#374 blargg NTSC filter patch

[Fredrick Meunier]

matja on WoS has posted a patch to add support for the blargg NTSC filter to Fuse.

Hi specchums, I've created a patch for Fuse 1.2.1 which adds a scaler which simulates shimmering/composite/RF artifacts like a real speccy outputting to a TV.

This started as a little experiment about a week ago, but ended up working pretty much how I wanted it to, so I'll put the code here so anyone can play with it.

I used Blargg's excellent snes_ntsc library ( http://slack.net/~ant/libs/ntsc.html ), which despite its name, gives rather similar artifacts to a speccy with PAL composite output.

I've only implemented the GTK UI code, and only tested it on a couple of Linux machines with GTK, so portability would seem to be rather limited, but the scaler itself should work on anything with a 24-bit display.

Download the patch here

How to compile :

tar xf fuse-1.2.1.tar.gz
cd fuse-1.2.1
patch -p1 < fuse-1.2.1.blargg-snes-ntsc.patch 
autoreconf --force --install
automake
./configure --prefix=<where-your-libspectrum-is-installed>
make install

Enough words, time for pics:

Mega-Text demo, Your Sinclair issue 21 with Blargg NTSC 3x filter:

compared to standard PAL TV 3x filter:

Animated dot-crawl :

Manic miner close-up :

Artifacts/fringing shimmer :

Filter options :

[Fredrick Meunier]

I've pushed this to [c17d3a1] on the patches-374-blargg-ntsc-filter-patch branch.

I think it needs some more polishing but it looks like a fun addition to Fuse.