diff options
Diffstat (limited to 'Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp')
| -rw-r--r-- | Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp b/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp index 680806e85a..00594ea3cf 100644 --- a/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp +++ b/Source/Plugins/Plugin_VideoSoftware/Src/Tev.cpp @@ -705,6 +705,57 @@ void Tev::Draw() Position[2] = ztex & 0x00ffffff;
}
+ // fog
+ if (bpmem.fog.c_proj_fsel.fsel)
+ {
+ float ze;
+
+ if (bpmem.fog.c_proj_fsel.proj == 0)
+ {
+ // perspective
+ // ze = A/(B - Zs)
+ s32 denom = bpmem.fog.b_magnitude - (Position[2] >> bpmem.fog.b_shift);
+ ze = bpmem.fog.a.GetA() / (float)denom;
+ }
+ else
+ {
+ // orthographic
+ // ze = a*Zs
+ ze = bpmem.fog.a.GetA() / (float)Position[2];
+ }
+
+ ze = (ze * (float)0xffffff) - bpmem.fog.c_proj_fsel.GetC();
+
+ // clamp 0 to 1
+ float fog = (ze<0.0f) ? 0.0f : ((ze>1.0f) ? 1.0f : ze);
+
+ switch (bpmem.fog.c_proj_fsel.fsel)
+ {
+ case 4: // exp
+ fog = 1.0f - pow(2.0f, -8.0f * fog);
+ break;
+ case 5: // exp2
+ fog = 1.0f - pow(2.0f, -8.0f * fog * fog);
+ break;
+ case 6: // backward exp
+ fog = 1.0f - fog;
+ fog = 1.0f - pow(2.0f, -8.0f * fog);
+ break;
+ case 7: // backward exp2
+ fog = 1.0f - fog;
+ fog = 1.0f - pow(2.0f, -8.0f * fog * fog);
+ break;
+ }
+
+ // lerp from output to fog color
+ u32 fogInt = (u32)(fog * 256);
+ u32 invFog = 256 - fogInt;
+
+ output[RED_C] = (output[RED_C] * invFog + fogInt * bpmem.fog.color.r) >> 8;
+ output[GRN_C] = (output[GRN_C] * invFog + fogInt * bpmem.fog.color.g) >> 8;
+ output[BLU_C] = (output[BLU_C] * invFog + fogInt * bpmem.fog.color.b) >> 8;
+ }
+
if (!bpmem.zcontrol.zcomploc && bpmem.zmode.testenable)
{
if (!EfbInterface::ZCompare(Position[0], Position[1], Position[2]))
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