59 lines
1.9 KiB
C#
59 lines
1.9 KiB
C#
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using System.Collections.Generic;
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using System.IO;
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using System.Collections.ObjectModel;
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using UnityEngine;
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namespace UnityEditor.U2D.Aseprite
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{
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/// <summary>
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/// Parsed representation of an Aseprite Old Palette chunk.
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/// Not supported yet.
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/// </summary>
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internal class OldPaletteChunk : BaseChunk, IPaletteProvider
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{
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/// <inheritdoc />
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public override ChunkTypes chunkType => ChunkTypes.OldPalette;
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/// <summary>
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/// Array of palette entries.
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/// </summary>
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public ReadOnlyCollection<PaletteEntry> entries => System.Array.AsReadOnly(m_Entries);
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PaletteEntry[] m_Entries;
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internal OldPaletteChunk(uint chunkSize) : base(chunkSize) { }
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/// <summary>
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/// Read and store the chunk data.
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/// </summary>
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/// <param name="reader">The active binary reader of the file.</param>
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protected override void InternalRead(BinaryReader reader)
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{
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var noOfPackets = reader.ReadUInt16();
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var colorEntries = new List<PaletteEntry>();
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var colorIndex = 0;
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for (var i = 0; i < noOfPackets; ++i)
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{
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var noOfColorsToSkip = reader.ReadByte();
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colorIndex += noOfColorsToSkip;
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int noOfColorsInEntry = reader.ReadByte();
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if (noOfColorsInEntry == 0)
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noOfColorsInEntry = 256;
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// If j + colorIndex >= 256 it means that the color chunk is invalid, so we stop reading.
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for (var j = 0; j < noOfColorsInEntry && (j + colorIndex < 256); ++j)
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{
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var r = reader.ReadByte();
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var g = reader.ReadByte();
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var b = reader.ReadByte();
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colorEntries.Add(new PaletteEntry("", new Color32(r, g, b, 255)));
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}
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}
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m_Entries = colorEntries.ToArray();
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}
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}
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}
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