comparison docs/man3/SDL_MapRGBA.3 @ 0:74212992fb08

Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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1 .TH "SDL_MapRGBA" "3" "Mon 12 Mar 2001, 01:04" "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, Mon 12 Mar 2001, 01:04