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Merge pull request #8098 from Unity-Technologies/internal/2021.3/staging
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125 changes: 125 additions & 0 deletions
125
Packages/com.unity.render-pipelines.core/Runtime/Utilities/HashFNV1A32.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| using System; | ||
| using System.Runtime.CompilerServices; | ||
|
|
||
| namespace UnityEngine.Rendering | ||
| { | ||
| internal ref struct HashFNV1A32 | ||
| { | ||
| /// <summary> | ||
| /// FNV prime. | ||
| /// </summary> | ||
| const uint k_Prime = 16777619; | ||
|
|
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| /// <summary> | ||
| /// FNV offset basis. | ||
| /// </summary> | ||
| const uint k_OffsetBasis = 2166136261; | ||
|
|
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| uint m_Hash; | ||
|
|
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| public static HashFNV1A32 Create() | ||
| { | ||
| return new HashFNV1A32 { m_Hash = k_OffsetBasis }; | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in int input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in uint input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ input) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in bool input) | ||
| { | ||
| m_Hash = (m_Hash ^ (input ? 1u : 0u)) * k_Prime; | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in float input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in double input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in Vector2 input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in Vector3 input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(in Vector4 input) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append<T>(T input) where T : struct | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)input.GetHashCode()) * k_Prime; | ||
| } | ||
| } | ||
|
|
||
| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| public void Append(Delegate del) | ||
| { | ||
| unchecked | ||
| { | ||
| m_Hash = (m_Hash ^ (uint)GetFuncHashCode(del)) * k_Prime; | ||
| } | ||
| } | ||
|
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| [MethodImpl(MethodImplOptions.AggressiveInlining)] | ||
| internal static int GetFuncHashCode(Delegate del) | ||
| { | ||
| return del.Method.GetHashCode() ^ RuntimeHelpers.GetHashCode(del.Target); | ||
| } | ||
|
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| public int value => (int)m_Hash; | ||
|
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| public override int GetHashCode() | ||
| { | ||
| return value; | ||
| } | ||
| } | ||
| } |
3 changes: 3 additions & 0 deletions
3
Packages/com.unity.render-pipelines.core/Runtime/Utilities/HashFNV1A32.cs.meta
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