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move backend to subfolder

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This commit is contained in:
Vinzenz Schroeter 2024-04-21 12:38:03 +02:00
commit 8d09663eff
1 changed files with 97 additions and 87 deletions
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59
DisplayCommands/PixelGrid.cs
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@ -1,59 +0,0 @@
using System.Diagnostics;
namespace DisplayCommands;
public sealed class PixelGrid(ushort width, ushort height) : IEquatable<PixelGrid>
{
private readonly ByteGrid _byteGrid = new((ushort)(width / 8u), height);
public ushort Width { get; } = width;
public ushort Height { get; } = height;
public Memory<byte> Data => _byteGrid.Data;
public bool this[ushort x, ushort y]
{
get
{
Debug.Assert(y < Height);
var (byteIndex, bitInByteMask) = GetIndexes(x);
var byteVal = _byteGrid[byteIndex, y];
return (byteVal & bitInByteMask) != 0;
}
set
{
Debug.Assert(y < Height);
var (byteIndex, bitInByteMask) = GetIndexes(x);
if (value)
_byteGrid[byteIndex, y] |= bitInByteMask;
else
_byteGrid[byteIndex, y] &= (byte)(ushort.MaxValue ^ bitInByteMask);
}
}
public void Clear() => _byteGrid.Clear();
public bool Equals(PixelGrid? other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Width == other.Width && Height == other.Height && _byteGrid.Equals(other._byteGrid);
}
public override bool Equals(object? obj) => ReferenceEquals(this, obj) || (obj is PixelGrid other && Equals(other));
public override int GetHashCode() => HashCode.Combine(_byteGrid, Width, Height);
public static bool operator ==(PixelGrid? left, PixelGrid? right) => Equals(left, right);
public static bool operator !=(PixelGrid? left, PixelGrid? right) => !Equals(left, right);
private (ushort byteIndex, byte bitInByteMask) GetIndexes(int x)
{
Debug.Assert(x < Width);
var byteIndex = (ushort)(x / 8);
Debug.Assert(byteIndex < Width);
var bitInByteIndex = (byte)(7 - x % 8);
Debug.Assert(bitInByteIndex < 8);
var bitInByteMask = (byte)(1 << bitInByteIndex);
return (byteIndex, bitInByteMask);
}
}