Font.hpp

//
// Created by jibbo on 3/12/21.
//
 
#ifndef ENGINE_PROJ_GLYPH_H
#define ENGINE_PROJ_GLYPH_H
 
#include "pch.hpp"
#include "Components.hpp"
#include "MeshRenderer.hpp"
#include "Texture.hpp"
#include "GLTexture.hpp"
#include "ft2build.h"
#include FT_FREETYPE_H
#include "Shader.hpp"
 
namespace Engine {
  struct Glyph : TextureLookup {
    Glyph(const Ref<Texture>& texture, const Ref<TextureMap>& map,
          uint cwidth, uint cheight, int32_t leftShift, int32_t topShift, uint32_t adv):
          TextureLookup(texture, map, cwidth, cheight), left(leftShift), top(topShift), advance(adv) {};
    int left;
    int top;
    uint32_t advance;
  };
 
  //TODO: implement and test
//  struct Text {
//    /// Font storage
//    Ref<Font> font;
//    /// text to render
//    std::string text = "";
//    /// rendering alignment origin
//    TextAlignment alignment = CENTER;
//    /// Mesh rendering link
//    Ref<MeshRenderer> renderer;
//
//    /// generate a Texture Mesh, requires font data and a string
//    void SetText(const std::string &tData, const Ref<Font> &fData = nullptr) {
//      font = fData == nullptr ? font : fData;
//      if (font == nullptr) {
//        std::cerr << "font data cannot be null." << std::endl;
//        return;
//      }
//    }
//  };
 
 
  struct Font {
  public:
    static uint GLYPH_COUNT;
    static FT_Library FT;
    static void InitFont();
    static void FinalizeFonts();
    explicit Font(const char * path);
 
    std::vector<Ref<Glyph>> glyphs;
    bool singleTex = true;
 
    void renderText(const std::string &text,
                    Ref<MeshRenderer> &meshRenderer,
                    Allignment alignment = CENTER,
                    float z = 0);
 
    void renderText(const std::string &text, MeshRenderer* meshRenderer, Allignment alignment = CENTER, float z = 0);
 
  };
}
 
#endif //ENGINE_PROJ_GLYPH_H