progs/perf: added PerfExtensionSupported() helper

progs/perf/glmain.c

@@ -165,6 +165,13 @@ PerfReshapeWindow( unsigned w, unsigned h )
 }
 
 
+GLboolean
+PerfExtensionSupported(const char *ext)
+{
+   return glutExtensionSupported(ext);
+}
+
+
 static void
 Idle(void)
 {

progs/perf/glmain.h

@@ -49,6 +49,9 @@ PerfShaderProgram(const char *vertShader, const char *fragShader);
 extern int
 PerfReshapeWindow( unsigned w, unsigned h );
 
+extern GLboolean
+PerfExtensionSupported(const char *ext);
+
 
 /** Test programs must implement these functions **/