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#include "libultra_internal.h"
#include "hardware.h"
extern OSViContext* __osViNext;
extern OSViContext* __osViCurr;
void __osViSwapContext() {
register OSViMode* s0;
register OSViContext* s1;
u32 origin;
u32 hStart;
u32 sp34;
u32 field;
register u32 s2;
field = 0;
s1 = __osViNext;
s0 = s1->modep;
field = HW_REG(VI_V_CURRENT_LINE_REG, u32) & 1;
s2 = osVirtualToPhysical(s1->buffer);
origin = (s0->fldRegs[field].origin) + s2;
if (s1->state & 2) {
s1->x.scale |= s0->comRegs.xScale & ~0xfff;
} else {
s1->x.scale = s0->comRegs.xScale;
}
if (s1->unk00 & 4) {
sp34 = (u32) (s0->fldRegs[field].yScale & 0xfff);
s1->unk2c = s1->unk24 * sp34;
s1->unk2c |= s0->fldRegs[field].yScale & ~0xfff;
} else {
s1->y.scale = s0->fldRegs[field].yScale;
}
hStart = s0->comRegs.hStart;
if (s1->state & 0x20) {
hStart = 0;
}
if (s1->state & 0x40) {
s1->y.scale = 0;
origin = osVirtualToPhysical(s1->buffer);
}
if (s1->state & 0x80) {
s1->y.scale = (s1->y.offset << 0x10) & 0x3ff0000;
origin = osVirtualToPhysical(s1->buffer);
}
HW_REG(VI_ORIGIN_REG, u32) = origin;
HW_REG(VI_WIDTH_REG, u32) = s0->comRegs.width;
HW_REG(VI_BURST_REG, u32) = s0->comRegs.burst;
HW_REG(VI_V_SYNC_REG, u32) = s0->comRegs.vSync;
HW_REG(VI_H_SYNC_REG, u32) = s0->comRegs.hSync;
HW_REG(VI_LEAP_REG, u32) = s0->comRegs.leap;
HW_REG(VI_H_START_REG, u32) = hStart;
HW_REG(VI_V_START_REG, u32) = s0->fldRegs[field].vStart;
HW_REG(VI_V_BURST_REG, u32) = s0->fldRegs[field].vBurst;
HW_REG(VI_INTR_REG, u32) = s0->fldRegs[field].vIntr;
HW_REG(VI_X_SCALE_REG, u32) = s1->x.scale;
HW_REG(VI_Y_SCALE_REG, u32) = s1->y.scale;
HW_REG(VI_CONTROL_REG, u32) = s1->features;
__osViNext = __osViCurr;
__osViCurr = s1;
*__osViNext = *__osViCurr;
}
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