Mercurial > sdl-ios-xcode
annotate src/SDL.c @ 615:7ec821f3cbd0
Date: Thu, 17 Apr 2003 23:27:34 -0400
From: Darrell Walisser
Subject: Yet another OS X cursor bug
The synopsis:
1. Call SDL_ShowCursor(0);
2. Call SDL_SetVideoMode();
3. Call SDL_GetEvent();
3. Call SDL_ShowCursor(1);
The result: Sometimes the cursor doesn't come back! Ack! Oddly enough,
it does come back when mousing over the dock or clicking in the menu
bar. But that's besides the point.
The reason why this is happening is a flaw in the handling of
activation/deactivation events. The short explanation is that the
HideCursor() and ShowCursor() calls must be balanced, but if the cursor
was initially hidden, HideCursor() was called again on the activate
event - so now the next ShowCursor() fails (as does the next, and the
next, for some reason).
So, here's the patch. All it does is keep track of the
HideCursor()/ShowCursor() calls so that they will always be balanced.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 20 Apr 2003 05:41:16 +0000 |
| parents | 0ce5a68278fd |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Initialization code for SDL */ | |
| 29 | |
| 30 #include <stdlib.h> /* For getenv() */ | |
|
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31 #ifdef ENABLE_PTH |
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32 #include <pth.h> |
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33 #endif |
| 0 | 34 |
| 35 #include "SDL.h" | |
| 36 #include "SDL_endian.h" | |
| 37 #include "SDL_fatal.h" | |
| 38 #ifndef DISABLE_VIDEO | |
| 39 #include "SDL_leaks.h" | |
| 40 #endif | |
| 41 | |
| 42 /* Initialization/Cleanup routines */ | |
| 43 #ifndef DISABLE_JOYSTICK | |
| 44 extern int SDL_JoystickInit(void); | |
| 45 extern void SDL_JoystickQuit(void); | |
| 46 #endif | |
| 47 #ifndef DISABLE_CDROM | |
| 48 extern int SDL_CDROMInit(void); | |
| 49 extern void SDL_CDROMQuit(void); | |
| 50 #endif | |
| 51 #ifndef DISABLE_TIMERS | |
| 52 extern void SDL_StartTicks(void); | |
| 53 extern int SDL_TimerInit(void); | |
| 54 extern void SDL_TimerQuit(void); | |
| 55 #endif | |
| 56 | |
| 57 /* The current SDL version */ | |
| 58 static SDL_version version = | |
| 59 { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL }; | |
| 60 | |
| 61 /* The initialized subsystems */ | |
| 62 static Uint32 SDL_initialized = 0; | |
| 63 static Uint32 ticks_started = 0; | |
| 64 | |
| 65 #ifdef CHECK_LEAKS | |
| 66 int surfaces_allocated = 0; | |
| 67 #endif | |
| 68 | |
| 69 int SDL_InitSubSystem(Uint32 flags) | |
| 70 { | |
| 71 #ifndef DISABLE_VIDEO | |
| 72 /* Initialize the video/event subsystem */ | |
| 73 if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) { | |
| 74 if ( SDL_VideoInit(getenv("SDL_VIDEODRIVER"), | |
| 75 (flags&SDL_INIT_EVENTTHREAD)) < 0 ) { | |
| 76 return(-1); | |
| 77 } | |
| 78 SDL_initialized |= SDL_INIT_VIDEO; | |
| 79 } | |
| 80 #else | |
| 81 if ( flags & SDL_INIT_VIDEO ) { | |
| 82 SDL_SetError("SDL not built with video support"); | |
| 83 return(-1); | |
| 84 } | |
| 85 #endif | |
| 86 | |
| 87 #ifndef DISABLE_AUDIO | |
| 88 /* Initialize the audio subsystem */ | |
| 89 if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) { | |
| 90 if ( SDL_AudioInit(getenv("SDL_AUDIODRIVER")) < 0 ) { | |
| 91 return(-1); | |
| 92 } | |
| 93 SDL_initialized |= SDL_INIT_AUDIO; | |
| 94 } | |
| 95 #else | |
| 96 if ( flags & SDL_INIT_AUDIO ) { | |
| 97 SDL_SetError("SDL not built with audio support"); | |
| 98 return(-1); | |
| 99 } | |
| 100 #endif | |
| 101 | |
| 102 #ifndef DISABLE_TIMERS | |
| 103 /* Initialize the timer subsystem */ | |
| 104 if ( ! ticks_started ) { | |
| 105 SDL_StartTicks(); | |
| 106 ticks_started = 1; | |
| 107 } | |
| 108 if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) { | |
| 109 if ( SDL_TimerInit() < 0 ) { | |
| 110 return(-1); | |
| 111 } | |
| 112 SDL_initialized |= SDL_INIT_TIMER; | |
| 113 } | |
| 114 #else | |
| 115 if ( flags & SDL_INIT_TIMER ) { | |
| 116 SDL_SetError("SDL not built with timer support"); | |
| 117 return(-1); | |
| 118 } | |
| 119 #endif | |
| 120 | |
| 121 #ifndef DISABLE_JOYSTICK | |
| 122 /* Initialize the joystick subsystem */ | |
| 123 if ( (flags & SDL_INIT_JOYSTICK) && | |
| 124 !(SDL_initialized & SDL_INIT_JOYSTICK) ) { | |
| 125 if ( SDL_JoystickInit() < 0 ) { | |
| 126 return(-1); | |
| 127 } | |
| 128 SDL_initialized |= SDL_INIT_JOYSTICK; | |
| 129 } | |
| 130 #else | |
| 131 if ( flags & SDL_INIT_JOYSTICK ) { | |
| 132 SDL_SetError("SDL not built with joystick support"); | |
| 133 return(-1); | |
| 134 } | |
| 135 #endif | |
| 136 | |
| 137 #ifndef DISABLE_CDROM | |
| 138 /* Initialize the CD-ROM subsystem */ | |
| 139 if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) { | |
| 140 if ( SDL_CDROMInit() < 0 ) { | |
| 141 return(-1); | |
| 142 } | |
| 143 SDL_initialized |= SDL_INIT_CDROM; | |
| 144 } | |
| 145 #else | |
| 146 if ( flags & SDL_INIT_CDROM ) { | |
| 147 SDL_SetError("SDL not built with cdrom support"); | |
| 148 return(-1); | |
| 149 } | |
| 150 #endif | |
| 151 return(0); | |
| 152 } | |
| 153 | |
| 154 int SDL_Init(Uint32 flags) | |
| 155 { | |
| 397 | 156 #if !defined(DISABLE_THREADS) && defined(ENABLE_PTH) |
| 157 if (!pth_init()) { | |
| 158 return -1; | |
| 159 } | |
| 160 #endif | |
| 161 | |
| 0 | 162 /* Clear the error message */ |
| 163 SDL_ClearError(); | |
| 164 | |
| 165 /* Initialize the desired subsystems */ | |
| 166 if ( SDL_InitSubSystem(flags) < 0 ) { | |
| 167 return(-1); | |
| 168 } | |
| 169 | |
| 170 /* Everything is initialized */ | |
| 171 if ( !(flags & SDL_INIT_NOPARACHUTE) ) { | |
| 172 SDL_InstallParachute(); | |
| 173 } | |
| 174 return(0); | |
| 175 } | |
| 176 | |
| 177 void SDL_QuitSubSystem(Uint32 flags) | |
| 178 { | |
| 179 /* Shut down requested initialized subsystems */ | |
| 180 #ifndef DISABLE_CDROM | |
| 181 if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) { | |
| 182 SDL_CDROMQuit(); | |
| 183 SDL_initialized &= ~SDL_INIT_CDROM; | |
| 184 } | |
| 185 #endif | |
| 186 #ifndef DISABLE_JOYSTICK | |
| 187 if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) { | |
| 188 SDL_JoystickQuit(); | |
| 189 SDL_initialized &= ~SDL_INIT_JOYSTICK; | |
| 190 } | |
| 191 #endif | |
| 192 #ifndef DISABLE_TIMERS | |
| 193 if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) { | |
| 194 SDL_TimerQuit(); | |
| 195 SDL_initialized &= ~SDL_INIT_TIMER; | |
| 196 } | |
| 197 #endif | |
| 198 #ifndef DISABLE_AUDIO | |
| 199 if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) { | |
| 200 SDL_AudioQuit(); | |
| 201 SDL_initialized &= ~SDL_INIT_AUDIO; | |
| 202 } | |
| 203 #endif | |
| 204 #ifndef DISABLE_VIDEO | |
| 205 if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) { | |
| 206 SDL_VideoQuit(); | |
| 207 SDL_initialized &= ~SDL_INIT_VIDEO; | |
| 208 } | |
| 209 #endif | |
| 210 } | |
| 211 | |
| 212 Uint32 SDL_WasInit(Uint32 flags) | |
| 213 { | |
| 214 if ( ! flags ) { | |
| 215 flags = SDL_INIT_EVERYTHING; | |
| 216 } | |
| 217 return (SDL_initialized&flags); | |
| 218 } | |
| 219 | |
| 220 void SDL_Quit(void) | |
| 221 { | |
| 222 /* Quit all subsystems */ | |
| 223 SDL_QuitSubSystem(SDL_INIT_EVERYTHING); | |
| 224 | |
| 225 #ifdef CHECK_LEAKS | |
| 226 /* Print the number of surfaces not freed */ | |
| 227 if ( surfaces_allocated != 0 ) { | |
| 228 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n", | |
| 229 surfaces_allocated); | |
| 230 } | |
| 231 #endif | |
| 232 | |
| 233 /* Uninstall any parachute signal handlers */ | |
| 234 SDL_UninstallParachute(); | |
| 397 | 235 |
| 236 #if !defined(DISABLE_THREADS) && defined(ENABLE_PTH) | |
| 237 pth_kill(); | |
| 238 #endif | |
| 0 | 239 } |
| 240 | |
| 241 /* Return the library version number */ | |
| 242 const SDL_version * SDL_Linked_Version(void) | |
| 243 { | |
| 244 return(&version); | |
| 245 } | |
| 246 | |
|
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247 #if defined(_WIN32_WCE) || (defined(__WATCOMC__) && defined(BUILD_DLL)) |
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248 /* Need to include DllMain() on Windows CE and Watcom C for some reason.. */ |
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249 #include <windows.h> |
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250 |
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251 BOOL APIENTRY DllMain( HANDLE hModule, |
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252 DWORD ul_reason_for_call, |
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253 LPVOID lpReserved ) |
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254 { |
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255 switch (ul_reason_for_call) { |
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256 case DLL_PROCESS_ATTACH: |
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257 case DLL_THREAD_ATTACH: |
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258 case DLL_THREAD_DETACH: |
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259 case DLL_PROCESS_DETACH: |
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260 break; |
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261 } |
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262 return TRUE; |
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263 } |
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264 #endif /* _WIN32_WCE and building DLL with Watcom C */ |