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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 1.61
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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 WIDTH="100%"
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32 BORDER="0"
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33 CELLPADDING="0"
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34 CELLSPACING="0"
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35 ><TR
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36 ><TH
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37 COLSPAN="3"
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38 ALIGN="center"
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39 >SDL Library Documentation</TH
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40 ></TR
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41 ><TR
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42 ><TD
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43 WIDTH="10%"
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44 ALIGN="left"
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45 VALIGN="bottom"
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46 ><A
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47 HREF="sdlglgetattribute.html"
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48 >Prev</A
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49 ></TD
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50 ><TD
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51 WIDTH="80%"
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52 ALIGN="center"
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53 VALIGN="bottom"
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54 ></TD
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55 ><TD
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56 WIDTH="10%"
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57 ALIGN="right"
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58 VALIGN="bottom"
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59 ><A
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60 HREF="sdlglswapbuffers.html"
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61 >Next</A
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62 ></TD
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63 ></TR
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64 ></TABLE
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65 ><HR
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66 ALIGN="LEFT"
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67 WIDTH="100%"></DIV
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68 ><H1
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69 ><A
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70 NAME="SDLGLSETATTRIBUTE"
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71 >SDL_GL_SetAttribute</A
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72 ></H1
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73 ><DIV
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74 CLASS="REFNAMEDIV"
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75 ><A
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76 NAME="AEN2244"
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77 ></A
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78 ><H2
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79 >Name</H2
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80 >SDL_GL_SetAttribute -- Set a special SDL/OpenGL attribute</DIV
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81 ><DIV
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82 CLASS="REFSYNOPSISDIV"
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83 ><A
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84 NAME="AEN2247"
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85 ></A
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86 ><H2
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87 >Synopsis</H2
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88 ><DIV
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89 CLASS="FUNCSYNOPSIS"
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90 ><A
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91 NAME="AEN2248"
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92 ></A
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93 ><P
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94 ></P
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95 ><PRE
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96 CLASS="FUNCSYNOPSISINFO"
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97 >#include "SDL.h"</PRE
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98 ><P
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99 ><CODE
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100 ><CODE
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101 CLASS="FUNCDEF"
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102 >int <B
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103 CLASS="FSFUNC"
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104 >SDL_GL_SetAttribute</B
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105 ></CODE
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106 >(SDL_GLattr attr, int value);</CODE
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107 ></P
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108 ><P
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109 ></P
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110 ></DIV
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111 ></DIV
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112 ><DIV
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113 CLASS="REFSECT1"
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114 ><A
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115 NAME="AEN2254"
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116 ></A
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117 ><H2
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118 >Description</H2
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119 ><P
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120 >Sets the OpenGL <A
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121 HREF="sdlglattr.html"
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122 >attribute</A
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123 > <TT
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124 CLASS="PARAMETER"
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125 ><I
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126 >attr</I
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127 ></TT
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128 > to <TT
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129 CLASS="PARAMETER"
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130 ><I
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131 >value</I
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132 ></TT
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133 >. The attributes you set don't take effect until after a call to <A
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134 HREF="sdlsetvideomode.html"
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135 ><TT
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136 CLASS="FUNCTION"
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137 >SDL_SetVideoMode</TT
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138 ></A
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139 >. You should use <A
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140 HREF="sdlglgetattribute.html"
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141 ><TT
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142 CLASS="FUNCTION"
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143 >SDL_GL_GetAttribute</TT
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144 ></A
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145 > to check the values after a <TT
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146 CLASS="FUNCTION"
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147 >SDL_SetVideoMode</TT
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148 > call.</P
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149 ></DIV
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150 ><DIV
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151 CLASS="REFSECT1"
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152 ><A
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153 NAME="AEN2265"
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154 ></A
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155 ><H2
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156 >Return Value</H2
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157 ><P
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158 >Returns <SPAN
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159 CLASS="RETURNVALUE"
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160 >0</SPAN
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161 > on success, or <SPAN
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162 CLASS="RETURNVALUE"
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163 >-1</SPAN
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164 > on error.</P
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165 ></DIV
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166 ><DIV
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167 CLASS="REFSECT1"
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168 ><A
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169 NAME="AEN2270"
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170 ></A
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171 ><H2
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172 >Example</H2
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173 ><PRE
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174 CLASS="PROGRAMLISTING"
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175 >SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
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176 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
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177 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
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178 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
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179 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
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180 if ( (screen=SDL_SetVideoMode( 640, 480, 16, SDL_OPENGL )) == NULL ) {
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181 fprintf(stderr, "Couldn't set GL mode: %s\n", SDL_GetError());
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182 SDL_Quit();
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183 return;
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184 }</PRE
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185 ><DIV
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186 CLASS="NOTE"
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187 ><BLOCKQUOTE
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188 CLASS="NOTE"
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189 ><P
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190 ><B
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191 >Note: </B
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192 >The <TT
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193 CLASS="LITERAL"
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194 >SDL_DOUBLEBUF</TT
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195 > 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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196 ></BLOCKQUOTE
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197 ></DIV
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198 ></DIV
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199 ><DIV
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200 CLASS="REFSECT1"
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201 ><A
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202 NAME="AEN2276"
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203 ></A
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204 ><H2
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205 >See Also</H2
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206 ><P
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207 ><A
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208 HREF="sdlglgetattribute.html"
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209 ><TT
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210 CLASS="FUNCTION"
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211 >SDL_GL_GetAttribute</TT
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212 ></A
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213 >,
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214 <A
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215 HREF="sdlglattr.html"
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216 >GL Attributes</A
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217 ></P
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218 ></DIV
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219 ><DIV
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220 CLASS="NAVFOOTER"
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221 ><HR
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222 ALIGN="LEFT"
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223 WIDTH="100%"><TABLE
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224 WIDTH="100%"
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225 BORDER="0"
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226 CELLPADDING="0"
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227 CELLSPACING="0"
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228 ><TR
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229 ><TD
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230 WIDTH="33%"
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231 ALIGN="left"
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232 VALIGN="top"
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233 ><A
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234 HREF="sdlglgetattribute.html"
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235 >Prev</A
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236 ></TD
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237 ><TD
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238 WIDTH="34%"
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239 ALIGN="center"
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240 VALIGN="top"
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241 ><A
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242 HREF="index.html"
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243 >Home</A
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244 ></TD
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245 ><TD
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246 WIDTH="33%"
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247 ALIGN="right"
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248 VALIGN="top"
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249 ><A
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250 HREF="sdlglswapbuffers.html"
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251 >Next</A
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252 ></TD
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253 ></TR
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254 ><TR
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255 ><TD
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256 WIDTH="33%"
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257 ALIGN="left"
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258 VALIGN="top"
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259 >SDL_GL_GetAttribute</TD
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260 ><TD
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261 WIDTH="34%"
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262 ALIGN="center"
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263 VALIGN="top"
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264 ><A
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265 HREF="video.html"
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266 >Up</A
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267 ></TD
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268 ><TD
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269 WIDTH="33%"
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270 ALIGN="right"
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271 VALIGN="top"
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272 >SDL_GL_SwapBuffers</TD
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273 ></TR
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274 ></TABLE
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275 ></DIV
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276 ></BODY
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277 ></HTML
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278 > |
