gui_atlas.hpp

#ifndef LXGUI_GUI_ATLAS_HPP
#define LXGUI_GUI_ATLAS_HPP
 
#include "lxgui/gui_bounds2.hpp"
#include "lxgui/gui_material.hpp"
#include "lxgui/lxgui.hpp"
#include "lxgui/utils.hpp"
 
#include <memory>
#include <optional>
#include <string>
#include <unordered_map>
#include <vector>
 
namespace lxgui::gui {
 
class renderer;
class font;
 
class atlas_page {
public:
    explicit atlas_page(material::filter filt);
 
    virtual ~atlas_page() = default;
 
    atlas_page(const atlas_page&) = delete;
 
    atlas_page(atlas_page&&) = delete;
 
    atlas_page& operator=(const atlas_page&) = delete;
 
    atlas_page& operator=(atlas_page&&) = delete;
 
    std::shared_ptr<material> fetch_material(const std::string& file_name) const;
 
    std::shared_ptr<material> add_material(const std::string& file_name, const material& mat);
 
    std::shared_ptr<font> fetch_font(const std::string& font_name) const;
 
    bool add_font(const std::string& font_name, std::shared_ptr<gui::font> fnt);
 
    bool empty() const;
 
protected:
    virtual std::shared_ptr<material>
    add_material_(const material& mat, const bounds2f& location) = 0;
 
    virtual float get_width_() const = 0;
 
    virtual float get_height_() const = 0;
 
    material::filter filter_ = material::filter::none;
 
private:
    std::optional<bounds2f> find_location_(float width, float height) const;
 
    std::unordered_map<std::string, std::weak_ptr<gui::material>> texture_list_;
    std::unordered_map<std::string, std::weak_ptr<gui::font>>     font_list_;
};
 
class atlas {
public:
    explicit atlas(renderer& rdr, material::filter filt);
 
    virtual ~atlas() = default;
 
    atlas(const atlas&) = delete;
 
    atlas(atlas&&) = delete;
 
    atlas& operator=(const atlas&) = delete;
 
    atlas& operator=(atlas&&) = delete;
 
    std::shared_ptr<material> fetch_material(const std::string& file_name) const;
 
    std::shared_ptr<material> add_material(const std::string& file_name, const material& mat);
 
    std::shared_ptr<font> fetch_font(const std::string& font_name) const;
 
    bool add_font(const std::string& font_name, std::shared_ptr<gui::font> fnt);
 
    std::size_t get_page_count() const;
 
protected:
    virtual std::unique_ptr<atlas_page> create_page_() = 0;
 
    renderer&        renderer_;
    material::filter filter_ = material::filter::none;
 
private:
    void add_page_();
 
    struct page_item {
        std::unique_ptr<atlas_page> page;
        std::shared_ptr<material>   no_texture_mat;
    };
 
    std::vector<page_item> page_list_;
};
 
} // namespace lxgui::gui
 
#endif