font_atlas.h

#ifndef OE_GUI_FONT_ATLAS_H
#define OE_GUI_FONT_ATLAS_H
 
#include <string>
#include <vector>
#include <memory>
#include <glm/vec2.hpp>
 
namespace oe::render
{
    class Texture;
}
 
struct nk_font;
struct nk_font_atlas;
struct nk_draw_null_texture;
 
namespace oe::gui
{
    class FontAtlas
    {
        public:
            FontAtlas();
 
            ~FontAtlas();
 
            void generate();
 
            FontAtlas* addFile(const std::string& font_name, const std::string& font_file, const float& size);
 
            bool isValid() const
            {
                return _tex != nullptr;
            }
 
            size_t getIdFromName(const std::string& font_id) const;
 
            nk_font* getHandle(const size_t& font_id) const
            {
                return std::get<2>(_font_conf.at(font_id).second);
            }
 
            nk_font* getHandle(const std::string& font_id) const;
 
            nk_font* getDefaultFont()
            {
                return _default_font;
            }
 
            const std::unique_ptr<oe::render::Texture>& getTexture()
            {
                return _tex;
            }
 
            glm::vec2 white_pixel_uv = glm::vec2(0.f);
 
        private:
            std::vector<std::pair<std::string, std::tuple<std::string, float, nk_font*>>> _font_conf;
 
            std::unique_ptr<oe::render::Texture> _tex;
            std::unique_ptr<nk_font_atlas> _atlas;
 
            nk_font* _default_font = nullptr;
    };
}
#endif