Armando Doval developed a smart integer scaling algorithm for video output in the libretro/RetroArch repository, focusing on improving display fidelity across diverse aspect ratios and resolutions. His approach intelligently selected between overscaling and underscaling, introducing a fallback to non-integer scaling when overscale margins became too large, thereby optimizing visual quality for a range of devices. Working primarily in C and leveraging his expertise in embedded systems and video scaling, Armando also addressed C89 compliance errors within the scaling module. The work demonstrated a thoughtful balance between algorithmic complexity and practical usability, resulting in a robust enhancement to RetroArch’s video output capabilities.