//! That module exports blending-related types and functions.
//!
//! Given two pixels *src* and *dst* – source and destination, we associate each pixel a blending
//! factor – respectively, *srcK* and *dstK*. *src* is the pixel being computed, and *dst* is the
//! pixel that is already stored in the framebuffer.
//!
//! The pixels can be blended in several ways. See the documentation of `Equation` for further
//! details.
//!
//! The factors are encoded with `Factor`.
/// Blending equation. Used to state how blending factors and pixel data should be blended.
/// Blending factors. Pixel data are multiplied by these factors to achieve several effects driven
/// by *blending equations*.