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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 d910939febfa
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#ifndef __SDL_PH_IMAGE_H__
#define __SDL_PH_IMAGE_H__

#include "../../events/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__ */