@tldraw/editor/dist-esm/lib/exports/getSvgAsImage.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../src/lib/exports/getSvgAsImage.ts"],
  "sourcesContent": ["import { FileHelpers, Image, PngHelpers, sleep } from '@tldraw/utils'\nimport { tlenv } from '../globals/environment'\nimport { clampToBrowserMaxCanvasSize } from '../utils/browserCanvasMaxSize'\nimport { debugFlags } from '../utils/debug-flags'\n\n/** @public */\nexport async function getSvgAsImage(\n\tsvgString: string,\n\toptions: {\n\t\ttype: 'png' | 'jpeg' | 'webp'\n\t\twidth: number\n\t\theight: number\n\t\tquality?: number\n\t\tpixelRatio?: number\n\t}\n) {\n\tconst { type, width, height, quality = 1, pixelRatio = 2 } = options\n\n\tlet [clampedWidth, clampedHeight] = clampToBrowserMaxCanvasSize(\n\t\twidth * pixelRatio,\n\t\theight * pixelRatio\n\t)\n\tclampedWidth = Math.floor(clampedWidth)\n\tclampedHeight = Math.floor(clampedHeight)\n\tconst effectiveScale = clampedWidth / width\n\n\t// usually we would use `URL.createObjectURL` here, but chrome has a bug where `blob:` URLs of\n\t// SVGs that use <foreignObject> mark the canvas as tainted, where data: ones do not.\n\t// https://issues.chromium.org/issues/41054640\n\tconst svgUrl = await FileHelpers.blobToDataUrl(new Blob([svgString], { type: 'image/svg+xml' }))\n\n\tconst canvas = await new Promise<HTMLCanvasElement | null>((resolve) => {\n\t\tconst image = Image()\n\t\timage.crossOrigin = 'anonymous'\n\n\t\timage.onload = async () => {\n\t\t\t// safari will fire `onLoad` before the fonts in the SVG are\n\t\t\t// actually loaded. just waiting around a while is brittle, but\n\t\t\t// there doesn't seem to be any better solution for now :( see\n\t\t\t// https://bugs.webkit.org/show_bug.cgi?id=219770\n\t\t\tif (tlenv.isSafari) {\n\t\t\t\tawait sleep(250)\n\t\t\t}\n\n\t\t\tconst canvas = document.createElement('canvas') as HTMLCanvasElement\n\t\t\tconst ctx = canvas.getContext('2d')!\n\n\t\t\tcanvas.width = clampedWidth\n\t\t\tcanvas.height = clampedHeight\n\n\t\t\tctx.imageSmoothingEnabled = true\n\t\t\tctx.imageSmoothingQuality = 'high'\n\t\t\tctx.drawImage(image, 0, 0, clampedWidth, clampedHeight)\n\n\t\t\tURL.revokeObjectURL(svgUrl)\n\n\t\t\tresolve(canvas)\n\t\t}\n\n\t\timage.onerror = () => {\n\t\t\tresolve(null)\n\t\t}\n\n\t\timage.src = svgUrl\n\t})\n\n\tif (!canvas) return null\n\n\tconst blob = await new Promise<Blob | null>((resolve) =>\n\t\tcanvas.toBlob(\n\t\t\t(blob) => {\n\t\t\t\tif (!blob || debugFlags.throwToBlob.get()) {\n\t\t\t\t\tresolve(null)\n\t\t\t\t}\n\t\t\t\tresolve(blob)\n\t\t\t},\n\t\t\t'image/' + type,\n\t\t\tquality\n\t\t)\n\t)\n\n\tif (!blob) return null\n\n\tif (type === 'png') {\n\t\tconst view = new DataView(await blob.arrayBuffer())\n\t\treturn PngHelpers.setPhysChunk(view, effectiveScale, {\n\t\t\ttype: 'image/' + type,\n\t\t})\n\t} else {\n\t\treturn blob\n\t}\n}\n"],
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  "names": ["canvas", "blob"]
}