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Ryujinx/Ryujinx.HLE/HOS/Services/Sdb/Pl/SharedFontManager.cs
Ac_K 5d08e9b495
hos: Cleanup the project (#2634)
* hos: Cleanup the project

Since a lot of changes has been done on the HOS project, there are some leftover here and there, or class just used in one service, things at wrong places, and more.
This PR fixes that, additionnally to that, I've realigned some vars because I though it make the code more readable.

* Address gdkchan feedback

* addresses Thog feedback

* Revert ElfSymbol
2021-09-15 01:24:49 +02:00

179 lines
No EOL
6.6 KiB
C#

using LibHac.Common;
using LibHac.Fs;
using LibHac.Fs.Fsa;
using LibHac.FsSystem;
using LibHac.FsSystem.NcaUtils;
using Ryujinx.HLE.Exceptions;
using Ryujinx.HLE.FileSystem;
using Ryujinx.HLE.FileSystem.Content;
using Ryujinx.HLE.HOS.Kernel.Memory;
using Ryujinx.HLE.HOS.Services.Sdb.Pl.Types;
using System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.IO;
namespace Ryujinx.HLE.HOS.Services.Sdb.Pl
{
class SharedFontManager
{
private static readonly uint FontKey = 0x06186249;
private static readonly uint BFTTFMagic = 0x18029a7f;
private readonly Switch _device;
private readonly SharedMemoryStorage _storage;
private struct FontInfo
{
public int Offset;
public int Size;
public FontInfo(int offset, int size)
{
Offset = offset;
Size = size;
}
}
private Dictionary<SharedFontType, FontInfo> _fontData;
public SharedFontManager(Switch device, SharedMemoryStorage storage)
{
_device = device;
_storage = storage;
}
public void Initialize()
{
_fontData?.Clear();
_fontData = null;
}
public void EnsureInitialized(ContentManager contentManager)
{
if (_fontData == null)
{
_storage.ZeroFill();
uint fontOffset = 0;
FontInfo CreateFont(string name)
{
if (contentManager.TryGetFontTitle(name, out ulong fontTitle) && contentManager.TryGetFontFilename(name, out string fontFilename))
{
string contentPath = contentManager.GetInstalledContentPath(fontTitle, StorageId.NandSystem, NcaContentType.Data);
string fontPath = _device.FileSystem.SwitchPathToSystemPath(contentPath);
if (!string.IsNullOrWhiteSpace(fontPath))
{
byte[] data;
using (IStorage ncaFileStream = new LocalStorage(fontPath, FileAccess.Read, FileMode.Open))
{
Nca nca = new Nca(_device.System.KeySet, ncaFileStream);
IFileSystem romfs = nca.OpenFileSystem(NcaSectionType.Data, _device.System.FsIntegrityCheckLevel);
romfs.OpenFile(out IFile fontFile, ("/" + fontFilename).ToU8Span(), OpenMode.Read).ThrowIfFailure();
data = DecryptFont(fontFile.AsStream());
}
FontInfo info = new FontInfo((int)fontOffset, data.Length);
WriteMagicAndSize(fontOffset, data.Length);
fontOffset += 8;
uint start = fontOffset;
for (; fontOffset - start < data.Length; fontOffset++)
{
_storage.GetRef<byte>(fontOffset) = data[fontOffset - start];
}
return info;
}
else
{
if (!contentManager.TryGetSystemTitlesName(fontTitle, out string titleName))
{
titleName = "Unknown";
}
throw new InvalidSystemResourceException($"{titleName} ({fontTitle:x8}) system title not found! This font will not work, provide the system archive to fix this error. (See https://github.com/Ryujinx/Ryujinx#requirements for more information)");
}
}
else
{
throw new ArgumentException($"Unknown font \"{name}\"!");
}
}
_fontData = new Dictionary<SharedFontType, FontInfo>
{
{ SharedFontType.JapanUsEurope, CreateFont("FontStandard") },
{ SharedFontType.SimplifiedChinese, CreateFont("FontChineseSimplified") },
{ SharedFontType.SimplifiedChineseEx, CreateFont("FontExtendedChineseSimplified") },
{ SharedFontType.TraditionalChinese, CreateFont("FontChineseTraditional") },
{ SharedFontType.Korean, CreateFont("FontKorean") },
{ SharedFontType.NintendoEx, CreateFont("FontNintendoExtended") }
};
if (fontOffset > Horizon.FontSize)
{
throw new InvalidSystemResourceException("The sum of all fonts size exceed the shared memory size. " +
$"Please make sure that the fonts don't exceed {Horizon.FontSize} bytes in total. (actual size: {fontOffset} bytes).");
}
}
}
private void WriteMagicAndSize(ulong offset, int size)
{
const int key = 0x49621806;
int encryptedSize = BinaryPrimitives.ReverseEndianness(size ^ key);
_storage.GetRef<int>(offset + 0) = (int)BFTTFMagic;
_storage.GetRef<int>(offset + 4) = encryptedSize;
}
public int GetFontSize(SharedFontType fontType)
{
EnsureInitialized(_device.System.ContentManager);
return _fontData[fontType].Size;
}
public int GetSharedMemoryAddressOffset(SharedFontType fontType)
{
EnsureInitialized(_device.System.ContentManager);
return _fontData[fontType].Offset + 8;
}
private static byte[] DecryptFont(Stream bfttfStream)
{
static uint KXor(uint data) => data ^ FontKey;
using (BinaryReader reader = new BinaryReader(bfttfStream))
using (MemoryStream ttfStream = new MemoryStream())
using (BinaryWriter output = new BinaryWriter(ttfStream))
{
if (KXor(reader.ReadUInt32()) != BFTTFMagic)
{
throw new InvalidDataException("Error: Input file is not in BFTTF format!");
}
bfttfStream.Position += 4;
for (int i = 0; i < (bfttfStream.Length - 8) / 4; i++)
{
output.Write(KXor(reader.ReadUInt32()));
}
return ttfStream.ToArray();
}
}
}
}