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Initial support for uncompressed TVPaint DEEP images
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Diff for: ‎ImageFormats/DeepReader.cs

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using MechanikaDesign.ImageFormats;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.IO;
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using System.Text;
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/*
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Decoder for IFF (FORM-based) images.
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Copyright 2013-2023 by Warren Galyen
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https://www.mechanikadesign.com
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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namespace Mechanika.ImageFormats
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{
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/// <summary>
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/// Handles reading TVPaint DEEP images.
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/// </summary>
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public static class DeepReader
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{
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/// <summary>
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/// Reads an DEEP image from a file.
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/// </summary>
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/// <param name="fileName">Name of the file to read.</param>
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/// <returns>Bitmap that contains the image that was read.</returns>
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public static Bitmap Load(string fileName)
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{
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using (var f = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read))
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{
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return Load(f);
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}
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}
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public static Bitmap Load(Stream stream)
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{
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int imgWidth = -1;
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int imgHeight = -1;
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int numElements = 0;
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int[] elementTypes = new int[16];
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int[] elementSizes = new int[16];
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int compressionType = 0;
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int[] tvdcTable = new int[16];
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byte[] bodyChunk = null;
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BinaryReader reader = new BinaryReader(stream);
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byte[] tempBytes = new byte[65536];
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stream.Read(tempBytes, 0, 4);
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if (Encoding.ASCII.GetString(tempBytes, 0, 4) != "FORM") { throw new ApplicationException("This is not a valid DEEP file."); }
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uint chunkSize = Util.BigEndian(reader.ReadUInt32());
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stream.Read(tempBytes, 0, 4);
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string fileType = Encoding.ASCII.GetString(tempBytes, 0, 4);
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if (fileType != "DEEP") { throw new ApplicationException("This is not a valid DEEP file."); }
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byte[] palette = null;
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var rowPalette = new List<byte[]>();
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while (stream.Position < stream.Length)
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{
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stream.Read(tempBytes, 0, 4);
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string chunkName = Encoding.ASCII.GetString(tempBytes, 0, 4);
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chunkSize = Util.BigEndian(reader.ReadUInt32());
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if (chunkName == "DBOD")
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{
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bodyChunk = new byte[chunkSize];
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stream.Read(bodyChunk, 0, (int)chunkSize);
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break;
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}
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if (chunkSize <= tempBytes.Length)
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{
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stream.Read(tempBytes, 0, (int)chunkSize);
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}
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else
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{
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stream.Seek(chunkSize, SeekOrigin.Current);
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}
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if (chunkName == "DGBL")
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{
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if (imgWidth <= 0) imgWidth = Util.BigEndian(BitConverter.ToUInt16(tempBytes, 0));
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if (imgHeight <= 0) imgHeight = Util.BigEndian(BitConverter.ToUInt16(tempBytes, 2));
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compressionType = Util.BigEndian(BitConverter.ToUInt16(tempBytes, 4));
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// last 2 bytes are xAspect, yAspect.
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}
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else if (chunkName == "DLOC")
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{
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imgWidth = Util.BigEndian(BitConverter.ToUInt16(tempBytes, 0));
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imgHeight = Util.BigEndian(BitConverter.ToUInt16(tempBytes, 2));
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// last 4 bytes are xLocation, yLocation.
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}
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else if (chunkName == "DPEL")
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{
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numElements = (int)Util.BigEndian(BitConverter.ToUInt32(tempBytes, 0));
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int ptr = 4;
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for (int i = 0; i < numElements; i++)
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{
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elementTypes[i] = Util.BigEndian(BitConverter.ToUInt16(tempBytes, ptr)); ptr += 2;
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elementSizes[i] = Util.BigEndian(BitConverter.ToUInt16(tempBytes, ptr)); ptr += 2;
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}
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}
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else if (chunkName == "TVDC" && chunkSize >= 32)
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{
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for (int i = 0; i < 16; i++)
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{
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tvdcTable[i] = (short)Util.BigEndian(BitConverter.ToUInt16(tempBytes, i * 2));
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}
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}
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}
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if (imgWidth == -1 || imgHeight == -1)
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{
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throw new ApplicationException("Invalid format of DEEP file.");
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}
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byte[] bmpData = new byte[(imgWidth + 1) * 4 * imgHeight];
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try
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{
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if (compressionType == 0)
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{
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int ptr = 0;
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for (int y = 0; y < imgHeight; y++)
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{
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for (int x = 0; x < imgWidth; x++)
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{
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if (numElements == 3)
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{
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bmpData[4 * (y * imgWidth + x) + 2] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x) + 1] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x)] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x) + 3] = 0xFF;
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}
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else if (numElements == 4)
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{
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bmpData[4 * (y * imgWidth + x) + 2] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x) + 1] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x)] = bodyChunk[ptr++];
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bmpData[4 * (y * imgWidth + x) + 3] = bodyChunk[ptr++];
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}
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}
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}
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}
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else if (compressionType == 5)
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{
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int scanLineSize = imgWidth;
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byte[] uncompressed = new byte[bmpData.Length * 2];
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int pos = 0;
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for (int y = 0; y < imgHeight; y++)
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{
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int d;
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int v = 0;
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for (int i = 0; i < scanLineSize; i++)
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{
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d = bodyChunk[pos >> 1];
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if ((pos++ & 0x1) != 0) d &= 0xF;
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else d >>= 4;
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v += tvdcTable[d];
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uncompressed[i] = (byte)v;
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if (tvdcTable[d] == 0)
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{
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d = bodyChunk[pos >> 1];
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if ((pos++ & 0x1) != 0) d &= 0xf;
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else d >>= 4;
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while (d-- > 0) uncompressed[++i] = (byte)v;
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}
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}
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pos = (pos + 1) / 2;
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int xx = 0;
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for (int x = 0; x < imgWidth; x++)
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{
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bmpData[4 * (y * imgWidth + x)] = uncompressed[xx];
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bmpData[4 * (y * imgWidth + x) + 1] = uncompressed[xx];
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bmpData[4 * (y * imgWidth + x) + 2] = uncompressed[xx];
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bmpData[4 * (y * imgWidth + x) + 3] = 0xFF;
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xx++;
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}
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}
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}
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}
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catch (Exception e)
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{
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// return a partial image in case of unexpected EOF
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Util.log("Error while processing DEEP file: " + e.Message);
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}
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var bmp = new Bitmap(imgWidth, imgHeight, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
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System.Drawing.Imaging.BitmapData bmpBits = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
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System.Runtime.InteropServices.Marshal.Copy(bmpData, 0, bmpBits.Scan0, imgWidth * 4 * imgHeight);
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bmp.UnlockBits(bmpBits);
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return bmp;
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}
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}
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}

Diff for: ‎ImageFormats/ImageFormats.csproj

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@@ -48,6 +48,7 @@
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</ItemGroup>
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<ItemGroup>
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<Compile Include="DdsReader.cs" />
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<Compile Include="DeepReader.cs" />
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<Compile Include="FitsReader.cs" />
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<Compile Include="FormMain.cs">
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<SubType>Form</SubType>

Diff for: ‎ImageFormats/Picture.cs

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@@ -104,6 +104,11 @@ public static Bitmap Load(Stream stream)
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{
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bmp = IlbmReader.Load(stream);
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}
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else if ((header[0] == 'F') && (header[1] == 'O') && (header[2] == 'R') && (header[3] == 'M')
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&& (header[8] == 'D') && (header[9] == 'E') && (header[10] == 'E') && (header[11] == 'P'))
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{
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bmp = DeepReader.Load(stream);
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}
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else if ((header[0] == 'S') && (header[1] >= 'I') && (header[2] >= 'M') && (header[3] >= 'P'))
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{
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bmp = FitsReader.Load(stream);

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