From 728028563ce5b11ab814786c81e9d8fc70513595 Mon Sep 17 00:00:00 2001
From: Matthew Chen <charlesmchen@gmail.com>
Date: Thu, 24 Aug 2017 16:39:58 -0400
Subject: [PATCH] Add double-tap to zoom out.

// FREEBIE
---
 Signal/src/ViewControllers/CropScaleImageViewController.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Signal/src/ViewControllers/CropScaleImageViewController.swift b/Signal/src/ViewControllers/CropScaleImageViewController.swift
index 6b90c85a5..5eacf3534 100644
--- a/Signal/src/ViewControllers/CropScaleImageViewController.swift
+++ b/Signal/src/ViewControllers/CropScaleImageViewController.swift
@@ -335,7 +335,7 @@ class CropScaleImageViewController: OWSViewController {
                 let srcCropSizeAfterScalePoints = CGSize(width:srcDefaultCropSizePoints.width / imageScale,
                                                          height:srcDefaultCropSizePoints.height / imageScale)
                 // Since the translation state reflects the "upper left" corner of the crop region, we need to
-                // adjust the translation when scaling.
+                // adjust the translation when scaling to preserve the "center" of the crop region.
                 srcTranslation.x += (srcCropSizeBeforeScalePoints.width - srcCropSizeAfterScalePoints.width) * 0.5
                 srcTranslation.y += (srcCropSizeBeforeScalePoints.height - srcCropSizeAfterScalePoints.height) * 0.5