更新

TongjiUniApp/node_modules/@jimp/plugin-invert/src/index.js

@@ -0,0 +1,26 @@
+import { isNodePattern } from '@jimp/utils';
+
+/**
+ * Inverts the image
+ * @param {function(Error, Jimp)} cb (optional) a callback for when complete
+ * @returns {Jimp} this for chaining of methods
+ */
+export default () => ({
+  invert(cb) {
+    this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function(
+      x,
+      y,
+      idx
+    ) {
+      this.bitmap.data[idx] = 255 - this.bitmap.data[idx];
+      this.bitmap.data[idx + 1] = 255 - this.bitmap.data[idx + 1];
+      this.bitmap.data[idx + 2] = 255 - this.bitmap.data[idx + 2];
+    });
+
+    if (isNodePattern(cb)) {
+      cb.call(this, null, this);
+    }
+
+    return this;
+  }
+});