[Webkit-unassigned] [Bug 183153] New: Animated GIF imagery with finite looping are falling one loop short

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Feb 26 15:34:05 PST 2018


            Bug ID: 183153
           Summary: Animated GIF imagery with finite looping are falling
                    one loop short
           Product: WebKit
           Version: Safari 11
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aedge at thefuelagency.com.au

Created attachment 334654

  --> https://bugs.webkit.org/attachment.cgi?id=334654&action=review

Animated .GIF set to play 3 times.

A GIF created in Photoshop to loop X times is actually playing X-1 times in Safari.
As with the current Chrome release, Webkit is failing to count the initial playback before applying the loop count.

Photoshop (or any GIF) set to play 3 times
Result is GIF with "2 loops"
aka. Intial playback + 2 loops = 3

In Safari for MacOS and iOS, the playback count is failing to include the initial play-through. It falls one loop short.
See Chromium Bug (fix implemented) here: https://bugs.chromium.org/p/chromium/issues/detail?id=815038

These animations play correctly in IE and Firefox browsers

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