Issue 14632 in skia: Graphical issue with AMD GPU and SkBlendMode::kOverlay

[alexi… via monorail]

Status: Untriaged
Owner: ----
Priority: Medium
Type: Defect

New issue 14632 by alexi...@slatedigital.com: Graphical issue with AMD GPU and SkBlendMode::kOverlay
https://bugs.chromium.org/p/skia/issues/detail?id=14632

What steps will reproduce the problem?

Build the "HelloWorld" example from the skia official repository, replacing the "HelloWorld::onPaint" method's with the one provided in the fiddle.

What is the expected output? What do you see instead?

The expected output is the one from the fiddle, or from the file "skia_bug_expected.png", instead I see the content of the file "skia_bug_unexpected.png"

What version of the product are you using? On what operating system?

SK_GL backend
tested on branch chrome/m116
Windows 11
GPU AMD RX550

can't reproduce on the same machine with an intel integrated GPU, NVIDIA GTX 1060, or raster.

Please submit a code sample via fiddle.skia.org showing the issue.

https://fiddle.skia.org/c/8e3193ddf4a9bcef9d4b51313241498f

Provide any additional information below.

I don't see any issue with others blendmodes, and it seems to appear when there is a shader + overlay blend mode + several layers

Thanks

Attachments:
skia_bug_expected.png 8.8 KB
skia_bug_unexpected.png 10.8 KB

--
You received this message because:
1. The project was configured to send all issue notifications to this address

You may adjust your notification preferences at:
https://bugs.chromium.org/hosting/settings

[brian… via monorail]

Updates:
Labels: Area-GPU

Comment #1 on issue 14632 by brian...@google.com: Graphical issue with AMD GPU and SkBlendMode::kOverlay
https://bugs.chromium.org/p/skia/issues/detail?id=14632#c1

Over to GPU gardener for further triage.

[micha… via monorail]

Updates:
Owner: nicol...@google.com
Status: Accepted

Comment #2 on issue 14632 by michae...@google.com: Graphical issue with AMD GPU and SkBlendMode::kOverlay
https://bugs.chromium.org/p/skia/issues/detail?id=14632#c2

Assigning to Nicolette, who started investigating it last week as gardener.