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| using ImageVariant =
std::variant<
Image<char,1>, Image<short,1>, Image<int,1>, Image<long,1>,
Image<char,2>, Image<short,2>, Image<int,2>, Image<long,2>,
Image<char,3>, Image<short,3>, Image<int,3>, Image<long,3>,
Image<char,4>, Image<short,4>, Image<int,4>, Image<long,4>
>;
ImageVariant createImageVariant(PixelType pixelType, size_t imageDim)
{
assert(imageDim >= 1 && imageDim <= 4);
switch(imageDim){
case 1:
{
constexpr size_t dim = 1;
switch(pixelType){
case PixelType::Char: return Image<char, dim>{};
case PixelType::Short: return Image<short, dim>{};
case PixelType::Int: return Image<int, dim>{};
case PixelType::Long: return Image<long, dim>{};
}
throw std::logic_error(std::string{__func__} + " : forgotten pixel type.");
}
case 2:
{
constexpr size_t dim = 2;
switch(pixelType){
case PixelType::Char: return Image<char, dim>{};
case PixelType::Short: return Image<short, dim>{};
case PixelType::Int: return Image<int, dim>{};
case PixelType::Long: return Image<long, dim>{};
}
throw std::logic_error(std::string{__func__} + " : forgotten pixel type.");
}
case 3:
{
constexpr size_t dim = 3;
switch(pixelType){
case PixelType::Char: return Image<char, dim>{};
case PixelType::Short: return Image<short, dim>{};
case PixelType::Int: return Image<int, dim>{};
case PixelType::Long: return Image<long, dim>{};
}
throw std::logic_error(std::string{__func__} + " : forgotten pixel type.");
}
case 4:
{
constexpr size_t dim = 4;
switch(pixelType){
case PixelType::Char: return Image<char, dim>{};
case PixelType::Short: return Image<short, dim>{};
case PixelType::Int: return Image<int, dim>{};
case PixelType::Long: return Image<long, dim>{};
}
throw std::logic_error(std::string{__func__} + " : forgotten pixel type.");
}
default:
throw std::invalid_argument(
std::string{__func__} + " : invalid imageDim argument : " +
std::to_string(imageDim) + "."
);
}
} |
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