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annotate src/video/xbios/SDL_xbios_sb3.c @ 2079:1ed2155b7ee4

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From: Torsten Giebl Subject: ALLOCA Patch for SDL-1.2 Newsgroups: gmane.comp.lib.sdl Date: 2006-10-24 00:31:16 GMT Hello ! As alloca.h is not available on CYGWIN and MinGW32 it should not be checked there or it should be checked with -mno-cygwin using. I am a total configure.in newbie, but i found the way that things are handled in configure.in pretty bad for the case CYGWIN with MinGW Mode or not. Maybe this is not possible but i would like to have a way to detect at the start for example CYGWIN and then add. ask if configure was called with --enable-cygwin for example. --enable-cygwin should be optional and disabled by default as we want to have MinGW Mode by default. Only if the user wants it he should be able to use it. Then the whole configure.in would get add. questions okay the system is CYGWIN with or without MinGW Mode. The alloca.h thing for example is only available under CYGWIN ( without MinGW Mode ). CU
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 01 Dec 2006 20:25:03 +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: */