Avoid crash when processing a captured image fails (#93)

app/proguard-rules.pro

@@ -26,3 +26,5 @@
 
 -keep class org.fairscan.app.RecentDocument* { *; }
 -keepclassmembers class * extends com.google.protobuf.GeneratedMessageLite { *; }
+# to have at least org.opencv.core.CvException
+-keep class org.opencv.core.** { *; }

app/src/main/java/org/fairscan/app/ui/screens/camera/CameraViewModel.kt

@@ -116,10 +116,15 @@ class CameraViewModel(appContainer: AppContainer): ViewModel() {
     fun onImageCaptured(imageProxy: ImageProxy?) {
         if (imageProxy != null) {
             viewModelScope.launch {
-                val source = imageProxy.toBitmap()
-                val page = processCapturedImage(source, imageProxy.imageInfo.rotationDegrees)
-                imageProxy.close()
-                onCaptureProcessed(page)
+                try {
+                    val source = imageProxy.toBitmap()
+                    val page = processCapturedImage(source, imageProxy.imageInfo.rotationDegrees)
+                    imageProxy.close()
+                    onCaptureProcessed(page)
+                } catch (e: RuntimeException) {
+                    logger.e("Camera", "Failed to process captured image", e)
+                    onCaptureProcessed(null)
+                }
             }
         } else {
             onCaptureProcessed(null)