implemented D.O.'s VRS, GGA and GGS images.

ArcFormats/Ikura/ImageGGS.cs

@@ -0,0 +1,140 @@
+//! \file       ImageGGS.cs
+//! \date       2018 Jan 16
+//! \brief      D.O. compressed image format.
+//
+// Copyright (C) 2018 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.Ikura
+{
+    [Export(typeof(ImageFormat))]
+    public class GgsFormat : ImageFormat
+    {
+        public override string         Tag { get { return "GGS"; } }
+        public override string Description { get { return "D.O. image format"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (!file.Name.HasExtension (".ggs"))
+                return null;
+            int x = file.ReadInt16();
+            int y = file.ReadInt16();
+            uint w = file.ReadUInt16();
+            uint h = file.ReadUInt16();
+            if (0 == w || 0 == h || w > 0x4000 || h > 0x4000 || x < 0 || y < 0)
+                return null;
+            return new ImageMetaData { Width = w, Height = h, OffsetX = x, OffsetY = y, BPP = 24 };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var reader = new GgsReader (file, info);
+            var pixels = reader.Unpack();
+            return ImageData.Create (info, reader.Format, null, pixels);
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("GgsFormat.Write not implemented");
+        }
+    }
+
+    internal class GgsReader
+    {
+        IBinaryStream       m_input;
+        byte[]              m_output;
+
+        public PixelFormat Format { get { return PixelFormats.Bgr24; } }
+
+        public GgsReader (IBinaryStream input, ImageMetaData info)
+        {
+            m_input = input;
+            m_output = new byte[3 * info.Width * info.Height];
+        }
+
+        public byte[] Unpack ()
+        {
+            m_input.Position = 8;
+            for (int channel = 0; channel < 3; ++channel)
+            {
+                int dst = channel;
+                while (dst < m_output.Length)
+                {
+                    int count;
+                    byte ctl = m_input.ReadUInt8();
+                    if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        byte v = m_input.ReadUInt8();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = v;
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        int offset = m_input.ReadUInt8();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_output[dst-offset];
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        count = m_input.ReadUInt8();
+                        int offset = m_input.ReadUInt16();
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_output[dst-offset];
+                            dst += 3;
+                        }
+                    }
+                    else if (0 == ctl--)
+                    {
+                        dst += m_input.ReadUInt8();
+                    }
+                    else if (0 == ctl)
+                    {
+                        dst += m_input.ReadUInt16();
+                    }
+                    else
+                    {
+                        count = ctl;
+                        while (count --> 0)
+                        {
+                            m_output[dst] = m_input.ReadUInt8();
+                            dst += 3;
+                        }
+                    }
+                }
+            }
+            return m_output;
+        }
+    }
+}