[Webkit-unassigned] [Bug 103796] New: [chromium] ImageDecodingStore should cache partially decoded images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103796

           Summary: [chromium] ImageDecodingStore should cache partially
                    decoded images
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: hclam at google.com
                CC: senorblanco at chromium.org, jamesr at chromium.org,
                    vangelis at chromium.org, enne at google.com,
                    nduca at chromium.org, qinmin at chromium.org


Current implementation does not cache partially decoded images. The result is that when an image is partially decoded, the bitmap and corresponding ImageDecoder is deleted. The means any subsequent decoding will have to start from scratch.

Redoing image decoding many times is very expensive and should be avoided. The solution to this is to cache partially decoded bitmap together with the ImageDecoder.

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