public ByteEncodingCMapTable(TrueTypeCMapPlatform platformId, ushort encodingId, ushort languageId, byte[] glyphMapping)
{
this.glyphMapping = glyphMapping;
PlatformId = platformId;
EncodingId = encodingId;
LanguageId = languageId;
}
/// <summary>
/// Create a new <see cref="Format4CMapTable"/>.
/// </summary>
public Format4CMapTable(TrueTypeCMapPlatform platformId, ushort encodingId, ushort language, IReadOnlyList <Segment> segments, IReadOnlyList <ushort> glyphIds)
{
PlatformId = platformId;
EncodingId = encodingId;
Language = language;
Segments = segments ?? throw new ArgumentNullException(nameof(segments));
GlyphIds = glyphIds ?? throw new ArgumentNullException(nameof(glyphIds));
}
public static Format4CMapTable Load(TrueTypeDataBytes data, TrueTypeCMapPlatform platformId, ushort encodingId)
{
// Length in bytes.
var length = data.ReadUnsignedShort();
// Used for sub-tables with a Macintosh platform ID.
var version = data.ReadUnsignedShort();
var doubleSegmentCount = data.ReadUnsignedShort();
// Defines the number of contiguous segments.
var segmentCount = doubleSegmentCount / 2;
// Some crazy sum.
var searchRange = data.ReadUnsignedShort();
var entrySelector = data.ReadUnsignedShort();
var rangeShift = data.ReadUnsignedShort();
// End character codes for each segment.
var endCounts = data.ReadUnsignedShortArray(segmentCount);
// Should be zero.
var reservedPad = data.ReadUnsignedShort();
// Start character codes for each segment.
var startCounts = data.ReadUnsignedShortArray(segmentCount);
// Delta for all character codes in the segment. Contrary to the spec this is actually a short[].
var idDeltas = data.ReadShortArray(segmentCount);
var idRangeOffsets = data.ReadUnsignedShortArray(segmentCount);
const int singleIntsRead = 8;
const int intArraysRead = 8;
// ReSharper disable once ArrangeRedundantParentheses
var remainingBytes = length - ((singleIntsRead * 2) + intArraysRead * segmentCount);
var remainingInts = remainingBytes / 2;
var glyphIndices = data.ReadUnsignedShortArray(remainingInts);
var segments = new Segment[endCounts.Length];
for (int i = 0; i < endCounts.Length; i++)
{
var start = startCounts[i];
var end = endCounts[i];
var delta = idDeltas[i];
var offsets = idRangeOffsets[i];
segments[i] = new Segment(start, end, delta, offsets);
}
return(new Format4CMapTable(platformId, encodingId, version, segments, glyphIndices));
}
public static ByteEncodingCMapTable Load(TrueTypeDataBytes data, TrueTypeCMapPlatform platformId, ushort encodingId)
{
var length = data.ReadUnsignedShort();
var language = data.ReadUnsignedShort();
var glyphMapping = data.ReadByteArray(length - (SizeOfShort * 3));
return(new ByteEncodingCMapTable(platformId, encodingId, language, glyphMapping));
}
/// <summary>
/// Create a new <see cref="TrimmedTableMappingCMapTable"/>.
/// </summary>
public TrimmedTableMappingCMapTable(TrueTypeCMapPlatform platformId, ushort encodingId, int firstCharacterCode, int entryCount, ushort[] glyphIndices)
{
FirstCharacterCode = firstCharacterCode;
this.entryCount = entryCount;
this.glyphIndices = glyphIndices ?? throw new ArgumentNullException(nameof(glyphIndices));
LastCharacterCode = firstCharacterCode + entryCount - 1;
PlatformId = platformId;
EncodingId = encodingId;
}
public static ByteEncodingCMapTable Load(TrueTypeDataBytes data, TrueTypeCMapPlatform platformId, int encodingId)
{
// ReSharper disable UnusedVariable
var length = data.ReadUnsignedShort();
var version = data.ReadUnsignedShort();
// ReSharper restore UnusedVariable
var glyphMapping = data.ReadByteArray(GlyphMappingLength);
return(new ByteEncodingCMapTable(platformId, encodingId, glyphMapping));
}
/// <summary>
/// Create a new <see cref="Format4CMapTable"/>.
/// </summary>
public Format4CMapTable(TrueTypeCMapPlatform platformId, int encodingId, int language, IReadOnlyList <Segment> segments, IReadOnlyList <int> glyphIds)
{
PlatformId = platformId;
EncodingId = encodingId;
Language = language;
Segments = segments ?? throw new ArgumentNullException(nameof(segments));
GlyphIds = glyphIds ?? throw new ArgumentNullException(nameof(glyphIds));
FirstCharacterCode = Segments[0].StartCode;
LastCharacterCode = Segments[Segments.Count - 2].EndCode;
}
public static TrimmedTableMappingCMapTable Load(TrueTypeDataBytes data, TrueTypeCMapPlatform platformId, ushort encodingId)
{
var length = data.ReadUnsignedShort();
var language = data.ReadUnsignedShort();
// First character code in the range.
var firstCode = data.ReadUnsignedShort();
// Number of character codes in the range.
var entryCount = data.ReadUnsignedShort();
var glyphIndices = data.ReadUnsignedShortArray(entryCount);
return(new TrimmedTableMappingCMapTable(platformId, encodingId, firstCode, entryCount, glyphIndices));
}
public static HighByteMappingCMapTable Load(TrueTypeDataBytes data, int numberOfGlyphs, TrueTypeCMapPlatform platformId, int encodingId)
{
// ReSharper disable UnusedVariable
var length = data.ReadUnsignedShort();
var version = data.ReadUnsignedShort();
// ReSharper restore UnusedVariable
var subHeaderKeys = new int[256];
var maximumSubHeaderIndex = 0;
for (var i = 0; i < 256; i++)
{
var value = data.ReadUnsignedShort();
maximumSubHeaderIndex = Math.Max(maximumSubHeaderIndex, value / 8);
subHeaderKeys[i] = value;
}
var subHeaderCount = maximumSubHeaderIndex + 1;
var subHeaders = new SubHeader[subHeaderCount];
for (var i = 0; i < subHeaderCount; i++)
{
var firstCode = data.ReadUnsignedShort();
var entryCount = data.ReadUnsignedShort();
var idDelta = data.ReadSignedShort();
var idRangeOffset = data.ReadUnsignedShort() - (subHeaderCount - i - 1) * 8 - 2;
subHeaders[i] = new SubHeader(firstCode, entryCount, idDelta, idRangeOffset);
}
var glyphIndexArrayOffset = data.Position;
var characterCodeToGlyphId = new Dictionary <int, int>();
for (var i = 0; i < subHeaderCount; i++)
{
var subHeader = subHeaders[i];
data.Seek(glyphIndexArrayOffset + subHeader.IdRangeOffset);
for (int j = 0; j < subHeader.EntryCount; j++)
{
int characterCode = (i << 8) + (subHeader.FirstCode + j);
var p = (int)data.ReadUnsignedShort();
if (p > 0)
{
p = (p + subHeader.IdDelta) % 65536;
}
if (p >= numberOfGlyphs)
{
continue;
}
characterCodeToGlyphId[characterCode] = p;
}
}
return(new HighByteMappingCMapTable(platformId, encodingId, characterCodeToGlyphId));
}
private HighByteMappingCMapTable(TrueTypeCMapPlatform platformId, int encodingId, IReadOnlyDictionary <int, int> characterCodesToGlyphIndices)
{
this.characterCodesToGlyphIndices = characterCodesToGlyphIndices ?? throw new ArgumentNullException(nameof(characterCodesToGlyphIndices));
PlatformId = platformId;
EncodingId = encodingId;
}
public SubTableHeaderEntry(TrueTypeCMapPlatform platformId, int encodingId, long offset)
{
PlatformId = platformId;
EncodingId = encodingId;
Offset = offset;
}
private ByteEncodingCMapTable(TrueTypeCMapPlatform platformId, int encodingId, byte[] glyphMapping)
{
this.glyphMapping = glyphMapping;
PlatformId = platformId;
EncodingId = encodingId;
}
