weight of diffs that persist across multiple frames.
For each frame, zero out update priority of bytes that no longer have
a pending diff, and add the edit distance of the remaining diffs.
Zero these out as opcodes are retired.
Replace hamming distance with Damerau-Levenshtein distance of the
encoded pixel colours in the byte, e.g. 0x2A --> GGG0 (taking into
account the half-pixel)
This has a couple of benefits over hamming distance of the bit patterns:
- transposed pixels are weighted less (edit distance 1, not 2+ for
Hamming)
- coloured pixels are weighted equally as white pixels (not half as
much)
- weighting changes in palette bit that flip multiple pixel colours
While I'm here, the RLE opcode should emit run_length - 1 so that we
can encode runs of 256 bytes.
don't consistently prefer larger numbers.
There still seems to be a bug somewhere causing some screen regions to
be consistently not updated, but perhaps I'll find it when working on
the logic to penalize persistent diffs.
of pages and content, since we may never get around to some of them
across many frames. Instead weight by total xor weight for the page,
(page, content) tuple and offset list
Add some other scheduler variants
- prefer content first, then page. This turns out to introduce a lot
of colour fringing since we may not ever get back to fix up the
hanging bit
