#!/usr/bin/mscgen -Tpng

msc {
	hscale="1.5";

	c [label = "compositor"], w [label = "libweston core"],
	b [label = "backend"];

	|||;

	--- [label = "Compositor creates an output for a head"];

	c box c [label = "Have an existing head to process."];
	c => w [label = "weston_compositor_create_output()"];
	w => b [label = "weston_backend::create_output()"];
	w << b [label = "an empty output, no hw resources"];
	w => b [label = "weston_output::attach_head()"];
	w << b [label = "success"];
	c << w [label = "success"];

	c abox c [label = "optionally more heads with weston_output_attach_head() for hardware clone mode."];

	c :> w [label = "weston_output_set_scale()"];
	c :> w [label = "weston_output_set_transform()"];
	c :> b [label = "backend specific settings via plugin API"];
	c => w [label = "weston_output_enable()"];
	w => b [label = "weston_output::enable()"];
	b box b [label = "hw resource allocation"];
	w << b [label = "success"];
	c << w [label = "success"];
}