//-----------------------------------------------------------------------------
// TmxMapTile.h
//
// Copyright (c) 2010-2012, Tamir Atias
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//  * Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//  * Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL TAMIR ATIAS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: Tamir Atias
//-----------------------------------------------------------------------------
#pragma once

namespace Tmx 
{
	//-------------------------------------------------------------------------
	// Flags that may be in the first two bits of the gid.
	//-------------------------------------------------------------------------
	const unsigned FlippedHorizontallyFlag = 0x80000000;
	const unsigned FlippedVerticallyFlag   = 0x40000000;
	const unsigned FlippedDiagonallyFlag   = 0x20000000;

	//-------------------------------------------------------------------------
	// Struct to store information about a specific tile in the map layer.
	//-------------------------------------------------------------------------
	struct MapTile 
	{
		// Default constructor.
		MapTile()
			: gid(0)
			, flippedHorizontally(false)
			, flippedVertically(false)
			, flippedDiagonally(false)
		{}

		// Will take a gid and read the attributes from the first
		// two bits of it.
		MapTile(unsigned _gid)
			: gid(_gid)
			, flippedHorizontally((_gid & FlippedHorizontallyFlag) != 0)
			, flippedVertically((_gid & FlippedVerticallyFlag) != 0)
			, flippedDiagonally((_gid & FlippedDiagonallyFlag) != 0)
		{
			gid &= ~(FlippedHorizontallyFlag | FlippedVerticallyFlag | FlippedDiagonallyFlag);
		}

		// Global id.
		unsigned gid;

		// True when the tile should be drawn flipped horizontally.
		bool flippedHorizontally;

		// True when the tile should be drawn flipped vertically.
		bool flippedVertically;

		// True when the tile should be drawn flipped diagonally.
		bool flippedDiagonally;
	};
};