FontRenderer.h

#ifndef _FONTRENDERER_H_
#define _FONTRENDERER_H_

#include "flextGL33.h"
#include "Mesh.h"
#include "Shader.h"
#include "Renderable.h"
#include "Scene.h"
#include "Shader.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include <unordered_map>
#include <string>

class GlyphDescription
{
public:
    FT_UInt glyphIndex;
    int width, height;
    int bearingX, bearingY;
    int advance;

    int left, top;
};

class GlyphNode
{
public:
    GlyphNode();
    ~GlyphNode();

    GlyphDescription* gd;
    GlyphNode* child[2];
    int left, top, width, height;

    GlyphNode* insert(GlyphDescription* gdInsert);
};

class FaceDescription
{
public:
    std::vector<GlyphDescription>* glyphs;
    GLuint textureHandle;
    int textureWidth, textureHeight;
    std::string fontPath;
    int pixelHeight;
    FT_Face face;
};

class Text
{
public:
    Text();
    ~Text();
    
    void init(const std::string& text, FaceDescription* faceDescr, Scene* scene, Shader* shader);
    virtual void render();
    void setPosition(int pX, int pY);
    void setText(const std::string& text);
    const std::string& getText() const;

private:
    std::string _text;
    FaceDescription* _faceDescr;
    Scene* _scene;
    Mesh* _mesh;
    Shader* _shader;

    int _pX, _pY;
};

class FontRenderer
{
public:
    FontRenderer();
    
    void loadFont(const std::string& fontPath, const std::string& fontName, int pixelHeight);
    void createText(const std::string& text, const std::string& fontName, Scene* scene, Text* textObj);
    void render(Shader* shader);
private:
    FT_Library _ftLibrary;
    std::unordered_map<std::string, FaceDescription> _faces;

    Shader fontShader;
};



#endif