v0.2.4 | CTM Fix & Formula Rendering

v0.2.4 Release

This release fixes a critical text positioning bug and adds formula extraction capabilities.

🐛 Bug Fixes

• CTM (Current Transformation Matrix) handling - Issue #11
  • CTM now correctly applied to text positions per PDF Spec Section 9.4.4
  • This fix affects text positioning across the entire library
  • Critical for production use with complex PDFs

✨ New Features

• Structure Tree Enhancements
  • /Alt (alternate description) parsing for accessibility text
  • /Pg (page reference) resolution - correctly maps structure elements to page numbers
• Formula Rendering (via FormulaRenderer module)
  • Extract formula regions as base64 images from rendered pages
• ConversionOptions Extensions
  • render_formulas - Enable formula image extraction
  • page_images - Include page screenshots
  • page_dimensions - Track page dimensions

🏆 Community Contributors

🐛➡️✅ @mert-kurttutan - Detailed bug report (#11) with reproducible sample PDF! Your report exposed a fundamental CTM transformation bug affecting text positioning across the entire library. This fix was critical for production use. 🎉

✅ Verification

• All text extraction tests pass
• CTM transformation validated on complex PDFs
• Formula rendering tested
• Regression tests added

📥 Installation

Rust (crates.io)

cargo add pdf_oxide

Python (PyPI)

pip install pdf_oxide

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Release Date: January 9, 2026
Branch: main
Tag: v0.2.4
Closes: #11