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DS GX: Fix alpha blending

This commit is contained in:
Vicki Pfau 2017-03-18 23:13:43 -07:00
parent edc88dc91e
commit ce40b8a038
2 changed files with 7 additions and 10 deletions
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1
include/mgba/internal/ds/gx.h
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@ -52,6 +52,7 @@ DECL_BITS(DSGXPolygonAttrs, Lights, 0, 4);
DECL_BITS(DSGXPolygonAttrs, Mode, 4, 2);
DECL_BIT(DSGXPolygonAttrs, FrontFace, 6);
DECL_BIT(DSGXPolygonAttrs, BackFace, 7);
DECL_BIT(DSGXPolygonAttrs, UpdateDepth, 11);
// TODO
DECL_BITS(DSGXPolygonAttrs, Alpha, 16, 5);

16
src/ds/gx/software.c
View File

@ -631,15 +631,11 @@ static void DSGXSoftwareRendererDrawScanline(struct DSGXRenderer* renderer, int
if (span->ep[0].w < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = span->ep[0].w;
scanline[x] = color;
} else if (b < 0x1F) {
scanline[x] = _mix32(b, current, 0x1F - b, color) | a << 27;
}
} else {
if (span->ep[0].z < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
scanline[x] = color;
} else if (b < 0x1F) {
scanline[x] = _mix32(b, current, 0x1F - b, color) | a << 27;
}
}
} else if (a) {
@ -650,17 +646,17 @@ 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;
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].w;
}
scanline[x] = color;
} else if (b < 0x1F) {
scanline[x] = _mix32(b, current, 0x1F - b, color) | ab << 27;
}
} else {
if (span->ep[0].z < softwareRenderer->depthBuffer[x]) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
if (DSGXPolygonAttrsIsUpdateDepth(span->poly->poly->polyParams)) {
softwareRenderer->depthBuffer[x] = span->ep[0].z;
}
scanline[x] = color;
} else if (b < 0x1F) {
scanline[x] = _mix32(b, current, 0x1F - b, color) | ab << 27;
}
}
}