Combine High Resolution Artwork, Bug with JPGs?

Originator:mc
Number:rdar://15612746 Date Originated:2013-12-08
Status:Open Resolved:
Product:Developer Tools Product Version:5.0.2
Classification:Performance Reproducible:Always
 
In this Demo Project there is a PNG and JPEG represenation of the same PDF file (added for reference) which are Combined into a single Tiff thanks to the Combine Artwork Resolution Artwork build setting.

It seems the Lempel-Ziv and Welch encoding is not doing a great job with JPEGs, as the size of the resulting j-gruene.png file is as big as the size of the PNGs, which, obviously, defies the purpose of using a JPG.

See https://github.com/stuffmc/rdar-combine-highres

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