Mercurial > sdl-ios-xcode
view docs/man3/SDL_JoystickEventState.3 @ 997:3bf4103b2b89
Date: Sat, 27 Nov 2004 13:35:43 +0100
From: "Martin Bickel"
Subject: [SDL] Patch: fixing uninitilized palette
while running Valgrind over my application I found the following
problem in SDL:
The function MapNto1 allocates SDL_Color colors[256] but does not
initialize it.
SDL_DitherColors is then called which initialized the r, g and b
component, but not the 'unused' component of each color.
When Map1to1 is called from MapNto1, it runs a memcmp on the colors,
which also evaluates the unused component and therefor returns
differences much more often than necessary.
So the 'unused' component of SDL_Color should be initialized. This
patch does this by calling memset for the whole array in MapNto1 .
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 30 Nov 2004 14:28:20 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
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.TH "SDL_JoystickEventState" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" .SH "NAME" SDL_JoystickEventState\- Enable/disable joystick event polling .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBint \fBSDL_JoystickEventState\fP\fR(\fBint state\fR); .SH "DESCRIPTION" .PP This function is used to enable or disable joystick event processing\&. With joystick event processing disabled you will have to update joystick states with \fI\fBSDL_JoystickUpdate\fP\fR and read the joystick information manually\&. \fBstate\fR is either \fBSDL_QUERY\fP, \fBSDL_ENABLE\fP or \fBSDL_IGNORE\fP\&. .PP .RS \fBNote: .PP Joystick event handling is prefered .RE .SH "RETURN VALUE" .PP If \fBstate\fR is \fBSDL_QUERY\fP then the current state is returned, otherwise the new processing \fBstate\fR is returned\&. .SH "SEE ALSO" .PP \fISDL Joystick Functions\fR, \fI\fBSDL_JoystickUpdate\fP\fR, \fI\fBSDL_JoyAxisEvent\fR\fR, \fI\fBSDL_JoyBallEvent\fR\fR, \fI\fBSDL_JoyButtonEvent\fR\fR, \fI\fBSDL_JoyHatEvent\fR\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59