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annotate src/video/x11/SDL_x11dyn.c @ 1207:c9ec00d3e8bc

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To: sdl@libsdl.org From: Christian Walther <cwalther@gmx.ch> Date: Wed, 21 Dec 2005 13:39:39 +0100 Subject: [SDL] Another mouse bug patch for Mac OS X Oh my, yet another change in the quartz mouse handling code! :) The attached patch fixes the following bug: Calling SDL_WarpMouse() while the cursor is invisible and grabbed should only update SDL's internal mouse location, not try to warp the system cursor (which is not at that location, but fixed in the middle of the window). Otherwise, the next mouse motion event is wrong. Please apply. Thanks Christian
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 21 Dec 2005 18:02:36 +0000
parents f84c6f1397cd
children d05306f0dc21
rev   line source
1168
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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 /*#define DEBUG_DYNAMIC_X11 1*/
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24
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25 #include "SDL_x11dyn.h"
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26
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27 #ifdef DEBUG_DYNAMIC_X11
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28 #include <stdio.h>
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29 #endif
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30
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31 #ifdef X11_DYNAMIC
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32 #include <dlfcn.h>
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33 #include "SDL_name.h"
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34 #include "SDL_loadso.h"
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35 static const char *x11_library = X11_DYNAMIC;
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36 static void *x11_handle = NULL;
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37 static const char *x11ext_library = X11EXT_DYNAMIC;
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38 static void *x11ext_handle = NULL;
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39
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40 static void *X11_GetSym(const char *fnname, int *rc)
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41 {
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42 void *fn = NULL;
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43 if (*rc) { /* haven't already failed on a previous lookup? */
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44 fn = SDL_LoadFunction(x11_handle, fnname);
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45 #if DEBUG_DYNAMIC_X11
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46 if (fn != NULL)
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47 printf("X11: Found '%s' in libX11 (%p)\n", fnname, fn);
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48 #endif
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49
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50 if (fn == NULL) { /* not found? Check libX11ext ... */
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51 fn = SDL_LoadFunction(x11ext_handle, fnname);
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52 #if DEBUG_DYNAMIC_X11
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53 if (fn != NULL)
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54 printf("X11: Found '%s' in libXext (%p)\n", fnname, fn);
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55 else
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56 printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
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57 #endif
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58 }
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59 *rc = (fn != NULL);
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60 }
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61
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62 return fn;
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63 }
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64 #endif /* defined X11_DYNAMIC */
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65
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66 /* Define all the function pointers... */
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67 #define SDL_X11_SYM(ret,fn,params) ret (*p##fn) params = NULL;
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68 #include "SDL_x11sym.h"
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69 #undef SDL_X11_SYM
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70
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71 static int x11_load_refcount = 0;
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72
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73 void SDL_X11_UnloadSymbols(void)
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74 {
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75 /* Don't actually unload if more than one module is using the libs... */
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76 if (x11_load_refcount > 0) {
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77 if (--x11_load_refcount == 0) {
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78 /* set all the function pointers to NULL. */
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79 #define SDL_X11_SYM(ret,fn,params) p##fn = NULL;
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80 #include "SDL_x11sym.h"
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81 #undef SDL_X11_SYM
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82
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83 #ifdef X11_DYNAMIC
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84 if (x11_handle != NULL) {
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85 SDL_UnloadObject(x11_handle);
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86 x11_handle = NULL;
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87 }
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88 if (x11ext_handle != NULL) {
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89 SDL_UnloadObject(x11ext_handle);
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90 x11ext_handle = NULL;
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91 }
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92 #endif
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93 }
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94 }
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95 }
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96
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97 /* returns non-zero if all needed symbols were loaded. */
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98 int SDL_X11_LoadSymbols(void)
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99 {
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100 int rc = 1;
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101
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102 /* deal with multiple modules (dga, x11, etc) needing these symbols... */
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103 if (x11_load_refcount++ == 0) {
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104 #ifdef X11_DYNAMIC
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105 x11_handle = SDL_LoadObject(x11_library);
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106 x11ext_handle = SDL_LoadObject(x11ext_library);
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107 rc = ((x11_handle != NULL) && (x11ext_handle != NULL));
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108 #define SDL_X11_SYM(r,fn,arg) p##fn = X11_GetSym(#fn, &rc);
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109 #include "SDL_x11sym.h"
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110 #undef SDL_X11_SYM
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111
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112 if (!rc)
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113 SDL_X11_UnloadSymbols(); /* in case one of these loaded... */
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114
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115 #else
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116 #define SDL_X11_SYM(r,fn,arg) p##fn = fn;
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117 #include "SDL_x11sym.h"
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118 #undef SDL_X11_SYM
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119 #endif
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120 }
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121
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122 return rc;
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123 }
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124
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125 /* end of SDL_x11dyn.c ... */
045f186426e1 Dynamically load X11 libraries like we currently do for alsa, esd, etc.
Ryan C. Gordon <icculus@icculus.org>
parents:
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126