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using Avalonia.Media;
using DynamicData;
using LibHac.Common;
using LibHac.Fs;
using LibHac.Fs.Fsa;
using LibHac.FsSystem;
using LibHac.Ncm;
using LibHac.Tools.Fs;
using LibHac.Tools.FsSystem;
using LibHac.Tools.FsSystem.NcaUtils;
using Ryujinx.Ava.UI.Models;
using Ryujinx.HLE.FileSystem;
using SixLabors.ImageSharp;
using SixLabors.ImageSharp.Formats.Png;
using SixLabors.ImageSharp.PixelFormats;
using SixLabors.ImageSharp.Processing;
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Color = Avalonia.Media.Color;
namespace Ryujinx.Ava.UI.ViewModels
{
internal class AvatarProfileViewModel : BaseModel, IDisposable
{
private const int MaxImageTasks = 4;
private static readonly Dictionary<string, byte[]> _avatarStore = new();
private static bool _isPreloading;
private static Action _loadCompleteAction;
private ObservableCollection<ProfileImageModel> _images;
private Color _backgroundColor = Colors.White;
private int _selectedIndex;
private int _imagesLoaded;
private bool _isActive;
private byte[] _selectedImage;
private bool _isIndeterminate = true;
public bool IsActive
{
get => _isActive;
set => _isActive = value;
}
public AvatarProfileViewModel()
{
_images = new ObservableCollection<ProfileImageModel>();
}
public AvatarProfileViewModel(Action loadCompleteAction)
{
_images = new ObservableCollection<ProfileImageModel>();
if (_isPreloading)
{
_loadCompleteAction = loadCompleteAction;
}
else
{
ReloadImages();
}
}
public Color BackgroundColor
{
get => _backgroundColor;
set
{
_backgroundColor = value;
IsActive = false;
ReloadImages();
}
}
public ObservableCollection<ProfileImageModel> Images
{
get => _images;
set
{
_images = value;
OnPropertyChanged();
}
}
public bool IsIndeterminate
{
get => _isIndeterminate;
set
{
_isIndeterminate = value;
OnPropertyChanged();
}
}
public int ImageCount => _avatarStore.Count;
public int ImagesLoaded
{
get => _imagesLoaded;
set
{
_imagesLoaded = value;
OnPropertyChanged();
}
}
public int SelectedIndex
{
get => _selectedIndex;
set
{
_selectedIndex = value;
if (_selectedIndex == -1)
{
SelectedImage = null;
}
else
{
SelectedImage = _images[_selectedIndex].Data;
}
OnPropertyChanged();
}
}
public byte[] SelectedImage
{
get => _selectedImage;
private set => _selectedImage = value;
}
public void ReloadImages()
{
if (_isPreloading)
{
IsIndeterminate = false;
return;
}
Task.Run(() =>
{
IsActive = true;
Images.Clear();
int selectedIndex = _selectedIndex;
int index = 0;
ImagesLoaded = 0;
IsIndeterminate = false;
var keys = _avatarStore.Keys.ToList();
var newImages = new List<ProfileImageModel>();
var tasks = new List<Task>();
for (int i = 0; i < MaxImageTasks; i++)
{
var start = i;
tasks.Add(Task.Run(() => ImageTask(start)));
}
Task.WaitAll(tasks.ToArray());
Images.AddRange(newImages);
void ImageTask(int start)
{
for (int i = start; i < keys.Count; i += MaxImageTasks)
{
if (!IsActive)
{
return;
}
var key = keys[i];
var image = _avatarStore[keys[i]];
var data = ProcessImage(image);
newImages.Add(new ProfileImageModel(key, data));
if (index++ == selectedIndex)
{
SelectedImage = data;
}
Interlocked.Increment(ref _imagesLoaded);
OnPropertyChanged(nameof(ImagesLoaded));
}
}
});
}
private byte[] ProcessImage(byte[] data)
{
using (MemoryStream streamJpg = new())
{
Image avatarImage = Image.Load(data, new PngDecoder());
avatarImage.Mutate(x => x.BackgroundColor(new Rgba32(BackgroundColor.R,
BackgroundColor.G,
BackgroundColor.B,
BackgroundColor.A)));
avatarImage.SaveAsJpeg(streamJpg);
return streamJpg.ToArray();
}
}
public static void PreloadAvatars(ContentManager contentManager, VirtualFileSystem virtualFileSystem)
{
try
{
if (_avatarStore.Count > 0)
{
return;
}
_isPreloading = true;
string contentPath =
contentManager.GetInstalledContentPath(0x010000000000080A, StorageId.BuiltInSystem,
NcaContentType.Data);
string avatarPath = virtualFileSystem.SwitchPathToSystemPath(contentPath);
if (!string.IsNullOrWhiteSpace(avatarPath))
{
using (IStorage ncaFileStream = new LocalStorage(avatarPath, FileAccess.Read, FileMode.Open))
{
Nca nca = new(virtualFileSystem.KeySet, ncaFileStream);
IFileSystem romfs = nca.OpenFileSystem(NcaSectionType.Data, IntegrityCheckLevel.ErrorOnInvalid);
foreach (DirectoryEntryEx item in romfs.EnumerateEntries())
{
// TODO: Parse DatabaseInfo.bin and table.bin files for more accuracy.
if (item.Type == DirectoryEntryType.File && item.FullPath.Contains("chara") &&
item.FullPath.Contains("szs"))
{
using var file = new UniqueRef<IFile>();
romfs.OpenFile(ref file.Ref(), ("/" + item.FullPath).ToU8Span(), OpenMode.Read)
.ThrowIfFailure();
using (MemoryStream stream = new())
using (MemoryStream streamPng = new())
{
file.Get.AsStream().CopyTo(stream);
stream.Position = 0;
Image avatarImage = Image.LoadPixelData<Rgba32>(DecompressYaz0(stream), 256, 256);
avatarImage.SaveAsPng(streamPng);
_avatarStore.Add(item.FullPath, streamPng.ToArray());
}
}
}
}
}
}
finally
{
_isPreloading = false;
_loadCompleteAction?.Invoke();
}
}
private static byte[] DecompressYaz0(Stream stream)
{
using (BinaryReader reader = new(stream))
{
reader.ReadInt32(); // Magic
uint decodedLength = BinaryPrimitives.ReverseEndianness(reader.ReadUInt32());
reader.ReadInt64(); // Padding
byte[] input = new byte[stream.Length - stream.Position];
stream.Read(input, 0, input.Length);
uint inputOffset = 0;
byte[] output = new byte[decodedLength];
uint outputOffset = 0;
ushort mask = 0;
byte header = 0;
while (outputOffset < decodedLength)
{
if ((mask >>= 1) == 0)
{
header = input[inputOffset++];
mask = 0x80;
}
if ((header & mask) != 0)
{
if (outputOffset == output.Length)
{
break;
}
output[outputOffset++] = input[inputOffset++];
}
else
{
byte byte1 = input[inputOffset++];
byte byte2 = input[inputOffset++];
uint dist = (uint)((byte1 & 0xF) << 8) | byte2;
uint position = outputOffset - (dist + 1);
uint length = (uint)byte1 >> 4;
if (length == 0)
{
length = (uint)input[inputOffset++] + 0x12;
}
else
{
length += 2;
}
uint gap = outputOffset - position;
uint nonOverlappingLength = length;
if (nonOverlappingLength > gap)
{
nonOverlappingLength = gap;
}
Buffer.BlockCopy(output, (int)position, output, (int)outputOffset, (int)nonOverlappingLength);
outputOffset += nonOverlappingLength;
position += nonOverlappingLength;
length -= nonOverlappingLength;
while (length-- > 0)
{
output[outputOffset++] = output[position++];
}
}
}
return output;
}
}
public void Dispose()
{
_loadCompleteAction = null;
IsActive = false;
}
}
}
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