annotate docs/html/sdlmaprgb.html @ 3097:0d12e8f1de3c

Date: Thu, 05 Feb 2009 18:07:35 +0100 From: Stefan Klug Subject: [SDL] SDL 1.3 WinCE backend as promised, I've started to work on the WinCE backend of SDL 1.3 I've modified the win32 video backend and the gdi renderer, to work properly in WinCE. The results till now are great, but there is still some work to do. Attached are two patches with my changes. I would be happy if someone could review and propably commit them. The first one (configure.in.patch) should be straight forward without any side effects. The second one does the necessary changes to the win32 backend. I was really unhappy to start slicing this shiny new backend with #ifdef/#endif but I saw no other option. The most problematic issues are: - WinCe has no GetDIBits, so its practically impossible to fill a BITMAPINFO with correct values. I therefore removed the bmi member from the GDI_RenderData in SDL_gdirender.c to prevent usage of a not or not properly initialized bmi. - In SDL_win32window.c I exchanged some ASCII function by their general counterparts, (In CE only the Unicode versions are available). I don't know if this has a negative effect when running in win32 Cheers Stefan
author Sam Lantinga <slouken@libsdl.org>
date Mon, 23 Mar 2009 05:35:21 +0000
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1 <HTML
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3 ><TITLE
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4 >SDL_MapRGB</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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13 TITLE="Video"
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16 TITLE="SDL_SetGammaRamp"
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19 TITLE="SDL_MapRGBA"
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20 HREF="sdlmaprgba.html"></HEAD
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30 ><TABLE
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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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47 ><A
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48 HREF="sdlsetgammaramp.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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60 VALIGN="bottom"
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61 ><A
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62 HREF="sdlmaprgba.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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71 ><H1
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72 ><A
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73 NAME="SDLMAPRGB"
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74 ></A
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75 >SDL_MapRGB</H1
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76 ><DIV
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77 CLASS="REFNAMEDIV"
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78 ><A
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81 ><H2
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82 >Name</H2
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83 >SDL_MapRGB&nbsp;--&nbsp;Map a RGB color value to a pixel format.</DIV
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84 ><DIV
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85 CLASS="REFSYNOPSISDIV"
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86 ><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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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 >Uint32 <B
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106 CLASS="FSFUNC"
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107 >SDL_MapRGB</B
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108 ></CODE
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109 >(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b);</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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120 ><H2
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121 >Description</H2
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122 ><P
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123 >Maps the RGB color value to the specified pixel format and returns the
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124 pixel value as a 32-bit int.</P
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125 ><P
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126 >If the format has a palette (8-bit) the index of the closest matching
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127 color in the palette will be returned.</P
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128 ><P
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129 >If the specified pixel format has an alpha component it will be returned
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130 as all 1 bits (fully opaque).</P
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131 ></DIV
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132 ><DIV
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133 CLASS="REFSECT1"
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134 ><A
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136 ></A
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137 ><H2
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138 >Return Value</H2
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139 ><P
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140 >A pixel value best approximating the given RGB color value for a given
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141 pixel format. If the pixel format bpp (color depth) is less than 32-bpp
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142 then the unused upper bits of the return value can safely be ignored
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143 (e.g., with a 16-bpp format the return value can be assigned to a
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144 <SPAN
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145 CLASS="TYPE"
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146 >Uint16</SPAN
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147 >, and similarly a <SPAN
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148 CLASS="TYPE"
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149 >Uint8</SPAN
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150 > for an 8-bpp
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151 format).</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="AEN1672"
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157 ></A
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158 ><H2
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159 >See Also</H2
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160 ><P
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161 ><A
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162 HREF="sdlgetrgb.html"
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163 ><TT
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164 CLASS="FUNCTION"
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165 >SDL_GetRGB</TT
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166 ></A
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167 >,
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168 <A
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169 HREF="sdlgetrgba.html"
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170 ><TT
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171 CLASS="FUNCTION"
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172 >SDL_GetRGBA</TT
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173 ></A
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174 >,
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175 <A
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176 HREF="sdlmaprgba.html"
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177 ><TT
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178 CLASS="FUNCTION"
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179 >SDL_MapRGBA</TT
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180 ></A
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181 >,
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182 <A
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183 HREF="sdlpixelformat.html"
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184 ><SPAN
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185 CLASS="STRUCTNAME"
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186 >SDL_PixelFormat</SPAN
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187 ></A
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188 ></P
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189 ></DIV
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190 ><DIV
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191 CLASS="NAVFOOTER"
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192 ><HR
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193 ALIGN="LEFT"
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194 WIDTH="100%"><TABLE
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195 SUMMARY="Footer navigation table"
0
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196 WIDTH="100%"
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197 BORDER="0"
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198 CELLPADDING="0"
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199 CELLSPACING="0"
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200 ><TR
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201 ><TD
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202 WIDTH="33%"
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203 ALIGN="left"
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204 VALIGN="top"
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205 ><A
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206 HREF="sdlsetgammaramp.html"
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207 ACCESSKEY="P"
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208 >Prev</A
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209 ></TD
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210 ><TD
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211 WIDTH="34%"
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212 ALIGN="center"
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213 VALIGN="top"
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214 ><A
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215 HREF="index.html"
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216 ACCESSKEY="H"
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217 >Home</A
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218 ></TD
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219 ><TD
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220 WIDTH="33%"
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221 ALIGN="right"
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222 VALIGN="top"
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223 ><A
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224 HREF="sdlmaprgba.html"
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225 ACCESSKEY="N"
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226 >Next</A
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227 ></TD
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228 ></TR
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229 ><TR
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230 ><TD
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231 WIDTH="33%"
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232 ALIGN="left"
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233 VALIGN="top"
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234 >SDL_SetGammaRamp</TD
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235 ><TD
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236 WIDTH="34%"
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237 ALIGN="center"
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238 VALIGN="top"
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239 ><A
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240 HREF="video.html"
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241 ACCESSKEY="U"
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242 >Up</A
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243 ></TD
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244 ><TD
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245 WIDTH="33%"
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246 ALIGN="right"
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247 VALIGN="top"
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248 >SDL_MapRGBA</TD
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249 ></TR
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250 ></TABLE
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251 ></DIV
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252 ></BODY
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253 ></HTML
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254 >