Higher color depth

[ADormant]

Option for higher color depth would be nice since NES has a very limited number of colors. Something like this:

https://github.com/simias/rustation-libretro/commit/3db9e1bbf65baf75166139d136789d18bf65dbfe https://github.com/simias/rustation-libretro/commit/595ba82463d200b208d4d6be27c446cfe3c179d5 https://github.com/simias/rustation-libretro/commit/518f17ce6c0ce7847db75f7d8f5840d89137c033 https://github.com/simias/rustation/commit/b3e7626c5ce52c1587ff511bf74013ba4fa88558 https://github.com/libretro/beetle-psx-libretro/commit/5ed95bbdf2d7c349476de6d01356124c2e9edeb7 https://github.com/simias/rustation-libretro/commit/9178efe4bfa50777f5b5f253ada9af4fe7cc02e8 https://github.com/libretro/beetle-psx-libretro/pull/29/files https://sourceforge.net/p/desmume/code/5395/

[ADormant]

@punesemu Check GBE+ in particular. Real GBA could only use 15 bit RGB color palette but GBE+ can use 24bit( 24bit or 24bit+8 bit alpha I'm not sure) true color to make colors much more vivid even without replacement tiles. Tomorrow GBE+ should have a campiled stable release. https://github.com/visualboyadvance-m/visualboyadvance-m https://github.com/shonumi/gbe-plus https://github.com/libretro/gambatte-libretro