de2dcd1f77
PdfInkModule will notify PdfViewWebPlugin that a thumbnail update is necessary when the following events occur: - Drawing stroke finishes - Erasing stroke finishes - Undo - Redo Then PdfViewWebPlugin will get the thumbnail size from the PDF engine, generate a transparent thumbnail with the Ink strokes, and send that to the frontend. The frontend can then overlay this thumbnail on top of the thumbnail for the page contents. With two thumbnails, the relatively static page contents thumbnail does not need to be repeatedly regenerated. Bug: 353942908 Change-Id: I4adaac90d3c15aa723d42bfb9e9b95d0b7d77828 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5824214 Reviewed-by: Alan Screen <awscreen@chromium.org> Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com> Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Andy Phan <andyphan@chromium.org> Cr-Commit-Position: refs/heads/main@{#1351607}