Pass combinedAlpha when not complexContent.

Author: JoogabYun

src/lottie/lottieitem.cpp

@@ -1306,9 +1306,9 @@ renderer::Stroke::Stroke(model::Stroke *data)
 static vthread_local std::vector<float> Dash_Vector;
 
 bool renderer::Stroke::updateContent(int frameNo, const VMatrix &matrix,
-                                     float)
+                                     float alpha)
 {
-    auto combinedAlpha = mModel.opacity(frameNo);
+    auto combinedAlpha = alpha * mModel.opacity(frameNo);
     auto color = mModel.color(frameNo).toColor(combinedAlpha);
 
     VBrush brush(color);

src/lottie/lottieitem_capi.cpp

@@ -88,7 +88,7 @@ void renderer::Layer::buildLayerNode()
         mCApiData = std::make_unique<renderer::CApiData>();
         clayer().keypath = name();
     }
-    if (complexContent()) clayer().mAlpha = uint8_t(combinedAlpha() * 255.f);
+    if (!complexContent()) clayer().mAlpha = uint8_t(combinedAlpha() * 255.f);
     clayer().mVisible = visible();
     // update matte
     if (hasMatte()) {