Add spritesheet and change image format

source/spritesheet.cpp

@@ -0,0 +1,92 @@
+/*
+ *   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.
+ */
+
+#include "spritesheet.hpp"
+
+#include <nds.h>
+
+Image Spritesheet::_blank = Image(nullptr, 0);
+
+Spritesheet::Spritesheet(const std::vector<std::string> &paths, const std::vector<u32> indexes) {
+	// Attempt to load from the given paths
+	FILE *file = nullptr;
+	for(const auto &path : paths) {
+		file = fopen(path.c_str(), "rb");
+		if(file)
+			break;
+	}
+
+	// Return if no file found
+	if(!file)
+		return;
+
+	u32 magic;
+	fread(&magic, 4, 1, file);
+	if(magic != 0x5844542E) // '.TDX'
+		return;
+
+	u32 imageCount;
+	fread(&imageCount, 4, 1, file);
+
+	_images.resize(imageCount);
+	
+	for(u32 i = 0; i < imageCount; i++) {
+		nocashMessage(std::to_string(std::find(indexes.begin(), indexes.end(), i) - indexes.begin()).c_str());
+		if(indexes.size() == 0 || std::find(indexes.begin(), indexes.end(), i) != indexes.end()) {
+			fseek(file, 0x10 + i * 8, SEEK_SET);
+
+			u32 offset, size;
+			fread(&offset, 4, 1, file);
+			fread(&size, 4, 1, file);
+
+			u8 *grf = new u8[size];
+			fseek(file, offset, SEEK_SET);
+			fread(grf, 1, size, file);
+
+			_images[i] = new Image(grf, 0);
+
+			delete[] grf;
+		} else {
+			_images[i] = nullptr;
+		}
+	}
+
+	fclose(file);
+}
+
+Spritesheet::~Spritesheet(void) {
+	for(Image *image : _images) {
+		if(image)
+			delete image;
+	}
+}
+
+Image &Spritesheet::operator[](size_t index) {
+	if(_images[index] && index < _images.size())
+		return *_images[index];
+	else
+		return _blank;
+}