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Made sinc work with zero argument

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This commit is contained in:
Ilia Popov
2010-10-27 02:01:28 +02:00
parent 484c5d94a1
commit 52c822ba85
1 changed files with 8 additions and 2 deletions
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10
rtengine/ipresize.cc
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@@ -64,7 +64,10 @@ void ImProcFunctions::resize (Image16* src, Image16* dst) {
for (int ii = ii0; ii < ii1; ii++) {
int k = ii - i0 + kc;
double z = M_PI * (y0 - (i0 + k - kc));
w[k] = sin(z) * sin(a*z) / (a * z * z);
if (z * z > 1e-6)
w[k] = sin(z) * sin(a*z) / (a * z * z);
else
w[k] = 1.0;
ww += w[k];
}
@@ -109,7 +112,10 @@ void ImProcFunctions::resize (Image16* src, Image16* dst) {
for (int jj = jj0; jj < jj1; jj++) {
int k = jj - j0 + kc;
double z = M_PI * (x0 - (j0 + k - kc));
w[k] = sin(z) * sin(a*z) / (a * z * z);
if (z * z > 1e-6)
w[k] = sin(z) * sin(a*z) / (a * z * z);
else
w[k] = 1.0;
ww += w[k];
}