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Sometimes when removing the popup window in Sculpt's Leitzentrale, a few residual pixels remained. This is caused by the too strict coupling of drawing and sync handling, effectively executing the fb-sync handler repeatedly via 'Main::mark_as_damaged' during 'refresh_view' calls. This tight coupling has two unwelcome effects. First, the sync handling is executed more often than needed. Second, the sync handling (and fb flushing) happens at intermediate states when view-stack changes are applied (like changing a view geometry). This patch uses a local signal handler to defer the execution of the sync code until all drawing has finished. Issue #5347 Issue #5356
This source-code repository contains genuine low-level OS components and interfaces of Genode. It solely depends on the framework's base API.