From b88cc7bf52940e9902decb67aa390f208872a1c8 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Fri, 29 Mar 2019 07:50:54 -0700
Subject: [PATCH] Fix invalid CGContext when invalidate layer (#24195)

Summary:
If size is zero, the `CGContext` would invalid, so we need to filter zero things.
cc. shergin

[iOS] [Fixed] - Fix invalid CGContext when invalidate layer
Pull Request resolved: https://github.com/facebook/react-native/pull/24195

Differential Revision: D14683396

Pulled By: shergin

fbshipit-source-id: b5b45fb86ca3158284281460cf1d95d1b22eab0d
---
 .../Mounting/ComponentViews/View/RCTViewComponentView.mm  | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm b/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
index fa0a7d2b066..581e4609800 100644
--- a/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
+++ b/React/Fabric/Mounting/ComponentViews/View/RCTViewComponentView.mm
@@ -356,11 +356,15 @@ static RCTBorderStyle RCTBorderStyleFromBorderStyle(BorderStyle borderStyle)
 
 - (void)invalidateLayer
 {
+  CALayer *layer = self.layer;
+
+  if (CGSizeEqualToSize(layer.bounds.size, CGSizeZero)) {
+    return;
+  }
+
   const auto borderMetrics =
       _props->resolveBorderMetrics(_layoutMetrics.layoutDirection == LayoutDirection::RightToLeft);
 
-  CALayer *layer = self.layer;
-
   // Stage 1. Shadow Path
   BOOL layerHasShadow = layer.shadowOpacity > 0 && CGColorGetAlpha(layer.shadowColor) > 0;
   if (layerHasShadow) {