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#include "global.h"
void __osViSwapContext(void) {
register OSViMode* viMode;
register OSViContext* viNext;
u32 origin;
u32 hStart;
u32 vstart;
u32 sp34;
u32 field;
register u32 s2;
field = 0;
viNext = __osViNext;
viMode = viNext->modep;
field = HW_REG(VI_V_CURRENT_LINE_REG, u32) & 1;
s2 = osVirtualToPhysical(viNext->buffer);
origin = (viMode->fldRegs[field].origin) + s2;
if (viNext->state & 2) {
viNext->x.scale |= viMode->comRegs.xScale & ~0xFFF;
} else {
viNext->x.scale = viMode->comRegs.xScale;
}
if (viNext->state & 4) {
sp34 = (u32)(viMode->fldRegs[field].yScale & 0xFFF);
viNext->y.scale = viNext->y.factor * sp34;
viNext->y.scale |= viMode->fldRegs[field].yScale & ~0xFFF;
} else {
viNext->y.scale = viMode->fldRegs[field].yScale;
}
vstart = (viMode->fldRegs[field].vStart - (__additional_scanline << 0x10)) + __additional_scanline;
hStart = viMode->comRegs.hStart;
if (viNext->state & 0x20) {
hStart = 0;
}
if (viNext->state & 0x40) {
viNext->y.scale = 0;
origin = osVirtualToPhysical(viNext->buffer);
}
if (viNext->state & 0x80) {
viNext->y.scale = (viNext->y.offset << 0x10) & 0x3FF0000;
origin = osVirtualToPhysical(viNext->buffer);
}
HW_REG(VI_ORIGIN_REG, u32) = origin;
HW_REG(VI_WIDTH_REG, u32) = viMode->comRegs.width;
HW_REG(VI_BURST_REG, u32) = viMode->comRegs.burst;
HW_REG(VI_V_SYNC_REG, u32) = viMode->comRegs.vSync;
HW_REG(VI_H_SYNC_REG, u32) = viMode->comRegs.hSync;
HW_REG(VI_LEAP_REG, u32) = viMode->comRegs.leap;
HW_REG(VI_H_START_REG, u32) = hStart;
HW_REG(VI_V_START_REG, u32) = vstart;
HW_REG(VI_V_BURST_REG, u32) = viMode->fldRegs[field].vBurst;
HW_REG(VI_INTR_REG, u32) = viMode->fldRegs[field].vIntr;
HW_REG(VI_X_SCALE_REG, u32) = viNext->x.scale;
HW_REG(VI_Y_SCALE_REG, u32) = viNext->y.scale;
HW_REG(VI_CONTROL_REG, u32) = viNext->features;
__osViNext = __osViCurr;
__osViCurr = viNext;
*__osViNext = *__osViCurr;
}
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