[Webkit-unassigned] [Bug 114331] New: WebView color management differs from Safari

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=114331

           Summary: WebView color management differs from Safari
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Minor
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jonathan at e3software.com


CSS colors appear to render in a different color space when the HTML document is loaded in Safari versus loaded in a WebView (from the Obj-C WebKit.framework).

Specifically, the document at http://ethreesoftware.com/misc/colortest.html has a background-color of rgb(70, 130, 180). When Safari renders the document and a screenshot is taken (PNG tagged with the current display profile), sampling the background pixels in Photoshop yields the correct rgb(70, 130, 180) values. If you load the exact same document inside of a WebView, take a screenshot, and sample the background pixels, the colors are instead rgb(58, 128, 182). Example screenshot at http://ethreesoftware.com/misc/webview-left-safari-right.png.

Not sure what might be going on here. Is the WebView not using NSDeviceRGBColorSpace but Safari is? Is there some kind of OpenGL surface interaction that's going on? The above results seem consistent no matter what application I test with (i.e. WebViews in Apple Mail, in third-party apps like Coda, and in reduced test-case apps consisting of just a window and a WebView—all render the "wrong" color).

OS X 10.8.3 (12D78), Safari 6.0.3 (8536.28.10)

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.