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SIMD Resample. Correct max coefficient calculation

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Minimal test case:
Image.new('RGB', (341, 60), 'pink').resize((170, 60), Image.LANCZOS).save('_out.png')
This commit is contained in:
Alexander 2019-04-03 01:31:30 +03:00 committed by Alexander Karpinsky
parent b3c28911c0
commit a71b748bde
1 changed files with 6 additions and 5 deletions
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11
src/libImaging/Resample.c
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@ -297,11 +297,12 @@ normalize_coeffs_8bpc(int outSize, int ksize, double *prekk)
}
}
coefs_precision = 0;
while (maxkk < (1 << (MAX_COEFS_PRECISION-1)) && (coefs_precision < PRECISION_BITS)) {
maxkk *= 2;
coefs_precision += 1;
};
for (coefs_precision = 0; coefs_precision < PRECISION_BITS; coefs_precision += 1) {
int next_value = (int) (0.5 + maxkk * (1 << (coefs_precision + 1)));
// The next value will be outside of the range, so just stop
if (next_value >= (1 << MAX_COEFS_PRECISION))
break;
}
for (x = 0; x < outSize * ksize; x++) {
if (prekk[x] < 0) {