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Date: Tue, 12 Aug 2003 14:26:19 +0200 (MEST) From: "Mattias Engdeg?rd" Subject: bug in SDL_GetRGB/GetRGBA There's an embarrassing bug in GetRGB/GetRGBA which apparently has been there for years. It incorrectly converts colours with < 8 bits/channel. It came to my attention today in #sdl. What it does now is (for each channel): rv = (pixel & fmt->Rmask) >> fmt->Rshift; *r = (rv << fmt->Rloss) + (rv >> (8 - fmt->Rloss)); which is wrong; the last line should be *r = (rv << fmt->Rloss) + (rv >> (8 - (fmt->Rloss << 1)));
author Sam Lantinga <slouken@libsdl.org>
date Tue, 12 Aug 2003 15:17:20 +0000
parents e5bc29de3f0a
children 546f7c1eb755
line wrap: on
line source

.TH "SDL_JoystickUpdate" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_JoystickUpdate\- Updates the state of all joysticks
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBvoid \fBSDL_JoystickUpdate\fP\fR(\fBvoid\fR);
.SH "DESCRIPTION"
.PP
Updates the state(position, buttons, etc\&.) of all open joysticks\&. If joystick events have been enabled with \fI\fBSDL_JoystickEventState\fP\fR then this is called automatically in the event loop\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_JoystickEventState\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00