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#ifndef __VGABIOS_H
#define __VGABIOS_H
#include "types.h" // u8
#include "farptr.h" // struct segoff_s
#define SCREEN_IO_START(x,y,p) (((((x)*(y)) | 0x00ff) + 1) * (p))
#define SCREEN_MEM_START(x,y,p) SCREEN_IO_START(((x)*2),(y),(p))
struct saveBDAstate {
u8 video_mode;
u16 video_cols;
u16 video_pagesize;
u16 crtc_address;
u8 video_rows;
u16 char_height;
u8 video_ctl;
u8 video_switches;
u8 modeset_ctl;
u16 cursor_type;
u16 cursor_pos[8];
u16 video_pagestart;
u8 video_page;
/* current font */
struct segoff_s font0;
struct segoff_s font1;
};
// Mode flags
#define MF_GRAYSUM 0x0002
#define MF_NOPALETTE 0x0008
#define MF_CUSTOMCRTC 0x0800
#define MF_LINEARFB 0x4000
#define MF_NOCLEARMEM 0x8000
// vgatables.c
struct vgamode_s;
struct vgamode_s *find_vga_entry(u8 mode);
void build_video_param(void);
extern struct VideoSavePointer_s video_save_pointer_table;
extern u8 static_functionality[];
// vgafonts.c
extern u8 vgafont8[];
extern u8 vgafont14[];
extern u8 vgafont16[];
extern u8 vgafont14alt[];
extern u8 vgafont16alt[];
// vgabios.c
extern u16 VgaBDF;
#define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val))
struct carattr {
u8 car, attr, use_attr;
};
struct cursorpos {
u8 x, y, page;
};
void modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g);
// vgafb.c
void vgafb_scroll(int nblines, int attr
, struct cursorpos ul, struct cursorpos lr);
void vgafb_write_char(struct cursorpos cp, struct carattr ca);
struct carattr vgafb_read_char(struct cursorpos cp);
void vgafb_write_pixel(u8 color, u16 x, u16 y);
u8 vgafb_read_pixel(u16 x, u16 y);
// vbe.c
#define VBE_OEM_STRING "SeaBIOS VBE(C) 2011"
#define VBE_VENDOR_STRING "SeaBIOS Developers"
#define VBE_PRODUCT_STRING "SeaBIOS VBE Adapter"
#define VBE_REVISION_STRING "Rev. 1"
struct vbe_modeinfo
{
u16 width;
u16 height;
u8 depth;
u16 linesize;
u32 phys_base;
u32 vram_size;
};
struct bregs;
void handle_104f(struct bregs *regs);
#endif // vgabios.h
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