The interface of line algorithm. More...

Inheritance diagram for nana::paint::image_process::line_interface:

Public Member Functions
virtual	~line_interface ()=default

virtual void	process (paint::pixel_buffer &pixbuf, const point &pos_beg, const point &pos_end, const ::nana::color &, double fade_rate) const =0
	Draws a line. More...

Detailed Description

The interface of line algorithm.

Constructor & Destructor Documentation

virtual nana::paint::image_process::line_interface::~line_interface ( )

virtualdefault

virtual void nana::paint::image_process::line_interface::process	(	paint::pixel_buffer &	pixbuf,
		const point &	pos_beg,
		const point &	pos_end,
		const ::nana::color &	,
		double	fade_rate
	)		const

pure virtual

Draws a line.

Semantics:

pixbuf = pixbuf * (1 - fade_rate) + color * fade_rate

The two points are calculated by Nana, they are always valid, and pos_beg.x <= pos_end.x

Parameters

pos_beg	left point
pos_end	right point
fade_rate	blend rate in the range of [0, 1] If not 0, the line is blended to the pixbuf