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#ifndef __FTTextureGlyph__
#define __FTTextureGlyph__
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include "FTGL.h"
#include "FTGlyph.h"
/**
* FTTextureGlyph is a specialisation of FTGlyph for creating texture
* glyphs.
*
* @see FTGlyphContainer
*
*/
class FTGL_EXPORT FTTextureGlyph : public FTGlyph
{
public:
/**
* Constructor
*
* @param glyph The Freetype glyph to be processed
* @param id The id of the texture that this glyph will be
* drawn in
* @param xOffset The x offset into the parent texture to draw
* this glyph
* @param yOffset The y offset into the parent texture to draw
* this glyph
* @param width The width of the parent texture
* @param height The height (number of rows) of the parent texture
*/
FTTextureGlyph( FT_GlyphSlot glyph, int id, int xOffset, int yOffset, GLsizei width, GLsizei height);
/**
* Destructor
*/
virtual ~FTTextureGlyph();
/**
* Renders this glyph at the current pen position.
*
* @param pen The current pen position.
* @return The advance distance for this glyph.
*/
virtual const FTPoint& Render( const FTPoint& pen);
/**
* Reset the currently active texture to zero to get into a known state before
* drawing a string. This is to get round possible threading issues.
*/
static void ResetActiveTexture(){ activeTextureID = 0;}
private:
/**
* The width of the glyph 'image'
*/
int destWidth;
/**
* The height of the glyph 'image'
*/
int destHeight;
/**
* Vector from the pen position to the topleft corner of the pixmap
*/
FTPoint pos;
/**
* The texture co-ords of this glyph within the texture.
*/
FTPoint uv[2];
/**
* The texture index that this glyph is contained in.
*/
int glTextureID;
/**
* The texture index of the currently active texture
*
* We keep track of the currently active texture to try to reduce the number
* of texture bind operations.
*/
static GLint activeTextureID;
};
#endif // __FTTextureGlyph__
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