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feat(mirror): add option to give "mirrorImage" flag to takePicture.

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This commit is contained in:
Joao Fidelis 2018-02-14 10:48:21 -02:00
parent 077b0091ed
commit 0b6f0abda0
4 changed files with 43 additions and 0 deletions
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10
android/src/main/java/org/reactnative/camera/tasks/ResolveTakenPictureAsyncTask.java
View File

@ -73,6 +73,10 @@ public class ResolveTakenPictureAsyncTask extends AsyncTask<Void, Void, Writable
mBitmap = rotateBitmap(mBitmap, getImageRotation(orientation));
}
if (mOptions.hasKey("mirrorImage") && mOptions.getBoolean("mirrorImage")) {
mBitmap = flipHorizontally(mBitmap);
}
// Write Exif data to the response if requested
if (mOptions.hasKey("exif") && mOptions.getBoolean("exif")) {
WritableMap exifData = RNCameraViewHelper.getExifData(exifInterface);
@ -133,6 +137,12 @@ public class ResolveTakenPictureAsyncTask extends AsyncTask<Void, Void, Writable
return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
private Bitmap flipHorizontally(Bitmap source) {
Matrix matrix = new Matrix();
matrix.preScale(-1.0f, 1.0f);
return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
// Get rotation degrees from Exif orientation enum
private int getImageRotation(int orientation) {

9
ios/RN/RNCamera.m
View File

@ -322,6 +322,10 @@ static NSDictionary *defaultFaceDetectorOptions = nil;
CGRect cropRect = CGRectMake(frame.origin.x * width, frame.origin.y * height, frame.size.width * width, frame.size.height * height);
takenImage = [RNImageUtils cropImage:takenImage toRect:cropRect];
if ([options[@"mirrorImage"] boolValue]) {
takenImage = [RNImageUtils mirrorImage:takenImage];
}
NSMutableDictionary *response = [[NSMutableDictionary alloc] init];
float quality = [options[@"quality"] floatValue];
NSData *takenImageData = UIImageJPEGRepresentation(takenImage, quality);
@ -338,16 +342,21 @@ static NSDictionary *defaultFaceDetectorOptions = nil;
int imageRotation;
switch (takenImage.imageOrientation) {
case UIImageOrientationLeft:
case UIImageOrientationRightMirrored:
imageRotation = 90;
break;
case UIImageOrientationRight:
case UIImageOrientationLeftMirrored:
imageRotation = -90;
break;
case UIImageOrientationDown:
case UIImageOrientationDownMirrored:
imageRotation = 180;
break;
case UIImageOrientationUpMirrored:
default:
imageRotation = 0;
break;
}
[RNImageUtils updatePhotoMetadata:imageSampleBuffer withAdditionalData:@{ @"Orientation": @(imageRotation) } inResponse:response]; // TODO
}

1
ios/RN/RNImageUtils.h
View File

@ -13,6 +13,7 @@
+ (UIImage *)generatePhotoOfSize:(CGSize)size;
+ (UIImage *)cropImage:(UIImage *)image toRect:(CGRect)rect;
+ (UIImage *)mirrorImage:(UIImage *)image;
+ (NSString *)writeImage:(NSData *)image toPath:(NSString *)path;
+ (void)updatePhotoMetadata:(CMSampleBufferRef)imageSampleBuffer withAdditionalData:(NSDictionary *)additionalData inResponse:(NSMutableDictionary *)response;

23
ios/RN/RNImageUtils.m
View File

@ -38,6 +38,29 @@
return image;
}
+ (UIImage *)mirrorImage:(UIImage *)image
{
UIImageOrientation flippedOrientation = UIImageOrientationUpMirrored;
switch (image.imageOrientation) {
case UIImageOrientationDown:
flippedOrientation = UIImageOrientationDownMirrored;
break;
case UIImageOrientationLeft:
flippedOrientation = UIImageOrientationRightMirrored;
break;
case UIImageOrientationUp:
flippedOrientation = UIImageOrientationUpMirrored;
break;
case UIImageOrientationRight:
flippedOrientation = UIImageOrientationLeftMirrored;
break;
default:
break;
}
UIImage * flippedImage = [UIImage imageWithCGImage:image.CGImage scale:image.scale orientation:flippedOrientation];
return flippedImage;
}
+ (NSString *)writeImage:(NSData *)image toPath:(NSString *)path
{
[image writeToFile:path atomically:YES];