Render of OpenGlControlBase on Android seems strange

[Supheria]

I've tried triangle tutorial of opengl-es, but it only renders within left-bottom block of the screen on Android, which works alright on Windows. I don't know what's wrong. You can see screen-shots below:

I test in simulator and real device both, conditions are same

Seems good on windows

The sample project: AvaloniaOpenGlLeran

[Supheria]

It could be solved by using render scaling in gl.ViewPort: #17958

protected override void OnOpenGlRender(GlInterface gl, int fb)
{
    ...

    var toplevel = TopLevel.GetTopLevel(this);
    var scaling = toplevel?.RenderScaling ?? 1;
    gl.Viewport(0, 0, (int)(Bounds.Width * scaling), (int)(Bounds.Height * scaling));

    ...
}