(Artemis): Implement NekoNyan PNG image format

ArcFormats/ArcFormats.csproj

@@ -123,6 +123,7 @@
     <Compile Include="AdvSys\ImageGWD.cs" />
     <Compile Include="Ail\ArcLNK2.cs" />
     <Compile Include="AIRNovel\ArcAIR.cs" />
+    <Compile Include="Artemis\ImageNekoPNG.cs" />
     <Compile Include="CsWare\AudioWAV.cs" />
     <Compile Include="CsWare\ImageGDT.cs" />
     <Compile Include="FC01\ArcBDT.cs" />

ArcFormats/Artemis/ImageNekoPNG.cs

@@ -0,0 +1,165 @@
+//! \file       ImageNekoPNG.cs
+//! \date       Sun Nov 19 15:40:46 2023
+//! \brief      NekoNyan PNG image format.
+//
+// Copyright (C) 2016 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;
+using System.ComponentModel;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Windows.Media.Imaging;
+using System.Windows.Media;
+using System.Windows;
+
+namespace GameRes.Formats.Artemis
+{
+    internal class NekoPNGMetaData : ImageMetaData
+    {
+        public int[] Offset;
+        public int[] Length;
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class ImageNekoPNG : ImageFormat
+    {
+        public override string         Tag { get { return "PNG"; } }
+        public override string Description { get { return "NekoNyan PNG image format"; } }
+        public override uint     Signature { get { return 0x00000040; } }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var metadata = (NekoPNGMetaData)info;
+            var bitmap = new WriteableBitmap ((int)info.Width, (int)info.Height, ImageData.DefaultDpiX, ImageData.DefaultDpiY, PixelFormats.Bgra32, null);
+            bitmap.Lock ();
+            try
+            {
+                var output = bitmap.BackBuffer;
+                int stride = bitmap.BackBufferStride;
+                for (var i = 0; i < 8; i++)
+                {
+                    file.Position = metadata.Offset[i];
+                    var data = file.ReadBytes (metadata.Length[i]);
+                    for (var j = 0; j < 16; j++)
+                        data[j] -= (byte)(0x77 * j);
+                    var slice_width = 0;
+                    var slice_height = 0;
+                    if (1 != WebPGetInfo (data, (UIntPtr)data.Length, ref slice_width, ref slice_height))
+                        throw new InvalidFormatException("WebP image decoder failed.");
+                    var slice_size = stride * slice_height;
+                    if (IntPtr.Zero == WebPDecodeBGRAInto (data, (UIntPtr)data.Length, output, (UIntPtr)slice_size, stride))
+                        throw new InvalidFormatException("WebP image decoder failed.");
+                    output += slice_size;
+                }
+                bitmap.AddDirtyRect (new Int32Rect(0, 0, (int)info.Width, (int)info.Height));
+            }
+            finally
+            {
+                bitmap.Unlock();
+            }
+            bitmap.Freeze();
+            return new ImageData (bitmap, info);
+        }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            if (file.Signature != 0x40)
+                return null;
+            if (file.Length <= 0x40)
+                return null;
+            var offset = new int[8];
+            var length = new int[8];
+            for (var i = 0; i < 8; i++)
+                offset[i] = file.ReadInt32();
+            for (var i = 0; i < 8; i++)
+                length[i] = file.ReadInt32();
+            LibWebPLoader.Load();
+            var image_width = 0;
+            var image_height = 0;
+            for (var i = 0; i < 8; i++)
+            {
+                if (offset[i] < 64)
+                    return null;
+                if (length[i] < 32)
+                    return null;
+                if (offset[i] + length[i] > file.Length)
+                    return null;
+                file.Position = offset[i];
+                var webp_header = file.ReadBytes (32);
+                for (var j = 0; j < 16; j++)
+                    webp_header[j] -= (byte)(0x77 * j);
+                var slice_width = 0;
+                var slice_height = 0;
+                if (1 != WebPGetInfo (webp_header, (UIntPtr)webp_header.Length, ref slice_width, ref slice_height))
+                    throw new InvalidFormatException ("WebP image decoder failed.");
+                image_width = Math.Max (image_width, slice_width);
+                image_height += slice_height;
+            }
+            return new NekoPNGMetaData
+            {
+                Width = (uint)image_width,
+                Height = (uint)image_height,
+                BPP = 32,
+                Offset = offset,
+                Length = length,
+            };
+        }
+
+        public override void Write (Stream file, ImageData bitmap)
+        {
+            throw new NotImplementedException("ImageNekoPNG.Write not implemented");
+        }
+
+        [DllImport("libwebp.dll", EntryPoint = "WebPGetInfo", CallingConvention = CallingConvention.Cdecl)]
+        public static extern int WebPGetInfo ([MarshalAs(UnmanagedType.LPArray)] byte[] data, UIntPtr data_size, ref int width, ref int height);
+
+        [DllImport("libwebp.dll", EntryPoint = "WebPDecodeBGRAInto", CallingConvention = CallingConvention.Cdecl)]
+        public static extern IntPtr WebPDecodeBGRAInto ([MarshalAs(UnmanagedType.LPArray)] byte[] data, UIntPtr data_size, IntPtr output_buffer, UIntPtr output_buffer_size, int output_stride);
+    }
+
+    internal static class LibWebPLoader
+    {
+        [DllImport("kernel32.dll", SetLastError = true, CallingConvention = CallingConvention.StdCall)]
+        static extern IntPtr LoadLibraryEx (string lpFileName, IntPtr hReservedNull, uint dwFlags);
+
+        static bool loaded = false;
+
+        const uint LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR = 0x00000100;
+        const uint LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800;
+
+        public static void Load ()
+        {
+            if (loaded)
+                return;
+            var folder = Path.GetDirectoryName (Assembly.GetExecutingAssembly().Location);
+            folder = Path.Combine (folder, (IntPtr.Size == 4) ? "x86" : "x64");
+            var fullPath = Path.Combine (folder, "libwebp.dll");
+            fullPath = Path.GetFullPath (fullPath);
+            var handle = LoadLibraryEx (fullPath, IntPtr.Zero, LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR | LOAD_LIBRARY_SEARCH_SYSTEM32);
+            if (IntPtr.Zero == handle)
+                throw new Win32Exception (Marshal.GetLastWin32Error());
+            loaded = true;
+        }
+    }
+}