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anchorFormat 2 not supported. Should be '1'.

See original GitHub issue

Prerequisites

I have written a descriptive issue title
I have verified that I am running the latest version of Fonts
I have verified if the problem exist in both DEBUG and RELEASE mode
I have searched open and closed issues to ensure it has not already been reported

Description

After upgrading from beta15 to beta16 (via SixLabors.ImageSharp.Drawing), I often see this error in my log files. For now I have rolled back to beta15. I noticed that the font API has changed slightly in beta16, so maybe this is now intended but my code is no longer using fonts correctly?

Any pointers as to what I might be doing wrong or what I can do to work around it would be appreciated.

anchorFormat 2 not supported. Should be ‘1’.

System.NotSupportedException:
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.AnchorTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.MarkArrayTable..ctor (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType4SubTable+LookupType4Format1SubTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType4SubTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupTable.LoadLookupSubTable (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupListTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPosTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.AdvancedTypographic.GPosTable.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.Tables.TableLoader.Load (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.FontReader.TryGetTable (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.StreamFontMetrics.LoadFont (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.StreamFontMetrics.LoadFont (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.StreamFontMetrics.LoadFont (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.FileFontMetrics+<>c__DisplayClass3_0.<.ctor>b__0 (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at System.Lazy`1.ViaFactory (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at System.Lazy`1.CreateValue (System.Private.CoreLib, Version=6.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e)
   at SixLabors.Fonts.FileFontMetrics.TryGetGlyphId (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.TextLayout.DoFontRun (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.TextLayout.ProcessText (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at SixLabors.Fonts.TextLayout.GenerateLayout (SixLabors.Fonts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=d998eea7b14cab13)
   at ...userland...

Steps to Reproduce

var fontFamily = default(FontFamily);
if (!SystemFonts.TryGet("DejaVu Sans", out fontFamily))
{
    throw new Exception($"Unable to find a suitable font. Available options are: {String.Join(", ", SystemFonts.Families.Select(x => x.Name))}");
}
var badgeFont = new Font(fontFamily, 12, FontStyle.Regular);
var badgeTextSize = TextMeasurer.Measure("100", new TextOptions(badgeFont));

System Configuration

Fonts version: beta16
Other Six Labors packages and versions: ImageSharp 2.0, ImageSharp.Drawing 2.0
Environment (Operating system, version and so on): Linux
.NET Framework version: 6.0
Additional information: Azure App Service

Issue Analytics

State:
Created 2 years ago
Comments:8 (7 by maintainers)

Top GitHub Comments

1reaction

brianpopowcommented, Feb 17, 2022

@JimBobSquarePants maybe we should consider skipping over the data of Anchor Type 3, which we can not handle yet instead of throwing an exception? I think in most cases rendering of the font will be fine.

1reaction

LeaFrockcommented, Feb 17, 2022

I’ve met a similar exception, NotSupportedException: anchorFormat 3 not supported. Should be '1'.

OS: Win10 Font: Microsoft Sans Serif

Maybe the stacks below makes sense.

SixLabors.Fonts.Tables.AdvancedTypographic.GPos.AnchorTable.Load(BigEndianBinaryReader reader, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.BaseRecord..ctor(BigEndianBinaryReader reader, ushort classCount, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.BaseArrayTable..ctor(BigEndianBinaryReader reader, long offset, ushort classCount)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType4SubTable+LookupType4Format1SubTable.Load(BigEndianBinaryReader reader, long offset, LookupFlags lookupFlags)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType4SubTable.Load(BigEndianBinaryReader reader, long offset, LookupFlags lookupFlags)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupTable.LoadLookupSubTable(ushort lookupType, LookupFlags lookupFlags, BigEndianBinaryReader reader, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType9Format1SubTable.Load(BigEndianBinaryReader reader, long offset, LookupFlags lookupFlags, Func<ushort, LookupFlags, BigEndianBinaryReader, long, LookupSubTable> subTableLoader)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupType9SubTable.Load(BigEndianBinaryReader reader, long offset, LookupFlags lookupFlags, Func<ushort, LookupFlags, BigEndianBinaryReader, long, LookupSubTable> subTableLoader)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupTable.LoadLookupSubTable(ushort lookupType, LookupFlags lookupFlags, BigEndianBinaryReader reader, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupTable.Load(BigEndianBinaryReader reader, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPos.LookupListTable.Load(BigEndianBinaryReader reader, long offset)
SixLabors.Fonts.Tables.AdvancedTypographic.GPosTable.Load(BigEndianBinaryReader reader)
SixLabors.Fonts.Tables.AdvancedTypographic.GPosTable.Load(FontReader fontReader)
SixLabors.Fonts.Tables.TableLoader.Load<TTable>(FontReader reader)
SixLabors.Fonts.FontReader.TryGetTable<TTableType>()
SixLabors.Fonts.StreamFontMetrics.LoadFont(FontReader reader)
SixLabors.Fonts.StreamFontMetrics.LoadFont(string path, long offset)
System.Lazy<T>.ViaFactory(LazyThreadSafetyMode mode)
System.Lazy<T>.ExecutionAndPublication(LazyHelper executionAndPublication, bool useDefaultConstructor)
System.Lazy<T>.CreateValue()
SixLabors.Fonts.FileFontMetrics.TryGetGlyphId(CodePoint codePoint, Nullable<CodePoint> nextCodePoint, out ushort glyphId, out bool skipNextCodePoint)
SixLabors.Fonts.TextLayout.DoFontRun(ReadOnlySpan<char> text, TextOptions options, FontMetrics fontMetrics, BidiRun[] bidiRuns, Dictionary<int, int> bidiMap, GlyphSubstitutionCollection substitutions, GlyphPositioningCollection positionings)
SixLabors.Fonts.TextLayout.ProcessText(ReadOnlySpan<char> text, TextOptions options)
SixLabors.Fonts.TextLayout.GenerateLayout(ReadOnlySpan<char> text, TextOptions options)
SixLabors.Fonts.TextRenderer.RenderText(ReadOnlySpan<char> text, TextOptions options)
SixLabors.ImageSharp.Drawing.Processing.Processors.Text.DrawTextProcessor<TPixel>.BeforeImageApply()
SixLabors.ImageSharp.Processing.Processors.ImageProcessor<TPixel>.SixLabors.ImageSharp.Processing.Processors.IImageProcessor<TPixel>.Execute()
SixLabors.ImageSharp.Processing.DefaultImageProcessorContext<TPixel>.ApplyProcessor(IImageProcessor processor, Rectangle rectangle)
SixLabors.ImageSharp.Processing.DefaultImageProcessorContext<TPixel>.ApplyProcessor(IImageProcessor processor)
SixLabors.ImageSharp.Drawing.Processing.DrawTextExtensions.DrawText(IImageProcessingContext source, string text, Font font, Color color, PointF location)
...(User codes)