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
Software Development Blog
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 smooth.
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 PDFlibPas Compared
HotPDF creates PDF output and fills AcroForm fields in Delphi. PDFium Component renders and extracts text from existing PDFs. PDFlibPas handles compliance signing.
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 centering math 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.