsesCharCode = gTrue;
+ widths.defWidth = 1.0;
+ widths.defHeight = -1.0;
+ widths.defVY = 0.880;
+ widths.exceps = NULL;
+ widths.nExceps = 0;
+ widths.excepsV = NULL;
+ widths.nExcepsV = 0;
+ cidToGID = NULL;
+ cidToGIDLen = 0;
+
+ // get the descendant font
+ if (!fontDict->lookup("DescendantFonts", &obj1)->isArray() ||
+ obj1.arrayGetLength() == 0) {
+ error(errSyntaxError, -1,
+ "Missing or empty DescendantFonts entry in Type 0 font");
+ obj1.free();
+ goto err1;
+ }
+ if (!obj1.arrayGet(0, &desFontDictObj)->isDict()) {
+ error(errSyntaxError, -1, "Bad descendant font in Type 0 font");
+ goto err2;
+ }
+ obj1.free();
+ desFontDict = desFontDictObj.getDict();
+
+ // get info from font descriptor
+ readFontDescriptor(xref, desFontDict);
+
+ //----- encoding info -----
+
+ // char collection
+ if (!desFontDict->lookup("CIDSystemInfo", &obj1)->isDict()) {
+ error(errSyntaxError, -1,
+ "Missing CIDSystemInfo dictionary in Type 0 descendant font");
+ goto err2;
+ }
+ obj1.dictLookup("Registry", &obj2);
+ obj1.dictLookup("Ordering", &obj3);
+ if (!obj2.isString() || !obj3.isString()) {
+ error(errSyntaxError, -1,
+ "Invalid CIDSystemInfo dictionary in Type 0 descendant font");
+ goto err3;
+ }
+ collection = obj2.getString()->copy()->append('-')->append(obj3.getString());
+ obj3.free();
+ obj2.free();
+ obj1.free();
+
+ // look for a ToUnicode CMap
+ hasKnownCollection = gFalse;
+ if (!(ctu = readToUnicodeCMap(fontDict, 16, NULL))) {
+ ctuUsesCharCode = gFalse;
+
+ // use an identity mapping for the "Adobe-Identity" and
+ // "Adobe-UCS" collections
+ if (!collection->cmp("Adobe-Identity") ||
+ !collection->cmp("Adobe-UCS")) {
+ ctu = CharCodeToUnicode::makeIdentityMapping();
+
+ // look for a user-supplied .cidToUnicode file
+ } else if ((ctu = globalParams->getCIDToUnicode(collection))) {
+ hasKnownCollection = gTrue;
+
+ } else {
+ error(errSyntaxError, -1,
+ "Unknown character collection '{0:t}'", collection);
+
+ // fall back to an identity mapping
+ ctu = CharCodeToUnicode::makeIdentityMapping();
+ }
+ }
+
+ // look for a Unicode-to-Unicode mapping
+ if (name && (utu = globalParams->getUnicodeToUnicode(name))) {
+ if (ctu) {
+ if (ctu->isIdentity()) {
+ ctu->decRefCnt();
+ ctu = utu;
+ } else {
+ for (c = 0; c < ctu->getLength(); ++c) {
+ n = ctu->mapToUnicode(c, uBuf, 8);
+ if (n >= 1) {
+ n = utu->mapToUnicode((CharCode)uBuf[0], uBuf, 8);
+ if (n >= 1) {
+ ctu->setMapping(c, uBuf, n);
+ }
+ }
+ }
+ utu->decRefCnt();
+ }
+ } else {
+ ctu = utu;
+ }
+ }
+
+ // encoding (i.e., CMap)
+ if (fontDict->lookup("Encoding", &obj1)->isNull()) {
+ error(errSyntaxError, -1, "Missing Encoding entry in Type 0 font");
+ goto err2;
+ }
+ if (!(cMap = CMap::parse(NULL, collection, &obj1))) {
+ goto err2;
+ }
+
+ // check for fonts that use the Identity-H encoding (cmap), and the
+ // Adobe-Identity character collection
+ identityEnc = obj1.isName("Identity-H") &&
+ !collection->cmp("Adobe-Identity");
+
+ obj1.free();
+
+ // CIDToGIDMap
+ // (the PDF 1.7 spec only allows these for TrueType fonts, but
+ // Acrobat apparently also allows them for OpenType CFF fonts -- and
+ // the PDF 2.0 spec has removed the prohibition)
+ hasIdentityCIDToGID = gFalse;
+ desFontDict->lookup("CIDToGIDMap", &obj1);
+ if (obj1.isStream()) {
+ cidToGIDLen = 0;
+ i = 64;
+ cidToGID = (int *)gmallocn(i, sizeof(int));
+ obj1.streamReset();
+ while ((c1 = obj1.streamGetChar()) != EOF &&
+ (c2 = obj1.streamGetChar()) != EOF) {
+ if (cidToGIDLen == i) {
+ i *= 2;
+ cidToGID = (int *)greallocn(cidToGID, i, sizeof(int));
+ }
+ cidToGID[cidToGIDLen++] = (c1 << 8) + c2;
+ }
+ obj1.streamClose();
+ identityEnc = gFalse;
+ } else if (obj1.isName("Identity")) {
+ hasIdentityCIDToGID = gTrue;
+ } else if (!obj1.isNull()) {
+ error(errSyntaxError, -1, "Invalid CIDToGIDMap entry in CID font");
+ }
+ obj1.free();
+
+ //----- character metrics -----
+
+ // default char width
+ if (desFontDict->lookup("DW", &obj1)->isInt()) {
+ widths.defWidth = obj1.getInt() * 0.001;
+ }
+ obj1.free();
+
+ // char width exceptions
+ if (desFontDict->lookup("W", &obj1)->isArray()) {
+ excepsSize = 0;
+ i = 0;
+ while (i + 1 < obj1.arrayGetLength()) {
+ obj1.arrayGet(i, &obj2);
+ obj1.arrayGet(i + 1, &obj3);
+ if (obj2.isInt() && obj3.isInt() && i + 2 < obj1.arrayGetLength()) {
+ if (obj1.arrayGet(i + 2, &obj4)->isNum()) {
+ if (widths.nExceps == excepsSize) {
+ excepsSize += 16;
+ widths.exceps = (GfxFontCIDWidthExcep *)
+ greallocn(widths.exceps,
+ excepsSize, sizeof(GfxFontCIDWidthExcep));
+ }
+ widths.exceps[widths.nExceps].first = obj2.getInt();
+ widths.exceps[widths.nExceps].last = obj3.getInt();
+ widths.exceps[widths.nExceps].width = obj4.getNum() * 0.001;
+ ++widths.nExceps;
+ } else {
+ error(errSyntaxError, -1, "Bad widths array in Type 0 font");
+ }
+ obj4.free();
+ i += 3;
+ } else if (obj2.isInt() && obj3.isArray()) {
+ if (widths.nExceps + obj3.arrayGetLength() > excepsSize) {
+ excepsSize = (widths.nExceps + obj3.arrayGetLength() + 15) & ~15;
+ widths.exceps = (GfxFontCIDWidthExcep *)
+ greallocn(widths.exceps,
+ excepsSize, sizeof(GfxFontCIDWidthExcep));
+ }
+ j = obj2.getInt();
+ for (k = 0; k < obj3.arrayGetLength(); ++k) {
+ if (obj3.arrayGet(k, &obj4)->isNum()) {
+ widths.exceps[widths.nExceps].first = j;
+ widths.exceps[widths.nExceps].last = j;
+ widths.exceps[widths.nExceps].width = obj4.getNum() * 0.001;
+ ++j;
+ ++widths.nExceps;
+ } else {
+ error(errSyntaxError, -1, "Bad widths array in Type 0 font");
+ }
+ obj4.free();
+ }
+ i += 2;
+ } else {
+ error(errSyntaxError, -1, "Bad widths array in Type 0 font");
+ ++i;
+ }
+ obj3.free();
+ obj2.free();
+ }
+ }
+ obj1.free();
+
+ // default metrics for vertical font
+ if (desFontDict->lookup("DW2", &obj1)->isArray() &&
+ obj1.arrayGetLength() == 2) {
+ if (obj1.arrayGet(0, &obj2)->isNum()) {
+ widths.defVY = obj2.getNum() * 0.001;
+ }
+ obj2.free();
+ if (obj1.arrayGet(1, &obj2)->isNum()) {
+ widths.defHeight = obj2.getNum() * 0.001;
+ }
+ obj2.free();
+ }
+ obj1.free();
+
+ // char metric exceptions for vertical font
+ if (desFontDict->lookup("W2", &obj1)->isArray()) {
+ excepsSize = 0;
+ i = 0;
+ while (i + 1 < obj1.arrayGetLength()) {
+ obj1.arrayGet(i, &obj2);
+ obj1.arrayGet(i+ 1, &obj3);
+ if (obj2.isInt() && obj3.isInt() && i + 4 < obj1.arrayGetLength()) {
+ if (obj1.arrayGet(i + 2, &obj4)->isNum() &&
+ obj1.arrayGet(i + 3, &obj5)->isNum() &&
+ obj1.arrayGet(i + 4, &obj6)->isNum()) {
+ if (widths.nExcepsV == excepsSize) {
+ excepsSize += 16;
+ widths.excepsV = (GfxFontCIDWidthExcepV *)
+ greallocn(widths.excepsV,
+ excepsSize, sizeof(GfxFontCIDWidthExcepV));
+ }
+ widths.excepsV[widths.nExcepsV].first = obj2.getInt();
+ widths.excepsV[widths.nExcepsV].last = obj3.getInt();
+ widths.excepsV[widths.nExcepsV].height = obj4.getNum() * 0.001;
+ widths.excepsV[widths.nExcepsV].vx = obj5.getNum() * 0.001;
+ widths.excepsV[widths.nExcepsV].vy = obj6.getNum() * 0.001;
+ ++widths.nExcepsV;
+ } else {
+ error(errSyntaxError, -1, "Bad widths (W2) array in Type 0 font");
+ }
+ obj6.free();
+ obj5.free();
+ obj4.free();
+ i += 5;
+ } else if (obj2.isInt() && obj3.isArray()) {
+ if (widths.nExcepsV + obj3.arrayGetLength() / 3 > excepsSize) {
+ excepsSize =
+ (widths.nExcepsV + obj3.arrayGetLength() / 3 + 15) & ~15;
+ widths.excepsV = (GfxFontCIDWidthExcepV *)
+ greallocn(widths.excepsV,
+ excepsSize, sizeof(GfxFontCIDWidthExcepV));
+ }
+ j = obj2.getInt();
+ for (k = 0; k + 2 < obj3.arrayGetLength(); k += 3) {
+ if (obj3.arrayGet(k, &obj4)->isNum() &&
+ obj3.arrayGet(k+1, &obj5)->isNum() &&
+ obj3.arrayGet(k+2, &obj6)->isNum()) {
+ widths.excepsV[widths.nExcepsV].first = j;
+ widths.excepsV[widths.nExcepsV].last = j;
+ widths.excepsV[widths.nExcepsV].height = obj4.getNum() * 0.001;
+ widths.excepsV[widths.nExcepsV].vx = obj5.getNum() * 0.001;
+ widths.excepsV[widths.nExcepsV].vy = obj6.getNum() * 0.001;
+ ++j;
+ ++widths.nExcepsV;
+ } else {
+ error(errSyntaxError, -1, "Bad widths (W2) array in Type 0 font");
+ }
+ obj6.free();
+ obj5.free();
+ obj4.free();
+ }
+ i += 2;
+ } else {
+ error(errSyntaxError, -1, "Bad widths (W2) array in Type 0 font");
+ ++i;
+ }
+ obj3.free();
+ obj2.free();
+ }
+ }
+ obj1.free();
+
+ desFontDictObj.free();
+ ok = gTrue;
+ return;
+
+ err3:
+ obj3.free();
+ obj2.free();
+ err2:
+ obj1.free();
+ desFontDictObj.free();
+ err1:
+ error(errSyntaxError, -1, "Failed to parse font object for '{0:t}'", name);
+}
+
+GfxCIDFont::~GfxCIDFont() {
+ if (collection) {
+ delete collection;
+ }
+ if (cMap) {
+ cMap->decRefCnt();
+ }
+ if (ctu) {
+ ctu->decRefCnt();
+ }
+ gfree(widths.exceps);
+ gfree(widths.excepsV);
+ if (cidToGID) {
+ gfree(cidToGID);
+ }
+}
+
+int GfxCIDFont::getNextChar(char *s, int len, CharCode *code,
+ Unicode *u, int uSize, int *uLen,
+ double *dx, double *dy, double *ox, double *oy) {
+ CID cid;
+ CharCode c;
+ int n;
+
+ if (!cMap) {
+ *code = 0;
+ *uLen = 0;
+ *dx = *dy = 0;
+ return 1;
+ }
+
+ *code = (CharCode)(cid = cMap->getCID(s, len, &c, &n));
+ if (ctu) {
+ *uLen = ctu->mapToUnicode(ctuUsesCharCode ? c : cid, u, uSize);
+ } else {
+ *uLen = 0;
+ }
+ if (!*uLen && uSize >= 1 && globalParams->getMapUnknownCharNames()) {
+ u[0] = *code;
+ *uLen = 1;
+ }
+
+ // horizontal
+ if (cMap->getWMode() == 0) {
+ getHorizontalMetrics(cid, dx);
+ *dy = *ox = *oy = 0;
+
+ // vertical
+ } else {
+ getVerticalMetrics(cid, dy, ox, oy);
+ *dx = 0;
+ }
+
+ return n;
+}
+
+// NB: Section 9.7.4.3 in the PDF 2.0 spec says that, in the case of
+// duplicate entries in the metrics, the first entry should be used.
+// This means we need to leave the metrics in the original order and
+// perform a linear search. (Or use a more complex data structure.)
+void GfxCIDFont::getHorizontalMetrics(CID cid, double *w) {
+ int i;
+ for (i = 0; i < widths.nExceps; ++i) {
+ if (widths.exceps[i].first <= cid && cid <= widths.exceps[i].last) {
+ *w = widths.exceps[i].width;
+ return;
+ }
+ }
+ *w = widths.defWidth;
+}
+
+// NB: Section 9.7.4.3 in the PDF 2.0 spec says that, in the case of
+// duplicate entries in the metrics, the first entry should be used.
+// This means we need to leave the metrics in the original order and
+// perform a linear search. (Or use a more complex data structure.)
+void GfxCIDFont::getVerticalMetrics(CID cid, double *h,
+ double *vx, double *vy) {
+ int i;
+ for (i = 0; i < widths.nExcepsV; ++i) {
+ if (widths.excepsV[i].first <= cid && cid <= widths.excepsV[i].last) {
+ *h = widths.excepsV[i].height;
+ *vx = widths.excepsV[i].vx;
+ *vy = widths.excepsV[i].vy;
+ return;
+ }
+ }
+ *h = widths.defHeight;
+ getHorizontalMetrics(cid, vx);
+ *vx /= 2;
+ *vy = widths.defVY;
+}
+
+int GfxCIDFont::getWMode() {
+ return cMap ? cMap->getWMode() : 0;
+}
+
+CharCodeToUnicode *GfxCIDFont::getToUnicode() {
+ if (ctu) {
+ ctu->incRefCnt();
+ }
+ return ctu;
+}
+
+GString *GfxCIDFont::getCollection() {
+ return cMap ? cMap->getCollection() : (GString *)NULL;
+}
+
+double GfxCIDFont::getWidth(CID cid) {
+ double w;
+
+ getHorizontalMetrics(cid, &w);
+ return w;
+}
+
+GBool GfxCIDFont::problematicForUnicode() {
+ GString *nameLC;
+ GBool symbolic;
+
+ // potential inputs:
+ // - font is embedded (GfxFont.embFontID.num >= 0)
+ // - font name (GfxFont.name)
+ // - font type (GfxFont.type)
+ // - symbolic (GfxFont.flags & fontSymbolic)
+ // - has a ToUnicode map (GfxFont.hasToUnicode)
+ // - collection is Adobe-Identity or Adobe-UCS
+ // (GfxCIDFont.collection - compare string)
+ // - collection is known AdobeCJK (GfxCIDFont.hasKnownCollection)
+ // - has non-Identity CIDToGIDMap (GfxCIDFont.cidToGID != NULL)
+ // - has Identity CIDToGIDMap (GfxCIDFont.hasIdentityCIDToGID)
+
+ if (name) {
+ nameLC = name->copy();
+ nameLC->lowerCase();
+ symbolic = strstr(nameLC->getCString(), "dingbat") ||
+ strstr(nameLC->getCString(), "wingding") ||
+ strstr(nameLC->getCString(), "commpi");
+ delete nameLC;
+ if (symbolic) {
+ return gFalse;
+ }
+ }
+
+ if (embFontID.num >= 0) {
+ switch (type) {
+ case fontCIDType0:
+ case fontCIDType0C:
+ case fontCIDType0COT:
+ return !hasToUnicode && !hasKnownCollection;
+
+ case fontCIDType2:
+ case fontCIDType2OT:
+ return !hasToUnicode && !hasKnownCollection;
+
+ default:
+ return !hasToUnicode;
+ }
+
+ } else {
+ return !hasToUnicode;
+ }
+}
+
+//------------------------------------------------------------------------
+// GfxFontDict
+//------------------------------------------------------------------------
+
+GfxFontDict::GfxFontDict(XRef *xref, Ref *fontDictRef, Dict *fontDict) {
+ GfxFont *font;
+ char *tag;
+ Object obj1, obj2;
+ Ref r;
+ int i;
+
+ fonts = new GHash(gTrue);
+ uniqueFonts = new GList();
+ for (i = 0; i < fontDict->getLength(); ++i) {
+ tag = fontDict->getKey(i);
+ fontDict->getValNF(i, &obj1);
+ obj1.fetch(xref, &obj2);
+ if (!obj2.isDict()) {
+ error(errSyntaxError, -1, "font resource is not a dictionary");
+ } else if (obj1.isRef() && (font = lookupByRef(obj1.getRef()))) {
+ fonts->add(new GString(tag), font);
+ } else {
+ if (obj1.isRef()) {
+ r = obj1.getRef();
+ } else if (fontDictRef) {
+ // legal generation numbers are five digits, so we use a
+ // 6-digit number here
+ r.gen = 100000 + fontDictRef->num;
+ r.num = i;
+ } else {
+ // no indirect reference for this font, or for the containing
+ // font dict, so hash the font and use that
+ r.gen = 100000;
+ r.num = hashFontObject(&obj2);
+ }
+ if ((font = GfxFont::makeFont(xref, tag, r, obj2.getDict()))) {
+ if (!font->isOk()) {
+ delete font;
+ } else {
+ uniqueFonts->append(font);
+ fonts->add(new GString(tag), font);
+ }
+ }
+ }
+ obj1.free();
+ obj2.free();
+ }
+}
+
+GfxFontDict::~GfxFontDict() {
+ deleteGList(uniqueFonts, GfxFont);
+ delete fonts;
+}
+
+GfxFont *GfxFontDict::lookup(char *tag) {
+ return (GfxFont *)fonts->lookup(tag);
+}
+
+GfxFont *GfxFontDict::lookupByRef(Ref ref) {
+ GfxFont *font;
+ int i;
+
+ for (i = 0; i < uniqueFonts->getLength(); ++i) {
+ font = (GfxFont *)uniqueFonts->get(i);
+ if (font->getID()->num == ref.num &&
+ font->getID()->gen == ref.gen) {
+ return font;
+ }
+ }
+ return NULL;
+}
+
+int GfxFontDict::getNumFonts() {
+ return uniqueFonts->getLength();
+}
+
+GfxFont *GfxFontDict::getFont(int i) {
+ return (GfxFont *)uniqueFonts->get(i);
+}
+
+// FNV-1a hash
+class FNVHash {
+public:
+
+ FNVHash() {
+ h = 2166136261U;
+ }
+
+ void hash(char c) {
+ h ^= c & 0xff;
+ h *= 16777619;
+ }
+
+ void hash(char *p, int n) {
+ int i;
+ for (i = 0; i < n; ++i) {
+ hash(p[i]);
+ }
+ }
+
+ int get31() {
+ return (h ^ (h >> 31)) & 0x7fffffff;
+ }
+
+private:
+
+ Guint h;
+};
+
+int GfxFontDict::hashFontObject(Object *obj) {
+ FNVHash h;
+
+ hashFontObject1(obj, &h);
+ return h.get31();
+}
+
+void GfxFontDict::hashFontObject1(Object *obj, FNVHash *h) {
+ Object obj2;
+ GString *s;
+ char *p;
+ double r;
+ int n, i;
+
+ switch (obj->getType()) {
+ case objBool:
+ h->hash('b');
+ h->hash(obj->getBool() ? 1 : 0);
+ break;
+ case objInt:
+ h->hash('i');
+ n = obj->getInt();
+ h->hash((char *)&n, sizeof(int));
+ break;
+ case objReal:
+ h->hash('r');
+ r = obj->getReal();
+ h->hash((char *)&r, sizeof(double));
+ break;
+ case objString:
+ h->hash('s');
+ s = obj->getString();
+ h->hash(s->getCString(), s->getLength());
+ break;
+ case objName:
+ h->hash('n');
+ p = obj->getName();
+ h->hash(p, (int)strlen(p));
+ break;
+ case objNull:
+ h->hash('z');
+ break;
+ case objArray:
+ h->hash('a');
+ n = obj->arrayGetLength();
+ h->hash((char *)&n, sizeof(int));
+ for (i = 0; i < n; ++i) {
+ obj->arrayGetNF(i, &obj2);
+ hashFontObject1(&obj2, h);
+ obj2.free();
+ }
+ break;
+ case objDict:
+ h->hash('d');
+ n = obj->dictGetLength();
+ h->hash((char *)&n, sizeof(int));
+ for (i = 0; i < n; ++i) {
+ p = obj->dictGetKey(i);
+ h->hash(p, (int)strlen(p));
+ obj->dictGetValNF(i, &obj2);
+ hashFontObject1(&obj2, h);
+ obj2.free();
+ }
+ break;
+ case objStream:
+ // this should never happen - streams must be indirect refs
+ break;
+ case objRef:
+ h->hash('f');
+ n = obj->getRefNum();
+ h->hash((char *)&n, sizeof(int));
+ n = obj->getRefGen();
+ h->hash((char *)&n, sizeof(int));
+ break;
+ default:
+ h->hash('u');
+ break;
+ }
+}