1715803 - SVG with transparency appears blurry

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[James Wilson]

Attachment: demo-reactance.svg

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0

Steps to reproduce:

Certain SVG files started appearing blurred on my own site in recent releases of Firefox. These images were crisp in releases in May 2021, but now appear blurred. Other SVGs that do not use transparency appear unaffected. I created a simple page that renders a example SVG (attached) as a minimal working example.

<!DOCTYPE html>
<body>
<img src="demo-reactance.svg">
</body>
</html>

Actual results:

When rendered on a page, the SVG file appears with some elements blurred and pixelated. When the image is viewed separately ("Open image in new tab"), it appears crisp. Graphics appear crisp when viewed on Chrome as well.

Expected results:

SVG should appear with crisp edges.

Comment 1

[Robert Longson [:longsonr]]

If this is a recent regression can you please use https://mozilla.github.io/mozregression/ to determine a regression range?

Comment 2

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 3

[Jamie Nicol [:jnicol]]

Can reproduce on Linux also. Mozregression gives me this: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=d7a58cff3e920dfbfdfe29c76a2822f7b916c0d3&tochange=411d3031b1b4c0f8b9ff3009ceb21ba4cfdc601e

Comment 4

[James Wilson]

Output from mozregression, seems plausible since it has to do with display & blending.

2021-06-10T10:07:27.232000: DEBUG : Found commit message:
Bug 1540737 - Don't use PushLayerWithBlend since it's not implemented by all backend. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D115432

2021-06-10T10:07:27.232000: DEBUG : Did not find a branch, checking all integration branches
2021-06-10T10:07:27.235000: INFO : The bisection is done.
2021-06-10T10:07:27.236000: INFO : Stopped

Comment 5

[Matt Woodrow (:mattwoodrow)]

Attachment: Bug 1715803 - Paint blend mode temporary surfaces in device space. r?jrmuizel

Comment 6

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1540737

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/2c4c38e037f0
Paint blend mode temporary surfaces in device space. r=jrmuizel

Comment 8

[Marian-Vasile Laza]

Backed out changeset 2c4c38e037f0 (Bug 1715803) for causing crashtest failures in 1513133.html
Backout link
Push with failures
Failure Log

Comment 9

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/802fef618855
Paint blend mode temporary surfaces in device space. r=jrmuizel

Comment 10

[Dorel Luca [:dluca]]

Backed out changeset 802fef618855 (bug 1715803) for Crashtest failures in gfx/tests/crashtests/1513133.html. CLOSED TREE

Log:
https://treeherder.mozilla.org/logviewer?job_id=342923855&repo=autoland&lineNumber=9742

Push with failures:
https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&revision=802fef6188555fbda869d2c83a4b319b1d56c90b

Backout:
https://hg.mozilla.org/integration/autoland/rev/312cc8376783278d7a60a4e4daddafd54decedfe

Comment 11

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c7cb63e18471
Paint blend mode temporary surfaces in device space. r=jrmuizel

Comment 12

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/c7cb63e18471

Comment 13

[BugBot [:suhaib / :marco]]

The patch landed in nightly and beta is affected.
:mattwoodrow, is this bug important enough to require an uplift?
If not please set status_beta to wontfix.

For more information, please visit auto_nag documentation.

Comment 14

[Matt Woodrow (:mattwoodrow)]

I don't think we need to worry about trying to uplift this.