91 lines
2.7 KiB
C#
91 lines
2.7 KiB
C#
using System.Collections.ObjectModel;
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using System.IO;
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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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/// Structure for an entry in the color palette.
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/// </summary>
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public struct PaletteEntry
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{
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internal PaletteEntry(string name, Color32 color)
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{
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this.name = name;
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this.color = color;
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}
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/// <summary>
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/// Name of the color.
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/// </summary>
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public string name { get; private set; }
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/// <summary>
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/// Color value.
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/// </summary>
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public Color32 color { get; private set; }
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}
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/// <summary>
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/// Parsed representation of an Aseprite Palette chunk.
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/// </summary>
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public class PaletteChunk : BaseChunk, IPaletteProvider
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{
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/// <inheritdoc />
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public override ChunkTypes chunkType => ChunkTypes.Palette;
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/// <summary>
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/// Number of entries in the palette.
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/// </summary>
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public uint noOfEntries { get; private set; }
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/// <summary>
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/// Index of the first color to change.
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/// </summary>
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public uint firstColorIndex { get; private set; }
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/// <summary>
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/// Index of the last color to change.
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/// </summary>
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public uint lastColorIndex { get; private set; }
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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 PaletteChunk(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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noOfEntries = reader.ReadUInt32();
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firstColorIndex = reader.ReadUInt32();
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lastColorIndex = reader.ReadUInt32();
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// Reserved bytes
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for (var i = 0; i < 8; ++i)
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reader.ReadByte();
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m_Entries = new PaletteEntry[noOfEntries];
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for (var i = 0; i < noOfEntries; ++i)
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{
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var entryFlag = reader.ReadUInt16();
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var red = reader.ReadByte();
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var green = reader.ReadByte();
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var blue = reader.ReadByte();
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var alpha = reader.ReadByte();
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var color = new Color32(red, green, blue, alpha);
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var name = "";
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var hasName = entryFlag == 1;
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if (hasName)
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name = AsepriteUtilities.ReadString(reader);
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m_Entries[i] = new PaletteEntry(name, color);
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}
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}
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}
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}
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