ColourConversion A (2.4, true, dcp::colour_matrix::srgb_to_xyz, 2.6);
ColourConversion B (2.4, false, dcp::colour_matrix::srgb_to_xyz, 2.6);
ColourConversion A (2.4, true, dcp::colour_matrix::srgb_to_xyz, 2.6);
ColourConversion B (2.4, false, dcp::colour_matrix::srgb_to_xyz, 2.6);