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DS GX: Implement POS test

This commit is contained in:
Vicki Pfau 2021-07-30 14:26:13 -07:00
parent 7f151e64a7
commit 858c9faedc
3 changed files with 40 additions and 4 deletions
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1
CHANGES
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@ -2,6 +2,7 @@ medusa alpha 3 (Future)
Features:
- DS GX: Toon shading
- DS GX: Clear depth
- DS GX: Position test
Bugfixes:
- DS GX: Fix vertex texture transformation (fixes mgba.io/i/702)
- DS GX: Automatically normalize winding culling calculations (fixes mgba.io/i/699)

35
src/ds/gx.c
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@ -485,10 +485,7 @@ static int16_t _dot3(int32_t x0, int32_t y0, int32_t z0, int32_t x1, int32_t y1,
return a;
}
static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
if (gx->vertexMode < 0 || gx->vertexIndex == DS_GX_VERTEX_BUFFER_SIZE || gx->polygonIndex == DS_GX_POLYGON_BUFFER_SIZE) {
return;
}
static void _posTest(struct DSGX* gx, int16_t x, int16_t y, int16_t z) {
gx->currentVertex.coord[0] = x;
gx->currentVertex.coord[1] = y;
gx->currentVertex.coord[2] = z;
@ -496,6 +493,13 @@ static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
gx->currentVertex.viewCoord[1] = _dotViewport(&gx->currentVertex, &gx->clipMatrix.m[1]);
gx->currentVertex.viewCoord[2] = _dotViewport(&gx->currentVertex, &gx->clipMatrix.m[2]);
gx->currentVertex.viewCoord[3] = _dotViewport(&gx->currentVertex, &gx->clipMatrix.m[3]);
}
static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
if (gx->vertexMode < 0 || gx->vertexIndex == DS_GX_VERTEX_BUFFER_SIZE || gx->polygonIndex == DS_GX_POLYGON_BUFFER_SIZE) {
return;
}
_posTest(gx, x, y, z);
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) == 0) {
gx->currentVertex.vs = gx->currentVertex.st[0];
@ -1244,6 +1248,25 @@ static void _fifoRun(struct mTiming* timing, void* context, uint32_t cyclesLate)
gxstat = DSRegGXSTATClearTestBusy(gxstat);
gxstat = DSRegGXSTATTestFillBoxTestResult(gxstat, _boxTest(gx));
break;
case DS_GX_CMD_POS_TEST: {
int16_t x = gx->activeEntries[0].params[0];
x |= gx->activeEntries[0].params[1] << 8;
int16_t y = gx->activeEntries[0].params[2];
y |= gx->activeEntries[0].params[3] << 8;
int16_t z = gx->activeEntries[1].params[0];
z |= gx->activeEntries[1].params[1] << 8;
_posTest(gx, x, y, z);
gx->p->memory.io9[DS9_REG_POS_RESULT_0 >> 1] = gx->currentVertex.viewCoord[0] & 0xFFFF;
gx->p->memory.io9[DS9_REG_POS_RESULT_1 >> 1] = gx->currentVertex.viewCoord[0] >> 16;
gx->p->memory.io9[DS9_REG_POS_RESULT_2 >> 1] = gx->currentVertex.viewCoord[1] & 0xFFFF;
gx->p->memory.io9[DS9_REG_POS_RESULT_3 >> 1] = gx->currentVertex.viewCoord[1] >> 16;
gx->p->memory.io9[DS9_REG_POS_RESULT_4 >> 1] = gx->currentVertex.viewCoord[2] & 0xFFFF;
gx->p->memory.io9[DS9_REG_POS_RESULT_5 >> 1] = gx->currentVertex.viewCoord[2] >> 16;
gx->p->memory.io9[DS9_REG_POS_RESULT_6 >> 1] = gx->currentVertex.viewCoord[3] & 0xFFFF;
gx->p->memory.io9[DS9_REG_POS_RESULT_7 >> 1] = gx->currentVertex.viewCoord[3] >> 16;
gxstat = DSRegGXSTATClearTestBusy(gxstat);
break;
}
default:
mLOG(DS_GX, STUB, "Unimplemented GX command %02X:%02X %02X %02X %02X", entry.command, entry.params[0], entry.params[1], entry.params[2], entry.params[3]);
break;
@ -1469,6 +1492,10 @@ static void DSGXWriteFIFO(struct DSGX* gx, struct DSGXEntry entry) {
gxstat = DSRegGXSTATFillTestBusy(gxstat);
gxstat = DSRegGXSTATClearBoxTestResult(gxstat);
gx->p->memory.io9[DS9_REG_GXSTAT_LO >> 1] = gxstat;
} else if (entry.command == DS_GX_CMD_POS_TEST) {
DSRegGXSTAT gxstat = gx->p->memory.io9[DS9_REG_GXSTAT_LO >> 1];
gxstat = DSRegGXSTATFillTestBusy(gxstat);
gx->p->memory.io9[DS9_REG_GXSTAT_LO >> 1] = gxstat;
}
if (!gx->swapBuffers && !mTimingIsScheduled(&gx->p->ds9.timing, &gx->fifoEvent)) {
mTimingSchedule(&gx->p->ds9.timing, &gx->fifoEvent, cycles);

8
src/ds/io.c
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@ -856,6 +856,14 @@ uint16_t DS9IORead(struct DS* ds, uint32_t address) {
case DS9_REG_TOON_TABLE_1F:
case DS9_REG_GXSTAT_LO:
case DS9_REG_GXSTAT_HI:
case DS9_REG_POS_RESULT_0:
case DS9_REG_POS_RESULT_1:
case DS9_REG_POS_RESULT_2:
case DS9_REG_POS_RESULT_3:
case DS9_REG_POS_RESULT_4:
case DS9_REG_POS_RESULT_5:
case DS9_REG_POS_RESULT_6:
case DS9_REG_POS_RESULT_7:
case DS9_REG_CLIPMTX_RESULT_00:
case DS9_REG_CLIPMTX_RESULT_01:
case DS9_REG_CLIPMTX_RESULT_02: