public string ValueLabel(UInt16 settingsno, string langid, Encform utf)
{
UInt32 length;
ushort langId = (ushort)Graphite2Api.StrToTag(langid);
IntPtr labelPtr = Graphite2Api.FrefValueLabel(_featureRef, settingsno, ref langId, utf, out length);
string retLabel = ConvertGraphiteLabelToString(labelPtr, utf, length);
Graphite2Api.LabelDestroy(labelPtr);
return retLabel;
}
public string ValueLabel(UInt16 settingsno, string langid, Encform utf)
{
UInt32 length;
ushort langId = (ushort)Graphite2Api.StrToTag(langid);
IntPtr labelPtr = Graphite2Api.FrefValueLabel(_featureRef, settingsno, ref langId, utf, out length);
string retLabel = ConvertGraphiteLabelToString(labelPtr, utf, length);
Graphite2Api.LabelDestroy(labelPtr);
return(retLabel);
}
public string Label(string langid, Encform utf)
{
UInt32 length;
ushort langId = (ushort)Graphite2Api.StrToTag(langid);
IntPtr labelPtr = Graphite2Api.FrefLabel(_featureRef, ref langId, utf, out length);
if (labelPtr == IntPtr.Zero)
return String.Empty;
string retLabel = ConvertGraphiteLabelToString(labelPtr, utf, length);
Graphite2Api.LabelDestroy(labelPtr);
return retLabel;
}
public string Label(string langid, Encform utf)
{
UInt32 length;
ushort langId = (ushort)Graphite2Api.StrToTag(langid);
IntPtr labelPtr = Graphite2Api.FrefLabel(_featureRef, ref langId, utf, out length);
if (labelPtr == IntPtr.Zero)
{
return(String.Empty);
}
string retLabel = ConvertGraphiteLabelToString(labelPtr, utf, length);
Graphite2Api.LabelDestroy(labelPtr);
return(retLabel);
}
protected string ConvertGraphiteLabelToString(IntPtr labelPtr, Encform utf, UInt32 length)
{
switch (utf)
{
case Encform.Utf8:
return(Marshal.PtrToStringAnsi(labelPtr, (int)length));
case Encform.Utf16:
return(Marshal.PtrToStringUni(labelPtr, (int)length));
case Encform.utf32:
// I am assuming that PtrToStringUni only works for utf-16
throw new NotImplementedException("Getting labels as utf32 not supportted");
default:
throw new NotImplementedException("Unknown EncForm");
}
}
protected string ConvertGraphiteLabelToString(IntPtr labelPtr, Encform utf, UInt32 length)
{
switch(utf)
{
case Encform.Utf8:
return Marshal.PtrToStringAnsi(labelPtr, (int)length);
case Encform.Utf16:
return Marshal.PtrToStringUni(labelPtr, (int)length);
case Encform.utf32:
// I am assuming that PtrToStringUni only works for utf-16
throw new NotImplementedException("Getting labels as utf32 not supportted");
default:
throw new NotImplementedException("Unknown EncForm");
}
}
internal static extern /*gr_segment**/ IntPtr MakeSeg(/*gr_font**/ IntPtr font, /*gr_face**/ IntPtr face, UInt32 script, /*gr_feature_val**/ IntPtr pFeats, Encform enc, IntPtr pStart, int nChars, Bidirtl dir);
internal static extern int CountUnicodeCharacters(Encform enc, IntPtr buffer_begin, IntPtr buffer_end, ref IntPtr pError);
internal static extern IntPtr FrefValueLabel(/*gr_feature_ref*/ IntPtr pfeatureref, UInt16 settingsno, ref UInt16 langId, Encform utf, out UInt32 length);
internal static extern IntPtr FrefLabel(/*gr_feature_ref*/ IntPtr pfeatureref, ref UInt16 langid, Encform utf, out UInt32 length);
internal static extern IntPtr MakeSeg(/*gr_font**/IntPtr font, /*gr_face**/IntPtr face, UInt32 script, /*gr_feature_val**/IntPtr pFeats, Encform enc, IntPtr pStart, int nChars, Bidirtl dir);
internal static extern IntPtr FrefValueLabel(/*gr_feature_ref*/ IntPtr pfeatureref, UInt16 settingsno, ref UInt16 langId, Encform utf, out UInt32 length);
internal static extern IntPtr FrefLabel(/*gr_feature_ref*/ IntPtr pfeatureref, ref UInt16 langid, Encform utf, out UInt32 length);
internal static extern int CountUnicodeCharacters(Encform enc, IntPtr buffer_begin, IntPtr buffer_end, ref IntPtr pError);
