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MOpenFontTrueTypeExtension Class Reference

class MOpenFontTrueTypeExtension

TrueType extension for Open Fonts.

If an open font is able to load TrueType or OpenType tables it should derive from this class.

This class will be used by

This interface should be returned by the overridden COpenFont::ExtendedInterface function when KUidOpenFontTrueTypeExtension is supplied as the UID. KUidOpenFontTrueTypeExtension

Public Member Functions
TAny *	GetTrueTypeTable ( TInt &, TUint32 , TInt *)
TBool	HasTrueTypeTable ( TUint32 )
TInt	ReleaseTrueTypeTable ( TAny *)

Member Functions Documentation

GetTrueTypeTable(TInt &, TUint32, TInt *)

TAny *	GetTrueTypeTable	(	TInt &	aError,
			TUint32	aTag,
			TInt *	aLength
		)	[pure virtual]

Returns the specified table. The table need not be released by the caller, so the deriver is responsible for ensuring that any memory allocated is ultimately cleaned up. The caller must not delete or modify the data returned. ReleaseTrueTypeTable

Parameters

TInt & aError	Returns KErrNone if successful or one of the system-wide error codes if unsuccessful. Returns KErrNotSupported if the table does not exist in the font file.
TUint32 aTag	The tag of the table, with the first character in the most significant byte. For example, the "vhea" table is obtained by passing in 'v'<<24 \| 'h'<<16 \| 'e'<<8 \| 'a'.
TInt * aLength	The length of the table in bytes that has been returned or 0 if unsuccessful.

HasTrueTypeTable(TUint32)

TBool

HasTrueTypeTable

(

TUint32

aTag

)

[pure virtual]

Determines if the font file has a particular table. GetTrueTypeTable

Parameters

TUint32 aTag

The tag of the table as for GetTrueTypeTable.

ReleaseTrueTypeTable(TAny *)

TInt

ReleaseTrueTypeTable

(

TAny *

aTable

)

[pure virtual]

Releases a table obtained by GetTrueTypeTable. The caller must not use the table after this call. GetTrueTypeTable

Parameters

TAny * aTable

The table to be released.