esfont.h

#include <GL/glew.h>
#include <glm/glm.hpp>
#include <ft2build.h>
#include FT_FREETYPE_H

#include "esfontbase.h"

struct Character
{
    GLuint    texture;
    glm::vec3 scale; // scaling factor for the quad
    glm::vec3 v0;    // location of v0 relative to baseline
    float     advance; // amount to advance on the baseline
};

class FreeTypeFont
{
private:
    bool      loaded;
    bool      quad_initialized;
    Character characters[128];
    GLuint    program;
    GLuint    vbo;
    GLuint    vao;
    GLint     mvp_loc;
    GLint     s_texture_loc;
    float     descender;

    void InitQuad(void);
    void DeleteQuad(void);

    void LoadCharacter(
            FT_Library library,
            FT_Face face,
            unsigned char charcode,
            glm::vec4 &fontCol,
            glm::vec4 &outlineCol,
            float outlineWidth );

public:
	FreeTypeFont( void );
    ~FreeTypeFont( );

	void LoadOutline( const char *filename, unsigned int fontsize,
                      glm::vec4 &fontColor, glm::vec4 &outlineColor,
                      float outlineWidth);
    void Free( void );
    void Printf( double x, double y, const char *format, ... );
    float PrintfAdvance(const char *format, ...);
};