1 .TH "SDL_MapRGBA" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 

     2 .SH "NAME"

     3 SDL_MapRGBA \- Map a RGBA color value to a pixel format\&.

     4 .SH "SYNOPSIS"

     5 .PP

     6 \fB#include "SDL\&.h"

     7 .sp

     8 \fBUint32 \fBSDL_MapRGBA\fP\fR(\fBSDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 a\fR);

     9 .SH "DESCRIPTION"

    10 .PP

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

    12 .PP

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

    14 .PP

    15 If the specified pixel format has no alpha component the alpha value will be ignored (as it will be in formats with a palette)\&.

    16 .SH "RETURN VALUE"

    17 .PP

    18 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 \fBUint16\fP, and similarly a \fBUint8\fP for an 8-bpp format)\&.

    19 .SH "SEE ALSO"

    20 .PP

    21 \fISDL_GetRGB\fR, \fISDL_GetRGBA\fR, \fISDL_MapRGB\fR, \fISDL_PixelFormat\fR

    22 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01