opengl: don't forget to call swapBuffers when paint ends

Change-Id: I05a2dc1c36d5f23ee43bb799f28fc2403743a4c1
(cherry picked from commit bbb8c66ed976a1eaddd92400eb31462bed182be4)
Reviewed-on: https://gerrit.libreoffice.org/16917
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/vcl/opengl/gdiimpl.cxx b/vcl/opengl/gdiimpl.cxx
index f56dd4af2a38..3ab4e093849b 100644
--- a/vcl/opengl/gdiimpl.cxx
+++ b/vcl/opengl/gdiimpl.cxx
@@ -1825,6 +1825,7 @@ void OpenGLSalGraphicsImpl::endPaint()
         mpContext->makeCurrent();
         mpContext->AcquireDefaultFramebuffer();
         glFlush();
+        mpContext->swapBuffers();
     }
 
     CHECK_GL_ERROR();