1124535 - Check if we have a downscaler before using it to avoid assertions when decoding progressive JPEGs

Status: RESOLVED FIXED

(Core :: Graphics: ImageLib, defect)

Description

[Seth Fowler [:seth] [:s2h]]

While trying to trigger bug 1124342, I was able to trip a different assertion on techcrunch.com. I forgot to check if we have a downscaler in one case in nsJPEGDecoder, which causes us to assert when we decode a progressive JPEG.

Comment 1

[Seth Fowler [:seth] [:s2h]]

Attachment: Check if we have a downscaler before using it in nsJPEGDecoder

Here's the patch.

Comment 2

[Seth Fowler [:seth] [:s2h]]

Thanks for the quick review! Pushed:

https://hg.mozilla.org/integration/mozilla-inbound/rev/eb0a79717181

Comment 3

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/eb0a79717181