ScriptableRenderPipeline/ScriptableRenderPipeline/Core/Resources/GPUCopy.cs

// Autogenerated file. Do not edit by hand
using System;
using UnityEngine.Rendering;

namespace UnityEngine.Experimental.Rendering
{
    public class GPUCopy
    {
        ComputeShader m_Shader;
        int k_SampleKernel_xyzw2x;

        public GPUCopy(ComputeShader shader)
        {
            m_Shader = shader;
            k_SampleKernel_xyzw2x = m_Shader.FindKernel("KSampleCopy4_1_x");
        }

        static readonly int _Result1 = Shader.PropertyToID("_Result1");
        static readonly int _Source4 = Shader.PropertyToID("_Source4");
        static readonly int _Size = Shader.PropertyToID("_Size");
        public void SampleCopyChannel_xyzw2x(CommandBuffer cmd, RenderTargetIdentifier source, RenderTargetIdentifier target, Vector2 size)
            {
                if (size.x < 8 || size.y < 8)
                    Debug.LogWarning("Trying to copy a channel from a texture smaller than 8x* or *x8. ComputeShader cannot perform it.");
                var s = new Vector4(size.x, size.y, 1f / size.x, 1f / size.y);
                cmd.SetComputeVectorParam(m_Shader, _Size, s);
                cmd.SetComputeTextureParam(m_Shader, k_SampleKernel_xyzw2x, _Source4, source);
                cmd.SetComputeTextureParam(m_Shader, k_SampleKernel_xyzw2x, _Result1, target);
                cmd.DispatchCompute(m_Shader, k_SampleKernel_xyzw2x, (int)(size.x) / 8, (int)(size.y) / 8, 1);
            }

    }
}