Semi.Avalonia/demo/Semi.Avalonia.Demo.Drm/README_CN.md

DRM启动步骤

English

(Ubuntu 20.04 live server linux-x64 虚拟机测试成功)
(Orange Pi Zero2 Ubuntu20.04-arm64 测试成功)

Avalonia 官方参考文档

搭建运行环境

1. Linux端运行命令

sudo apt update
sudo apt upgrade
sudo reboot
sudo apt-get install libgbm1 libgl1-mesa-dri libegl1-mesa libinput10

2. 安装测试工具(出现一个彩色立方体说明环境安装完成)

sudo apt-get install kmscube
sudo kmscube

3. 安装.net运行时

4. NuGet里面添加Avalonia.LinuxFramebuffer包

dotnet add package Avalonia.LinuxFramebuffer

5. 添加StartLinuxDrm代码

public static int Main(string[] args)
{
    var builder = BuildAvaloniaApp();
    if (args.Contains("--drm"))
    {
        SilenceConsole();
        // By default, Avalonia will try to detect output card automatically.
        // But you can specify one, for example "/dev/dri/card1".
        return builder.StartLinuxDrm(args: args, card: null, scaling: 1.0);
    }

    return builder.StartWithClassicDesktopLifetime(args);
}

private static void SilenceConsole()
{
    new Thread(() =>
        {
            Console.CursorVisible = false;
            while (true)
                Console.ReadKey(true);
        })
        { IsBackground = true }.Start();
}

6. 发布程序到Linux

dotnet publish demo/Semi.Avalonia.Demo.Drm/Semi.Avalonia.Demo.Drm.csproj -c Release -r linux-x64 --sc -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true

AOT发布需要在csproj文件中添加以下代码

<PropertyGroup>
    <PublishAot>true</PublishAot>
    <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>
</PropertyGroup>

dotnet publish demo/Semi.Avalonia.Demo.Drm/Semi.Avalonia.Demo.Drm.csproj -c Release -r linu-x64

7. 运行程序

sudo ./Semi.Avalonia.Demo.Drm --drm

报错处理

1. 报错内容

Unhandled exception. Avalonia.Markup.Xaml.XamlLoadException: No precompiled XAML found for avares://Semi.Avalonia/Themes/Light/Light.axaml (baseUri: avares://Semi.Avalonia/Themes/Index.axaml), make sure to specify x:Class and include your XAML file as AvaloniaResource

解决方法：

如果使用Semi发布文件不要裁剪，如果裁剪会报错。

24.8.18更新：现在已经修复了这个问题。

2. 报错内容

Unhandled exception. System.TypeInitializationException: The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.** **--->System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies.In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: liblibSkiaSharp: cannot open shared object file: No such file or directory at SkiaSharp.SkiaApi.sk_colortype_get_default_8888() at SkiaSharp.SKImageInfo..cctor()

解决方法：

Linux 命令行安装

sudo apt-get install -y libfontconfig1  

参考网址

3. 报错内容

Permission denied

解决方法：

添加执行权限

sudo chmod +x ./Semi.Avalonia.Demo.Drm

4. 报错内容

Unhandled exception. System.ComponentModel.Win32Exception (95): drmModeGetResources failed at Avalonia.LinuxFramebuffer.Output.DrmResources..ctor(Int32 fd, Boolean connectorsForceProbe) in //src/Linux/Avalonia.LinuxFramebuffer/Output/DrmBindings.cs:line 91 at Avalonia.LinuxFramebuffer.Output.DrmCard.GetResources(Boolean connectorsForceProbe) in //src/Linux/Avalonia.LinuxFramebuffer/Output/DrmBindings.cs:line 171 at Avalonia.LinuxFramebuffer.Output.DrmOutput..ctor(String path, Boolean connectorsForceProbe, DrmOutputOptions options) in //src/Linux/Avalonia.LinuxFramebuffer/Output/DrmOutput.cs:line 60 at LinuxFramebufferPlatformExtensions.StartLinuxDrm(AppBuilder builder, String[] args, String card, Double scaling, IInputBackend inputBackend) in //src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs:line 166 at Semi.Avalonia.Demo.Drm.Program.Main(String[] args)

解决方法：

program.cs的显卡路径错误，可能不是dev/dri/card1，看在dev/dri目录下有无其他的显卡如card0。

24.8.18更新：现在Avalonia会自动检测显卡路径，所以不需要指定显卡路径。

return builder.StartLinuxDrm(args: args, card: null, scaling: 1.0);

5. 报错内容

Unhandled exception. System.ComponentModel.Win32Exception (2): Couldn't open /dev/dri/card1 at Avalonia.LinuxFramebuffer.Output.DrmCard..ctor(String ) in //src/Linux/Avalonia.LinuxFramebuffer/Output/DrmBindings.cs:line 167 at Avalonia.LinuxFramebuffer.Output.DrmOutput..ctor(String , Boolean , DrmOutputOptions ) in //src/Linux/Avalonia.LinuxFramebuffer/Output/DrmOutput.cs:line 58 at LinuxFramebufferPlatformExtensions.StartLinuxDrm(AppBuilder, String[], String , Double , IInputBackend ) in /_/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs:line 166 at Semi.Avalonia.Demo.Drm.Program.Main(String[])

解决办法：

找不到显卡路径dev/dri/card1，可能是显卡挂载到别的文件夹下了。

24.8.18更新：现在Avalonia会自动检测显卡路径，所以不需要指定显卡路径。

return builder.StartLinuxDrm(args: args, card: null, scaling: 1.0);