0527-datalad-test/.cache/yarn/v6/npm-bitmap-sdf-1.0.3-c99913e5729357a6fd350de34158180c013880b2-integrity/node_modules/bitmap-sdf/.yarn-metadata.json

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    "name": "bitmap-sdf",
    "version": "1.0.3",
    "description": "Calculate SDF for image/bw-data/array",
    "main": "index.js",
    "dependencies": {
      "clamp": "^1.0.1"
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    "devDependencies": {
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    "scripts": {
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      "signed-distance",
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    "author": {
      "name": "Dima Yv",
      "email": "dfcreative@gmail.com"
    },
    "license": "MIT",
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      "url": "https://github.com/dfcreative/bitmap-sdf/issues"
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    "readme": "# bitmap-sdf [![unstable](https://img.shields.io/badge/stability-unstable-green.svg)](http://github.com/badges/stability-badges)\n\nCalculate signed distance field for an image / bw-data. Fork of [tiny-sdf](https://github.com/mapbox/tiny-sdf) with reduced API.\n\n![bitmap-sdf](https://raw.githubusercontent.com/dfcreative/bitmap-sdf/master/preview.png)\n\n[Demo](https://dfcreative.github.io/bitmap-sdf/)\n\n## Usage\n\n[![npm install bitmap-sdf](https://nodei.co/npm/bitmap-sdf.png?mini=true)](https://npmjs.org/package/bitmap-sdf/)\n\n```js\nlet calcSdf = requrie('bitmap-sdf')\n\n//draw image\nlet canvas = document.body.appendChild(document.createElement('canvas'))\nlet w = canvas.width = 200, h = canvas.height = 200\nlet ctx = canvas.getContext('2d')\nctx.fillStyle = 'white'\nctx.font = 'bold 30px sans-serif'\nctx.fillText('X', 20, 20)\n\n//calculate distances\nlet distances = calcSdf(canvas)\n\n//show distances\nlet imgArr = new Uint8ClampedArray(w*h*4)\nfor (let i = 0; i < w; i++) {\n\tfor (let j = 0; j < h; j++) {\n\t\timgArr[j*w*4 + i*4 + 0] = arr[j*w+i]*255\n\t\timgArr[j*w*4 + i*4 + 1] = arr[j*w+i]*255\n\t\timgArr[j*w*4 + i*4 + 2] = arr[j*w+i]*255\n\t\timgArr[j*w*4 + i*4 + 3] = 255\n\t}\n}\nvar data = new ImageData(imgArr, w, h)\nctx.putImageData(data, 0, 0)\n```\n\n### dist = calcSdf(source, options?)\n\nCalculate distance field for the input `source` data, based on `options`. Returns 1-channel array with distance values from `0..1` range.\n\n#### Source:\n\nType | Meaning\n---|---\n_Canvas_, _Context2D_ | Calculates sdf for the full canvas image data based on `options.channel`, by default `0`, ie. red channel.\n_ImageData_ | Calculates sdf for the image data based on `options.channel`\n_Uint8ClampedArray_, _Uint8Array_ | Handles raw pixel data, requires `options.width` and `options.height`. Stride is detected from `width` and `height`.\n_Float32Array_, _Array_ | Handles raw numbers from `0..1` range, requires `options.width` and `options.height`. Stride is detected from `width` and `height`.\n\n#### Options:\n\nProperty | Default | Meaning\n---|---|---\n`cutoff` | `0.25` | Cutoff parameter, balance between SDF inside `1` and outside `0` of glyph\n`radius` | `10` | Max length of SDF, ie. the size of SDF around the `cutoff`\n`width` | `canvas.width` | Width of input data, if array\n`height` | `canvas.height` | Height of input data, if array\n`channel` | `0` | Channel number, `0` is red, `1` is green, `2` is blue, `3` is alpha.\n`stride` | `null` | Explicitly indicate number of channels per pixel. Not needed if `height` and `width` are provided.\n\n## See also\n\n* [font-atlas-sdf](https://github.com/hughsk/font-atlas-sdf) − generate sdf atlas for a font.\n* [tiny-sdf](https://github.com/mapbox/tiny-sdf) − fast glyph signed distance field generation.\n* [optical-properties](https://github.com/dfcreative/optical-properties) − glyph optical center and bounding box calculation\n\n## License\n\n(c) 2017 Dima Yv. MIT License\n\nDevelopment supported by plot.ly.\n"
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