view src/video/x11/SDL_x11dyn.h @ 1554:0ca607a5d173

Fixed bug #84 Date: Sun, 23 Oct 2005 16:39:03 +0200 From: "A. Schmid" <sahib@phreaker.net> Subject: [SDL] no software surfaces with svgalib driver? Hi, I noticed that the SDL (1.2.9) svgalib driver only makes use of linear addressable (framebuffer) video modes. On older systems (like one of mine), linear addressable modes are often not available. Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is unusable, since VESA only supports framebuffering for VBE 2.0 and later. The changes necessary to add support for software surfaces seem to be relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see attached patch). The code worked fine for me, but it is no more than a proof of concept and should be reviewed (probably has a memory leak when switching modes). It also uses the vgagl library (included in the svgalib package) and needs to be linked against it. -Alex
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 12:04:40 +0000
parents 1f4f09641645
children 3ba88cb7eb1b
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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
*/
#include "SDL_config.h"

#ifndef _SDL_x11dyn_h
#define _SDL_x11dyn_h

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/Xlibint.h>
#include <X11/Xproto.h>

#include "../Xext/extensions/extutil.h"

#ifndef NO_SHARED_MEMORY
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#endif

/*
 * Never reference Xlib directly...we might load it dynamically at runtime.
 *  Even if we don't, for readability, we still use the function pointers
 *  (although the symbol resolution will be done by the loader in that case).
 *
 * We define SDL_X11_SYM and include SDL_x11sym.h to accomplish various
 *  goals, without having to duplicate those function signatures.
 */
#ifdef __cplusplus
extern "C" {
#endif

#ifdef __osf__
extern int _XData32(Display *,register long *,unsigned);
extern void _XRead32(Display *,register long *,long);
extern void _SmtBufferOverflow(Display *,register smtDisplayPtr);
extern void _SmtIpError(Display *,register smtDisplayPtr, int);
extern int ipAllocateData(ChannelPtr, IPCard, IPDataPtr *);
extern int ipUnallocateAndSendData(ChannelPtr, IPCard);
#endif

/* evil function signatures... */
typedef Bool (*SDL_X11_XESetWireToEventRetType)(Display*,XEvent*,xEvent*);
typedef int (*SDL_X11_XSynchronizeRetType)(Display*);
typedef Status (*SDL_X11_XESetEventToWireRetType)(Display*,XEvent*,xEvent*);
typedef int (*SDL_X11_XSetExtensionErrorHandlerType)(Display *,char *,char *);

#define SDL_X11_SYM(req,ret,fn,params) extern ret (*p##fn) params;
#include "SDL_x11sym.h"
#undef SDL_X11_SYM

/* Macro in the xlib headers, not an actual symbol... */
#define pXDestroyImage XDestroyImage

/* Workaround code in headers... */
#if !__SDL_NO_REDEFINE_X11_HEADER_SYMS
#define _XFlush p_XFlush
#define _XFlushGCCache p_XFlushGCCache
#define _XReply p_XReply
#define _XSend p_XSend
#define XFree pXFree
#define _XData32 p_XData32

#if defined(__osf__)
#define _SmtBufferOverflow p_SmtBufferOverflow
#define _SmtIpError p_SmtIpError
#define ipAllocateData pipAllocateData
#define ipUnallocateAndSendData pipUnallocateAndSendData
#endif

#endif /* !__SDL_NO_REDEFINE_X11_HEADER_SYMS */

int SDL_X11_LoadSymbols(void);
void SDL_X11_UnloadSymbols(void);

#ifdef __cplusplus
}
#endif

#endif  /* !defined _SDL_x11dyn_h */