void ReleaseEvalStack(Type2EvaluationStack evalStack)
{
evalStack.Reset();
_evalStackPool.Push(evalStack);
}
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);//****
}
