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| >SDL_MapRGBA</H1 |
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| ><H2 |
| >Name</H2 |
| >SDL_MapRGBA -- Map a RGBA color value to a pixel format.</DIV |
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| >Synopsis</H2 |
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| ><PRE |
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| >#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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| ><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" |
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| NAME="AEN1702" |
| ></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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| NAME="AEN1707" |
| ></A |
| ><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 |
| >, |
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| HREF="sdlpixelformat.html" |
| >SDL_PixelFormat</A |
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