/// <summary>
/// This will parse a kern pair from the data stream.
/// </summary>
/// <returns>The kern pair that was parsed from the stream.</returns>
/// <exception cref="IOException">If there is an error reading from the stream.</exception>
private KernPair ParseKernPair()
{
KernPair kernPair = null;
string cmd = ReadString();
if (KERN_PAIR_KP.Equals(cmd))
{
kernPair = new KernPair {
FirstKernCharacter = ReadString(),
SecondKernCharacter = ReadString(),
X = ReadFloat(),
Y = ReadFloat()
};
}
else if (KERN_PAIR_KPH.Equals(cmd))
{
kernPair = new KernPair {
FirstKernCharacter = HexToString(ReadString()),
SecondKernCharacter = HexToString(ReadString()),
X = ReadFloat(),
Y = ReadFloat()
};
}
else if (KERN_PAIR_KPX.Equals(cmd))
{
kernPair = new KernPair {
FirstKernCharacter = ReadString(),
SecondKernCharacter = ReadString(),
X = ReadFloat(),
Y = 0
};
}
else if (KERN_PAIR_KPY.Equals(cmd))
{
kernPair = new KernPair {
FirstKernCharacter = ReadString(),
SecondKernCharacter = ReadString(),
X = 0,
Y = ReadFloat()
};
}
else
{
throw new IOException("Error expected kern pair command actual='" + cmd + "'");
}
return(kernPair);
}
/// <summary>
/// This will parse the kern data.
/// </summary>
/// <param name="fontMetrics">The metrics class to put the parsed data into.</param>
/// <exception cref="IOException">If there is an error parsing the data.</exception>
private void ParseKernData(FontMetrics fontMetrics)
{
string nextCommand;
while (!(nextCommand = ReadString()).Equals(END_KERN_DATA))
{
if (START_TRACK_KERN.Equals(nextCommand))
{
int count = ReadInt();
for (int i = 0; i < count; i++)
{
fontMetrics.AddTrackKern(new TrackKern {
Degree = ReadInt(),
MinPointSize = ReadFloat(),
MinKern = ReadFloat(),
MaxPointSize = ReadFloat(),
MaxKern = ReadFloat()
});
}
string end = ReadString();
if (!end.Equals(END_TRACK_KERN))
{
throw new IOException("Error: Expected '" + END_TRACK_KERN + "' actual '" + end + "'");
}
}
else if (START_KERN_PAIRS.Equals(nextCommand))
{
int count = ReadInt();
for (int i = 0; i < count; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair(pair);
}
String end = ReadString();
if (!end.Equals(END_KERN_PAIRS))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" + end + "'");
}
}
else if (START_KERN_PAIRS0.Equals(nextCommand))
{
int count = ReadInt();
for (int i = 0; i < count; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair0(pair);
}
string end = ReadString();
if (!end.Equals(END_KERN_PAIRS))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" + end + "'");
}
}
else if (START_KERN_PAIRS1.Equals(nextCommand))
{
int count = ReadInt();
for (int i = 0; i < count; i++)
{
KernPair pair = ParseKernPair();
fontMetrics.AddKernPair1(pair);
}
string end = ReadString();
if (!end.Equals(END_KERN_PAIRS))
{
throw new IOException("Error: Expected '" + END_KERN_PAIRS + "' actual '" + end + "'");
}
}
else
{
throw new IOException("Unknown kerning data type '" + nextCommand + "'");
}
}
}
