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Merged
crskycode merged 1 commit into from
Apr 12, 2026
Merged

Support YuRis ImageYDG #184

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1 change: 1 addition & 0 deletions ArcFormats/ArcFormats.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -280,6 +280,7 @@
<Compile Include="VnMaker\ImagePNG.cs" />
<Compile Include="Xuse\ArcNT.cs" />
<Compile Include="Xuse\ArcWVB.cs" />
<Compile Include="YuRis\ImageYDG.cs" />
<Compile Include="Zyx\ImageXMG.cs" />
<Compile Include="AudioAIFF.cs" />
<Compile Include="Basil\ArcMIF.cs" />
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359 changes: 359 additions & 0 deletions ArcFormats/YuRis/ImageYDG.cs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,359 @@
//! \file ImageYDG.cs
//! \date Sun Apr 12 15:08:10 2026
//! \brief YU-RIS compressed image.
//
// Copyright (C) 2026 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;
using GameRes.Utility;

namespace GameRes.Formats.YuRis
{
internal class YdgMetaData : ImageMetaData
{
public int HeaderLength;
}

internal class YdgTile
{
public uint Offset;
public uint Size;
public ushort X;
public ushort Height;
}

[Export(typeof(ImageFormat))]
public class YdgFormat : ImageFormat
{
public override string Tag { get { return "YDG"; } }
public override string Description { get { return "YU-RIS compressed image format"; } }
public override uint Signature { get { return 0x00474459; } } // 'YDG\0'

public YdgFormat()
{
Extensions = new string[] { "ydg" };
}

public override ImageMetaData ReadMetaData (IBinaryStream stream)
{
var header = stream.ReadHeader (0x30);
if (!header.AsciiEqual ("YDG\0"))
return null;
if (!header.AsciiEqual (4, "YU-RIS"))
return null;

return new YdgMetaData
{
Width = header.ToUInt16 (0x20),
Height = header.ToUInt16 (0x22),
BPP = 32,
HeaderLength = header.ToInt32 (0x10),
};
}

public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
var reader = new YdgReader(stream, (YdgMetaData)info);
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}

public override void Write (Stream file, ImageData image)
{
throw new NotImplementedException ("YdgFormat.Write not implemented");
}
}

internal sealed class YdgReader
{
IBinaryStream m_input;
YdgMetaData m_info;

public PixelFormat Format { get; private set; }
public byte[] Data { get { return m_output; } }

public YdgReader(IBinaryStream input, YdgMetaData info)
{
m_input = input;
m_info = info;
m_output = new byte[4 * (int)info.Width * (int)info.Height];
Format = PixelFormats.Bgra32;
}
byte[] m_output;

public void Unpack ()
{
var tiles = ReadIndex ();
int width = (int)m_info.Width;
int height = (int)m_info.Height;
int dst_y = 0;
foreach (var tile in tiles)
{
byte[] pixels = ReadTile (tile, out width, out height);

int tile_height = Math.Min(height, tile.Height);
CopyTile (pixels, width, tile_height, tile.X, dst_y);
dst_y += tile_height;
if (dst_y >= m_info.Height)
break;
}
}

YdgTile[] ReadIndex ()
{
m_input.Position = m_info.HeaderLength;
int tileCount = m_input.ReadInt32();
var dir = new YdgTile[tileCount];
for (int i = 0; i < dir.Length; ++i)
{
dir[i] = new YdgTile
{
Offset = m_input.ReadUInt32(),
Size = m_input.ReadUInt32(),
X = m_input.ReadUInt16(),
Height = m_input.ReadUInt16(),
};
m_input.ReadUInt32();
}
return dir;
}

byte[] ReadTile (YdgTile tile, out int width, out int height)
{
m_input.Position = tile.Offset;
var data = m_input.ReadBytes ((int)tile.Size);
if (Binary.AsciiEqual (data, 0, "RIFF") && Binary.AsciiEqual (data, 8, "WEBP"))
return DecodeWebP (data, out width, out height);
return DecodeQoi (data, out width, out height);
}

void CopyTile (byte[] pixels, int src_width, int src_height, int dst_x, int dst_y)
{
int copy_width = Math.Min (src_width, (int)m_info.Width - dst_x);
int copy_height = Math.Min (src_height, (int)m_info.Height - dst_y);
if (copy_width <= 0 || copy_height <= 0)
return;

int src_stride = src_width * 4;
int dst_stride = (int)m_info.Width * 4;
int dst = dst_y * dst_stride + dst_x * 4;
int row_bytes = copy_width * 4;
int src = 0;
for (int y = 0; y < copy_height; ++y)
{
Buffer.BlockCopy (pixels, src, m_output, dst, row_bytes);
src += src_stride;
dst += dst_stride;
}
}

byte[] DecodeWebP (byte[] data, out int width, out int height)
{
LibWebPLoader.Load ();

width = 0;
height = 0;
if (1 != WebPGetInfo (data, (UIntPtr)data.Length, ref width, ref height))
throw new InvalidFormatException ("WebP image decoder failed.");

int stride = width * 4;
var output = new byte[stride * height];
var handle = GCHandle.Alloc (output, GCHandleType.Pinned);
try
{
if (IntPtr.Zero == WebPDecodeBGRAInto (data, (UIntPtr)data.Length,
handle.AddrOfPinnedObject (), (UIntPtr)output.Length, stride))
{
throw new InvalidFormatException ("WebP image decoder failed.");
}
}
finally
{
handle.Free ();
}
return output;
}

byte[] DecodeQoi(byte[] data, out int width, out int height)
{
using (var input = new BinMemoryStream(data))
{
if (0x66696F71 != input.ReadInt32()) // "qoif"
throw new InvalidFormatException ("Invalid QOI signature");

width = (int)Binary.BigEndian(input.ReadUInt32());
height = (int)Binary.BigEndian(input.ReadUInt32());
int channels = input.ReadByte();
int colorspace = input.ReadByte();
var count = 4 * width * height;
var output = new byte[count];
var qoi = new QoiDecodeStream(input);
uint pixel = 0;
var run = 0;
var dst = 0;
while (dst < count)
{
if (run > 1)
--run;
else
{
run = qoi.Read (out pixel);
}
output[dst ] = (byte)pixel;
output[dst + 1] = (byte)(pixel >> 8);
output[dst + 2] = (byte)(pixel >> 16);
output[dst + 3] = (byte)(pixel >> 24);
dst += 4;
}
return output;
}
}

static class QoiCodec
{
public const int Index = 0x00;
public const int Diff = 0x40;
public const int Luma = 0x80;
public const int Run = 0xC0;
public const int Rgb = 0xFE;
public const int Rgba = 0xFF;
public const int Mask2 = 0xC0;
public const int HashTableSize = 64;
}

class QoiDecodeStream
{
readonly IBinaryStream m_input;
readonly byte[] m_table;
uint m_pixel;

public QoiDecodeStream(IBinaryStream input)
{
m_input = input;
m_table = new byte[4 * QoiCodec.HashTableSize];
m_pixel = 0xFF000000;
}

public int Read(out uint output)
{
var r = (byte)m_pixel;
var g = (byte)(m_pixel >> 8);
var b = (byte)(m_pixel >> 16);
var a = (byte)(m_pixel >> 24);
var run = 1;
var b1 = m_input.ReadByte();
if (-1 == b1)
throw new EndOfStreamException();

if (QoiCodec.Rgb == b1)
{
var rgb = m_input.ReadInt24();
r = (byte)rgb;
g = (byte)(rgb >> 8);
b = (byte)(rgb >> 16);
}
else if (QoiCodec.Rgba == b1)
{
var rgba = m_input.ReadInt32();
r = (byte)rgba;
g = (byte)(rgba >> 8);
b = (byte)(rgba >> 16);
a = (byte)(rgba >> 24);
}
else if (QoiCodec.Index == (b1 & QoiCodec.Mask2))
{
var p1 = (b1 & ~QoiCodec.Mask2) * 4;
r = m_table[p1];
g = m_table[p1 + 1];
b = m_table[p1 + 2];
a = m_table[p1 + 3];
}
else if (QoiCodec.Diff == (b1 & QoiCodec.Mask2))
{
r += (byte)(((b1 >> 4) & 0x03) - 2);
g += (byte)(((b1 >> 2) & 0x03) - 2);
b += (byte)((b1 & 0x03) - 2);
}
else if (QoiCodec.Luma == (b1 & QoiCodec.Mask2))
{
var b2 = m_input.ReadByte();
if (-1 == b2)
throw new EndOfStreamException();
var vg = (b1 & 0x3F) - 32;
r += (byte)(vg - 8 + ((b2 >> 4) & 0x0F));
g += (byte)vg;
b += (byte)(vg - 8 + (b2 & 0x0F));
}
else if (QoiCodec.Run == (b1 & QoiCodec.Mask2))
{
run = (b1 & 0x3F) + 1;
}

var p2 = (r * 3 + g * 5 + b * 7 + a * 11) % QoiCodec.HashTableSize * 4;
m_table[p2 ] = r;
m_table[p2 + 1] = g;
m_table[p2 + 2] = b;
m_table[p2 + 3] = a;
m_pixel = (uint)(r | (g << 8) | (b << 16) | (a << 24));
output = (uint)(b | (g << 8) | (r << 16) | (a << 24));
return run;
}
}

[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;
}
}
}
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