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diff --git a/platform/linux/xenv.h b/platform/linux/xenv.h
index 948381e..6abda19 100644
--- a/platform/linux/xenv.h
+++ b/platform/linux/xenv.h
@@ -1,5 +1,18 @@
 
-int  xenv_init(void);
-int  xenv_update(int *is_down);
+#define XENV_CAP_KEYS	(1<<0)
+#define XENV_CAP_MOUSE	(1<<1)
+
+/* xenv_flags specify if we need keys and mouse,
+ * on return, flag is removed if input is not available */
+int  xenv_init(int *xenv_flags, const char *window_title);
+
+/* read events from X, calling key_cb for key, mouseb_cb for mouse button
+ * and mousem_cb for mouse motion events */
+int  xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
+		 int (*mouseb_cb)(void *cb_arg, int x, int y, int button, int is_pressed),
+		 int (*mousem_cb)(void *cb_arg, int x, int y),
+		 void *cb_arg);
+
+int  xenv_minimize(void);
 void xenv_finish(void);