Initial commit

engines/crab/TMX/TileInfo.h

@@ -0,0 +1,100 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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/>.
+ *
+ */
+
+/*
+ * This code is based on the CRAB engine
+ *
+ * Copyright (c) Arvind Raja Yadav
+ *
+ * Licensed under MIT
+ *
+ */
+
+#ifndef CRAB_TILEINFO_H
+#define CRAB_TILEINFO_H
+
+#include "crab/loaders.h"
+
+namespace Crab {
+
+namespace TMX {
+typedef uint GidFormat;
+
+// Bits on the far end of the 32-bit global tile ID are used for tile flags
+const static GidFormat FlippedHorizontallyFlag = 0x80000000;
+const static GidFormat FlippedVerticallyFlag = 0x40000000;
+const static GidFormat FlippedAntiDiagonallyFlag = 0x20000000;
+
+struct TileInfo {
+	// The gid of the tile
+	GidFormat _gid;
+
+	// Do we need to flip this tile?
+	TextureFlipType _flip;
+
+	TileInfo() {
+		_gid = 0;
+		_flip = FLIP_NONE;
+	}
+
+	TileInfo(rapidxml::xml_node<char> *node) {
+		// Load the gid of the tile
+		if (!loadNum(_gid, "gid", node))
+			_gid = 0;
+
+		bool horizontal = (_gid & FlippedHorizontallyFlag) != 0;
+		bool vertical = (_gid & FlippedVerticallyFlag) != 0;
+		bool antidiagonal = (_gid & FlippedAntiDiagonallyFlag) != 0;
+
+		// Find how the tile is flipped
+		if (horizontal) {
+			if (vertical) {
+				if (antidiagonal)
+					_flip = FLIP_XYD;
+				else
+					_flip = FLIP_XY;
+			} else if (antidiagonal)
+				_flip = FLIP_DX;
+			else
+				_flip = FLIP_X;
+		} else if (vertical) {
+			if (antidiagonal)
+				_flip = FLIP_DY;
+			else
+				_flip = FLIP_Y;
+		} else if (antidiagonal)
+			_flip = FLIP_D;
+		else
+			_flip = FLIP_NONE;
+
+		// Clear the flags
+		_gid &= ~(FlippedHorizontallyFlag | FlippedVerticallyFlag | FlippedAntiDiagonallyFlag);
+	}
+
+	bool operator==(const TileInfo& other) const {
+		return (_gid == other._gid) && (_flip == other._flip);
+	}
+};
+} // End of namespace TMX
+
+} // End of namespace Crab
+
+#endif // CRAB_TILEINFO_H