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1 /*
2     SDL - Simple DirectMedia Layer
3     Copyright (C) 1997-2012 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 /* Hidden structure -> variables names */
90 #define SDL_nummodes		(this->hidden->SDL_nummodes)
91 #define SDL_modelist		(this->hidden->SDL_modelist)
92 #define SDL_xbiosmode		(this->hidden->SDL_xbiosmode)
93 #define XBIOS_mutex		    (this->hidden->mutex)
94 #define XBIOS_cvdo		    (this->hidden->cookie_vdo)
95 #define XBIOS_oldpalette	(this->hidden->old_palette)
96 #define XBIOS_oldnumcol		(this->hidden->old_num_colors)
97 #define XBIOS_oldvbase		(this->hidden->old_video_base)
98 #define XBIOS_oldvmode		(this->hidden->old_video_mode)
99 #define XBIOS_screens		(this->hidden->screens)
100 #define XBIOS_screensmem	(this->hidden->screensmem)
101 #define XBIOS_shadowscreen	(this->hidden->shadowscreen)
102 #define XBIOS_fbnum			(this->hidden->frame_number)
103 #define XBIOS_pitch			(this->hidden->pitch)
104 #define XBIOS_centscreen	(this->hidden->centscreen)
105 #define XBIOS_current		(this->hidden->current)
106 
107 /*--- Functions prototypes ---*/
108 
109 void SDL_XBIOS_AddMode(_THIS, int actually_add, const xbiosmode_t *modeinfo);
110 
111 #endif /* _SDL_xbios_h */
112