Build for Linux ARM32 (armhf) and ARM64 (aarch64)

[mattleibow]

Description of Change

Add a new Linux architecture: armhf

This is build on Ubuntu 16.04 using the ARM prebuilt toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads

Using GCC because of: #1382 (comment)

Test Binaries

Built using Clang:

• ARM 32 v7a: native_linux_arm_linux.zip
• ARM 64 v8: native_linux_arm64_linux.zip

Built using GCC:

• ARM 32 v7a: native_linux_arm_gcc_linux.zip
• ARM 64 v8: native_linux_arm64_gcc_linux.zip

Test NuGet

All the packages are on the preview feed as v2.80.0-pr.1382.31: https://aka.ms/skiasharp-eap/index.json

Bugs Fixed

• Related to issue More Pre-Built Linux Libraries #453

[mattleibow]

This script is not complete nor does it work.

Seems libjpeg-turbo is having some issues:

• Cross compile for armhf with neon == error: instruction requires: NEON libjpeg-turbo/libjpeg-turbo#440
• https://groups.google.com/g/skia-discuss/c/ZG784t39JyU
• https://groups.google.com/g/skia-discuss/c/SGA9UVxjabc

[mattleibow]

The extra args are for this issue:

• https://groups.google.com/g/skia-discuss/c/b29ZStY3Kak
• https://gcc.gnu.org/gcc-7/changes.html

[mattleibow]

arm64 or aarch64 images are built using --build-arg

[jmacato]

@mattleibow the Linux ARM64 bins are almost working, though my app had this error:

Unhandled exception. System.EntryPointNotFoundException: Unable to find an entry point named 'sk_paint_set_text_encoding' in shared library 'libSkiaSharp'.
   at SkiaSharp.SkiaApi.sk_paint_set_text_encoding(IntPtr param0, SKTextEncoding param1)
   at Avalonia.Skia.FormattedTextImpl..ctor(String text, Typeface typeface, Double fontSize, TextAlignment textAlignment, TextWrapping wrapping, Size constraint, IReadOnlyList`1 spans)
   at Avalonia.Skia.PlatformRenderInterface.CreateFormattedText(String text, Typeface typeface, Double fontSize, TextAlignment textAlignment, TextWrapping wrapping, Size constraint, IReadOnlyList`1 spans)
   at Avalonia.Media.FormattedText.get_PlatformImpl()
   at Avalonia.Media.FormattedText.get_Bounds()

@Gillibald should we perhaps update SkiaSharp in Avalonia?

[Gillibald]

@jmacato This is targeting the next release. We should be able to update.

[jmacato]

@Gillibald awesome :)) well... guess i cant test stuff out without us updating

[Gillibald]

The new version is a 1:1 replacement just bump the version number. We can just create a PR that does that and you could use the CI build.

[jmacato]

@Gillibald yeah please do, so we can check other issues here just in case

[mattleibow]

@jmacato what happens if you bump the version of SkiaSharp in your project to the latest preview on NuGet. Unless Avalonia is p/invoking directly, it should work. The versions should be API compatible as I made no breaks in the .NET API.

[jmacato]

@mattleibow i'll try the preview releases first

[Gillibald]

I am in the process of creating a PR that changes Avalonia to use the preview. Then you just have to copy the ARM bits manually.

[jmacato]

@Gillibald alright i'll wait for that instead :D

[mattleibow]

CI just failed on the emscripten lols. Why now? Who knows. Maybe a rebuild will fix it?

[mattleibow]

Hopefully #1387 will fix it...

[dinonovak]

any change to build this for v2.80.2 ?

[mattleibow]

This is already out on the SkiaSharp.NativeAssets.Linux packages

[dinonovak]

Found it , sorry for confusion.

[mattleibow]

No prob. Let me know if there are any problems by opening a new issue. Have fun drawing!

[aicynide]

Not working in android