Bug 136968
| Summary: | Safari 7.0 and Webkit have a color rendering bug for sRGB tagged images | ||
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| Product: | WebKit | Reporter: | Jao van de Lagemaat <jvandela> |
| Component: | Images | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | ap, jvandela, thorton |
| Priority: | P2 | ||
| Version: | 528+ (Nightly build) | ||
| Hardware: | Mac (Intel) | ||
| OS: | OS X 10.9 | ||
Jao van de Lagemaat
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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Tim Horton
I think this is probably related to the fact that imageWithColorspace compares the image space to DeviceRGB, which never happens anymore. Ditto for the one in GraphicsLayerCA. But I thought that was OK, too. We'll see.