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DS GX: Minor optimizations

This commit is contained in:
Vicki Pfau 2017-03-21 16:36:15 -07:00
parent 2b6ed2661e
commit 13bc1125ce
1 changed files with 13 additions and 14 deletions
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27
src/ds/gx/software.c
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@ -667,6 +667,10 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
if (x < 0) {
x = 0;
}
unsigned stencilValue = span->polyId;
if (span->poly->blendFormat == 3) {
stencilValue |= 0x40;
}
for (; x < (span->ep[1].coord[0] >> 12) && x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
color_t color = _lookupColor(softwareRenderer, &span->ep[0], span->poly);
_stepEndpoint(span);
@ -674,16 +678,13 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
unsigned current = scanline[x];
unsigned b = current >> 27;
unsigned ab = a;
unsigned s = span->polyId;
unsigned s = stencilValue;
if (b > ab) {
ab = b;
}
if (span->poly->blendFormat == 3) {
s |= 0x40;
}
if (a == 0x1F) {
if (span->ep[0].coord[softwareRenderer->sort] < softwareRenderer->depthBuffer[x]) {
if (s != 0x40 && !(softwareRenderer->stencilBuffer[x] & 0x40)) {
if (!(s == 0x40 || (softwareRenderer->stencilBuffer[x] & 0x40))) {
softwareRenderer->depthBuffer[x] = span->ep[0].coord[softwareRenderer->sort];
scanline[x] = color;
s &= ~0x40;
@ -696,17 +697,15 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
color = _mix32(a, color, 0x1F - a, current);
color |= ab << 27;
}
if (softwareRenderer->stencilBuffer[x] != s) {
if (span->ep[0].coord[softwareRenderer->sort] < softwareRenderer->depthBuffer[x]) {
if (s != 0x40 && !(softwareRenderer->stencilBuffer[x] & 0x40)) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].coord[softwareRenderer->sort];
}
scanline[x] = color;
s &= ~0x40;
if (softwareRenderer->stencilBuffer[x] != s && span->ep[0].coord[softwareRenderer->sort] < softwareRenderer->depthBuffer[x]) {
if (!(s == 0x40 || (softwareRenderer->stencilBuffer[x] & 0x40))) {
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].coord[softwareRenderer->sort];
}
softwareRenderer->stencilBuffer[x] = s;
scanline[x] = color;
s &= ~0x40;
}
softwareRenderer->stencilBuffer[x] = s;
}
}
}