*initHEADmaster

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diff --git a/source/3rd-party/SDL2/src/events/SDL_mouse_c.h b/source/3rd-party/SDL2/src/events/SDL_mouse_c.h
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+++ b/source/3rd-party/SDL2/src/events/SDL_mouse_c.h
@@ -0,0 +1,140 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../SDL_internal.h"
+
+#ifndef SDL_mouse_c_h_
+#define SDL_mouse_c_h_
+
+#include "SDL_mouse.h"
+
+typedef Uint32 SDL_MouseID;
+
+struct SDL_Cursor
+{
+    struct SDL_Cursor *next;
+    void *driverdata;
+};
+
+typedef struct
+{
+    int last_x, last_y;
+    Uint32 last_timestamp;
+    Uint8 click_count;
+} SDL_MouseClickState;
+
+typedef struct
+{
+    /* Create a cursor from a surface */
+    SDL_Cursor *(*CreateCursor) (SDL_Surface * surface, int hot_x, int hot_y);
+
+    /* Create a system cursor */
+    SDL_Cursor *(*CreateSystemCursor) (SDL_SystemCursor id);
+
+    /* Show the specified cursor, or hide if cursor is NULL */
+    int (*ShowCursor) (SDL_Cursor * cursor);
+
+    /* This is called when a mouse motion event occurs */
+    void (*MoveCursor) (SDL_Cursor * cursor);
+
+    /* Free a window manager cursor */
+    void (*FreeCursor) (SDL_Cursor * cursor);
+
+    /* Warp the mouse to (x,y) within a window */
+    void (*WarpMouse) (SDL_Window * window, int x, int y);
+
+    /* Warp the mouse to (x,y) in screen space */
+    int (*WarpMouseGlobal) (int x, int y);
+
+    /* Set relative mode */
+    int (*SetRelativeMouseMode) (SDL_bool enabled);
+
+    /* Set mouse capture */
+    int (*CaptureMouse) (SDL_Window * window);
+
+    /* Get absolute mouse coordinates. (x) and (y) are never NULL and set to zero before call. */
+    Uint32 (*GetGlobalMouseState) (int *x, int *y);
+
+    /* Data common to all mice */
+    SDL_MouseID mouseID;
+    SDL_Window *focus;
+    int x;
+    int y;
+    int xdelta;
+    int ydelta;
+    int last_x, last_y;         /* the last reported x and y coordinates */
+    float accumulated_wheel_x;
+    float accumulated_wheel_y;
+    Uint32 buttonstate;
+    SDL_bool has_position;
+    SDL_bool relative_mode;
+    SDL_bool relative_mode_warp;
+    float normal_speed_scale;
+    float relative_speed_scale;
+    float scale_accum_x;
+    float scale_accum_y;
+    Uint32 double_click_time;
+    int double_click_radius;
+    SDL_bool touch_mouse_events;
+
+    /* Data for double-click tracking */
+    int num_clickstates;
+    SDL_MouseClickState *clickstate;
+
+    SDL_Cursor *cursors;
+    SDL_Cursor *def_cursor;
+    SDL_Cursor *cur_cursor;
+    SDL_bool cursor_shown;
+
+    /* Driver-dependent data. */
+    void *driverdata;
+} SDL_Mouse;
+
+
+/* Initialize the mouse subsystem */
+extern int SDL_MouseInit(void);
+
+/* Get the mouse state structure */
+SDL_Mouse *SDL_GetMouse(void);
+
+/* Set the default mouse cursor */
+extern void SDL_SetDefaultCursor(SDL_Cursor * cursor);
+
+/* Set the mouse focus window */
+extern void SDL_SetMouseFocus(SDL_Window * window);
+
+/* Send a mouse motion event */
+extern int SDL_SendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y);
+
+/* Send a mouse button event */
+extern int SDL_SendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button);
+
+/* Send a mouse button event with a click count */
+extern int SDL_SendMouseButtonClicks(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button, int clicks);
+
+/* Send a mouse wheel event */
+extern int SDL_SendMouseWheel(SDL_Window * window, SDL_MouseID mouseID, float x, float y, SDL_MouseWheelDirection direction);
+
+/* Shutdown the mouse subsystem */
+extern void SDL_MouseQuit(void);
+
+#endif /* SDL_mouse_c_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */