print the GL version in use

[gltest.git] / glxbackend.cpp

diff --git a/glxbackend.cpp b/glxbackend.cpp
index a957e5bfeb8963618ba87f00a34394c7b0dd9c95..b2383826b66c257090493d5c530f09f27b2aa6c9 100644 (file)
--- a/glxbackend.cpp
+++ b/glxbackend.cpp
@@ -24,6 +24,10 @@
 #include <GL/glxext.h>
 #include <string>
 
+#if !defined(CON_GL1)
+#error "Valid GL contexts for GLX are: GL1"
+#endif
+
 // attributes for a double buffered visual in RGBA format with at least 4 bits per color
 static int attrList[] =                                             
 {
@@ -41,7 +45,7 @@ VisualID GLXBackend::initialize(Display *display)
                // debugging: show version information
                int glxMajor, glxMinor;
                glXQueryVersion(display, &glxMajor, &glxMinor);
-               printf("Using GLX version %d.%d\n", glxMajor, glxMinor);
+               printf("Using GLX version: %d.%d\n", glxMajor, glxMinor);
                // check for swap control functions
                const char *extensions = glXQueryExtensionsString(display, DefaultScreen(display));
                if (std::string(extensions).find("GLX_MESA_swap_control") != std::string::npos) {