Mercurial > sdl-ios-xcode
annotate src/thread/generic/SDL_sysmutex.c @ 664:abfdc08eb289
Date: Sun, 3 Aug 2003 22:07:57 +0200
From: Max Horn
Subject: SDL OSX fullscreen FIX
the attached patch fixes the fullscreen problems on SDL/OSX. The cause
was that click events are bounded by winRect. Now, winRect is set to
the size of the video surface. But if you e.g. request a 640x420
surface, you might get a 640x480 "real" surface. Still,
SDL_VideoSurface->h will be set to 420! Thus, the upper 60 pixels in my
example received no mouse down events.
My fix simply disables this clipping when in full screen mode - after
all, all clicks then should be inside the screen surface. Higher SDL
functions ensure that the coordinates then are clipped to 640x420. It
works fine in all my tests here. I don't know if it's the right thing
to do in multi screen scenarios, though.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 04 Aug 2003 01:00:30 +0000 |
| parents | f6ffac90895c |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
297
f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents:
252
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changeset
|
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 | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* An implementation of mutexes using semaphores */ | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <stdlib.h> | |
| 32 | |
| 33 #include "SDL_error.h" | |
| 34 #include "SDL_thread.h" | |
| 35 #include "SDL_systhread_c.h" | |
| 36 | |
| 37 | |
| 38 struct SDL_mutex { | |
| 39 int recursive; | |
| 40 Uint32 owner; | |
| 41 SDL_sem *sem; | |
| 42 }; | |
| 43 | |
| 44 /* Create a mutex */ | |
| 45 SDL_mutex *SDL_CreateMutex(void) | |
| 46 { | |
| 47 SDL_mutex *mutex; | |
| 48 | |
| 49 /* Allocate mutex memory */ | |
| 50 mutex = (SDL_mutex *)malloc(sizeof(*mutex)); | |
| 51 if ( mutex ) { | |
| 52 /* Create the mutex semaphore, with initial value 1 */ | |
| 53 mutex->sem = SDL_CreateSemaphore(1); | |
| 54 mutex->recursive = 0; | |
| 55 mutex->owner = 0; | |
| 56 if ( ! mutex->sem ) { | |
| 57 free(mutex); | |
| 58 mutex = NULL; | |
| 59 } | |
| 60 } else { | |
| 61 SDL_OutOfMemory(); | |
| 62 } | |
| 63 return mutex; | |
| 64 } | |
| 65 | |
| 66 /* Free the mutex */ | |
| 67 void SDL_DestroyMutex(SDL_mutex *mutex) | |
| 68 { | |
| 69 if ( mutex ) { | |
| 70 if ( mutex->sem ) { | |
| 71 SDL_DestroySemaphore(mutex->sem); | |
| 72 } | |
| 73 free(mutex); | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 /* Lock the semaphore */ | |
| 78 int SDL_mutexP(SDL_mutex *mutex) | |
| 79 { | |
| 80 #ifdef DISABLE_THREADS | |
| 81 return 0; | |
| 82 #else | |
| 83 Uint32 this_thread; | |
| 84 | |
| 85 if ( mutex == NULL ) { | |
| 86 SDL_SetError("Passed a NULL mutex"); | |
| 87 return -1; | |
| 88 } | |
| 89 | |
| 90 this_thread = SDL_ThreadID(); | |
| 91 if ( mutex->owner == this_thread ) { | |
| 92 ++mutex->recursive; | |
| 93 } else { | |
| 94 /* The order of operations is important. | |
| 95 We set the locking thread id after we obtain the lock | |
| 96 so unlocks from other threads will fail. | |
| 97 */ | |
| 98 SDL_SemWait(mutex->sem); | |
| 99 mutex->owner = this_thread; | |
| 100 mutex->recursive = 0; | |
| 101 } | |
| 102 | |
| 103 return 0; | |
| 104 #endif /* DISABLE_THREADS */ | |
| 105 } | |
| 106 | |
| 107 /* Unlock the mutex */ | |
| 108 int SDL_mutexV(SDL_mutex *mutex) | |
| 109 { | |
| 110 #ifdef DISABLE_THREADS | |
| 111 return 0; | |
| 112 #else | |
| 113 if ( mutex == NULL ) { | |
| 114 SDL_SetError("Passed a NULL mutex"); | |
| 115 return -1; | |
| 116 } | |
| 117 | |
| 118 /* If we don't own the mutex, we can't unlock it */ | |
| 119 if ( SDL_ThreadID() != mutex->owner ) { | |
| 120 SDL_SetError("mutex not owned by this thread"); | |
| 121 return -1; | |
| 122 } | |
| 123 | |
| 124 if ( mutex->recursive ) { | |
| 125 --mutex->recursive; | |
| 126 } else { | |
| 127 /* The order of operations is important. | |
| 128 First reset the owner so another thread doesn't lock | |
| 129 the mutex and set the ownership before we reset it, | |
| 130 then release the lock semaphore. | |
| 131 */ | |
| 132 mutex->owner = 0; | |
| 133 SDL_SemPost(mutex->sem); | |
| 134 } | |
| 135 return 0; | |
| 136 #endif /* DISABLE_THREADS */ | |
| 137 } |