Allow mlkit textrecognition to work in landscape mode on iOS

Author: Nicolò Caruso

src/mlkit/mlkit-cameraview.ios.ts

@@ -97,6 +97,12 @@ export abstract class MLKitCameraView extends MLKitCameraViewBase {
       // this orientation is how the captured image is rotated (and shown)
       if (this.rotateRecording()) {
         this.cameraView.imageOrientation = UIImageOrientation.Right;
+      } else {
+        if (UIDevice.currentDevice.orientation === AVCaptureVideoOrientation.LandscapeLeft) {
+          this.cameraView.imageOrientation = UIImageOrientation.Up;
+        } else {
+          this.cameraView.imageOrientation = UIImageOrientation.Down;
+        }
       }
 
       this.cameraView.delegate = TNSMLKitCameraViewDelegateImpl.createWithOwnerResultCallbackAndOptions(
@@ -116,6 +122,17 @@ export abstract class MLKitCameraView extends MLKitCameraViewBase {
         this.previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.Portrait;
       }
     }
+
+    // this orientation is how the captured image is rotated (and shown)
+    if (this.rotateRecording()) {
+      this.cameraView.imageOrientation = UIImageOrientation.Right;
+    } else {
+      if (UIDevice.currentDevice.orientation === AVCaptureVideoOrientation.LandscapeLeft) {
+        this.cameraView.imageOrientation = UIImageOrientation.Up;
+      } else {
+        this.cameraView.imageOrientation = UIImageOrientation.Down;
+      }
+    }
   }
 
   public onLayout(left: number, top: number, right: number, bottom: number): void {

src/mlkit/textrecognition/index.ios.ts

@@ -1,3 +1,4 @@
+import { ios as iosUtils } from "tns-core-modules/utils/utils";
 import { ImageSource } from "tns-core-modules/image-source";
 import { MLKitVisionOptions } from "../";
 import { MLKitRecognizeTextCloudOptions, MLKitRecognizeTextOnDeviceOptions, MLKitRecognizeTextResult } from "./";
@@ -25,6 +26,9 @@ export class MLKitTextRecognition extends MLKitTextRecognitionBase {
   }
 
   protected rotateRecording(): boolean {
+    if (iosUtils.isLandscape()) {
+      return false;
+    }
     return true;
   }
 }