void PushDownsampleCommands()

in unity/Assets/PostProcessingV2/Runtime/Effects/MultiScaleVO.cs [203:257]
43 lines of code
4 McCabe index (conditional complexity)

        void PushDownsampleCommands(CommandBuffer cmd, Camera camera, RenderTargetIdentifier? depthMap)
        {
            RenderTargetIdentifier depthMapId;
            bool needDepthMapRelease = false;

            if (depthMap != null)
            {
                depthMapId = depthMap.Value;
            }
            else
            {
                // Make a copy of the depth texture, or reuse the resolved depth
                // buffer (it's only available in some specific situations).
                if (!RuntimeUtilities.IsResolvedDepthAvailable(camera))
                {
                    Alloc(cmd, ShaderIDs.DepthCopy, MipLevel.Original, RenderTextureFormat.RFloat, false);
                    depthMapId = new RenderTargetIdentifier(ShaderIDs.DepthCopy);
                    cmd.BlitFullscreenTriangle(BuiltinRenderTextureType.None, depthMapId, m_PropertySheet, (int)Pass.DepthCopy);
                    needDepthMapRelease = true;
                }
                else
                {
                    depthMapId = BuiltinRenderTextureType.ResolvedDepth;
                }
            }

            // 1st downsampling pass.
            var cs = m_Resources.computeShaders.multiScaleAODownsample1;
            int kernel = cs.FindKernel("main");

            cmd.SetComputeTextureParam(cs, kernel, "LinearZ", ShaderIDs.LinearDepth);
            cmd.SetComputeTextureParam(cs, kernel, "DS2x", ShaderIDs.LowDepth1);
            cmd.SetComputeTextureParam(cs, kernel, "DS4x", ShaderIDs.LowDepth2);
            cmd.SetComputeTextureParam(cs, kernel, "DS2xAtlas", ShaderIDs.TiledDepth1);
            cmd.SetComputeTextureParam(cs, kernel, "DS4xAtlas", ShaderIDs.TiledDepth2);
            cmd.SetComputeVectorParam(cs, "ZBufferParams", CalculateZBufferParams(camera));
            cmd.SetComputeTextureParam(cs, kernel, "Depth", depthMapId);

            cmd.DispatchCompute(cs, kernel, m_Widths[(int)MipLevel.L4], m_Heights[(int)MipLevel.L4], 1);

            if (needDepthMapRelease)
                Release(cmd, ShaderIDs.DepthCopy);

            // 2nd downsampling pass.
            cs = m_Resources.computeShaders.multiScaleAODownsample2;
            kernel = cs.FindKernel("main");

            cmd.SetComputeTextureParam(cs, kernel, "DS4x", ShaderIDs.LowDepth2);
            cmd.SetComputeTextureParam(cs, kernel, "DS8x", ShaderIDs.LowDepth3);
            cmd.SetComputeTextureParam(cs, kernel, "DS16x", ShaderIDs.LowDepth4);
            cmd.SetComputeTextureParam(cs, kernel, "DS8xAtlas", ShaderIDs.TiledDepth3);
            cmd.SetComputeTextureParam(cs, kernel, "DS16xAtlas", ShaderIDs.TiledDepth4);

            cmd.DispatchCompute(cs, kernel, m_Widths[(int)MipLevel.L6], m_Heights[(int)MipLevel.L6], 1);
        }