Mercurial > sdl-ios-xcode

annotate src/video/xbios/SDL_xbios_sb3.c @ 3846:66fb40445587 SDL-ryan-multiple-audio-device

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Removed distinction between "available" and "init" in audio backends, since both had to be checked for success as a pair at the higher level and several of the Available methods were just always-succeed placeholders anyhow. Now the availability check is done in the init code, and the higher level tries all possible drivers until one manages to initialize successfully.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 09:09:21 +0000
parents c121d94672cb
children 0e751c1f83f5
rev   line source
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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
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51 SDL_XBIOS_SB3Usable(scpn_cookie_t * cookie_scpn)
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52 {
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53 scpn_screeninfo_t *scrinfo;
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54 int bpp;
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55
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56 /* Check if current SB3 mode is usable, i.e. 8 or 16bpp */
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57 scrinfo = cookie_scpn->screen_info;
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58 bpp = 1 << (SDL_XBIOS_scpn_planes_device[scrinfo->device]);
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59
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60 if ((bpp == 8) || (bpp == 16)) {
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61 return 1;
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62 }
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63
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64 return 0;
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65 }
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66
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67 void
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68 SDL_XBIOS_SB3Init(_THIS, scpn_cookie_t * cookie_scpn)
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69 {
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70 scpn_screeninfo_t *scrinfo;
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71
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72 /* SB3 prevent changing video modes, we can only use current one */
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73 if (XBIOS_modelist) {
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74 SDL_free(XBIOS_modelist);
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75 XBIOS_nummodes = 0;
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76 XBIOS_modelist = NULL;
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77 }
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78
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79 scrinfo = cookie_scpn->screen_info;
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80 scrinfo->h_pos = scrinfo->v_pos = 0;
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81
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82 SDL_XBIOS_AddMode(this,
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83 -1,
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84 scrinfo->virtual_width, scrinfo->virtual_height,
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85 1 << (SDL_XBIOS_scpn_planes_device[scrinfo->device]),
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86 SDL_FALSE);
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87 }
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88
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89 /* vi: set ts=4 sw=4 expandtab: */