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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2004 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* |
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25 ScreenBlaster 3 functions |
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26 |
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27 Patrice Mandin |
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28 */ |
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29 |
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30 /*--- Includes ---*/ |
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31 |
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32 #include "SDL_stdinc.h" |
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33 #include "SDL_xbios.h" |
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34 #include "SDL_xbios_sb3.h" |
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35 |
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36 /*--- Defines ---*/ |
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37 |
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38 const int SDL_XBIOS_scpn_planes_device[]={ |
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39 SCPN_DEV_1BPP, |
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40 SCPN_DEV_4BPP, |
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41 SCPN_DEV_8BPP, |
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42 SCPN_DEV_16BPP, |
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43 SCPN_DEV_2BPP, |
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44 SCPN_DEV_4BPP, |
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45 SCPN_DEV_1BPP |
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46 }; |
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47 |
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48 /*--- Functions ---*/ |
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49 |
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50 int SDL_XBIOS_SB3Usable(scpn_cookie_t *cookie_scpn) |
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51 { |
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52 scpn_screeninfo_t *scrinfo; |
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53 int bpp; |
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54 |
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55 /* Check if current SB3 mode is usable, i.e. 8 or 16bpp */ |
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56 scrinfo = cookie_scpn->screen_info; |
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57 bpp = 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]); |
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58 |
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59 if ((bpp==8) || (bpp==16)) { |
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60 return 1; |
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61 } |
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62 |
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63 return 0; |
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64 } |
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65 |
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66 void SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t *cookie_scpn) |
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67 { |
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68 scpn_screeninfo_t *scrinfo; |
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69 |
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70 /* SB3 prevent changing video modes, we can only use current one */ |
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71 if (XBIOS_modelist) { |
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72 SDL_free(XBIOS_modelist); |
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73 XBIOS_nummodes = 0; |
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74 XBIOS_modelist = NULL; |
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75 } |
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76 |
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77 scrinfo = cookie_scpn->screen_info; |
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78 scrinfo->h_pos = scrinfo->v_pos = 0; |
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79 |
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80 SDL_XBIOS_AddMode(this, |
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81 -1, |
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82 scrinfo->virtual_width, scrinfo->virtual_height, |
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83 1<<(SDL_XBIOS_scpn_planes_device[scrinfo->device]), |
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84 SDL_FALSE |
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85 ); |
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86 } |