1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2009 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 27 extern int SDL_CursorInit(Uint32 flags); 28 extern void SDL_CursorPaletteChanged(void); 29 extern void SDL_DrawCursor(SDL_Surface *screen); 30 extern void SDL_DrawCursorNoLock(SDL_Surface *screen); 31 extern void SDL_EraseCursor(SDL_Surface *screen); 32 extern void SDL_EraseCursorNoLock(SDL_Surface *screen); 33 extern void SDL_UpdateCursor(SDL_Surface *screen); 34 extern void SDL_ResetCursor(void); 35 extern void SDL_MoveCursor(int x, int y); 36 extern 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 43 extern 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 58 extern void SDL_LockCursor(void); 59 extern void SDL_UnlockCursor(void); 60 #endif /* INLINE_MOUSELOCK */ 61 62 /* Only for low-level mouse cursor drawing */ 63 extern SDL_Cursor *SDL_cursor; 64 extern 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 73 extern volatile int SDL_cursorstate; 74