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view docs/man3/SDL_Quit.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_Quit" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" .SH "NAME" SDL_Quit\- Shut down SDL .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBvoid \fBSDL_Quit\fP\fR(\fBvoid\fR); .SH "DESCRIPTION" .PP \fBSDL_Quit\fP shuts down all SDL subsystems and frees the resources allocated to them\&. This should always be called before you exit\&. For the sake of simplicity you can set \fBSDL_Quit\fP as your \fBatexit\fP call, like: .PP .nf \f(CWSDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO); atexit(SDL_Quit); \&. \&.\fR .fi .PP .PP .RS \fBNote: .PP While using \fBatexit\fP maybe be fine for small programs, more advanced users should shut down SDL in their own cleanup code\&. Plus, using \fBatexit\fP in a library is a sure way to crash dynamically loaded code .RE .SH "SEE ALSO" .PP \fI\fBSDL_QuitSubsystem\fP\fR, \fI\fBSDL_Init\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00