1429471 - Dropping support for subpixel AA in SVG

Status: RESOLVED WONTFIX

(Core :: Graphics: WebRender, enhancement, P1)

Description

[Jeff Muizelaar [:jrmuizel]]

We don't really have a good way to implement this with blob images. Is this ok?

Comment 1

[Markus Stange [:mstange]]

I think this is ok. We could still support it for opaque SVGs if we want.

Comment 2

[Jeff Muizelaar [:jrmuizel]]

(In reply to Markus Stange [:mstange] from comment #1)
> I think this is ok. We could still support it for opaque SVGs if we want.

I do too. We do have a bunch of reftests that compare text in svgs and html text and we fail them because of no subpixel aa.

Comment 3

[Aria Beingessner [:Gankra]]

Attachment: failures.txt

At least 17 tests (attached) are currently failing on windows ci because of this.

Comment 4

[Aria Beingessner [:Gankra]]

Attachment: failures.txt

Found some tests that also use svg text as a mask

Comment 5

[Aria Beingessner [:Gankra]]

Fuzziness values can be extracted from 

https://treeherder.mozilla.org/#/jobs?repo=try&revision=1793dfceeded3fba0239db7cfee7f4419911360c&selectedJob=155320960

for whoever does this (probably me)

Comment 6

[Aria Beingessner [:Gankra]]

(oops wrong issue)

Comment 7

[Markus Stange [:mstange]]

We don't have any plans to address this, as far as I know, and that's fine.

Comment 9

[Alice0775 White]

http://findyourfamilytree.com/images/JPKennedyDescFan.html
Some characters with many strokes become illegible with WebRender

Comment 10

[Alice0775 White]

Attachment: screenshot comparison Webrender on/off

ugly rendering with WebRender