43 lines
2.0 KiB
Plaintext
43 lines
2.0 KiB
Plaintext
This copy of the nethack source includes a patch to allow black objects
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(orcish daggers, ravens, pits, etc.) to be represented using a dark shade
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of gray on some terminals. Normally, nethack shows them as blue to avoid
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printing unreadable black-on-black text, but this confuses them with with
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objects that are actually blue (cornuthaums, sapphires, soldier ants,
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etc.).
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The patch works by specifying "black foreground" and "boldface" at the
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same time. On terminals that simulate bold with brighter colors, this
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produces a distinct color. Terminal emulators based on PC CGA/EGA/VGA
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textmode generally have this property.
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However, on terminals that implement actual bolding -- thickening the
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font without changing the color, it will result in invisible text. So,
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the feature is not enabled by default. It must be activated with the new
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option "use_darkgray".
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Notes:
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* This patch is only effective in when TERMINFO is defined in unixconf.h
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* Highlights added by the existing "use_inverse" and/or "hilite_pet"
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options will probably not be visible when applied to black objects.
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* nethack doesn't properly follow the rules for using the tputs()
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function of termcap/curses. The first argument is supposed to be a string
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obtained from the termcap/terminfo functions. Nethack assumes it can
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provide a null pointer to do nothing, and can string-concatenate two codes
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(boldface and a color select) and use them as one.
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My code does not fix this -- although it uses "" instead of a null
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pointer, which is less likely to crash on a less permissive
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termcap/terminfo implementation.
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* I'm aware of a seperate patch to add darkgray support -- but it was
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unconditional at runtime, and had to change the color numbers in
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includes/color.h to work. My patch makes the TTY code independent of the
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actual value of the CLR_* defines.
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* I personally believe the correct spelling of the color involved is
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"grey", however I have adopted the popular misspelling "gray" throughout
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to be consistent with the rest of nethack. :)
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---- Michael Deutschmann <michael@talamasca.ocis.net>
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