(fix): don't calculate statistics for masks

[ilan-gold]

Background

Something I noticed while playing around is that we were calculating stats for masks as well. So this PR should fix that. I am open to other options for this!

Change List

• Add isBitmask argument to initializeLayerChannels to stop stats calculation for masks

Checklist

• Ensure PR works with all demos on the dev.vitessce.io homepage
• Open (draft) PR's into vitessce-python and vitessce-r if this is a release PR
• Documentation added or updated

[ilan-gold]

Not sure of a better way to do this - maybe if-then instead of default and then an if statement to change? But the assignment operation is inexpensive. I think the first two defaults don't matter anyway, and the colors seems reasonable but not sure of the default palette for this.

[github-actions]

Size Change: +381 B (+0.01%)

Total Size: 6.43 MB

ℹ️ View Unchanged

Filename	Size	Change
./packages/main/prod/dist/blosc-********.js	612 kB	0 B
./packages/main/prod/dist/browser-********.js	16.2 kB	0 B
./packages/main/prod/dist/chunk-INHXZS53-********.js	558 B	0 B
./packages/main/prod/dist/deflate-********.js	244 B	0 B
./packages/main/prod/dist/gzip-********.js	693 B	0 B
./packages/main/prod/dist/hglib-********.js	4.33 MB	0 B
./packages/main/prod/dist/index-********.js	459 kB	+381 B (+0.08%)
./packages/main/prod/dist/index.min.js	927 B	0 B
./packages/main/prod/dist/jpeg-********.js	15.3 kB	0 B
./packages/main/prod/dist/lerc-********.js	47.2 kB	0 B
./packages/main/prod/dist/lz4-********.js	43.9 kB	0 B
./packages/main/prod/dist/lzw-********.js	2.11 kB	0 B
./packages/main/prod/dist/packbits-********.js	577 B	0 B
./packages/main/prod/dist/pako.esm-********.js	68.6 kB	0 B
./packages/main/prod/dist/raw-********.js	169 B	0 B
./packages/main/prod/dist/troika-three-text.esm-********.js	182 kB	0 B
./packages/main/prod/dist/webimage-********.js	837 B	0 B
./packages/main/prod/dist/zlib-********.js	695 B	0 B
./packages/main/prod/dist/zstd-********.js	643 kB	0 B

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[ilan-gold]

TODO: fix the opacity causing loads

edit: maybe this is not happening? can't reproduce now

[ilan-gold]

What's up with the size action also?

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	74.89%	10789 / 14405
🔵	Statements	74.89%	10789 / 14405
🔵	Functions	63.03%	295 / 468
🔵	Branches	79.53%	999 / 1256

File Coverage

File	Stmts	% Branch	% Funcs	% Lines	Uncovered Lines
Changed Files
packages/utils/spatial-utils/src/spatial.js	36.72%	71.42%	16.66%	36.72%	51-54, 57-68, 71-88, 96-110, 115-148, 150-214, 221-231, 240-259, 265-267, 276-315, 327-398, 400-404, 408-430, 433-440, 462-463, 469, 478-479, 485, 496-502, 526-530, 537-543

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