node_modules/@jimp/plugin-mask/README.md

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  <h1>@jimp/plugin-mask</h1>
  <p>mask an image with another image.</p>
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Masks a source image on to this image using average pixel colour. A completely black pixel on the mask will turn a pixel in the image completely transparent.

- [mask](http://jimp-dev.github.io/jimp/api/jimp/classes/jimp#mask)