45 lines
1.2 KiB
C#
45 lines
1.2 KiB
C#
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using System;
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namespace UnityEngine.U2D.Animation
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{
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internal static class SpriteLibraryUtility
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{
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// Allow delegate override for test
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internal static Func<string, int> GetStringHash = Bit30Hash_GetStringHash;
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/// <summary>
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/// Used to convert Sprite Key to the new Sprite Hash.
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/// </summary>
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/// <param name="input">Sprite Key to convert</param>
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/// <returns>A 30-bit long hash.</returns>
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internal static int Convert32BitTo30BitHash(int input)
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{
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int output = PreserveFirst30Bits(input);
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return output;
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}
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static int Bit30Hash_GetStringHash(string value)
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{
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#if DEBUG_GETSTRINGHASH_CLASH
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if (value == "abc" || value == "123")
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value = "abc";
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#endif
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int hash = Animator.StringToHash(value);
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hash = PreserveFirst30Bits(hash);
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return hash;
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}
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static int PreserveFirst30Bits(int input)
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{
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const int mask = 0x3FFFFFFF;
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return input & mask;
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}
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internal static long GenerateHash()
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{
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long hash = DateTime.Now.Ticks;
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return hash;
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}
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}
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}
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