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using LibHac;
using Ryujinx.HLE.FileSystem;
using Ryujinx.HLE.FileSystem.Content;
using Ryujinx.HLE.Resource;
using Ryujinx.HLE.Utilities;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using static Ryujinx.HLE.Utilities.FontUtils;
namespace Ryujinx.HLE.HOS.Font
{
class SharedFontManager
{
private Switch Device;
private long PhysicalAddress;
private string FontsPath;
private struct FontInfo
{
public int Offset;
public int Size;
public FontInfo(int Offset, int Size)
{
this.Offset = Offset;
this.Size = Size;
}
}
private Dictionary<SharedFontType, FontInfo> FontData;
public SharedFontManager(Switch Device, long PhysicalAddress)
{
this.PhysicalAddress = PhysicalAddress;
this.Device = Device;
FontsPath = Path.Combine(Device.FileSystem.GetSystemPath(), "fonts");
}
public void EnsureInitialized(ContentManager ContentManager)
{
if (FontData == null)
{
Device.Memory.FillWithZeros(PhysicalAddress, Horizon.FontSize);
uint FontOffset = 0;
FontInfo CreateFont(string Name)
{
if (ContentManager.TryGetFontTitle(Name, out long FontTitle))
{
string ContentPath = ContentManager.GetInstalledContentPath(FontTitle, StorageId.NandSystem, ContentType.Data);
string FontPath = Device.FileSystem.SwitchPathToSystemPath(ContentPath);
if (!string.IsNullOrWhiteSpace(FontPath))
{
int FileIndex = 0;
//Use second file in Chinese Font title for standard
if(Name == "FontChineseSimplified")
{
FileIndex = 1;
}
FileStream NcaFileStream = new FileStream(FontPath, FileMode.Open, FileAccess.Read);
Nca Nca = new Nca(Device.System.KeySet, NcaFileStream, false);
NcaSection RomfsSection = Nca.Sections.FirstOrDefault(x => x?.Type == SectionType.Romfs);
Romfs Romfs = new Romfs(Nca.OpenSection(RomfsSection.SectionNum, false, Device.System.FsIntegrityCheckLevel));
Stream FontFile = Romfs.OpenFile(Romfs.Files[FileIndex]);
byte[] Data = DecryptFont(FontFile);
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.WriteByte(PhysicalAddress + FontOffset, Data[FontOffset - Start]);
}
NcaFileStream.Dispose();
Nca.Dispose();
return Info;
}
}
string FontFilePath = Path.Combine(FontsPath, Name + ".ttf");
if (File.Exists(FontFilePath))
{
byte[] Data = File.ReadAllBytes(FontFilePath);
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.WriteByte(PhysicalAddress + FontOffset, Data[FontOffset - Start]);
}
return Info;
}
else
{
throw new InvalidSystemResourceException($"Font \"{Name}.ttf\" not found. Please provide it in \"{FontsPath}\".");
}
}
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(long Position, int Size)
{
const int DecMagic = 0x18029a7f;
const int Key = 0x49621806;
int EncryptedSize = EndianSwap.Swap32(Size ^ Key);
Device.Memory.WriteInt32(Position + 0, DecMagic);
Device.Memory.WriteInt32(Position + 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;
}
}
}
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