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annotate src/video/x11/SDL_x11dyn.c @ 2896:1ef2f1e75ff7

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Date: Sat, 20 Dec 2008 23:25:19 +0100 From: Couriersud Subject: 32 & 16 bit versions of blendrect and blendline attached are 32, 16 and 15 bit versions of the blendrect and blendline functionality. There was an issue with the bresenham alg. in drawline which I also fixed.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 23:19:20 +0000
parents 99210400e8b9
children 54fac87e1f34
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
1950
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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 #ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT
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56 #define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT NULL
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57 #endif
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58
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59 static x11dynlib x11libs[] = {
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60 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC},
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61 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT},
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62 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER},
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63 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR},
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64 {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT},
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65 };
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66
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67 static void
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68 X11_GetSym(const char *fnname, int *rc, void **fn)
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69 {
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70 int i;
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71 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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72 if (x11libs[i].lib != NULL) {
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73 *fn = SDL_LoadFunction(x11libs[i].lib, fnname);
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74 if (*fn != NULL)
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75 break;
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76 }
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77 }
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78
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79 #if DEBUG_DYNAMIC_X11
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80 if (*fn != NULL)
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81 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname,
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82 *fn);
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83 else
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84 printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
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85 #endif
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86
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87 if (*fn == NULL)
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88 *rc = 0; /* kill this module. */
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89 }
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90
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91
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92 /* Define all the function pointers and wrappers... */
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93 #define SDL_X11_MODULE(modname)
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94 #define SDL_X11_SYM(rc,fn,params,args,ret) \
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95 static rc (*p##fn) params = NULL; \
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96 rc fn params { ret p##fn args ; }
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97 #include "SDL_x11sym.h"
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98 #undef SDL_X11_MODULE
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99 #undef SDL_X11_SYM
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100 #endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */
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101
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102 /* Annoying varargs entry point... */
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103 #ifdef X_HAVE_UTF8_STRING
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104 XIC(*pXCreateIC) (XIM,...) = NULL;
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105 char *(*pXGetICValues) (XIC, ...) = NULL;
1950
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106 #endif
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107
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108 /* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
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109 #define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1;
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110 #define SDL_X11_SYM(rc,fn,params,args,ret)
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111 #include "SDL_x11sym.h"
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112 #undef SDL_X11_MODULE
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113 #undef SDL_X11_SYM
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114
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115
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116 static int x11_load_refcount = 0;
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117
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118 void
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119 SDL_X11_UnloadSymbols(void)
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120 {
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121 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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122 /* Don't actually unload if more than one module is using the libs... */
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123 if (x11_load_refcount > 0) {
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124 if (--x11_load_refcount == 0) {
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125 int i;
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126
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127 /* set all the function pointers to NULL. */
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128 #define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1;
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129 #define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL;
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130 #include "SDL_x11sym.h"
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131 #undef SDL_X11_MODULE
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132 #undef SDL_X11_SYM
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133
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134 #ifdef X_HAVE_UTF8_STRING
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135 pXCreateIC = NULL;
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136 pXGetICValues = NULL;
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137 #endif
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138
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139 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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140 if (x11libs[i].lib != NULL) {
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141 SDL_UnloadObject(x11libs[i].lib);
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142 x11libs[i].lib = NULL;
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143 }
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144 }
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145 }
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146 }
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147 #endif
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148 }
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149
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150 /* returns non-zero if all needed symbols were loaded. */
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151 int
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152 SDL_X11_LoadSymbols(void)
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153 {
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154 int rc = 1; /* always succeed if not using Dynamic X11 stuff. */
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155
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156 #ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
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157 /* deal with multiple modules (dga, x11, etc) needing these symbols... */
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158 if (x11_load_refcount++ == 0) {
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159 int i;
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160 int *thismod = NULL;
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161 for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
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162 if (x11libs[i].libname != NULL) {
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163 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
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164 }
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165 }
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166 #define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
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167 #define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn);
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168 #include "SDL_x11sym.h"
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169 #undef SDL_X11_MODULE
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170 #undef SDL_X11_SYM
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171
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172 #ifdef X_HAVE_UTF8_STRING
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173 X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8, (void **) &pXCreateIC);
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174 X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8,
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175 (void **) &pXGetICValues);
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176 #endif
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177
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178 if (SDL_X11_HAVE_BASEXLIB) {
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179 /* all required symbols loaded. */
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180 SDL_ClearError();
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181 } else {
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182 /* in case something got loaded... */
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183 SDL_X11_UnloadSymbols();
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184 rc = 0;
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185 }
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186 }
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187 #else
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188 #ifdef X_HAVE_UTF8_STRING
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189 pXCreateIC = XCreateIC;
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190 pXGetICValues = XGetICValues;
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191 #endif
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192 #endif
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193
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194 return rc;
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195 }
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196
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197 /* vi: set ts=4 sw=4 expandtab: */