* Use the Bold(1) SGR parameter in only one case -- White-on-Black.
* Use the 0x9X and 0x10X SGR parameters to set intense/bright colors for
both foreground and background.
Detailed changes:
* DkGray background:
- Previously, this background was handled identically to the Black
background.
- Now it is treated like the non-grayscale colors, and the
foreground/background are set exactly.
* Black background:
- LtGray foreground is unchanged: default text colors
- White foreground is unchanged: text is bolded
- DkGray is fixed: instead of concealing the text, set the foreground
to DkGray, falling back to LtGray.
* LtGray background:
- Previously, this background was handled exactly the same way as the
White background.
- Now it is treated like any other non-grayscale color.
* White background:
- Black foreground is unchanged: only an Invert is output.
- LtGray: previously, the text was concealed. Now it is handled like
Black, and only an Invert is output.
- DkGray: previously only Invert was output. Now DkGray is also
output.
- White is effectively unchanged; it is still concealed if possible.
Also: set the console colors to LtGray-on-Black on startup. The
heuristic makes little sense with other colors.
Fixes https://github.com/rprichard/winpty/issues/39
a998bcf207