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Date: Sat, 10 Jul 2004 21:02:33 +0200 From: "Philippe Plantier (ayin)" Subject: [SDL] Problems allocating large surfaces There are problems when allocating large surfaces using SDL_CreateRGBSurface. When, for example, we try to allocate a surface wider than 16384 pixels, the calculation of the pitch overflows; this leads to a surface that has the w and h flags correctly set, but whose "pixels" buffer is too small. That may lead to heap corruption.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 21 Aug 2004 05:29:45 +0000
parents b8d311d90021
children c9b51268668f
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

#ifndef _SDL_lowaudio_h
#define _SDL_lowaudio_h

#include "directx.h"

#include "SDL_sysaudio.h"

/* Hidden "this" pointer for the video functions */
#define _THIS	SDL_AudioDevice *this

/* The DirectSound objects */
struct SDL_PrivateAudioData {
	LPDIRECTSOUND sound;
	LPDIRECTSOUNDBUFFER mixbuf;
	int NUM_BUFFERS;
	int mixlen, silence;
	DWORD playing;
	Uint8 *locked_buf;
	HANDLE audio_event;
};

/* Old variable names */
#define sound			(this->hidden->sound)
#define mixbuf			(this->hidden->mixbuf)
#define NUM_BUFFERS		(this->hidden->NUM_BUFFERS)
#define mixlen			(this->hidden->mixlen)
#define silence			(this->hidden->silence)
#define playing			(this->hidden->playing)
#define locked_buf		(this->hidden->locked_buf)
#define audio_event		(this->hidden->audio_event)

#endif /* _SDL_lowaudio_h */