If notcurses_init() fails due to a bad encoding, it's
probably because someone didn't call setlocale(3).
Make a suggestion in the error message. Resolves#414.
ncplane_mergedown() is similar to the "Merge down" operation
in the GIMP. It writes to the destination plane the result
of rendering the source and destination frames per se.
I noticed while running benchmarks against ranges of widths that
we failed on certain widths. I traced this down to a repeatable
failure when run with the -c flag at the 104x52 resolution. At this
geometry and PRNG seed, we NULLed out the first subwindow of fallin',
but didn't recompress the window array. On the next loop we thus used
it again, and segfaulted out. This fixes that up. We now pass 100% of
the benchmarks, whereas we were failing about 3% before #407.
Add four new fields to notcurses_options: margin_{tblr}, which requests margins to the top, right, bottom, and left. Render only within those margins, leaving the screen otherwise untouched (well, cleared if using the alternate screen). #293
Introduce limited plane rotation capability. We currently support clockwise and counterclockwise rotation of planes. Square and rectangular geometries are both supported, but there must be an even number of columns. The atomic unit of rotation is a 2x1 "square" (this assumes .5 cell aspect ratio). We can only rotate those glyphs which have rotated equivalents, and not even all of those. We currently handle only:
* null glyph
* space
* upper half block
* lower half block
* full block
I've added unit tests as well. This functionality is used by our Tetris example in the book
ncplane_mouseevent_p() is retired--it was poorly named, and
ncplane_translate_abs() does what it does, plus more, plus
more generally (it works on any y, x, not necessarily an
ncinput). update c++ wrappers #394.
