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DS GX: Improve alpha slightly

This commit is contained in:
Vicki Pfau 2017-03-04 21:50:58 -08:00
parent 4fecedb42a
commit 4bde13effb
2 changed files with 13 additions and 34 deletions
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1
include/mgba/internal/ds/gx.h
View File

@ -56,6 +56,7 @@ DECL_BITS(DSGXPolygonAttrs, Mode, 4, 2);
DECL_BIT(DSGXPolygonAttrs, FrontFace, 6); DECL_BIT(DSGXPolygonAttrs, FrontFace, 6);
DECL_BIT(DSGXPolygonAttrs, BackFace, 7); DECL_BIT(DSGXPolygonAttrs, BackFace, 7);
// TODO // TODO
DECL_BITS(DSGXPolygonAttrs, Alpha, 16, 5);
enum DSGXCommand { enum DSGXCommand {
DS_GX_CMD_NOP = 0, DS_GX_CMD_NOP = 0,

44
src/ds/gx/software.c
View File

@ -106,11 +106,11 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
} }
uint16_t texelCoord = s + t * poly->texW; uint16_t texelCoord = s + t * poly->texW;
uint8_t a = 0x1F; uint8_t a = DSGXPolygonAttrsGetAlpha(poly->poly->polyParams);
switch (poly->texFormat) { switch (poly->texFormat) {
case 0: case 0:
default: default:
return _finishColor(ep->cr, ep->cg, ep->cb, 0x1F); return _finishColor(ep->cr, ep->cg, ep->cb, a);
case 1: case 1:
texel = ((uint8_t*) poly->texBase)[texelCoord]; texel = ((uint8_t*) poly->texBase)[texelCoord];
a = (texel >> 5) & 0x7; a = (texel >> 5) & 0x7;
@ -164,26 +164,6 @@ static color_t _lookupColor(struct DSGXSoftwareEndpoint* ep, struct DSGXSoftware
} }
} }
static int _edgeSort(const void* a, const void* b) {
const struct DSGXSoftwareEdge* ea = a;
const struct DSGXSoftwareEdge* eb = b;
// Sort upside down
if (ea->y0 < eb->y0) {
return 1;
}
if (ea->y0 > eb->y0) {
return -1;
}
if (ea->y1 < eb->y1) {
return 1;
}
if (ea->y1 > eb->y1) {
return -1;
}
return 0;
}
static bool _edgeToSpan(struct DSGXSoftwareSpan* span, const struct DSGXSoftwareEdge* edge, int index, int32_t y) { static bool _edgeToSpan(struct DSGXSoftwareSpan* span, const struct DSGXSoftwareEdge* edge, int index, int32_t y) {
int32_t height = edge->y1 - edge->y0; int32_t height = edge->y1 - edge->y0;
int64_t yw = (y << 12) - edge->y0; int64_t yw = (y << 12) - edge->y0;
@ -192,9 +172,9 @@ static bool _edgeToSpan(struct DSGXSoftwareSpan* span, const struct DSGXSoftware
} }
// Clamp to bounds // Clamp to bounds
if (yw < 0) { if (yw < 0) {
yw = 0; return false;
} else if (yw > height) { } else if (yw > height) {
yw = height; return false;
} }
yw *= 0x100000000LL / height; yw *= 0x100000000LL / height;
@ -415,7 +395,6 @@ static void DSGXSoftwareRendererSetRAM(struct DSGXRenderer* renderer, struct DSG
edge->t1 = v0->vt; edge->t1 = v0->vt;
} }
} }
qsort(DSGXSoftwareEdgeListGetPointer(&softwareRenderer->activeEdges, 0), DSGXSoftwareEdgeListSize(&softwareRenderer->activeEdges), sizeof(struct DSGXSoftwareEdge), _edgeSort);
} }
static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int y) { static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int y) {
@ -426,11 +405,9 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
DSGXSoftwareSpanListClear(&softwareRenderer->activeSpans); DSGXSoftwareSpanListClear(&softwareRenderer->activeSpans);
memset(softwareRenderer->bucket, 0, sizeof(*softwareRenderer->bucket) * DS_GX_POLYGON_BUFFER_SIZE); memset(softwareRenderer->bucket, 0, sizeof(*softwareRenderer->bucket) * DS_GX_POLYGON_BUFFER_SIZE);
size_t i; size_t i;
for (i = DSGXSoftwareEdgeListSize(&softwareRenderer->activeEdges); i; --i) { for (i = 0; i < DSGXSoftwareEdgeListSize(&softwareRenderer->activeEdges); ++i) {
size_t idx = i - 1; struct DSGXSoftwareEdge* edge = DSGXSoftwareEdgeListGetPointer(&softwareRenderer->activeEdges, i);
struct DSGXSoftwareEdge* edge = DSGXSoftwareEdgeListGetPointer(&softwareRenderer->activeEdges, idx);
if (edge->y1 >> 12 < y) { if (edge->y1 >> 12 < y) {
DSGXSoftwareEdgeListShift(&softwareRenderer->activeEdges, idx, 1);
continue; continue;
} else if (edge->y0 >> 12 > y) { } else if (edge->y0 >> 12 > y) {
continue; continue;
@ -439,8 +416,9 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
unsigned poly = edge->polyId; unsigned poly = edge->polyId;
struct DSGXSoftwareSpan* span = softwareRenderer->bucket[poly]; struct DSGXSoftwareSpan* span = softwareRenderer->bucket[poly];
if (span && !span->ep[1].w) { if (span && !span->ep[1].w) {
_edgeToSpan(span, edge, 1, y); if (_edgeToSpan(span, edge, 1, y)) {
softwareRenderer->bucket[poly] = NULL; softwareRenderer->bucket[poly] = NULL;
}
} else if (!span) { } else if (!span) {
span = DSGXSoftwareSpanListAppend(&softwareRenderer->activeSpans); span = DSGXSoftwareSpanListAppend(&softwareRenderer->activeSpans);
memset(&span->ep[1], 0, sizeof(span->ep[1])); memset(&span->ep[1], 0, sizeof(span->ep[1]));
@ -475,8 +453,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
_lerpEndpoint(span, &ep, x); _lerpEndpoint(span, &ep, x);
color_t color = _lookupColor(&ep, span->poly); color_t color = _lookupColor(&ep, span->poly);
unsigned a = color >> 27; unsigned a = color >> 27;
if (a == 0x1F || (a && !(scanline[x] & 0xF8000000))) { if (a == 0x1F || !(scanline[x] & 0xF8000000)) {
// TODO: Alpha
if (softwareRenderer->wSort) { if (softwareRenderer->wSort) {
if (ep.w < softwareRenderer->depthBuffer[x]) { if (ep.w < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = ep.w; softwareRenderer->depthBuffer[x] = ep.w;
@ -495,14 +472,15 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
a = scanline[x] >> 27; a = scanline[x] >> 27;
} }
color |= a << 27; color |= a << 27;
scanline[x] = color;
if (softwareRenderer->wSort) { if (softwareRenderer->wSort) {
if (ep.w < softwareRenderer->depthBuffer[x]) { if (ep.w < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = ep.w; softwareRenderer->depthBuffer[x] = ep.w;
scanline[x] = color;
} }
} else { } else {
if (ep.z < softwareRenderer->depthBuffer[x]) { if (ep.z < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = ep.z; softwareRenderer->depthBuffer[x] = ep.z;
scanline[x] = color;
} }
} }
} }