Bug 257110

Summary:	Implement a reliable way to get the image type from a mime type
Product:	WebKit	Reporter:	Said Abou-Hallawa <sabouhallawa>
Component:	Images	Assignee:	Said Abou-Hallawa <sabouhallawa>
Status:	NEW ---
Severity:	Normal	CC:	sabouhallawa, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Said Abou-Hallawa 2023-05-21 22:52:04 PDT

UTTypeCreatePreferredIdentifierForTag() is used to get the image type from the mime type only on macOS. On iOS, utiFromImageBufferMIMEType() handles only three image formats manually: png, jpeg and gif. On macOS and with user created with "sysadminctl", UTTypeCreatePreferredIdentifierForTag() fails to return valid image type for the mime type "image/png".

Comment 1 Said Abou-Hallawa 2023-05-21 22:52:42 PDT

rdar://107625991

Comment 2 Said Abou-Hallawa 2023-05-21 23:22:18 PDT

Pull request: https://github.com/WebKit/WebKit/pull/14163