04-18-2018, 08:41 AM
(This post was last modified: 04-18-2018, 08:59 AM by rich2005.
Edit Reason: typo
)
A few tests for comparison:
Starting of with a jpeg 126 MB (98% quality) image size 10600 x 17000 pix -ish
Open in Gimp 1.8 GB, in memory. Duplicating layers to get to over 4 GB in Gimp and it does save as a Gimp xcf. File size = 1.28 GB
screenshot: https://i.imgur.com/TJ93PxK.jpg
Comment:
When saving as an xcf (and exporting as a jpeg) the save dialogue closed well before the image finished writing to disk. Do not assume the image is immediately saved and close down Gimp. Chances are you get a corrupt file.
AFAIK there is a 4 GB limit on Gimp 2.8 file size, although that must be a monster image. That limit is removed in Gimp 2.10
A test in Gimp 2.10 (2.9.9 in my linux machine) Added more to get 5 GB in memory. Saved in the new compression format which is not compatible with Gimp 2.8 It was slow writing to disk but the dialogue stayed open until the complete. This file size = 809 MB - a good saving in file size but did take 25 seconds to re-open.
screenshot: https://i.imgur.com/r3fZ2Tb.jpg
Starting of with a jpeg 126 MB (98% quality) image size 10600 x 17000 pix -ish
Open in Gimp 1.8 GB, in memory. Duplicating layers to get to over 4 GB in Gimp and it does save as a Gimp xcf. File size = 1.28 GB
screenshot: https://i.imgur.com/TJ93PxK.jpg
Comment:
When saving as an xcf (and exporting as a jpeg) the save dialogue closed well before the image finished writing to disk. Do not assume the image is immediately saved and close down Gimp. Chances are you get a corrupt file.
AFAIK there is a 4 GB limit on Gimp 2.8 file size, although that must be a monster image. That limit is removed in Gimp 2.10
A test in Gimp 2.10 (2.9.9 in my linux machine) Added more to get 5 GB in memory. Saved in the new compression format which is not compatible with Gimp 2.8 It was slow writing to disk but the dialogue stayed open until the complete. This file size = 809 MB - a good saving in file size but did take 25 seconds to re-open.
screenshot: https://i.imgur.com/r3fZ2Tb.jpg