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DS GX: Partially fix depth, but disable perspective correction for now

This commit is contained in:
Vicki Pfau 2017-03-02 13:13:56 -08:00
parent 58381cf00f
commit 00dd9090e6
3 changed files with 33 additions and 21 deletions
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2
include/mgba/internal/ds/gx/software.h
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@ -50,7 +50,7 @@ struct DSGXSoftwareEdge {
struct DSGXSoftwareEndpoint {
int32_t x; // 20.12
int32_t w; // 20.12
int64_t w;
uint8_t cr;
uint8_t cg;
uint8_t cb;

2
src/ds/gx.c
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@ -249,7 +249,7 @@ static void _emitVertex(struct DSGX* gx, uint16_t x, uint16_t y, uint16_t z) {
gx->currentVertex.vx = (gx->currentVertex.vx + gx->currentVertex.vw) * (int64_t) (gx->viewportWidth << 12) / (gx->currentVertex.vw * 2) + (gx->viewportX1 << 12);
gx->currentVertex.vy = (gx->currentVertex.vy + gx->currentVertex.vw) * (int64_t) (gx->viewportHeight << 12) / (gx->currentVertex.vw * 2) + (gx->viewportY1 << 12);
gx->currentVertex.vw = 0x40000000 / gx->currentVertex.vw;
//gx->currentVertex.vw = 0x40000000 / gx->currentVertex.vw;
if (DSGXTexParamsGetCoordTfMode(gx->currentPoly.texParams) > 0) {
int32_t m12 = gx->texMatrix.m[12];

50
src/ds/gx/software.c
View File

@ -146,22 +146,30 @@ static bool _edgeToSpan(struct DSGXSoftwareSpan* span, const struct DSGXSoftware
} else if (yw > height) {
yw = height;
}
int64_t heightRecip = 0x100000000LL / height;
span->ep[index].x = ((((int64_t) (edge->x1 - edge->x0) * yw) * heightRecip) >> 32) + edge->x0;
yw *= 0x100000000LL / height;
span->ep[index].x = (((int64_t) (edge->x1 - edge->x0) * yw) >> 32) + edge->x0;
if (index && span->ep[0].x > span->ep[index].x) {
int32_t temp = span->ep[index].x;
span->ep[index] = span->ep[0];
span->ep[0].x = temp;
index = 0;
}
int32_t w = ((((int64_t) (edge->w1 - edge->w0) * yw) * heightRecip) >> 32) + edge->w0;
int64_t wRecip = 0x1000000000000LL / w;
int32_t w0 = edge->w0;
int32_t w1 = edge->w1;
int32_t w = (((int64_t) (edge->w1 - edge->w0) * yw) >> 32) + edge->w0;
int64_t wRecip;// = 0x1000000000000LL / w;
// XXX: Disable perspective correction until I figure out how to fix it
wRecip = 0x100000000;
w0 = 0x10000;
w1 = 0x10000;
span->ep[index].w = w;
span->ep[index].cr = ((((((int32_t) (edge->cr1 * edge->w1 - edge->cr0 * edge->w0) * yw) * heightRecip) >> 32) + edge->cr0 * edge->w0) * wRecip) >> 48;
span->ep[index].cg = ((((((int32_t) (edge->cg1 * edge->w1 - edge->cg0 * edge->w0) * yw) * heightRecip) >> 32) + edge->cg0 * edge->w0) * wRecip) >> 48;
span->ep[index].cb = ((((((int32_t) (edge->cb1 * edge->w1 - edge->cb0 * edge->w0) * yw) * heightRecip) >> 32) + edge->cb0 * edge->w0) * wRecip) >> 48;
span->ep[index].s = ((((((int32_t) (edge->s1 * edge->w1 - edge->s0 * edge->w0) * yw) * heightRecip) >> 32) + edge->s0 * edge->w0) * wRecip) >> 48;
span->ep[index].t = ((((((int32_t) (edge->t1 * edge->w1 - edge->t0 * edge->w0) * yw) * heightRecip) >> 32) + edge->t0 * edge->w0) * wRecip) >> 48;
span->ep[index].cr = (((((edge->cr1 * (int64_t) w1 - edge->cr0 * (int64_t) w0) * yw) >> 32) + edge->cr0 * (int64_t) w0) * wRecip) >> 48;
span->ep[index].cg = (((((edge->cg1 * (int64_t) w1 - edge->cg0 * (int64_t) w0) * yw) >> 32) + edge->cg0 * (int64_t) w0) * wRecip) >> 48;
span->ep[index].cb = (((((edge->cb1 * (int64_t) w1 - edge->cb0 * (int64_t) w0) * yw) >> 32) + edge->cb0 * (int64_t) w0) * wRecip) >> 48;
span->ep[index].s = (((((edge->s1 * (int64_t) w1 - edge->s0 * (int64_t) w0) * yw) >> 32) + edge->s0 * (int64_t) w0) * wRecip) >> 48;
span->ep[index].t = (((((edge->t1 * (int64_t) w1 - edge->t0 * (int64_t) w0) * yw) >> 32) + edge->t0 * (int64_t) w0) * wRecip) >> 48;
return true;
}
@ -198,22 +206,26 @@ static void _lerpEndpoint(const struct DSGXSoftwareSpan* span, struct DSGXSoftwa
} else if (xw > width) {
xw = width;
}
xw *= 0x100000000LL / width;
int32_t w0 = span->ep[0].w;
int32_t w1 = span->ep[1].w;
int64_t widthRecip = 0x100000000LL / width;
int32_t w = ((((int64_t) (w1 - w0) * xw) * widthRecip) >> 32) + w0;
int64_t w = (((int64_t) (w1 - w0) * xw) >> 32) + w0;
int64_t wRecip;// = 0x1000000000000LL / w;
ep->w = w;
int64_t wRecip = 0x1000000000000LL / w;
// XXX: Disable perspective correction until I figure out how to fix it
wRecip = 0x100000000;
w0 = 0x10000;
w1 = 0x10000;
uint64_t r = ((((span->ep[1].cr * (int64_t) w1 - span->ep[0].cr * (int64_t) w0) * xw) * widthRecip) >> 32) + span->ep[0].cr * (int64_t) w0;
uint64_t g = ((((span->ep[1].cg * (int64_t) w1 - span->ep[0].cg * (int64_t) w0) * xw) * widthRecip) >> 32) + span->ep[0].cg * (int64_t) w0;
uint64_t b = ((((span->ep[1].cb * (int64_t) w1 - span->ep[0].cb * (int64_t) w0) * xw) * widthRecip) >> 32) + span->ep[0].cb * (int64_t) w0;
uint64_t r = (((span->ep[1].cr * (int64_t) w1 - span->ep[0].cr * (int64_t) w0) * xw) >> 32) + span->ep[0].cr * (int64_t) w0;
uint64_t g = (((span->ep[1].cg * (int64_t) w1 - span->ep[0].cg * (int64_t) w0) * xw) >> 32) + span->ep[0].cg * (int64_t) w0;
uint64_t b = (((span->ep[1].cb * (int64_t) w1 - span->ep[0].cb * (int64_t) w0) * xw) >> 32) + span->ep[0].cb * (int64_t) w0;
ep->cr = (r * wRecip) >> 48;
ep->cg = (g * wRecip) >> 48;
ep->cb = (b * wRecip) >> 48;
int32_t s = ((((span->ep[1].s * (int64_t) w1 - span->ep[0].s * (int64_t) w0) * xw) * widthRecip) >> 32) + span->ep[0].s * (int64_t) w0;
int32_t t = ((((span->ep[1].t * (int64_t) w1 - span->ep[0].t * (int64_t) w0) * xw) * widthRecip) >> 32) + span->ep[0].t * (int64_t) w0;
int32_t s = (((span->ep[1].s * (int64_t) w1 - span->ep[0].s * (int64_t) w0) * xw) >> 32) + span->ep[0].s * (int64_t) w0;
int32_t t = (((span->ep[1].t * (int64_t) w1 - span->ep[0].t * (int64_t) w0) * xw) >> 32) + span->ep[0].t * (int64_t) w0;
ep->s = (s * wRecip) >> 48;
ep->t = (t * wRecip) >> 48;
}
@ -410,7 +422,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
for (i = 0; i < DS_VIDEO_HORIZONTAL_PIXELS; ++i) {
struct DSGXSoftwareSpan* span = NULL;
struct DSGXSoftwareEndpoint ep;
int32_t depth = INT32_MIN;
int32_t depth = INT32_MAX;
scanline[i] = FLAG_UNWRITTEN;
if (i >= nextSpanX) {
size_t nextSpanId = DSGXSoftwareSpanListSize(&softwareRenderer->activeSpans);
@ -433,7 +445,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
if (scanline[i] == FLAG_UNWRITTEN) {
scanline[i] = color;
}
if (ep.w >= depth && color != FLAG_UNWRITTEN) {
if (ep.w < depth && color != FLAG_UNWRITTEN) {
depth = ep.w;
scanline[i] = color;
}