sw_engine: Added sanity checks.

This commit fixes crash when update target surface is not created yet.

diff --git a/src/lib/sw_engine/tvgSwRenderer.cpp b/src/lib/sw_engine/tvgSwRenderer.cpp
index de908c3297acf5dd9c922d64dd84b448c26b6aeb..ca4a1f0e7cc8c63d9258e5a17c91f04daacbef9e 100644 (file)
--- 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.