implemented AI6WIN ARC archives and AKB images.

ArcFormats/Silky/ImageAKB.cs

@@ -0,0 +1,139 @@
+//! \file       ImageAKB.cs
+//! \date       Sat Nov 28 13:09:20 2015
+//! \brief      Ai6Win engine image format.
+//
+// Copyright (C) 2015 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 GameRes.Compression;
+using GameRes.Utility;
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+
+namespace GameRes.Formats.Silky
+{
+    internal class AkbMetaData : ImageMetaData
+    {
+        public byte[]   Background;
+        public int      InnerWidth;
+        public int      InnerHeight;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class AkbFormat : ImageFormat
+    {
+        public override string         Tag { get { return "AKB"; } }
+        public override string Description { get { return "AI6WIN engine image format"; } }
+        public override uint     Signature { get { return 0x20424B41; } } // 'AKB '
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            using (var reader = new ArcView.Reader (stream))
+            {
+                reader.ReadInt32();
+                var info = new AkbMetaData();
+                info.Width = reader.ReadUInt16();
+                info.Height = reader.ReadUInt16();
+                int flags = reader.ReadInt32() & 0xFFFF;
+                info.BPP = 0 == flags ? 32 : 24;
+                info.Background = reader.ReadBytes (4);
+                info.OffsetX = reader.ReadInt32();
+                info.OffsetY = reader.ReadInt32();
+                info.InnerWidth = reader.ReadInt32() - info.OffsetX;
+                info.InnerHeight = reader.ReadInt32() - info.OffsetY;
+                if (info.InnerWidth > info.Width || info.InnerHeight > info.Height)
+                    return null;
+                return info;
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            var meta = (AkbMetaData)info;
+            int pixel_size = meta.BPP / 8;
+            int stride = (int)meta.Width * pixel_size;
+            byte[] image;
+            if (meta.InnerWidth != 0 && meta.InnerHeight != 0)
+            {
+                stream.Position = 0x20;
+                int inner_stride = meta.InnerWidth * pixel_size;
+                var pixels = new byte[meta.InnerHeight * inner_stride];
+                using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
+                {
+                    for (int dst = pixels.Length - inner_stride; dst >= 0; dst -= inner_stride)
+                    {
+                        if (inner_stride != lz.Read (pixels, dst, inner_stride))
+                            throw new InvalidFormatException();
+                    }
+                }
+                int src = 0;
+                for (int i = pixel_size; i < inner_stride; ++i)
+                    pixels[i] += pixels[src++];
+                src = 0;
+                for (int i = inner_stride; i < pixels.Length; ++i)
+                    pixels[i] += pixels[src++];
+                if (meta.InnerWidth != meta.Width || meta.InnerHeight != meta.Height)
+                {
+                    image = CreateBackground (meta);
+                    src = 0;
+                    int dst = meta.OffsetY * stride + meta.OffsetX * pixel_size;
+                    for (int y = 0; y < meta.InnerHeight; ++y)
+                    {
+                        Buffer.BlockCopy (pixels, src, image, dst, inner_stride);
+                        dst += stride;
+                        src += inner_stride;
+                    }
+                }
+                else
+                {
+                    image = pixels;
+                }
+            }
+            else
+            {
+                image = CreateBackground (meta);
+            }
+            var format = 24 == meta.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
+            return ImageData.Create (info, format, null, image, stride);
+        }
+
+        private byte[] CreateBackground (AkbMetaData info)
+        {
+            int pixel_size = info.BPP / 8;
+            int stride = (int)info.Width * pixel_size;
+            var pixels = new byte[stride * (int)info.Height];
+            if (0 != LittleEndian.ToInt32 (info.Background, 0))
+            {
+                for (int i = 0; i < stride; i += pixel_size)
+                    Buffer.BlockCopy (info.Background, 0, pixels, i, pixel_size);
+                Binary.CopyOverlapped (pixels, 0, stride, pixels.Length-stride);
+            }
+            return pixels;
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("AkbFormat.Write not implemented");
+        }
+    }
+}