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authorKartik K. Agaram <vc@akkartik.com>2021-04-19 21:05:57 -0700
committerKartik K. Agaram <vc@akkartik.com>2021-04-19 21:05:57 -0700
commit34596b6ee9811a3f1a5bf94d307f6527cb7467b1 (patch)
treef443bd426bce78e677f0b4879cec0775156e6b1c /linux/ex1.subx
parentc22874a97f9e22f00b78b46b0647ea97325370f4 (diff)
downloadmu-34596b6ee9811a3f1a5bf94d307f6527cb7467b1.tar.gz
reimplement pixel graphics
Before: we always drew pixels atop characters, and we only drew pixels
that were explicitly requested.

After: we always draw pixels atop characters, and we only draw pixels that
don't have color 0.

Both semantics should be identical as long as pixels are never drawn atop
characters.
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