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annotate src/SDL_loadso.c @ 641:df178851293b

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Date: 28 Jun 2003 22:42:52 +0100 From: Alan Swanson Subject: Re: [SDL] New XFree 4.3 Video Mode Patch I have a wee amendment that moves the qsort in set_best_resolution to only occur after failing to find an exact match only. This would make absolutely sure we get a user set mode. While I've never had any problems for my normal resolutions (1280x1024, 1024x768, 800x600 & 640,480) while closely examining the output from qsort I've noticed it doesn't seem to sort the modes fully. These is one definite wrong at 1152x768 and a few that just look wrong to me. From a program (attached) I made to examine this more easily. X has sorted its mode list using the same method as ours (plus frequency), and our user modes get inserted without any other movement. On the patch I've made I've also changed cmpmodes to sort on vertical resolution and then horizontal. Ie vertical is now most significant bit.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 28 Jun 2003 21:52:26 +0000
parents 745873ea091f
children 35ff0890ac4e
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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f6ffac90895c Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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29 /* System dependent library loading routines */
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30
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31 #include <stdio.h>
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32 #if defined(USE_DLOPEN)
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33 # include <dlfcn.h>
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34 #elif defined(WIN32)
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35 # include <windows.h>
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36 #elif defined(__BEOS__)
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37 # include <be/kernel/image.h>
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38 #elif defined(macintosh)
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39 # include <string.h>
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40 # include <Strings.h>
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41 # include <CodeFragments.h>
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42 # include <Errors.h>
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43 #else
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44 /*#error Unsupported dynamic link environment*/
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45 #endif /* system type */
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46
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47 #include "SDL_types.h"
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48 #include "SDL_error.h"
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49 #include "SDL_loadso.h"
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50
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51 void *SDL_LoadObject(const char *sofile)
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52 {
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53 void *handle = NULL;
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54 const char *loaderror = "SDL_LoadObject() not implemented";
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55 #if defined(USE_DLOPEN)
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56 /* * */
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57 handle = dlopen(sofile, RTLD_NOW);
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58 loaderror = (char *)dlerror();
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59 #elif defined(WIN32)
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60 /* * */
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61 char errbuf[512];
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62
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63 handle = (void *)LoadLibrary(sofile);
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64
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65 /* Generate an error message if all loads failed */
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66 if ( handle == NULL ) {
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67 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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68 FORMAT_MESSAGE_FROM_SYSTEM),
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69 NULL, GetLastError(),
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70 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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71 errbuf, SDL_TABLESIZE(errbuf), NULL);
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72 loaderror = errbuf;
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73 }
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74 #elif defined(__BEOS__)
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75 /* * */
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76 image_id library_id;
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77
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78 library_id = load_add_on(sofile);
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79 if ( library_id == B_ERROR ) {
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80 loaderror = "BeOS error";
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81 } else {
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82 handle = (void *)(library_id);
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83 }
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84 #elif defined(macintosh)
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85 /* * */
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86 CFragConnectionID library_id;
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87 Ptr mainAddr;
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88 Str255 errName;
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89 OSErr error;
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90 char psofile[512];
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91
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92 strncpy(psofile, sofile, SDL_TABLESIZE(psofile));
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93 psofile[SDL_TABLESIZE(psofile)-1] = '\0';
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94 error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch,
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95 kLoadCFrag, &library_id, &mainAddr, errName);
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96 switch (error) {
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97 case noErr:
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98 break;
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99 case cfragNoLibraryErr:
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100 loaderror = "Library not found";
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101 break;
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102 case cfragUnresolvedErr:
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103 loaderror = "Unabled to resolve symbols";
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104 break;
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105 case cfragNoPrivateMemErr:
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106 case cfragNoClientMemErr:
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107 loaderror = "Out of memory";
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108 break;
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109 default:
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110 loaderror = "Unknown Code Fragment Manager error";
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111 break;
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112 }
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113 if ( loaderror == NULL ) {
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114 handle = (void *)(library_id);
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115 }
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116 #endif /* system type */
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117
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118 if ( handle == NULL ) {
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119 SDL_SetError("Failed loading %s: %s", sofile, loaderror);
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120 }
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121 return(handle);
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122 }
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123
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124 void *SDL_LoadFunction(void *handle, const char *name)
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125 {
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126 void *symbol = NULL;
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127 const char *loaderror = "SDL_LoadFunction not implemented";
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128 #if defined(USE_DLOPEN)
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129 /* * */
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130 symbol = dlsym(handle, name);
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131 if ( symbol == NULL ) {
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132 loaderror = (char *)dlerror();
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133 }
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134 #elif defined(WIN32)
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135 /* * */
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136 char errbuf[512];
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137
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138 symbol = (void *)GetProcAddress((HMODULE)handle, name);
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139 if ( symbol == NULL ) {
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140 FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS |
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141 FORMAT_MESSAGE_FROM_SYSTEM),
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142 NULL, GetLastError(),
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143 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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144 errbuf, SDL_TABLESIZE(errbuf), NULL);
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145 loaderror = errbuf;
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146 }
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147 #elif defined(__BEOS__)
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148 /* * */
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149 image_id library_id = (image_id)handle;
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150 if ( get_image_symbol(library_id,
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151 name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) {
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152 loaderror = "Symbol not found";
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153 }
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154 #elif defined(macintosh)
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155 /* * */
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156 CFragSymbolClass class;
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157 CFragConnectionID library_id = (CFragConnectionID)handle;
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158 char pname[512];
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159
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160 strncpy(pname, name, SDL_TABLESIZE(pname));
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161 pname[SDL_TABLESIZE(pname)-1] = '\0';
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162 if ( FindSymbol(library_id, C2PStr(pname),
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163 (char **)&symbol, &class) != noErr ) {
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164 loaderror = "Symbol not found";
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165 }
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166 #endif /* system type */
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167
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168 if ( symbol == NULL ) {
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169 SDL_SetError("Failed loading %s: %s", name, loaderror);
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170 }
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171 return(symbol);
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172 }
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173
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174 void SDL_UnloadObject(void *handle)
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175 {
336
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176 #if defined(__BEOS__)
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177 image_id library_id;
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178 #endif
294
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179 if ( handle == NULL ) {
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180 return;
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181 }
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182 #if defined(USE_DLOPEN)
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183 /* * */
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184 dlclose(handle);
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185 #elif defined(WIN32)
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186 /* * */
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187 FreeLibrary((HMODULE)handle);
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188 #elif defined(__BEOS__)
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189 /* * */
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190 library_id = (image_id)handle;
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191 unload_add_on(library_id);
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192 #elif defined(macintosh)
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193 /* * */
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194 CFragConnectionID library_id = (CFragConnectionID)handle;
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195 CloseConnection(library_id);
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196 #endif /* system type */
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197 }