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  4. >SDL_MapRGB</TITLE
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  39. >SDL Library Documentation</TH
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  71. >SDL_MapRGB</A
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  76. NAME="AEN1237"
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  78. ><H2
  79. >Name</H2
  80. >SDL_MapRGB&nbsp;--&nbsp;Map a RGB color value to a pixel format.</DIV
  81. ><DIV
  82. CLASS="REFSYNOPSISDIV"
  83. ><A
  84. NAME="AEN1240"
  85. ></A
  86. ><H2
  87. >Synopsis</H2
  88. ><DIV
  89. CLASS="FUNCSYNOPSIS"
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  91. NAME="AEN1241"
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  93. ><P
  94. ></P
  95. ><PRE
  96. CLASS="FUNCSYNOPSISINFO"
  97. >#include "SDL.h"</PRE
  98. ><P
  99. ><CODE
  100. ><CODE
  101. CLASS="FUNCDEF"
  102. >Uint32 <B
  103. CLASS="FSFUNC"
  104. >SDL_MapRGB</B
  105. ></CODE
  106. >(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b);</CODE
  107. ></P
  108. ><P
  109. ></P
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  113. CLASS="REFSECT1"
  114. ><A
  115. NAME="AEN1247"
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  117. ><H2
  118. >Description</H2
  119. ><P
  120. >Maps the RGB color value to the specified pixel format and returns the
  121. pixel value as a 32-bit int.</P
  122. ><P
  123. >If the format has a palette (8-bit) the index of the closest matching
  124. color in the palette will be returned.</P
  125. ><P
  126. >If the specified pixel format has an alpha component it will be returned
  127. as all 1 bits (fully opaque).</P
  128. ></DIV
  129. ><DIV
  130. CLASS="REFSECT1"
  131. ><A
  132. NAME="AEN1252"
  133. ></A
  134. ><H2
  135. >Return Value</H2
  136. ><P
  137. >A pixel value best approximating the given RGB color value for a given
  138. pixel format. If the pixel format bpp (color depth) is less than 32-bpp
  139. then the unused upper bits of the return value can safely be ignored
  140. (e.g., with a 16-bpp format the return value can be assigned to a
  141. <SPAN
  142. CLASS="TYPE"
  143. >Uint16</SPAN
  144. >, and similarly a <SPAN
  145. CLASS="TYPE"
  146. >Uint8</SPAN
  147. > for an 8-bpp
  148. format).</P
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  150. ><DIV
  151. CLASS="REFSECT1"
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  153. NAME="AEN1257"
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  155. ><H2
  156. >See Also</H2
  157. ><P
  158. ><A
  159. HREF="sdlgetrgb.html"
  160. ><TT
  161. CLASS="FUNCTION"
  162. >SDL_GetRGB</TT
  163. ></A
  164. >,
  165. <A
  166. HREF="sdlgetrgba.html"
  167. ><TT
  168. CLASS="FUNCTION"
  169. >SDL_GetRGBA</TT
  170. ></A
  171. >,
  172. <A
  173. HREF="sdlmaprgba.html"
  174. ><TT
  175. CLASS="FUNCTION"
  176. >SDL_MapRGBA</TT
  177. ></A
  178. >,
  179. <A
  180. HREF="sdlpixelformat.html"
  181. ><SPAN
  182. CLASS="STRUCTNAME"
  183. >SDL_PixelFormat</SPAN
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