Mercurial > sdl-ios-xcode
view docs/man3/SDL_JoystickGetHat.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_JoystickGetHat" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" .SH "NAME" SDL_JoystickGetHat\- Get the current state of a joystick hat .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBUint8 \fBSDL_JoystickGetHat\fP\fR(\fBSDL_Joystick *joystick, int hat\fR); .SH "DESCRIPTION" .PP SDL_JoystickGetHat returns the current state of the given \fBhat\fR on the given \fBjoystick\fR\&. .SH "RETURN VALUE" .PP The current state is returned as a Uint8 which is defined as an OR\&'d combination of one or more of the following .IP "" 10 \fBSDL_HAT_CENTERED\fP .IP "" 10 \fBSDL_HAT_UP\fP .IP "" 10 \fBSDL_HAT_RIGHT\fP .IP "" 10 \fBSDL_HAT_DOWN\fP .IP "" 10 \fBSDL_HAT_LEFT\fP .IP "" 10 \fBSDL_HAT_RIGHTUP\fP .IP "" 10 \fBSDL_HAT_RIGHTDOWN\fP .IP "" 10 \fBSDL_HAT_LEFTUP\fP .IP "" 10 \fBSDL_HAT_LEFTDOWN\fP .SH "SEE ALSO" .PP \fI\fBSDL_JoystickNumHats\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00