How to handle multiple clipping rectangles in a CanvasItem?

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:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By rraallvv
:warning: Old Version Published before Godot 3 was released.

Let’s say I have a CanvasItem that needs to draw the background first, occupying the entire item rect, and then draw all its content within a smaller rect leaving a margin.

How should this be done in the NOTIFICATION_DRAW within _notofication?

This is what I’ve tried:

void MyCustomItem::_notification(int p_what) {

	case NOTIFICATION_DRAW: {
		// Enable clipping
		VisualServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), true);
		
		draw_background();
		
		// Clip to margins
		VisualServer::get_singleton()->canvas_item_set_custom_rect(get_canvas_item(), true, Rect2(
			Point2(
			 MARGIN_LEFT,
			 MARGIN_TOP
			),
			Size2(
			 width - MARGIN_LEFT - MARGIN_RIGHT,
			 height - MARGIN_TOP - MARGIN_BOTTOM
			)
		));

		draw_stuff();
	}

The problem with this is that it will clip everything to the margins including the background.