Bug 247042

Summary:

TextureMapper: Calculate the bounding box of a layer transformed by 4x4 matrix precisely by intersecting with the viewport

Product:

WebKit

Reporter:

Fujii Hironori <Hironori.Fujii>

Component:

Platform

Assignee:

Nobody <webkit-unassigned>

Status:

NEW ---

Severity:

Normal

CC:

webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
test case	none

Description Fujii Hironori 2022-10-25 18:28:29 PDT

Created attachment 463245 [details]
test case

bug#244824 added transformedBoundingBox to calculate the bounding box of a layer transformed by 4x4 matrix.
However, it isn't precise.
For example, in the test case, the right side of the blue element is at infinity.
transformedBoundingBox is assuming the positions of the right side are (inf, inf) and (-inf, -inf).
We can calculate more precise bounding box by intersecting element edges with the viewport.

Comment 1 Radar WebKit Bug Importer 2022-11-01 18:29:17 PDT

<rdar://problem/101835693>