boost::gil::bit_aligned_pixel_reference

Heterogeneous pixel reference corresponding to non‐byte‐aligned bit range. Models ColorBaseConcept, PixelConcept, PixelBasedConcept

Synopsis

Declared in <boost/gil/bit_aligned_pixel_reference.hpp>

template<
    typename B,
    typename C,
    typename L,
    bool M>
struct bit_aligned_pixel_reference;

Description

Example:

unsigned char data=0;

// A mutable reference to a 6-bit BGR pixel in "123" format (1 bit for red, 2 bits for green, 3 bits for blue)
using rgb123_ref_t = bit_aligned_pixel_reference<unsigned char, mp11::mp_list_c<int,1,2,3>, rgb_layout_t, true> const;

// create the pixel reference at bit offset 2
// (i.e. red = [2], green = [3,4], blue = [5,6,7] bits)
rgb123_ref_t ref(&data, 2);
get_color(ref, red_t()) = 1;
assert(data == 0x04);
get_color(ref, green_t()) = 3;
assert(data == 0x1C);
get_color(ref, blue_t()) = 7;
assert(data == 0xFC);