From 29ed3a7bca29bffa50a4a2d5f72c71fe54c16f86 Mon Sep 17 00:00:00 2001 From: Mike Lynch Date: Mon, 27 Jan 2025 15:14:06 +1100 Subject: [PATCH] Generates PNG using resvg-js --- package-lock.json | 203 ++++++++++++++++++++++++++++++++++++++++++++++ package.json | 1 + poptimal.js | 38 ++++++--- 3 files changed, 232 insertions(+), 10 deletions(-) diff --git a/package-lock.json b/package-lock.json index 65c2984..559aa87 100644 --- a/package-lock.json +++ b/package-lock.json @@ -6,6 +6,7 @@ "": { "dependencies": { "@observablehq/framework": "^1.13.0", + "@resvg/resvg-js": "^2.6.2", "d3": "^7.9.0", "d3-color": "^3.1.0", "d3-dsv": "^3.0.1", @@ -736,6 +737,208 @@ "node": ">=14" } }, + "node_modules/@resvg/resvg-js": { + "version": "2.6.2", + "resolved": "https://registry.npmjs.org/@resvg/resvg-js/-/resvg-js-2.6.2.tgz", + "integrity": "sha512-xBaJish5OeGmniDj9cW5PRa/PtmuVU3ziqrbr5xJj901ZDN4TosrVaNZpEiLZAxdfnhAe7uQ7QFWfjPe9d9K2Q==", + "engines": { + "node": ">= 10" + }, + "optionalDependencies": 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"^7.9.0", "d3-color": "^3.1.0", "d3-dsv": "^3.0.1", diff --git a/poptimal.js b/poptimal.js index 9ef97d5..92f9014 100644 --- a/poptimal.js +++ b/poptimal.js @@ -1,12 +1,14 @@ +import { Resvg } from "@resvg/resvg-js"; - +import { promises } from "fs"; import jsdom from "jsdom"; import * as d3 from "d3"; const { JSDOM } = jsdom; + const xmlns = "http://www.w3.org/2000/xmlns/"; const xlinkns = "http://www.w3.org/1999/xlink"; const svgns = "http://www.w3.org/2000/svg"; @@ -17,18 +19,14 @@ const document = window.document; import {RADIUS_OPTS, DotMaker} from './src/components/dots.js'; -//import {PALETTES, DotControls} from './src/components/controls.js'; +import {PALETTES} from './src/components/palettes.js'; const CELL = 10; const MAG = 2; const WIDTH = 20; const HEIGHT = WIDTH; - - - - -function poptimal() { +function poptimal_svg() { const container = d3.select(document.body).append("div"); const dm = new DotMaker(WIDTH); @@ -88,9 +86,29 @@ function poptimal() { node.setAttributeNS(xmlns, "xmlns", svgns); node.setAttributeNS(xmlns, "xmlns:xlink", xlinkns); const serializer = new window.XMLSerializer; - console.log(serializer.serializeToString(node)); + return serializer.serializeToString(node); -// console.log(download_as_svg(svg)); } -poptimal(); \ No newline at end of file +async function main() { + const svg = poptimal_svg(); + const opts = { + background: 'rgba(255, 255, 255, 1.0)', + fitTo: { + mode: 'width', + value: 1200, + }, + }; + const resvg = new Resvg(svg, opts) + const pngData = resvg.render() + const pngBuffer = pngData.asPng() + + console.info('Original SVG Size:', `${resvg.width} x ${resvg.height}`) + console.info('Output PNG Size :', `${pngData.width} x ${pngData.height}`) + + await promises.writeFile('test.png', pngBuffer); +} + + + +main(); \ No newline at end of file