Automap/Data/PngMetadataChunk.cs

   1 using System;
   2
   3 using Vintagestory.API.Util;
   4
   5 using Hjg.Pngcs;
   6 using Hjg.Pngcs.Chunks;
   7
   8 namespace Automap
   9 {
  10         /// <summary>
  11         /// Png metadata chunk.
  12         /// </summary>
  13         /// <remarks>There can be only one. (per PNG file)</remarks>
  14         public class PngMetadataChunk : PngChunkSingle
  15         {
  16                 // ID must follow the PNG conventions: four ascii letters,
  17                 public readonly static string ID = "cHUK";
  18
  19                 public ColumnMeta ChunkMetadata { get; set; }
  20
  21
  22                 public PngMetadataChunk(ImageInfo info) : base(ID, info)
  23                 {
  24
  25                 }
  26
  27                 public override ChunkOrderingConstraint GetOrderingConstraint()
  28                 {
  29                         return ChunkOrderingConstraint.NONE;
  30                 }
  31
  32                 public override ChunkRaw CreateRawChunk()
  33                 {
  34                         var datas = SerializerUtil.Serialize<ColumnMeta>(ChunkMetadata);
  35
  36                         ChunkRaw rawChunk = createEmptyChunk(datas.Length, true);
  37                         rawChunk.Data = datas;
  38
  39                         return rawChunk;
  40                 }
  41
  42                 public override void ParseFromRaw(ChunkRaw rawChunk)
  43                 {
  44                         this.ChunkMetadata = SerializerUtil.Deserialize<ColumnMeta>(rawChunk.Data);
  45                 }
  46
  47                 public override void CloneDataFromRead(PngChunk other)
  48                 {
  49                         PngMetadataChunk clone = (PngMetadataChunk) other;
  50                         this.ChunkMetadata = clone.ChunkMetadata;
  51                 }
  52
  53         }
  54 }
  55