Mir 2.21 is now available with cursor scaling, mouse keys, and Wayland enhancements. This Canonical-backed library simplifies Wayland shell development, offering better configuration, accessibility, and display management. Download Mir 2.21 on GitHub today!
Introduction to Mir 2.21
The latest Mir 2.21 release is now available, offering significant improvements for developers working on Wayland-based shells and desktop environments.
As a Canonical-backed project, Mir provides essential libraries to simplify Wayland compositor development, making it a critical tool for Linux desktop innovation.
This update introduces cursor scaling support, mouse key implementation, new configuration options, and multiple Wayland extension enhancements—ensuring better performance and accessibility for modern Linux environments.
Key Features & Enhancements in Mir 2.21
1. Cursor Scaling Support
Mir 2.21 now supports dynamic cursor scaling, allowing for smoother cursor rendering across different display resolutions—essential for high-DPI and multi-monitor setups.
2. Mouse Keys Implementation
Enhancements in input handling include full mouse key support, improving accessibility and control for users who rely on keyboard-driven navigation.
3. Improved Configuration Options
Key repeat rate/delay customization for better keyboard responsiveness.
Configurable display properties for optimized multi-output setups.
Enhanced settings merging to prevent conflicts in user configurations.
4. Wayland Extensions & Surface Management
XDG toplevel tiled states for better window management.
Refactored BasicSurface for easier integration by shell developers.
Updated core Wayland protocols for improved compatibility.
5. Accessibility & Display Improvements
Output filtering for accessibility tools.
DRM format validation to ensure supported display modes.
User data association with layouts for custom shell behavior.
Why Mir 2.21 Matters for Wayland Developers
Wayland is the future of Linux display protocols, and Mir simplifies compositor development by handling low-level complexities. With Canonical’s backing, Mir ensures stability and long-term support, making it ideal for:
Desktop environment developers (e.g., GNOME, KDE integrations).
Embedded systems requiring lightweight Wayland shells.
Accessibility-focused projects leveraging mouse key and output filtering.
Download & Further Details
Get the latest Mir 2.21 release on GitHub. For developers, this update brings critical refinements that streamline Wayland shell development while enhancing usability and performance.
Frequently Asked Questions (FAQ)
Q: Is Mir a replacement for X11 or Wayland?
A: No, Mir is a library for building Wayland compositors, not a display server itself. It simplifies development for Wayland-based environments.
Q: How does Mir compare to wlroots?
A: While wlroots is another Wayland compositor library, Mir is backed by Canonical and focuses on ease of integration for Ubuntu and related projects.
Q: Can Mir be used for non-Linux systems?
A: Currently, Mir is optimized for Linux-based environments, particularly those using Wayland.
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