From c025df684a5a107df9357139f4419efb2293ed04 Mon Sep 17 00:00:00 2001
From: Jehan <jehan.tremback@gmail.com>
Date: Wed, 15 Jul 2015 23:56:42 -0700
Subject: [PATCH] improve memory usage of rotation

---
 RCTCameraManager.m | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/RCTCameraManager.m b/RCTCameraManager.m
index d19a143..c5b690d 100644
--- a/RCTCameraManager.m
+++ b/RCTCameraManager.m
@@ -323,24 +323,29 @@ RCT_EXPORT_METHOD(stopCapture) {
         NSMutableDictionary *imageMetadata = [(NSDictionary *) CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(source, 0, NULL)) mutableCopy];
 
         // create cgimage
-        CGImageRef cgImage;
-        cgImage = CGImageSourceCreateImageAtIndex(source, 0, NULL);
+        CGImageRef CGImage;
+        CGImage = CGImageSourceCreateImageAtIndex(source, 0, NULL);
 
+        // Rotate it
+        CGImageRef rotatedCGImage;
         if ([options objectForKey:@"rotation"]) {
           float rotation = [[options objectForKey:@"rotation"] floatValue];
-          cgImage = [self CGImageRotatedByAngle:cgImage angle:rotation];
+          rotatedCGImage = [self newCGImageRotatedByAngle:CGImage angle:rotation];
         } else {
           // Get metadata orientation
           int metadataOrientation = [[imageMetadata objectForKey:(NSString *)kCGImagePropertyOrientation] intValue];
 
           if (metadataOrientation == 6) {
-            cgImage = [self CGImageRotatedByAngle:cgImage angle:270];
+            rotatedCGImage = [self newCGImageRotatedByAngle:CGImage angle:270];
           } else if (metadataOrientation == 1) {
-            cgImage = [self CGImageRotatedByAngle:cgImage angle:0];
+            rotatedCGImage = [self newCGImageRotatedByAngle:CGImage angle:0];
           } else if (metadataOrientation == 3) {
-            cgImage = [self CGImageRotatedByAngle:cgImage angle:180];
+            rotatedCGImage = [self newCGImageRotatedByAngle:CGImage angle:180];
+          } else {
+            rotatedCGImage = [self newCGImageRotatedByAngle:CGImage angle:0];
           }
         }
+        CGImageRelease(CGImage);
 
         // Erase metadata orientation
         [imageMetadata removeObjectForKey:(NSString *)kCGImagePropertyOrientation];
@@ -353,11 +358,12 @@ RCT_EXPORT_METHOD(stopCapture) {
         // Create destination thing
         NSMutableData *rotatedImageData = [NSMutableData data];
         CGImageDestinationRef destination = CGImageDestinationCreateWithData((CFMutableDataRef)rotatedImageData, CGImageSourceGetType(source), 1, NULL);
+        CFRelease(source);
         // add the image to the destination, reattaching metadata
-        CGImageDestinationAddImage(destination, cgImage, (CFDictionaryRef) imageMetadata);
+        CGImageDestinationAddImage(destination, rotatedCGImage, (CFDictionaryRef) imageMetadata);
         // And write
         CGImageDestinationFinalize(destination);
-
+        CFRelease(destination);
 
         if (rotatedImageData) {
           [self saveImage:rotatedImageData target:target metadata:imageMetadata callback:callback];
@@ -366,9 +372,7 @@ RCT_EXPORT_METHOD(stopCapture) {
           callback(@[RCTMakeError(error.description, nil, nil)]);
         }
 
-        CGImageRelease(cgImage);
-        CFRelease(source);
-        CFRelease(destination);
+        CGImageRelease(rotatedCGImage);
       }];
     }
   });
@@ -407,7 +411,7 @@ RCT_EXPORT_METHOD(stopCapture) {
   callback(@[[NSNull null], responseString]);
 }
 
-- (CGImageRef)CGImageRotatedByAngle:(CGImageRef)imgRef angle:(CGFloat)angle
+- (CGImageRef)newCGImageRotatedByAngle:(CGImageRef)imgRef angle:(CGFloat)angle
 {
   CGFloat angleInRadians = angle * (M_PI / 180);
   CGFloat width = CGImageGetWidth(imgRef);