view docs/man3/SDL_MapRGBA.3 @ 897:9e27fdb98eab

Date: Tue, 11 May 2004 22:05:32 -0400 From: Bob Ippolito Subject: [SDL] SDL_QuartzWM patches I've sent in two small patches to SDL_QuartzWM directly to Sam over the past few months (well, I think I sent both anyway) and neither of them have been implemented. I didn't receive a response, so I'm sure he was just busy and/or they got lost, so I decided to sign up to the list and post them here. This patch rolls both of them together: - Mouse cursor becomes visible if hidden when it moves outside of the game window. If you want it to stay invisible you should warp it because if it's not warped a user might click some random other application! Commercial games behave in this way (or at least Warcraft III does, which is the only one that uses a custom mouse cursor and no warping that I've played in recent memory). - Right mouse button emulation is changed from Command-Click to Control-Click, which is how OS X behaves. Consider copyright assigned to whomever needs it under whichever license it needs to be under.. yadda yadda yadda.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 May 2004 00:16:24 +0000
parents e5bc29de3f0a
children 546f7c1eb755
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.TH "SDL_MapRGBA" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_MapRGBA\- Map a RGBA color value to a pixel format\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBUint32 \fBSDL_MapRGBA\fP\fR(\fBSDL_PixelFormat *fmt, Uint8 r, Uint8 g, Uint8 b, Uint8 a\fR);
.SH "DESCRIPTION"
.PP
Maps the RGBA 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 no alpha component the alpha value will be ignored (as it will be in formats with a palette)\&.
.SH "RETURN VALUE"
.PP
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)\&.
.SH "SEE ALSO"
.PP
\fISDL_GetRGB\fR, \fISDL_GetRGBA\fR, \fISDL_MapRGB\fR, \fISDL_PixelFormat\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01