Rendering Improvements

[numa-smells]

Hello! I've been using the original project recently (ver. 1.5.2) and stumbled upon this one. This is my first time coding for a DS project so hopefully everything isn't too poorly written haha.

I wanted to try improving text rendering, namely:

• fix bitmap to use pitch rather than width for y offset.
• pen position now use the full 24.6 bit representation for more accuracy.
• use kerning.
• use LCD subpixel rendering for BGR displays. (still need to test on my DS lite if it actually helps)

These changes were tested on my 2DS XL running through TWiLight Menu++ and works with no issues

[numa-smells]

just found out the DS lcd pattern is horizontally oriented while it seems to be vertically oriented on the 3ds...

edit:
testing it now with the vertical LCD subpixel rendering and it does help visually. Here it is on the demo booklet. The serif on the R appears a lot lighter.

I'm using light hinting as well.
For some reason it does freeze up on my DS but not on the 3DS randomly at some point when I turn the page. Oh well ultimately ill be reading more on the 3DS since its a bigger screen, but I'll update my code in this merge request with the DS in mind