textservice.h

// Note: static renderer must be defined when creating the service class.
class TextService {
  public:
    // Colors has to be defined as an enum, because otherwise
    // they cant be accessed outside class. ('Has to be specific for some object').
    enum class Colors { red = 1, green = 2, blue = 3, yellow = 4, white = 5, gray = 6, black = 7 };

    class TextProperties;    // forward declaration;
    enum class FontNames { ostrich = 1, blabalb = 2 };

  private:
    static TTF_Font* openFont(FontNames font, int);
    static std::map<std::pair<FontNames, int>, TTF_Font*> fonts;
    std::vector<TextProperties*> renderQueue;

  public:
    class TextProperties {    // Nested because this class isn't usable anywhere else.
      private:
        TTF_Font* fontPtr;       // Font enums are only for user, as well as
        SDL_Rect rect;           // x, y cordinates (or SDL_Points),
        SDL_Texture* texture;    // These are actually needed for text creation.

        SDL_Texture* surfaceToTexture(SDL_Surface*);
        void checkValidity();
        SDL_Rect getRect();
        SDL_Texture* getTexture();
        void setRect();
        void setTexture(std::string text, TTF_Font* font, Colors color);
        void setTextPosition(int x, int y);
        void setTextPosition(SDL_Point point);

      public:
        friend class TextService;    // Allow TextProperties to use helper functions from TextService.
        int x;
        int y;
        int size;
        FontNames font;
        Colors color;
        std::string text;

        // The attribute names are intentionally left on place,
        // because they help to percieve the differences between overloads.
        TextProperties();
        TextProperties(std::string text, TextService::FontNames font, int font_size, Colors color, SDL_Point point);
        TextProperties(std::string text, TextService::FontNames font, int font_size, Colors color, int x, int y);
        ~TextProperties();
    };

    TextService();
    ~TextService();
    void render();    // Put this into game main loop and call once.
    void createText(TextService::TextProperties& text);
    void removeText(TextService::TextProperties& text);

    // Text modification functions for user
    void setTextColor(TextService::TextProperties& text, Colors color);
    void setTextPosition(TextService::TextProperties& text, int x, int y);
    void setTextPosition(TextService::TextProperties& text, SDL_Point point);

    FontNames Fonts;  // Available text fonts

    static SDL_Renderer* renderer;  // Static attribute must be public
};