sccolorspacedata_rgba.h

#ifndef SCCOLORSPACEDATA_RGBA_H
#define SCCOLORSPACEDATA_RGBA_H

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

template<typename T, eColorFormat COLORFORMAT>
class ScColorSpaceDataTempl_RGBA : public ScColorSpaceData
{
protected:
    int m_rIndex;
    int m_gIndex;
    int m_bIndex;
    int m_aIndex;

public:
    ScColorSpaceDataTempl_RGBA(ScColorProfile& profile);

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

template<typename T, eColorFormat COLORFORMAT>
ScColorSpaceDataTempl_RGBA<T, COLORFORMAT>::ScColorSpaceDataTempl_RGBA(ScColorProfile& profile)
{
    m_colorFormat = COLORFORMAT;
    m_profile     = profile;
    if (m_colorFormat == Format_RGBA_8 || m_colorFormat == Format_RGBA_16)
    {
        m_rIndex = 0;
        m_gIndex = 1;
        m_bIndex = 2;
        m_aIndex = 3;
    }
    else if (m_colorFormat == Format_ARGB_8 || m_colorFormat == Format_ARGB_16)
    {
        m_rIndex = 1;
        m_gIndex = 2;
        m_bIndex = 3;
        m_aIndex = 0;
    }
    else if (m_colorFormat == Format_BGRA_8 || m_colorFormat == Format_BGRA_16)
    {
        m_rIndex = 2;
        m_gIndex = 1;
        m_bIndex = 0;
        m_aIndex = 3;
    }
    else
    {
        assert(false);
    }
    if (m_profile)
    {
        assert(m_profile.colorSpace() == ColorSpace_Rgb);
    }
};

template<typename T, eColorFormat COLORFORMAT>
void ScColorSpaceDataTempl_RGBA<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_RGBA<unsigned char , Format_RGBA_8>  ScColorSpaceData_RGBA8;
typedef ScColorSpaceDataTempl_RGBA<unsigned short, Format_RGBA_16> ScColorSpaceData_RGBA16;
typedef ScColorSpaceDataTempl_RGBA<unsigned char , Format_ARGB_8>  ScColorSpaceData_ARGB8;
typedef ScColorSpaceDataTempl_RGBA<unsigned short, Format_ARGB_16> ScColorSpaceData_ARGB16;
typedef ScColorSpaceDataTempl_RGBA<unsigned char , Format_BGRA_8>  ScColorSpaceData_BGRA8;
typedef ScColorSpaceDataTempl_RGBA<unsigned short, Format_BGRA_16> ScColorSpaceData_BGRA16;

#endif