ryujinx/Ryujinx.HLE/HOS/Font/SharedFontManager.cs

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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 System;
using System.Buffers.Binary;
using System.Collections.Generic;
using System.IO;
using static Ryujinx.HLE.Utilities.FontUtils;
namespace Ryujinx.HLE.HOS.Font
{
class SharedFontManager
{
private Switch _device;
private ulong _physicalAddress;
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, ulong physicalAddress)
{
_physicalAddress = physicalAddress;
_device = device;
}
public void Initialize(ContentManager contentManager)
{
_fontData?.Clear();
_fontData = null;
}
public void EnsureInitialized(ContentManager contentManager)
{
if (_fontData == null)
{
_device.Memory.ZeroFill(_physicalAddress, Horizon.FontSize);
uint fontOffset = 0;
FontInfo CreateFont(string name)
{
if (contentManager.TryGetFontTitle(name, out long 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(_physicalAddress + fontOffset, data.Length);
fontOffset += 8;
uint start = fontOffset;
for (; fontOffset - start < data.Length; fontOffset++)
{
_device.Memory.Write(_physicalAddress + 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 address, int size)
{
const int decMagic = 0x18029a7f;
const int key = 0x49621806;
int encryptedSize = BinaryPrimitives.ReverseEndianness(size ^ key);
_device.Memory.Write(address + 0, decMagic);
_device.Memory.Write(address + 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;
}
}
}