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annotate docs/html/sdlvideomodeok.html @ 1588:e20dcef5647c

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Improved DirectFB install detection
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 09:18:10 +0000
parents 355632dca928
children
rev   line source
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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >SDL_VideoModeOK</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_ListModes"
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17 HREF="sdllistmodes.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_SetVideoMode"
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20 HREF="sdlsetvideomode.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"
0
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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="sdllistmodes.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="sdlsetvideomode.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="SDLVIDEOMODEOK"
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74 ></A
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75 >SDL_VideoModeOK</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="AEN1202"
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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_VideoModeOK&nbsp;--&nbsp;Check to see if a particular video mode is supported.</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="AEN1205"
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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="AEN1206"
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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_VideoModeOK</B
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108 ></CODE
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109 >(int width, int height, int bpp, 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="AEN1212"
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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_VideoModeOK</TT
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126 > returns <SPAN
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127 CLASS="RETURNVALUE"
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128 >0</SPAN
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129 >
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130 if the requested mode is not supported under any bit depth, or returns the
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131 bits-per-pixel of the closest available mode with the given width, height and requested <A
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132 HREF="sdlsurface.html"
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133 >surface</A
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134 > flags (see <A
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135 HREF="sdlsetvideomode.html"
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136 ><TT
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137 CLASS="FUNCTION"
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138 >SDL_SetVideoMode</TT
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139 ></A
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140 >).</P
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141 ><P
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142 >The bits-per-pixel value returned is only a suggested mode. You can usually request and bpp you want when <A
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143 HREF="sdlsetvideomode.html"
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144 >setting</A
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145 > the video mode and SDL will emulate that color depth with a shadow video surface.</P
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146 ><P
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147 >The arguments to <TT
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148 CLASS="FUNCTION"
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149 >SDL_VideoModeOK</TT
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150 > are the same ones you
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151 would pass to <A
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152 HREF="sdlsetvideomode.html"
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153 >SDL_SetVideoMode</A
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154 ></P
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155 ></DIV
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156 ><DIV
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157 CLASS="REFSECT1"
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158 ><A
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159 NAME="AEN1225"
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160 ></A
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161 ><H2
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162 >Example</H2
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163 ><PRE
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164 CLASS="PROGRAMLISTING"
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165 >SDL_Surface *screen;
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166 Uint32 bpp;
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167 .
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168 .
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169 .
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170 printf("Checking mode 640x480@16bpp.\n");
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171 bpp=SDL_VideoModeOK(640, 480, 16, SDL_HWSURFACE);
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172
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173 if(!bpp){
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174 printf("Mode not available.\n");
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175 exit(-1);
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176 }
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177
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178 printf("SDL Recommends 640x480@%dbpp.\n", bpp);
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179 screen=SDL_SetVideoMode(640, 480, bpp, SDL_HWSURFACE);
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180 .
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181 .</PRE
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182 ></DIV
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183 ><DIV
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184 CLASS="REFSECT1"
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185 ><A
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186 NAME="AEN1228"
0
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187 ></A
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188 ><H2
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189 >See Also</H2
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190 ><P
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191 ><A
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192 HREF="sdlsetvideomode.html"
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193 ><TT
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194 CLASS="FUNCTION"
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195 >SDL_SetVideoMode</TT
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196 ></A
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197 >,
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198 <A
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199 HREF="sdlgetvideoinfo.html"
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200 ><TT
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201 CLASS="FUNCTION"
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202 >SDL_GetVideoInfo</TT
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203 ></A
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204 ></P
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205 ></DIV
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206 ><DIV
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207 CLASS="NAVFOOTER"
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208 ><HR
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209 ALIGN="LEFT"
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210 WIDTH="100%"><TABLE
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211 SUMMARY="Footer navigation table"
0
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212 WIDTH="100%"
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213 BORDER="0"
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214 CELLPADDING="0"
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215 CELLSPACING="0"
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216 ><TR
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217 ><TD
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218 WIDTH="33%"
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219 ALIGN="left"
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220 VALIGN="top"
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221 ><A
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222 HREF="sdllistmodes.html"
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223 ACCESSKEY="P"
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224 >Prev</A
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225 ></TD
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226 ><TD
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227 WIDTH="34%"
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228 ALIGN="center"
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229 VALIGN="top"
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230 ><A
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231 HREF="index.html"
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232 ACCESSKEY="H"
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233 >Home</A
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234 ></TD
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235 ><TD
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236 WIDTH="33%"
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237 ALIGN="right"
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238 VALIGN="top"
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239 ><A
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240 HREF="sdlsetvideomode.html"
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241 ACCESSKEY="N"
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242 >Next</A
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243 ></TD
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244 ></TR
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245 ><TR
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246 ><TD
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247 WIDTH="33%"
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248 ALIGN="left"
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249 VALIGN="top"
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250 >SDL_ListModes</TD
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251 ><TD
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252 WIDTH="34%"
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253 ALIGN="center"
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254 VALIGN="top"
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255 ><A
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256 HREF="video.html"
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257 ACCESSKEY="U"
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258 >Up</A
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259 ></TD
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260 ><TD
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261 WIDTH="33%"
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262 ALIGN="right"
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263 VALIGN="top"
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264 >SDL_SetVideoMode</TD
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265 ></TR
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266 ></TABLE
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267 ></DIV
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268 ></BODY
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269 ></HTML
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270 >