protected override void RenderClientContent(DrawBoard d, UpdateArea updateArea)
{
//****
//because our demo may run the 'manual GL code',
//(out of state-control of the shader share resource/ current program/ render tree/
//***
_painter.DetachCurrentShader();
_demo.Draw(_painter);
}
public override void CustomDrawToThisCanvas(DrawBoard canvas, Rectangle updateArea)
{
//****
//because our demo may run the 'manual GL code',
//(out of state-control of the shader share resource/ current program/ render tree/
//***
_painter.DetachCurrentShader();
_demo.Draw(_painter);
}