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Code cleanup for font table.

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PopSlime
2023-09-17 20:26:31 +08:00
parent aa7452aead
commit 9c034c0f7b
2 changed files with 92 additions and 58 deletions
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144
Assets/Cryville/Common/Font/FontTable.cs
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@@ -3,6 +3,7 @@ using System.Collections.Generic;
using System.IO;
using System.Text;
#pragma warning disable IDE0049
namespace Cryville.Common.Font {
public abstract class FontTable<T> {
protected UInt32 Offset { get; private set; }
@@ -25,14 +26,17 @@ namespace Cryville.Common.Font {
readonly UInt16 minorVersion;
readonly UInt32 numFonts;
readonly List<UInt32> tableDirectoryOffsets = new List<UInt32>();
#pragma warning disable IDE0052 // Reserved
readonly String dsigTag;
readonly UInt32 dsigLength;
readonly UInt32 dsigOffset;
#pragma warning restore IDE0052 // Reserved
public TTCHeader(BinaryReader reader, UInt32 offset) : base(reader, offset) {
ttcTag = reader.ReadTag();
if (ttcTag != "ttcf") throw new NotImplementedException();
if (ttcTag != "ttcf") throw new NotSupportedException();
majorVersion = reader.ReadUInt16();
minorVersion = reader.ReadUInt16();
if (minorVersion != 0) throw new NotSupportedException();
numFonts = reader.ReadUInt32();
for (UInt32 i = 0; i < numFonts; i++) tableDirectoryOffsets.Add(reader.ReadUInt32());
if (majorVersion == 2) {
@@ -52,12 +56,16 @@ namespace Cryville.Common.Font {
public sealed class TableDirectory : FontTable<TableRecord, object> {
readonly UInt32 sfntVersion;
readonly UInt16 numTables;
#pragma warning disable IDE0052 // Reserved
readonly UInt16 searchRange;
readonly UInt16 entrySelector;
readonly UInt16 rangeShift;
#pragma warning restore IDE0052 // Reserved
readonly List<TableRecord> tableRecords = new List<TableRecord>();
public TableDirectory(BinaryReader reader, UInt32 offset) : base(reader, offset) {
sfntVersion = reader.ReadUInt32();
if (sfntVersion != 0x00010000 && sfntVersion != 0x4F54544F &&
sfntVersion != 0x74727565 && sfntVersion != 0x74797031) throw new NotSupportedException();
numTables = reader.ReadUInt16();
searchRange = reader.ReadUInt16();
entrySelector = reader.ReadUInt16();
@@ -99,48 +107,63 @@ namespace Cryville.Common.Font {
count = reader.ReadUInt16();
storageOffset = reader.ReadUInt16();
for (UInt16 i = 0; i < count; i++)
nameRecord.Add(new NameRecord {
platformID = reader.ReadUInt16(),
encodingID = reader.ReadUInt16(),
languageID = reader.ReadUInt16(),
nameID = (NameID)reader.ReadUInt16(),
length = reader.ReadUInt16(),
stringOffset = reader.ReadUInt16(),
});
nameRecord.Add(new NameRecord(
reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16(),
(NameID)reader.ReadUInt16(),
reader.ReadUInt16(),
reader.ReadUInt16()
));
if (version == 1) {
langTagCount = reader.ReadUInt16();
for (UInt16 i = 0; i < langTagCount; i++)
langTagRecord.Add(new LangTagRecord {
length = reader.ReadUInt16(),
langTagOffset = reader.ReadUInt16(),
});
langTagRecord.Add(new LangTagRecord(
reader.ReadUInt16(),
reader.ReadUInt16()
));
}
foreach (var i in nameRecord)
i.Load(reader, offset + storageOffset);
if (version == 1) {
foreach (var i in langTagRecord)
i.Load(reader, offset + storageOffset);
}
UInt32 origin = (UInt32)reader.BaseStream.Position;
for (int i = 0; i < nameRecord.Count; i++) nameRecord[i] = nameRecord[i].Load(reader, origin);
for (int i = 0; i < langTagRecord.Count; i++) langTagRecord[i] = langTagRecord[i].Load(reader, origin);
}
public sealed override IReadOnlyList<NameRecord> GetItems() {
return nameRecord;
}
}
public struct NameRecord {
public UInt16 platformID;
public UInt16 encodingID;
public UInt16 languageID;
public NameID nameID;
public UInt16 length;
public UInt16 stringOffset;
public String value { get; private set; }
public NameRecord Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + stringOffset;
public class NameRecord {
public UInt16 PlatformID { get; private set; }
public UInt16 EncodingID { get; private set; }
public UInt16 LanguageID { get; private set; }
public NameID NameID { get; private set; }
public UInt16 Length { get; private set; }
public UInt16 StringOffset { get; private set; }
public String Value { get; private set; }
public NameRecord(UInt16 platformID, UInt16 encodingID, UInt16 languageID, NameID nameID, UInt16 length, UInt16 stringOffset) {
PlatformID = platformID;
EncodingID = encodingID;
LanguageID = languageID;
NameID = nameID;
Length = length;
StringOffset = stringOffset;
}
public void Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + StringOffset;
Encoding encoding;
switch (platformID) {
case 0: encoding = Encoding.BigEndianUnicode; break;
case 3: encoding = Encoding.BigEndianUnicode; break;
default: return this;
try {
switch (PlatformID) {
case 0: encoding = Encoding.BigEndianUnicode; break;
case 1: encoding = Encoding.GetEncoding(10000 + EncodingID); break;
case 3: encoding = Encoding.BigEndianUnicode; break;
default: return;
}
}
value = encoding.GetString(reader.ReadBytes(length));
return this;
catch (NotSupportedException) { return; }
catch (ArgumentException) { return; }
Value = encoding.GetString(reader.ReadBytes(Length));
}
}
public enum NameID : UInt16 {
@@ -171,47 +194,58 @@ namespace Cryville.Common.Font {
DarkBackgroundPalette = 24,
VariationsPostScriptNamePrefix = 25,
}
public struct LangTagRecord {
public UInt16 length;
public UInt16 langTagOffset;
public String value { get; private set; }
public LangTagRecord Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + langTagOffset;
value = Encoding.BigEndianUnicode.GetString(reader.ReadBytes(length));
return this;
public class LangTagRecord {
public UInt16 Length { get; private set; }
public UInt16 LangTagOffset { get; private set; }
public String Value { get; private set; }
public LangTagRecord(UInt16 length, UInt16 langTagOffset) {
Length = length;
LangTagOffset = langTagOffset;
}
public void Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + LangTagOffset;
Value = Encoding.BigEndianUnicode.GetString(reader.ReadBytes(Length));
}
}
public sealed class MetaTable : FontTable<DataMap> {
readonly UInt32 version;
#pragma warning disable IDE0052 // Reserved
readonly UInt32 flags;
#pragma warning restore IDE0052 // Reserved
readonly UInt32 dataMapCount;
readonly List<DataMap> dataMaps = new List<DataMap>();
public MetaTable(BinaryReader reader, UInt32 offset) : base(reader, offset) {
version = reader.ReadUInt32();
if (version != 1) throw new NotSupportedException();
flags = reader.ReadUInt32();
reader.ReadUInt32();
dataMapCount = reader.ReadUInt32();
for (UInt32 i = 0; i < dataMapCount; i++)
dataMaps.Add(new DataMap {
tag = reader.ReadTag(),
dataOffset = reader.ReadUInt32(),
dataLength = reader.ReadUInt32(),
});
for (int i = 0; i < dataMaps.Count; i++) dataMaps[i] = dataMaps[i].Load(reader, offset);
dataMaps.Add(new DataMap (
reader.ReadTag(),
reader.ReadUInt32(),
reader.ReadUInt32()
));
foreach (var i in dataMaps)
i.Load(reader, offset);
}
public sealed override IReadOnlyList<DataMap> GetItems() {
return dataMaps;
}
}
public struct DataMap {
public String tag;
public UInt32 dataOffset;
public UInt32 dataLength;
public String value { get; private set; }
public DataMap Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + dataOffset;
value = Encoding.ASCII.GetString(reader.ReadBytes((int)dataLength));
return this;
public class DataMap {
public String Tag { get; private set; }
public UInt32 DataOffset { get; private set; }
public UInt32 DataLength { get; private set; }
public String Value { get; private set; }
public DataMap(String tag, UInt32 dataOffset, UInt32 dataLength) {
Tag = tag;
DataOffset = dataOffset;
DataLength = dataLength;
}
public void Load(BinaryReader reader, UInt32 origin) {
reader.BaseStream.Position = origin + DataOffset;
Value = Encoding.ASCII.GetString(reader.ReadBytes((int)DataLength));
}
}
public static class BinaryReaderExtensions {

6
Assets/Cryville/Common/Font/Typeface.cs
View File

@@ -23,9 +23,9 @@ namespace Cryville.Common.Font {
protected override void GetName(BinaryReader reader) {
var dir = new TableDirectory(reader, (uint)reader.BaseStream.Position);
var nameTable = (NameTable)dir.GetSubTable((from i in dir.GetItems() where i.tableTag == "name" select i).Single());
FamilyName = (from i in nameTable.GetItems() where i.nameID == NameID.FontFamilyName && i.value != null select i.value).First();
SubfamilyName = (from i in nameTable.GetItems() where i.nameID == NameID.FontSubfamilyName && i.value != null select i.value).First();
FullName = (from i in nameTable.GetItems() where i.nameID == NameID.FullFontName && i.value != null select i.value).First();
FamilyName = (from i in nameTable.GetItems() where i.NameID == NameID.FontFamilyName && i.Value != null select i.Value).First();
SubfamilyName = (from i in nameTable.GetItems() where i.NameID == NameID.FontSubfamilyName && i.Value != null select i.Value).First();
FullName = (from i in nameTable.GetItems() where i.NameID == NameID.FullFontName && i.Value != null select i.Value).First();
}
}
}