Mercurial > sdl-ios-xcode
annotate src/thread/riscos/SDL_syscond.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> |
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date | Mon, 28 Nov 2005 13:58:26 +0000 |
parents | d74fbf56f2f6 |
children | c9b51268668f |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2004 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 /* RISC OS implementations uses pthreads based on linux code */ |
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24 |
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25 #ifdef SAVE_RCSID |
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26 static char rcsid = |
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27 "@(#) $Id$"; |
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28 #endif |
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29 |
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30 #ifdef DISABLE_THREADS |
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31 #include "../generic/SDL_syscond.c" |
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32 #else |
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33 #include <sys/time.h> |
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34 #include <unistd.h> |
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35 #include <errno.h> |
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36 #include <stdlib.h> |
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37 #include <pthread.h> |
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38 |
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39 #include "SDL_error.h" |
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40 #include "SDL_thread.h" |
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41 #include "SDL_sysmutex_c.h" |
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42 |
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43 struct SDL_cond |
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44 { |
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45 pthread_cond_t cond; |
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46 }; |
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47 |
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48 /* Create a condition variable */ |
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49 SDL_cond * SDL_CreateCond(void) |
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50 { |
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51 SDL_cond *cond; |
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52 |
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53 cond = (SDL_cond *) malloc(sizeof(SDL_cond)); |
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54 if ( cond ) { |
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55 if ( pthread_cond_init(&cond->cond, NULL) < 0 ) { |
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56 SDL_SetError("pthread_cond_init() failed"); |
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57 free(cond); |
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58 cond = NULL; |
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59 } |
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60 } |
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61 return(cond); |
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62 } |
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63 |
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64 /* Destroy a condition variable */ |
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65 void SDL_DestroyCond(SDL_cond *cond) |
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66 { |
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67 if ( cond ) { |
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68 pthread_cond_destroy(&cond->cond); |
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69 free(cond); |
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70 } |
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71 } |
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72 |
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73 /* Restart one of the threads that are waiting on the condition variable */ |
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74 int SDL_CondSignal(SDL_cond *cond) |
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75 { |
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76 int retval; |
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77 |
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78 if ( ! cond ) { |
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79 SDL_SetError("Passed a NULL condition variable"); |
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80 return -1; |
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81 } |
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82 |
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83 retval = 0; |
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84 if ( pthread_cond_signal(&cond->cond) != 0 ) { |
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85 SDL_SetError("pthread_cond_signal() failed"); |
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86 retval = -1; |
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87 } |
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88 return retval; |
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89 } |
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90 |
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91 /* Restart all threads that are waiting on the condition variable */ |
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92 int SDL_CondBroadcast(SDL_cond *cond) |
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93 { |
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94 int retval; |
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95 |
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96 if ( ! cond ) { |
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97 SDL_SetError("Passed a NULL condition variable"); |
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98 return -1; |
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99 } |
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100 |
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101 retval = 0; |
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102 if ( pthread_cond_broadcast(&cond->cond) != 0 ) { |
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103 SDL_SetError("pthread_cond_broadcast() failed"); |
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104 retval = -1; |
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105 } |
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106 return retval; |
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107 } |
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108 |
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109 int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) |
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110 { |
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111 int retval; |
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112 struct timeval delta; |
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113 struct timespec abstime; |
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114 |
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115 if ( ! cond ) { |
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116 SDL_SetError("Passed a NULL condition variable"); |
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117 return -1; |
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118 } |
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119 |
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120 gettimeofday(&delta, NULL); |
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121 |
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122 abstime.tv_sec = delta.tv_sec + (ms/1000); |
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123 abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000; |
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124 if ( abstime.tv_nsec > 1000000000 ) { |
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125 abstime.tv_sec += 1; |
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126 abstime.tv_nsec -= 1000000000; |
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127 } |
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128 |
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129 tryagain: |
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130 retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime); |
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131 switch (retval) { |
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132 case EINTR: |
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133 goto tryagain; |
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134 break; |
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135 case ETIMEDOUT: |
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136 retval = SDL_MUTEX_TIMEDOUT; |
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137 break; |
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138 case 0: |
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139 break; |
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140 default: |
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141 SDL_SetError("pthread_cond_timedwait() failed"); |
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142 retval = -1; |
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143 break; |
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144 } |
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145 return retval; |
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146 } |
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147 |
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148 /* Wait on the condition variable, unlocking the provided mutex. |
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149 The mutex must be locked before entering this function! |
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150 */ |
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151 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) |
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152 { |
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153 int retval; |
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154 |
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155 if ( ! cond ) { |
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156 SDL_SetError("Passed a NULL condition variable"); |
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157 return -1; |
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158 } |
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159 |
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160 retval = 0; |
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161 if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) { |
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162 SDL_SetError("pthread_cond_wait() failed"); |
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163 retval = -1; |
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164 } |
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165 return retval; |
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166 } |
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167 #endif |