Bug 212405

Summary: Support density-corrected size from EXIF metadata
Product: WebKit Reporter: Noam Rosenthal <noam>
Component: ImagesAssignee: Noam Rosenthal <noam>
Status: NEW ---    
Severity: Normal CC: ap, cdumez, changseok, colin, esprehn+autocc, ews-watchlist, glenn, gyuyoung.kim, japhet, kondapallykalyan, pdr, sabouhallawa, simon.fraser, steven
Priority: P2    
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=145380
Bug Depends on: 217821, 217820    
Bug Blocks:    
Attachments:
Description Flags
Patch none

Description Noam Rosenthal 2020-05-27 05:07:03 PDT 
A new proposal to the HTML spec, following lack of traction to Content-DPR: https://bugs.webkit.org/show_bug.cgi?id=145380

The proposal is to use 5 EXIF attributes (XDimension/YDimension/XResolution/YResolution/ResolutionUnit) to allow an image to declare its "intrinsic preferred size" and "intrinsic resolution" - and only if they match each other, affect its intrinsic (natural) size accordingly.

Creating this bug to follow progress, in parallel with a similar Chromium bug, and the proposals to HTML spec. 

WICG: https://discourse.wicg.io/t/proposal-exif-image-resolution-auto-and-from-image/4326/24
HTML spec proposal: https://github.com/whatwg/html/pull/5574
WPT: https://github.com/web-platform-tests/wpt/pull/23789
Chromium bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1069755
Comment 1 Noam Rosenthal 2020-07-20 06:35:18 PDT 
Created attachment 404712 [details]
Patch
Comment 2 Noam Rosenthal 2020-07-20 06:36:50 PDT 
(In reply to Noam Rosenthal from comment #1)
> Created attachment 404712 [details]
> Patch

Uploaded a dry-run patch. It contains most of the bits and pieces, but waiting for the security issue with image metadata to be resolved before continuing (https://github.com/w3c/csswg-drafts/issues/5165#)