The tectonic_pdf_io crate

This crate is part of the Tectonic project. It provides the PDF, XDV, and image I/O capabilities of [XeTeX]’s xdvipdfmx as a crate, currently providing only a C API.

This crate depends on [libpng], which it attempts to find externally using [pkg-config] or [vcpkg]. It should be possible to create another “bridge” crate so that this external dependency could be avoided, but this hasn’t been done yet.

If your project depends on this crate, Cargo will export for your build script an environment variable named DEP_TECTONIC_PDF_IO_INCLUDE_PATH, which will be a semicolon-separated list of directories enabling your code to include the dpx-*.h headers.

You will need to ensure that your Rust code actually references this crate in order for the linker to include linked libraries. A use statement will suffice:

```rust

[allow(unused_imports)]

[allow(clippy::singlecomponentpath_imports)]

use tectonicpdfio; ```

Cargo features

This crate currently provides no Cargo features.