Bug 221542

Summary:

globalCompositeOperation has not effect on drawing a video to a canvas

Product:

WebKit

Reporter:

Nguyễn Hồng Phát <nguyenhongphat28121998>

Component:

Canvas

Assignee:

Said Abou-Hallawa <sabouhallawa>

Status:

NEW

Severity:

Normal

CC:

ahmad.saleem792, cdumez, changseok, dino, eric.carlson, esprehn+autocc, ews-watchlist, glenn, gyuyoung.kim, jer.noble, karlcow, philipj, sabouhallawa, sergio, simon.fraser, smoley, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 14

Hardware:

Unspecified

OS:

Unspecified

See Also:

https://bugs.webkit.org/show_bug.cgi?id=209802

Attachments:

Description	Flags
Expect	none
Actual	none
Patch	none
Patch	simon.fraser: review+, ews-feeder: commit-queue-

Nguyễn Hồng Phát

Reported 2021-02-08 02:57:05 PST

Created attachment 419570 [details] Expect Step 1: draw an image with transparent background on canvas Step 2: set globalCompositeOperation = "source-in" Step 3: draw video on canvas Expected: video is clipped inside image Actual: all video is draw on canvas, no clip Demo: https://nguyenhongphat0.github.io/demo-bug-reporting/safari-source-in-video-issue/with-video.html The above demo is working as expected on Chrome/Firefox. On Safari it's not working

Attachments
Expect (1.32 MB, image/png) 2021-02-08 02:57 PST, Nguyễn Hồng Phát	no flags	Details
Actual (1.19 MB, image/png) 2021-02-08 02:59 PST, Nguyễn Hồng Phát	no flags	Details
Patch (1.72 KB, patch) 2021-02-10 01:11 PST, Said Abou-Hallawa	no flags	Details Formatted Diff Diff
Patch (22.97 KB, patch) 2021-02-11 01:18 PST, Said Abou-Hallawa	simon.fraser: review+ ews-feeder: commit-queue-	Details Formatted Diff Diff
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.

Nguyễn Hồng Phát

Comment 1 2021-02-08 02:59:08 PST

Created attachment 419572 [details] Actual

Smoley

Comment 2 2021-02-09 16:05:08 PST

Thanks for filing, I can reproduce this issue on Safari 13.1.3 as well as STP119.

Radar WebKit Bug Importer

Comment 3 2021-02-09 16:05:28 PST

<rdar://problem/74164352>

Said Abou-Hallawa

Comment 4 2021-02-10 01:11:02 PST

Created attachment 419826 [details] Patch

Simon Fraser (smfr)

Comment 5 2021-02-10 09:11:40 PST

Needs a test.

Said Abou-Hallawa

Comment 6 2021-02-11 01:18:59 PST

Created attachment 419962 [details] Patch

Ahmad Saleem

Comment 7 2022-10-25 15:11:14 PDT

I am able to reproduce this issue on Safari 16.1 from the testcase in Comment 0 and also checked with BugID on Webkit GitHub and it seems this r+ patch didn't landed. Just wanted to update. Thanks!

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