[Webkit-unassigned] [Bug 136968] New: Safari 7.0 and Webkit have a color rendering bug for sRGB tagged images

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Sep 19 17:38:57 PDT 2014


           Summary: Safari 7.0 and Webkit have a color rendering bug for
                    sRGB tagged images
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.9
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jvandela at gmail.com

A new bug was introduced with Safari 7.0 and Webkit on Mac OS X Mavericks that makes the gamma display of sRGB images incorrect. Shadow tones display too dark as it appears Webkit does not use the sRGB tone curve but a straight 2.2 gamma (which is wrong). Safari 6 and before did not have this bug and they displayed sRGB images correctly. I illustrate the issue here: http://lagemaat.blogspot.com/2014/09/color-management-in-safari-is-broken-in.html The image should be identical on mouseover in a correctly color managed browser but as you can see it is not. You can also see this on other test pages such as http://www.gballard.net/psd/go_live_page_profile/embeddedJPEGprofiles.html where you'll see the dark tones shifting considerably blocking up shadows in Safari 7.0 and Webkit nightly.

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