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 /*
  *  Copyright (c) 2006-2007 Cyrille Berger <cberger@cberger.net>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * This library 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
 */
 
 #ifndef _KO_GRAY_COLORSPACE_TRAITS_H_
 #define _KO_GRAY_COLORSPACE_TRAITS_H_
 
 /** 
  * Base class for graya traits, it provides some convenient functions to
  * access gray channels through an explicit API.
  */
 template<typename _channels_type_>
 struct KoGrayTraits : public KoColorSpaceTrait<_channels_type_, 2, 1> {
     
     typedef _channels_type_ channels_type;
     typedef KoColorSpaceTrait<_channels_type_, 2, 1> parent;
     
     static const qint32 gray_pos = 0;
     
     /**
      * An grayscale pixel
      */
     struct Pixel {
         channels_type gray;
         channels_type alpha;
     };
 
     /// @return the gray component
     inline static channels_type gray(quint8* data) {
         channels_type* d = parent::nativeArray(data);
         return d[gray_pos];
     }
     
     /// Set the gray component
     inline static void setGray(quint8* data, channels_type nv) {
         channels_type* d = parent::nativeArray(data);
         d[gray_pos] = nv;
     }
 };
 
 
 struct KoGrayU8Traits : public KoGrayTraits<quint8> {
 };
 
 struct KoGrayU16Traits : public KoGrayTraits<quint16> {
 };
 
 struct KoGrayU32Traits : public KoGrayTraits<quint32> {
 };
 
 
 #include <KoConfig.h>
 #ifdef HAVE_OPENEXR
 #include <half.h>
 
 struct KoGrayF16Traits : public KoGrayTraits<half> {
 };
 
 #endif
 
 struct KoGrayF32Traits : public KoGrayTraits<float> {
 };
 
 struct KoGrayF64Traits : public KoGrayTraits<double> {
 };
 
 #endif