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fix alphatest. alphablending.

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This commit is contained in:
StapleButter
2017-03-15 15:53:36 +01:00
parent 6123ce8147
commit 29944c3c88
3 changed files with 56 additions and 14 deletions
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57
GPU3D_Soft.cpp
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@ -761,6 +761,7 @@ void RenderPolygon(Polygon* polygon, u32 wbuffer)
u32 color = RenderPixel(polygon, x, y, z, vr>>3, vg>>3, vb>>3, s, t);
u32 attr = 0;
u32 pixeladdr = (y*256) + x;
u8 alpha = color >> 24;
@ -769,14 +770,23 @@ void RenderPolygon(Polygon* polygon, u32 wbuffer)
{
if (alpha <= AlphaRef) continue;
}
else
{
if (alpha == 0) continue;
}
// alpha blending disable
// TODO: check alpha test when blending is disabled
if (!(DispCnt & (1<<3)))
alpha = 31;
u32 dstcolor = ColorBuffer[pixeladdr];
u32 dstalpha = dstcolor >> 24;
if (alpha == 31)
{
// edge fill rules for opaque pixels
// TODO, eventually: antialiasing
if (!wireframe)
{
if ((edge & 0x1) && slope_start > 0x1000)
@ -785,18 +795,39 @@ void RenderPolygon(Polygon* polygon, u32 wbuffer)
continue;
}
DepthBuffer[(y*256) + x] = z;
DepthBuffer[pixeladdr] = z;
}
else if (alpha > 0)
else if (dstalpha == 0)
{
//
// TODO: conditional Z-buffer update
DepthBuffer[pixeladdr] = z;
}
else
{
u32 srcR = color & 0x3F;
u32 srcG = (color >> 8) & 0x3F;
u32 srcB = (color >> 16) & 0x3F;
u32 dstR = dstcolor & 0x3F;
u32 dstG = (dstcolor >> 8) & 0x3F;
u32 dstB = (dstcolor >> 16) & 0x3F;
alpha++;
dstR = ((srcR * alpha) + (dstR * (32-alpha))) >> 5;
dstG = ((srcG * alpha) + (dstG * (32-alpha))) >> 5;
dstB = ((srcB * alpha) + (dstB * (32-alpha))) >> 5;
alpha--;
if (alpha > dstalpha) dstalpha = alpha;
color = dstR | (dstG << 8) | (dstB << 16) | (dstalpha << 24);
// TODO: conditional Z-buffer update
DepthBuffer[(y*256) + x] = z;
DepthBuffer[pixeladdr] = z;
}
ColorBuffer[(y*256) + x] = color;
AttrBuffer[(y*256) + x] = attr;
ColorBuffer[pixeladdr] = color;
AttrBuffer[pixeladdr] = attr;
}
if (lslope > 0) dxl += lslope;
@ -808,8 +839,6 @@ void RenderPolygon(Polygon* polygon, u32 wbuffer)
void RenderFrame(u32 attr, Vertex* vertices, Polygon* polygons, int npolys)
{
// TODO: render translucent polygons last
u32 polyid = (ClearAttr1 >> 24) & 0x3F;
if (DispCnt & (1<<14))
@ -866,9 +895,17 @@ void RenderFrame(u32 attr, Vertex* vertices, Polygon* polygons, int npolys)
}
}
// TODO: Y-sorting of translucent polygons
for (int i = 0; i < npolys; i++)
{//if (i<npolys-6) continue;//printf("poly %d\n", i);
//if (i<npolys-2)continue;
{
if (polygons[i].Translucent) continue;
RenderPolygon(&polygons[i], attr&0x2);
}
for (int i = 0; i < npolys; i++)
{
if (!polygons[i].Translucent) continue;
RenderPolygon(&polygons[i], attr&0x2);
}
}