HelloConstBuffer ported form C++ DirectX-Graphics-Samples

samples/DirectX/D3D12/Assets/Shaders/HelloConstBuffer.hlsl

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+// Copyright © Tanner Gooding and Contributors. Licensed under the MIT License (MIT). See License.md in the repository root for more information.
+
+// Ported from HelloConstBuffer\shaders.hlsl in https://github.com/Microsoft/DirectX-Graphics-Samples
+// Original source is Copyright © Microsoft. All rights reserved. Licensed under the MIT License (MIT).
+
+cbuffer SceneConstantBuffer : register(b0)
+{
+    float4 offset;
+};
+
+struct PSInput
+{
+    float4 position : SV_POSITION;
+    float4 color : COLOR;
+};
+
+PSInput VSMain(float4 position : POSITION, float4 color : COLOR)
+{
+    PSInput result;
+
+    result.position = position + offset;
+    result.color = color;
+
+    return result;
+}
+
+float4 PSMain(PSInput input) : SV_TARGET
+{
+    return input.color;
+}