e14743d1 |
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 | } |