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softgpu: Correct linear interp for uneven positions.

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Can't round to the pixel when calculating the S/T deltas.
This fixes issues in Wipeout (#16131) and Call of Duty bloom.
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Unknown W. Brackets committed 2022-10-16 18:57:55 -07:00
1 parent 9d6de98ed9
commit 7eb7bd5141
1 file changed
+4 -4
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GPU/Software/Rasterizer.cpp
+4 -4
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@@ -826,8 +826,8 @@ void DrawRectangle(const VertexData &v0, const VertexData &v1, const BinCoords &
tc1.t() *= 1.0f / (float)(1 << state.samplerID.height0Shift);
}
int diffX = (entireX2 - entireX1 + 1) / SCREEN_SCALE_FACTOR;
int diffY = (entireY2 - entireY1 + 1) / SCREEN_SCALE_FACTOR;
float diffX = (entireX2 - entireX1 + 1) / (float)SCREEN_SCALE_FACTOR;
float diffY = (entireY2 - entireY1 + 1) / (float)SCREEN_SCALE_FACTOR;
float diffS = tc1.s() - tc0.s();
float diffT = tc1.t() - tc0.t();
@@ -860,8 +860,8 @@ void DrawRectangle(const VertexData &v0, const VertexData &v1, const BinCoords &
}
// Okay, now move ST to the minX, minY position.
rowST += (stx / (float)(SCREEN_SCALE_FACTOR * 2)) * (minX - entireX1);
rowST += (sty / (float)(SCREEN_SCALE_FACTOR * 2)) * (minY - entireY1);
rowST += (stx / (float)(SCREEN_SCALE_FACTOR * 2)) * (minX - entireX1 + 1);
rowST += (sty / (float)(SCREEN_SCALE_FACTOR * 2)) * (minY - entireY1 + 1);
}
// And now what we add to spread out to 4 values.