sccolorspacedata_laba.h

#ifndef SCCOLORSPACEDATA_LABA_H
#define SCCOLORSPACEDATA_LABA_H

#include <cassert>
#include <climits>
#include <limits>
#include "sccolorprofile.h"
#include "sccolorspacedata.h"

template<typename T, eColorFormat COLORFORMAT>
class ScColorSpaceDataTempl_LabA : public ScColorSpaceData
{
protected:
    int m_LIndex;
    int m_aIndex;
    int m_bIndex;
    int m_AIndex;

public:
    ScColorSpaceDataTempl_LabA(ScColorProfile& profile);

    virtual uint alphaIndex(void) const { return m_AIndex; }
    virtual void flattenAlpha(void* dataIn, uint numElems) const;
};

template<typename T, eColorFormat COLORFORMAT>
ScColorSpaceDataTempl_LabA<T, COLORFORMAT>::ScColorSpaceDataTempl_LabA(ScColorProfile& profile)
{
    m_colorFormat = COLORFORMAT;
    m_profile     = profile;
    if (m_colorFormat == Format_LabA_8)
    {
        m_LIndex = 0;
        m_aIndex = 1;
        m_bIndex = 2;
        m_AIndex = 3;
    }
    else
    {
        assert(false);
    }
    if (m_profile)
    {
        assert(m_profile.colorSpace() == ColorSpace_Lab);
    }
};

template<typename T, eColorFormat COLORFORMAT>
void ScColorSpaceDataTempl_LabA<T, COLORFORMAT>::flattenAlpha(void* dataIn, uint numElems) const
{
    T* data   = ((T*) dataIn) + m_aIndex;
    T  nLimit = std::numeric_limits<T>::max();
    while (numElems > 0)
    {
        *data = nLimit;
        data += 4;
        --numElems;
    };
};

typedef ScColorSpaceDataTempl_LabA<char, Format_LabA_8>  ScColorSpaceData_LabA8;

#endif