Libinput 1.32 adds circular scrolling support for circular touchpads, with the Panasonic CF-SV1 laptop as the primary use case. The release also introduces automatic drag lock at touchpad edges, customizable eraser button mapping for tablets, and integrates systemd 260+ udev features for device classification.
US patent 7415666B2 describes a method and system for navigating paginated content using page-based increments, allowing users to scroll through documents by exact page heights regardless of zoom level. The invention addresses the problem where Page Up/Down keys produce inconsistent results when zoom settings don't display full pages, ensuring the next page set displays from the same vertical position as the previous one.
An analysis of Adaptive Tile Refresh (ATR), the graphics technology powering the Commander Keen series on EGA-equipped PCs. ATR solved bandwidth limitations of the ISA bus by enabling smooth scrolling through VRAM management and CRTC registers, allowing the game to maintain 60Hz framerate despite the constraint of updating 32KiB of video memory per frame.