tldraw/dist-esm/lib/shapes/shared/getBrowserCanvasMaxSize.mjs.map

A tiny little drawing editor.

{
  "version": 3,
  "sources": ["../../../../src/lib/shapes/shared/getBrowserCanvasMaxSize.tsx"],
  "sourcesContent": ["import canvasSize from 'canvas-size'\n\nexport interface CanvasMaxSize {\n\tmaxWidth: number\n\tmaxHeight: number\n\tmaxArea: number\n}\n\nlet maxSizePromise: Promise<CanvasMaxSize> | null = null\n\nfunction getBrowserCanvasMaxSize() {\n\tif (!maxSizePromise) {\n\t\tmaxSizePromise = calculateBrowserCanvasMaxSize()\n\t}\n\n\treturn maxSizePromise\n}\n\nasync function calculateBrowserCanvasMaxSize(): Promise<CanvasMaxSize> {\n\tconst maxWidth = await canvasSize.maxWidth({ usePromise: true })\n\tconst maxHeight = await canvasSize.maxHeight({ usePromise: true })\n\tconst maxArea = await canvasSize.maxArea({ usePromise: true })\n\treturn {\n\t\tmaxWidth: maxWidth.width,\n\t\tmaxHeight: maxHeight.height,\n\t\tmaxArea: maxArea.width * maxArea.height,\n\t}\n}\n\n// https://github.com/jhildenbiddle/canvas-size?tab=readme-ov-file#test-results\nconst MAX_SAFE_CANVAS_DIMENSION = 8192\nconst MAX_SAFE_CANVAS_AREA = 4096 * 4096\n\nexport async function clampToBrowserMaxCanvasSize(width: number, height: number) {\n\tif (\n\t\twidth <= MAX_SAFE_CANVAS_DIMENSION &&\n\t\theight <= MAX_SAFE_CANVAS_DIMENSION &&\n\t\twidth * height <= MAX_SAFE_CANVAS_AREA\n\t) {\n\t\treturn [width, height]\n\t}\n\n\tconst { maxWidth, maxHeight, maxArea } = await getBrowserCanvasMaxSize()\n\tconst aspectRatio = width / height\n\n\tif (width > maxWidth) {\n\t\twidth = maxWidth\n\t\theight = width / aspectRatio\n\t}\n\n\tif (height > maxHeight) {\n\t\theight = maxHeight\n\t\twidth = height * aspectRatio\n\t}\n\n\tif (width * height > maxArea) {\n\t\tconst ratio = Math.sqrt(maxArea / (width * height))\n\t\twidth *= ratio\n\t\theight *= ratio\n\t}\n\n\treturn [width, height]\n}\n"],
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