Add spritesheet and change image format

include/spritesheet.hpp

@@ -0,0 +1,66 @@
+/*
+*   This file is part of Universal-Core
+*   Copyright (C) 2021 Universal-Team
+*
+*   This program is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   This program is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*
+*   Additional Terms 7.b and 7.c of GPLv3 apply to this file:
+*       * Requiring preservation of specified reasonable legal notices or
+*         author attributions in that material or in the Appropriate Legal
+*         Notices displayed by works containing it.
+*       * Prohibiting misrepresentation of the origin of that material,
+*         or requiring that modified versions of such material be marked in
+*         reasonable ways as different from the original version.
+*/
+
+#ifndef _UNIVERSAL_CORE_SPRITESHEET_HPP
+#define _UNIVERSAL_CORE_SPRITESHEET_HPP
+
+#include "image.hpp"
+
+class Spritesheet {
+private:
+	static Image _blank;
+
+	std::vector<Image *> _images;
+
+public:
+	/**
+	 * @brief Image group class
+	 * @param paths The paths to try load the spritesheet from, from highest to lowest priority
+	 * @param indexes The image indexes to load, if blank all images will be loaded
+	 */
+	Spritesheet(const std::vector<std::string> &paths, const std::vector<u32> indexes = {});
+	/**
+	 * @brief Image group class
+	 * @param path The path to load the spritesheet from
+	 * @param indexes The image indexes to load, if blank all images will be loaded
+	 */
+	Spritesheet(const std::string &path, const std::vector<u32> indexes = {}) : Spritesheet(std::vector<std::string>({path}), indexes) {};
+
+	~Spritesheet(void);
+
+	/**
+	 * @brief Returns the number of images in the spritesheet
+	 */
+	size_t size(void) { return _images.size(); }
+
+	/**
+	 * @brief Returns the Image at index
+	 * @param index The Image to get
+	 */
+	Image &operator[](size_t index);
+};
+
+#endif