scoped_array<uint8_t> frame_A (new uint8_t[xyz_A->size().width * xyz_A->size().height * 4]);
dcp::xyz_to_rgba (xyz_A, dcp::ColourConversion::srgb_to_xyz(), frame_A.get());
scoped_array<uint8_t> frame_A (new uint8_t[xyz_A->size().width * xyz_A->size().height * 4]);
dcp::xyz_to_rgba (xyz_A, dcp::ColourConversion::srgb_to_xyz(), frame_A.get());