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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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@devolution.com
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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 /* Initialization code for SDL */
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29
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30 #include <stdlib.h> /* For getenv() */
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31
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32 #include "SDL.h"
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33 #include "SDL_endian.h"
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34 #include "SDL_fatal.h"
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35 #ifndef DISABLE_VIDEO
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36 #include "SDL_leaks.h"
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37 #endif
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38
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39 /* Initialization/Cleanup routines */
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40 #ifndef DISABLE_JOYSTICK
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41 extern int SDL_JoystickInit(void);
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42 extern void SDL_JoystickQuit(void);
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43 #endif
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44 #ifndef DISABLE_CDROM
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45 extern int SDL_CDROMInit(void);
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46 extern void SDL_CDROMQuit(void);
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47 #endif
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48 #ifndef DISABLE_TIMERS
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49 extern void SDL_StartTicks(void);
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50 extern int SDL_TimerInit(void);
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51 extern void SDL_TimerQuit(void);
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52 #endif
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53
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54 /* The current SDL version */
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55 static SDL_version version =
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56 { SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL };
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57
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58 /* The initialized subsystems */
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59 static Uint32 SDL_initialized = 0;
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60 static Uint32 ticks_started = 0;
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61
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62 #ifdef CHECK_LEAKS
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63 int surfaces_allocated = 0;
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64 #endif
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65
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66 int SDL_InitSubSystem(Uint32 flags)
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67 {
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68 #ifndef DISABLE_VIDEO
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69 /* Initialize the video/event subsystem */
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70 if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) {
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71 if ( SDL_VideoInit(getenv("SDL_VIDEODRIVER"),
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72 (flags&SDL_INIT_EVENTTHREAD)) < 0 ) {
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73 return(-1);
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74 }
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75 SDL_initialized |= SDL_INIT_VIDEO;
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76 }
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77 #else
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78 if ( flags & SDL_INIT_VIDEO ) {
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79 SDL_SetError("SDL not built with video support");
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80 return(-1);
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81 }
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82 #endif
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83
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84 #ifndef DISABLE_AUDIO
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85 /* Initialize the audio subsystem */
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86 if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) {
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87 if ( SDL_AudioInit(getenv("SDL_AUDIODRIVER")) < 0 ) {
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88 return(-1);
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89 }
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90 SDL_initialized |= SDL_INIT_AUDIO;
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91 }
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92 #else
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93 if ( flags & SDL_INIT_AUDIO ) {
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94 SDL_SetError("SDL not built with audio support");
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95 return(-1);
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96 }
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97 #endif
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98
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99 #ifndef DISABLE_TIMERS
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100 /* Initialize the timer subsystem */
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101 if ( ! ticks_started ) {
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102 SDL_StartTicks();
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103 ticks_started = 1;
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104 }
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105 if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) {
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106 if ( SDL_TimerInit() < 0 ) {
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107 return(-1);
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108 }
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109 SDL_initialized |= SDL_INIT_TIMER;
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110 }
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111 #else
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112 if ( flags & SDL_INIT_TIMER ) {
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113 SDL_SetError("SDL not built with timer support");
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114 return(-1);
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115 }
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116 #endif
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117
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118 #ifndef DISABLE_JOYSTICK
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119 /* Initialize the joystick subsystem */
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120 if ( (flags & SDL_INIT_JOYSTICK) &&
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121 !(SDL_initialized & SDL_INIT_JOYSTICK) ) {
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122 if ( SDL_JoystickInit() < 0 ) {
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123 return(-1);
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124 }
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125 SDL_initialized |= SDL_INIT_JOYSTICK;
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126 }
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127 #else
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128 if ( flags & SDL_INIT_JOYSTICK ) {
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129 SDL_SetError("SDL not built with joystick support");
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130 return(-1);
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131 }
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132 #endif
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133
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134 #ifndef DISABLE_CDROM
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135 /* Initialize the CD-ROM subsystem */
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136 if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) {
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137 if ( SDL_CDROMInit() < 0 ) {
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138 return(-1);
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139 }
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140 SDL_initialized |= SDL_INIT_CDROM;
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141 }
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142 #else
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143 if ( flags & SDL_INIT_CDROM ) {
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144 SDL_SetError("SDL not built with cdrom support");
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145 return(-1);
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146 }
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147 #endif
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148 return(0);
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149 }
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150
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151 int SDL_Init(Uint32 flags)
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152 {
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153 /* Clear the error message */
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154 SDL_ClearError();
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155
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156 /* Initialize the desired subsystems */
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157 if ( SDL_InitSubSystem(flags) < 0 ) {
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158 return(-1);
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159 }
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160
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161 /* Everything is initialized */
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162 if ( !(flags & SDL_INIT_NOPARACHUTE) ) {
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163 SDL_InstallParachute();
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164 }
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165 return(0);
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166 }
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167
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168 void SDL_QuitSubSystem(Uint32 flags)
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169 {
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170 /* Shut down requested initialized subsystems */
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171 #ifndef DISABLE_CDROM
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172 if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) {
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173 SDL_CDROMQuit();
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174 SDL_initialized &= ~SDL_INIT_CDROM;
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175 }
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176 #endif
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177 #ifndef DISABLE_JOYSTICK
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178 if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) {
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179 SDL_JoystickQuit();
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180 SDL_initialized &= ~SDL_INIT_JOYSTICK;
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181 }
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182 #endif
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183 #ifndef DISABLE_TIMERS
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184 if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) {
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185 SDL_TimerQuit();
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186 SDL_initialized &= ~SDL_INIT_TIMER;
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187 }
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188 #endif
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189 #ifndef DISABLE_AUDIO
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190 if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) {
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191 SDL_AudioQuit();
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192 SDL_initialized &= ~SDL_INIT_AUDIO;
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193 }
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194 #endif
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195 #ifndef DISABLE_VIDEO
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196 if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) {
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197 SDL_VideoQuit();
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198 SDL_initialized &= ~SDL_INIT_VIDEO;
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199 }
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200 #endif
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201 }
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202
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203 Uint32 SDL_WasInit(Uint32 flags)
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204 {
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205 if ( ! flags ) {
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206 flags = SDL_INIT_EVERYTHING;
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207 }
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208 return (SDL_initialized&flags);
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209 }
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210
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211 void SDL_Quit(void)
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212 {
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213 /* Quit all subsystems */
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214 SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
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215
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216 #ifdef CHECK_LEAKS
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217 /* Print the number of surfaces not freed */
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218 if ( surfaces_allocated != 0 ) {
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219 fprintf(stderr, "SDL Warning: %d SDL surfaces extant\n",
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220 surfaces_allocated);
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221 }
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222 #endif
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223
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224 /* Uninstall any parachute signal handlers */
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225 SDL_UninstallParachute();
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226 }
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227
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228 /* Return the library version number */
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229 const SDL_version * SDL_Linked_Version(void)
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230 {
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231 return(&version);
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232 }
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233
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