Bug 247669

Summary:	[LBSE] Enforce presence of a RenderSVGViewportContainer, even if the <svg> has no children
Product:	WebKit	Reporter:	Nikolas Zimmermann <zimmermann>
Component:	SVG	Assignee:	Nikolas Zimmermann <zimmermann>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	rbuis, sabouhallawa, webkit-bug-importer, zimmermann
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	90738

Description Nikolas Zimmermann 2022-11-09 02:44:54 PST

The anonymous RenderSVGViewportContainer, enclosing all descendants of the outermost <svg> element, is usually created when the first child is supposed to be added to the <svg> element. This logic fails, if there is no descendant. This creates problems when one wants to compute getCTM() / getScreenCTM() matrices for such a <svg> element -- the viewBox transformation would be ignored, since it is supposed to be handled via the RenderSVGViewportContainer, which is not there -> fix that.

Comment 1 Nikolas Zimmermann 2022-11-09 03:16:46 PST

Pull request: https://github.com/WebKit/WebKit/pull/6293

Comment 2 EWS 2022-11-12 07:58:23 PST

Committed 256604@main (e9c7dfad5a10): <https://commits.webkit.org/256604@main>

Reviewed commits have been landed. Closing PR #6293 and removing active labels.

Comment 3 Radar WebKit Bug Importer 2022-11-12 07:59:19 PST

<rdar://problem/102275206>