In the quest (hopefully not futile) to use a single vblank interrupt source across most #casioloopy emus (can't right now), I wrote a test ROM for it.
Not sure emu maintainers, who have their own things to do, will use it. I've done some emu work but am not good at it.
github.com/bbbbbr/loopy...
![Linux console output with text:
$ png2reducedrgb -h
png2reducedrgb: RGB bit depth reducer (by bbbbbr)
Version: 1.0.0
usage: tilepalquant <file>.png [options]
-o <filename> Ouput file (if not used then default is <png file>_out.png)
-h Show this help output
-v Verbose output (-vv for extra debug output)
-bit_depth <r,g,b> Bits per RGB channel output (1-8 per channel, default: 5,5,5)
Example: "-bit_depth_out 5,5,5"
-output_order_bgr Write BGR order for raw binary output (default: RGB)
-output_little_endian Write little endian (low bytes first) for raw binary output (default: big)
-output_png Output a PNG file instead of raw binary data
-output_c Output a C source file and header instead of raw binary data
-use_metafile Read extra options from file <inputfile>.meta (missing not an error)
Example usage: tilepalquant in.png -bit_depth_out 5,5,5 -o rgb_out.bin
$ png2reducedrgb rgb888_range_test.png -o rgb555_range_test.bin -v -bit_depth 5,5,5
truncating to: 5,5,5
PNG Loaded: rgb888_range_test.png: Image size 256 x 224
$](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:rr3xojzui6zekxdjossws7hu/bafkreibybdtry5ehtngg2k3ygmvluiqnpmc4gc5lokmzhzjcklfs5hxmc4)
