1623638 - Support adding "external image" surfaces with scaling in the compositor interface

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, enhancement, P3)

Description

[Jeff Muizelaar [:jrmuizel]]

The main motivation for this is being able to scale video using the os compositor.

Comment 1

[Markus Stange [:mstange]]

Glenn, I remember you telling me about an API sketch for this at some point. Do you still recall what it looked like?

Comment 2

[Glenn Watson [:gw]]

I don't recall exactly - the basic idea was that an external image could be annotated with a flag (either on the image or prim) saying that this video should be handled as a native surface, rather than WR allocating a native surface and drawing into it.

Then, WR compositor interface would effectively see this surface as a placeholder, and ask the Compositor trait to add it to the scene at the correct time / location.

We can perhaps discuss in a zoom call if we want to sketch out something more detailed than that.

Comment 3

[Matt Woodrow (:mattwoodrow)]

Discussed this with Glenn a bit more.

We can add scaling to the Compositor API separately from adding support for external images.

I'll split off a separate bug just for the scaling subset, and start working on that.

Comment 4

[Markus Stange [:mstange]]

This was taken care of in bug 1653048, right? Or are you planning to do anything else in this bug?