annotate docs/html/sdlwasinit.html @ 2328:91e601d9df8b

re: bug#563. checking in some commented out trace code and a fix so that the in testalpha.c the background only flashes when alpha == 255. The problem that is being fixed is caused by clearing SDL_COPY_RLE_COLORKEY without setting SDL_COPY_RLE_DESIRED in SDL_UnRELSurface.
author Bob Pendleton <bob@pendleton.com>
date Fri, 14 Mar 2008 18:17:49 +0000
parents 355632dca928
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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >SDL_WasInit</TITLE
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5 ><META
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6 NAME="GENERATOR"
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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8 "><LINK
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9 REL="HOME"
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10 TITLE="SDL Library Documentation"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="General"
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17 HREF="sdlquit.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_GetError"
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20 HREF="sdlgeterror.html"></HEAD
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24 TEXT="#000000"
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25 LINK="#0000ee"
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26 VLINK="#551a8b"
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27 ALINK="#ff0000"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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36 ><TR
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37 ><TH
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >SDL Library Documentation</TH
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41 ></TR
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="sdlquit.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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55 VALIGN="bottom"
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56 ></TD
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57 ><TD
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58 WIDTH="10%"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="sdlgeterror.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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71 ><H1
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72 ><A
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73 NAME="SDLWASINIT"
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74 ></A
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75 >SDL_WasInit</H1
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76 ><DIV
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77 CLASS="REFNAMEDIV"
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78 ><A
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79 NAME="AEN617"
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80 ></A
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81 ><H2
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82 >Name</H2
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83 >SDL_WasInit&nbsp;--&nbsp;Check which subsystems are initialized</DIV
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84 ><DIV
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85 CLASS="REFSYNOPSISDIV"
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86 ><A
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87 NAME="AEN620"
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88 ></A
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89 ><H2
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90 >Synopsis</H2
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91 ><DIV
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92 CLASS="FUNCSYNOPSIS"
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93 ><A
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94 NAME="AEN621"
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95 ></A
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96 ><P
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97 ></P
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98 ><PRE
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99 CLASS="FUNCSYNOPSISINFO"
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100 >#include "SDL.h"</PRE
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101 ><P
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102 ><CODE
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103 ><CODE
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104 CLASS="FUNCDEF"
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105 >Uint32 <B
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106 CLASS="FSFUNC"
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107 >SDL_WasInit</B
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108 ></CODE
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109 >(Uint32 flags);</CODE
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110 ></P
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111 ><P
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112 ></P
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113 ></DIV
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114 ></DIV
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115 ><DIV
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116 CLASS="REFSECT1"
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117 ><A
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118 NAME="AEN627"
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119 ></A
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120 ><H2
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121 >Description</H2
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122 ><P
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123 ><TT
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124 CLASS="FUNCTION"
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125 >SDL_WasInit</TT
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126 > allows you to see which SDL subsytems have been <A
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127 HREF="sdlinit.html"
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128 >initialized</A
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129 >. <TT
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130 CLASS="PARAMETER"
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131 ><I
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132 >flags</I
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133 ></TT
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134 > is a bitwise OR'd combination of the subsystems you wish to check (see <A
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135 HREF="sdlinit.html"
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136 ><TT
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137 CLASS="FUNCTION"
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138 >SDL_Init</TT
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139 ></A
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140 > for a list of subsystem flags).</P
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141 ></DIV
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142 ><DIV
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143 CLASS="REFSECT1"
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144 ><A
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145 NAME="AEN635"
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146 ></A
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147 ><H2
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148 >Return Value</H2
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149 ><P
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150 ><TT
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151 CLASS="FUNCTION"
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152 >SDL_WasInit</TT
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153 > returns a bitwised OR'd combination of the initialized subsystems.</P
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154 ></DIV
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155 ><DIV
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156 CLASS="REFSECT1"
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157 ><A
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158 NAME="AEN639"
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159 ></A
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160 ><H2
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161 >Examples</H2
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162 ><PRE
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163 CLASS="PROGRAMLISTING"
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164 >&#13;/* Here are several ways you can use SDL_WasInit() */
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165
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166 /* Get init data on all the subsystems */
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167 Uint32 subsystem_init;
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168
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169 subsystem_init=SDL_WasInit(SDL_INIT_EVERYTHING);
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170
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171 if(subsystem_init&#38;SDL_INIT_VIDEO)
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172 printf("Video is initialized.\n");
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173 else
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174 printf("Video is not initialized.\n");
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175
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176
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177
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178 /* Just check for one specfic subsystem */
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179
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180 if(SDL_WasInit(SDL_INIT_VIDEO)!=0)
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181 printf("Video is initialized.\n");
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182 else
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183 printf("Video is not initialized.\n");
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184
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185
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186
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187
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188 /* Check for two subsystems */
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189
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190 Uint32 subsystem_mask=SDL_INIT_VIDEO|SDL_INIT_AUDIO;
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191
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192 if(SDL_WasInit(subsystem_mask)==subsystem_mask)
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193 printf("Video and Audio initialized.\n");
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194 else
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195 printf("Video and Audio not initialized.\n");&#13;</PRE
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196 ></DIV
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197 ><DIV
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198 CLASS="REFSECT1"
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199 ><A
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200 NAME="AEN642"
0
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201 ></A
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202 ><H2
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203 >See Also</H2
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204 ><P
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205 ><A
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206 HREF="sdlinit.html"
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207 ><TT
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208 CLASS="FUNCTION"
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209 >SDL_Init</TT
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210 ></A
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211 >,
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212 <A
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213 HREF="sdlinitsubsystem.html"
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214 ><TT
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215 CLASS="FUNCTION"
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216 >SDL_Subsystem</TT
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217 ></A
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218 ></P
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219 ></DIV
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220 ><DIV
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221 CLASS="NAVFOOTER"
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222 ><HR
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223 ALIGN="LEFT"
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224 WIDTH="100%"><TABLE
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225 SUMMARY="Footer navigation table"
0
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226 WIDTH="100%"
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227 BORDER="0"
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228 CELLPADDING="0"
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229 CELLSPACING="0"
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230 ><TR
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231 ><TD
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232 WIDTH="33%"
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233 ALIGN="left"
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234 VALIGN="top"
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235 ><A
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236 HREF="sdlquit.html"
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237 ACCESSKEY="P"
0
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238 >Prev</A
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239 ></TD
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240 ><TD
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241 WIDTH="34%"
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242 ALIGN="center"
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243 VALIGN="top"
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244 ><A
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245 HREF="index.html"
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246 ACCESSKEY="H"
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247 >Home</A
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248 ></TD
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249 ><TD
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250 WIDTH="33%"
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251 ALIGN="right"
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252 VALIGN="top"
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253 ><A
181
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254 HREF="sdlgeterror.html"
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255 ACCESSKEY="N"
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256 >Next</A
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257 ></TD
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258 ></TR
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259 ><TR
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260 ><TD
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261 WIDTH="33%"
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262 ALIGN="left"
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263 VALIGN="top"
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264 >SDL_Quit</TD
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265 ><TD
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266 WIDTH="34%"
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267 ALIGN="center"
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268 VALIGN="top"
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269 ><A
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270 HREF="general.html"
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271 ACCESSKEY="U"
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272 >Up</A
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273 ></TD
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274 ><TD
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275 WIDTH="33%"
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276 ALIGN="right"
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277 VALIGN="top"
181
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278 >SDL_GetError</TD
0
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279 ></TR
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280 ></TABLE
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281 ></DIV
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282 ></BODY
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283 ></HTML
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284 >