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147 lines
3.8 KiB
C++
147 lines
3.8 KiB
C++
#ifndef __FTFace__
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#define __FTFace__
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_GLYPH_H
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#include "FTGL.h"
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#include "FTPoint.h"
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#include "FTSize.h"
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/**
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* FTFace class provides an abstraction layer for the Freetype Face.
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*
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* @see "Freetype 2 Documentation"
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*
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*/
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class FTGL_EXPORT FTFace
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{
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public:
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/**
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* Opens and reads a face file. Error is set.
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*
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* @param fontFilePath font file path.
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*/
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FTFace( const char* fontFilePath);
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/**
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* Read face data from an in-memory buffer. Error is set.
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*
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* @param pBufferBytes the in-memory buffer
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* @param bufferSizeInBytes the length of the buffer in bytes
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*/
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FTFace( const unsigned char *pBufferBytes, size_t bufferSizeInBytes );
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/**
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* Destructor
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*
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* Disposes of the current Freetype Face.
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*/
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virtual ~FTFace();
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/**
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* Attach auxilliary file to font (e.g., font metrics).
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*
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* @param fontFilePath auxilliary font file path.
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* @return <code>true</code> if file has opened
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* successfully.
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*/
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bool Attach( const char* fontFilePath);
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/**
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* Attach auxilliary data to font (e.g., font metrics) from memory
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*
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* @param pBufferBytes the in-memory buffer
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* @param bufferSizeInBytes the length of the buffer in bytes
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* @return <code>true</code> if file has opened
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* successfully.
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*/
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bool Attach( const unsigned char *pBufferBytes, size_t bufferSizeInBytes);
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/**
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* Get the freetype face object..
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*
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* @return pointer to an FT_Face.
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*/
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FT_Face* Face() const { return ftFace;}
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/**
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* Sets the char size for the current face.
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*
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* This doesn't guarantee that the size was set correctly. Clients
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* should check errors.
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*
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* @param size the face size in points (1/72 inch)
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* @param res the resolution of the target device.
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* @return <code>FTSize</code> object
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*/
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const FTSize& Size( const unsigned int size, const unsigned int res);
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/**
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* Get the number of character maps in this face.
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*
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* @return character map count.
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*/
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unsigned int CharMapCount();
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/**
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* Get a list of character maps in this face.
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*
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* @return pointer to the first encoding.
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*/
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FT_Encoding* CharMapList();
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/**
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* Gets the kerning vector between two glyphs
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*/
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FTPoint KernAdvance( unsigned int index1, unsigned int index2);
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/**
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* Loads and creates a Freetype glyph.
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*/
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FT_GlyphSlot Glyph( unsigned int index, FT_Int load_flags);
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/**
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* Gets the number of glyphs in the current face.
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*/
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unsigned int GlyphCount() const { return numGlyphs;}
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/**
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* Queries for errors.
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*
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* @return The current error code.
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*/
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FT_Error Error() const { return err; }
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private:
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/**
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* The Freetype face
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*/
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FT_Face* ftFace;
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/**
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* The size object associated with this face
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*/
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FTSize charSize;
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/**
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* The number of glyphs in this face
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*/
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int numGlyphs;
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FT_Encoding* fontEncodingList;
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/**
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* This face has kerning tables
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*/
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bool hasKerningTable;
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/**
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* Current error code. Zero means no error.
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*/
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FT_Error err;
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};
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#endif // __FTFace__
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