Function mupdf_sys::fz_begin_mask

pub unsafe extern "C" fn fz_begin_mask(
    ctx: *mut fz_context,
    dev: *mut fz_device,
    area: fz_rect,
    luminosity: c_int,
    colorspace: *mut fz_colorspace,
    bc: *const f32,
    color_params: fz_color_params
)