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Originally it seemed sensible to make these units of bytes, for
flexibility reasons.
But it's advantageous for everything to be able to assume pixels
are always 4-byte/32-bit aligned. Having the stride/pitch be in
bytes of units made it theoretically possible to produce
unaligned rows of pixels, which would break that assumption.
I don't think anything was ever actually producing such things,
and I've added some asserts to the {sdl,drm}_fb.c page
acquisition code to go fatal on such pages.
This change required going through all the modules and get rid of
their uint32_t vs. void* dances and other such 1-byte vs. 4-byte
scaling arithmetic.
Code is simpler now, and probably faster in some cases. And now
allows future work to just assume things cna always occur 4-bytes
at a time without concern for unaligned accesses.
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Mechanical renaming of "zero" to "clear" throughout for this
context.
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Oversight from when zeroed tracking was introduced in d9db26.
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This was removed before, despite being left in the header by mistake.
Putting back for glimmer's sake.
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Largely mechanical rename of librototiller -> libtil, but
introducing a til_ prefix to all librototiller (now libtil)
functions and types where a rototiller prefix was absent.
This is just a step towards a more libized librototiller, and til
is just a nicer to type/read prefix than rototiller_.
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