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Merge pull request #3388 from hugovk/andreas-schwab/master

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Avoid undefined behaviour due to division by zero
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Hugo 2018-09-29 22:49:44 +03:00 committed by GitHub
commit 799133b3a4
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1 changed files with 11 additions and 4 deletions
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7
src/libImaging/QuantOctree.c
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@ -149,10 +149,17 @@ count_used_color_buckets(const ColorCube cube) {
static void static void
avg_color_from_color_bucket(const ColorBucket bucket, Pixel *dst) { avg_color_from_color_bucket(const ColorBucket bucket, Pixel *dst) {
float count = bucket->count; float count = bucket->count;
if (count != 0) {
dst->c.r = (int)(bucket->r / count); dst->c.r = (int)(bucket->r / count);
dst->c.g = (int)(bucket->g / count); dst->c.g = (int)(bucket->g / count);
dst->c.b = (int)(bucket->b / count); dst->c.b = (int)(bucket->b / count);
dst->c.a = (int)(bucket->a / count); dst->c.a = (int)(bucket->a / count);
} else {
dst->c.r = 0;
dst->c.g = 0;
dst->c.b = 0;
dst->c.a = 0;
}
} }
static int static int