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#include "PR/os_internal.h"
#include "PR/rcp.h"
#include "PRinternal/viint.h"
// TODO: this comes from a header
#ident "$Revision: 1.17 $"
void __osViSwapContext(void) {
register OSViMode* vm;
register __OSViContext* vc;
u32 origin;
u32 hStart;
#if BUILD_VERSION >= VERSION_J
u32 vStart;
#endif
u32 nomValue;
u32 field;
field = 0;
vc = __osViNext;
vm = vc->modep;
field = IO_READ(VI_CURRENT_REG) & 1; // field num
origin = osVirtualToPhysical(vc->framep) + (vm->fldRegs[field].origin);
if (vc->state & VI_STATE_XSCALE_UPDATED) {
vc->x.scale |= (vm->comRegs.xScale & ~VI_SCALE_MASK);
} else {
vc->x.scale = vm->comRegs.xScale;
}
if (vc->state & VI_STATE_YSCALE_UPDATED) {
nomValue = vm->fldRegs[field].yScale & VI_SCALE_MASK;
vc->y.scale = vc->y.factor * nomValue;
vc->y.scale |= vm->fldRegs[field].yScale & ~VI_SCALE_MASK;
} else {
vc->y.scale = vm->fldRegs[field].yScale;
}
#if BUILD_VERSION >= VERSION_J
vStart = (vm->fldRegs[field].vStart - (__additional_scanline << VI_SUBPIXEL_SH)) + __additional_scanline;
#endif
hStart = vm->comRegs.hStart;
if (vc->state & VI_STATE_BLACK) {
hStart = 0;
}
if (vc->state & VI_STATE_REPEATLINE) {
vc->y.scale = 0;
origin = osVirtualToPhysical(vc->framep);
}
if (vc->state & VI_STATE_FADE) {
vc->y.scale = (vc->y.offset << VI_SUBPIXEL_SH) & (VI_2_10_FPART_MASK << VI_SUBPIXEL_SH);
origin = osVirtualToPhysical(vc->framep);
}
IO_WRITE(VI_ORIGIN_REG, origin);
IO_WRITE(VI_WIDTH_REG, vm->comRegs.width);
IO_WRITE(VI_BURST_REG, vm->comRegs.burst);
IO_WRITE(VI_V_SYNC_REG, vm->comRegs.vSync);
IO_WRITE(VI_H_SYNC_REG, vm->comRegs.hSync);
IO_WRITE(VI_LEAP_REG, vm->comRegs.leap);
IO_WRITE(VI_H_START_REG, hStart);
#if BUILD_VERSION >= VERSION_J
IO_WRITE(VI_V_START_REG, vStart);
#else
IO_WRITE(VI_V_START_REG, vm->fldRegs[field].vStart);
#endif
IO_WRITE(VI_V_BURST_REG, vm->fldRegs[field].vBurst);
IO_WRITE(VI_INTR_REG, vm->fldRegs[field].vIntr);
IO_WRITE(VI_X_SCALE_REG, vc->x.scale);
IO_WRITE(VI_Y_SCALE_REG, vc->y.scale);
IO_WRITE(VI_CONTROL_REG, vc->control);
__osViNext = __osViCurr;
__osViCurr = vc;
*__osViNext = *__osViCurr;
}
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