internal Typeface Read(BinaryReader reader)
{
//WOFF File
//WOFFHeader File header with basic font type and version, along with offsets to metadata and private data blocks.
//TableDirectory Directory of font tables, indicating the original size, compressed size and location of each table within the WOFF file.
//FontTables The font data tables from the input sfnt font, compressed to reduce bandwidth requirements.
//ExtendedMetadata An optional block of extended metadata, represented in XML format and compressed for storage in the WOFF file.
//PrivateData An optional block of private data for the font designer, foundry, or vendor to use.
_header = ReadWOFFHeader(reader);
if (_header == null)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("can't read ");
#endif
return(null); //notify user too
}
//
WoffTableDirectory[] woffTableDirs = ReadTableDirectories(reader);
if (woffTableDirs == null)
{
return(null);
}
//
//try read each compressed table
if (DecompressHandler == null)
{
if (WoffDefaultZlibDecompressFunc.DecompressHandler != null)
{
DecompressHandler = WoffDefaultZlibDecompressFunc.DecompressHandler;
}
else
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("no Zlib DecompressHandler ");
#endif
return(null); //notify user too
}
}
TableEntryCollection tableEntryCollection = CreateTableEntryCollection(woffTableDirs);
using (MemoryStream decompressStream = new MemoryStream())
{
if (Extract(reader, woffTableDirs, decompressStream))
{
using (ByteOrderSwappingBinaryReader reader2 = new ByteOrderSwappingBinaryReader(decompressStream))
{
decompressStream.Position = 0;
OpenFontReader openFontReader = new OpenFontReader();
return(openFontReader.ReadTableEntryCollection(tableEntryCollection, reader2));
}
}
}
return(null);
}
private async static Task MeasureStringFor(FontDownload loader, string path)
{
byte[] data = null;
data = await loader.LoadFrom(path);
#if UseOpenFont
ZlibDecompressStreamFunc zipfunc = (byte[] dataIn, byte[] output) =>
{
using (var streamIn = new MemoryStream(dataIn))
{
#if NET6_0
ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream input = new ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream(streamIn);
using (var streamOut = new MemoryStream(output))
input.CopyTo(streamOut);
#endif
return(true);
}
};
WoffDefaultZlibDecompressFunc.DecompressHandler = zipfunc;
BrotliDecompressStreamFunc brotlifunc = (byte[] dataIn, Stream dataOut) =>
{
using (var streamIn = new MemoryStream(dataIn))
{
System.IO.Compression.BrotliStream deflate = new System.IO.Compression.BrotliStream(streamIn, System.IO.Compression.CompressionMode.Decompress);
deflate.CopyTo(dataOut);
return(true);
}
};
Woff2DefaultBrotliDecompressFunc.DecompressHandler = brotlifunc;
using (var ms = new System.IO.MemoryStream(data))
{
var reader = new Typography.OpenFont.OpenFontReader();
var preview = reader.ReadPreview(ms);
Console.WriteLine("Loaded font reference " + preview.Name);
}
using (var ms = new System.IO.MemoryStream(data))
{
var reader = new Typography.OpenFont.OpenFontReader();
var full = reader.Read(ms);
string text = "This is the text to measure";
var encoding = Scryber.OpenType.SubTables.CMapEncoding.WindowsUnicode;
int fitted;
var size = full.MeasureString(text, 0, 12, 10000, true, out fitted);
Console.WriteLine("String Measured to " + size.ToString() + " and fitted " + fitted + " characters out of " + text.Length);
}
#else
TypefaceReader tfreader = new TypefaceReader();
ITypefaceInfo info;
using (var ms = new System.IO.MemoryStream(data))
{
info = tfreader.ReadTypeface(ms, path);
if (null == info)
{
ExitClean("Could not read the info from the font file");
return;
}
else if (info.FontCount == 0)
{
ExitClean("No fonts could be read from the data: " + info.ErrorMessage ?? "Unknown error");
return;
}
else
{
Console.WriteLine("Read " + info.FontCount + " typefaces from the font file " + info.Source);
foreach (var reference in info.Fonts)
{
Console.WriteLine(" " + reference.FamilyName + " (weight: " + reference.FontWeight.ToString() + ", width: " + reference.FontWidth + ", restrictions : " + reference.Restrictions + ", selections : " + reference.Selections.ToString() + ")");
}
}
}
TypeMeasureOptions options = new TypeMeasureOptions();
using (var ms = new System.IO.MemoryStream(data))
{
foreach (var fref in info.Fonts)
{
Console.WriteLine();
ms.Position = 0;
var typeface = tfreader.GetFont(ms, info.Source, fref);
if (null == typeface || typeface.IsValid == false)
{
ExitClean("The font " + fref.ToString() + " was not valid");
return;
}
else
{
Console.WriteLine("Loaded font reference " + typeface.ToString());
}
var metrics = typeface.GetMetrics(options);
if (null != metrics)
{
var line = metrics.MeasureLine("This is the text to measure", 0, 12.0, 10000, options);
Console.WriteLine("Measured the string to " + line.RequiredWidth + ", " + line.RequiredHeight + " points, and fitted " + line.CharsFitted + " chars" + (line.OnWordBoudary ? " breaking on the word boundary." : "."));
}
else
{
ExitClean("No metrics were returned for the font " + typeface.ToString());
return;
}
var ttfData = typeface.GetFileData(DataFormat.TTF);
if (null == ttfData)
{
ExitClean("No data was returned in TTF format for the font " + typeface.ToString());
}
else
{
Console.WriteLine("TrueType font data was extracted at " + ttfData.Length + " bytes from the original data of " + data.Length);
}
var name = typeface.FamilyName;
if (typeface.FontWeight != WeightClass.Normal)
{
if (name.IndexOf(typeface.FontWeight.ToString()) < 0)
{
name += " " + typeface.FontWeight.ToString();
}
}
if ((typeface.Selections & FontSelection.Italic) > 0)
{
if (name.IndexOf("Italic") < 0)
{
name += " Italic";
}
}
loader.SaveToLocal("Output", name + ".ttf", ttfData);
}
}
#if Legacy
var ttf = new Scryber.OpenType.TTFFile(data, 0);
Console.WriteLine("Loaded font file " + ttf.ToString());
var encoding = Scryber.OpenType.SubTables.CMapEncoding.WindowsUnicode;
string text = "This is the text to measure";
int fitted;
var size = ttf.MeasureString(encoding, text, 0, 12, 1000, true, out fitted);
Console.WriteLine("String Measured to " + size.ToString() + " and fitted " + fitted + " characters out of " + text.Length);
//Measure 90 wiout word boundary
size = ttf.MeasureString(encoding, text, 0, 12, 90, false, out fitted);
Console.WriteLine("String Measured to " + size.ToString() + " and fitted " + fitted + " characters out of " + text.Length + " to string '" + text.Substring(0, fitted) + "'");
//Measure 90 with word boundary
size = ttf.MeasureString(encoding, text, 0, 12, 90, true, out fitted);
Console.WriteLine("String Measured to " + size.ToString() + " and fitted " + fitted + " characters out of " + text.Length + " to string '" + text.Substring(0, fitted) + "'");
#endif
#if Performance
var stopWatch = System.Diagnostics.Stopwatch.StartNew();
MeasureStringMeasurer(ttf);
stopWatch.Stop();
Console.WriteLine("To measure 4 different strings " + maxRepeat + " times took " + stopWatch.Elapsed.TotalMilliseconds + "ms");
#endif
#endif
}
