redhat man page for sdl_maprgb

SDL_MapRGB(3)							 SDL API Reference						     SDL_MapRGB(3)

NAME
       SDL_MapRGB- Map a RGB color value to a pixel format.

SYNOPSIS
       #include "SDL.h"

       Uint32 SDL_MapRGB(SDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b);

DESCRIPTION
       Maps the RGB 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 an alpha component it will be returned as all 1 bits (fully opaque).

RETURN VALUE
       A  pixel  value	best  approximating the given RGB 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_MapRGBA, SDL_PixelFormat

SDL
							      Tue 11 Sep 2001, 23:01						     SDL_MapRGB(3)