From: Viktor UZLOV <vuzlov@salomex.nnov.opencascade.com>
Date: Wed, 5 May 2021 14:00:10 +0000 (+0300)
Subject: Prevent VTK view becoming transparent when rendering transparent objects, when using... 
X-Git-Tag: V9_7_0rc1~1
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=9dbf92a7ba561692a7304101d4ab2ea2e7a7e04f;p=modules%2Fgui.git

Prevent VTK view becoming transparent when rendering transparent objects, when using MESA
---

diff --git a/src/SVTK/SVTK_ViewWindow.cxx b/src/SVTK/SVTK_ViewWindow.cxx
index 67fccd088..bc5c84550 100644
--- a/src/SVTK/SVTK_ViewWindow.cxx
+++ b/src/SVTK/SVTK_ViewWindow.cxx
@@ -112,6 +112,9 @@
 #include <GL/gl.h>
 #endif
 
+// Use workaround for rendering transparent object over MESA
+#defing USE_WORKAROUND_FOR_MESA
+
 namespace SVTK
 {
   int convertAction( const int accelAction )
@@ -251,6 +254,11 @@ void SVTK_ViewWindow::Initialize(SVTK_ViewModelBase* theModel)
   myKeyFreeInteractorStyle->AddObserver(SVTK::OperationFinished,
                                         myEventCallbackCommand.GetPointer(), 0.0);
 
+#ifdef USE_WORKAROUND_FOR_MESA
+  char *mesavar = getenv("SALOME_USE_MESA");
+  if (mesavar)
+    getRenderer()->SetUseDepthPeeling(1);
+#endif //USE_WORKAROUND_FOR_MESA
 
   getRenderer()->SetBackgroundAlpha(1.0);
   myInteractor->getRenderWindow()->SetMultiSamples(0);