Report-an-Apple-Bug Friday! 58

2007-05-12 00:02:18 UTC

Slightly late because I had to devise a way to determine whether a GIF file is interlaced. (I settled on GifBuilder, in case you’re curious.) This ties in with the next two bugs; I’ll blog both at once next week.

This bug is NSImageInterlaced documented as working on half of known interlaceable types. It was filed on 2007-05-12 at 00:27 PDT.


Summary:

The NSImageInterlaced property is documented as only working on PNG files, despite GIF also supporting interlacing.

Steps to Reproduce:

  1. Read the documentation of NSImageInterlaced.

Expected Results:

It describes NSImageInterlaced as applying to both PNG and GIF.

Actual Results:

It describes NSImageInterlaced as only applying to PNG.

Regression:

None known.

Notes:

It is possible to do interlacing in TIFF. The downsides are greater file size and the possibility that some readers may not understand the file.

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