added error check

2a13f016 · Robert Menzel · 70de835d · 2a13f016
Commit 2a13f016 authored Mar 20, 2015 by Robert Menzel
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Tools.cc src/ACGL/OpenGL/Tools.cc +4 -0

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--- a/src/ACGL/OpenGL/Tools.cc
+++ b/src/ACGL/OpenGL/Tools.cc
@@ -136,6 +136,10 @@ uint32_t privateGetOpenGLVersion( int _type )
        const GLubyte* versionString;
        versionString = glGetString(GL_VERSION);

+        if (versionString == NULL) {
+            ACGL::Utils::error() << "cannot get OpenGL version" << std::endl;
+            return 0;
+        }
        int positionOfFirstDot = 0;
        while ((versionString[positionOfFirstDot] != '\0') && (versionString[positionOfFirstDot] != '.')) ++positionOfFirstDot;