[webkit-qt] Proposal for switching image decoders from Qt to WebCore
simon.hausmann at nokia.com
Fri Feb 10 02:21:41 PST 2012
I'd like to propose that we switch over to using the WebCore image decoders.
Zoltan has spent some time comparing performance and memory usage between the
ImageDecoderQt (and the qt plugins for image decoding) and the WebCore image
decoders, in https://bugs.webkit.org/show_bug.cgi?id=71555
My interpretation of the result is that performance and memory usage wise
there's not much of a difference. However the WebCore image decoders have some
advantages that are of a different nature:
1) They are an actively maintained piece of code. Unfortunately the Qt
image decoder plugins are subject to less tender loving care. The WebCore
decoders are used by pretty much all other ports, and from my totally biased
point of view we have also found them working great for the N9 with the Qt
2) They support image downsampling, which is particularly nice for mobile
devices with less memory than our gigabyte filled workstations.
3) The jpeg decoder supports progressive/interlaced jpegs, which is again
an nice thing for image loading over slow connections.
Therefore I'd like to re-open https://bugs.webkit.org/show_bug.cgi?id=32410 .
Any opinions / objections / thoughts?
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