Mercurial > sdl-ios-xcode
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 */