fix: 微信登录补充保存username和role

node_modules/pixelmatch/README.md

@@ -0,0 +1,109 @@
+## pixelmatch
+
+[![Build Status](https://travis-ci.org/mapbox/pixelmatch.svg?branch=master)](https://travis-ci.org/mapbox/pixelmatch)
+[![Coverage Status](https://coveralls.io/repos/mapbox/pixelmatch/badge.svg?branch=master&service=github)](https://coveralls.io/github/mapbox/pixelmatch?branch=master)
+[![](https://img.shields.io/badge/simply-awesome-brightgreen.svg)](https://github.com/mourner/projects)
+
+The smallest, simplest and fastest JavaScript pixel-level image comparison library,
+originally created to compare screenshots in tests.
+
+Features accurate **anti-aliased pixels detection**
+and **perceptual color difference metrics**.
+
+Inspired by [Resemble.js](https://github.com/Huddle/Resemble.js)
+and [Blink-diff](https://github.com/yahoo/blink-diff).
+Unlike these libraries, pixelmatch is around **90 lines of code**,
+has **no dependencies**, and works on **raw arrays** of image data,
+so it's **blazing fast** and can be used in **any environment** (Node or browsers).
+
+```js
+var numDiffPixels = pixelmatch(img1, img2, diff, 800, 600, {threshold: 0.1});
+```
+
+Implements ideas from the following papers:
+
+- [Measuring perceived color difference using YIQ NTSC transmission color space in mobile applications](http://www.progmat.uaem.mx:8080/artVol2Num2/Articulo3Vol2Num2.pdf) (2010, Yuriy Kotsarenko, Fernando Ramos)
+- [Anti-aliased pixel and intensity slope detector](http://www.ee.ktu.lt/journal/2009/7/25_ISSN_1392-1215_Anti-aliased%20Pxel%20and%20Intensity%20Slope%20Detector.pdf) (2009, Vytautas Vyšniauskas)
+
+### Example output
+
+| expected | actual | diff |
+| --- | --- | --- |
+| ![](test/fixtures/4a.png) | ![](test/fixtures/4b.png) | ![1diff](test/fixtures/4diff.png) |
+| ![](test/fixtures/3a.png) | ![](test/fixtures/3b.png) | ![1diff](test/fixtures/3diff.png) |
+| ![](test/fixtures/1a.png) | ![](test/fixtures/1b.png) | ![1diff](test/fixtures/1diff.png) |
+
+### API
+
+#### pixelmatch(img1, img2, output, width, height[, options])
+
+- `img1`, `img2` — Image data of the images to compare (`Buffer` or `Uint8Array`).
+- `output` — Image data to write the diff to, or `null` if don't need a diff image.
+- `width`, `height` — Width and height of the images. Note that _all three images_ need to have the same dimensions.
+
+`options` is an object literal with the following properties:
+
+- `threshold` — Matching threshold, ranges from `0` to `1`. Smaller values make the comparison more sensitive. `0.1` by default.
+- `includeAA` — If `true`, disables detecting and ignoring anti-aliased pixels. `false` by default.
+
+Compares two images, writes the output diff and returns the number of mismatched pixels.
+
+### Command line
+
+Pixelmatch comes with a binary that works with PNG images:
+
+```bash
+pixelmatch image1.png image2.png output.png 0.1
+```
+
+### Example usage
+
+#### Node.js
+
+```js
+var fs = require('fs'),
+    PNG = require('pngjs').PNG,
+    pixelmatch = require('pixelmatch');
+
+var img1 = fs.createReadStream('img1.png').pipe(new PNG()).on('parsed', doneReading),
+    img2 = fs.createReadStream('img2.png').pipe(new PNG()).on('parsed', doneReading),
+    filesRead = 0;
+
+function doneReading() {
+    if (++filesRead < 2) return;
+    var diff = new PNG({width: img1.width, height: img1.height});
+
+    pixelmatch(img1.data, img2.data, diff.data, img1.width, img1.height, {threshold: 0.1});
+
+    diff.pack().pipe(fs.createWriteStream('diff.png'));
+}
+```
+
+#### Browsers
+
+```js
+var img1 = img1Ctx.getImageData(0, 0, width, height),
+    img2 = img2Ctx.getImageData(0, 0, width, height),
+    diff = diffCtx.createImageData(width, height);
+
+pixelmatch(img1.data, img2.data, diff.data, width, height, {threshold: 0.1});
+
+diffCtx.putImageData(diff, 0, 0);
+```
+
+### Install
+
+Install with NPM:
+
+```bash
+npm install pixelmatch
+```
+
+To build a browser-compatible version, clone the repository locally, then run:
+
+```bash
+npm install -g browserify
+browserify -s pixelmatch index.js > pixelmatch.js
+```
+
+### [Changelog](https://github.com/mapbox/pixelmatch/releases)