WPE WebKit Snap for Mir in kiosk mode

The WPE fork of WebKit, packaged as a snap for fullscreen use in kiosk applications.

Tested on:

• ✅ Ubuntu Desktop 18.04.02 LTS with weston/miral-kiosk
• ✅ Ubuntu Core with mir-kiosk on a Raspberry Pi 3

The snap should run on all snapd-supported distributions if you have a Wayland compositor running with the default socket at /run/user/0/wayland-0 (currently hardcoded, cf. this post on the snapcraft forum for details)

Features

• Fullscreen webview for any size or rotation passed by the Wayland compositor
• Configurable:
  • url: Accepts HTTP(S) URLs
  • devmode: Toggle Remote Inspector on/off
  • error-to-console: Logs JavaScript errors to the service log instead of the console, useful for remote debugging (check the logs with snap logs wpe-webkit-mir-kiosk.browser)
  • debug: Enables (very) verbose debug messaging by setting G_MESSAGES_DEBUG=all, LIBGL_DEBUG=verbose and WAYLAND_DEBUG=1. Useful only if the browser won't start at all or has critical rendering issues, as this will definitely spam your logs.
• Browsing works with auto-connected interfaces
• Ships manually connected interfaces for advanced use (Bonjour/zeroconf etc.)
• Exposes the com.igalia.Cog D-Bus service on the system bus. This allows snaps that plug this interface to remote-control the Cog browser with all commands that upstream cogctl currently provides. See snapcraft docs for more information.

Components

• WPE WebKit and its direct dependencies:
  • libwpe
  • WPE FDO backend
• Cog launcher/webapp container

Enable Hardware Acceleration

• Install mesa-core20 snap from snap store
  • snap install mesa-core20
  • For upstream supported graphics
    • snap connect wpe-webkit-mir-kiosk:graphics-core20 mesa-core20:graphics-core20
  • For specific hardware platform
    • snap connect wpe-webkit-mir-kiosk:graphics-core20 mesa-core20:graphics-core20
    • snap connect wpe-webkit-mir-kiosk:graphics-core20 vendor-mesa-core20:graphcis-core20