804893 - Refactor shadow layers

Status: RESOLVED FIXED

(Core :: Graphics: Layers, defect)

Description

[Nick Cameron [:nrc]]

Refactor the layers system so that all shadow layers backends use a single layer manager and a backend-specific compositor. Start by refactoring the OGL layers backend into a CompositorOGL for OMTC and LayerManagerOGL for on-MTC.

Comment 1

[Nick Cameron [:nrc]]

Work is happening on the graphics branch.

Comment 2

[Nick Cameron [:nrc]]

Currently TODO before a first, imperfect landing: Tiled Thebes layers, fix canvas layers, a few minor OGL tidy ups.

Once we've landed that, need to change (simplify) the API for Texture clients, work on a better API for texture client factories, implement a PTexture IPDL protocol for direct communication between texture clients and hosts (remove Update() from TextureHost).

Comment 3

[Florian Bender]

There are many box-shadow (and text-shadow) bugs that may be touched by the refactoring. Should I list them here (I cannot add them as depending or dependant, though)?

Comment 4

[Nick Cameron [:nrc]]

(In reply to Florian Bender from comment #3)
> There are many box-shadow (and text-shadow) bugs that may be touched by the
> refactoring. Should I list them here (I cannot add them as depending or
> dependant, though)?

How will they be affected? 'Shadow' in the context of this bug means the copy of the layer tree present on the compositor thread, not shadows as in box-shadow.

Comment 5

[Florian Bender]

Oh, sorry, that's indeed something very different! Now all this stuff makes a lot more sense to me …