awk script to generation svg document with text inside rect

generator_svg_with_rect_and_text.awk

# GNU Awk 4.2.1, API: 2.0
#
# before run - set variable values, after
# awk -f generator_svg_with_rect_and_text.awk > document.svg
#
# after you can convert svg to png with inkscape
# inkscape --export-png=document.png document.svg

function print_start(   page_width, page_height, unit_size) {
    printf "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>"
    printf "<svg"
    printf "   xmlns:dc=\"http://purl.org/dc/elements/1.1/\""
    printf "   xmlns:cc=\"http://creativecommons.org/ns#\""
    printf "   xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\""
    printf "   xmlns:svg=\"http://www.w3.org/2000/svg\""
    printf "   xmlns=\"http://www.w3.org/2000/svg\""
    printf "   xmlns:sodipodi=\"http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd\""
    printf "   xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\""
    printf "   width=\""page_width unit_size"\""
    printf "   height=\""page_height unit_size"\""
    printf "   viewBox=\"0 0 "page_width " "page_height"\""
    printf "   version=\"1.1\""
    printf "   id=\"svg8\">"
    printf "  <defs"
    printf "     id=\"defs2\" />"
    printf "  <sodipodi:namedview"
    printf "     id=\"base\""
    printf "     pagecolor=\"#ffffff\""
    printf "     bordercolor=\"#666666\""
    printf "     borderopacity=\"1.0\""
    printf "     inkscape:document-units=\""unit_size"\""
    printf "     inkscape:current-layer=\"layer1\""
    printf "     showgrid=\"false\""
    printf "  />"
    printf "  <metadata"
    printf "     id=\"metadata5\">"
    printf "    <rdf:RDF>"
    printf "      <cc:Work"
    printf "         rdf:about=\"\">"
    printf "        <dc:format>image/svg+xml</dc:format>"
    printf "        <dc:type"
    printf "           rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\" />"
    printf "        <dc:title></dc:title>"
    printf "      </cc:Work>"
    printf "    </rdf:RDF>"
    printf "  </metadata>"
    printf "  <g"
    printf "     inkscape:label=\"Layer 1\""
    printf "     inkscape:groupmode=\"layer\""
    printf "     id=\"layer1\">"
}

function print_end() {
    printf "         </g>"
    printf "</svg>"
}

function id() {
    _id += 1
    return _id
}

function gen_rect_with_text(   i, j, text) {
    if (i % 2 == 0) {
        if (color_trigger == 0) { color = color1; color_trigger = 1 }
        else { color = color2; color_trigger = 0}
    } else {
        if (color_trigger == 1) { color = color1; color_trigger = 0 }
        else { color = color2; color_trigger = 1}
    }
    x = i * width
    y = j * height
    printf "<rect style=\"opacity:1;fill:"color";fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1\" id=\""id()"\" width=\""width"\" height=\""height"\" x=\""x"\" y=\""y"\" />"
    printf "<flowRoot xml:space=\"preserve\" id=\""id()"\" style=\"font-style:normal;font-weight:normal;font-size:"fontsize"px;line-height:"lineheight"px;font-family:sans-serif;text-align:center;letter-spacing:0px;word-spacing:0px;fill:"fontcolor";fill-opacity:1;stroke:none\"><flowRegion id=\""id()"\"><rect id=\""id()"\" width=\""width"\" height=\""height"\" x=\""x"\" y=\""y"\" /></flowRegion><flowPara id=\""id()"\">"text"</flowPara></flowRoot>\n"
}

BEGIN {
    _id = 0
    color1 = "#f0f0f0" # first rect
    color2 = "#a0a0a0" # second rect
    color_trigger = 0
    width = 10 # rect width
    height = 10 # rect height
    fontsize = 3
    lineheight = height
    fontcolor = "#505050"

    left = 10
    right = 10

    page_width = width * left
    page_height = height * right
    unit_size = "mm"

    print_start(page_width, page_height, unit_size)

    for (i=0; i < left; ++i) {
        for (j=0; j < right; ++j) {
            t = i "." j
            gen_rect_with_text(i, j, t)
        }
    }

    print_end()
}