source/renderer/AlphaMapCalculator.h

   1 /* Copyright (C) 2009 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Determine which alpha blend map fits a given shape.
  20  */
  21
  22 #ifndef INCLUDED_ALPHAMAPCALCULATOR
  23 #define INCLUDED_ALPHAMAPCALCULATOR
  24
  25 #include <string.h>
  26 #include "BlendShapes.h"
  27
  28 // defines for blendmap flipping/rotating
  29 #define BLENDMAP_FLIPV          0x01
  30 #define BLENDMAP_FLIPU          0x02
  31 #define BLENDMAP_ROTATE90       0x04
  32 #define BLENDMAP_ROTATE180      0x08
  33 #define BLENDMAP_ROTATE270      0x10
  34
  35 ///////////////////////////////////////////////////////////////////////////////
  36 // CAlphaMapCalculator: functionality for calculating which alpha blend map
  37 // fits a given shape
  38 namespace CAlphaMapCalculator {
  39         // Calculate: return the index of the blend map that fits the given shape,
  40         // and the set of flip/rotation flags to get the shape correctly oriented
  41         int Calculate(BlendShape8 shape,unsigned int& flags);
  42 }
  43
  44 #endif