From e6ebc486e7d50480613ffadeb93de518c1711d41 Mon Sep 17 00:00:00 2001
From: Pingan Yi <pingany@gmail.com>
Date: Thu, 22 Jan 2015 18:46:02 +0800
Subject: [PATCH] Memory optimization for big image if rotation disabled

pe_rotatedImageWithtransform will consume much Memory
if original image is large.

if not rotation, pe_rotatedImageWithtransform are not needed.
---
 Lib/UIImage+PECrop.m | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Lib/UIImage+PECrop.m b/Lib/UIImage+PECrop.m
index ef389b8..fc356fc 100644
--- a/Lib/UIImage+PECrop.m
+++ b/Lib/UIImage+PECrop.m
@@ -13,8 +13,11 @@ @implementation UIImage (PECrop)
 - (UIImage *)rotatedImageWithtransform:(CGAffineTransform)rotation
                          croppedToRect:(CGRect)rect
 {
-    UIImage *rotatedImage = [self pe_rotatedImageWithtransform:rotation];
-    
+    UIImage *rotatedImage = self;
+    if (!CGAffineTransformIsIdentity(rotation)) {
+        rotatedImage = [self pe_rotatedImageWithtransform:rotation];
+    }
+
     CGFloat scale = rotatedImage.scale;
     CGRect cropRect = CGRectApplyAffineTransform(rect, CGAffineTransformMakeScale(scale, scale));