More work on SDL events. Also fixed an issue (very old?) where Grafx2 didn't accurately follow mouse movements when it's very busy, ie when using Continuous Freehand with a large brush or transparency. Now, as long as the setting Merge mouse is zero, all intermediate mouse positions are correctly buffered and played back. From my testing, up to 7 seconds will be memorized.

git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1568 416bcca6-2ee7-4201-b75f-2eb2f807beb1

src/engine.h

@@ -112,5 +112,17 @@ void Pixel_background(int x_pos, int y_pos, byte color);
 /// Used when hovering the menu palette.
 void Status_print_palette_color(byte color);
 
+/// Puts the user in wait mode for the specified time ( in 1/100s),
+/// though the mouse still works.
 void Delay_with_active_mouse(int delay);
+
+///
+/// Activate the timer that runs Push_timer_event()
+/// This function can safely be called while it's active.
+void Activate_timer(int speed);
+
+///
+/// Remove the running timer that runs Push_timer_event()
+/// This function can safely be called while it's disabled.
+void Disable_timer(void);
 #endif