| 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 Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 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 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | #ifndef _SDL_xbios_h |
| 25 | #define _SDL_xbios_h |
| 26 | |
| 27 | #include "SDL_stdinc.h" |
| 28 | #include "../SDL_sysvideo.h" |
| 29 | |
| 30 | /* Hidden "this" pointer for the video functions */ |
| 31 | #define _THIS SDL_VideoDevice *this |
| 32 | |
| 33 | #define XBIOSMODE_DOUBLELINE (1<<0) |
| 34 | #define XBIOSMODE_C2P (1<<1) |
| 35 | |
| 36 | typedef struct |
| 37 | { |
| 38 | Uint16 number; /* Video mode number */ |
| 39 | Uint16 width; /* Size */ |
| 40 | Uint16 height; |
| 41 | Uint16 depth; /* bits per plane */ |
| 42 | Uint16 flags; |
| 43 | } xbiosmode_t; |
| 44 | |
| 45 | /* Private display data */ |
| 46 | #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */ |
| 47 | |
| 48 | struct SDL_PrivateVideoData { |
| 49 | long cookie_vdo; |
| 50 | long old_video_mode; /* Old video mode before entering SDL */ |
| 51 | void *old_video_base; /* Old pointer to screen buffer */ |
| 52 | void *old_palette; /* Old palette */ |
| 53 | Uint32 old_num_colors; /* Nb of colors in saved palette */ |
| 54 | |
| 55 | void *screens[2]; /* Pointers to aligned screen buffer */ |
| 56 | void *screensmem[2]; /* Pointers to screen buffer */ |
| 57 | void *shadowscreen; /* Shadow screen for c2p conversion */ |
| 58 | int frame_number; /* Number of frame for double buffer */ |
| 59 | int pitch; /* Destination line width for C2P */ |
| 60 | |
| 61 | SDL_bool centscreen; /* Centscreen extension present ? */ |
| 62 | |
| 63 | xbiosmode_t *current; /* Current set mode */ |
| 64 | int SDL_nummodes[NUM_MODELISTS]; |
| 65 | SDL_Rect **SDL_modelist[NUM_MODELISTS]; |
| 66 | xbiosmode_t **SDL_xbiosmode[NUM_MODELISTS]; |
| 67 | }; |
| 68 | |
| 69 | /* _VDO cookie values */ |
| 70 | enum { |
| 71 | VDO_ST=0, |
| 72 | VDO_STE, |
| 73 | VDO_TT, |
| 74 | VDO_F30, |
| 75 | VDO_MILAN |
| 76 | }; |
| 77 | |
| 78 | /* Monitor types */ |
| 79 | enum { |
| 80 | MONITOR_MONO=0, |
| 81 | MONITOR_TV, |
| 82 | MONITOR_VGA, |
| 83 | MONITOR_RGB |
| 84 | }; |
| 85 | |
| 86 | /* EgetShift masks */ |
| 87 | #define ES_MODE 0x0700 |
| 88 | |
| 89 | /* TT shifter modes */ |
| 90 | #ifndef ST_LOW |
| 91 | #define ST_LOW 0x0000 |
| 92 | #define ST_MED 0x0100 |
| 93 | #define ST_HIGH 0x0200 |
| 94 | #define TT_LOW 0x0700 |
| 95 | #define TT_MED 0x0300 |
| 96 | #define TT_HIGH 0x0600 |
| 97 | #endif |
| 98 | |
| 99 | /* Hidden structure -> variables names */ |
| 100 | #define SDL_nummodes (this->hidden->SDL_nummodes) |
| 101 | #define SDL_modelist (this->hidden->SDL_modelist) |
| 102 | #define SDL_xbiosmode (this->hidden->SDL_xbiosmode) |
| 103 | #define XBIOS_mutex (this->hidden->mutex) |
| 104 | #define XBIOS_cvdo (this->hidden->cookie_vdo) |
| 105 | #define XBIOS_oldpalette (this->hidden->old_palette) |
| 106 | #define XBIOS_oldnumcol (this->hidden->old_num_colors) |
| 107 | #define XBIOS_oldvbase (this->hidden->old_video_base) |
| 108 | #define XBIOS_oldvmode (this->hidden->old_video_mode) |
| 109 | #define XBIOS_screens (this->hidden->screens) |
| 110 | #define XBIOS_screensmem (this->hidden->screensmem) |
| 111 | #define XBIOS_shadowscreen (this->hidden->shadowscreen) |
| 112 | #define XBIOS_fbnum (this->hidden->frame_number) |
| 113 | #define XBIOS_pitch (this->hidden->pitch) |
| 114 | #define XBIOS_centscreen (this->hidden->centscreen) |
| 115 | #define XBIOS_current (this->hidden->current) |
| 116 | |
| 117 | /*--- Functions prototypes ---*/ |
| 118 | |
| 119 | void SDL_XBIOS_AddMode(_THIS, int actually_add, const xbiosmode_t *modeinfo); |
| 120 | |
| 121 | #endif /* _SDL_xbios_h */ |