11.0.0-preview3

[danwalmsley]

• stable browser-wasm target.
• stable ios / android

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This discussion was created from the release 11.0.0-preview3.

[pereg-1985]

Hello. I am informing you about a serious bug that exists in Avalonia starting from 11.0.0-preview-2 version.

When creating a publish version of the project on Avalonia, the finished program starts, hanging for a couple of seconds and breaks.

Everything is fine with the debug and release versions of the project. But it is impossible to make a ready release of the program.
I use version 11.0.0-preview-1, I can't update it. The problem is not solved.

AvaloniaTest.mp4

[maxkatz6]

Please open an issue with more details and how you build the project.

[pereg-1985]

Details in this video:

AvaloniaProject.mp4

[BAndysc]

Try to remove obj/ and bin/ folders, I had similar problems in the past when upgrading Avalonia, it wasn't rebuilding everything properly resulting in something similar.

[maxkatz6]

RuntimeIdentifier must be win7-x64, not win-x64.

[pereg-1985]

Thank you, it works.

[efef77]

Issue regarding ICustomDrawOperation:

When porting a Skia custom rendering application using "ICustomDrawOperation" from version 0.10.18 to 11.0.0 prevew-3 i had to do a lot of reflection to gain the SKCanvas which was hidden behind private members like this.

public void Render(IDrawingContextImpl context) {
    // Avalonia 0.10.18 method
    //var canvas = (context as ISkiaDrawingContextImpl)?.SkCanvas;

    // Avalonia 11.0.0 preview method
    var fi = context.GetType().GetField("_impl",
        BindingFlags.NonPublic | BindingFlags.Instance);
    var impl = (Avalonia.Platform.IDrawingContextImpl)fi.GetValue(context);
    var pi = impl.GetType().GetProperty("Canvas",
        BindingFlags.Public | BindingFlags.Instance);
    var canvas = (SkiaSharp.SKCanvas)pi.GetValue(impl);

    if (canvas != null) {
        RenderAction?.Invoke(canvas);
    }
}

Perhaps this was not the best method or otherwise the final version should allow a better public access to the SKCanvas.
May be some one can pick this up? Thank you.

[maxkatz6]

Check this API
#8656

[efef77]

Thank you maxkatz6,

it looked good but did not work. The code below passed the compiler so it looked promising:

var skia = context.GetFeature<ISkiaSharpApiLeaseFeature>();
SKCanvas canvas2 = skia.Lease().SkCanvas;

At runtime i gained the very same SkCanvas object but it did not render. So the canvas object gets prepared not the same way but i coud not find out the difference. Regards efef77.

[maxkatz6]

SKCanvas canvas2 = skia.Lease().SkCanvas;

Please follow the "using" patter with disposable objects.
This canvas is "alive" and can be used only inside of the Render method.

[efef77]

Hi maxkatz6,
it worked disposing the Lease (not the canvas) like this:

public void Render(IDrawingContextImpl context) {
    // Avalonia 11.0.0 preview feature method
    var skia = context.GetFeature<ISkiaSharpApiLeaseFeature>();
    using (var lease = skia.Lease()) {
        SKCanvas canvas = lease.SkCanvas;
        if (canvas != null) RenderAction?.Invoke(canvas);
    }
}

Thank you for helping.

[lukaszossowski]

Is there any documentation on the new AvaloniaMainActivity and AvaloniaSplashActivity? Upgrading the packages to preview 3 informs me that there no longer is an AvaloniaActivity which breaks the project.

[maxkatz6]

Check new xplat templates, they were updated