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  4. >SDL_MapRGBA</TITLE
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  71. >SDL_MapRGBA</A
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  76. NAME="AEN1272"
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  78. ><H2
  79. >Name</H2
  80. >SDL_MapRGBA&nbsp;--&nbsp;Map a RGBA color value to a pixel format.</DIV
  81. ><DIV
  82. CLASS="REFSYNOPSISDIV"
  83. ><A
  84. NAME="AEN1275"
  85. ></A
  86. ><H2
  87. >Synopsis</H2
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  91. NAME="AEN1276"
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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_MapRGBA</B
  105. ></CODE
  106. >(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 a);</CODE
  107. ></P
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  114. ><A
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  117. ><H2
  118. >Description</H2
  119. ><P
  120. >Maps the RGBA 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 no alpha component the alpha value
  127. will be ignored (as it will be in formats with a palette).</P
  128. ></DIV
  129. ><DIV
  130. CLASS="REFSECT1"
  131. ><A
  132. NAME="AEN1287"
  133. ></A
  134. ><H2
  135. >Return Value</H2
  136. ><P
  137. >A pixel value best approximating the given RGBA 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="AEN1292"
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  155. ><H2
  156. >See Also</H2
  157. ><P
  158. ><A
  159. HREF="sdlgetrgb.html"
  160. >SDL_GetRGB</A
  161. >,
  162. <A
  163. HREF="sdlgetrgba.html"
  164. >SDL_GetRGBA</A
  165. >,
  166. <A
  167. HREF="sdlmaprgb.html"
  168. >SDL_MapRGB</A
  169. >,
  170. <A
  171. HREF="sdlpixelformat.html"
  172. >SDL_PixelFormat</A
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