Function mupdf_sys::mupdf_begin_mask

pub unsafe extern "C" fn mupdf_begin_mask(
    ctx: *mut fz_context, 
    device: *mut fz_device, 
    area: fz_rect, 
    luminosity: bool, 
    cs: *mut fz_colorspace, 
    color: *const f32, 
    cp: fz_color_params, 
    errptr: *mut *mut mupdf_error_t
)