Java Swing HiDPI solution for icons - SVG and runtime scaling with Batik? Precompiled PNGs?

Question

I want to make the graphics (icons, logo etc.) of an existing Java Swing application look better on HiDPI displays with a scale factor larger than 1.0, e.g. my notebook with 14" display and Windows 10 (scale factor 1.5). At the moment, the application uses PNG images, with one resolution per image, e.g. 16x16 pixels for icons. On JButtons etc. these icons look horrible when they are scaled up by Java.

My current idea (A) to solve that problem (see [1] and [2] for credits):

Replace PNGs with SVGs.
Include Apache Batik in the Swing desktop application (~ 4 megabytes of new JAR dependencies just for that, ughh).
Use Batik to rasterize the SVGs at runtime to multiple BufferedImages, one for each scale factor (1.0, 1.25, 1.5, ...) to be supported.
Put the BufferedImages (e.g. 16x16, 20x20, 24x24, ...) into a standard BaseMultiResolutionImage.

A slightly different idea (B) might be:

and 4.: Instead: Extend AbstractMultiResolutionImage and overwrite getResolutionVariant to rasterize just the requested destImageWidth/destImageHeight pixel size using Batik (and cache the result with width/height as cache key). This way, any requested destImageWidth/destImageHeight could be provided exactly. This might be useful, as there seem to be some rounding effects causing dest width or height to differ by 1 or 2 pixels from what I'd expect.

Both approaches above require Batik (and its transitive dependencies) as a runtime dependency / to be included in my client distribution. And I'm like: Do I really want that just because of some simple icons?! (= just eye candy)

Therefore, idea C: On my dev system, I might use rsvg-convert or Inkscape to "precompile" different resolution PNGs from a source SVG (e.g. 16x16, 20x20, 24x24, ...). Then I include the PNGs (not the source SVG) in my application and build a BaseMultiResolutionImage just from the precompiled PNGs. This approach offers the huge advantage of not needing Batik. But it's more manual work and not as flexible.

Question: Is there maybe a best practice approach or a pure Java solution (maybe in Java 17..20...?) for this as supporting HiDPI seems to be a very common thing? Or what is your solution for this problem?

Maybe something more like [this](https://stackoverflow.com/questions/56618089/java-swing-hidpi-scaling) — MadProgrammer, Jul 17 '23 at 08:56
For my applications, I use fonts for icons (like Font Awesome). I have my own library that will create a multi resolution image based on the font name and character. — Anthony, Jul 17 '23 at 12:27
@Anthony Hey, that's a nice idea! I'll try that! :) Thank you! — MrSnrub, Jul 17 '23 at 19:12
@MrSnrub you can start by looking at https://jiconfont.github.io/ — Anthony, Jul 18 '23 at 20:09

Java Swing HiDPI solution for icons - SVG and runtime scaling with Batik? Precompiled PNGs?

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