VTERM_ATTR_BACKGROUND
VTermColor *colp = (attr == VTERM_ATTR_BACKGROUND) ? &state->pen.bg : &state->pen.fg;
state->pen.bg = state->default_bg; setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->default_bg);
setpenattr_col( state, VTERM_ATTR_BACKGROUND, state->pen.bg);
set_pen_col_ansi(state, VTERM_ATTR_BACKGROUND, value);
setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->pen.bg);
setpenattr_col(state, VTERM_ATTR_BACKGROUND, state->pen.bg);
set_pen_col_ansi(state, VTERM_ATTR_BACKGROUND, value);
case VTERM_ATTR_BACKGROUND:
case VTERM_ATTR_BACKGROUND:
case VTERM_ATTR_BACKGROUND: return VTERM_VALUETYPE_COLOR;