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annotate src/video/xbios/SDL_xbios.h @ 4194:05c9e942cc46 SDL-1.2

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Preliminary work to support the Milan video bios, that will gives access to 24 or 32 bpp modes. I used the svga driver as model to dynamically build video modes list.
author Patrice Mandin <patmandin@gmail.com>
date Sat, 19 Sep 2009 12:46:00 +0000
parents a1b03ba2fcd0
children 13de8ea401db
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 #ifndef _SDL_xbios_h
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25 #define _SDL_xbios_h
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26
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27 #include "SDL_stdinc.h"
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28 #include "../SDL_sysvideo.h"
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29
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30 /* Hidden "this" pointer for the video functions */
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31 #define _THIS SDL_VideoDevice *this
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32
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33 typedef struct
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34 {
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35 Uint16 number; /* Video mode number */
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36 Uint16 width; /* Size */
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37 Uint16 height;
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38 Uint16 depth; /* bits per plane */
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39 SDL_bool doubleline; /* Double the lines ? */
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40 } xbiosmode_t;
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41
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42 /* Private display data */
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43 #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */
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44
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45 struct SDL_PrivateVideoData {
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46 long cookie_vdo;
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47 int old_video_mode; /* Old video mode before entering SDL */
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48 void *old_video_base; /* Old pointer to screen buffer */
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49 void *old_palette; /* Old palette */
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50 Uint32 old_num_colors; /* Nb of colors in saved palette */
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51
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52 void *screens[2]; /* Pointers to aligned screen buffer */
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53 void *screensmem[2]; /* Pointers to screen buffer */
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54 void *shadowscreen; /* Shadow screen for c2p conversion */
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55 int doubleline; /* Double line mode ? */
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56 int frame_number; /* Number of frame for double buffer */
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57 int pitch; /* Destination line width for C2P */
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58 int width, height; /* Screen size for centered C2P */
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59
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60 SDL_bool centscreen; /* Centscreen extension present ? */
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61
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62 int SDL_nummodes[NUM_MODELISTS];
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63 SDL_Rect **SDL_modelist[NUM_MODELISTS];
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64 xbiosmode_t **SDL_xbiosmode[NUM_MODELISTS];
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65 };
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66
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67 /* _VDO cookie values */
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68 enum {
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69 VDO_ST=0,
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70 VDO_STE,
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71 VDO_TT,
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72 VDO_F30
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73 };
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74
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75 /* Monitor types */
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76 enum {
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77 MONITOR_MONO=0,
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78 MONITOR_TV,
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79 MONITOR_VGA,
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80 MONITOR_RGB
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81 };
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82
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83 /* EgetShift masks */
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84 #define ES_MODE 0x0700
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85
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86 /* TT shifter modes */
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87 #ifndef ST_LOW
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88 #define ST_LOW 0x0000
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89 #define ST_MED 0x0100
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90 #define ST_HIGH 0x0200
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91 #define TT_LOW 0x0700
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92 #define TT_MED 0x0300
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93 #define TT_HIGH 0x0600
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94 #endif
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95
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96 /* Hidden structure -> variables names */
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97 #define SDL_nummodes (this->hidden->SDL_nummodes)
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98 #define SDL_modelist (this->hidden->SDL_modelist)
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99 #define SDL_xbiosmode (this->hidden->SDL_xbiosmode)
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100 #define XBIOS_mutex (this->hidden->mutex)
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101 #define XBIOS_cvdo (this->hidden->cookie_vdo)
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102 #define XBIOS_oldpalette (this->hidden->old_palette)
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103 #define XBIOS_oldnumcol (this->hidden->old_num_colors)
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104 #define XBIOS_oldvbase (this->hidden->old_video_base)
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105 #define XBIOS_oldvmode (this->hidden->old_video_mode)
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106 #define XBIOS_screens (this->hidden->screens)
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107 #define XBIOS_screensmem (this->hidden->screensmem)
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108 #define XBIOS_shadowscreen (this->hidden->shadowscreen)
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109 #define XBIOS_doubleline (this->hidden->doubleline)
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110 #define XBIOS_fbnum (this->hidden->frame_number)
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111 #define XBIOS_pitch (this->hidden->pitch)
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112 #define XBIOS_width (this->hidden->width)
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113 #define XBIOS_height (this->hidden->height)
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114 #define XBIOS_centscreen (this->hidden->centscreen)
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115
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116 /*--- Functions prototypes ---*/
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117
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118 void SDL_XBIOS_AddMode(_THIS, int actually_add, const xbiosmode_t *modeinfo);
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119
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120 #endif /* _SDL_xbios_h */