如何为 LuaTeX 中的规则节点着色？

Question

当我做这样的事情时：

% !TEX TS-program = lualatex
\documentclass[english]{book}
\usepackage{babel}
\directlua{
    COL = node.subtype ( "pdf_colorstack" )
    WHAT = node.id ( "whatsit" )
    color_push = node.new ( WHAT, COL )
    color_pop = node.new ( WHAT, COL )
    color_push.stack = 0
    color_pop.stack = 0
    color_push.command = 1
    color_pop.command = 2
    color_push.data = "1 0 0 rg"

    local function test ( head )
        for n in node.traverse_id ( node.id ( "disc" ), head ) do
            head = node.insert_before ( head, n.prev, node.copy ( color_push ) )
            head = node.insert_before ( head, n, node.new ( node.id ( "rule" ) ) )
            head = node.insert_after ( head, n.next, node.copy ( color_pop ) )
            n.prev.subtype = 0
            n.prev.width = 50000
        end
        return head
    end

    luatexbase.add_to_callback ( "pre_linebreak_filter", test, "test" )
}

\begin{document}

movement

\end{document}

我得到以下结果：

我怎样才能为规则节点着色？

Answer 1

rg仅填充轮廓颜色，而描边颜色用 设定RG。因此您需要1 0 0 rg 1 0 0 RG按顺序设定两者。