Function rs_RGBColorMatrix 

pub unsafe extern "C" fn rs_RGBColorMatrix(
    dst_argb: *mut u8,
    dst_stride_argb: c_int,
    matrix_rgb: *const i8,
    dst_x: c_int,
    dst_y: c_int,
    width: c_int,
    height: c_int,
) -> c_int