Make Icon-O-Matic usable from command line so that it can convert icons from IOM to HVIF/SVG

[owenca]

Usage:

Icon-O-Matic -[h|s] -o output_file IOM_file

It returns 0 if successful or 1 otherwise.

[bbjimmy]

Might as well add -R for RDef and -S for HVIF Source Code

[mmu_man]

Hmm, I'd rather avoid using -h as it's traditionally used for help.

Also, you don't need to check for NULL before calling delete.

I don't see any reason to remove member init from the constructor, it's not like it creates any window.

[owenca]

Replying to jim saxton:

Might as well add -R for RDef and -S for HVIF Source Code

Done. (I wasn't sure if there was a special reason that the GCI task didn't ask for these two formats.)

[owenca]

Replying to François Revol:

Hmm, I'd rather avoid using -h as it's traditionally used for help.

Changed to -H. (I had the same concern, but after trying -h with mv/cp, I thought it was not the case anymore.)

Also, you don't need to check for NULL before calling delete.

Fixed. (I got it mixed up with double free in C.)

I don't see any reason to remove member init from the constructor, it's not like it creates any window.

The _Init() function creates two file panels and calls _RestoreSettings(). I wanted to bypass it for the command-line usage to make it run faster and to avoid any possible side effects unknown to me. If it's better to have the same constructor for both usage, I can put it back in.

[owenca]

Replacing the previous patch.

[owenca]

Replacing previous patches.

[owenca]

Added help/usage.

[pulkomandy]

Please submit patches to Gerrit instead of attaching them to the bugtracker.

[waddlesplash]

​https://review.haiku-os.org/c/haiku/+/60