EXCEEDS logo
Exceeds
Katharine Chui

PROFILE

Katharine Chui

Worked on enhancing input and haptic support in SDL-related repositories, focusing on cross-platform driver development and memory safety. In shadps4-emu/ext-SDL, added support for the Logitech G27 racing wheel’s shifter input, refining input handling logic to improve compatibility and accurately report device state. Contributed to libsdl-org/SDL by implementing a memory-managed effects array for haptic feedback, enabling external verification and preventing memory leaks. Addressed Windows-specific issues by disabling the LG4FF HIDAPI driver to avoid incompatibilities with hid.dll, stabilizing force feedback and LED control. Demonstrated expertise in C programming, input handling, and haptic feedback implementation across diverse hardware environments.

Overall Statistics

Feature vs Bugs

67%Features

Repository Contributions

3Total
Bugs
1
Commits
3
Features
2
Lines of code
43
Activity Months2

Work History

January 2026

2 Commits • 1 Features

Jan 1, 2026

January 2026: Key SDL contributions in libsdl-org/SDL focused on stability, memory safety, and enhanced haptic capabilities. Key features delivered: - Haptic Effects Array: introduced an effects array with memory allocation and cleanup to support external checking and prevent memory leaks, improving reliability and testability of the haptic subsystem. Major bugs fixed: - Disabled LG4FF HIDAPI driver on Windows due to hid.dll incompatibility with 7-byte reports, preventing force feedback and LED control failures and stabilizing runtime behavior. (Commit: 6c2f9bc41e8667a0002d14307a566ec1b53345e5) Overall impact and accomplishments: - Stabilized Windows haptic behavior and LED control by removing a driver that could not handle platform-specific report sizes. - Improved memory safety and observability in the haptic subsystem, enabling external verification of effects. - Clearer defaults and reduced risk of regressions related to HIDAPI on Windows, contributing to safer releases. Technologies/skills demonstrated: - C programming, HIDAPI integration, Windows-specific handling, memory management and cleanup, commit-driven development, and focus on cross-platform stability.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for shadps4-emu/ext-SDL focusing on feature delivery and technical achievements. The work centered on enhancing hardware input compatibility by adding support for a commonly used racing wheel (Logitech G27) and refining input capture paths to improve SDL library integration.

Activity

Loading activity data...

Quality Metrics

Correctness86.6%
Maintainability80.0%
Architecture80.0%
Performance80.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

C

Technical Skills

C ProgrammingC programmingDriver DevelopmentInput Handlingcross-platform developmentdriver developmentgame developmenthaptic feedback implementation

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

libsdl-org/SDL

Jan 2026 Jan 2026
1 Month active

Languages Used

C

Technical Skills

C programmingcross-platform developmentdriver developmentgame developmenthaptic feedback implementation

shadps4-emu/ext-SDL

May 2025 May 2025
1 Month active

Languages Used

C

Technical Skills

C ProgrammingDriver DevelopmentInput Handling