libsdl-org/libtiff
Dec 2025 – Apr 2026
5 Months active
Languages Used
BashCC++CMakePowerShellShellYAMLtext
Technical Skills
ANSI C standardsBuild AutomationBuild ConfigurationBuild system configurationC programmingC++
Roger Leigh
PROFILE
Roger Leigh
Over five months, Roger Leigh modernized and maintained the libsdl-org/libtiff repository, focusing on C and C++ code quality, portability, and build reliability. He enhanced type safety and const correctness throughout the TIFF library, refactored casting logic, and introduced stricter compiler warnings to catch subtle bugs. Roger improved cross-platform CI/CD pipelines using Docker, Bash scripting, and CMake, enabling reproducible builds on Windows, macOS, and FreeBSD. His work included static analysis integration, code formatting with clang-format, and targeted bug fixes in image processing and configuration handling. These efforts strengthened maintainability, reduced technical debt, and improved downstream reliability for library consumers.
Overall Statistics
Feature vs Bugs
69%Features
Repository Contributions
116Total
Bugs
12
Commits
116
Features
27
Lines of code
355,852
Activity Months5
Your Network
30 peopleShared Repositories
30
Work History
April 2026
47 Commits • 13 Features
Apr 1, 2026April 2026 — LibTIFF: Robustness, correctness, and maintainability improvements across core codebase.
47 Commits • 13 Features
Apr 1, 2026April 2026 — LibTIFF: Robustness, correctness, and maintainability improvements across core codebase.
April 2026
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for libsdl-org/libtiff: Focused feature work delivered a targeted enhancement to TIFF thumbnail processing by enabling 32-bit multiply support via _TIFFMultiply32. This required adding tiffiop.h to thumbnail.c and committing the change. No major bug fixes were recorded in this scope. Impact: improves image processing capabilities in TIFF thumbnails, supporting higher precision operations for downstream pipelines; demonstrates solid C-level code changes, header management, and repository discipline.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for libsdl-org/libtiff: Focused feature work delivered a targeted enhancement to TIFF thumbnail processing by enabling 32-bit multiply support via _TIFFMultiply32. This required adding tiffiop.h to thumbnail.c and committing the change. No major bug fixes were recorded in this scope. Impact: improves image processing capabilities in TIFF thumbnails, supporting higher precision operations for downstream pipelines; demonstrates solid C-level code changes, header management, and repository discipline.
February 2026
9 Commits • 1 Features
Feb 1, 2026February 2026: LibTIFF CI/CD modernization and cross-platform build improvements. Delivered Docker-based Windows, Cygwin, and MinGW builds with dedicated runners, improved environment setup and PATH handling, and containerized MSVC builds for VS2022/VS2026 to enhance reliability and reproducibility.
9 Commits • 1 Features
Feb 1, 2026February 2026: LibTIFF CI/CD modernization and cross-platform build improvements. Delivered Docker-based Windows, Cygwin, and MinGW builds with dedicated runners, improved environment setup and PATH handling, and containerized MSVC builds for VS2022/VS2026 to enhance reliability and reproducibility.
February 2026
January 2026
1 Commits
Jan 1, 2026January 2026: Delivered a type-safety refactor in the TIFF library of libtiff to improve correctness and maintainability without impacting user-facing behavior. Replaced casts to long with appropriate unsigned long or size_t, reducing type-related risks across platforms and simplifying future maintenance. The change improves reliability for downstream consumers and aligns with ongoing code-quality initiatives.
January 2026
1 Commits
Jan 1, 2026January 2026: Delivered a type-safety refactor in the TIFF library of libtiff to improve correctness and maintainability without impacting user-facing behavior. Replaced casts to long with appropriate unsigned long or size_t, reducing type-related risks across platforms and simplifying future maintenance. The change improves reliability for downstream consumers and aligns with ongoing code-quality initiatives.
December 2025
58 Commits • 12 Features
Dec 1, 2025December 2025 - LibTIFF libtiff: Delivered significant C++ modernization, portability, and CI enhancements with business value and long-term maintainability in focus. Key outcomes include: Key features delivered - C++ compatibility and type-safety improvements: explicit void* casts for memory allocations; fixes around enum usage; removal of register keyword; broad type-conversion hardening to support C++17+ builds. - Const correctness and data immutability: TIFFCodec::name, TIFFField::field_name, and TIFFFieldInfo::field_name converted to const char*, safer handling of dynamic names with local buffers, and proper freeing casts. - Build system and CI improvements: new CMake options for C++ compatibility checks and a mode to compile C sources as C++17; expanded CI environments including Windows, macOS, and FreeBSD; per-libtiff CI scoping; pre-build compatibility checks; vcpkg usage scoped to libtiff; additional warnings and pedantic checks. - Endianness/portability and guards: modernised endianness checks; corrected HAVE_GETOPT/HAVE_UNISTD_H usage; added LZMA version guards; WORDS_BIGENDIAN macro reliability. - Quality and tooling enhancements: added a broad set of extra compiler warnings (-Wnull-dereference, -Wshadow, -Wconversion, etc.); repository metadata and pre-build static test sources; CI cleanups for portability and warning handling. Major bugs fixed - Control flow: prevented goto bypassing variable initialization, preserving proper initialization semantics. - Compiler warnings/format: aligned printf/format strings with arguments; expanded -W warnings across compilers; improved MSVC warning handling. - Portability: fixed WORDS_BIGENDIAN handling and related macros to improve cross-platform behavior. Overall impact and accomplishments - Reduced C++ friction for library consumers, enabling safer C++17+ usage and easier migration from C to C++. Strengthened cross-platform reliability (Windows/macOS/FreeBSD) and CI coverage, enabling earlier detection of compatibility issues. The build and CI improvements position LibTIFF for scalable contributions and faster iteration. Technologies/skills demonstrated - C/C++ modernization (explicit casts, const correctness, enum safety) - Advanced CMake techniques and C++ compatibility testing - Cross-platform CI orchestration and build hygiene - Portability engineering (endianness, HAVE checks, warnings)
58 Commits • 12 Features
Dec 1, 2025December 2025 - LibTIFF libtiff: Delivered significant C++ modernization, portability, and CI enhancements with business value and long-term maintainability in focus. Key outcomes include: Key features delivered - C++ compatibility and type-safety improvements: explicit void* casts for memory allocations; fixes around enum usage; removal of register keyword; broad type-conversion hardening to support C++17+ builds. - Const correctness and data immutability: TIFFCodec::name, TIFFField::field_name, and TIFFFieldInfo::field_name converted to const char*, safer handling of dynamic names with local buffers, and proper freeing casts. - Build system and CI improvements: new CMake options for C++ compatibility checks and a mode to compile C sources as C++17; expanded CI environments including Windows, macOS, and FreeBSD; per-libtiff CI scoping; pre-build compatibility checks; vcpkg usage scoped to libtiff; additional warnings and pedantic checks. - Endianness/portability and guards: modernised endianness checks; corrected HAVE_GETOPT/HAVE_UNISTD_H usage; added LZMA version guards; WORDS_BIGENDIAN macro reliability. - Quality and tooling enhancements: added a broad set of extra compiler warnings (-Wnull-dereference, -Wshadow, -Wconversion, etc.); repository metadata and pre-build static test sources; CI cleanups for portability and warning handling. Major bugs fixed - Control flow: prevented goto bypassing variable initialization, preserving proper initialization semantics. - Compiler warnings/format: aligned printf/format strings with arguments; expanded -W warnings across compilers; improved MSVC warning handling. - Portability: fixed WORDS_BIGENDIAN handling and related macros to improve cross-platform behavior. Overall impact and accomplishments - Reduced C++ friction for library consumers, enabling safer C++17+ usage and easier migration from C to C++. Strengthened cross-platform reliability (Windows/macOS/FreeBSD) and CI coverage, enabling earlier detection of compatibility issues. The build and CI improvements position LibTIFF for scalable contributions and faster iteration. Technologies/skills demonstrated - C/C++ modernization (explicit casts, const correctness, enum safety) - Advanced CMake techniques and C++ compatibility testing - Cross-platform CI orchestration and build hygiene - Portability engineering (endianness, HAVE checks, warnings)
December 2025
Activity
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Quality Metrics
Correctness97.2%
Maintainability93.8%
Architecture94.0%
Performance94.0%
AI Usage22.2%
Skills & Technologies
Programming Languages
BashCC++CMakePowerShellShellYAMLtext
Technical Skills
ANSI C standardsBash scriptingBuild AutomationBuild ConfigurationBuild SystemsBuild system configurationC programmingC++C++ compatibilityC++ developmentC++ programmingCI/CDCMakeCMake configurationCode Quality Improvement
Repositories Contributed To
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