cube-lib 0.2.2

魔方 核心库
Documentation 
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// use std::fs;
// use std::io::Write;
use std::sync::Arc;

use once_cell::sync::Lazy;
use resvg::{
    tiny_skia::{Pixmap, Transform},
    usvg::{self},
};
use resvg::usvg::fontdb;

const FAIL_IMAGE: &str = r"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAAAXN
SR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAHjSURBVGhD7Zg/MgRBFMaHQCoRSDgACTEBmcw
FhE7AAZRbUKXKGZAIVEmIOQAJAYFEiiq+b992VVfXm+meP93b6F/Vr/bt7uvZ+banZ2a3KhQKjUyNH4dgDq5LGcwNfJMyHzbgd0s
5ZhCmx4+/nhIkN3yLfREeSqlyC0+krObhlpTBXMJXKatduCalygF8krI9K1BbpMZTOBTclvYZRu5LLf/m0OK3cCelyj08k7I327D
pW1+F/LxO+A6tlP6PQ6sEyY0SJDdKEIWP8WMbuoxRGSrIBVyGj6NnYbB3CZ6PnkUm5ILIHZmBZAE+QK3Plj3sJRzLbWh9ttEviLx
7/ZSyeoabsGlm+B572Es49kXKeITeohxD+76tbmbsmSAccwTdPs3GGfERGoT6wvQJQZMFoXVheDi5IdirbaPOpEGoFoa/NA1tZ8K
YPAh1wxi6zIRxIkGo9lufr2m9IU4kiLuwDWbNaGN8Jg+inZ3cNdMlTNIgWgiuCe0E0DZMsiBaCPvs1DdMkiB1M+H29QkTPYhvJly
7hokeZB8afCGMbpg9qPXZRg/yBXdgaAijCcOx3IbWYxs9COWOXDmvhcgxISFokiApbAxS/nzIjRIkN/5MEPuipDEL+Y9HDlzDdyk
LhUI7quoHAQ0s0rJCwQoAAAAASUVORK5CYII=";
static GLOBAL_FONTDB: Lazy<Arc<fontdb::Database>> = Lazy::new(|| {
    let mut fontdb = fontdb::Database::new();
    fontdb.set_serif_family("Noto Serif");
    fontdb.set_sans_serif_family("Noto Sans");
    fontdb.set_cursive_family(r"Yellowtail");
    fontdb.set_fantasy_family(r"Sedgwick Ave Display");
    fontdb.set_monospace_family("Noto Mono");
    Arc::new(fontdb)
});

pub fn render(svg: String) -> String {
    let mut opt = usvg::Options::default();
    opt.fontdb = GLOBAL_FONTDB.clone();
    let tree = {
        match usvg::Tree::from_str(svg.as_str(), &opt) {
            Ok(tree) => tree,
            Err(_) => return FAIL_IMAGE.to_string(),
        }
    };
    let size = match tree
        .size()
        .to_int_size()
        .scale_to_width(600)
    {
        Some(size) => size,
        None => return FAIL_IMAGE.to_string(),
    };
    let transform = Transform::from_scale(size.width() as f32 / tree.size().width(),
                                          size.height() as f32 / tree.size().height(), );
    let mut pixmap = match Pixmap::new(600, 325) {
        Some(pixmap) => pixmap,
        _ => return FAIL_IMAGE.to_string(),
    };
    resvg::render(&tree, transform, &mut pixmap.as_mut());

    pixmap.save_png("tests.png").unwrap();
    let data = match pixmap.encode_png() {
        Ok(data) => data,
        _ => return FAIL_IMAGE.to_string(),
    };
    let engine = base64::engine::general_purpose::STANDARD;
    let bas64_string = base64::Engine::encode(&engine, data);
    let bas64_png = format!("data:image/png;base64,{}", bas64_string);
    // let mut file = fs::File::create("bas64_png.txt").expect("create file failed");
    // file.write_all(bas64_png.as_ref()).expect("write failed");
    bas64_png
}

mod tests {
    use crate::resvg::render;

    #[test]
    fn it_works() {
        render(String::from(r#"<svg id='图层_1' data-name='图层 1' xmlns='http://www.w3.org/2000/svg'>
    <rect class='cls-l10' x='0.25' y='59.25' width='12.39' height='12.49' fill='red'/>
    <path d='M12.39,63.5v12H.5v-12H12.39m.5-.5H0V76H12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-l00' x='0.25' y='44.96' width='12.39' height='12.49' fill='red'/>
    <path d='M12.39,49.21v12H.5v-12H12.39m.5-.5H0v13H12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-l20' x='0.25' y='73.54' width='12.39' height='12.49' fill='red'/>
    <path d='M12.39,77.79v12H.5v-12H12.39m.5-.5H0v13H12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-l01' x='14.43' y='44.96' width='12.39' height='12.49' fill='red'/>
    <path d='M26.57,49.21v12H14.68v-12H26.57m.5-.5H14.18v13H27.07v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-l11' x='14.43' y='59.25' width='12.39' height='12.49' fill='red'/>
    <path d='M26.57,63.5v12H14.68v-12H26.57m.5-.5H14.18V76H27.07V63Z' transform='translate(0 -4)'/>
    <rect class='cls-l21' x='14.43' y='73.54' width='12.39' height='12.49' fill='red'/>
    <path d='M26.57,77.79v12H14.68v-12H26.57m.5-.5H14.18v13H27.07v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-l02' x='28.61' y='44.96' width='12.39' height='12.49' fill='red'/>
    <path d='M40.75,49.21v12H28.86v-12H40.75m.5-.5H28.36v13H41.25v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-l12' x='28.61' y='59.25' width='12.39' height='12.49' fill='red'/>
    <path d='M40.75,63.5v12H28.86v-12H40.75m.5-.5H28.36V76H41.25V63Z' transform='translate(0 -4)'/>
    <rect class='cls-l22' x='28.61' y='73.54' width='12.39' height='12.49' fill='red'/>
    <path d='M40.75,77.79v12H28.86v-12H40.75m.5-.5H28.36v13H41.25v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='59.25' width='12.39' height='12.49' fill='blue'/>
    <path d='M56.72,63.5v12H44.83v-12H56.72m.5-.5H44.33V76H57.22V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='44.96' width='12.39' height='12.49' fill='blue'/>
    <path d='M56.72,49.21v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='73.54' width='12.39' height='12.49' fill='blue'/>
    <path d='M56.72,77.79v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='44.96' width='12.39' height='12.49' fill='blue'/>
    <path d='M70.9,49.21v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='59.25' width='12.39' height='12.49' fill='blue'/>
    <path d='M70.9,63.5v12H59v-12H70.9m.5-.5H58.51V76H71.4V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='73.54' width='12.39' height='12.49' fill='blue'/>
    <path d='M70.9,77.79v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='44.96' width='12.39' height='12.49' fill='blue'/>
    <path d='M85.08,49.21v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='59.25' width='12.39' height='12.49' fill='blue'/>
    <path d='M85.08,63.5v12H73.19v-12H85.08m.5-.5H72.69V76H85.58V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='73.54' width='12.39' height='12.49' fill='blue'/>
    <path d='M85.08,77.79v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='14.54' width='12.39' height='12.49' fill='yellow'/>
    <path d='M56.72,18.79v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='0.25' width='12.39' height='12.49' fill='yellow'/>
    <path d='M56.72,4.5v12H44.83V4.5H56.72m.5-.5H44.33V17H57.22V4Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='28.83' width='12.39' height='12.49' fill='yellow'/>
    <path d='M56.72,33.08v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='0.25' width='12.39' height='12.49' fill='yellow'/>
    <path d='M70.9,4.5v12H59V4.5H70.9m.5-.5H58.51V17H71.4V4Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='14.54' width='12.39' height='12.49' fill='yellow'/>
    <path d='M70.9,18.79v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='28.83' width='12.39' height='12.49' fill='yellow'/>
    <path d='M70.9,33.08v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='0.25' width='12.39' height='12.49' fill='yellow'/>
    <path d='M85.08,4.5v12H73.19V4.5H85.08m.5-.5H72.69V17H85.58V4Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='14.54' width='12.39' height='12.49' fill='yellow'/>
    <path d='M85.08,18.79v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='28.83' width='12.39' height='12.49' fill='yellow'/>
    <path d='M85.08,33.08v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='103.97' width='12.39' height='12.49' fill='orange'/>
    <path d='M56.72,108.22v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='89.68' width='12.39' height='12.49' fill='orange'/>
    <path d='M56.72,93.93v12H44.83v-12H56.72m.5-.5H44.33v13H57.22v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='44.58' y='118.26' width='12.39' height='12.49' fill='orange'/>
    <path d='M56.72,122.51v12H44.83v-12H56.72m.5-.5H44.33v13H57.22V122Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='89.68' width='12.39' height='12.49' fill='orange'/>
    <path d='M70.9,93.93v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='103.97' width='12.39' height='12.49' fill='orange'/>
    <path d='M70.9,108.22v12H59v-12H70.9m.5-.5H58.51v13H71.4v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='58.76' y='118.26' width='12.39' height='12.49' fill='orange'/>
    <path d='M70.9,122.51v12H59v-12H70.9m.5-.5H58.51v13H71.4V122Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='89.68' width='12.39' height='12.49' fill='orange'/>
    <path d='M85.08,93.93v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='103.97' width='12.39' height='12.49' fill='orange'/>
    <path d='M85.08,108.22v12H73.19v-12H85.08m.5-.5H72.69v13H85.58v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='72.94' y='118.26' width='12.39' height='12.49' fill='orange'/>
    <path d='M85.08,122.51v12H73.19v-12H85.08m.5-.5H72.69v13H85.58V122Z' transform='translate(0 -4)'/>
    <rect class='cls-r00' x='89.82' y='44.96' width='12.39' height='12.49' fill='green'/>
    <path d='M102,49.21v12H90.07v-12H102m.5-.5H89.57v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-r10' x='89.82' y='59.25' width='12.39' height='12.49' fill='green'/>
    <path d='M102,63.5v12H90.07v-12H102m.5-.5H89.57V76h12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-r20' x='89.82' y='73.54' width='12.39' height='12.49' fill='green'/>
    <path d='M102,77.79v12H90.07v-12H102m.5-.5H89.57v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-r01' x='104' y='44.96' width='12.39' height='12.49' fill='green'/>
    <path d='M116.14,49.21v12H104.25v-12h11.89m.5-.5H103.75v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-r11' x='104' y='59.25' width='12.39' height='12.49' fill='green'/>
    <path d='M116.14,63.5v12H104.25v-12h11.89m.5-.5H103.75V76h12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-r21' x='104' y='73.54' width='12.39' height='12.49' fill='green'/>
    <path d='M116.14,77.79v12H104.25v-12h11.89m.5-.5H103.75v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-r02' x='118.18' y='44.96' width='12.39' height='12.49' fill='green'/>
    <path d='M130.32,49.21v12H118.43v-12h11.89m.5-.5H117.93v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-r12' x='118.18' y='59.25' width='12.39' height='12.49' fill='green'/>
    <path d='M130.32,63.5v12H118.43v-12h11.89m.5-.5H117.93V76h12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-r22' x='118.18' y='73.54' width='12.39' height='12.49' fill='green'/>
    <path d='M130.32,77.79v12H118.43v-12h11.89m.5-.5H117.93v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='134.15' y='59.25' width='12.39' height='12.49' fill='white'/>
    <path d='M146.29,63.5v12H134.4v-12h11.89m.5-.5H133.9V76h12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='134.15' y='44.96' width='12.39' height='12.49' fill='white'/>
    <path d='M146.29,49.21v12H134.4v-12h11.89m.5-.5H133.9v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='134.15' y='73.54' width='12.39' height='12.49' fill='white'/>
    <path d='M146.29,77.79v12H134.4v-12h11.89m.5-.5H133.9v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='148.33' y='44.96' width='12.39' height='12.49' fill='white'/>
    <path d='M160.47,49.21v12H148.58v-12h11.89m.5-.5H148.08v13H161v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='148.33' y='59.25' width='12.39' height='12.49' fill='white'/>
    <path d='M160.47,63.5v12H148.58v-12h11.89m.5-.5H148.08V76H161V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='148.33' y='73.54' width='12.39' height='12.49' fill='white'/>
    <path d='M160.47,77.79v12H148.58v-12h11.89m.5-.5H148.08v13H161v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='162.51' y='44.96' width='12.39' height='12.49' fill='white'/>
    <path d='M174.65,49.21v12H162.76v-12h11.89m.5-.5H162.26v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='162.51' y='59.25' width='12.39' height='12.49' fill='white'/>
    <path d='M174.65,63.5v12H162.76v-12h11.89m.5-.5H162.26V76h12.89V63Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='162.51' y='73.54' width='12.39' height='12.49' fill='white'/>
    <path d='M174.65,77.79v12H162.76v-12h11.89m.5-.5H162.26v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='178.15' y='58.25' width='12.39' height='12.49' fill='red'/>
    <path d='M190.29,62.5v12H178.4v-12h11.89m.5-.5H177.9V75h12.89V62Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='178.15' y='43.96' width='12.39' height='12.49' fill='red'/>
    <path d='M190.29,48.21v12H178.4v-12h11.89m.5-.5H177.9v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='178.15' y='72.54' width='12.39' height='12.49' fill='red'/>
    <path d='M190.29,76.79v12H178.4v-12h11.89m.5-.5H177.9v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='192.33' y='43.96' width='12.39' height='12.49' fill='red'/>
    <path d='M204.47,48.21v12H192.58v-12h11.89m.5-.5H192.08v13H205v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='192.33' y='58.25' width='12.39' height='12.49' fill='red'/>
    <path d='M204.47,62.5v12H192.58v-12h11.89m.5-.5H192.08V75H205V62Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='192.33' y='72.54' width='12.39' height='12.49' fill='red'/>
    <path d='M204.47,76.79v12H192.58v-12h11.89m.5-.5H192.08v13H205v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='206.51' y='43.96' width='12.39' height='12.49' fill='red'/>
    <path d='M218.65,48.21v12H206.76v-12h11.89m.5-.5H206.26v13h12.89v-13Z' transform='translate(0 -4)'/>
    <rect class='cls-1' x='206.51' y='58.25' width='12.39' height='12.49' fill='red'/>
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