Regression: CGImageSource doesn't render background image of certain PDFs

Number:rdar://45338633 Date Originated:17 Oct 2018
Status:Open Resolved:
Product:macOS SDK Product Version:10.14 (18A391)
Classification:Serious Bug Reproducible:Always
Core Graphics


CGImageSource as of Mohave is no longer able to render the background images for certain PDFs coming out of Adobe Illustrator. This is a regression because on earlier macOS versions this worked fine.

Steps to Reproduce:

Build&run the provided sample app on Mohave

Expected Results:

- you should see the background image with the woman

Actual Results:

- you only see some text and boxes in the foreground, the background where the image with the woman should be, is left blank
- On the console you see the output:
   [Cocoanetics.CGImageSourcePDFBug] img_alphamerge_stage: Assertion failed - unknown source alpha


macOS 10.14 (18A391)


The PDFs with which CoreGraphics has a problem with actually come out of Adobe InDesign CC2018, not Illustrator as I originally wrote.

By oliver.drobnik at Oct. 17, 2018, 5:34 p.m. (reply...)

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