Disable TurboVeille screensaver if present

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402250

src/video/xbios/SDL_xbios.c

@@ -49,6 +49,7 @@
 #include "SDL_xbios_blowup.h"
 #include "SDL_xbios_centscreen.h"
 #include "SDL_xbios_sb3.h"
+#include "SDL_xbios_tveille.h"
 
 #define XBIOS_VID_DRIVER_NAME "xbios"
 
@@ -464,6 +465,11 @@ static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
 	SDL_AtariGL_InitPointers(this);
 #endif
 
+	/* Disable screensavers */
+	if (SDL_XBIOS_TveillePresent(this)) {
+		SDL_XBIOS_TveilleDisable(this);
+	}
+
 	/* We're done! */
 	return(0);
 }
@@ -928,6 +934,11 @@ static void XBIOS_VideoQuit(_THIS)
 	}
 
 	this->screen->pixels = NULL;	
+
+	/* Restore screensavers */
+	if (SDL_XBIOS_TveillePresent(this)) {
+		SDL_XBIOS_TveilleRestore(this);
+	}
 }
 
 #if SDL_VIDEO_OPENGL

src/video/xbios/SDL_xbios_tveille.c

+/*
+    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"
+
+/*
+	Turbo veille screensaver
+
+	Patrice Mandin
+*/
+
+#include <mint/cookie.h>
+
+#include "SDL_xbios.h"
+#include "SDL_xbios_tveille.h"
+
+static tveille_t *cookie_veil;
+static int status;
+
+int SDL_XBIOS_TveillePresent(_THIS)
+{
+	return (Getcookie(C_VeiL, (unsigned long *)&cookie_veil) == C_FOUND);
+}
+
+void SDL_XBIOS_TveilleDisable(_THIS)
+{
+	status = cookie_veil->enabled;
+	cookie_veil->enabled = 0xff;
+}
+
+void SDL_XBIOS_TveilleRestore(_THIS)
+{
+	cookie_veil->enabled = status;
+}

src/video/xbios/SDL_xbios_tveille.h

+/*
+    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"
+
+/*
+	Turbo veille screensaver
+
+	Patrice Mandin
+*/
+
+#ifndef _SDL_xbios_tveille_h
+#define _SDL_xbios_tveille_h
+
+#include "SDL_xbios.h"
+
+/*--- Defines ---*/
+
+#ifndef C_VeiL
+#define C_VeiL 0x5665694CL
+#endif
+
+/*--- Structures ---*/
+
+typedef struct {
+	unsigned long	version;
+	void		(*prg_ptr)();
+	void		(*kbd_ptr)();
+	void		(*vbl_ptr)();
+	unsigned long	vbl_count;
+	void		(*oldkbd_ptr)();
+	unsigned long	off_count;
+	unsigned long	prg_size;
+	unsigned long	dummy1[4];
+	unsigned char	dummy2;
+	unsigned char	status;
+	unsigned short	freq;
+	unsigned short	dummy3;
+	unsigned char	clear_first;
+	unsigned char	enabled;	/* 0=enabled, 0xff=disabled */
+	unsigned char	serial_redir;
+	unsigned char	dummy4;
+	void		(*oldserial_ptr)();
+} __attribute__((packed)) tveille_t;
+
+/*--- Functions prototypes ---*/
+
+int SDL_XBIOS_TveillePresent(_THIS);
+void SDL_XBIOS_TveilleDisable(_THIS);
+void SDL_XBIOS_TveilleEnable(_THIS);
+
+#endif /* _SDL_xbios_tveille_h */