Vector graphics pipeline

[kmcallister]

This is an alternate mode for the back part of the browser pipeline. "Rendering" means saving display list commands to a vector layer. "Compositing" involves positioning these in the viewport and computing a single z-index order for them, then calling Skia.

Applications:

• Printing
• Headless embedders that want to save PDF or SVG
• Servo as ebook reader, rendering through Quartz 2D or Cairo. This won't be usable as a full browser, because we can't easily mix OpenGL-composited and vector content. But it would handle a good chunk of existing Web content. Unclear if there are advantages over regular Servo.

Note that we will still do our own text shaping.

cc @SimonSapin

[polarathene]

Curious if there has been any progress with this? Is Servo able to print to PDF what it can render yet?

[jdm]

Nope!