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Corrected undefined behaviour

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This commit is contained in:
Andrew Murray 2018-04-21 13:42:39 +10:00
parent 1b9a41f2de
commit eebe3ea923
1 changed files with 3 additions and 1 deletions
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4
src/libImaging/Effects.c
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@ -79,6 +79,7 @@ ImagingEffectNoise(int xsize, int ysize, float sigma)
Imaging imOut;
int x, y;
int nextok;
int d;
double this, next;
imOut = ImagingNewDirty("L", xsize, ysize);
@ -106,7 +107,8 @@ ImagingEffectNoise(int xsize, int ysize, float sigma)
this = factor * v1;
next = factor * v2;
}
out[x] = (unsigned char) (128 + sigma * this);
d = 128 + sigma * this;
out[x] = d<0 ? 0 : (d>UCHAR_MAX ? UCHAR_MAX : d);
}
}