Image.h

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/*******************************************************************************
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#pragma once
 
#include "Zivid/Array2D.h"
#include "Zivid/Color.h"
#include "Zivid/Detail/CoreExport.h"
 
#include <string>
#include <type_traits>
 
namespace Zivid
{
#ifndef NO_DOC
    namespace Detail
    {
        template<typename T>
        class LoadImageTag
        {};
 
        ZIVID_CORE_EXPORT void saveImageImpl(const Zivid::Array2D<ColorRGBA> &img, const std::string &fileName);
        ZIVID_CORE_EXPORT void saveImageImpl(const Zivid::Array2D<ColorBGRA> &img, const std::string &fileName);
        ZIVID_CORE_EXPORT void saveImageImpl(const Zivid::Array2D<ColorSRGB> &img, const std::string &fileName);
        ZIVID_CORE_EXPORT Zivid::Image<ColorBGRA> loadImageImpl(
            const std::string &fileName,
            LoadImageTag<ColorBGRA> /* tag */);
        ZIVID_CORE_EXPORT Zivid::Image<ColorRGBA> loadImageImpl(
            const std::string &fileName,
            LoadImageTag<ColorRGBA> /* tag */);
        ZIVID_CORE_EXPORT Zivid::Image<ColorSRGB> loadImageImpl(
            const std::string &fileName,
            LoadImageTag<ColorSRGB> /* tag */);
    } // namespace Detail
#endif
    template<class PixelFormat>
    class Image : public Array2D<PixelFormat>
    {
    public:
        static_assert(
            std::is_same_v<PixelFormat, Zivid::ColorRGBA> || std::is_same_v<PixelFormat, Zivid::ColorBGRA>
                || std::is_same_v<PixelFormat, Zivid::ColorSRGB>,
            "PixelFormat must be Zivid::ColorRGBA, Zivid::ColorBGRA or Zivid::ColorSRGB");
 
        Image() = default;
 
        template<typename Iterator>
        Image(const Resolution &resolution, Iterator beginIt, Iterator endIt)
            : Array2D<PixelFormat>(resolution, beginIt, endIt)
        {}
 
        Image(const Resolution &resolution, const unsigned char *begin, const unsigned char *end)
            : Array2D<PixelFormat>{ resolution, begin, end }
 
        {}
 
        explicit Image(const std::string &fileName)
            : Image{ Detail::loadImageImpl(fileName, Detail::LoadImageTag<PixelFormat>{}) }
 
        {}
 
        Resolution resolution() const
        {
            return Resolution{ Array2D<PixelFormat>::width(), Array2D<PixelFormat>::height() };
        }
 
        void save(const std::string &fileName) const
        {
            return Detail::saveImageImpl(*this, fileName);
        }
 
#ifndef NO_DOC
        explicit Image(Array2D<PixelFormat> &&a)
            : Array2D<PixelFormat>(std::move(a))
        {}
#endif
    };
} // namespace Zivid