Automated PDF Preflight and Risk Auditing with PDFium
Implement PDF preflight checks in Delphi with the PDFium C API: launch and JavaScript detection, effective image DPI maths, permission bits, and PDF/A claims
Software Development Blog
PDF Programming
General PDF Programming tutorials and guides
Building Accessible PDF Viewers with Text-to-Speech in Delphi
Wire SAPI word-boundary events to PDFium word geometry in Delphi: COM lifecycle on a speech thread, PDF-to-pixel transforms, and synchronised highlights
Continuous Scrolling PDF Viewer in Delphi with PDFium Component
Build a continuous-scroll PDF viewer in Delphi with PDFium Component: why rendering every page at once exhausts memory, and how visible-page rendering stays
Handling Hybrid-Reference PDFs from Office Applications in Delphi
Word and Excel export hybrid-reference PDFs carrying two cross-reference views. Learn to detect the /XRefStm trailer key in Delphi and process them safely
High-Speed AES-256 PDF Encryption for Massive Documents
Why AES-256 encryption of gigabyte PDFs is 500,000 small CBC operations, not one pass: CNG handle reuse, buffer reuse, and R6 KDF costs in Delphi
losLab PDF Libraries for Delphi: HotPDF, PDFium Component, and PDF Library for Delphi Compared
HotPDF creates PDF output and fills AcroForm fields in Delphi. PDFium Component renders and extracts text from existing PDFs. PDF Library for Delphi handles compliance
Memory-Safe PDF Parsing: Defending Against Malicious Documents
Defensive PDF parsing in Delphi: validate stream lengths and CCITT decode dimensions, bound xref offsets, cap decompression, and guard recursive structures
Optimising IO Performance for Gigabyte-Scale PDF Processing
Why 2 GB PDFs break full-file MapViewOfFile on 32-bit Delphi, and how a sliding 64 MB mapping window plus fewer ReadFile syscalls restores throughput
HotPDF Page Extraction Performance in Delphi
Extracting pages from a PDF should take seconds. This post traces real bottlenecks in HotPDF Delphi workflows and shows which API path restores expected speed
Scaling PDF Pages to 70% with the losLab PDF Library
How to scale every PDF page to 70% using CapturePage and DrawCapturedPage in the losLab PDF Library, with the centring maths and working C# and Delphi samples
RTF to PDF Conversion in Delphi with losLab PDF Library
Convert RTF to PDF in Delphi with losLab PDF Library: GetCanvasDC creates a virtual DC, EM_FORMATRANGE paginates the content, LoadFromCanvasDc saves each page