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DS GX: Add polygon IDs to the framebuffer

This commit is contained in:
Vicki Pfau 2017-03-21 15:15:06 -07:00
parent d7ce8f9f06
commit d5445799a6
3 changed files with 22 additions and 11 deletions
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1
include/mgba/internal/ds/gx.h
View File

@ -55,6 +55,7 @@ DECL_BIT(DSGXPolygonAttrs, BackFace, 7);
DECL_BIT(DSGXPolygonAttrs, UpdateDepth, 11);
// TODO
DECL_BITS(DSGXPolygonAttrs, Alpha, 16, 5);
DECL_BITS(DSGXPolygonAttrs, Id, 24, 6);
enum DSGXCommand {
DS_GX_CMD_NOP = 0,

2
include/mgba/internal/ds/gx/software.h
View File

@ -70,6 +70,7 @@ struct DSGXSoftwareEndpoint {
struct DSGXSoftwareSpan {
struct DSGXSoftwarePolygon* poly;
int polyId;
struct DSGXSoftwareEndpoint ep[2];
struct DSGXSoftwareEndpoint step;
};
@ -87,6 +88,7 @@ struct DSGXSoftwareRenderer {
struct DSGXSoftwareSpan** bucket;
int32_t depthBuffer[DS_VIDEO_HORIZONTAL_PIXELS];
uint8_t polygonIdBuffer[DS_VIDEO_HORIZONTAL_PIXELS];
color_t* scanlineCache;
bool flushPending;
bool wSort;

30
src/ds/gx/software.c
View File

@ -639,6 +639,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
span = DSGXSoftwareSpanListAppend(&softwareRenderer->activeSpans);
memset(&span->ep[1], 0, sizeof(span->ep[1]));
span->poly = DSGXSoftwarePolygonListGetPointer(&softwareRenderer->activePolys, poly);
span->polyId = DSGXPolygonAttrsGetId(span->poly->poly->polyParams);
if (!_edgeToSpan(span, edge, 0, y << 12)) {
// Horizontal line
DSGXSoftwareSpanListShift(&softwareRenderer->activeSpans, DSGXSoftwareSpanListSize(&softwareRenderer->activeSpans) - 1, 1);
@ -650,6 +651,7 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
color_t* scanline = &softwareRenderer->scanlineCache[DS_VIDEO_HORIZONTAL_PIXELS * y];
memset(scanline, 0, sizeof(color_t) * DS_VIDEO_HORIZONTAL_PIXELS);
memset(softwareRenderer->polygonIdBuffer, 0, sizeof(softwareRenderer->polygonIdBuffer[0]) * DS_VIDEO_HORIZONTAL_PIXELS);
for (i = 0; i < DS_VIDEO_HORIZONTAL_PIXELS; i += 4) {
softwareRenderer->depthBuffer[i] = INT32_MAX;
softwareRenderer->depthBuffer[i + 1] = INT32_MAX;
@ -678,11 +680,13 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
if (softwareRenderer->wSort) {
if (span->ep[0].w < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = span->ep[0].w;
softwareRenderer->polygonIdBuffer[x] = span->polyId;
scanline[x] = color;
}
} else {
if (span->ep[0].z < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
softwareRenderer->polygonIdBuffer[x] = span->polyId;
scanline[x] = color;
}
}
@ -692,19 +696,23 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
color = _mix32(a, color, 0x1F - a, current);
color |= ab << 27;
}
if (softwareRenderer->wSort) {
if (span->ep[0].w < softwareRenderer->depthBuffer[x]) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].w;
if (softwareRenderer->polygonIdBuffer[x] != span->polyId) {
if (softwareRenderer->wSort) {
if (span->ep[0].w < softwareRenderer->depthBuffer[x]) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].w;
}
softwareRenderer->polygonIdBuffer[x] = span->polyId;
scanline[x] = color;
}
scanline[x] = color;
}
} else {
if (span->ep[0].z < softwareRenderer->depthBuffer[x]) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
} else {
if (span->ep[0].z < softwareRenderer->depthBuffer[x]) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
}
softwareRenderer->polygonIdBuffer[x] = span->polyId;
scanline[x] = color;
}
scanline[x] = color;
}
}
}