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# LinearMinificationFilter.h

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    00001 //------------------------------------------------------------------------------
    00002 // Lamp : Open source game middleware
    00003 // Copyright (C) 2004  Junpei Ohtani ( Email : junpee@users.sourceforge.jp )
    00004 //
    00005 // This library is free software; you can redistribute it and/or
    00006 // modify it under the terms of the GNU Lesser General Public
    00007 // License as published by the Free Software Foundation; either
    00008 // version 2.1 of the License, or (at your option) any later version.
    00009 //
    00010 // This library is distributed in the hope that it will be useful,
    00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013 // Lesser General Public License for more details.
    00014 //
    00015 // You should have received a copy of the GNU Lesser General Public
    00016 // License along with this library; if not, write to the Free Software
    00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00018 //------------------------------------------------------------------------------
    00019
    00020 /** @file
    00021  * 線形縮小フィルタヘッダ
    00022  * @author Junpee
    00023  */
    00024
    00025 #ifndef LINEAR_MINIFICATION_FILTER_H_
    00026 #define LINEAR_MINIFICATION_FILTER_H_
    00027
    00028 namespace Lamp{
    00029
    00030 //------------------------------------------------------------------------------
    00031 /**
    00032  * 線形縮小フィルタ
    00033  */
    00034 class LinearMinificationFilter{
    00035 public:
    00036     /**
    00037      * 次のサイズ取得
    00038      * @param nowSize 現在のサイズ
    00039      * @return 次のサイズ
    00040      */
    00041     static DimensionI getNextSize(const DimensionI& nowSize){
    00042         Assert((nowSize.width != 0) && (nowSize.height != 0));
    00043         Assert((nowSize.width != 1) || (nowSize.height != 1));
    00044         DimensionI result(nowSize.width / 2, nowSize.height / 2);
    00045         if(result.width == 0){ result.width = 1; }
    00046         if(result.height == 0){ result.height = 1; }
    00047         return result;
    00048     }
    00049
    00050     /**
    00051      * フィルタ
    00052      * @param source ソースイメージ
    00053      * @param sourceSize ソースイメージサイズ
    00054      * @param destination デスティネーションイメージ
    00055      * @param destinationSize デスティネーションイメージサイズ
    00056      */
    00057     static void filter(
    00058         const Color3c* source, const DimensionI& sourceSize,
    00059         Color3c* destination, const DimensionI destinationSize);
    00060
    00061     /**
    00062      * フィルタ
    00063      * @param source ソースイメージ
    00064      * @param sourceSize ソースイメージサイズ
    00065      * @param destination デスティネーションイメージ
    00066      * @param destinationSize デスティネーションイメージサイズ
    00067      */
    00068     static void filter(
    00069         const Color4c* source, const DimensionI& sourceSize,
    00070         Color4c* destination, const DimensionI destinationSize);
    00071
    00072 private:
    00073     // コンストラクタの隠蔽
    00074     LinearMinificationFilter();
    00075
    00076 };
    00077
    00078 //------------------------------------------------------------------------------
    00079 } // End of namespace Lamp
    00080 #endif // End of LINEAR_MINIFICATION_FILTER_H_
    00081 //------------------------------------------------------------------------------
    00082