git-svn-id: svn://svn.ijw.co.nz/svn/OpenRa@1057 993157c7-ee19-0410-b2c4-bb4e9862e678

2007-06-21 03:20:47 +00:00
parent 765c0ac067
commit 3b1a1e3938
8 changed files with 409 additions and 6 deletions
--- a/ImageDecode/ShpReader.cs
+++ b/ImageDecode/ShpReader.cs
@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Drawing;
+using System.IO;
+
+namespace ImageDecode
+{
+	public class ImageHeader
+	{
+		public uint Offset;
+		public Format Format;
+		public uint RefOffset;
+		public Format RefFormat;
+		public byte[] Image;
+
+		public ImageHeader( BinaryReader reader )
+		{
+			Offset = reader.ReadUInt32();
+			Format = (Format)( Offset >> 24 );
+			Offset &= 0xFFFFFF;
+
+			RefOffset = reader.ReadUInt16();
+			RefFormat = (Format)reader.ReadUInt16();
+		}
+	}
+
+	public enum Format
+	{
+		Format20 = 0x20,
+		Format40 = 0x40,
+		Format80 = 0x80,
+	}
+
+	public static class ShpReader
+	{
+		public static IEnumerable<byte[]> Read( Stream stream )
+		{
+			BinaryReader reader = new BinaryReader( stream );
+
+			ushort numImages = reader.ReadUInt16();
+			reader.ReadUInt16();
+			reader.ReadUInt16();
+			ushort width = reader.ReadUInt16();
+			ushort height = reader.ReadUInt16();
+			reader.ReadUInt32();
+
+			List<ImageHeader> headers = new List<ImageHeader>();
+			for( int i = 0 ; i < numImages ; i++ )
+				headers.Add( new ImageHeader( reader ) );
+
+			new ImageHeader( reader ); // end-of-file header
+			new ImageHeader( reader ); // all-zeroes header
+
+			foreach( ImageHeader h in headers )
+			{
+				reader.BaseStream.Position = h.Offset;
+				switch( h.Format )
+				{
+					case Format.Format20:
+						//throw new NotImplementedException();
+						break;
+					case Format.Format40:
+						//throw new NotImplementedException();
+						break;
+					case Format.Format80:
+						{
+							byte[] compressedBytes = reader.ReadBytes( (int)( reader.BaseStream.Length - reader.BaseStream.Position ) );
+							MemoryStream ms = new MemoryStream( compressedBytes );
+							byte[] imageBytes = new byte[ width * height ];
+							Format80.DecodeInto( ms, imageBytes );
+							h.Image = imageBytes;
+							break;
+						}
+					default:
+						throw new InvalidDataException();
+				}
+
+				if( h.Image != null )
+					yield return h.Image;
+			}
+		}
+	}
+}