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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 #include "SDL_config.h" |
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23 |
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24 #define DEBUG_DYNAMIC_X11 0 |
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25 |
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26 #include "SDL_x11dyn.h" |
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27 |
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28 #if DEBUG_DYNAMIC_X11 |
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29 #include <stdio.h> |
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30 #endif |
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31 |
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32 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC |
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33 |
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34 #include "SDL_name.h" |
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35 #include "SDL_loadso.h" |
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36 |
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37 typedef struct |
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38 { |
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39 void *lib; |
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40 const char *libname; |
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41 } x11dynlib; |
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42 |
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43 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC |
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44 #define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL |
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45 #endif |
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46 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT |
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47 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL |
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48 #endif |
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49 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER |
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50 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER NULL |
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51 #endif |
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52 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR |
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53 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL |
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54 #endif |
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55 |
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56 static x11dynlib x11libs[] = |
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57 { |
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58 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC }, |
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59 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT }, |
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60 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER }, |
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61 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR }, |
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62 }; |
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63 |
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64 static void X11_GetSym(const char *fnname, int *rc, void **fn) |
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65 { |
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66 int i; |
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67 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { |
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68 if (x11libs[i].lib != NULL) |
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69 { |
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70 *fn = SDL_LoadFunction(x11libs[i].lib, fnname); |
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71 if (*fn != NULL) |
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72 break; |
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73 } |
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74 } |
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75 |
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76 #if DEBUG_DYNAMIC_X11 |
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77 if (*fn != NULL) |
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78 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, *fn); |
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79 else |
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80 printf("X11: Symbol '%s' NOT FOUND!\n", fnname); |
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81 #endif |
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82 |
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83 if (*fn == NULL) |
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84 *rc = 0; /* kill this module. */ |
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85 } |
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86 |
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87 |
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88 /* Define all the function pointers and wrappers... */ |
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89 #define SDL_X11_MODULE(modname) |
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90 #define SDL_X11_SYM(rc,fn,params,args,ret) \ |
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91 static rc (*p##fn) params = NULL; \ |
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92 rc fn params { ret p##fn args ; } |
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93 #include "SDL_x11sym.h" |
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94 #undef SDL_X11_MODULE |
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95 #undef SDL_X11_SYM |
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96 #endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */ |
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97 |
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98 /* Annoying varargs entry point... */ |
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99 #ifdef X_HAVE_UTF8_STRING |
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100 XIC (*pXCreateIC)(XIM,...) = NULL; |
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101 char *(*pXGetICValues)(XIC, ...) = NULL; |
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102 #endif |
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103 |
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104 /* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */ |
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105 #define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1; |
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106 #define SDL_X11_SYM(rc,fn,params,args,ret) |
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107 #include "SDL_x11sym.h" |
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108 #undef SDL_X11_MODULE |
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109 #undef SDL_X11_SYM |
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110 |
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111 |
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112 static int x11_load_refcount = 0; |
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113 |
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114 void SDL_X11_UnloadSymbols(void) |
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115 { |
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116 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC |
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117 /* Don't actually unload if more than one module is using the libs... */ |
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118 if (x11_load_refcount > 0) { |
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119 if (--x11_load_refcount == 0) { |
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120 int i; |
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121 |
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122 /* set all the function pointers to NULL. */ |
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123 #define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; |
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124 #define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL; |
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125 #include "SDL_x11sym.h" |
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126 #undef SDL_X11_MODULE |
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127 #undef SDL_X11_SYM |
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128 |
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129 #ifdef X_HAVE_UTF8_STRING |
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130 pXCreateIC = NULL; |
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131 pXGetICValues = NULL; |
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132 #endif |
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133 |
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134 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { |
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135 if (x11libs[i].lib != NULL) { |
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136 SDL_UnloadObject(x11libs[i].lib); |
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137 x11libs[i].lib = NULL; |
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138 } |
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139 } |
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140 } |
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141 } |
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142 #endif |
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143 } |
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144 |
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145 /* returns non-zero if all needed symbols were loaded. */ |
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146 int SDL_X11_LoadSymbols(void) |
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147 { |
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148 int rc = 1; /* always succeed if not using Dynamic X11 stuff. */ |
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149 |
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150 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC |
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151 /* deal with multiple modules (dga, x11, etc) needing these symbols... */ |
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152 if (x11_load_refcount++ == 0) { |
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153 int i; |
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154 int *thismod = NULL; |
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155 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) { |
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156 if (x11libs[i].libname != NULL) { |
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157 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname); |
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158 } |
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159 } |
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160 #define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname; |
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161 #define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn); |
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162 #include "SDL_x11sym.h" |
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163 #undef SDL_X11_MODULE |
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164 #undef SDL_X11_SYM |
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165 |
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166 #ifdef X_HAVE_UTF8_STRING |
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167 X11_GetSym("XCreateIC",&SDL_X11_HAVE_UTF8,(void **)&pXCreateIC); |
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168 X11_GetSym("XGetICValues",&SDL_X11_HAVE_UTF8,(void **)&pXGetICValues); |
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169 #endif |
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170 |
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171 if (SDL_X11_HAVE_BASEXLIB) { /* all required symbols loaded. */ |
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172 SDL_ClearError(); |
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173 } else { |
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174 SDL_X11_UnloadSymbols(); /* in case something got loaded... */ |
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175 rc = 0; |
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176 } |
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177 } |
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178 #else |
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179 #if DEBUG_DYNAMIC_X11 |
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180 printf("X11: No dynamic X11 support in this build of SDL.\n"); |
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181 #endif |
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182 #ifdef X_HAVE_UTF8_STRING |
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183 pXCreateIC = XCreateIC; |
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184 pXGetICValues = XGetICValues; |
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185 #endif |
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186 #endif |
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187 |
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188 return rc; |
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189 } |
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190 |
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191 /* end of SDL_x11dyn.c ... */ |
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192 |