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Date: Mon, 10 Oct 2005 13:09:32 +0300 From: Tommi Kyntola <tommi.kyntola@ray.fi> To: sdl@libsdl.org Subject: [SDL] [RFC] get_ticks broken on linux It uses gettimeofday to calculate the timedifference. Gettimeofday returns current time which is seldom monotonous. This breaks SDL timer subsystem. (time callbacks and all that get borked when the time difference ms is suddenly ~ 2^32) I posted a message about this earlier but got no response. Some thoughts on this matter would be appreciated. (Or even an explanation for the lack of interest.) A patch below would use the posix timers that have been around since posix 93 and do provide a good source of monotonous time on linux boxes (and on few others too). The following patch is also availabe at: http://www.hut.fi/u/tkyntola/SDL-1.2.9-clockfix.patch It's against 1.2.9, but I can easily rediffit against the cvs branch is needed. cheers, Tommi Kyntola tommi.kyntola@ray.fi
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 11 Oct 2005 18:16:12 +0000
parents 30168104389f
children c9b51268668f
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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
*/

#ifndef __SDL_PH_IMAGE_H__
#define __SDL_PH_IMAGE_H__

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

#include "SDL_events_c.h"
#include "SDL_ph_video.h"

struct private_hwdata
{
   PdOffscreenContext_t* offscreenctx;
   PdOSCCreateLockParams_t crlockparam;
   PdOSCLockParams_t lockparam;
   Uint32 colorkey;
};

extern int ph_SetupImage(_THIS, SDL_Surface* screen);
extern void ph_DestroyImage(_THIS, SDL_Surface* screen);
extern int ph_SetupUpdateFunction(_THIS, SDL_Surface* screen, Uint32 flags);

extern int ph_AllocHWSurface(_THIS, SDL_Surface* surface);
extern void ph_FreeHWSurface(_THIS, SDL_Surface* surface);
extern int ph_CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst);
extern int ph_FillHWRect(_THIS, SDL_Surface* surface, SDL_Rect* rect, Uint32 color);
extern int ph_LockHWSurface(_THIS, SDL_Surface* surface);
extern void ph_UnlockHWSurface(_THIS, SDL_Surface* surface);
extern int ph_FlipHWSurface(_THIS, SDL_Surface* surface);
extern int ph_SetHWColorKey(_THIS, SDL_Surface* surface, Uint32 key);
extern int ph_SetHWAlpha(_THIS, SDL_Surface* surface, Uint8 alpha);
extern int ph_HWAccelBlit(SDL_Surface* src, SDL_Rect *srcrect, SDL_Surface* dst, SDL_Rect* dstrect);
extern int ph_UpdateHWInfo(_THIS);

extern void ph_NormalUpdate(_THIS, int numrects, SDL_Rect* rects);
extern void ph_OCUpdate(_THIS, int numrects, SDL_Rect* rects);
extern void ph_OCDCUpdate(_THIS, int numrects, SDL_Rect* rects);
extern void ph_OpenGLUpdate(_THIS, int numrects, SDL_Rect* rects);

#endif /* __SDL_PH_IMAGE_H__ */