font.hpp

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#pragma once
 
#include <glad/glad.h>
#include <glm/glm.hpp>
 
#include <unordered_map>
#include <string>
 
#include "../ecs/component.hpp"
#include "../constants.hpp"
 
namespace Engine::UI {
    struct FontChar {
        GLuint textureID = 0;
        glm::ivec2 size;
        glm::ivec2 bearing;
        unsigned int advance;
    };

    class Font {
        private:
            std::unordered_map<char, FontChar> mCharacters;
            std::vector<char> mDataBuffer;
            float mSize;
        
        public:
            Font();

            ~Font();

            Font(const std::string& fontPath, int fontSize = 48);
            Font(const char *buffer, size_t size, int fontSize = 48);

            FontChar GetChar(const char c);
            void SetFontSize(float size);
            float GetFontSize() const;

            void LoadFromFile(const std::string& filePath, int fontSize = 48);
            void LoadFromMemory(const char *buffer, size_t size, int fontSize = 48);
            glm::vec2 GetTextSize(const std::string& text, glm::vec2 scale = glm::vec2(1.0f, 1.0f), float maxWidth = 0.0f);
    };
}