/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <cstdio>
#include <cstring>
#include <vector>
#include <assert.h>
#include <fontsubset.hxx>
#include <vcl/strhelper.hxx>
#include <sal/log.hxx>
typedef sal_uInt8 U8;
typedef sal_uInt16 U16;
typedef sal_Int64 S64;
typedef sal_Int32 GlyphWidth;
typedef double RealType;
typedef RealType ValType;
static const char* pStringIds[] = {
/*0*/ ".notdef", "space", "exclam", "quotedbl",
"numbersign", "dollar", "percent", "ampersand",
"quoteright", "parenleft", "parenright", "asterisk",
"plus", "comma", "hyphen", "period",
/*16*/ "slash", "zero", "one", "two",
"three", "four", "five", "six",
"seven", "eight", "nine", "colon",
"semicolon", "less", "equal", "greater",
/*32*/ "question", "at", "A", "B",
"C", "D", "E", "F",
"G", "H", "I", "J",
"K", "L", "M", "N",
/*48*/ "O", "P", "Q", "R",
"S", "T", "U", "V",
"W", "X", "Y", "Z",
"bracketleft", "backslash", "bracketright", "asciicircum",
/*64*/ "underscore", "quoteleft", "a", "b",
"c", "d", "e", "f",
"g", "h", "i", "j",
"k", "l", "m", "n",
/*80*/ "o", "p", "q", "r",
"s", "t", "u", "v",
"w", "x", "y", "z",
"braceleft", "bar", "braceright", "asciitilde",
/*96*/ "exclamdown", "cent", "sterlin", "fraction",
"yen", "florin", "section", "currency",
"quotesingle", "quotedblleft", "guillemotleft", "guilsinglleft",
"guilsinglright", "fi", "fl", "endash",
/*112*/ "dagger", "daggerdbl", "periodcentered", "paragraph",
"bullet", "quotesinglbase", "quotedblbase", "quotedblright",
"guillemotright", "ellipsis", "perthousand", "questiondown",
"grave", "acute", "circumflex", "tilde",
/*128*/ "macron", "breve", "dotaccent", "dieresis",
"ring", "cedilla", "hungarumlaut", "ogonek",
"caron", "emdash", "AE", "ordfeminine",
"Lslash", "Oslash", "OE", "ordmasculine",
/*144*/ "ae", "dotlessi", "lslash", "oslash",
"oe", "germandbls", "onesuperior", "logicalnot",
"mu", "trademark", "Eth", "onehalf",
"plusminus", "Thorn", "onequarter", "divide",
/*160*/ "brokenbar", "degree", "thorn", "threequarters",
"twosuperior", "registered", "minus", "eth",
"multiply", "threesuperior", "copyright", "Aacute",
"Acircumflex", "Adieresis", "Agrave", "Aring",
/*176*/ "Atilde", "Ccedilla", "Eacute", "Ecircumflex",
"Edieresis", "Egrave", "Iacute", "Icircumflex",
"Idieresis", "Igrave", "Ntilde", "Oacute",
"Ocircumflex", "Odieresis", "Ograve", "Otilde",
/*192*/ "Scaron", "Uacute", "Ucircumflex", "Udieresis",
"Ugrave", "Yacute", "Ydieresis", "Zcaron",
"aacute", "acircumflex", "adieresis", "agrave",
"aring", "atilde", "ccedilla", "eacute",
/*208*/ "ecircumflex", "edieresis", "egrave", "iacute",
"icircumflex", "idieresis", "igrave", "ntilde",
"oacute", "ocircumflex", "odieresis", "ograve",
"otilde", "scaron", "uacute", "ucircumflex",
/*224*/ "udieresis", "ugrave", "yacute", "ydieresis",
"zcaron", "exclamsmall", "Hungarumlautsmall","dollaroldstyle",
"dollarsuperior", "ampersandsmall", "Acutesmall", "parenleftsuperior",
"parenrightsuperior","twodotenleader", "onedotenleader", "zerooldstyle",
/*240*/ "oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle",
"fiveoldstyle", "sixoldstyle", "sevenoldstyle", "eightoldstyle",
"nineoldstile", "commasuperior", "threequartersemdash","periodsuperior",
"questionsmall", "asuperior", "bsuperior", "centsuperior",
/*256*/ "dsuperior", "esuperior", "isuperior", "lsuperior",
"msuperior", "nsuperior", "osuperior", "rsuperior",
"ssuperior", "tsuperior", "ff", "ffi",
"ffl", "parenleftinferior","parenrightinferior","Circumflexsmall",
/*272*/ "hyphensuperior","Gravesmall", "Asmall", "Bsmall",
"Csmall", "Dsmall", "Esmall", "Fsmall",
"Gsmall", "Hsmall", "Ismall", "Jsmall",
"Ksmall", "Lsmall", "Msmall", "Nsmall",
/*288*/ "Osmall", "Psmall", "Qsmall", "Rsmall",
"Ssmall", "Tsmall", "Usmall", "Vsmall",
"Wsmall", "Xsmall", "Ysmall", "Zsmall",
"colonmonetary", "onefitted", "rupia", "Tildesmall",
/*304*/ "exclamdownsmall","centoldstyle", "Lslashsmall", "Scaronsmall",
"Zcaronsmall", "Dieresissmall", "Brevesmall", "Caronsmall",
"Dotaccentsmall", "Macronsmall", "figuredash", "hypheninferior",
"Ogoneksmall", "Ringsmall", "Cedillasmall", "questiondownsmall",
/*320*/ "oneeight", "threeeights", "fiveeights", "seveneights",
"onethird", "twothirds", "zerosuperior", "foursuperior",
"fivesuperior", "sixsuperior", "sevensuperior", "eightsuperior",
"ninesuperior", "zeroinferior", "oneinferior", "twoinferior",
/*336*/ "threeinferior","fourinferior", "fiveinferior", "sixinferior",
"seveninferior", "eightinferior", "nineinferior", "centinferior",
"dollarinferior", "periodinferior", "commainferior", "Agravesmall",
"Aacutesmall", "Acircumflexsmall", "Atildesmall", "Adieresissmall",
/*352*/ "Aringsmall", "AEsmall", "Ccedillasmall", "Egravesmall",
"Eacutesmall", "Ecircumflexsmall", "Edieresissmall", "Igravesmall",
"Iacutesmall", "Icircumflexsmall", "Idieresissmall", "Ethsmall",
"Ntildesmall", "Ogravesmall", "Oacutesmall", "Ocircumflexsmall",
/*368*/ "Otildesmall", "Odieressissmall", "OEsmall", "Oslashsmall",
"Ugravesmall", "Uacutesmall", "Ucircumflexsmall", "Udieresissmall",
"Yacutesmall", "Thornsmall", "Ydieresissmall", "001.000",
"001.001", "001.002", "001.003", "Black",
/*384*/ "Bold", "Book", "Light", "Medium",
"Regular", "Roman", "Semibold"
};
// TOP DICT keywords (also covers PRIV DICT keywords)
static const char* pDictOps[] = {
"sVersion", "sNotice", "sFullName", "sFamilyName",
"sWeight", "aFontBBox", "dBlueValues", "dOtherBlues",
"dFamilyBlues", "dFamilyOtherBlues", "nStdHW", "nStdVW",
"xESC", "nUniqueID", "aXUID", "nCharset",
"nEncoding", "nCharStrings", "PPrivate", "nSubrs",
"nDefaultWidthX", "nNominalWidthX", nullptr, nullptr,
nullptr, nullptr, nullptr, nullptr,
"shortint", "longint", "BCD", nullptr
};
// TOP DICT escapes (also covers PRIV DICT escapes)
static const char* pDictEscs[] = {
"sCopyright", "bIsFixedPitch", "nItalicAngle", "nUnderlinePosition",
"nUnderlineThickness", "nPaintType", "tCharstringType", "aFontMatrix",
"nStrokeWidth", "nBlueScale", "nBlueShift", "nBlueFuzz",
"dStemSnapH", "dStemSnapV", "bForceBold", nullptr,
nullptr, "nLanguageGroup", "nExpansionFactor", "nInitialRandomSeed",
"nSyntheticBase", "sPostScript", "sBaseFontName", "dBaseFontBlend",
nullptr, nullptr, nullptr, nullptr,
nullptr, nullptr, "rROS", "nCIDFontVersion",
"nCIDFontRevision", "nCIDFontType", "nCIDCount", "nUIDBase",
"nFDArray", "nFDSelect", "sFontName"
};
struct TYPE1OP
{
enum OPS
{
HSTEM=1, VSTEM=3, VMOVETO=4, RLINETO=5,
HLINETO=6, VLINETO=7, RCURVETO=8, CLOSEPATH=9,
CALLSUBR=10, RETURN=11, T1ESC=12, HSBW=13,
ENDCHAR=14, RMOVETO=21, HMOVETO=22, VHCURVETO=30,
HVCURVETO=31
};
enum ESCS
{
DOTSECTION=0, VSTEM3=1, HSTEM3=2, SEAC=6,
SBW=7, ABS=9, ADD=10, SUB=11,
DIV=12, CALLOTHERSUBR=16, POP=17, SETCURRENTPOINT=33
};
};
struct TYPE2OP
{
enum OPS
{
HSTEM=1, VSTEM=3, VMOVETO=4, RLINETO=5,
HLINETO=6, VLINETO=7, RCURVETO=8, CALLSUBR=10,
RETURN=11, T2ESC=12, ENDCHAR=14, HSTEMHM=18,
HINTMASK=19, CNTRMASK=20, RMOVETO=21, HMOVETO=22,
VSTEMHM=23, RCURVELINE=24, RLINECURVE=25, VVCURVETO=26,
HHCURVETO=27, SHORTINT=28, CALLGSUBR=29, VHCURVETO=30,
HVCURVETO=31
};
enum ESCS
{
AND=3, OR=4, NOT=5, ABS=9,
ADD=10, SUB=11, DIV=12, NEG=14,
EQ=15, DROP=18, PUT=20, GET=21,
IFELSE=22, RANDOM=23, MUL=24, SQRT=26,
DUP=27, EXCH=28, INDEX=29, ROLL=30,
HFLEX=34, FLEX=35, HFLEX1=36, FLEX1=37
};
};
struct CffGlobal
{
explicit CffGlobal();
int mnNameIdxBase;
int mnStringIdxBase;
bool mbCIDFont;
int mnCharStrBase;
int mnCharStrCount;
int mnCharsetBase;
int mnGlobalSubrBase;
int mnGlobalSubrCount;
int mnGlobalSubrBias;
int mnFDSelectBase;
int mnFontDictBase;
int mnFDAryCount;
std::vector<ValType> maFontBBox;
std::vector<ValType> maFontMatrix;
int mnFontNameSID;
int mnFullNameSID;
};
struct CffLocal
{
explicit CffLocal();
int mnPrivDictBase;
int mnPrivDictSize;
int mnLocalSubrOffs;
int mnLocalSubrBase;
int mnLocalSubrBias;
ValType maNominalWidth;
ValType maDefaultWidth;
// ATM hinting related values
ValType maStemStdHW;
ValType maStemStdVW;
std::vector<ValType> maStemSnapH;
std::vector<ValType> maStemSnapV;
std::vector<ValType> maBlueValues;
std::vector<ValType> maOtherBlues;
std::vector<ValType> maFamilyBlues;
std::vector<ValType> maFamilyOtherBlues;
RealType mfBlueScale;
RealType mfBlueShift;
RealType mfBlueFuzz;
RealType mfExpFactor;
int mnLangGroup;
bool mbForceBold;
};
class CffSubsetterContext
: private CffGlobal
{
public:
static const int NMAXSTACK = 48; // see CFF.appendixB
static const int NMAXHINTS = 2*96; // see CFF.appendixB
static const int NMAXTRANS = 32; // see CFF.appendixB
explicit CffSubsetterContext( const U8* pBasePtr, int nBaseLen);
bool initialCffRead();
void emitAsType1( class Type1Emitter&,
const sal_GlyphId* pGlyphIds, const U8* pEncoding,
GlyphWidth* pGlyphWidths, int nGlyphCount, FontSubsetInfo& );
private:
int convert2Type1Ops( CffLocal*, const U8* pType2Ops, int nType2Len, U8* pType1Ops);
void convertOneTypeOp();
void convertOneTypeEsc();
void callType2Subr( bool bGlobal, int nSubrNumber);
sal_Int32 getReadOfs() const { return static_cast<sal_Int32>(mpReadPtr - mpBasePtr);}
const U8* mpBasePtr;
const U8* mpBaseEnd;
const U8* mpReadPtr;
const U8* mpReadEnd;
U8* mpWritePtr;
bool mbNeedClose;
bool mbIgnoreHints;
sal_Int32 mnCntrMask;
int seekIndexData( int nIndexBase, int nDataIndex);
void seekIndexEnd( int nIndexBase);
CffLocal maCffLocal[256];
CffLocal* mpCffLocal;
void readDictOp();
RealType readRealVal();
const char* getString( int nStringID);
int getFDSelect( int nGlyphIndex) const;
int getGlyphSID( int nGlyphIndex) const;
const char* getGlyphName( int nGlyphIndex);
void read2push();
void writeType1Val( ValType);
void writeTypeOp( int nTypeOp);
void writeTypeEsc( int nTypeOp);
void writeCurveTo( int nStackPos, int nIX1, int nIY1, int nIX2, int nIY2, int nIX3, int nIY3);
void pop2MultiWrite( int nArgsPerTypo, int nTypeOp, int nTypeXor=0);
void popAll2Write( int nTypeOp);
public: // TODO: is public really needed?
// accessing the value stack
// TODO: add more checks
void push( ValType nVal) { mnValStack[ mnStackIdx++] = nVal;}
ValType popVal() { return ((mnStackIdx>0) ? mnValStack[ --mnStackIdx] : 0);}
ValType getVal( int nIndex) const { return mnValStack[ nIndex];}
int popInt();
int size() const { return mnStackIdx;}
void clear() { mnStackIdx = 0;}
// accessing the charstring hints
void addHints( bool bVerticalHints);
// accessing other charstring specifics
bool hasCharWidth() const { return (maCharWidth > 0);}
ValType getCharWidth() const { return maCharWidth;}
void setNominalWidth( ValType aWidth) { mpCffLocal->maNominalWidth = aWidth;}
void setDefaultWidth( ValType aWidth) { mpCffLocal->maDefaultWidth = aWidth;}
void updateWidth( bool bUseFirstVal);
private:
// typeop execution context
int mnStackIdx;
ValType mnValStack[ NMAXSTACK+4];
ValType mnTransVals[ NMAXTRANS];
int mnHintSize;
int mnHorzHintSize;
ValType mnHintStack[ NMAXHINTS];
ValType maCharWidth;
};
CffSubsetterContext::CffSubsetterContext( const U8* pBasePtr, int nBaseLen)
: mpBasePtr( pBasePtr)
, mpBaseEnd( pBasePtr+nBaseLen)
, mpReadPtr(nullptr)
, mpReadEnd(nullptr)
, mpWritePtr(nullptr)
, mbNeedClose(false)
, mbIgnoreHints(false)
, mnCntrMask(0)
, mnStackIdx(0)
, mnValStack{}
, mnTransVals{}
, mnHintSize(0)
, mnHorzHintSize(0)
, mnHintStack{}
, maCharWidth(-1)
{
// setCharStringType( 1);
// TODO: new CffLocal[ mnFDAryCount];
mpCffLocal = &maCffLocal[0];
}
inline int CffSubsetterContext::popInt()
{
const ValType aVal = popVal();
const int nInt = static_cast<int>(aVal);
assert( nInt == aVal);
return nInt;
}
inline void CffSubsetterContext::updateWidth( bool bUseFirstVal)
{
#if 1 // TODO: is this still needed?
// the first value is not a hint but the charwidth
if( hasCharWidth())
return;
#endif
if( bUseFirstVal) {
maCharWidth = mpCffLocal->maNominalWidth + mnValStack[0];
// remove bottom stack entry
--mnStackIdx;
for( int i = 0; i < mnStackIdx; ++i)
mnValStack[ i] = mnValStack[ i+1];
} else {
maCharWidth = mpCffLocal->maDefaultWidth;
}
}
void CffSubsetterContext::addHints( bool bVerticalHints)
{
// the first charstring value may a charwidth instead of a charwidth
updateWidth( (mnStackIdx & 1) != 0);
// return early (e.g. no implicit hints for hintmask)
if( !mnStackIdx)
return;
// copy the remaining values to the hint arrays
// assert( (mnStackIdx & 1) == 0); // depends on called subrs
if( mnStackIdx & 1) --mnStackIdx;//#######
// TODO: if( !bSubr) assert( mnStackIdx >= 2);
assert( (mnHintSize + mnStackIdx) <= 2*NMAXHINTS);
ValType nHintOfs = 0;
for( int i = 0; i < mnStackIdx; ++i) {
nHintOfs += mnValStack[ i ];
mnHintStack[ mnHintSize++] = nHintOfs;
}
if( !bVerticalHints)
mnHorzHintSize = mnHintSize;
// clear all values from the stack
mnStackIdx = 0;
}
void CffSubsetterContext::readDictOp()
{
const U8 c = *mpReadPtr;
if( c <= 21 ) {
int nOpId = *(mpReadPtr++);
const char* pCmdName = nullptr;
if( nOpId != 12)
pCmdName = pDictOps[nOpId];
else {
const U8 nExtId = *(mpReadPtr++);
if (nExtId < 39)
pCmdName = pDictEscs[nExtId];
nOpId = 900 + nExtId;
}
if (!pCmdName) // skip reserved operators
return;
//TODO: if( nStackIdx > 0)
int nInt = 0;
switch( *pCmdName) {
default: fprintf( stderr, "unsupported DictOp.type=\'%c\'\n", *pCmdName); break;
case 'b': // bool
nInt = popInt();
switch( nOpId) {
case 915: mpCffLocal->mbForceBold = nInt; break; // "ForceBold"
default: break; // TODO: handle more boolean dictops?
}
break;
case 'n': { // dict-op number
ValType nVal = popVal();
nInt = static_cast<int>(nVal);
switch( nOpId) {
case 10: mpCffLocal->maStemStdHW = nVal; break; // "StdHW"
case 11: mpCffLocal->maStemStdVW = nVal; break; // "StdVW"
case 15: mnCharsetBase = nInt; break; // "charset"
case 16: break; // "nEncoding"
case 17: mnCharStrBase = nInt; break; // "nCharStrings"
case 19: mpCffLocal->mnLocalSubrOffs = nInt; break;// "nSubrs"
case 20: setDefaultWidth( nVal ); break; // "defaultWidthX"
case 21: setNominalWidth( nVal ); break; // "nominalWidthX"
case 909: mpCffLocal->mfBlueScale = nVal; break; // "BlueScale"
case 910: mpCffLocal->mfBlueShift = nVal; break; // "BlueShift"
case 911: mpCffLocal->mfBlueFuzz = nVal; break; // "BlueFuzz"
case 912: mpCffLocal->mfExpFactor = nVal; break; // "ExpansionFactor"
case 917: mpCffLocal->mnLangGroup = nInt; break; // "LanguageGroup"
case 936: mnFontDictBase = nInt; break; // "nFDArray"
case 937: mnFDSelectBase = nInt; break; // "nFDSelect"
default: break; // TODO: handle more numeric dictops?
}
} break;
case 'a': { // array
switch( nOpId) {
case 5: maFontBBox.clear(); break; // "FontBBox"
case 907: maFontMatrix.clear(); break; // "FontMatrix"
default: break; // TODO: reset other arrays?
}
for( int i = 0; i < size(); ++i ) {
ValType nVal = getVal(i);
switch( nOpId) {
case 5: maFontBBox.push_back( nVal); break; // "FontBBox"
case 907: maFontMatrix.push_back( nVal); break; // "FontMatrix"
default: break; // TODO: handle more array dictops?
}
}
clear();
} break;
case 'd': { // delta array
ValType nVal = 0;
for( int i = 0; i < size(); ++i ) {
nVal += getVal(i);
switch( nOpId) {
case 6: mpCffLocal->maBlueValues.push_back( nVal); break; // "BlueValues"
case 7: mpCffLocal->maOtherBlues.push_back( nVal); break; // "OtherBlues"
case 8: mpCffLocal->maFamilyBlues.push_back( nVal); break; // "FamilyBlues"
case 9: mpCffLocal->maFamilyOtherBlues.push_back( nVal); break;// "FamilyOtherBlues"
case 912: mpCffLocal->maStemSnapH.push_back( nVal); break; // "StemSnapH"
case 913: mpCffLocal->maStemSnapV.push_back( nVal); break; // "StemSnapV"
default: break; // TODO: handle more delta-array dictops?
}
}
clear();
} break;
case 's': // stringid (SID)
nInt = popInt();
switch( nOpId ) {
case 2: mnFullNameSID = nInt; break; // "FullName"
case 3: break; // "FamilyName"
case 938: mnFontNameSID = nInt; break; // "FontName"
default: break; // TODO: handle more string dictops?
}
break;
case 'P': // private dict
mpCffLocal->mnPrivDictBase = popInt();
mpCffLocal->mnPrivDictSize = popInt();
break;
case 'r': { // ROS operands
popInt(); // TODO: use sid1
popInt(); // TODO: use sid2
popVal();
mbCIDFont = true;
} break;
case 't': // CharstringType
nInt = popInt();
break;
}
} else if( (c >= 32) || (c == 28) ) {
// --mpReadPtr;
read2push();
} else if( c == 29 ) { // longint
++mpReadPtr; // skip 29
sal_Int32 nS32 = mpReadPtr[0] << 24;
nS32 += mpReadPtr[1] << 16;
nS32 += mpReadPtr[2] << 8;
nS32 += mpReadPtr[3] << 0;
mpReadPtr += 4;
ValType nVal = static_cast<ValType>(nS32);
push( nVal );
} else if( c == 30) { // real number
++mpReadPtr; // skip 30
const RealType fReal = readRealVal();
// push value onto stack
ValType nVal = fReal;
push( nVal);
}
}
void CffSubsetterContext::read2push()
{
ValType aVal = 0;
const U8*& p = mpReadPtr;
const U8 c = *p;
if( c == 28 ) {
sal_Int16 nS16 = (p[1] << 8) + p[2];
aVal = nS16;
p += 3;
} else if( c <= 246 ) { // -107..+107
aVal = static_cast<ValType>(p[0] - 139);
p += 1;
} else if( c <= 250 ) { // +108..+1131
aVal = static_cast<ValType>(((p[0] << 8) + p[1]) - 63124);
p += 2;
} else if( c <= 254 ) { // -108..-1131
aVal = static_cast<ValType>(64148 - ((p[0] << 8) + p[1]));
p += 2;
} else /*if( c == 255)*/ { // Fixed16.16
int nS32 = (p[1] << 24) + (p[2] << 16) + (p[3] << 8) + p[4];
if( (sizeof(nS32) != 2) && (nS32 & (1U<<31)))
nS32 |= (~0U) << 31; // assuming 2s complement
aVal = static_cast<ValType>(nS32 * (1.0 / 0x10000));
p += 5;
}
push( aVal);
}
void CffSubsetterContext::writeType1Val( ValType aVal)
{
U8* pOut = mpWritePtr;
int nInt = static_cast<int>(aVal);
if( (nInt >= -107) && (nInt <= +107)) {
*(pOut++) = static_cast<U8>(nInt + 139); // -107..+107
} else if( (nInt >= -1131) && (nInt <= +1131)) {
if( nInt >= 0)
nInt += 63124; // +108..+1131
else
nInt = 64148 - nInt; // -108..-1131
*(pOut++) = static_cast<U8>(nInt >> 8);
*(pOut++) = static_cast<U8>(nInt);
} else {
// numtype==255 means int32 for Type1, but 16.16 for Type2 charstrings!!!
*(pOut++) = 255;
*(pOut++) = static_cast<U8>(nInt >> 24);
*(pOut++) = static_cast<U8>(nInt >> 16);
*(pOut++) = static_cast<U8>(nInt >> 8);
*(pOut++) = static_cast<U8>(nInt);
}
mpWritePtr = pOut;
}
inline void CffSubsetterContext::writeTypeOp( int nTypeOp)
{
*(mpWritePtr++) = static_cast<U8>(nTypeOp);
}
inline void CffSubsetterContext::writeTypeEsc( int nTypeEsc)
{
*(mpWritePtr++) = TYPE1OP::T1ESC;
*(mpWritePtr++) = static_cast<U8>(nTypeEsc);
}
void CffSubsetterContext::pop2MultiWrite( int nArgsPerTypo, int nTypeOp, int nTypeXor)
{
for( int i = 0; i < mnStackIdx;) {
for( int j = 0; j < nArgsPerTypo; ++j) {
const ValType aVal = mnValStack[i+j];
writeType1Val( aVal);
}
i += nArgsPerTypo;
writeTypeOp( nTypeOp);
nTypeOp ^= nTypeXor; // for toggling vlineto/hlineto
}
clear();
}
void CffSubsetterContext::popAll2Write( int nTypeOp)
{
// pop in reverse order, then write
for( int i = 0; i < mnStackIdx; ++i) {
const ValType aVal = mnValStack[i];
writeType1Val( aVal);
}
clear();
writeTypeOp( nTypeOp);
}
void CffSubsetterContext::writeCurveTo( int nStackPos,
int nIX1, int nIY1, int nIX2, int nIY2, int nIX3, int nIY3)
{
// get the values from the stack
const ValType nDX1 = nIX1 ? mnValStack[ nStackPos+nIX1 ] : 0;
const ValType nDY1 = nIY1 ? mnValStack[ nStackPos+nIY1 ] : 0;
const ValType nDX2 = nIX2 ? mnValStack[ nStackPos+nIX2 ] : 0;
const ValType nDY2 = nIY2 ? mnValStack[ nStackPos+nIY2 ] : 0;
const ValType nDX3 = nIX3 ? mnValStack[ nStackPos+nIX3 ] : 0;
const ValType nDY3 = nIY3 ? mnValStack[ nStackPos+nIY3 ] : 0;
// emit the curveto operator and operands
// TODO: determine the most efficient curveto operator
// TODO: depending on type1op or type2op target
writeType1Val( nDX1 );
writeType1Val( nDY1 );
writeType1Val( nDX2 );
writeType1Val( nDY2 );
writeType1Val( nDX3 );
writeType1Val( nDY3 );
writeTypeOp( TYPE1OP::RCURVETO );
}
void CffSubsetterContext::convertOneTypeOp()
{
const int nType2Op = *(mpReadPtr++);
int i, nInt; // prevent WAE for declarations inside switch cases
// convert each T2op
switch( nType2Op) {
case TYPE2OP::T2ESC:
convertOneTypeEsc();
break;
case TYPE2OP::HSTEM:
case TYPE2OP::VSTEM:
addHints( nType2Op == TYPE2OP::VSTEM );
for( i = 0; i < mnHintSize; i+=2 ) {
writeType1Val( mnHintStack[i]);
writeType1Val( mnHintStack[i+1] - mnHintStack[i]);
writeTypeOp( nType2Op );
}
break;
case TYPE2OP::HSTEMHM:
case TYPE2OP::VSTEMHM:
addHints( nType2Op == TYPE2OP::VSTEMHM);
break;
case TYPE2OP::CNTRMASK:
// TODO: replace cntrmask with vstem3/hstem3
addHints( true);
{
U8 nMaskBit = 0;
U8 nMaskByte = 0;
for( i = 0; i < mnHintSize; i+=2, nMaskBit>>=1) {
if( !nMaskBit) {
nMaskByte = *(mpReadPtr++);
nMaskBit = 0x80;
}
if( !(nMaskByte & nMaskBit))
continue;
if( i >= 8*int(sizeof(mnCntrMask)))
mbIgnoreHints = true;
if( mbIgnoreHints)
continue;
mnCntrMask |= (1U << i);
}
}
break;
case TYPE2OP::HINTMASK:
addHints( true);
{
sal_Int32 nHintMask = 0;
int nCntrBits[2] = {0,0};
U8 nMaskBit = 0;
U8 nMaskByte = 0;
for( i = 0; i < mnHintSize; i+=2, nMaskBit>>=1) {
if( !nMaskBit) {
nMaskByte = *(mpReadPtr++);
nMaskBit = 0x80;
}
if( !(nMaskByte & nMaskBit))
continue;
if( i >= 8*int(sizeof(nHintMask)))
mbIgnoreHints = true;
if( mbIgnoreHints)
continue;
nHintMask |= (1U << i);
nCntrBits[ i < mnHorzHintSize] += (mnCntrMask >> i) & 1;
}
mbIgnoreHints |= (nCntrBits[0] && (nCntrBits[0] != 3));
mbIgnoreHints |= (nCntrBits[1] && (nCntrBits[1] != 3));
if( mbIgnoreHints)
break;
for( i = 0; i < mnHintSize; i+=2) {
if( !(nHintMask & (1U << i)))
continue;
writeType1Val( mnHintStack[i]);
writeType1Val( mnHintStack[i+1] - mnHintStack[i]);
const bool bHorz = (i < mnHorzHintSize);
if( !nCntrBits[ bHorz])
writeTypeOp( bHorz ? TYPE1OP::HSTEM : TYPE1OP::VSTEM);
else if( !--nCntrBits[ bHorz])
writeTypeEsc( bHorz ? TYPE1OP::HSTEM3 : TYPE1OP::VSTEM3);
}
}
break;
case TYPE2OP::CALLSUBR:
case TYPE2OP::CALLGSUBR:
{
nInt = popInt();
const bool bGlobal = (nType2Op == TYPE2OP::CALLGSUBR);
callType2Subr( bGlobal, nInt);
}
break;
case TYPE2OP::RETURN:
// TODO: check that we are in a subroutine
return;
case TYPE2OP::VMOVETO:
case TYPE2OP::HMOVETO:
if( mbNeedClose)
writeTypeOp( TYPE1OP::CLOSEPATH);
else
updateWidth( size() > 1);
mbNeedClose = true;
pop2MultiWrite( 1, nType2Op);
break;
case TYPE2OP::VLINETO:
case TYPE2OP::HLINETO:
pop2MultiWrite( 1, nType2Op,
TYPE1OP::VLINETO ^ TYPE1OP::HLINETO);
break;
case TYPE2OP::RMOVETO:
// TODO: convert rmoveto to vlineto/hlineto if possible
if( mbNeedClose)
writeTypeOp( TYPE1OP::CLOSEPATH);
else
updateWidth( size() > 2);
mbNeedClose = true;
pop2MultiWrite( 2, nType2Op);
break;
case TYPE2OP::RLINETO:
// TODO: convert rlineto to vlineto/hlineto if possible
pop2MultiWrite( 2, nType2Op);
break;
case TYPE2OP::RCURVETO:
// TODO: convert rcurveto to vh/hv/hh/vv-curveto if possible
pop2MultiWrite( 6, nType2Op);
break;
case TYPE2OP::RCURVELINE:
i = 0;
while( (i += 6) <= mnStackIdx)
writeCurveTo( i, -6, -5, -4, -3, -2, -1 );
i -= 6;
while( (i += 2) <= mnStackIdx) {
writeType1Val( mnValStack[i-2]);
writeType1Val( mnValStack[i-1]);
writeTypeOp( TYPE2OP::RLINETO);
}
clear();
break;
case TYPE2OP::RLINECURVE:
i = 0;
while( (i += 2) <= mnStackIdx-6) {
writeType1Val( mnValStack[i-2]);
writeType1Val( mnValStack[i-1]);
writeTypeOp( TYPE2OP::RLINETO);
}
i -= 2;
while( (i += 6) <= mnStackIdx)
writeCurveTo( i, -6, -5, -4, -3, -2, -1 );
clear();
break;
case TYPE2OP::VHCURVETO:
case TYPE2OP::HVCURVETO:
{
bool bVert = (nType2Op == TYPE2OP::VHCURVETO);
i = 0;
nInt = 0;
if( mnStackIdx & 1 )
nInt = static_cast<int>(mnValStack[ --mnStackIdx ]);
while( (i += 4) <= mnStackIdx) {
// TODO: use writeCurveTo()
if( bVert ) writeType1Val( 0 );
writeType1Val( mnValStack[i-4] );
if( !bVert ) writeType1Val( 0);
writeType1Val( mnValStack[i-3] );
writeType1Val( mnValStack[i-2] );
if( !bVert ) writeType1Val( static_cast<ValType>((i==mnStackIdx) ? nInt : 0) );
writeType1Val( mnValStack[i-1] );
if( bVert ) writeType1Val( static_cast<ValType>((i==mnStackIdx) ? nInt : 0) );
bVert = !bVert;
writeTypeOp( TYPE2OP::RCURVETO);
}
}
clear();
break;
case TYPE2OP::HHCURVETO:
i = (mnStackIdx & 1);
while( (i += 4) <= mnStackIdx) {
if( i != 5)
writeCurveTo( i, -4, 0, -3, -2, -1, 0);
else
writeCurveTo( i, -4, -5, -3, -2, -1, 0);
}
clear();
break;
case TYPE2OP::VVCURVETO:
i = (mnStackIdx & 1);
while( (i += 4) <= mnStackIdx) {
if( i != 5)
writeCurveTo( i, 0, -4, -3, -2, 0, -1);
else
writeCurveTo( i, -5, -4, -3, -2, 0, -1);
}
clear();
break;
case TYPE2OP::ENDCHAR:
if( mbNeedClose)
writeTypeOp( TYPE1OP::CLOSEPATH);
else
updateWidth( size() >= 1);
// mbNeedClose = true;
writeTypeOp( TYPE1OP::ENDCHAR);
break;
default:
if( ((nType2Op >= 32) && (nType2Op <= 255)) || (nType2Op == 28)) {
--mpReadPtr;
read2push();
} else {
popAll2Write( nType2Op);
assert(false && "TODO?");
}
break;
}
}
void CffSubsetterContext::convertOneTypeEsc()
{
const int nType2Esc = *(mpReadPtr++);
ValType* pTop = &mnValStack[ mnStackIdx-1];
// convert each T2op
switch( nType2Esc) {
case TYPE2OP::AND:
assert( mnStackIdx >= 2 );
pTop[0] = static_cast<ValType>(static_cast<int>(pTop[0]) & static_cast<int>(pTop[-1]));
--mnStackIdx;
break;
case TYPE2OP::OR:
assert( mnStackIdx >= 2 );
pTop[0] = static_cast<ValType>(static_cast<int>(pTop[0]) | static_cast<int>(pTop[-1]));
--mnStackIdx;
break;
case TYPE2OP::NOT:
assert( mnStackIdx >= 1 );
pTop[0] = ValType(pTop[0] == 0);
break;
case TYPE2OP::ABS:
assert( mnStackIdx >= 1 );
if( pTop[0] >= 0)
break;
SAL_FALLTHROUGH;
case TYPE2OP::NEG:
assert( mnStackIdx >= 1 );
pTop[0] = -pTop[0];
break;
case TYPE2OP::ADD:
assert( mnStackIdx >= 2 );
pTop[0] += pTop[-1];
--mnStackIdx;
break;
case TYPE2OP::SUB:
assert( mnStackIdx >= 2 );
pTop[0] -= pTop[-1];
--mnStackIdx;
break;
case TYPE2OP::MUL:
assert( mnStackIdx >= 2 );
if( pTop[-1])
pTop[0] *= pTop[-1];
--mnStackIdx;
break;
case TYPE2OP::DIV:
assert( mnStackIdx >= 2 );
if( pTop[-1])
pTop[0] /= pTop[-1];
--mnStackIdx;
break;
case TYPE2OP::EQ:
assert( mnStackIdx >= 2 );
pTop[0] = ValType(pTop[0] == pTop[-1]);
--mnStackIdx;
break;
case TYPE2OP::DROP:
assert( mnStackIdx >= 1 );
--mnStackIdx;
break;
case TYPE2OP::PUT: {
assert( mnStackIdx >= 2 );
const int nIdx = static_cast<int>(pTop[0]);
assert( nIdx >= 0 );
assert( nIdx < NMAXTRANS );
mnTransVals[ nIdx] = pTop[-1];
mnStackIdx -= 2;
break;
}
case TYPE2OP::GET: {
assert( mnStackIdx >= 1 );
const int nIdx = static_cast<int>(pTop[0]);
assert( nIdx >= 0 );
assert( nIdx < NMAXTRANS );
pTop[0] = mnTransVals[ nIdx ];
break;
}
case TYPE2OP::IFELSE: {
assert( mnStackIdx >= 4 );
if( pTop[-1] > pTop[0] )
pTop[-3] = pTop[-2];
mnStackIdx -= 3;
break;
}
case TYPE2OP::RANDOM:
pTop[+1] = 1234; // TODO
++mnStackIdx;
break;
case TYPE2OP::SQRT:
// TODO: implement
break;
case TYPE2OP::DUP:
assert( mnStackIdx >= 1 );
pTop[+1] = pTop[0];
++mnStackIdx;
break;
case TYPE2OP::EXCH: {
assert( mnStackIdx >= 2 );
const ValType nVal = pTop[0];
pTop[0] = pTop[-1];
pTop[-1] = nVal;
break;
}
case TYPE2OP::INDEX: {
assert( mnStackIdx >= 1 );
const int nVal = static_cast<int>(pTop[0]);
assert( nVal >= 0 );
assert( nVal < mnStackIdx-1 );
pTop[0] = pTop[-1-nVal];
break;
}
case TYPE2OP::ROLL: {
assert( mnStackIdx >= 1 );
const int nNum = static_cast<int>(pTop[0]);
assert( nNum >= 0);
assert( nNum < mnStackIdx-2 );
(void)nNum; // TODO: implement
// TODO: implement: const int nOfs = static_cast<int>(pTop[-1]);
mnStackIdx -= 2;
break;
}
case TYPE2OP::HFLEX1: {
assert( mnStackIdx == 9);
writeCurveTo( mnStackIdx, -9, -8, -7, -6, -5, 0);
writeCurveTo( mnStackIdx, -4, 0, -3, -2, -1, 0);
// TODO: emulate hflex1 using othersubr call
mnStackIdx -= 9;
}
break;
case TYPE2OP::HFLEX: {
assert( mnStackIdx == 7);
ValType* pX = &mnValStack[ mnStackIdx];
pX[+1] = -pX[-5]; // temp: +dy5==-dy2
writeCurveTo( mnStackIdx, -7, 0, -6, -5, -4, 0);
writeCurveTo( mnStackIdx, -3, 0, -2, +1, -1, 0);
// TODO: emulate hflex using othersubr call
mnStackIdx -= 7;
}
break;
case TYPE2OP::FLEX: {
assert( mnStackIdx == 13 );
writeCurveTo( mnStackIdx, -13, -12, -11, -10, -9, -8 );
writeCurveTo( mnStackIdx, -7, -6, -5, -4, -3, -2 );
// ignoring ValType nFlexDepth = mnValStack[ mnStackIdx-1 ];
mnStackIdx -= 13;
}
break;
case TYPE2OP::FLEX1: {
assert( mnStackIdx == 11 );
// write the first part of the flex1-hinted curve
writeCurveTo( mnStackIdx, -11, -10, -9, -8, -7, -6 );
// determine if nD6 is horizontal or vertical
const int i = mnStackIdx;
ValType nDeltaX = mnValStack[i-11] + mnValStack[i-9] + mnValStack[i-7] + mnValStack[i-5] + mnValStack[i-3];
if( nDeltaX < 0 ) nDeltaX = -nDeltaX;
ValType nDeltaY = mnValStack[i-10] + mnValStack[i-8] + mnValStack[i-6] + mnValStack[i-4] + mnValStack[i-2];
if( nDeltaY < 0 ) nDeltaY = -nDeltaY;
const bool bVertD6 = (nDeltaY > nDeltaX);
// write the second part of the flex1-hinted curve
if( !bVertD6 )
writeCurveTo( mnStackIdx, -5, -4, -3, -2, -1, 0);
else
writeCurveTo( mnStackIdx, -5, -4, -3, -2, 0, -1);
mnStackIdx -= 11;
}
break;
default:
fprintf( stderr,"unhandled type2esc %d\n", nType2Esc);
assert( false);
break;
}
}
void CffSubsetterContext::callType2Subr( bool bGlobal, int nSubrNumber)
{
const U8* const pOldReadPtr = mpReadPtr;
const U8* const pOldReadEnd = mpReadEnd;
if( bGlobal ) {
nSubrNumber += mnGlobalSubrBias;
seekIndexData( mnGlobalSubrBase, nSubrNumber);
} else {
nSubrNumber += mpCffLocal->mnLocalSubrBias;
seekIndexData( mpCffLocal->mnLocalSubrBase, nSubrNumber);
}
while( mpReadPtr < mpReadEnd)
convertOneTypeOp();
mpReadPtr = pOldReadPtr;
mpReadEnd = pOldReadEnd;
}
static const int MAX_T1OPS_SIZE = 81920; // TODO: use dynamic value
int CffSubsetterContext::convert2Type1Ops( CffLocal* pCffLocal, const U8* const pT2Ops, int nT2Len, U8* const pT1Ops)
{
mpCffLocal = pCffLocal;
// prepare the charstring conversion
mpWritePtr = pT1Ops;
#if 1 // TODO: update caller
U8 aType1Ops[ MAX_T1OPS_SIZE];
if( !pT1Ops)
mpWritePtr = aType1Ops;
*const_cast<U8**>(&pT1Ops) = mpWritePtr;
#else
assert( pT1Ops);
#endif
// prepend random seed for T1crypt
*(mpWritePtr++) = 0x48;
*(mpWritePtr++) = 0x44;
*(mpWritePtr++) = 0x55;
*(mpWritePtr++) = ' ';
#if 1 // convert the Type2 charstring to Type1
mpReadPtr = pT2Ops;
mpReadEnd = pT2Ops + nT2Len;
// prepend "hsbw" or "sbw"
// TODO: only emit hsbw when charwidth is known
// TODO: remove charwidth from T2 stack
writeType1Val( 0); // TODO: aSubsetterContext.getLeftSideBearing();
writeType1Val( 1000/*###getCharWidth()###*/);
writeTypeOp( TYPE1OP::HSBW);
mbNeedClose = false;
mbIgnoreHints = false;
mnHintSize=mnHorzHintSize=mnStackIdx=0; maCharWidth=-1;//#######
mnCntrMask = 0;
while( mpReadPtr < mpReadEnd)
convertOneTypeOp();
// if( bActivePath)
// writeTypeOp( TYPE1OP::CLOSEPATH);
// if( bSubRoutine)
// writeTypeOp( TYPE1OP::RETURN);
#else // useful for manually encoding charstrings
mpWritePtr = pT1Ops;
mpWritePtr += sprintf( (char*)mpWritePtr, "OOo_\x8b\x8c\x0c\x10\x0b");
#endif
const int nType1Len = mpWritePtr - pT1Ops;
// encrypt the Type1 charstring
int nRDCryptR = 4330; // TODO: mnRDCryptSeed;
for( U8* p = pT1Ops; p < mpWritePtr; ++p) {
*p ^= (nRDCryptR >> 8);
nRDCryptR = (*p + nRDCryptR) * 52845 + 22719;
}
return nType1Len;
}
RealType CffSubsetterContext::readRealVal()
{
// TODO: more thorough number validity test
bool bComma = false;
int nExpVal = 0;
int nExpSign = 0;
S64 nNumber = 0;
RealType fReal = +1.0;
for(;;){
const U8 c = *(mpReadPtr++); // read nibbles
// parse high nibble
const U8 nH = c >> 4U;
if( nH <= 9) {
nNumber = nNumber * 10 + nH;
--nExpVal;
} else if( nH == 10) { // comma
nExpVal = 0;
bComma = true;
} else if( nH == 11) { // +exp
fReal *= nNumber;
nExpSign = +1;
nNumber = 0;
} else if( nH == 12) { // -exp
fReal *= nNumber;
nExpSign = -1;
nNumber = 0;
} else if( nH == 13) { // reserved
// TODO: ignore or error?
} else if( nH == 14) // minus
fReal = -fReal;
else if( nH == 15) // end
break;
// parse low nibble
const U8 nL = c & 0x0F;
if( nL <= 9) {
nNumber = nNumber * 10 + nL;
--nExpVal;
} else if( nL == 10) { // comma
nExpVal = 0;
bComma = true;
} else if( nL == 11) { // +exp
fReal *= nNumber;
nNumber = 0;
nExpSign = +1;
} else if( nL == 12) { // -exp
fReal *= nNumber;
nNumber = 0;
nExpSign = -1;
} else if( nL == 13) { // reserved
// TODO: ignore or error?
} else if( nL == 14) // minus
fReal = -fReal;
else if( nL == 15) // end
break;
}
// merge exponents
if( !bComma)
nExpVal = 0;
if( !nExpSign) { fReal *= nNumber;}
else if( nExpSign > 0) { nExpVal += static_cast<int>(nNumber);}
else if( nExpSign < 0) { nExpVal -= static_cast<int>(nNumber);}
// apply exponents
if( !nExpVal) { /*nothing to apply*/}
else if( nExpVal > 0) { while( --nExpVal >= 0) fReal *= 10.0;}
else if( nExpVal < 0) { while( ++nExpVal <= 0) fReal /= 10.0;}
return fReal;
}
// prepare to access an element inside a CFF/CID index table
int CffSubsetterContext::seekIndexData( int nIndexBase, int nDataIndex)
{
assert( (nIndexBase > 0) && (mpBasePtr + nIndexBase + 3 <= mpBaseEnd));
if( nDataIndex < 0)
return -1;
mpReadPtr = mpBasePtr + nIndexBase;
const int nDataCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
if( nDataIndex >= nDataCount)
return -1;
const int nDataOfsSz = mpReadPtr[2];
mpReadPtr += 3 + (nDataOfsSz * nDataIndex);
int nOfs1 = 0;
switch( nDataOfsSz) {
default: fprintf( stderr, "\tINVALID nDataOfsSz=%d\n\n", nDataOfsSz); return -1;
case 1: nOfs1 = mpReadPtr[0]; break;
case 2: nOfs1 = (mpReadPtr[0]<<8) + mpReadPtr[1]; break;
case 3: nOfs1 = (mpReadPtr[0]<<16) + (mpReadPtr[1]<<8) + mpReadPtr[2]; break;
case 4: nOfs1 = (mpReadPtr[0]<<24) + (mpReadPtr[1]<<16) + (mpReadPtr[2]<<8) + mpReadPtr[3]; break;
}
mpReadPtr += nDataOfsSz;
int nOfs2 = 0;
switch( nDataOfsSz) {
case 1: nOfs2 = mpReadPtr[0]; break;
case 2: nOfs2 = (mpReadPtr[0]<<8) + mpReadPtr[1]; break;
case 3: nOfs2 = (mpReadPtr[0]<<16) + (mpReadPtr[1]<<8) + mpReadPtr[2]; break;
case 4: nOfs2 = (mpReadPtr[0]<<24) + (mpReadPtr[1]<<16) + (mpReadPtr[2]<<8) + mpReadPtr[3]; break;
}
mpReadPtr = mpBasePtr + (nIndexBase + 2) + nDataOfsSz * (nDataCount + 1) + nOfs1;
mpReadEnd = mpReadPtr + (nOfs2 - nOfs1);
assert( nOfs1 >= 0);
assert( nOfs2 >= nOfs1);
assert( mpReadPtr <= mpBaseEnd);
assert( mpReadEnd <= mpBaseEnd);
return (nOfs2 - nOfs1);
}
// skip over a CFF/CID index table
void CffSubsetterContext::seekIndexEnd( int nIndexBase)
{
assert( (nIndexBase > 0) && (mpBasePtr + nIndexBase + 3 <= mpBaseEnd));
mpReadPtr = mpBasePtr + nIndexBase;
const int nDataCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
const int nDataOfsSz = mpReadPtr[2];
mpReadPtr += 3 + nDataOfsSz * nDataCount;
assert( mpReadPtr <= mpBaseEnd);
int nEndOfs = 0;
switch( nDataOfsSz) {
default: fprintf( stderr, "\tINVALID nDataOfsSz=%d\n\n", nDataOfsSz); return;
case 1: nEndOfs = mpReadPtr[0]; break;
case 2: nEndOfs = (mpReadPtr[0]<<8) + mpReadPtr[1]; break;
case 3: nEndOfs = (mpReadPtr[0]<<16) + (mpReadPtr[1]<<8) + mpReadPtr[2];break;
case 4: nEndOfs = (mpReadPtr[0]<<24) + (mpReadPtr[1]<<16) + (mpReadPtr[2]<<8) + mpReadPtr[3]; break;
}
mpReadPtr += nDataOfsSz;
mpReadPtr += nEndOfs - 1;
mpReadEnd = mpBaseEnd;
assert( nEndOfs >= 0);
assert( mpReadEnd <= mpBaseEnd);
}
// initialize FONTDICT specific values
CffLocal::CffLocal()
: mnPrivDictBase( 0)
, mnPrivDictSize( 0)
, mnLocalSubrOffs( 0)
, mnLocalSubrBase( 0)
, mnLocalSubrBias( 0)
, maNominalWidth( 0)
, maDefaultWidth( 0)
, maStemStdHW( 0)
, maStemStdVW( 0)
, mfBlueScale( 0.0)
, mfBlueShift( 0.0)
, mfBlueFuzz( 0.0)
, mfExpFactor( 0.0)
, mnLangGroup( 0)
, mbForceBold( false)
{
}
CffGlobal::CffGlobal()
: mnNameIdxBase( 0)
, mnStringIdxBase( 0)
, mbCIDFont( false)
, mnCharStrBase( 0)
, mnCharStrCount( 0)
, mnCharsetBase( 0)
, mnGlobalSubrBase( 0)
, mnGlobalSubrCount( 0)
, mnGlobalSubrBias( 0)
, mnFDSelectBase( 0)
, mnFontDictBase( 0)
, mnFDAryCount( 1)
, mnFontNameSID( 0)
, mnFullNameSID( 0)
{
}
bool CffSubsetterContext::initialCffRead()
{
// get the CFFHeader
mpReadPtr = mpBasePtr;
const U8 nVerMajor = *(mpReadPtr++);
const U8 nVerMinor = *(mpReadPtr++);
const U8 nHeaderSize = *(mpReadPtr++);
const U8 nOffsetSize = *(mpReadPtr++);
// TODO: is the version number useful for anything else?
assert( (nVerMajor == 1) && (nVerMinor == 0));
(void)(nVerMajor + nVerMinor + nOffsetSize); // avoid compiler warnings
// prepare access to the NameIndex
mnNameIdxBase = nHeaderSize;
mpReadPtr = mpBasePtr + nHeaderSize;
seekIndexEnd( mnNameIdxBase);
// get the TopDict index
const sal_Int32 nTopDictBase = getReadOfs();
const int nTopDictCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
if( nTopDictCount) {
for( int i = 0; i < nTopDictCount; ++i) {
seekIndexData( nTopDictBase, i);
while( mpReadPtr < mpReadEnd)
readDictOp();
assert( mpReadPtr == mpReadEnd);
}
}
// prepare access to the String index
mnStringIdxBase = getReadOfs();
seekIndexEnd( mnStringIdxBase);
// prepare access to the GlobalSubr index
mnGlobalSubrBase = getReadOfs();
mnGlobalSubrCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
mnGlobalSubrBias = (mnGlobalSubrCount<1240)?107:(mnGlobalSubrCount<33900)?1131:32768;
// skip past the last GlobalSubr entry
// seekIndexEnd( mnGlobalSubrBase);
// get/skip the Encodings (we got mnEncodingBase from TOPDICT)
// seekEncodingsEnd( mnEncodingBase);
// get/skip the Charsets (we got mnCharsetBase from TOPDICT)
// seekCharsetsEnd( mnCharStrBase);
// get/skip FDSelect (CID only) data
// prepare access to the CharStrings index (we got the base from TOPDICT)
mpReadPtr = mpBasePtr + mnCharStrBase;
mnCharStrCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
// seekIndexEnd( mnCharStrBase);
// read the FDArray index (CID only)
if( mbCIDFont) {
// assert( mnFontDictBase == tellRel());
mpReadPtr = mpBasePtr + mnFontDictBase;
mnFDAryCount = (mpReadPtr[0]<<8) + mpReadPtr[1];
if (static_cast<size_t>(mnFDAryCount) >= SAL_N_ELEMENTS(maCffLocal))
{
SAL_INFO("vcl.fonts", "CffSubsetterContext: too many CFF in font");
return false;
}
// read FDArray details to get access to the PRIVDICTs
for( int i = 0; i < mnFDAryCount; ++i) {
mpCffLocal = &maCffLocal[i];
seekIndexData( mnFontDictBase, i);
while( mpReadPtr < mpReadEnd)
readDictOp();
assert( mpReadPtr == mpReadEnd);
}
}
for( int i = 0; i < mnFDAryCount; ++i) {
mpCffLocal = &maCffLocal[i];
// get the PrivateDict index
// (we got mnPrivDictSize and mnPrivDictBase from TOPDICT or FDArray)
if( mpCffLocal->mnPrivDictSize != 0) {
assert( mpCffLocal->mnPrivDictSize > 0);
// get the PrivDict data
mpReadPtr = mpBasePtr + mpCffLocal->mnPrivDictBase;
mpReadEnd = mpReadPtr + mpCffLocal->mnPrivDictSize;
assert( mpReadEnd <= mpBaseEnd);
// read PrivDict details
while( mpReadPtr < mpReadEnd)
readDictOp();
}
// prepare access to the LocalSubrs (we got mnLocalSubrOffs from PRIVDICT)
if( mpCffLocal->mnLocalSubrOffs) {
// read LocalSubrs summary
mpCffLocal->mnLocalSubrBase = mpCffLocal->mnPrivDictBase + mpCffLocal->mnLocalSubrOffs;
mpReadPtr = mpBasePtr + mpCffLocal->mnLocalSubrBase;
const int nSubrCount = (mpReadPtr[0] << 8) + mpReadPtr[1];
mpCffLocal->mnLocalSubrBias = (nSubrCount<1240)?107:(nSubrCount<33900)?1131:32768;
// seekIndexEnd( mpCffLocal->mnLocalSubrBase);
}
}
// ignore the Notices info
return true;
}
// get a cstring from a StringID
const char* CffSubsetterContext::getString( int nStringID)
{
// get a standard string if possible
const static int nStdStrings = SAL_N_ELEMENTS(pStringIds);
if( (nStringID >= 0) && (nStringID < nStdStrings))
return pStringIds[ nStringID];
// else get the string from the StringIndex table
const U8* pReadPtr = mpReadPtr;
const U8* pReadEnd = mpReadEnd;
nStringID -= nStdStrings;
int nLen = seekIndexData( mnStringIdxBase, nStringID);
// assert( nLen >= 0);
// TODO: just return the undecorated name
// TODO: get rid of static char buffer
static char aNameBuf[ 2560];
if( nLen < 0) {
sprintf( aNameBuf, "name[%d].notfound!", nStringID);
} else {
const int nMaxLen = sizeof(aNameBuf) - 1;
if( nLen >= nMaxLen)
nLen = nMaxLen;
for( int i = 0; i < nLen; ++i)
aNameBuf[i] = *(mpReadPtr++);
aNameBuf[ nLen] = '\0';
}
mpReadPtr = pReadPtr;
mpReadEnd = pReadEnd;
return aNameBuf;
}
// access a CID's FDSelect table
int CffSubsetterContext::getFDSelect( int nGlyphIndex) const
{
assert( nGlyphIndex >= 0);
assert( nGlyphIndex < mnCharStrCount);
if( !mbCIDFont)
return 0;
const U8* pReadPtr = mpBasePtr + mnFDSelectBase;
const U8 nFDSelFormat = *(pReadPtr++);
switch( nFDSelFormat) {
case 0: { // FDSELECT format 0
pReadPtr += nGlyphIndex;
const U8 nFDIdx = *(pReadPtr++);
return nFDIdx;
} //break;
case 3: { // FDSELECT format 3
const U16 nRangeCount = (pReadPtr[0]<<8) + pReadPtr[1];
assert( nRangeCount > 0);
assert( nRangeCount <= mnCharStrCount);
U16 nPrev = (pReadPtr[2]<<8) + pReadPtr[3];
assert( nPrev == 0);
(void)nPrev;
pReadPtr += 4;
// TODO? binary search
for( int i = 0; i < nRangeCount; ++i) {
const U8 nFDIdx = pReadPtr[0];
const U16 nNext = (pReadPtr[1]<<8) + pReadPtr[2];
assert( nPrev < nNext);
if( nGlyphIndex < nNext)
return nFDIdx;
pReadPtr += 3;
nPrev = nNext;
}
} break;
default: // invalid FDselect format
fprintf( stderr, "invalid CFF.FdselType=%d\n", nFDSelFormat);
break;
}
assert( false);
return -1;
}
int CffSubsetterContext::getGlyphSID( int nGlyphIndex) const
{
if( nGlyphIndex == 0)
return 0; // ".notdef"
assert( nGlyphIndex >= 0);
assert( nGlyphIndex < mnCharStrCount);
if( (nGlyphIndex < 0) || (nGlyphIndex >= mnCharStrCount))
return -1;
// get the SID/CID from the Charset table
const U8* pReadPtr = mpBasePtr + mnCharsetBase;
const U8 nCSetFormat = *(pReadPtr++);
int nGlyphsToSkip = nGlyphIndex - 1;
switch( nCSetFormat) {
case 0: // charset format 0
pReadPtr += 2 * nGlyphsToSkip;
nGlyphsToSkip = 0;
break;
case 1: // charset format 1
while( nGlyphsToSkip >= 0) {
const int nLeft = pReadPtr[2];
if( nGlyphsToSkip <= nLeft)
break;
nGlyphsToSkip -= nLeft + 1;
pReadPtr += 3;
}
break;
case 2: // charset format 2
while( nGlyphsToSkip >= 0) {
const int nLeft = (pReadPtr[2]<<8) + pReadPtr[3];
if( nGlyphsToSkip <= nLeft)
break;
nGlyphsToSkip -= nLeft + 1;
pReadPtr += 4;
}
break;
default:
fprintf( stderr, "ILLEGAL CFF-Charset format %d\n", nCSetFormat);
return -2;
}
int nSID = (pReadPtr[0]<<8) + pReadPtr[1];
nSID += nGlyphsToSkip;
// NOTE: for CID-fonts the resulting SID is interpreted as CID
return nSID;
}
// NOTE: the result becomes invalid with the next call to this method
const char* CffSubsetterContext::getGlyphName( int nGlyphIndex)
{
// the first glyph is always the .notdef glyph
const char* pGlyphName = ".notdef";
if( nGlyphIndex == 0)
return pGlyphName;
// prepare a result buffer
// TODO: get rid of static buffer
static char aDefaultGlyphName[64];
pGlyphName = aDefaultGlyphName;
// get the glyph specific name
const int nSID = getGlyphSID( nGlyphIndex);
if( nSID < 0) // default glyph name
sprintf( aDefaultGlyphName, "gly%03d", nGlyphIndex);
else if( mbCIDFont) // default glyph name in CIDs
sprintf( aDefaultGlyphName, "cid%03d", nSID);
else { // glyph name from string table
const char* pSidName = getString( nSID);
// check validity of glyph name
if( pSidName) {
const char* p = pSidName;
while( (*p >= '0') && (*p <= 'z')) ++p;
if( (p >= pSidName+1) && (*p == '\0'))
pGlyphName = pSidName;
}
// if needed invent a fallback name
if( pGlyphName != pSidName)
sprintf( aDefaultGlyphName, "bad%03d", nSID);
}
return pGlyphName;
}
class Type1Emitter
{
public:
explicit Type1Emitter( FILE* pOutFile, bool bPfbSubset);
~Type1Emitter();
void setSubsetName( const char* );
size_t emitRawData( const char* pData, size_t nLength) const;
void emitAllRaw();
void emitAllHex();
void emitAllCrypted();
int tellPos() const;
void updateLen( int nTellPos, size_t nLength);
void emitValVector( const char* pLineHead, const char* pLineTail, const std::vector<ValType>&);
private:
FILE* mpFileOut;
char maBuffer[MAX_T1OPS_SIZE]; // TODO: dynamic allocation
int mnEECryptR;
public:
char* mpPtr;
char maSubsetName[256];
bool mbPfbSubset;
int mnHexLineCol;
};
Type1Emitter::Type1Emitter( FILE* pOutFile, bool bPfbSubset)
: mpFileOut( pOutFile)
, maBuffer{}
, mnEECryptR( 55665) // default eexec seed, TODO: mnEECryptSeed
, mpPtr( maBuffer)
, mbPfbSubset( bPfbSubset)
, mnHexLineCol( 0)
{
maSubsetName[0] = '\0';
}
Type1Emitter::~Type1Emitter()
{
if( !mpFileOut)
return;
mpFileOut = nullptr;
}
void Type1Emitter::setSubsetName( const char* pSubsetName)
{
maSubsetName[0] = '\0';
if( pSubsetName)
strncpy( maSubsetName, pSubsetName, sizeof(maSubsetName));
maSubsetName[sizeof(maSubsetName)-1] = '\0';
}
int Type1Emitter::tellPos() const
{
int nTellPos = ftell( mpFileOut);
return nTellPos;
}
void Type1Emitter::updateLen( int nTellPos, size_t nLength)
{
// update PFB segment header length
U8 cData[4];
cData[0] = static_cast<U8>(nLength >> 0);
cData[1] = static_cast<U8>(nLength >> 8);
cData[2] = static_cast<U8>(nLength >> 16);
cData[3] = static_cast<U8>(nLength >> 24);
const long nCurrPos = ftell(mpFileOut);
if (nCurrPos < 0)
return;
if (fseek( mpFileOut, nTellPos, SEEK_SET) != 0)
return;
fwrite(cData, 1, sizeof(cData), mpFileOut);
if( nCurrPos >= 0)
(void)fseek(mpFileOut, nCurrPos, SEEK_SET);
}
inline size_t Type1Emitter::emitRawData(const char* pData, size_t nLength) const
{
return fwrite( pData, 1, nLength, mpFileOut);
}
inline void Type1Emitter::emitAllRaw()
{
// writeout raw data
assert( (mpPtr - maBuffer) < int(sizeof(maBuffer)));
emitRawData( maBuffer, mpPtr - maBuffer);
// reset the raw buffer
mpPtr = maBuffer;
}
inline void Type1Emitter::emitAllHex()
{
assert( (mpPtr - maBuffer) < int(sizeof(maBuffer)));
for( const char* p = maBuffer; p < mpPtr;) {
// convert binary chunk to hex
char aHexBuf[0x4000];
char* pOut = aHexBuf;
while( (p < mpPtr) && (pOut < aHexBuf+sizeof(aHexBuf)-4)) {
// convert each byte to hex
char cNibble = (static_cast<unsigned char>(*p) >> 4) & 0x0F;
cNibble += (cNibble < 10) ? '0' : 'A'-10;
*(pOut++) = cNibble;
cNibble = *(p++) & 0x0F;
cNibble += (cNibble < 10) ? '0' : 'A'-10;
*(pOut++) = cNibble;
// limit the line length
if( (++mnHexLineCol & 0x3F) == 0)
*(pOut++) = '\n';
}
// writeout hex-converted chunk
emitRawData( aHexBuf, pOut-aHexBuf);
}
// reset the raw buffer
mpPtr = maBuffer;
}
void Type1Emitter::emitAllCrypted()
{
// apply t1crypt
for( char* p = maBuffer; p < mpPtr; ++p) {
*p ^= (mnEECryptR >> 8);
mnEECryptR = (*reinterpret_cast<U8*>(p) + mnEECryptR) * 52845 + 22719;
}
// emit the t1crypt result
if( mbPfbSubset)
emitAllRaw();
else
emitAllHex();
}
// #i110387# quick-and-dirty double->ascii conversion
// needed because sprintf/ecvt/etc. alone are too localized (LC_NUMERIC)
// also strip off trailing zeros in fraction while we are at it
inline int dbl2str( char* pOut, double fVal)
{
const int nLen = psp::getValueOfDouble( pOut, fVal, 6);
return nLen;
}
void Type1Emitter::emitValVector( const char* pLineHead, const char* pLineTail,
const std::vector<ValType>& rVector)
{
// ignore empty vectors
if( rVector.empty())
return;
// emit the line head
mpPtr += sprintf( mpPtr, "%s", pLineHead);
// emit the vector values
std::vector<ValType>::value_type aVal = 0;
for( std::vector<ValType>::const_iterator it = rVector.begin();;) {
aVal = *it;
if( ++it == rVector.end() )
break;
mpPtr += dbl2str( mpPtr, aVal);
*(mpPtr++) = ' ';
}
// emit the last value
mpPtr += dbl2str( mpPtr, aVal);
// emit the line tail
mpPtr += sprintf( mpPtr, "%s", pLineTail);
}
void CffSubsetterContext::emitAsType1( Type1Emitter& rEmitter,
const sal_GlyphId* pReqGlyphIds, const U8* pReqEncoding,
GlyphWidth* pGlyphWidths, int nGlyphCount, FontSubsetInfo& rFSInfo)
{
// prepare some fontdirectory details
static const int nUniqueIdBase = 4100000; // using private-interchange UniqueIds
static int nUniqueId = nUniqueIdBase;
++nUniqueId;
char* pFontName = rEmitter.maSubsetName;
if( !*pFontName ) {
if( mnFontNameSID) {
// get the fontname directly if available
strncpy( pFontName, getString( mnFontNameSID), sizeof(rEmitter.maSubsetName) - 1);
pFontName[sizeof(rEmitter.maSubsetName) - 1] = 0;
} else if( mnFullNameSID) {
// approximate fontname as fullname-whitespace
const char* pI = getString( mnFullNameSID);
char* pO = pFontName;
const char* pLimit = pFontName + sizeof(rEmitter.maSubsetName) - 1;
while( pO < pLimit) {
const char c = *(pI++);
if( c != ' ')
*(pO++) = c;
if( !c)
break;
}
*pO = '\0';
} else {
// fallback name of last resort
strncpy( pFontName, "DummyName", sizeof(rEmitter.maSubsetName));
}
}
const char* pFullName = pFontName;
const char* pFamilyName = pFontName;
char*& pOut = rEmitter.mpPtr; // convenience reference, TODO: cleanup
// create a PFB+Type1 header
if( rEmitter.mbPfbSubset ) {
static const char aPfbHeader[] = "\x80\x01\x00\x00\x00\x00";
rEmitter.emitRawData( aPfbHeader, sizeof(aPfbHeader)-1);
}
pOut += sprintf( pOut, "%%!FontType1-1.0: %s 001.003\n", rEmitter.maSubsetName);
// emit TOPDICT
pOut += sprintf( pOut,
"11 dict begin\n" // TODO: dynamic entry count for TOPDICT
"/FontType 1 def\n"
"/PaintType 0 def\n");
pOut += sprintf( pOut, "/FontName /%s def\n", rEmitter.maSubsetName);
pOut += sprintf( pOut, "/UniqueID %d def\n", nUniqueId);
// emit FontMatrix
if( maFontMatrix.size() == 6)
rEmitter.emitValVector( "/FontMatrix [", "]readonly def\n", maFontMatrix);
else // emit default FontMatrix if needed
pOut += sprintf( pOut, "/FontMatrix [0.001 0 0 0.001 0 0]readonly def\n");
// emit FontBBox
if( maFontBBox.size() == 4)
rEmitter.emitValVector( "/FontBBox {", "}readonly def\n", maFontBBox);
else // emit default FontBBox if needed
pOut += sprintf( pOut, "/FontBBox {0 0 999 999}readonly def\n");
// emit FONTINFO into TOPDICT
pOut += sprintf( pOut,
"/FontInfo 2 dict dup begin\n" // TODO: check fontinfo entry count
" /FullName (%s) readonly def\n"
" /FamilyName (%s) readonly def\n"
"end readonly def\n",
pFullName, pFamilyName);
pOut += sprintf( pOut,
"/Encoding 256 array\n"
"0 1 255 {1 index exch /.notdef put} for\n");
for( int i = 1; (i < nGlyphCount) && (i < 256); ++i) {
const char* pGlyphName = getGlyphName( pReqGlyphIds[i]);
pOut += sprintf( pOut, "dup %d /%s put\n", pReqEncoding[i], pGlyphName);
}
pOut += sprintf( pOut, "readonly def\n");
pOut += sprintf( pOut,
// TODO: more topdict entries
"currentdict end\n"
"currentfile eexec\n");
// emit PFB header
rEmitter.emitAllRaw();
if( rEmitter.mbPfbSubset) {
// update PFB header segment
const int nPfbHeaderLen = rEmitter.tellPos() - 6;
rEmitter.updateLen( 2, nPfbHeaderLen);
// prepare start of eexec segment
rEmitter.emitRawData( "\x80\x02\x00\x00\x00\x00", 6); // segment start
}
const int nEExecSegTell = rEmitter.tellPos();
// which always starts with a privdict
// count the privdict entries
int nPrivEntryCount = 9;
// emit blue hints only if non-default values
nPrivEntryCount += int(!mpCffLocal->maOtherBlues.empty());
nPrivEntryCount += int(!mpCffLocal->maFamilyBlues.empty());
nPrivEntryCount += int(!mpCffLocal->maFamilyOtherBlues.empty());
nPrivEntryCount += int(mpCffLocal->mfBlueScale != 0.0);
nPrivEntryCount += int(mpCffLocal->mfBlueShift != 0.0);
nPrivEntryCount += int(mpCffLocal->mfBlueFuzz != 0.0);
// emit stem hints only if non-default values
nPrivEntryCount += int(mpCffLocal->maStemStdHW != 0);
nPrivEntryCount += int(mpCffLocal->maStemStdVW != 0);
nPrivEntryCount += int(!mpCffLocal->maStemSnapH.empty());
nPrivEntryCount += int(!mpCffLocal->maStemSnapV.empty());
// emit other hints only if non-default values
nPrivEntryCount += int(mpCffLocal->mfExpFactor != 0.0);
nPrivEntryCount += int(mpCffLocal->mnLangGroup != 0);
nPrivEntryCount += int(mpCffLocal->mnLangGroup == 1);
nPrivEntryCount += int(mpCffLocal->mbForceBold);
// emit the privdict header
pOut += sprintf( pOut,
"\110\104\125 "
"dup\n/Private %d dict dup begin\n"
"/RD{string currentfile exch readstring pop}executeonly def\n"
"/ND{noaccess def}executeonly def\n"
"/NP{noaccess put}executeonly def\n"
"/MinFeature{16 16}ND\n"
"/password 5839 def\n", // TODO: mnRDCryptSeed?
nPrivEntryCount);
// emit blue hint related privdict entries
if( !mpCffLocal->maBlueValues.empty())
rEmitter.emitValVector( "/BlueValues [", "]ND\n", mpCffLocal->maBlueValues);
else
pOut += sprintf( pOut, "/BlueValues []ND\n"); // default to empty BlueValues
rEmitter.emitValVector( "/OtherBlues [", "]ND\n", mpCffLocal->maOtherBlues);
rEmitter.emitValVector( "/FamilyBlues [", "]ND\n", mpCffLocal->maFamilyBlues);
rEmitter.emitValVector( "/FamilyOtherBlues [", "]ND\n", mpCffLocal->maFamilyOtherBlues);
if( mpCffLocal->mfBlueScale) {
pOut += sprintf( pOut, "/BlueScale ");
pOut += dbl2str( pOut, mpCffLocal->mfBlueScale);
pOut += sprintf( pOut, " def\n");
}
if( mpCffLocal->mfBlueShift) { // default BlueShift==7
pOut += sprintf( pOut, "/BlueShift ");
pOut += dbl2str( pOut, mpCffLocal->mfBlueShift);
pOut += sprintf( pOut, " def\n");
}
if( mpCffLocal->mfBlueFuzz) { // default BlueFuzz==1
pOut += sprintf( pOut, "/BlueFuzz ");
pOut += dbl2str( pOut, mpCffLocal->mfBlueFuzz);
pOut += sprintf( pOut, " def\n");
}
// emit stem hint related privdict entries
if( mpCffLocal->maStemStdHW) {
pOut += sprintf( pOut, "/StdHW [");
pOut += dbl2str( pOut, mpCffLocal->maStemStdHW);
pOut += sprintf( pOut, "] def\n");
}
if( mpCffLocal->maStemStdVW) {
pOut += sprintf( pOut, "/StdVW [");
pOut += dbl2str( pOut, mpCffLocal->maStemStdVW);
pOut += sprintf( pOut, "] def\n");
}
rEmitter.emitValVector( "/StemSnapH [", "]ND\n", mpCffLocal->maStemSnapH);
rEmitter.emitValVector( "/StemSnapV [", "]ND\n", mpCffLocal->maStemSnapV);
// emit other hints
if( mpCffLocal->mbForceBold)
pOut += sprintf( pOut, "/ForceBold true def\n");
if( mpCffLocal->mnLangGroup != 0)
pOut += sprintf( pOut, "/LanguageGroup %d def\n", mpCffLocal->mnLangGroup);
if( mpCffLocal->mnLangGroup == 1) // compatibility with ancient printers
pOut += sprintf( pOut, "/RndStemUp false def\n");
if( mpCffLocal->mfExpFactor) {
pOut += sprintf( pOut, "/ExpansionFactor ");
pOut += dbl2str( pOut, mpCffLocal->mfExpFactor);
pOut += sprintf( pOut, " def\n");
}
// emit remaining privdict entries
pOut += sprintf( pOut, "/UniqueID %d def\n", nUniqueId);
// TODO?: more privdict entries?
static const char aOtherSubrs[] =
"/OtherSubrs\n"
"% Dummy code for faking flex hints\n"
"[ {} {} {} {systemdict /internaldict known not {pop 3}\n"
"{1183615869 systemdict /internaldict get exec\n"
"dup /startlock known\n"
"{/startlock get exec}\n"
"{dup /strtlck known\n"
"{/strtlck get exec}\n"
"{pop 3}\nifelse}\nifelse}\nifelse\n} executeonly\n"
"] ND\n";
memcpy( pOut, aOtherSubrs, sizeof(aOtherSubrs)-1);
pOut += sizeof(aOtherSubrs)-1;
// emit used GlobalSubr charstrings
// these are the just the default subrs
// TODO: do we need them as the flex hints are resolved differently?
static const char aSubrs[] =
"/Subrs 5 array\n"
"dup 0 15 RD \x5F\x3D\x6B\xAC\x3C\xBD\x74\x3D\x3E\x17\xA0\x86\x58\x08\x85 NP\n"
"dup 1 9 RD \x5F\x3D\x6B\xD8\xA6\xB5\x68\xB6\xA2 NP\n"
"dup 2 9 RD \x5F\x3D\x6B\xAC\x39\x46\xB9\x43\xF9 NP\n"
"dup 3 5 RD \x5F\x3D\x6B\xAC\xB9 NP\n"
"dup 4 12 RD \x5F\x3D\x6B\xAC\x3E\x5D\x48\x54\x62\x76\x39\x03 NP\n"
"ND\n";
memcpy( pOut, aSubrs, sizeof(aSubrs)-1);
pOut += sizeof(aSubrs)-1;
// TODO: emit more GlobalSubr charstrings?
// TODO: emit used LocalSubr charstrings?
// emit the CharStrings for the requested glyphs
pOut += sprintf( pOut,
"2 index /CharStrings %d dict dup begin\n", nGlyphCount);
rEmitter.emitAllCrypted();
for( int i = 0; i < nGlyphCount; ++i) {
const int nCffGlyphId = pReqGlyphIds[i];
assert( (nCffGlyphId >= 0) && (nCffGlyphId < mnCharStrCount));
// get privdict context matching to the glyph
const int nFDSelect = getFDSelect( nCffGlyphId);
if( nFDSelect < 0)
continue;
mpCffLocal = &maCffLocal[ nFDSelect];
// convert the Type2op charstring to its Type1op counterpart
const int nT2Len = seekIndexData( mnCharStrBase, nCffGlyphId);
assert( nT2Len > 0);
U8 aType1Ops[ MAX_T1OPS_SIZE]; // TODO: dynamic allocation
const int nT1Len = convert2Type1Ops( mpCffLocal, mpReadPtr, nT2Len, aType1Ops);
// get the glyph name
const char* pGlyphName = getGlyphName( nCffGlyphId);
// emit the encrypted Type1op charstring
pOut += sprintf( pOut, "/%s %d RD ", pGlyphName, nT1Len);
memcpy( pOut, aType1Ops, nT1Len);
pOut += nT1Len;
pOut += sprintf( pOut, " ND\n");
rEmitter.emitAllCrypted();
// provide individual glyphwidths if requested
if( pGlyphWidths ) {
ValType aCharWidth = getCharWidth();
if( maFontMatrix.size() >= 4)
aCharWidth *= 1000.0F * maFontMatrix[0];
pGlyphWidths[i] = static_cast<GlyphWidth>(aCharWidth);
}
}
pOut += sprintf( pOut, "end end\nreadonly put\nput\n");
pOut += sprintf( pOut, "dup/FontName get exch definefont pop\n");
pOut += sprintf( pOut, "mark currentfile closefile\n");
rEmitter.emitAllCrypted();
// mark stop of eexec encryption
if( rEmitter.mbPfbSubset) {
const int nEExecLen = rEmitter.tellPos() - nEExecSegTell;
rEmitter.updateLen( nEExecSegTell-4, nEExecLen);
}
// create PFB footer
static const char aPfxFooter[] = "\x80\x01\x14\x02\x00\x00\n" // TODO: check segment len
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"0000000000000000000000000000000000000000000000000000000000000000\n"
"cleartomark\n"
"\x80\x03";
if( rEmitter.mbPfbSubset)
rEmitter.emitRawData( aPfxFooter, sizeof(aPfxFooter)-1);
else
rEmitter.emitRawData( aPfxFooter+6, sizeof(aPfxFooter)-9);
// provide details to the subset requesters, TODO: move into own method?
// note: Top and Bottom are flipped between Type1 and VCL
// note: the rest of VCL expects the details below to be scaled like for an emUnits==1000 font
ValType fXFactor = 1.0;
ValType fYFactor = 1.0;
if( maFontMatrix.size() >= 4) {
fXFactor = 1000.0F * maFontMatrix[0];
fYFactor = 1000.0F * maFontMatrix[3];
}
rFSInfo.m_aFontBBox = tools::Rectangle( Point( static_cast<sal_Int32>(maFontBBox[0] * fXFactor),
static_cast<sal_Int32>(maFontBBox[1] * fYFactor) ),
Point( static_cast<sal_Int32>(maFontBBox[2] * fXFactor),
static_cast<sal_Int32>(maFontBBox[3] * fYFactor) ) );
// PDF-Spec says the values below mean the ink bounds!
// TODO: use better approximations for these ink bounds
rFSInfo.m_nAscent = +rFSInfo.m_aFontBBox.Bottom(); // for capital letters
rFSInfo.m_nDescent = -rFSInfo.m_aFontBBox.Top(); // for all letters
rFSInfo.m_nCapHeight = rFSInfo.m_nAscent; // for top-flat capital letters
rFSInfo.m_nFontType = rEmitter.mbPfbSubset ? FontType::TYPE1_PFB : FontType::TYPE1_PFA;
rFSInfo.m_aPSName = OUString( rEmitter.maSubsetName, strlen(rEmitter.maSubsetName), RTL_TEXTENCODING_UTF8 );
}
bool FontSubsetInfo::CreateFontSubsetFromCff( GlyphWidth* pOutGlyphWidths )
{
CffSubsetterContext aCff( mpInFontBytes, mnInByteLength);
bool bRC = aCff.initialCffRead();
if (!bRC)
return bRC;
// emit Type1 subset from the CFF input
// TODO: also support CFF->CFF subsetting (when PDF-export and PS-printing need it)
const bool bPfbSubset(mnReqFontTypeMask & FontType::TYPE1_PFB);
Type1Emitter aType1Emitter( mpOutFile, bPfbSubset);
aType1Emitter.setSubsetName( mpReqFontName);
aCff.emitAsType1( aType1Emitter,
mpReqGlyphIds, mpReqEncodedIds,
pOutGlyphWidths, mnReqGlyphCount, *this);
return true;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
↑ V560 A part of conditional expression is always true: (nType2Op <= 255).
↑ V507 Pointer to local array 'aType1Ops' is stored outside the scope of this array. Such a pointer will become invalid.
↑ V547 Expression 'nCurrPos >= 0' is always true.