libpastry Integration — Approach#

Refs: #39|Draft

Goal#

Integrate libpastry for frosted glass effects, spring animations, and spinners across the installer UI.

Proposed approach#

1. Add libpastry as a Flatpak module in org.bootcinstaller.Installer.json
2. Create bootc_installer/utils/pastry_compat.py wrapper (may already exist as stub)
3. Apply frosted glass to: welcome screen background, progress screen overlay, credits window
4. Replace loading spinners with libpastry animated spinners
5. Add spring animations to carousel transitions and button press feedback

Files to touch#

• org.bootcinstaller.Installer.json (add libpastry module)
• bootc_installer/utils/pastry_compat.py (wrapper/facade)
• bootc_installer/views/progress.py (frosted glass overlay)
• bootc_installer/windows/dialog_credits.py (frosted glass)
• bootc_installer/views/welcome.py (frosted glass)
• .blp UI templates (glass CSS classes)

Open questions#

• libpastry API stability — which version to target?
• Performance impact on low-end hardware?
• Fallback when libpastry is unavailable?