Hi,
we had (again) a customer with an older Quadro graphics board which unfortunately does not even support vertex array objects. As there was no check for their support before calling the appropriate GL functions, I added 2 tests for their extension (GL_ARB_vertex_array_object) to make sure the application does not crash. Code it attached.
Regards,
Michael
@@ -653,6 +653,12 @@ UInt32 Geometry::handleVAOGL(DrawEnv *pEnv,
Window *pWin = pEnv->getWindow();
GLHandlerOptions glOptions = { uiOptions };
+ if(!pWin->hasExtension("GL_ARB_vertex_array_object"))
+ {
+ SWARNING << "Geometry::handleAttDestroyGL: Extension: GL_ARB_vertex_array_object not supported!" << std::endl;
+ return 0;
+ }
+
if(mode == Window::initialize || mode == Window::needrefresh ||
mode == Window::reinitialize)
{
@@ -721,6 +727,12 @@ void Geometry::handleVAODestroyGL(DrawEnv *pEnv,
UInt32 glid;
Window *pWin = pEnv->getWindow();
+ if(!pWin->hasExtension("GL_ARB_vertex_array_object"))
+ {
+ SWARNING << "Geometry::handleAttDestroyGL: Extension: GL_ARB_vertex_array_object not supported!" << std::endl;
+ return;
+ }
+
if(mode == Window::destroy)
{
OSGGETGLFUNCBYID_GL3_ES(glDeleteVertexArrays,
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