Integrated GLEW; began migration to Xlib

lib/graphicsdev/GLX.cpp

@@ -0,0 +1,34 @@
+#include "boo/graphicsdev/glxew.h"
+#include <LogVisor/LogVisor.hpp>
+
+namespace boo
+{
+static LogVisor::LogModule Log("boo::GLX");
+
+void GLXExtensionCheck()
+{
+    if (!GLXEW_SGI_video_sync)
+        Log.report(LogVisor::FatalError, "GLX_SGI_video_sync not available");
+    if (!GLXEW_EXT_swap_control && !GLXEW_MESA_swap_control && !GLXEW_SGI_swap_control)
+        Log.report(LogVisor::FatalError, "swap_control not available");
+}
+
+void GLXWaitForVSync()
+{
+    unsigned int sync;
+    int err = glXWaitVideoSyncSGI(1, 0, &sync);
+    if (err)
+        Log.report(LogVisor::FatalError, "wait err");
+}
+
+void GLXEnableVSync(Display* disp, GLXWindow drawable)
+{
+    if (GLXEW_EXT_swap_control)
+        glXSwapIntervalEXT(disp, drawable, 1);
+    else if (GLXEW_MESA_swap_control)
+        glXSwapIntervalMESA(1);
+    else if (GLXEW_SGI_swap_control)
+        glXSwapIntervalSGI(1);
+}
+
+}