mirror of
https://github.com/kwsch/NHSE.git
synced 2026-04-21 16:07:26 -05:00
b88c518d5c
Updates the Field Item Editor to render layers based on the entire map, and the per-patch positioning of each layer. Import/export will gracefully handle upgrade/downgrade, and viewport import/export will gracefully update tiles rather than a per-acre basis. Performance has also been slightly improved; no allocation is done anymore when updating the image.
39 lines
1.1 KiB
C#
39 lines
1.1 KiB
C#
using System;
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namespace NHSE.Core;
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/// <summary>
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/// Utility logic for dealing with bitflags in a byte array.
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/// </summary>
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public static class FlagUtil
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{
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public static bool GetFlag(ReadOnlySpan<byte> arr, int offset, int bitIndex)
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{
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var b = arr[offset + (bitIndex >> 3)];
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var mask = 1 << (bitIndex & 7);
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return (b & mask) != 0;
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}
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public static void SetFlag(Span<byte> arr, int offset, int bitIndex, bool value)
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{
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offset += (bitIndex >> 3);
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bitIndex &= 7; // ensure bit access is 0-7
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arr[offset] &= (byte)~(1 << bitIndex);
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arr[offset] |= (byte)((value ? 1 : 0) << bitIndex);
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}
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public static bool GetFlag(ReadOnlySpan<byte> arr, int bitIndex)
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{
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var b = arr[bitIndex >> 3];
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var mask = 1 << (bitIndex & 7);
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return (b & mask) != 0;
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}
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public static void SetFlag(Span<byte> arr, int bitIndex, bool value)
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{
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var offset = bitIndex >> 3;
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bitIndex &= 7; // ensure bit access is 0-7
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arr[offset] &= (byte)~(1 << bitIndex);
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arr[offset] |= (byte)((value ? 1 : 0) << bitIndex);
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}
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} |