Cargo Features

[dependencies]
eye = { version = "0.5.0", default-features = false, features = ["jpeg"] }
default = jpeg

The jpeg feature is set by default whenever eye is added without default-features = false somewhere in the dependency tree.

jpeg default = jpeg-decoder

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

jpeg-decoder jpeg

Enables jpeg-decoder ^0.2.1