[Webkit-unassigned] [Bug 207266] New: [Safari] WebDriver: screenshot ignores CSS transformations or WebGL content.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=207266

            Bug ID: 207266
           Summary: [Safari] WebDriver: screenshot ignores CSS
                    transformations or WebGL content.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebDriver
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com
                CC: bburg at apple.com

When using the WebDriver screenshot feature to take a snapshoot of the WebView, the snapshot produced ignores CSS transformations or WebGL content

For example, taking a screenshot of any of this URLs, will produce an incorrect screenshot:

1) http://wpt.live/css/css-transforms/perspective-origin-001.html 
On the screen you only see a green square (test passes), but on the screenshot you see the red square (like if the test has failed)

2) https://webkit.org/blog-files/3d-transforms/poster-circle.html
On the screen you see a cylinder moving, but on the screenshot you see flat squares (no cylinder form)

3) https://webglsamples.org/aquarium/aquarium.html
On the screen you see an aquarium and fishes moving, but on the screenshot you don't see the aquarium or any fish (just a grey area)


When using Chrome driver, the screenshot captures the expected content.

See https://bug-206514-attachments.webkit.org/attachment.cgi?id=388261 for a simple script with python and selenium to reproduce the issue.

This was fixed for WebKitGTK on bug 206514 and since we fixed it, we now pass more tests on wpt.fyi regarding css-transforms (like 30 more).

I'm opening this to report the same issue for Safari with the hope its fixed.

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