balsam/iblbaker: Destroy offscreensurface with OpenGL

Fixes: QTBUG-122143
Pick-to: 6.5
Change-Id: I7af96ab6153acdf7d4467457177bbbaeb201b772
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
(cherry picked from commit 876118d48996f907342fadb83f162080a43ef479)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 2243829792320a42eb800065d476f54a5ab697e4)

1 files changed, 3 insertions, 1 deletions

diff --git a/src/iblbaker/qssgiblbaker.cpp b/src/iblbaker/qssgiblbaker.cpp
index 7a99a50c..71e3a983 100644
--- a/src/iblbaker/qssgiblbaker.cpp
+++ b/src/iblbaker/qssgiblbaker.cpp
@@ -657,7 +657,9 @@ QString renderToKTXFile(const QString &inPath, const QString &outPath)
             params.format.setVersion(3, 0);
         }
         params.fallbackSurface = QRhiGles2InitParams::newFallbackSurface();
-        return renderToKTXFileInternal("OpenGL", inPath, outPath, QRhi::OpenGLES2, &params);
+        const QString result = renderToKTXFileInternal("OpenGL", inPath, outPath, QRhi::OpenGLES2, &params);
+        delete params.fallbackSurface;
+        return result;
     }
 #endif