| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Library General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Library General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Library General Public |
| 16 | License along with this library; if not, write to the Free |
| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* |
| 25 | ScreenBlaster 3 functions |
| 26 | |
| 27 | Patrice Mandin |
| 28 | */ |
| 29 | |
| 30 | /*--- Includes ---*/ |
| 31 | |
| 32 | #include "SDL_stdinc.h" |
| 33 | #include "SDL_xbios.h" |
| 34 | #include "SDL_xbios_sb3.h" |
| 35 | |
| 36 | /*--- Defines ---*/ |
| 37 | |
| 38 | const int SDL_XBIOS_scpn_planes_device[]={ |
| 39 | SCPN_DEV_1BPP, |
| 40 | SCPN_DEV_4BPP, |
| 41 | SCPN_DEV_8BPP, |
| 42 | SCPN_DEV_16BPP, |
| 43 | SCPN_DEV_2BPP, |
| 44 | SCPN_DEV_4BPP, |
| 45 | SCPN_DEV_1BPP |
| 46 | }; |
| 47 | |
| 48 | /*--- Functions ---*/ |
| 49 | |
| 50 | int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn) |
| 51 | { |
| 52 | scpn_screeninfo_t *scrinfo; |
| 53 | int bpp; |
| 54 | |
| 55 | /* Check if current SB3 mode is usable, i.e. 8 or 16bpp */ |
| 56 | scrinfo = cookie_scpn->screen_info; |
| 57 | bpp = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]); |
| 58 | |
| 59 | if ((bpp==8) || (bpp==16)) { |
| 60 | return 1; |
| 61 | } |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | void SDL_XBIOS_ListSB3Modes(_THIS, int actually_add, scpn_cookie_t *cookie_scpn) |
| 67 | { |
| 68 | scpn_screeninfo_t *scrinfo; |
| 69 | xbiosmode_t modeinfo; |
| 70 | |
| 71 | scrinfo = cookie_scpn->screen_info; |
| 72 | if (actually_add) { |
| 73 | scrinfo->h_pos = scrinfo->v_pos = 0; |
| 74 | } |
| 75 | |
| 76 | modeinfo.number = -1; |
| 77 | modeinfo.width = scrinfo->virtual_width; |
| 78 | modeinfo.height = scrinfo->virtual_height; |
| 79 | modeinfo.depth = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]); |
| 80 | modeinfo.flags = (modeinfo.depth == 8 ? XBIOSMODE_C2P : 0); |
| 81 | |
| 82 | SDL_XBIOS_AddMode(this, actually_add, &modeinfo); |
| 83 | } |