From f2c53ead8c21d510dbde0d8a21441bd5c7f8d301 Mon Sep 17 00:00:00 2001
From: Dylan McIntyre <dylan@dmcintyre.net>
Date: Sat, 28 Jan 2017 15:34:33 -0500
Subject: [PATCH] fix crash with no camera avail

---
 .../com/flurgle/camerakit/PreviewImpl.java    | 28 ++++++++++---------
 1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/camerakit/src/main/java/com/flurgle/camerakit/PreviewImpl.java b/camerakit/src/main/java/com/flurgle/camerakit/PreviewImpl.java
index 14b9c77a..67902178 100644
--- a/camerakit/src/main/java/com/flurgle/camerakit/PreviewImpl.java
+++ b/camerakit/src/main/java/com/flurgle/camerakit/PreviewImpl.java
@@ -67,19 +67,21 @@ public abstract class PreviewImpl {
         this.mTrueWidth = width;
         this.mTrueHeight = height;
 
-        AspectRatio aspectRatio = AspectRatio.of(width, height);
-        int targetHeight = (int) (getView().getWidth() * aspectRatio.toFloat());
-        float scaleY;
-        if (getView().getHeight() > 0) {
-            scaleY = (float) targetHeight / (float) getView().getHeight();
-        } else {
-            scaleY = 1;
-        }
-
-        if (scaleY > 1) {
-            getView().setScaleY(scaleY);
-        } else {
-            getView().setScaleX(1 / scaleY);
+        if (width != 0 && height != 0) {
+            AspectRatio aspectRatio = AspectRatio.of(width, height);
+            int targetHeight = (int) (getView().getWidth() * aspectRatio.toFloat());
+            float scaleY;
+            if (getView().getHeight() > 0) {
+                scaleY = (float) targetHeight / (float) getView().getHeight();
+            } else {
+                scaleY = 1;
+            }
+
+            if (scaleY > 1) {
+                getView().setScaleY(scaleY);
+            } else {
+                getView().setScaleX(1 / scaleY);
+            }
         }
     }