pix_width
enum pix_width_e { pix_width = pixfmt_type::pix_width };
enum pix_width_e { pix_width = pixfmt_type::pix_width };
enum pix_width_e { pix_width = pixfmt_type::pix_width };
enum pix_width_e { pix_width = pixfmt_type::pix_width };
pix_width = sizeof(value_type),
pix_width = sizeof(value_type) * 3
pix_width = sizeof(pixel_type)
pix_width = sizeof(pixel_type)
pix_width = sizeof(value_type) * 4
pix_width = 4,