Scanned PDF - rs

A fast, low memory footprint, simple images to PDF crate.

Features

• Fast Combine 1000 A4-sized images into a compressed PDF within a minute.
• Low memory footprint scannedpdf does not store the whole file in RAM. Typically, the memory footprint depends on the size of the individual images and does not exceed 100Mb.
• Simple Only focusing on converting images to PDF, scannedpdf provides deadly simple API.
• High compression rate Combine a total of 800Mb of images into a single 70Mb PDF. (Note: The compression rate depends on images. 768 A4-sized comic images were used in the test, split 50/50 between black and white and colour)
• Unicode outlines(bookmarks) support Outline titles are encoded in UTF-16BE. Every valid Unicode characters including emoji are displayed correctly.

Usage

1. Adding scannedpdf to your project dependencies by cargo add scannedpdf Note: by default, flate compression is enabled. Disable it by cargo add scannedpdf --no-default-features
2. View examples or documentation and get started.

Resources

• Docs.rs - scannedpdf
• Examples

Why another PDF lib?

I had been using printpdf before I started this project. I was working on a comic downloader that involved merging large numbers of images. printpdf didn't do very well in terms of memory, performance and compression. Also, printpdf cannot handle unicode text in bookmarks, which appears as garbled code on many devices.