From af3440fa3a0e1ffec95daa5ffaf25ebb590fbcfe Mon Sep 17 00:00:00 2001
From: ful1e5 <24286590+ful1e5@users.noreply.github.com>
Date: Mon, 31 Aug 2020 12:39:41 +0530
Subject: [PATCH] =?UTF-8?q?=F0=9F=96=BC=20Frame=20Processing=20util?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/common/src/utils/matchImages.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 packages/common/src/utils/matchImages.ts

diff --git a/packages/common/src/utils/matchImages.ts b/packages/common/src/utils/matchImages.ts
new file mode 100644
index 00000000..f4127d6a
--- /dev/null
+++ b/packages/common/src/utils/matchImages.ts
@@ -0,0 +1,19 @@
+import { PNG } from "pngjs";
+import pixelmatch from "pixelmatch";
+
+interface MatchImagesArgs {
+  img1Buff: Buffer;
+  img2Buff: Buffer;
+}
+
+export const matchImages = ({ img1Buff, img2Buff }: MatchImagesArgs) => {
+  const img1 = PNG.sync.read(img1Buff);
+  const img2 = PNG.sync.read(img2Buff);
+  const { width, height } = img1;
+
+  const diff = new PNG({ width, height });
+
+  return pixelmatch(img1.data, img2.data, diff.data, width, height, {
+    threshold: 0.25
+  });
+};