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#ifndef __STDVGA_H
#define __STDVGA_H
#include "types.h" // u8
// VGA registers
#define VGAREG_ACTL_ADDRESS 0x3c0
#define VGAREG_ACTL_WRITE_DATA 0x3c0
#define VGAREG_ACTL_READ_DATA 0x3c1
#define VGAREG_INPUT_STATUS 0x3c2
#define VGAREG_WRITE_MISC_OUTPUT 0x3c2
#define VGAREG_VIDEO_ENABLE 0x3c3
#define VGAREG_SEQU_ADDRESS 0x3c4
#define VGAREG_SEQU_DATA 0x3c5
#define VGAREG_PEL_MASK 0x3c6
#define VGAREG_DAC_STATE 0x3c7
#define VGAREG_DAC_READ_ADDRESS 0x3c7
#define VGAREG_DAC_WRITE_ADDRESS 0x3c8
#define VGAREG_DAC_DATA 0x3c9
#define VGAREG_READ_FEATURE_CTL 0x3ca
#define VGAREG_READ_MISC_OUTPUT 0x3cc
#define VGAREG_GRDC_ADDRESS 0x3ce
#define VGAREG_GRDC_DATA 0x3cf
#define VGAREG_MDA_CRTC_ADDRESS 0x3b4
#define VGAREG_MDA_CRTC_DATA 0x3b5
#define VGAREG_VGA_CRTC_ADDRESS 0x3d4
#define VGAREG_VGA_CRTC_DATA 0x3d5
#define VGAREG_MDA_WRITE_FEATURE_CTL 0x3ba
#define VGAREG_VGA_WRITE_FEATURE_CTL 0x3da
#define VGAREG_ACTL_RESET 0x3da
#define VGAREG_MDA_MODECTL 0x3b8
#define VGAREG_CGA_MODECTL 0x3d8
#define VGAREG_CGA_PALETTE 0x3d9
/* Video memory */
#define SEG_GRAPH 0xA000
#define SEG_CTEXT 0xB800
#define SEG_MTEXT 0xB000
/*
* Tables of default values for each mode
*/
#define TEXT 0x80
#define CTEXT (0x00 | TEXT)
#define MTEXT (0x01 | TEXT)
#define CGA 0x02
#define PLANAR1 0x03
#define PLANAR4 0x04
#define LINEAR8 0x05
// for SVGA
#define LINEAR15 0x10
#define LINEAR16 0x11
#define LINEAR24 0x12
#define LINEAR32 0x13
struct vgamode_s {
u8 svgamode;
u8 memmodel; /* CTEXT,MTEXT,CGA,PL1,PL2,PL4,P8,P15,P16,P24,P32 */
u8 twidth;
u8 theight;
u8 cheight;
u8 pixbits;
u16 sstart;
u16 slength;
u8 pelmask;
u8 *dac;
u16 dacsize;
u8 *sequ_regs;
u8 miscreg;
u8 *crtc_regs;
u8 *actl_regs;
u8 *grdc_regs;
};
struct saveVideoHardware {
u8 sequ_index;
u8 crtc_index;
u8 grdc_index;
u8 actl_index;
u8 feature;
u8 sequ_regs[4];
u8 sequ0;
u8 crtc_regs[25];
u8 actl_regs[20];
u8 grdc_regs[9];
u16 crtc_addr;
u8 plane_latch[4];
};
struct saveDACcolors {
u8 rwmode;
u8 peladdr;
u8 pelmask;
u8 dac[768];
u8 color_select;
};
void stdvga_screen_disable(void);
void stdvga_screen_enable(void);
void stdvga_set_border_color(u8 color);
void stdvga_set_overscan_border_color(u8 color);
u8 stdvga_get_overscan_border_color(void);
void stdvga_set_palette(u8 palid);
void stdvga_set_single_palette_reg(u8 reg, u8 val);
u8 stdvga_get_single_palette_reg(u8 reg);
void stdvga_set_all_palette_reg(u16 seg, u8 *data_far);
void stdvga_get_all_palette_reg(u16 seg, u8 *data_far);
void stdvga_toggle_intensity(u8 flag);
void stdvga_select_video_dac_color_page(u8 flag, u8 data);
void stdvga_read_video_dac_state(u8 *pmode, u8 *curpage);
void stdvga_set_dac_regs(u16 seg, u8 *data_far, u8 start, int count);
void stdvga_get_dac_regs(u16 seg, u8 *data_far, u8 start, int count);
void stdvga_set_pel_mask(u8 val);
u8 stdvga_get_pel_mask(void);
void stdvga_save_dac_state(u16 seg, struct saveDACcolors *info);
void stdvga_restore_dac_state(u16 seg, struct saveDACcolors *info);
void stdvga_sequ_write(u8 index, u8 value);
void stdvga_grdc_write(u8 index, u8 value);
void stdvga_set_text_block_specifier(u8 spec);
void stdvga_load_font(u16 seg, void *src_far, u16 count
, u16 start, u8 destflags, u8 fontsize);
u16 stdvga_get_crtc(void);
void stdvga_set_cursor_shape(u8 start, u8 end);
void stdvga_set_active_page(u16 address);
void stdvga_set_cursor_pos(u16 address);
void stdvga_set_scan_lines(u8 lines);
u16 stdvga_get_vde(void);
void stdvga_save_state(u16 seg, struct saveVideoHardware *info);
void stdvga_restore_state(u16 seg, struct saveVideoHardware *info);
void stdvga_set_mode(struct vgamode_s *vmode_g);
void stdvga_enable_video_addressing(u8 disable);
void stdvga_init(void);
#endif // stdvga.h
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