Developed and integrated a smart integer scaling algorithm for video output in the libretro/RetroArch repository, focusing on enhancing display fidelity across diverse aspect ratios and resolutions. The approach intelligently selects between overscaling and underscaling, with an automatic fallback to non-integer scaling when underscale margins become excessively large, ensuring optimal visual quality. Addressed C89 compliance errors within the scaling module to maintain codebase standards and compatibility. The work leveraged C programming and embedded systems expertise, with a strong emphasis on video scaling techniques. This contribution improved the adaptability and robustness of RetroArch’s video output handling for a wide range of devices.