#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 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_Glyph 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 float Render( const FT_Vector& pen);
private:
/**
* Pointer to the 'image' data
*/
unsigned char* data;
/**
* The width of the glyph 'image'
*/
int destWidth;
/**
* The height of the glyph 'image'
*/
int destHeight;
/**
* The number of greys or bit depth of the image
*/
int numGreys;
/**
* A structure to hold the uv co-ords.
*/
struct FTPoint
{
float x;
float y;
};
/**
* 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 call glGetIntegerv( GL_TEXTURE_2D_BINDING, activeTextureID);
* to get the currently active texture to try to reduce the number
* of texture bind operations
*/
GLint activeTextureID;
};
#endif // __FTTextureGlyph__
