/*

    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"

/*

	ScreenBlaster 3 functions

	Patrice Mandin

*/

/*--- Includes ---*/

#include "SDL_stdinc.h"

#include "SDL_xbios.h"

#include "SDL_xbios_sb3.h"

/*--- Defines ---*/

const int SDL_XBIOS_scpn_planes_device[]={

	SCPN_DEV_1BPP,

	SCPN_DEV_4BPP,

	SCPN_DEV_8BPP,

	SCPN_DEV_16BPP,

	SCPN_DEV_2BPP,

	SCPN_DEV_4BPP,

	SCPN_DEV_1BPP

};

/*--- Functions ---*/

int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn)

{

	scpn_screeninfo_t *scrinfo;

	int bpp;

	/* Check if current SB3 mode is usable, i.e. 8 or 16bpp */

	scrinfo = cookie_scpn->screen_info;

	bpp = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]);

	if ((bpp==8) || (bpp==16)) {

		return 1;

	}

	return 0;

}

void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn)

{

	scpn_screeninfo_t *scrinfo;

	/* SB3 prevent changing video modes, we can only use current one */

	if (XBIOS_modelist) {

		SDL_free(XBIOS_modelist);

		XBIOS_nummodes = 0;

		XBIOS_modelist = NULL;

	}

	scrinfo = cookie_scpn->screen_info;

	scrinfo->h_pos = scrinfo->v_pos = 0;

	SDL_XBIOS_AddMode(this,

		-1,

		scrinfo->virtual_width, scrinfo->virtual_height,

		1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]),

		SDL_FALSE

	);

}