更新

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

@@ -0,0 +1,44 @@
+import { isNodePattern, throwError } from '@jimp/utils';
+
+/**
+ * Flip the image horizontally
+ * @param {boolean} horizontal a Boolean, if true the image will be flipped horizontally
+ * @param {boolean} vertical a Boolean, if true the image will be flipped vertically
+ * @param {function(Error, Jimp)} cb (optional) a callback for when complete
+ * @returns {Jimp} this for chaining of methods
+ */
+function flipFn(horizontal, vertical, cb) {
+  if (typeof horizontal !== 'boolean' || typeof vertical !== 'boolean')
+    return throwError.call(
+      this,
+      'horizontal and vertical must be Booleans',
+      cb
+    );
+
+  const bitmap = Buffer.alloc(this.bitmap.data.length);
+  this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function(
+    x,
+    y,
+    idx
+  ) {
+    const _x = horizontal ? this.bitmap.width - 1 - x : x;
+    const _y = vertical ? this.bitmap.height - 1 - y : y;
+    const _idx = (this.bitmap.width * _y + _x) << 2;
+    const data = this.bitmap.data.readUInt32BE(idx);
+
+    bitmap.writeUInt32BE(data, _idx);
+  });
+
+  this.bitmap.data = Buffer.from(bitmap);
+
+  if (isNodePattern(cb)) {
+    cb.call(this, null, this);
+  }
+
+  return this;
+}
+
+export default () => ({
+  flip: flipFn,
+  mirror: flipFn
+});