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annotate docs/html/sdlglsetattribute.html @ 4928:930614179450 SDL-1.2

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Patch from Haiku's Google Code-In student Daniel Marth, fixes an off-by-one issue in bwindow.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 03 Dec 2010 16:55:25 -0800
parents 355632dca928
children
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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >SDL_GL_SetAttribute</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="Video"
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14 HREF="video.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="SDL_GL_GetAttribute"
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17 HREF="sdlglgetattribute.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_GL_SwapBuffers"
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20 HREF="sdlglswapbuffers.html"></HEAD
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21 ><BODY
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22 CLASS="REFENTRY"
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23 BGCOLOR="#FFF8DC"
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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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45 ALIGN="left"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="sdlglgetattribute.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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54 ALIGN="center"
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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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59 ALIGN="right"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="sdlglswapbuffers.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="SDLGLSETATTRIBUTE"
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74 ></A
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75 >SDL_GL_SetAttribute</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="AEN2742"
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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_GL_SetAttribute&nbsp;--&nbsp;Set a special SDL/OpenGL attribute</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="AEN2745"
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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="AEN2746"
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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 >int <B
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106 CLASS="FSFUNC"
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107 >SDL_GL_SetAttribute</B
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108 ></CODE
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109 >(SDL_GLattr attr, int value);</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="AEN2752"
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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 >Sets the OpenGL <A
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124 HREF="sdlglattr.html"
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125 >attribute</A
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126 > <TT
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127 CLASS="PARAMETER"
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128 ><I
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129 >attr</I
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130 ></TT
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131 > to <TT
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132 CLASS="PARAMETER"
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133 ><I
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134 >value</I
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135 ></TT
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136 >. The attributes you set don't take effect until after a call to <A
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137 HREF="sdlsetvideomode.html"
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138 ><TT
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139 CLASS="FUNCTION"
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140 >SDL_SetVideoMode</TT
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141 ></A
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142 >. You should use <A
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143 HREF="sdlglgetattribute.html"
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144 ><TT
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145 CLASS="FUNCTION"
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146 >SDL_GL_GetAttribute</TT
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147 ></A
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148 > to check the values after a <TT
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149 CLASS="FUNCTION"
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150 >SDL_SetVideoMode</TT
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151 > call.</P
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152 ></DIV
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153 ><DIV
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154 CLASS="REFSECT1"
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155 ><A
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156 NAME="AEN2763"
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157 ></A
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158 ><H2
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159 >Return Value</H2
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160 ><P
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161 >Returns <SPAN
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162 CLASS="RETURNVALUE"
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163 >0</SPAN
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164 > on success, or <SPAN
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165 CLASS="RETURNVALUE"
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166 >-1</SPAN
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167 > on error.</P
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168 ></DIV
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169 ><DIV
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170 CLASS="REFSECT1"
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171 ><A
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172 NAME="AEN2768"
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173 ></A
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174 ><H2
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175 >Example</H2
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176 ><PRE
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177 CLASS="PROGRAMLISTING"
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178 >SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
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179 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
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180 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
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181 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
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182 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
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183 if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) {
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184 fprintf(stderr, "Couldn't set GL mode: %s\n", SDL_GetError());
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185 SDL_Quit();
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186 return;
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187 }</PRE
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188 ><DIV
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189 CLASS="NOTE"
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190 ><BLOCKQUOTE
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191 CLASS="NOTE"
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192 ><P
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193 ><B
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194 >Note: </B
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195 >The <TT
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196 CLASS="LITERAL"
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197 >SDL_DOUBLEBUF</TT
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198 > flag is not required to enable double buffering when setting an OpenGL video mode. Double buffering is enabled or disabled using the SDL_GL_DOUBLEBUFFER attribute.</P
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199 ></BLOCKQUOTE
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200 ></DIV
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201 ></DIV
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202 ><DIV
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203 CLASS="REFSECT1"
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204 ><A
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205 NAME="AEN2774"
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206 ></A
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207 ><H2
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208 >See Also</H2
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209 ><P
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210 ><A
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211 HREF="sdlglgetattribute.html"
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212 ><TT
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213 CLASS="FUNCTION"
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214 >SDL_GL_GetAttribute</TT
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215 ></A
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216 >,
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217 <A
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218 HREF="sdlglattr.html"
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219 >GL Attributes</A
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220 ></P
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221 ></DIV
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222 ><DIV
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223 CLASS="NAVFOOTER"
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224 ><HR
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225 ALIGN="LEFT"
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226 WIDTH="100%"><TABLE
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227 SUMMARY="Footer navigation table"
0
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228 WIDTH="100%"
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229 BORDER="0"
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230 CELLPADDING="0"
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231 CELLSPACING="0"
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232 ><TR
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233 ><TD
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234 WIDTH="33%"
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235 ALIGN="left"
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236 VALIGN="top"
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237 ><A
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238 HREF="sdlglgetattribute.html"
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239 ACCESSKEY="P"
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240 >Prev</A
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241 ></TD
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242 ><TD
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243 WIDTH="34%"
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244 ALIGN="center"
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245 VALIGN="top"
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246 ><A
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247 HREF="index.html"
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248 ACCESSKEY="H"
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249 >Home</A
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250 ></TD
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251 ><TD
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252 WIDTH="33%"
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253 ALIGN="right"
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254 VALIGN="top"
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255 ><A
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256 HREF="sdlglswapbuffers.html"
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257 ACCESSKEY="N"
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258 >Next</A
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259 ></TD
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260 ></TR
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261 ><TR
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262 ><TD
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263 WIDTH="33%"
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264 ALIGN="left"
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265 VALIGN="top"
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266 >SDL_GL_GetAttribute</TD
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267 ><TD
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268 WIDTH="34%"
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269 ALIGN="center"
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270 VALIGN="top"
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271 ><A
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272 HREF="video.html"
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273 ACCESSKEY="U"
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274 >Up</A
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275 ></TD
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276 ><TD
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277 WIDTH="33%"
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278 ALIGN="right"
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279 VALIGN="top"
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280 >SDL_GL_SwapBuffers</TD
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281 ></TR
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282 ></TABLE
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283 ></DIV
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284 ></BODY
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285 ></HTML
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286 >