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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_LAB_COLORSPACE_TRAITS_H_
 #define _KO_LAB_COLORSPACE_TRAITS_H_
 
 
 /** 
  * LAB traits, it provides some convenient functions to
  * access LAB channels through an explicit API.
  *
  * Use this class in conjonction with KoColorSpace::toLabA16 and
  * KoColorSpace::fromLabA16 data.
  *
  * Example:
  * quint8* p = KoLabU16Traits::allocate(1);
  * oneKoColorSpace->toLabA16(somepointertodata, p, 1);
  * KoLabU16Traits::setL( p, KoLabU16Traits::L(p) / 10 );
  * oneKoColorSpace->fromLabA16(p, somepointertodata, 1);
  */
 template<typename _channels_type_>
 struct KoLabTraits : public KoColorSpaceTrait<_channels_type_, 4, 3> {
     typedef _channels_type_ channels_type;
     typedef KoColorSpaceTrait<_channels_type_, 4, 3> parent;
     static const qint32 L_pos = 0;
     static const qint32 a_pos = 1;
     static const qint32 b_pos = 2;
 
     /**
      * An Lab pixel
      */
     struct Pixel {
         channels_type L;
         channels_type a;
         channels_type b;
         channels_type alpha;
     };
 
     /// @return the L component
     inline static channels_type L(quint8* data) {
         channels_type* d = parent::nativeArray(data);
         return d[L_pos];
     }
     /// Set the L component
     inline static void setL(quint8* data, channels_type nv) {
         channels_type* d = parent::nativeArray(data);
         d[L_pos] = nv;
     }
     /// @return the a component
     inline static channels_type a(quint8* data) {
         channels_type* d = parent::nativeArray(data);
         return d[a_pos];
     }
     /// Set the a component
     inline static void setA(quint8* data, channels_type nv) {
         channels_type* d = parent::nativeArray(data);
         d[a_pos] = nv;
     }
     /// @return the b component
     inline static channels_type b(quint8* data) {
         channels_type* d = parent::nativeArray(data);
         return d[b_pos];
     }
     /// Set the a component
     inline static void setB(quint8* data, channels_type nv) {
         channels_type* d = parent::nativeArray(data);
         d[b_pos] = nv;
     }
 };
 
 
 struct KoLabU8Traits : public KoLabTraits<quint8> {
 };
 
 struct KoLabU16Traits : public KoLabTraits<quint16> {
 };
 
 #include <KoConfig.h>
 #ifdef HAVE_OPENEXR
 #include <half.h>
 
 struct KoLabF16Traits : public KoLabTraits<half> {
 };
 
 #endif
 
 struct KoLabF32Traits : public KoLabTraits<float> {
 };
 
 struct KoLabF64Traits : public KoLabTraits<double> {
 };
 
 #endif