Explicitly specify image rotation from EXIF

(SubsamplingScaleImageView.ORIENTATION_USE_EXIF doesn't always work for custom storage locations)

Author: MHShetty

app/src/main/java/app/grapheneos/camera/ktx/SubsamplingScaleImageView.kt

@@ -7,19 +7,42 @@ import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
 
 fun SubsamplingScaleImageView.fixOrientationForImage(imageUri: Uri) {
     val exifOrientation = getImageOrientationFromUri(context, imageUri)
-    orientation = SubsamplingScaleImageView.ORIENTATION_USE_EXIF
     when (exifOrientation) {
         ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> {
             scaleX = -1f
+            orientation = SubsamplingScaleImageView.ORIENTATION_0
         }
+
         ExifInterface.ORIENTATION_FLIP_VERTICAL -> {
             scaleY = -1f
+            orientation = SubsamplingScaleImageView.ORIENTATION_0
         }
+
         ExifInterface.ORIENTATION_TRANSVERSE -> {
             scaleX = -1f
+            orientation = SubsamplingScaleImageView.ORIENTATION_270
         }
+
         ExifInterface.ORIENTATION_TRANSPOSE -> {
             scaleX = -1f
+            orientation = SubsamplingScaleImageView.ORIENTATION_90
+        }
+
+        ExifInterface.ORIENTATION_ROTATE_90 -> {
+            orientation = SubsamplingScaleImageView.ORIENTATION_90
         }
+
+        ExifInterface.ORIENTATION_ROTATE_180 -> {
+            orientation = SubsamplingScaleImageView.ORIENTATION_180
+        }
+
+        ExifInterface.ORIENTATION_ROTATE_270 -> {
+            orientation = SubsamplingScaleImageView.ORIENTATION_270
+        }
+
+        // ExifInterface.ORIENTATION_NORMAL and ExifInterface.ORIENTATION_UNDEFINED
+        // don't need any handling as the image would be as expected (or the orientation
+        // would be unknown which is unlikely since all the images displayed in our in-app
+        // gallery are generated by our camera app)
     }
 }