Merge pull request #1290 from Snapp-FidMe/force_portrait_on_ios

Add ability to force portrait orientation on IOS

docs/RNCamera.md

@@ -246,6 +246,8 @@ Supported options:
 
  - `exif` (boolean true or false) Use this with `true` if you want a exif data map of the picture taken on the return data of your promise. If no value is specified `exif:false` is used.
 
+ - `forceUpOrientation` (iOS only, boolean true or false). This property allows to force portrait orientation based on actual data instead of exif data.
+
 The promise will be fulfilled with an object with some of the following properties:
 
  - `width`: returns the image's width (taking image orientation into account)

ios/RN/RNCamera.m

@@ -324,6 +324,9 @@ static NSDictionary *defaultFaceDetectorOptions = nil;
             if ([options[@"mirrorImage"] boolValue]) {
                 takenImage = [RNImageUtils mirrorImage:takenImage];
             }
+            if ([options[@"forceUpOrientation"] boolValue]) {
+                takenImage = [RNImageUtils forceUpOrientation:takenImage];
+            }
             
             NSMutableDictionary *response = [[NSMutableDictionary alloc] init];
             float quality = [options[@"quality"] floatValue];
@@ -336,6 +339,8 @@ static NSDictionary *defaultFaceDetectorOptions = nil;
             if ([options[@"base64"] boolValue]) {
                 response[@"base64"] = [takenImageData base64EncodedStringWithOptions:0];
             }
+
+            
             
             if ([options[@"exif"] boolValue]) {
                 int imageRotation;

ios/RN/RNImageUtils.h

@@ -14,6 +14,7 @@
 + (UIImage *)generatePhotoOfSize:(CGSize)size;
 + (UIImage *)cropImage:(UIImage *)image toRect:(CGRect)rect;
 + (UIImage *)mirrorImage:(UIImage *)image;
++ (UIImage *)forceUpOrientation:(UIImage *)image;
 + (NSString *)writeImage:(NSData *)image toPath:(NSString *)path;
 + (void)updatePhotoMetadata:(CMSampleBufferRef)imageSampleBuffer withAdditionalData:(NSDictionary *)additionalData inResponse:(NSMutableDictionary *)response;
 

ios/RN/RNImageUtils.m

@@ -68,6 +68,17 @@
     return [fileURL absoluteString];
 }
 
++ (UIImage *)forceUpOrientation:(UIImage *)image
+{
+    if (image.imageOrientation != UIImageOrientationUp) {
+        UIGraphicsBeginImageContextWithOptions(image.size, NO, image.scale);
+        [image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
+        image = UIGraphicsGetImageFromCurrentImageContext();
+        UIGraphicsEndImageContext();
+    }
+    return image;
+} 
+
 + (void)updatePhotoMetadata:(CMSampleBufferRef)imageSampleBuffer withAdditionalData:(NSDictionary *)additionalData inResponse:(NSMutableDictionary *)response
 {
     CFDictionaryRef exifAttachments = CMGetAttachment(imageSampleBuffer, kCGImagePropertyExifDictionary, NULL);