https://bugs.kde.org/show_bug.cgi?id=502303
Bug ID: 502303
Summary: File size growing on each save/export to an enormously
large
Classification: Applications
Product: krita
Version: 5.2.2
Platform: Ubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: File formats
Assignee: krita-bugs-n...@kde.org
Reporter: anto...@gmail.com
Target Milestone: ---
SUMMARY
Exporting/saving a file to TIFF makes the file size grow larger and larger on
each edit/save operation. Resulting file size can be more than 10 times larger
than required to store each pixel uncompressed. F.e. here comes result of
"identify" such a file:
01_dir_org_mask.tif TIFF 1877x954 1877x954+0+0 8-bit Grayscale Gray 18.7867MiB
0.000u 0:00.000
While simple calculation 1877 * 954 * 1(byte) = 1790658, that is approximately
1.71MiB of uncompressed data, 10 times as little as existing size!
STEPS TO REPRODUCE
1. Open an uncompressed TIFF file
2. Paint a stroke or do some other editing
3. Save/export file.
OBSERVED RESULT
File size grows by 1MiB on each such iteration
EXPECTED RESULT
File size to keep the same size.
SOFTWARE/OS VERSIONS
Operating System: Ubuntu 12
KDE Plasma Version: 5.27.12
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
ADDITIONAL INFORMATION
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