add compiz-xfce-emerald script

compiz-xfce-emerald

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+function runCompiz() {
+    emerald --replace &
+    exec compiz --replace ccp $@
+}
+
+ISSW=`glxinfo | grep "Software Rasterizer" -c`
+
+# Try with direct rendering
+HAVETFP=`glxinfo | grep texture_from_pixmap -c`
+
+if ( [ $ISSW == 0 ] && [ $HAVETFP -gt 2 ] ); then 
+	runCompiz $@
+fi
+
+# Try again with indirect rendering
+export LIBGL_ALWAYS_INDIRECT=1
+
+HAVETFP=`glxinfo | grep texture_from_pixmap -c`
+
+if ( [ $ISSW == 0 ] && [ $HAVETFP -gt 2 ] ); then 
+	runCompiz $@
+fi
+
+# Fall back to xfwm4
+exec xfwm4 $@
+