From 2f334f50c59e37127fd5751c15457551f2ae64dd Mon Sep 17 00:00:00 2001
From: Michal Szczecinski <mihashco89@gmail.com>
Date: Thu, 29 Apr 2021 10:49:38 +0200
Subject: [PATCH] sw_engine: Added sanity checks.

This commit fixes crash when update target surface is not created yet.
---
 src/lib/sw_engine/tvgSwRenderer.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lib/sw_engine/tvgSwRenderer.cpp b/src/lib/sw_engine/tvgSwRenderer.cpp
index de908c32..ca4a1f0e 100644
--- a/src/lib/sw_engine/tvgSwRenderer.cpp
+++ b/src/lib/sw_engine/tvgSwRenderer.cpp
@@ -328,6 +328,8 @@ bool SwRenderer::renderImage(RenderData data)
 bool SwRenderer::renderShape(RenderData data)
 {
     auto task = static_cast<SwShapeTask*>(data);
+    if (!task) return false;
+
     task->done();
 
     if (task->opacity == 0) return true;
@@ -513,6 +515,7 @@ bool SwRenderer::dispose(RenderData data)
 
 void* SwRenderer::prepareCommon(SwTask* task, const RenderTransform* transform, uint32_t opacity, const Array<RenderData>& clips, RenderUpdateFlag flags)
 {
+    if (!surface) return task;
     if (flags == RenderUpdateFlag::None) return task;
 
     //Finish previous task if it has duplicated request.