From 44fb60938a66e3f0774a86c92b7acfe3827f93a1 Mon Sep 17 00:00:00 2001
From: Valentin Shergin <shergin@fb.com>
Date: Fri, 7 Sep 2018 11:12:23 -0700
Subject: [PATCH] Fabric: Fixed `colorComponentsFromColor` to able to accept
 empty color object

Summary:
@public
Empty (nullptr) color should be treated as `Clear` color ({0, 0, 0, 0} - black, fully tranparent), so `colorComponentsFromColor()` was changed to accomodate this (previously it crashed).

Reviewed By: rsnara

Differential Revision: D9631865

fbshipit-source-id: e211f34a89e9f5f86d9fca2789c7163db4feaab1
---
 ReactCommon/fabric/graphics/platform/ios/Color.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ReactCommon/fabric/graphics/platform/ios/Color.cpp b/ReactCommon/fabric/graphics/platform/ios/Color.cpp
index db03a0f4a..0682a7938 100644
--- a/ReactCommon/fabric/graphics/platform/ios/Color.cpp
+++ b/ReactCommon/fabric/graphics/platform/ios/Color.cpp
@@ -27,6 +27,11 @@ SharedColor colorFromComponents(ColorComponents components) {
 }
 
 ColorComponents colorComponentsFromColor(SharedColor color) {
+  if (!color) {
+    // Empty color object can be considered as `clear` (black, fully transparent) color.
+    return ColorComponents {0, 0, 0, 0};
+  }
+
   int numberOfComponents = CGColorGetNumberOfComponents(color.get());
   assert(numberOfComponents == 4);
   const CGFloat *components = CGColorGetComponents(color.get());