From 77c758939d173f1ae16d13687c25923c116ed046 Mon Sep 17 00:00:00 2001
From: Ken Martin <ken.martin@kitware.com>
Date: Tue, 30 Apr 2019 11:31:25 -0400
Subject: [PATCH] clamp the image diff gain to not overflow
Otherwise the diff image can overflow and misrepresent
the differences.
---
Testing/Rendering/vtkTesting.cxx | 1 +
1 file changed, 1 insertion(+)
diff --git a/Testing/Rendering/vtkTesting.cxx b/Testing/Rendering/vtkTesting.cxx
index 943e91a43f4..5031810e7b3 100644
--- a/Testing/Rendering/vtkTesting.cxx
+++ b/Testing/Rendering/vtkTesting.cxx
@@ -776,6 +776,7 @@ int vtkTesting::RegressionTest(vtkAlgorithm* imageSource,
rtGamma->SetInputConnection(rtId->GetOutputPort());
rtGamma->SetShift(0);
rtGamma->SetScale(10);
+ rtGamma->ClampOverflowOn();
vtkNew<vtkPNGWriter> rtPngw;
rtPngw->SetFileName(diffFilename.c_str());
--
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