From 3f3b5a621da7ce39f82c4706aae58c83f3eb74a2 Mon Sep 17 00:00:00 2001
From: Kristian Bendiksen <kristian.bendiksen@gmail.com>
Date: Mon, 8 Apr 2024 12:21:02 +0200
Subject: [PATCH] #11334 Fix cvf::Viewport assert triggered for small contour
 map/2d intersection

Size of the overlay is could become negative, and would overflow for small views.

Fixes #11334.
---
 ApplicationLibCode/UserInterface/RiuViewer.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ApplicationLibCode/UserInterface/RiuViewer.cpp b/ApplicationLibCode/UserInterface/RiuViewer.cpp
index c929010946..dbbe9b31e2 100644
--- a/ApplicationLibCode/UserInterface/RiuViewer.cpp
+++ b/ApplicationLibCode/UserInterface/RiuViewer.cpp
@@ -790,7 +790,7 @@ void RiuViewer::updateLegendLayout()
             {
                 int legendWidth = prefSize.x();
                 legend->setLayoutFixedPosition( cvf::Vec2i( xPos, yPos ) );
-                legend->setRenderSize( cvf::Vec2ui( legendWidth, viewPortHeight - 2 * border - 2 * edgeAxisBorderHeight ) );
+                legend->setRenderSize( cvf::Vec2ui( legendWidth, std::max( 0, viewPortHeight - 2 * border - 2 * edgeAxisBorderHeight ) ) );
                 xPos += legendWidth + border;
             }
             else
@@ -858,7 +858,7 @@ void RiuViewer::updateLegendLayout()
             {
                 int legendWidth = prefSize.x();
                 legend->setLayoutFixedPosition( cvf::Vec2i( xPos - legendWidth, yPos ) );
-                legend->setRenderSize( cvf::Vec2ui( legendWidth, viewPortHeight - yPosStart - border - edgeAxisBorderHeight ) );
+                legend->setRenderSize( cvf::Vec2ui( legendWidth, std::max( 0, viewPortHeight - yPosStart - border - edgeAxisBorderHeight ) ) );
                 xPos -= legendWidth + border;
             }
             else