Support higher pixel densities

[dfabulich]

Apropos https://gitlab.com/DavidGriffith/frotz/-/issues/222

SDL Frotz doesn't yet support higher pixel densities, but hopefully some day it will, and, when it does, Infocom Frotz should do the same.

[dfabulich]

In https://gitlab.com/DavidGriffith/frotz/-/issues/222 I figured out a workaround: Frotz accepts a settings file that sets the font size, width/height, and an "Infocom V6 Scaling" factor for images.

Unfortunately, the only way to set a font size is to provide your own TTF files and create a settings file referring to them. Then you can use the command-line -C parameter to load the config file, and then Frotz will load the TTF files.

I tried searching the code of this repository, and, I'll be honest, I have no idea how it works! I can see how I could pass TTF files and a settings file into preamble.mjs, but I can't see how frotz itself gets launched, or where I'd add command-line arguments.

If you can give me a hint as to how to pass a command-line argument, I'd be willing to try filing a PR to pass frotz a scaling factor.

[curiousdannii]

The CLI arguments is just the Module.arguments at the top of preamble.js. Frotz launches itself when the file is loaded.

Don't know if you noticed, but I had to add quite a few hacks to get better pixel densities on mobile, which are in the replaced functions in frotz-library.js. It will probably be hard to get further high-pixel stuff working, unless we just make it do a flat 2x or 3x for all browsers.