Function mupdf_sys::mupdf_begin_group

pub unsafe extern "C" fn mupdf_begin_group(
    ctx: *mut fz_context,
    device: *mut fz_device,
    area: fz_rect,
    cs: *mut fz_colorspace,
    isolated: bool,
    knockout: bool,
    blendmode: c_int,
    alpha: f32,
    errptr: *mut *mut mupdf_error_t
)