[Webkit-unassigned] [Bug 259970] New: Overflow is visible in SVG view

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=259970

            Bug ID: 259970
           Summary: Overflow is visible in SVG view
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Mac (Intel)
                OS: macOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: cyberalien at gmail.com
                CC: sabouhallawa at apple.com, zimmermann at kde.org

Created attachment 467228

  --> https://bugs.webkit.org/attachment.cgi?id=467228&action=review

Simple bug demo (HTML, SVG) and a screenshot of bug

When SVG sprite is used as background image and element's aspect ratio does not match view's aspect ratio, Safari shows overflow. This causes an issue with SVG sprites because it shows part of a different icon.

Steps to recreate:
- Create SVG sprite with 2 icons, add 2 views for them with different viewBox: `0 0 24 24` and `0 25 24 24`, so they are placed vertically one after another.
- In HTML create a span element that uses that sprite as background image, targeting second view. Set height of element bigger than width.
- Span element will render part of icon it should not render.
- Change to overflow for view in sprite has no effect.


Also tested in:
- Firefox: OK
- Chrome: cannot be tested because of a different bug in Chrome that prevents sprite from even displaying correctly

Possible related bug, though I'm not sure if it is a bug in Safari or Firefox: initial position for background image is different. Firefox defaults to `0% 0%`, Safari defaults to `50% 50%`. Also shown in test case.

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