Full support for zip and rar files

Ideas for improvements and requests for new features in XnView Classic

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Euphoria
Posts: 7
Joined: Sun May 25, 2014 11:51 pm

Re: Full support for zip and rar files

Postby Euphoria » Wed Feb 22, 2017 7:26 pm

heimaki wrote:i wonder why should i store images in a zip? most modern image formats are compressed already, so i fail to see any advantage of doing so.

The reasons are numerous, and storing images in ZIP or RAR format is not often about compression, but that is also a valid reason for popular image formats that are not compressed.
Often people have a library that consists of many images and it can be efficient to consolidate those images into a ZIP file, much in the same way as a Virtual disk might operate.
For example, someone with a large collection of images may want to consolidate images into a ZIP/RAR file to help mitigate file fragmentation across the drive, and/or to reduce wasted cluster space on a given filesystem.

Also, utilizing ZIP or RAR to compress images that do not support compression or files that need to remain natively uncompressed in a workflow would allow the ability to add transparent compression of images without violating the workflow environment.
There are a number of file formats that can be saved without compression, or that do not support compression, or need to remain uncompressed for compatibility with various other programs. BMP, uncompressed TIFF, uncompressed PNG, TGA, just to name a few.

heimaki
Posts: 42
Joined: Thu Dec 27, 2012 8:04 pm

Re: Full support for zip and rar files

Postby heimaki » Thu Feb 23, 2017 11:35 am

For example, someone with a large collection of images may want to consolidate images into a ZIP/RAR file to help mitigate file fragmentation across the drive, and/or to reduce wasted cluster space on a given filesystem.

a ZIP will be fragmented too, and cluster size on modern files systems are that small, it' not worth bothering at all (NTFS has 4kb as standard even on 4TB drives).

There are a number of file formats that can be saved without compression, or that do not support compression, or need to remain uncompressed for compatibility with various other programs. BMP, uncompressed TIFF, uncompressed PNG, TGA, just to name a few.

seriously, who uses BMP or TGA these days? why would i use uncompressed PNG or TIFF?


and every time you open an image in your archive it has to be unpacked into a temp directory. again and again and again.

but hey, if the devs gonna implement it in xnview, i don't mind, but apparently they aren't too keen on doing it.


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