The interface of a blend algorithm. More...

Inheritance diagram for nana::paint::image_process::blend_interface:

Public Member Functions
virtual	~blend_interface ()=default

virtual void	process (const paint::pixel_buffer &src_pixbuf, const nana::rectangle &src_area, paint::pixel_buffer &dest_pixbuf, const nana::point &dest_pos, double fade_rate) const =0
	Blends two images with specified area and blend rate. More...

Detailed Description

The interface of a blend algorithm.

Constructor & Destructor Documentation

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

virtualdefault

virtual void nana::paint::image_process::blend_interface::process	(	const paint::pixel_buffer &	src_pixbuf,
		const nana::rectangle &	src_area,
		paint::pixel_buffer &	dest_pixbuf,
		const nana::point &	dest_pos,
		double	fade_rate
	)		const

pure virtual

Blends two images with specified area and blend rate.

Semantics:

dest_pixbuf = dest_pixbuf * fade_rate + scr_pixbuf * (1 - fade_rate);

The area is always valid, it is calculated by Nana before passing to the algorithm. So the area could be applied without a check.

Parameters

fade_rate blend rate in the range of [0, 1]