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101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
#ifndef __FTGlyph__
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#define __FTGlyph__
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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 "FTBBox.h"
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#include "FTPoint.h"
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#include "FTGL.h"
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/**
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* FTGlyph is the base class for FTGL glyphs.
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*
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* It provides the interface between Freetype glyphs and their openGL
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* renderable counterparts. This is an abstract class and derived classes
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* must implement the <code>render</code> function.
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*
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* @see FTGlyphContainer
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* @see FTBBox
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* @see FTPoint
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*
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*/
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class FTGL_EXPORT FTGlyph
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{
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public:
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/**
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* Constructor
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*
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* @param glyph The Freetype glyph to be processed
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* @param useDisplayList Enable or disable the use of Display Lists for this glyph
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* <code>true</code> turns ON display lists.
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* <code>false</code> turns OFF display lists.
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*/
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FTGlyph( FT_GlyphSlot glyph, bool useDisplayList = true);
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/**
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* Destructor
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*/
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virtual ~FTGlyph();
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/**
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* Renders this glyph at the current pen position.
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*
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* @param pen The current pen position.
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* @return The advance distance for this glyph.
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*/
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virtual const FTPoint& Render( const FTPoint& pen) = 0;
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/**
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* Return the advance width for this glyph.
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*
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* @return advance width.
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*/
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const FTPoint& Advance() const { return advance;}
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/**
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* Return the bounding box for this glyph.
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*
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* @return bounding box.
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*/
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const FTBBox& BBox() const { return bBox;}
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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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protected:
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/**
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* The advance distance for this glyph
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*/
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FTPoint advance;
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/**
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* The bounding box of this glyph.
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*/
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FTBBox bBox;
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/**
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* Flag to enable or disable the use of Display Lists inside FTGL
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* <code>true</code> turns ON display lists.
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* <code>false</code> turns OFF display lists.
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*/
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bool useDisplayList;
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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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private:
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};
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#endif // __FTGlyph__
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