#ifndef _VIINT_H
#define _VIINT_H
#include <ultra64.h>

#define OS_TV_TYPE_PAL 0
#define OS_TV_TYPE_NTSC 1
#define OS_TV_TYPE_MPAL 2

//TODO: figure out what this is
#define VI_STATE_01 0x01
#define VI_STATE_XSCALE_UPDATED 0x02
#define VI_STATE_YSCALE_UPDATED 0x04
#define VI_STATE_08 0x08         //related to control regs changing
#define VI_STATE_10 0x10         //swap buffer
#define VI_STATE_BLACK 0x20      //probably related to a black screen
#define VI_STATE_REPEATLINE 0x40 //repeat line?
#define VI_STATE_FADE 0x80       //fade

#define VI_CTRL_ANTIALIAS_MODE_3 0x00300 /* Bit [9:8] anti-alias mode */
#define VI_CTRL_ANTIALIAS_MODE_2 0x00200 /* Bit [9:8] anti-alias mode */
#define VI_CTRL_ANTIALIAS_MODE_1 0x00100 /* Bit [9:8] anti-alias mode */

#define VI_SCALE_MASK 0xfff //see rcp scale_x/scale_y
#define VI_2_10_FPART_MASK 0x3ff
#define VI_SUBPIXEL_SH 0x10

#define BURST(hsync_width, color_width, vsync_width, color_start) \
    (hsync_width | (color_width << 8) | (vsync_width << 16) | (color_start << 20))
#define WIDTH(v) v
#define VSYNC(v) v
#define HSYNC(duration, leap) (duration | (leap << 16))
#define LEAP(upper, lower) ((upper << 16) | lower)
#define START(start, end) ((start << 16) | end)

#define FTOFIX(val, i, f) ((u32)(val * (f32)(1 << f)) & ((1 << (i + f)) - 1))

#define F210(val) FTOFIX(val, 2, 10)
#define SCALE(scaleup, off) (F210((1.0f / (f32)scaleup)) | (F210((f32)off) << 16))

#define VCURRENT(v) v //seemingly unused
#define ORIGIN(v) v
#define VINTR(v) v
#define HSTART START

typedef struct
{
    /* 0x0 */ f32 factor;
    /* 0x4 */ u16 offset;
    /* 0x8 */ u32 scale;
} __OSViScale;

typedef struct
{
    /* 0x0 */ u16 state;
    /* 0x2 */ u16 retraceCount;
    /* 0x4 */ void *framep;
    /* 0x8 */ OSViMode *modep;
    /* 0xC */ u32 control;
    /* 0x10 */ OSMesgQueue *msgq;
    /* 0x14 */ OSMesg msg;
    /* 0x18 */ __OSViScale x;
    /* 0x24 */ __OSViScale y;
} __OSViContext;

void __osViSwapContext(void);
extern __OSViContext *__osViCurr;
extern __OSViContext *__osViNext;
__OSViContext *__osViGetCurrentContext(void);
void __osViInit(void);
#endif
