public static void Run(Type1BuildCharContext context)
{
var index = (int)context.Stack.PopTop();
// What it should do
var numberOfArguments = (int)context.Stack.PopTop();
var otherSubroutineArguments = new List <decimal>(numberOfArguments);
for (int j = 0; j < numberOfArguments; j++)
{
otherSubroutineArguments.Add(context.Stack.PopTop());
}
switch (index)
{
// Other subrs 0-2 implement flex
case FlexEnd:
{
context.IsFlexing = false;
if (context.FlexPoints.Count < 7)
{
throw new NotSupportedException("There must be at least 7 flex points defined by an other subroutine.");
}
context.ClearFlexPoints();
break;
}
case FlexBegin:
Debug.Assert(otherSubroutineArguments.Count == 0, "Flex begin should have no arguments.");
context.PostscriptStack.Clear();
context.PostscriptStack.Push(context.CurrentPosition.X);
context.PostscriptStack.Push(context.CurrentPosition.Y);
context.IsFlexing = true;
break;
case FlexMiddle:
Debug.Assert(otherSubroutineArguments.Count == 0, "Flex middle should have no arguments.");
context.PostscriptStack.Push(context.CurrentPosition.X);
context.PostscriptStack.Push(context.CurrentPosition.Y);
break;
// Other subrs 3 implements hint replacement
case HintReplacement:
if (otherSubroutineArguments.Count != 1)
{
throw new InvalidOperationException("The hint replacement subroutine only takes a single argument.");
}
context.PostscriptStack.Clear();
context.PostscriptStack.Push(otherSubroutineArguments[0]);
break;
default:
// Other subrs beyond the first 4 can safely be ignored.
context.PostscriptStack.Clear();
for (var i = 0; i < otherSubroutineArguments.Count; i++)
{
context.PostscriptStack.Push(otherSubroutineArguments[i]);
}
break;
}
}
public static void Run(Type1BuildCharContext context)
{
var index = (int)context.Stack.PopTop();
// What it should do
var numberOfArguments = (int)context.Stack.PopTop();
var otherSubroutineArguments = new List<double>(numberOfArguments);
for (int j = 0; j < numberOfArguments; j++)
{
otherSubroutineArguments.Add(context.Stack.PopTop());
}
switch (index)
{
// Other subrs 0-2 implement flex
case FlexEnd:
{
// https://github.com/apache/pdfbox/blob/2c23d8b4e3ad61852f0b6ee2b95b907eefba1fcf/fontbox/src/main/java/org/apache/fontbox/cff/Type1CharString.java#L339
context.IsFlexing = false;
if (context.FlexPoints.Count < 7)
{
throw new NotSupportedException("There must be at least 7 flex points defined by an other subroutine.");
}
// reference point is relative to start point
PdfPoint reference = context.FlexPoints[0];
reference = reference.Translate(context.CurrentPosition.X, context.CurrentPosition.Y);
// first point is relative to reference point
PdfPoint first = context.FlexPoints[1];
first = first.Translate(reference.X, reference.Y);
// make the first point relative to the start point
first = first.Translate(-context.CurrentPosition.X, -context.CurrentPosition.Y);
context.Stack.Push(first.X);
context.Stack.Push(first.Y);
context.Stack.Push(context.FlexPoints[2].X);
context.Stack.Push(context.FlexPoints[2].Y);
context.Stack.Push(context.FlexPoints[3].X);
context.Stack.Push(context.FlexPoints[3].Y);
RelativeRCurveToCommand.Run(context);
context.Stack.Push(context.FlexPoints[4].X);
context.Stack.Push(context.FlexPoints[4].Y);
context.Stack.Push(context.FlexPoints[5].X);
context.Stack.Push(context.FlexPoints[5].Y);
context.Stack.Push(context.FlexPoints[6].X);
context.Stack.Push(context.FlexPoints[6].Y);
RelativeRCurveToCommand.Run(context);
context.ClearFlexPoints();
break;
}
case FlexBegin:
Debug.Assert(otherSubroutineArguments.Count == 0, "Flex begin should have no arguments.");
context.PostscriptStack.Clear();
context.PostscriptStack.Push(context.CurrentPosition.X);
context.PostscriptStack.Push(context.CurrentPosition.Y);
context.IsFlexing = true;
break;
case FlexMiddle:
Debug.Assert(otherSubroutineArguments.Count == 0, "Flex middle should have no arguments.");
context.PostscriptStack.Push(context.CurrentPosition.X);
context.PostscriptStack.Push(context.CurrentPosition.Y);
break;
// Other subrs 3 implements hint replacement
case HintReplacement:
if (otherSubroutineArguments.Count != 1)
{
throw new InvalidOperationException("The hint replacement subroutine only takes a single argument.");
}
context.PostscriptStack.Clear();
context.PostscriptStack.Push(otherSubroutineArguments[0]);
break;
default:
// Other subrs beyond the first 4 can safely be ignored.
context.PostscriptStack.Clear();
for (var i = 0; i < otherSubroutineArguments.Count; i++)
{
context.PostscriptStack.Push(otherSubroutineArguments[i]);
}
break;
}
}