[Webkit-unassigned] [Bug 107097] New: Can't change image scaling algorithm from optimize-contrast

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107097

           Summary: Can't change image scaling algorithm from
                    optimize-contrast
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Minor
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: r2d2.art2005 at gmail.com


Created an attachment (id=183127)
 --> (https://bugs.webkit.org/attachment.cgi?id=183127&action=review)
Comparison: Midori left, Chromium right

I'm doing some test with Apple emoji. I've got images at 160px, but I need them smaller. Since I still don't know how smaller will they be, I didn't use an image editor to resize them.

When I tested images downscaled at 24px in Chromium, they showed fine and smooth. However, testing them in Midori (which uses WebKit), shows them aliased, as if using the optimize-contrast algorithm. So, I opened the Inspector to change the image-rendering property. The only values accepted are “-webkit-optimize-contrast” and “auto”. Trying “optimizeQuality” (which the Inspector autocompleted) showed an “Invalid property value” error, so I'm stuck with jaggy images.

What I'm really curious about is if Chromium also uses WebKit, why does it scale images correctly but WebKit itself doesn't?

I'm using Ubuntu 12.04, with WebKitGTK+ 1.8.3 (which doesn't seem to correspond to any of the versions suggested by Bugzilla).

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