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- ><A
- NAME="AEN1305"
- ></A
- ><H2
- >Name</H2
- >SDL_MapRGBA -- Map a RGBA color value to a pixel format.</DIV
- ><DIV
- CLASS="REFSYNOPSISDIV"
- ><A
- NAME="AEN1308"
- ></A
- ><H2
- >Synopsis</H2
- ><DIV
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- NAME="AEN1309"
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- ><P
- ></P
- ><PRE
- CLASS="FUNCSYNOPSISINFO"
- >#include "SDL.h"</PRE
- ><P
- ><CODE
- ><CODE
- CLASS="FUNCDEF"
- >Uint32 <B
- CLASS="FSFUNC"
- >SDL_MapRGBA</B
- ></CODE
- >(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 a);</CODE
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- CLASS="REFSECT1"
- ><A
- NAME="AEN1315"
- ></A
- ><H2
- >Description</H2
- ><P
- >Maps the RGBA color value to the specified pixel format and returns the
- pixel value as a 32-bit int.</P
- ><P
- >If the format has a palette (8-bit) the index of the closest matching
- color in the palette will be returned.</P
- ><P
- >If the specified pixel format has no alpha component the alpha value
- will be ignored (as it will be in formats with a palette).</P
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- CLASS="REFSECT1"
- ><A
- NAME="AEN1320"
- ></A
- ><H2
- >Return Value</H2
- ><P
- >A pixel value best approximating the given RGBA color value for a given
- pixel format. If the pixel format bpp (color depth) is less than 32-bpp
- then the unused upper bits of the return value can safely be ignored
- (e.g., with a 16-bpp format the return value can be assigned to a
- <SPAN
- CLASS="TYPE"
- >Uint16</SPAN
- >, and similarly a <SPAN
- CLASS="TYPE"
- >Uint8</SPAN
- > for an 8-bpp
- format).</P
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- ><H2
- >See Also</H2
- ><P
- ><A
- HREF="sdlgetrgb.html"
- >SDL_GetRGB</A
- >,
- <A
- HREF="sdlgetrgba.html"
- >SDL_GetRGBA</A
- >,
- <A
- HREF="sdlmaprgb.html"
- >SDL_MapRGB</A
- >,
- <A
- HREF="sdlpixelformat.html"
- >SDL_PixelFormat</A
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