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Hash: Add utility function to convert address to rgb values

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Some magic hashing, will become handy to make debug messages
easier to follow.
This commit is contained in:
Sergey Sharybin 2018-03-16 12:11:55 +01:00
parent 3baf31e73a
commit f0596bf660
1 changed files with 12 additions and 0 deletions
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12
source/blender/blenlib/BLI_hash.h
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@ -68,4 +68,16 @@ BLI_INLINE float BLI_hash_int_01(unsigned int k)
return (float)BLI_hash_int(k) * (1.0f / (float)0xFFFFFFFF);
}
BLI_INLINE void BLI_hash_pointer_to_color(const void *ptr, int *r, int *g, int *b)
{
size_t val = (size_t)ptr;
const size_t hash_a = BLI_hash_int(val & 0x0000ffff);
const size_t hash_b = BLI_hash_int((val & 0xffff0000) >> 32);
const size_t hash =
hash_a ^ (hash_b + 0x9e3779b9 + (hash_a << 6) + (hash_a >> 2));
*r = (hash & 0xff0000) >> 16;
*g = (hash & 0x00ff00) >> 8;
*b = hash & 0x0000ff;
}
#endif // __BLI_HASH_H__