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SoftGPU: Correct texturing for pixel centers.

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Unknown W. Brackets 2017-05-13 07:53:39 -07:00
parent 6b0c9a5531
commit 9e34601be2
1 changed files with 8 additions and 4 deletions
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12
GPU/Software/Rasterizer.cpp
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@ -1201,14 +1201,17 @@ static inline void ApplyTexturing(Vec4<int> *prim_color, const Vec4<float> &s, c
int width = gstate.getTextureWidth(0);
int height = gstate.getTextureHeight(0);
float ds = (s[1] - s[0]) * width;
float dt = (t[2] - t[0]) * height;
float ds = s[1] - s[0];
float dt = t[2] - t[0];
Vec4<float> os = s + Vec4<float>::AssignToAll(ds * 0.5f);
Vec4<float> ot = t + Vec4<float>::AssignToAll(dt * 0.5f);
// With 8 bits of fraction (because texslope can be fairly precise.)
int detail;
switch (gstate.getTexLevelMode()) {
case GE_TEXLEVEL_MODE_AUTO:
detail = TexLog2(std::max(ds, dt));
detail = TexLog2(std::max(ds * width, dt * height));
break;
case GE_TEXLEVEL_MODE_SLOPE:
// This is always offset by an extra texlevel.
@ -1247,7 +1250,7 @@ static inline void ApplyTexturing(Vec4<int> *prim_color, const Vec4<float> &s, c
}
for (int i = 0; i < 4; ++i) {
ApplyTexturing(prim_color[i], s[i], t[i], level, levelFrac, filt, texptr, texbufwidthbytes);
ApplyTexturing(prim_color[i], os[i], ot[i], level, levelFrac, filt, texptr, texbufwidthbytes);
}
}
@ -1677,6 +1680,7 @@ void DrawLine(const VertexData &v0, const VertexData &v1)
s *= 1.0f / (float)gstate.getTextureWidth(0);
t *= 1.0f / (float)gstate.getTextureHeight(0);
}
// TODO: ds/dt.
ApplyTexturing(prim_color, s, t, 0, 0, magFilt, texptr, texbufwidthbytes);
}