/**
* This will parse a kern pair from the data stream.
*
* @return The kern pair that was parsed from the stream.
*
* @throws IOException If there is an error reading from the stream.
*/
private KernPair ParseKernPair()
{
KernPair kernPair = new KernPair();
string cmd = ReadString();
switch (cmd)
{
case KERN_PAIR_KP:
kernPair.FirstKernCharacter = ReadString();
kernPair.SecondKernCharacter = ReadString();
kernPair.X = Readfloat();
kernPair.Y = Readfloat();
break;
case KERN_PAIR_KPH:
kernPair.FirstKernCharacter = HexTostring(ReadString());
kernPair.SecondKernCharacter = HexTostring(ReadString());
kernPair.X = Readfloat();
kernPair.Y = Readfloat();
break;
case KERN_PAIR_KPX:
kernPair.FirstKernCharacter = ReadString();
kernPair.SecondKernCharacter = ReadString();
kernPair.X = Readfloat();
kernPair.Y = 0;
break;
case KERN_PAIR_KPY:
kernPair.FirstKernCharacter = ReadString();
kernPair.SecondKernCharacter = ReadString();
kernPair.X = 0;
kernPair.Y = Readfloat();
break;
default:
throw new IOException("Error expected kern pair command actual='" + cmd + "'");
}
return(kernPair);
}
/**
* This will parse the kern data.
*
* @param fontMetrics The metrics class to put the parsed data into.
*
* @throws IOException If there is an error parsing the data.
*/
private void ParseKernData(FontMetrics fontMetrics)
{
string nextCommand;
while (!(nextCommand = ReadString()).Equals(END_KERN_DATA, StringComparison.Ordinal))
{
switch (nextCommand)
{
case START_TRACK_KERN:
int countTrackKern = ReadInt();
for (int i = 0; i < countTrackKern; i++)
{
TrackKern kern = new TrackKern();
kern.Degree = ReadInt();
kern.MinPointSize = Readfloat();
kern.MinKern = Readfloat();
kern.MaxPointSize = Readfloat();
kern.MaxKern = Readfloat();
fontMetrics.AddTrackKern(kern);
}
string endTrackKern = ReadString();
if (!endTrackKern.Equals(END_TRACK_KERN, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_TRACK_KERN + "' actual '" +
endTrackKern + "'");
}
break;
case START_KERN_PAIRS:
int countKernPairs = ReadInt();
for (int i = 0; i < countKernPairs; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair(pair);
}
string endKernPairs = ReadString();
if (!endKernPairs.Equals(END_KERN_PAIRS, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" +
endKernPairs + "'");
}
break;
case START_KERN_PAIRS0:
int countKernPairs0 = ReadInt();
for (int i = 0; i < countKernPairs0; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair0(pair);
}
string endKernPairs0 = ReadString();
if (!endKernPairs0.Equals(END_KERN_PAIRS, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" +
endKernPairs0 + "'");
}
break;
case START_KERN_PAIRS1:
int countKernPairs1 = ReadInt();
for (int i = 0; i < countKernPairs1; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair1(pair);
}
string endKernPairs1 = ReadString();
if (!endKernPairs1.Equals(END_KERN_PAIRS, StringComparison.Ordinal))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" +
endKernPairs1 + "'");
}
break;
default:
throw new IOException("Unknown kerning data type '" + nextCommand + "'");
}
}
}
