#ifndef __FTFace__
#define __FTFace__
#include "FTGL.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include "FTPoint.h"
#include "FTSize.h"
class FTCharmap;
/**
* FTFace class provides an abstraction layer for the Freetype Face.
*
* @see "Freetype 2 Documentation"
*
*/
class FTGL_EXPORT FTFace
{
public:
/**
* Opens and reads a face file. Error is set.
*
* @param filename font file name.
*/
FTFace( const char* filename);
/**
* Read face data from an in-memory buffer. Error is set.
*
* @param pBufferBytes the in-memory buffer
* @param bufferSizeInBytes the length of the buffer in bytes
*/
FTFace( const unsigned char *pBufferBytes, size_t bufferSizeInBytes );
/**
* Destructor
*
* Disposes of the current Freetype Face.
*/
virtual ~FTFace();
/**
* Attach auxilliary file to font (e.g., font metrics).
*
* @param filename auxilliary font file name.
* @return <code>true</code> if file has opened
* successfully.
*/
bool Attach( const char* filename);
/**
* Attach auxilliary data to font (e.g., font metrics) from memory
*
* @param pBufferBytes the in-memory buffer
* @param bufferSizeInBytes the length of the buffer in bytes
* @return <code>true</code> if file has opened
* successfully.
*/
bool Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes);
/**
* Disposes of the face
*/
void Close();
void* FontTable( unsigned int tableName) const;
/**
* Sets the char size for the current face.
*
* This doesn't guarantee that the size was set correctly. Clients
* should check errors.
*
* @param size the face size in points (1/72 inch)
* @param res the resolution of the target device.
* @return <code>FTSize</code> object
*/
const FTSize& Size( const unsigned int size, const unsigned int res);
unsigned int UnitsPerEM() const;
/**
* Sets the character map for the face.
*
* This doesn't guarantee that the size was set correctly. Clients
* should check errors.
*
* @param encoding the Freetype encoding symbol. See above.
* @return <code>true</code> if charmap was valid
* and set correctly
*/
bool CharMap( FT_Encoding encoding);
/**
* Get the glyph index of the input character.
*
* @param index The character code of the requested glyph in the
* current encoding eg apple roman.
* @return The glyph index for the character.
*/
unsigned int CharIndex( unsigned int index ) const;
/**
* Gets the kerning vector between two glyphs
*/
FTPoint KernAdvance( unsigned int index1, unsigned int index2);
/**
* Loads and creates a Freetype glyph.
*/
FT_Glyph* Glyph( unsigned int index, FT_Int load_flags);
/**
* Gets the number of glyphs in the current face.
*/
unsigned int GlyphCount() const { return numGlyphs;}
/**
* Queries for errors.
*
* @return The current error code.
*/
FT_Error Error() const { return err; }
private:
/**
* The Freetype face
*/
FT_Face* ftFace;
/**
* The size object associated with this face
*/
FTSize charSize;
/**
* The Character Map object associated with this face
*/
FTCharmap* charMap;
/**
* Temporary variable to hold a glyph
*/
FT_Glyph ftGlyph;
/**
* The number of glyphs in this face
*/
int numGlyphs;
/**
* Current error code. Zero means no error.
*/
FT_Error err;
};
#endif // __FTFace__
