From 2250084176f540c89024261a4f5ae292ba883063 Mon Sep 17 00:00:00 2001
From: Magne Sjaastad <magne.sjaastad@ceetronsolutions.com>
Date: Tue, 6 Feb 2024 14:38:38 +0100
Subject: [PATCH] Always link shader program if OglId is zero

The OpenGL resources can be invalidated at any time. Make sure that the shader program is linked if this happens.
---
 Fwk/VizFwk/LibRender/cvfOverlayImage.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Fwk/VizFwk/LibRender/cvfOverlayImage.cpp b/Fwk/VizFwk/LibRender/cvfOverlayImage.cpp
index 3b72f7118f..074d3466a1 100644
--- a/Fwk/VizFwk/LibRender/cvfOverlayImage.cpp
+++ b/Fwk/VizFwk/LibRender/cvfOverlayImage.cpp
@@ -230,6 +230,10 @@ void OverlayImage::render(OpenGLContext* oglContext, const Vec2i& position, cons
 
             gen.addFragmentCode(ShaderSourceRepository::fs_Unlit);
             m_shaderProgram = gen.generate();
+        }
+
+        if (m_shaderProgram->programOglId() == 0)
+        {
             m_shaderProgram->linkProgram(oglContext);
         }