This is a simple site that allows you to create your own RO Login Background. Although it is not yet 100% complete at the time of writing, it is fully functional and only lacks froggy aesthetic design.
With this tool, you can upload any image of your choice and select the desired area to be cropped. You can also adjust the aspect ratio to your liking.
The default output is a 24bit BMP, which produces very good quality images, you can choose to get the BMPs as 8Bit version if you check the checkbox, which will reduce the final output size (and quality too).
Tool URL: FroggoCutter (sapitosucio.github.io)
The files generated have the following format: t_¹è°æX-Y.bmp, said files are compressed into a .zip file, then it's downloaded.
Do remember those BMPs files should be placed on:
data\texture\À¯ÀúÀÎÅÍÆäÀ̽º
Btw everything is done locally, nothing is uploaded.
You can see it's source code here
Known Issues:
When you try to slice a big image (>3000px) and 8Bit is selected, the browser may lock itself for a few seconds (❁´◡`❁)
Froggo tip of the day: Use big images(>2000px), upscale them or something and then, slice it, the final result is quite gucci ?
Some SS: