internal void Run(IGlyphTranslator tx, Cff1Font cff1Font, Type2GlyphInstructionList instructionList, float scale = 1)
{
//all fields are set to new values***
_cff1Font = cff1Font;
_scale = scale;
//-------------
//from Technical Note #5176 (CFF spec)
//resolve with bias
//Card16 bias;
//Card16 nSubrs = subrINDEX.count;
//if (CharstringType == 1)
// bias = 0;
//else if (nSubrs < 1240)
// bias = 107;
//else if (nSubrs < 33900)
// bias = 1131;
//else
// bias = 32768;
//find local subroutine
int nsubrs = cff1Font._localSubrs.Count;
_cffBias = (nsubrs < 1240) ? 107 :
(nsubrs < 33900) ? 1131 : 32769; //TODO: review 32769 or 32768
//
double currentX = 0, currentY = 0;
var scaleTx = new PxScaleGlyphTx(scale, tx);
//
scaleTx.BeginRead(0);//unknown contour count
//
Run(scaleTx, instructionList, ref currentX, ref currentY);
//
//
//some cff end without closing the latest contour?
if (scaleTx.IsContourOpened)
{
scaleTx.CloseContour();
}
scaleTx.EndRead();
}
void Run(IGlyphTranslator tx, Type2GlyphInstructionList instructionList, ref double currentX, ref double currentY)
{
//recursive ***
Type2EvaluationStack evalStack = GetFreeEvalStack(); //**
evalStack._currentX = currentX;
evalStack._currentY = currentY;
List <Type2Instruction> insts = instructionList.Insts;
evalStack.GlyphTranslator = tx;
int j = insts.Count;
for (int i = 0; i < j; ++i)
{
Type2Instruction inst = insts[i];
//if (inst.Op != OperatorName.LoadInt)
//{
//}
switch (inst.Op)
{
default: throw new NotSupportedException();
case OperatorName.GlyphWidth:
//TODO:
break;
case OperatorName.LoadInt:
evalStack.Push(inst.Value);
break; //
case OperatorName.endchar:
evalStack.EndChar();
break;
case OperatorName.flex: evalStack.Flex(); break;
case OperatorName.hflex: evalStack.H_Flex(); break;
case OperatorName.hflex1: evalStack.H_Flex1(); break;
case OperatorName.flex1: evalStack.Flex1(); break;
//-------------------------
//4.4: Arithmetic Operators
case OperatorName.abs: evalStack.Op_Abs(); break;
case OperatorName.add: evalStack.Op_Add(); break;
case OperatorName.sub: evalStack.Op_Sub(); break;
case OperatorName.div: evalStack.Op_Div(); break;
case OperatorName.neg: evalStack.Op_Neg(); break;
case OperatorName.random: evalStack.Op_Random(); break;
case OperatorName.mul: evalStack.Op_Mul(); break;
case OperatorName.sqrt: evalStack.Op_Sqrt(); break;
case OperatorName.drop: evalStack.Op_Drop(); break;
case OperatorName.exch: evalStack.Op_Exch(); break;
case OperatorName.index: evalStack.Op_Index(); break;
case OperatorName.roll: evalStack.Op_Roll(); break;
case OperatorName.dup: evalStack.Op_Dup(); break;
//-------------------------
//4.5: Storage Operators
case OperatorName.put: evalStack.Put(); break;
case OperatorName.get: evalStack.Get(); break;
//-------------------------
//4.6: Conditional
case OperatorName.and: evalStack.Op_And(); break;
case OperatorName.or: evalStack.Op_Or(); break;
case OperatorName.not: evalStack.Op_Not(); break;
case OperatorName.eq: evalStack.Op_Eq(); break;
case OperatorName.ifelse: evalStack.Op_IfElse(); break;
//
case OperatorName.rlineto: evalStack.R_LineTo(); break;
case OperatorName.hlineto: evalStack.H_LineTo(); break;
case OperatorName.vlineto: evalStack.V_LineTo(); break;
case OperatorName.rrcurveto: evalStack.RR_CurveTo(); break;
case OperatorName.hhcurveto: evalStack.HH_CurveTo(); break;
case OperatorName.hvcurveto: evalStack.HV_CurveTo(); break;
case OperatorName.rcurveline: evalStack.R_CurveLine(); break;
case OperatorName.rlinecurve: evalStack.R_LineCurve(); break;
case OperatorName.vhcurveto: evalStack.VH_CurveTo(); break;
case OperatorName.vvcurveto: evalStack.VV_CurveTo(); break;
//-------------------------------------------------------------------
case OperatorName.rmoveto: evalStack.R_MoveTo(); break;
case OperatorName.hmoveto: evalStack.H_MoveTo(); break;
case OperatorName.vmoveto: evalStack.V_MoveTo(); break;
//-------------------------------------------------------------------
//4.3 Hint Operators
case OperatorName.hstem: evalStack.H_Stem(); break;
case OperatorName.vstem: evalStack.V_Stem(); break;
case OperatorName.vstemhm: evalStack.V_StemHM(); break;
case OperatorName.hstemhm: evalStack.H_StemHM(); break;
//--------------------------
case OperatorName.hintmask1: evalStack.HintMask1(inst.Value); break;
case OperatorName.hintmask2: evalStack.HintMask2(inst.Value); break;
case OperatorName.hintmask3: evalStack.HintMask3(inst.Value); break;
case OperatorName.hintmask4: evalStack.HintMask4(inst.Value); break;
case OperatorName.hintmask_bits: evalStack.HintMaskBits(inst.Value); break;
//------------------------------
case OperatorName.cntrmask1: evalStack.CounterSpaceMask1(inst.Value); break;
case OperatorName.cntrmask2: evalStack.CounterSpaceMask2(inst.Value); break;
case OperatorName.cntrmask3: evalStack.CounterSpaceMask3(inst.Value); break;
case OperatorName.cntrmask4: evalStack.CounterSpaceMask4(inst.Value); break;
case OperatorName.cntrmask_bits: evalStack.CounterSpaceMaskBits(inst.Value); break;
//-------------------------
//4.7: Subroutine Operators
case OperatorName._return:
{
//***
//don't forget to return _evalStack's currentX, currentY to prev evl context
currentX = evalStack._currentX;
currentY = evalStack._currentY;
evalStack.Ret();
}
break;
case OperatorName.callsubr:
{
//resolve local subrountine
int rawSubRoutineNum = (int)evalStack.Pop();
Type2GlyphInstructionList resolvedSubroutine = _cff1Font._localSubrs[rawSubRoutineNum + _cffBias];
//then we move to another context
//recursive ***
Run(tx, resolvedSubroutine, ref evalStack._currentX, ref evalStack._currentY);
}
break;
case OperatorName.callgsubr: throw new NotSupportedException();
}
}
ReleaseEvalStack(evalStack);//****
}
public Type2GlyphInstructionList ParseType2CharString(byte[] buffer)
{
//reset
current_int_count = 0;
foundSomeStem = false;
doStemCount = true;
_msBuffer.SetLength(0);
_msBuffer.Position = 0;
_msBuffer.Write(buffer, 0, buffer.Length);
_msBuffer.Position = 0;
int len = buffer.Length;
//
insts = new Type2GlyphInstructionList();
#if DEBUG
insts.dbugMark = _dbugInstructionListMark;
//if (_dbugInstructionListMark == 5)
//{
//}
_dbugInstructionListMark++;
#endif
byte b0 = 0;
int hintStemCount = 0;
bool cont = true;
while (cont && _reader.BaseStream.Position < len)
{
b0 = _reader.ReadByte();
#if DEBUG
//easy for debugging here
_dbugCount++;
if (b0 < 32)
{
}
#endif
switch (b0)
{
default: //else 32 -255
{
if (b0 < 32)
{
Debug.WriteLine("err!:" + b0);
return(null);
}
insts.AddInt(ReadIntegerNumber(b0));
if (doStemCount)
{
current_int_count++;
}
}
break;
case (byte)Type2Operator1.shortint: // 28
//shortint
//First byte of a 3-byte sequence specifying a number.
//a ShortInt value is specified by using the operator (28) followed by two bytes
//which represent numbers between –32768 and + 32767.The
//most significant byte follows the(28)
byte s_b0 = _reader.ReadByte();
byte s_b1 = _reader.ReadByte();
insts.AddInt((short)((s_b0 << 8) | (s_b1)));
//
if (doStemCount)
{
current_int_count++;
}
break;
//---------------------------------------------------
case (byte)Type2Operator1._Reserved0_: //???
case (byte)Type2Operator1._Reserved2_: //???
case (byte)Type2Operator1._Reserved9_: //???
case (byte)Type2Operator1._Reserved13_: //???
case (byte)Type2Operator1._Reserved15_: //???
case (byte)Type2Operator1._Reserved16_: //???
case (byte)Type2Operator1._Reserved17_: //???
//reserved, do nothing ?
break;
case (byte)Type2Operator1.endchar:
insts.AddOp(OperatorName.endchar);
cont = false;
//when we found end char
//stop reading this...
break;
case (byte)Type2Operator1.escape: //12
{
b0 = _reader.ReadByte();
switch ((Type2Operator2)b0)
{
default:
if (b0 <= 38)
{
Debug.WriteLine("err!:" + b0);
return(null);
}
break;
//-------------------------
//4.1: Path Construction Operators
case Type2Operator2.flex: insts.AddOp(OperatorName.flex); break;
case Type2Operator2.hflex: insts.AddOp(OperatorName.hflex); break;
case Type2Operator2.hflex1: insts.AddOp(OperatorName.hflex1); break;
case Type2Operator2.flex1: insts.AddOp(OperatorName.flex1);; break;
//-------------------------
//4.4: Arithmetic Operators
case Type2Operator2.abs: insts.AddOp(OperatorName.abs); break;
case Type2Operator2.add: insts.AddOp(OperatorName.add); break;
case Type2Operator2.sub: insts.AddOp(OperatorName.sub); break;
case Type2Operator2.div: insts.AddOp(OperatorName.div); break;
case Type2Operator2.neg: insts.AddOp(OperatorName.neg); break;
case Type2Operator2.random: insts.AddOp(OperatorName.random); break;
case Type2Operator2.mul: insts.AddOp(OperatorName.mul); break;
case Type2Operator2.sqrt: insts.AddOp(OperatorName.sqrt); break;
case Type2Operator2.drop: insts.AddOp(OperatorName.drop); break;
case Type2Operator2.exch: insts.AddOp(OperatorName.exch); break;
case Type2Operator2.index: insts.AddOp(OperatorName.index); break;
case Type2Operator2.roll: insts.AddOp(OperatorName.roll); break;
case Type2Operator2.dup: insts.AddOp(OperatorName.dup); break;
//-------------------------
//4.5: Storage Operators
case Type2Operator2.put: insts.AddOp(OperatorName.put); break;
case Type2Operator2.get: insts.AddOp(OperatorName.get); break;
//-------------------------
//4.6: Conditional
case Type2Operator2.and: insts.AddOp(OperatorName.and); break;
case Type2Operator2.or: insts.AddOp(OperatorName.or); break;
case Type2Operator2.not: insts.AddOp(OperatorName.not); break;
case Type2Operator2.eq: insts.AddOp(OperatorName.eq); break;
case Type2Operator2.ifelse: insts.AddOp(OperatorName.ifelse); break;
}
StopStemCount();
}
break;
case (byte)Type2Operator1.rmoveto: insts.AddOp(OperatorName.rmoveto); StopStemCount(); break;
case (byte)Type2Operator1.hmoveto: insts.AddOp(OperatorName.hmoveto); StopStemCount(); break;
case (byte)Type2Operator1.vmoveto: insts.AddOp(OperatorName.vmoveto); StopStemCount(); break;
//---------------------------------------------------------------------------
case (byte)Type2Operator1.rlineto: insts.AddOp(OperatorName.rlineto); StopStemCount(); break;
case (byte)Type2Operator1.hlineto: insts.AddOp(OperatorName.hlineto); StopStemCount(); break;
case (byte)Type2Operator1.vlineto: insts.AddOp(OperatorName.vlineto); StopStemCount(); break;
case (byte)Type2Operator1.rrcurveto: insts.AddOp(OperatorName.rrcurveto); StopStemCount(); break;
case (byte)Type2Operator1.hhcurveto: insts.AddOp(OperatorName.hhcurveto); StopStemCount(); break;
case (byte)Type2Operator1.hvcurveto: insts.AddOp(OperatorName.hvcurveto); StopStemCount(); break;
case (byte)Type2Operator1.rcurveline: insts.AddOp(OperatorName.rcurveline); StopStemCount(); break;
case (byte)Type2Operator1.rlinecurve: insts.AddOp(OperatorName.rlinecurve); StopStemCount(); break;
case (byte)Type2Operator1.vhcurveto: insts.AddOp(OperatorName.vhcurveto); StopStemCount(); break;
case (byte)Type2Operator1.vvcurveto: insts.AddOp(OperatorName.vvcurveto); StopStemCount(); break;
//-------------------------------------------------------------------
//4.3 Hint Operators
case (byte)Type2Operator1.hstem: AddStemToList(OperatorName.hstem, ref hintStemCount); break;
case (byte)Type2Operator1.vstem: AddStemToList(OperatorName.vstem, ref hintStemCount); break;
case (byte)Type2Operator1.vstemhm: AddStemToList(OperatorName.vstemhm, ref hintStemCount); break;
case (byte)Type2Operator1.hstemhm: AddStemToList(OperatorName.hstemhm, ref hintStemCount); break;
//-------------------------------------------------------------------
case (byte)Type2Operator1.hintmask: AddHintMaskToList(_reader, ref hintStemCount); StopStemCount(); break;
case (byte)Type2Operator1.cntrmask: AddCounterMaskToList(_reader, ref hintStemCount); StopStemCount(); break;
//-------------------------------------------------------------------
//4.7: Subroutine Operators
case (byte)Type2Operator1.callsubr: insts.AddOp(OperatorName.callsubr); StopStemCount(); break;
case (byte)Type2Operator1.callgsubr: insts.AddOp(OperatorName.callgsubr); StopStemCount(); break;
case (byte)Type2Operator1._return: insts.AddOp(OperatorName._return); StopStemCount(); break;
}
}
return(insts);
}
