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><A |
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>SDL_MapRGBA</A |
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><A |
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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 |
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>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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><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 |
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>SDL_GetRGB</A |
>, |
<A |
HREF="sdlgetrgba.html" |
>SDL_GetRGBA</A |
>, |
<A |
HREF="sdlmaprgb.html" |
>SDL_MapRGB</A |
>, |
<A |
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>SDL_PixelFormat</A |
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