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SDL_xbios_sb3.c
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SDL_xbios_sb3.c
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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
*/
/*
ScreenBlaster 3 functions
Patrice Mandin
*/
/*--- Includes ---*/
#include <stdlib.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) {
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
);
}