linebender/druid

X11 shell should use timers for fallback painting.

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#1186 opened on Sep 6, 2020

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help wantedmaintenanceshell/x11

Description

The fallback painting code should be changed to use timers. Right now it uses the idle loop, but this isn't ideal: it forces us to either write a bunch of special-case code for painting or else rate-limit the idle loop to avoid painting to often (this is the current state).

Contributor guide

Tech stack
rust
Domain
backendperformance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Rust programmingDruid architecture
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Look into the X11 shell painting code in druid, specifically the fallback painting implementation that uses the idle loop. Investigate how timers are already used in other parts of druid's event loop (e.g., in the winit backend) and plan a refactor to replace the idle loop with a timer based approach. Examine any related comments or linked issues that might specify expected behavior or API preferences. Since there are no comments or PRs, the maintainer's intent is primarily described in the issue body.