Implement invisible mode by setting the foreground color to be the same
as the background color. Not rendering anything would also be an
alternative, but this seems less likely to cause surprises in
conjunction with any hacks.
Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Faint, invisible, struck and fast blink are added as glyph attributes.
Since there's an edit here, let's take the opportunity to reorder them
so that they correspond to the two's power of the corresponding escape
code. (just for neatness, let's hope that property never gets used for
anything.)
Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
Anders EureniusandRoberto E. Vargas Caballero