View Source: SDL_MapRGBA(3) - Waikato Linux Users Group

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SDL_MapRGBA
!!!SDL_MapRGBA
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO
----
!!NAME


SDL_MapRGBA- Map a RGBA color value to a pixel format.
!!SYNOPSIS


__#include __


__Uint32 SDL_MapRGBA__(__SDL_!PixelFormat *fmt, Uint8 r,
Uint8 g, Uint8 b, Uint8 a__);
!!DESCRIPTION


Maps the RGBA color value to the specified pixel format and
returns the pixel value as a 32-bit int.


If the format has a palette (8-bit) the index of the closest
matching color in the palette will be returned.


If the specified pixel format has no alpha component the
alpha value will be ignored (as it will be in formats with a
palette).
!!RETURN VALUE


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 __Uint16__,
and similarly a __Uint8__ for an 8-bpp
format).
!!SEE ALSO


''SDL_GetRGB'', ''SDL_GetRGBA'', ''SDL_MapRGB'',
''SDL_!PixelFormat''
----

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Last edited on Monday, June 3, 2002 6:53:46 pm by "perry"

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