Improve wad texture handling

[DrLex0]

Fix for issue #37, and actually also #2 (if the user maps their input images to the Quake palette and ensures none of the pixels have fullbright colors if undesired).

For the wad tool:

• Option -r to skip RGB conversion for images that already are indexed color (obviously they must use the Quake palette). Especially useful to avoid that pixels unexpectedly become fullbright.
• Option -s to use smooth resizing when generating mipmaps.
• Option -S to use optimal scaling depending on presence of fullbright pixels or not.

Default behavior remains the same, but in most cases it will be recommended to run wad with -rS arguments.

[jonathanlinat]

@joshuaskelly Any chance to merge this?

[hemebond]

Can the parameters be given full names too? e.g., --no-convert, --smooth-resize, or something?

[DrLex0]

Can the parameters be given full names too? e.g., --no-convert, --smooth-resize, or something?

• -r = --raw-indexed
• -s = --smooth-mip
• -S = --smart-mip

[jonathanlinat]

Can the parameters be given full names too? e.g., --no-convert, --smooth-resize, or something?

* `-r` = `--raw-indexed`
* `-s` = `--smooth-mip`
* `-S` = `--smart-mip`

That’s exactly @hemebond's point. Having both -s and -S might be confusing. How about adding the full names as well for clarity?

[DrLex0]

@jonathanlinat They have been added, these are the new long parameter names that correspond to the short ones (I have also added long parameters for type and quiet).

[jonathanlinat]

You are right. I didn't see the commit. Nice addition @DrLex0 🙏🏻