// <copyright file="Block8x8F.cs" company="James Jackson-South">
// Copyright (c) James Jackson-South and contributors.
// Licensed under the Apache License, Version 2.0.
// </copyright>
// ReSharper disable InconsistentNaming
<#@ template debug="false" hostspecific="false" language="C#" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>
<#@ import namespace="System.Text" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ output extension=".cs" #>
// <auto-generated />
#pragma warning disable
using System;
using System.Numerics;
using System.Runtime.CompilerServices;

<#
char[] coordz = {'X', 'Y', 'Z', 'W'};
#>

namespace ImageSharp.Formats.Jpg
{
	internal partial struct Block8x8F
    {
        private static readonly Vector4 CMin4 = new Vector4(-128f);
        private static readonly Vector4 CMax4 = new Vector4(127f);
        private static readonly Vector4 COff4 = new Vector4(128f);

		/// <summary>
        /// Transpose the block into d
        /// </summary>
        /// <param name="d">Destination</param>
		[MethodImpl(MethodImplOptions.AggressiveInlining)]
        public void TransposeInto(ref Block8x8F d)
        {
            <#
			PushIndent("            "); 

            for (int i = 0; i < 8; i++)
            {
                char destCoord = coordz[i % 4];
                char destSide = (i / 4) % 2 == 0 ? 'L' : 'R';

                for (int j = 0; j < 8; j++)
                {
                    char srcCoord = coordz[j % 4];
                    char srcSide = (j / 4) % 2 == 0 ? 'L' : 'R';
                    
                    string expression = $"d.V{j}{destSide}.{destCoord} = V{i}{srcSide}.{srcCoord}; ";
					Write(expression);
                }
				WriteLine("");
            }
			PopIndent();
			#>
        }

		/// <summary>
        /// Level shift by +128, clip to [0, 255]
        /// </summary>
        /// <param name="d">Destination</param>
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        internal void TransformByteConvetibleColorValuesInto(ref Block8x8F d)
        {
            <#

			PushIndent("            "); 

            for (int i = 0; i < 8; i++)
            {
                for (int j = 0; j < 2; j++)
                {
					char side = j == 0 ? 'L' : 'R';
					Write($"d.V{i}{side} = Vector4.Max(Vector4.Min(V{i}{side}, CMax4), CMin4) + COff4;");
                }
				WriteLine("");
            }
			PopIndent();
			#>
        }


	}
}