CIRCUS is best known as the developer of Da Capo series. They use a properitary format to store their image assets. These files have the file extension CRX. Not to be confused with Google Chrome extension format, whose file extension is also CRX.

This repository is a Rust implementation of GarBRO's CRX decoder. It is cross-examined with another available decoder implementation.

This tool is provided as a library. A sample converter is located at bin/convert. To build the converter, run

cargo build --release --package crx-convert

The simple converter accepts any number of CRX file paths as command line arguments, and convert them into PNG at the same location of the original files.