TmxMapTile.h

//-----------------------------------------------------------------------------
// TmxMapTile.h
//
// Copyright (c) 2010-2014, 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 MapTile 
    {
        MapTile()
            : tilesetId(0)
            , id(0)
            , flippedHorizontally(false)
            , flippedVertically(false)
            , flippedDiagonally(false)
        {}

        MapTile(unsigned _gid, int _tilesetFirstGid, unsigned _tilesetId)
            : tilesetId(_tilesetId)
            , id(_gid & ~(FlippedHorizontallyFlag | FlippedVerticallyFlag | FlippedDiagonallyFlag))
            , flippedHorizontally((_gid & FlippedHorizontallyFlag) != 0)
            , flippedVertically((_gid & FlippedVerticallyFlag) != 0)
            , flippedDiagonally((_gid & FlippedDiagonallyFlag) != 0)
        {
            gid = id;
            id -= _tilesetFirstGid;
        }

        int tilesetId;

        unsigned id;

        unsigned gid;

        bool flippedHorizontally;

        bool flippedVertically;

        bool flippedDiagonally;
    };
}