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Fix matrix inversion

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This commit is contained in:
Andrew Cassidy
2021-03-01 23:53:30 -08:00
parent ac62e1c262
commit f7f5a10b66
2 changed files with 2 additions and 0 deletions
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1
src/BC1/BC1Encoder.cpp
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@ -602,6 +602,7 @@ template <ColorMode M> bool BC1Encoder::RefineEndpointsLS(Color4x4 pixels, Encod
return false; return false;
} }
std::swap(matrix[0], matrix[3]);
matrix *= Vector4(1, -1, -1, 1); matrix *= Vector4(1, -1, -1, 1);
matrix *= ((float)denominator / 255.0f) / det; matrix *= ((float)denominator / 255.0f) / det;

1
src/BC1/OrderTable.h
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@ -74,6 +74,7 @@ template <size_t N> class OrderTable {
if (fabs(det) < 1e-8f) { if (fabs(det) < 1e-8f) {
factors->at(i) = Vector4(0); factors->at(i) = Vector4(0);
} else { } else {
std::swap(factor_matrix[0], factor_matrix[3]);
factor_matrix *= Vector4(1, -1, -1, 1); factor_matrix *= Vector4(1, -1, -1, 1);
factor_matrix *= (denominator / 255.0f) / det; factor_matrix *= (denominator / 255.0f) / det;
factors->at(i) = factor_matrix; factors->at(i) = factor_matrix;