Firefox OS/1UA Multi-Screen

Introduction

Goal

Our mission is to support "1 UA multi-screen" rendering on FxOS. Try imagine the following scenario, you have a computer set up in duel monitors, launch a Firefox browser on your primary display, launch another Firefox browser(or open a link in new window), and drag that new window to the secondary monitor. Our concept is similar but slightly different, where the baseline of this project is to allow a FxOS device connect and render contents to any non-FxOS display, or device that doesn't support Firefox browser.

Requirements

• Connect with external displays
  • For wireless connection, we have implemented Wifi Display with Miracast protocol. That is, any device capable of being a Miracast Sink, can be connected with a FxOS device.
  • For wired connection, we have implemented the HDMI output. This requires support of hotplug detection in Hardware Composer.
• Open multiple top-level windows on FxOS
  • Gecko supports opening multiple top-level windows on browser naturally, however, FxOS supports single top-level window only.
• Manage multi-screen in System App

Architecture Designs

Overview

This is an overview structure design from top to down.

Gecko

Design structure of gecko's part.

Gaia

Design structure of gaia's part.