Since notcurses-view is now rendering to the standard plane, and
ncvisual is no longer bound to a plane, there's no need to call
ncplane_resize() (and doing so fails, since you can't resize the
standard plane). Remove the call, leave the check. Fixes resizing.
When we first begin operations, we need emit a cursor homing, which
we were not doing for the first line. As a result, the first row
didn't show up until you rendered something else, and even then
didn't show up unless you changed it (as it was otherwise undamaged).
This explains a lot of mystery behavior in notcurses-demo that I've
long told myself I'd hallucinated or imagined. Hurrah! but also
supershittytothemax! Thanks Marek Habersack for pointing out something
which led to an experiment which led to chasing this down once and
forever. Closes#619, w00t!
If we're in ASCII mode, no blitter except for NCBLIT_1x1 is going to
work. Whenever NCBLIT_DEFAULT is provided, select NCBLIT_1x1 if we're
in ASCII mode. Add NCVISUAL_OPTIONS_MAYDEGRADE and
NCPLOT_OPTIONS_MAYDEGRADE. Both serve to allow smooth degradation when a
blitter other than NCBLIT_DEFAULT has been provided. Closes#637.
Make calc_gradient_cell() static inline so our templated ncppplot
implementation can use it (ugh). When using NCBLIT_1x1 for plots in
ASCII mode, use space rather than full block, and invert colors.
Use NCBLIT_DEFAULT in the demo for the FPS plot.