SkiaSharp 🚀 - [BUG][macOS] EntryPointNotFoundException after upgrading to 1.68.1-rc.147

The same on Windows WPF:
System.EntryPointNotFoundException: 'Unable to find an entry point named 'sk_refcnt_safe_unref' in DLL 'libSkiaSharp'.'

I've deleted bin/obj, rebuild

michaldobrodenka on 27 Sep 2019

👍1

quick update from my side - i have also cleaned and deleted bin/obj. After closing Visual Studio and re-opening the solution with the latest preview version of VS it works fine.

nor0x on 27 Sep 2019

👍1

I have a similar issue on XF / iOS. The app crashes on launch, and I can't find any useful exception information. AppCenter doesn't catch anything either.

adrianknight89 on 30 Sep 2019

I am getting the same crash after upgrading.

@Redth This is a pretty critical problem since 1.68 does not work on Catalina but this beta does (before it crashes)

ERROR: System.EntryPointNotFoundException: sk_refcnt_safe_unref assembly:<unknown assembly> type:<unknown type> member:(null)
  at (wrapper managed-to-native) SkiaSharp.SkiaApi.sk_refcnt_safe_unref(intptr)
  at SkiaSharp.SKObjectExtensions.SafeUnRef (SkiaSharp.ISKReferenceCounted obj) [0x00017] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKObject.GetObject[TSkiaObject,TSkiaImplementation] (System.IntPtr handle, System.Boolean owns, System.Boolean unrefExisting, System.Boolean refNew) [0x0003b] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKObject.GetObject[TSkiaObject] (System.IntPtr handle, System.Boolean owns, System.Boolean unrefExisting, System.Boolean refNew) [0x00000] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKTypeface.FromFamilyName (System.String familyName, SkiaSharp.SKFontStyle style) [0x0001a] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKTypeface.FromFamilyName (System.String familyName, System.Int32 weight, System.Int32 width, SkiaSharp.SKFontStyleSlant slant) [0x00009] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKTypeface.FromFamilyName (System.String familyName, SkiaSharp.SKFontStyleWeight weight, SkiaSharp.SKFontStyleWidth width, SkiaSharp.SKFontStyleSlant slant) [0x00000] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at SkiaSharp.SKTypeface.FromFamilyName (System.String familyName, SkiaSharp.SKTypefaceStyle style) [0x00038] in <0dd1f6e452a9498eb4c5ec4fafde30fd>:0 
  at CrossGraphics.Skia.SkiaGraphics.GetFontInfo (CrossGraphics.Font f) [0x00063] in /Users/fak/Dropbox/Projects/Circuit/External/CrossGraphics/src/SkiaGraphics.cs:273 
  at CrossGraphics.Skia.SkiaGraphics.GetFontMetrics () [0x00001] in /Users/fak/Dropbox/Projects/Circuit/External/CrossGraphics/src/SkiaGraphics.cs:252 
  at CrossGraphics.Button.Draw (CrossGraphics.IGraphics g) [0x000d3] in /Users/fak/Dropbox/Projects/Circuit/External/CrossGraphics/src/Canvas.cs:174 
  at Circuit.Scope.Draw (CrossGraphics.IGraphics graphics, Circuit.ScopeTrack[] tracks, System.Drawing.RectangleF wholeFrame, System.Boolean stacked, System.Boolean drawUI, System.Boolean drawAxes, System.Boolean drawCursor) [0x002f0] in /Users/fak/Dropbox/Projects/Circuit/CircuitLib/Scope.cs:821 
  at Circuit.Scope.Draw (CrossGraphics.IGraphics g) [0x00056] in /Users/fak/Dropbox/Projects/Circuit/CircuitLib/Scope.cs:733 
  at Circuit.Mac.ScopeView.OnPaintSurface (SkiaSharp.Views.Mac.SKPaintGLSurfaceEventArgs e) [0x000c2] in /Users/fak/Dropbox/Projects/Circuit/CircuitMac/ScopeView.cs:182

praeclarum on 12 Oct 2019

This function was added in:

https://github.com/mono/SkiaSharp/commit/d5aa34a78786a9e24c13655694760bf3ee4db45a#diff-1aed66166e4845e2a091a4e328bb6a43R101

I've looked over the Skia sources and don't see this function (sk_refcnt_safe_unref) anywhere.

praeclarum on 12 Oct 2019

It is in the source: https://github.com/mono/skia/blob/xamarin-mobile-bindings/src/c/sk_general.cpp#L34

SkiaSharp never calls Skia-API directly it always uses a C-Wrapper

Gillibald on 12 Oct 2019

👍1

Does this also happen with the preview (-rc.153) from the preview feed?
https://nugetized.blob.core.windows.net/skiasharp-eap/index.json

The -rc.147 had some issues with regards to disposing native objects that is why I have this later one where I think I got the memory management fixed. I think I might delist this version as it seems to have this issue for everyone. Not sure how the other folks that were testing this version did not hit any of these issues.

mattleibow on 12 Oct 2019

@mattleibow 153 is working for me! <3

My build server will love you if you put it up on nuget :-)

praeclarum on 12 Oct 2019

🎉4

We are just waiting a week or so to make sure that it does not break the world. But what I think is happening is that nobody really uses the private feed. I suppose that is what the preview for NuGet really is for...

mattleibow on 12 Oct 2019

Yeah, I didn't even know you had a private feed. Just upload to Nuget, Microsoft is paying ;-)

Also, I'll be testing on some older macOS's and will let you know if I run into anymore problems.

praeclarum on 12 Oct 2019

@praeclarum you could just create a nuget config and add the url: https://docs.microsoft.com/en-us/nuget/reference/nuget-config-file CI will pick it up :)

jamesmontemagno on 12 Oct 2019

@mattleibow Unfortunately 153 isn't working on OS X 10.11.4 (El Capitan).

I get the error "Could not initialize an instance of the type 'AppKit.NSOpenGLPixelFormat': the native 'init*' method returned nil.". Bug filed: https://github.com/mono/SkiaSharp/issues/977

@jamesmontemagno This is why I always test :-)

praeclarum on 12 Oct 2019

I've upgraded all nugets, deleted bin & obj, but no luck.
VS2019 16.3 PReview 2
SkiaSharp 1.68.1-rc.153
Windows WPF:

System.EntryPointNotFoundException: 'Unable to find an entry point named 'sk_refcnt_safe_unref' in DLL 'libSkiaSharp'.'

michaldobrodenka on 12 Oct 2019

I am using 1.68.1-rc.153 without any issues. Also on CI this works for multiple platforms. (MacOS, Linux, Windows)

Gillibald on 12 Oct 2019

Sorry guys, ignore my comments about this exception in WPF. I had a custom build step which replaced libraries and with wrong ones.

Now everything works with r 153!

(one thing had to be fixed: shaping text now need setting Utf8 encoding to paint before shaping string text and setting to glyph when drawing text)

michaldobrodenka on 28 Oct 2019

@michaldobrodenka Can you give me an example how you are drawing the text?

Gillibald on 28 Oct 2019

@Gillibald To draw a text is not easy. Without HarfBuzz its more like a debug or something, not really useful in real app - only basic english alphabet is rendered correctly (so no localization), RTL/LTR is not observed, rendering text using harfbuzz results in much crisper result etc.

So you have to use Harfbuzz, split text into RTL/LTR/Neutral segments and each segment render separately using harfbuzz. My simplified version is 780 lines long and it is tied in my more complex framework which I wrote to create SkiaSharp multiplatform UI controls. Text drawing was one of most complex chalenges in this framework, really unexpected, at beginning it seemed so simple, just draw text usinng Canvas.DrawText. I started with Canvas.DrawText, then with extension DrawShapedText and now I wrote my own methods with RTL/LTR segments etc.

Another challenge is font fallback (useful when you combine more fonts - emoticons with latin script, arabic - you probably need 3 fonts) I cheated and merged used fonts into one.

I don't know If I'm doing it correctly, but seems to be working

michaldobrodenka on 28 Oct 2019

@michaldobrodenka I am the maintainer of HarfBuzzSharp 😀
I just wanted to investigate what is happening when you have to set TextEncoding to UTF8

Gillibald on 28 Oct 2019

Haha, sorry :D Thank you for work!

There is a change in getting Buffer from string, which requires setting encoding in paint. In previous versions getting harfbuzz Buffer from string was done always in Utf8 I think. I can share more details tomorrow.

michaldobrodenka on 28 Oct 2019

Updated to 1.68.1 last night. It crashes the app instantly... Downgrading to 1.68.0 works. I'll need to publish a version that works - and then I can add the stacktrace here if you want?

I'm on MacOS Catalina, VS 2019 Version 8.3.10 (build 2), Xamarin.Forms 4.3.0.991211