Mercurial > sdl-ios-xcode
annotate src/thread/beos/SDL_syssem.c @ 1192:54aa9aa32327
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Fri, 18 Nov 2005 23:39:02 +0100
Subject: [SDL] Mouse position bugs on Mac OS X
The attached patch fixes a few bugs in SDL related to the mouse position
in windowed mode on Mac OS X, reproduced using the attached minimal test
program - at least here on 10.3.9, with SDL CVS from today. Could anyone
test whether the bugs exist and are fixed by the patch on 10.2 and 10.4?
1. When using OpenGL, the vertical mouse positions obtained through
events or SDL_GetMouseState() are off by one.
2. When using OpenGL, SDL_WarpMouse() inverts the y coordinate.
3. Clicks on the topmost pixel row of the window are not recognized.
1 and 2 do not occur in non-OpenGL mode, while 3 does. All three only
occur in windowed mode, not in fullscreen.
The cause for 1 and 3 is that in Cocoa, "the location of the mouse"
seems to be defined as "the location of the top left corner of the mouse
pointer's hot pixel" (this is not documented, it's just what I found out
here), which together with the fact that Cocoa's usual y coordinates
start at the bottom and increase upwards means that the y coordinate of
the mouse runs from 1 to h, not from 0 to h-1, in a window of height h.
If it does work on 10.2 and 10.4 (I'll try to test it as soon as I can,
but at the moment all I have at hand is 10.3.9), can this be applied to
the CVS?
-Christian
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Mon, 28 Nov 2005 10:41:51 +0100
Subject: [SDL] Re: Mouse position bugs on Mac OS X
I wrote:
> I'll try to test it as soon as I can, but at the moment all I have at hand is 10.3.9
So, here are the results of my tests (with patched and unpatched
frameworks compiled with Xcode 1.5 (gcc 3.3) on 10.3.9):
On 10.1.5, my test program doesn't run because of "Undefined symbols:
SDL undefined reference to _CGMainDisplayID expected to be defined in
Carbon". I guess not supporting 10.1 was a deliberate decision then and
that's OK with me.
On 10.2.8, 10.3.9, and 10.4.0, the bugs exist as described in my
original post and are fixed by my patch. That is, there is no difference
between pre/post 10.3 and the patched version works correctly in all
combinations of GL/non-GL and windowed/fullscreen.
I therefore recommend the patch for inclusion.
-Christian
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 28 Nov 2005 13:58:26 +0000 |
| parents | ab0154afe938 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
3 Copyright (C) 1997-2004 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:
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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 /* Semaphores in the BeOS environment */ | |
| 29 | |
| 30 #include <be/kernel/OS.h> | |
| 31 | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_thread.h" | |
| 34 | |
| 35 | |
| 36 struct SDL_semaphore { | |
| 37 sem_id id; | |
| 38 }; | |
| 39 | |
| 40 /* Create a counting semaphore */ | |
| 41 SDL_sem *SDL_CreateSemaphore(Uint32 initial_value) | |
| 42 { | |
| 43 SDL_sem *sem; | |
| 44 | |
| 45 sem = (SDL_sem *)malloc(sizeof(*sem)); | |
| 46 if ( sem ) { | |
| 47 sem->id = create_sem(initial_value, "SDL semaphore"); | |
| 48 if ( sem->id < B_NO_ERROR ) { | |
| 49 SDL_SetError("create_sem() failed"); | |
| 50 free(sem); | |
| 51 sem = NULL; | |
| 52 } | |
| 53 } else { | |
| 54 SDL_OutOfMemory(); | |
| 55 } | |
| 56 return(sem); | |
| 57 } | |
| 58 | |
| 59 /* Free the semaphore */ | |
| 60 void SDL_DestroySemaphore(SDL_sem *sem) | |
| 61 { | |
| 62 if ( sem ) { | |
| 63 if ( sem->id >= B_NO_ERROR ) { | |
| 64 delete_sem(sem->id); | |
| 65 } | |
| 66 free(sem); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout) | |
| 71 { | |
| 72 int32 val; | |
| 73 int retval; | |
| 74 | |
| 75 if ( ! sem ) { | |
| 76 SDL_SetError("Passed a NULL semaphore"); | |
| 77 return -1; | |
| 78 } | |
| 79 | |
| 80 tryagain: | |
| 81 if ( timeout == SDL_MUTEX_MAXWAIT ) { | |
| 82 val = acquire_sem(sem->id); | |
| 83 } else { | |
| 84 timeout *= 1000; /* BeOS uses a timeout in microseconds */ | |
| 85 val = acquire_sem_etc(sem->id, 1, B_RELATIVE_TIMEOUT, timeout); | |
| 86 } | |
| 87 switch (val) { | |
| 88 case B_INTERRUPTED: | |
| 89 goto tryagain; | |
| 90 case B_NO_ERROR: | |
| 91 retval = 0; | |
| 92 break; | |
|
1146
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
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93 case B_TIMED_OUT: |
|
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
94 retval = SDL_MUTEX_TIMEDOUT; |
|
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
95 break; |
|
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
96 case B_WOULD_BLOCK: |
|
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
97 retval = SDL_MUTEX_TIMEDOUT; |
|
ab0154afe938
Date: Sat, 17 Sep 2005 13:38:49 +0200
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
98 break; |
| 0 | 99 default: |
| 100 SDL_SetError("acquire_sem() failed"); | |
| 101 retval = -1; | |
| 102 break; | |
| 103 } | |
| 104 | |
| 105 return retval; | |
| 106 } | |
| 107 | |
| 108 int SDL_SemTryWait(SDL_sem *sem) | |
| 109 { | |
| 110 return SDL_SemWaitTimeout(sem, 0); | |
| 111 } | |
| 112 | |
| 113 int SDL_SemWait(SDL_sem *sem) | |
| 114 { | |
| 115 return SDL_SemWaitTimeout(sem, SDL_MUTEX_MAXWAIT); | |
| 116 } | |
| 117 | |
| 118 /* Returns the current count of the semaphore */ | |
| 119 Uint32 SDL_SemValue(SDL_sem *sem) | |
| 120 { | |
| 121 int32 count; | |
| 122 Uint32 value; | |
| 123 | |
| 124 value = 0; | |
| 125 if ( sem ) { | |
| 126 get_sem_count(sem->id, &count); | |
| 127 if ( count > 0 ) { | |
| 128 value = (Uint32)count; | |
| 129 } | |
| 130 } | |
| 131 return value; | |
| 132 } | |
| 133 | |
| 134 /* Atomically increases the semaphore's count (not blocking) */ | |
| 135 int SDL_SemPost(SDL_sem *sem) | |
| 136 { | |
| 137 if ( ! sem ) { | |
| 138 SDL_SetError("Passed a NULL semaphore"); | |
| 139 return -1; | |
| 140 } | |
| 141 | |
| 142 if ( release_sem(sem->id) != B_NO_ERROR ) { | |
| 143 SDL_SetError("release_sem() failed"); | |
| 144 return -1; | |
| 145 } | |
| 146 return 0; | |
| 147 } |