1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2012 Sam Lantinga
4
5    This library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9
10    This library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14
15    You should have received a copy of the GNU Lesser General Public
16    License along with this library; if not, write to the Free Software
17    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18
19    Sam Lantinga
20    slouken@libsdl.org
21*/
22#include "SDL_config.h"
23
24/* Useful variables and functions from SDL_cursor.c */
25#include "SDL_mouse.h"
26
27extern int  SDL_CursorInit(Uint32 flags);
28extern void SDL_CursorPaletteChanged(void);
29extern void SDL_DrawCursor(SDL_Surface *screen);
30extern void SDL_DrawCursorNoLock(SDL_Surface *screen);
31extern void SDL_EraseCursor(SDL_Surface *screen);
32extern void SDL_EraseCursorNoLock(SDL_Surface *screen);
33extern void SDL_UpdateCursor(SDL_Surface *screen);
34extern void SDL_ResetCursor(void);
35extern void SDL_MoveCursor(int x, int y);
36extern void SDL_CursorQuit(void);
37
38#define INLINE_MOUSELOCK
39#ifdef INLINE_MOUSELOCK
40/* Inline (macro) versions of the mouse lock functions */
41#include "SDL_mutex.h"
42
43extern SDL_mutex *SDL_cursorlock;
44
45#define SDL_LockCursor()						\
46	do {								\
47		if ( SDL_cursorlock ) {					\
48			SDL_mutexP(SDL_cursorlock);			\
49		}							\
50	} while ( 0 )
51#define SDL_UnlockCursor()						\
52	do {								\
53		if ( SDL_cursorlock ) {					\
54			SDL_mutexV(SDL_cursorlock);			\
55		}							\
56	} while ( 0 )
57#else
58extern void SDL_LockCursor(void);
59extern void SDL_UnlockCursor(void);
60#endif /* INLINE_MOUSELOCK */
61
62/* Only for low-level mouse cursor drawing */
63extern SDL_Cursor *SDL_cursor;
64extern void SDL_MouseRect(SDL_Rect *area);
65
66/* State definitions for the SDL cursor */
67#define CURSOR_VISIBLE	0x01
68#define CURSOR_USINGSW	0x10
69#define SHOULD_DRAWCURSOR(X) 						\
70			(((X)&(CURSOR_VISIBLE|CURSOR_USINGSW)) ==  	\
71					(CURSOR_VISIBLE|CURSOR_USINGSW))
72
73extern volatile int SDL_cursorstate;
74