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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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36 ><TR |
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37 ><TH |
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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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48 HREF="sdlglgetattribute.html" |
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50 >Prev</A |
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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 -- 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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