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