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annotate docs/html/sdlrect.html @ 2787:93764fe8601a

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It turns out both the software and the OpenGL renderer had the same problem. According to the spec, when SDL_SRCALPHA is set, the colorkey is ignored, so we just need to convert the colorkey into the alpha channel.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 25 Nov 2008 05:29:14 +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_Rect</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_GLattr"
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17 HREF="sdlglattr.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_Color"
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20 HREF="sdlcolor.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="sdlglattr.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="sdlcolor.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="SDLRECT"
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74 ></A
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75 >SDL_Rect</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="AEN3046"
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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_Rect&nbsp;--&nbsp;Defines a rectangular area</DIV
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84 ><DIV
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85 CLASS="REFSECT1"
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86 ><A
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87 NAME="AEN3049"
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88 ></A
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89 ><H2
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90 >Structure Definition</H2
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91 ><PRE
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92 CLASS="PROGRAMLISTING"
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93 >typedef struct{
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94 Sint16 x, y;
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95 Uint16 w, h;
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96 } SDL_Rect;</PRE
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97 ></DIV
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98 ><DIV
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99 CLASS="REFSECT1"
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100 ><A
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101 NAME="AEN3052"
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102 ></A
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103 ><H2
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104 >Structure Data</H2
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105 ><DIV
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106 CLASS="INFORMALTABLE"
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107 ><A
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108 NAME="AEN3054"
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109 ></A
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110 ><P
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111 ></P
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112 ><TABLE
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113 BORDER="0"
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114 CLASS="CALSTABLE"
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115 ><TBODY
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116 ><TR
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117 ><TD
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118 ALIGN="LEFT"
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119 VALIGN="TOP"
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120 ><TT
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121 CLASS="STRUCTFIELD"
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122 ><I
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123 >x, y</I
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124 ></TT
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125 ></TD
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126 ><TD
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127 ALIGN="LEFT"
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128 VALIGN="TOP"
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129 >Position of the upper-left corner of the rectangle</TD
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130 ></TR
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131 ><TR
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132 ><TD
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133 ALIGN="LEFT"
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134 VALIGN="TOP"
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135 ><TT
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136 CLASS="STRUCTFIELD"
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137 ><I
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138 >w, h</I
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139 ></TT
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140 ></TD
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141 ><TD
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142 ALIGN="LEFT"
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143 VALIGN="TOP"
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144 >The width and height of the rectangle</TD
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145 ></TR
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146 ></TBODY
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147 ></TABLE
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148 ><P
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149 ></P
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150 ></DIV
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151 ></DIV
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152 ><DIV
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153 CLASS="REFSECT1"
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154 ><A
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155 NAME="AEN3065"
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156 ></A
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157 ><H2
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158 >Description</H2
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159 ><P
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160 >A <SPAN
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161 CLASS="STRUCTNAME"
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162 >SDL_Rect</SPAN
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163 > defines a rectangular area of pixels. It is used by <A
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164 HREF="sdlblitsurface.html"
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165 ><TT
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166 CLASS="FUNCTION"
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167 >SDL_BlitSurface</TT
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168 ></A
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169 > to define blitting regions and by several other video functions.</P
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170 ></DIV
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171 ><DIV
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172 CLASS="REFSECT1"
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173 ><A
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174 NAME="AEN3071"
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175 ></A
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176 ><H2
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177 >See Also</H2
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178 ><P
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179 ><A
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180 HREF="sdlblitsurface.html"
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181 ><TT
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182 CLASS="FUNCTION"
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183 >SDL_BlitSurface</TT
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184 ></A
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185 >,
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186 <A
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187 HREF="sdlupdaterect.html"
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188 ><TT
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189 CLASS="FUNCTION"
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190 >SDL_UpdateRect</TT
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191 ></A
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192 ></P
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193 ></DIV
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194 ><DIV
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195 CLASS="NAVFOOTER"
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196 ><HR
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197 ALIGN="LEFT"
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198 WIDTH="100%"><TABLE
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199 SUMMARY="Footer navigation table"
0
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200 WIDTH="100%"
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201 BORDER="0"
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202 CELLPADDING="0"
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203 CELLSPACING="0"
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204 ><TR
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205 ><TD
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206 WIDTH="33%"
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207 ALIGN="left"
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208 VALIGN="top"
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209 ><A
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210 HREF="sdlglattr.html"
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211 ACCESSKEY="P"
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212 >Prev</A
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213 ></TD
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214 ><TD
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215 WIDTH="34%"
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216 ALIGN="center"
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217 VALIGN="top"
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218 ><A
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219 HREF="index.html"
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220 ACCESSKEY="H"
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221 >Home</A
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222 ></TD
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223 ><TD
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224 WIDTH="33%"
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225 ALIGN="right"
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226 VALIGN="top"
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227 ><A
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228 HREF="sdlcolor.html"
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229 ACCESSKEY="N"
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230 >Next</A
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231 ></TD
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232 ></TR
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233 ><TR
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234 ><TD
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235 WIDTH="33%"
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236 ALIGN="left"
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237 VALIGN="top"
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238 >SDL_GLattr</TD
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239 ><TD
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240 WIDTH="34%"
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241 ALIGN="center"
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242 VALIGN="top"
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243 ><A
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244 HREF="video.html"
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245 ACCESSKEY="U"
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246 >Up</A
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247 ></TD
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248 ><TD
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249 WIDTH="33%"
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250 ALIGN="right"
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251 VALIGN="top"
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252 >SDL_Color</TD
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253 ></TR
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254 ></TABLE
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255 ></DIV
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256 ></BODY
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257 ></HTML
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258 >