PDF with embedded PNG renders incorrectly
Originator: | eric.sean.conner | ||
Number: | rdar://34276970 | Date Originated: | September 6 2017 |
Status: | closed | Resolved: | yes |
Product: | macOS, Preview | Product Version: | macOS 10.12.6 (16G29), Preview Version 9.0 (909.18) |
Classification: | Serious Bug | Reproducible: | Always |
Area: Preview The enclosed PDF renders incorrectly in Preview. It renders fine in Acrobat Reader and also when using Quick Look from the Finder. I have investigated the problem a bit and it seems to be related to the interplay between the embedded RGBA PNG and the associated SMask in the PDF. The image is specified as having /BitsPerComponent 16 whereas the SMask is specified as having /BitsPerComponent 8. The problem does not show up in files where these values are equal. Note: The included PDF was processed with QPDF (http://qpdf.sourceforge.net), to make it easier to debug. Version/Build: The problem exists in macOS 10.12.6 (16G29), Preview Version 9.0 (909.18) The same rendering problem exists in iOS 11 beta 9
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