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PeterK · 25 November 2019, 12:45

There is only one longword in the first PNG image that has been trashed by something, and then also a new CRC checksum was generated when the icon was written back from memory to disk, probably after the drawer window information was updated.

I have no idea where that trashing longword came from ???

The TrueColor images are always stored in their compressed IDAT or zlib format in memory. Therefore, a short trashing affects all the following data and not just a few pixels and consequently it causes an error in decompression.

25 November 2019, 12:45	#3179
PeterK Registered User Join Date: Apr 2005 Location: digital hell, Germany, after 1984, but worse Posts: 3,365	There is only one longword in the first PNG image that has been trashed by something, and then also a new CRC checksum was generated when the icon was written back from memory to disk, probably after the drawer window information was updated. I have no idea where that trashing longword came from ??? The TrueColor images are always stored in their compressed IDAT or zlib format in memory. Therefore, a short trashing affects all the following data and not just a few pixels and consequently it causes an error in decompression. Last edited by PeterK; 25 November 2019 at 14:11.