using System;

using System.Runtime.CompilerServices;

using BCnEncoder.Shared;

using BCnEncoder.Shared.Colors;

using CommunityToolkit.HighPerformance;

namespace BCnEncoder.Decoder

{

internal class RawDecoder<TColor> : IBcDecoder where TColor : unmanaged, IColor

{

/// <inheritdoc />

public byte[] Decode(ReadOnlyMemory<byte> data, int width, int height, OperationContext context)

{

if (data.Length != width * height * Unsafe.SizeOf<TColor>())

{

throw new ArgumentException("Input data buffer incorrectly sized!");

}

var bytes = data.Cast<byte, TColor>().ConvertToAsBytes<TColor, ColorRgbaFloat>(context.ColorConversionMode);

context.Progress?.Report(width * height);

return bytes;

}

/// <inheritdoc />

public ColorRgbaFloat[] DecodeColor(ReadOnlyMemory<byte> data, int width, int height, OperationContext context)

{

if (data.Length != width * height * Unsafe.SizeOf<TColor>())

{

throw new ArgumentException("Input data buffer incorrectly sized!");

}

var colors = data.Cast<byte, TColor>().ConvertTo<TColor, ColorRgbaFloat>(context.ColorConversionMode);

context.Progress?.Report(width * height);

return colors;

}

}

}