Is there any way to make GlInterface useable outside "gl-methods"

[Supheria]

GlInterface or its reference seems to be invalid outside "gl-methods" such as OnOpenGlInit, OnOpenGlRender, etc.

For example, I create a Silk.Net.OpenGLES.GL object named Gl by GlInterface.GetProcAddress, then I want to use Gl inside OnKeyDown like:

switch (e.Key)
{
    case Key.B:
        Alpha = !Alpha;
        if (Alpha)
        {
            Gl.Enable(EnableCap.Blend);
            Gl.Disable(EnableCap.DepthTest);
        }
        else
        {
            Gl.Disable(EnableCap.Blend);
            Gl.Enable(EnableCap.DepthTest);
        }
        break;
}

But the porperty of Gl happens no change. I also tried to use in OnSizeChanged, setting Gl.ViewPort to new bounds, and again nothing changes to Gl.

All of these settings above will be effective in "gl-methods". Does GlInterface active only inside "gl-methods", or something I did wrong?

[maxkatz6]

It is expected. You should record your operations on UI thread, such as enabling/disabling blend capability, and invalidate visual, which will request next render frame.

And read these operations inside of OnOpenGlRender.

[maxkatz6]

There is nothing rendering inside of KeyDown method, so these operations otherwise would be undefined behavior. Which is why it is not allowed.

[Supheria]

I see. Would any rendering performance be lost, that a lot of Gl properties are set in every rendering frame? Maybe I can use indicators like bool IsSizeChange to call Gl.ViewPort inside OnOpenGlRender or not, is this what you mean?

[Supheria]

I see. Would any rendering performance be lost, that a lot of Gl properties are set in every rendering frame? Maybe I can use indicators like bool IsSizeChange to call Gl.ViewPort inside OnOpenGlRender or not, is this what you mean?

Since I want to implement 60 fps rendering, OnOpenGlRender is expected to be called many times in a second.

[maxkatz6]

You can use these indicators, sure.