From dad462258fae332f276d9a256892cc5fe9fe0c14 Mon Sep 17 00:00:00 2001
From: asmockler <asmockler@gmail.com>
Date: Mon, 25 Jan 2016 06:00:26 -0800
Subject: [PATCH] Ensure perspective value is non-zero

Summary:
Setting `transform: {perspective: 0}` was causing app failure due to `NaN` produced by divide by zero in [MatrixMath.js](https://github.com/facebook/react-native/blob/96553cf553e26e48a87f83030e04aef788f2dfef/Libraries/Utilities/MatrixMath.js#L118).

See issue #2616
Closes https://github.com/facebook/react-native/pull/5457

Reviewed By: svcscm

Differential Revision: D2851748

Pulled By: bestander

fb-gh-sync-id: d2872fb73b4d95ba0b6e5ed2bee814158645cf73
---
 Libraries/StyleSheet/processTransform.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Libraries/StyleSheet/processTransform.js b/Libraries/StyleSheet/processTransform.js
index 4666a30552..4a523f9091 100644
--- a/Libraries/StyleSheet/processTransform.js
+++ b/Libraries/StyleSheet/processTransform.js
@@ -165,6 +165,20 @@ function _validateTransform(key, value, transformation) {
         stringifySafe(transformation),
       );
       break;
+    case 'perspective':
+      invariant(
+        typeof value === 'number',
+        'Transform with key of "%s" must be a number: %s',
+        key,
+        stringifySafe(transformation),
+      );
+      invariant(
+        value !== 0,
+        'Transform with key of "%s" cannot be zero: %s',
+        key,
+        stringifySafe(transformation),
+      );
+      break;
     default:
       invariant(
         typeof value === 'number',