view docs/man3/SDL_MapRGB.3 @ 3293:0d60bdebed39

Fixed bug #674 Matej 2009-01-08 09:25:34 PST Hello, I maintain a cross-platform project that uses SDL. One of the users who runs OSX has told me that he has problems with linking to SDL due to missing -framework option. I think that the problem is because of this: 'sdl-config --libs' outputs '-L/opt/local/lib -lSDLmain -lSDL -Wl,-framework,Cocoa' All the options are passed to the linker except the last one. I think that the good output should be just: '-L/opt/local/lib -lSDLmain -lSDL -framework Cocoa' since those options (--libs) are passed to the linker, so the '-Wl' option is redundant and possibly harmful in this very case I use autotools with libtool to do the build... Regards, Matej
author Sam Lantinga <slouken@libsdl.org>
date Mon, 21 Sep 2009 10:23:19 +0000
parents 546f7c1eb755
children 1238da4a7112
line wrap: on
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.TH "SDL_MapRGB" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_MapRGB \- Map a RGB color value to a pixel format\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBUint32 \fBSDL_MapRGB\fP\fR(\fBSDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b\fR);
.SH "DESCRIPTION"
.PP
Maps the RGB color value to the specified pixel format and returns the pixel value as a 32-bit int\&.
.PP
If the format has a palette (8-bit) the index of the closest matching color in the palette will be returned\&.
.PP
If the specified pixel format has an alpha component it will be returned as all 1 bits (fully opaque)\&.
.SH "RETURN VALUE"
.PP
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 \fBUint16\fP, and similarly a \fBUint8\fP for an 8-bpp format)\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_GetRGB\fP\fR, \fI\fBSDL_GetRGBA\fP\fR, \fI\fBSDL_MapRGBA\fP\fR, \fI\fBSDL_PixelFormat\fR\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01