/// <summary>
/// Reads a <see cref="FontDescription"/> from the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>a <see cref="FontDescription"/>.</returns>
public static FontDescription LoadDescription(Stream stream)
{
// only read the name table
var reader = new FontReader(stream);
return(LoadDescription(reader));
}
internal static FontInstance LoadFont(FontReader reader)
{
// https://www.microsoft.com/typography/otspec/recom.htm#TableOrdering
// recomended order
var head = reader.GetTable <HeadTable>(); // head - not saving but loading in suggested order
reader.GetTable <HoizontalHeadTable>(); // hhea
reader.GetTable <MaximumProfileTable>(); // maxp
var os2 = reader.GetTable <OS2Table>(); // OS/2
var horizontalMetrics = reader.GetTable <HorizontalMetricsTable>(); // hmtx
// LTSH - Linear threshold data
// VDMX - Vertical device metrics
// hdmx - Horizontal device metrics
var cmap = reader.GetTable <CMapTable>(); // cmap
// fpgm - Font Program
// prep - Control Value Program
// cvt - Control Value Table
reader.GetTable <IndexLocationTable>(); // loca
var glyphs = reader.GetTable <GlyphTable>(); // glyf
var kern = reader.GetTable <KerningTable>(); // kern - Kerning
var nameTable = reader.GetTable <NameTable>(); // name
// post - PostScript information
// gasp - Grid-fitting/Scan-conversion (optional table)
// PCLT - PCL 5 data
// DSIG - Digital signature
return(new FontInstance(nameTable, cmap, glyphs, os2, horizontalMetrics, head, kern));
}
/// <summary>
/// Reads a <see cref="FontInstance"/> from the specified stream.
/// </summary>
/// <param name="path">The file path.</param>
/// <returns>a <see cref="FontInstance"/>.</returns>
public static FontInstance LoadFont(string path)
{
using (var fs = File.OpenRead(path))
{
var reader = new FontReader(fs);
return(LoadFont(reader));
}
}
/// <summary>
/// Reads a <see cref="FontDescription"/> from the specified stream.
/// </summary>
/// <param name="path">The file path.</param>
/// <returns>a <see cref="FontDescription"/>.</returns>
public static FontDescription LoadDescription(string path)
{
using (FileStream fs = File.OpenRead(path))
{
FontReader reader = new FontReader(fs);
return(LoadDescription(reader));
}
}
/// <summary>
/// Reads a <see cref="FontDescription" /> from the specified stream.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns>
/// a <see cref="FontDescription" />.
/// </returns>
internal static FontDescription LoadDescription(FontReader reader)
{
var head = reader.GetTable <HeadTable>();
var os2 = reader.GetTable <OS2Table>();
var nameTable = reader.GetTable <NameTable>();
return(new FontDescription(nameTable, os2, head));
}
/// <summary>
/// Reads a <see cref="FontDescription"/> from the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>a <see cref="FontDescription"/>.</returns>
public static FontDescription LoadDescription(Stream stream)
{
Guard.NotNull(stream, nameof(stream));
// only read the name table
var reader = new FontReader(stream);
return(LoadDescription(reader));
}
/// <summary>
/// Reads a <see cref="FontDescription"/> from the specified stream.
/// </summary>
/// <param name="path">The file path.</param>
/// <returns>a <see cref="FontDescription"/>.</returns>
public static FontDescription LoadDescription(string path)
{
Guard.NotNullOrWhiteSpace(path, nameof(path));
using FileStream fs = File.OpenRead(path);
var reader = new FontReader(fs);
return(LoadDescription(reader));
}
/// <summary>
/// Reads a <see cref="FontDescription" /> from the specified stream.
/// </summary>
/// <param name="reader">The reader.</param>
/// <returns>
/// a <see cref="FontDescription" />.
/// </returns>
internal static FontDescription LoadDescription(FontReader reader)
{
// NOTE: These fields are read in their optimized order
// https://docs.microsoft.com/en-gb/typography/opentype/spec/recom#optimized-table-ordering
HeadTable head = reader.GetTable <HeadTable>();
OS2Table os2 = reader.GetTable <OS2Table>();
NameTable nameTable = reader.GetTable <NameTable>();
return(new FontDescription(nameTable, os2, head));
}
internal static FontInstance LoadFont(FontReader reader)
{
// https://www.microsoft.com/typography/otspec/recom.htm#TableOrdering
// recomended order
HeadTable head = reader.GetTable <HeadTable>(); // head - not saving but loading in suggested order
HorizontalHeadTable hhea = reader.GetTable <HorizontalHeadTable>(); // hhea
reader.GetTable <MaximumProfileTable>(); // maxp
OS2Table os2 = reader.GetTable <OS2Table>(); // OS/2
HorizontalMetricsTable horizontalMetrics = reader.GetTable <HorizontalMetricsTable>(); // hmtx
// LTSH - Linear threshold data
// VDMX - Vertical device metrics
// hdmx - Horizontal device metrics
CMapTable cmap = reader.GetTable <CMapTable>(); // cmap
// fpgm - Font Program
// prep - Control Value Program
// cvt - Control Value Table
reader.GetTable <IndexLocationTable>(); // loca
GlyphTable glyphs = reader.GetTable <GlyphTable>(); // glyf
KerningTable kern = reader.GetTable <KerningTable>(); // kern - Kerning
NameTable nameTable = reader.GetTable <NameTable>(); // name
ColrTable?colrTable = reader.TryGetTable <ColrTable>(); // colr
CpalTable?cpalTable;
if (colrTable != null)
{
cpalTable = reader.GetTable <CpalTable>(); // CPAL - required if COLR is provided
}
else
{
cpalTable = reader.TryGetTable <CpalTable>(); // colr
}
// post - PostScript information
// gasp - Grid-fitting/Scan-conversion (optional table)
// PCLT - PCL 5 data
// DSIG - Digital signature
return(new FontInstance(
nameTable,
cmap,
glyphs,
os2,
hhea,
horizontalMetrics,
head,
kern,
colrTable,
cpalTable));
}
/// <summary>
/// Reads all the <see cref="FontDescription"/>s from the specified stream (typically a .ttc file like simsun.ttc).
/// </summary>
/// <param name="stream">The stream to read the font collection from.</param>
/// <returns>a <see cref="FontDescription"/>.</returns>
public static FontDescription[] LoadFontCollectionDescriptions(Stream stream)
{
long startPos = stream.Position;
var reader = new BinaryReader(stream, true);
var ttcHeader = TtcHeader.Read(reader);
var result = new FontDescription[(int)ttcHeader.NumFonts];
for (int i = 0; i < ttcHeader.NumFonts; ++i)
{
stream.Position = startPos + ttcHeader.OffsetTable[i];
var fontReader = new FontReader(stream);
result[i] = LoadDescription(fontReader);
}
return(result);
}
/// <summary>
/// Reads a <see cref="FontInstance"/> from the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>a <see cref="FontInstance"/>.</returns>
public static FontInstance LoadFont(Stream stream)
{
var reader = new FontReader(stream);
return(LoadFont(reader));
}
