43d5eb454b
term.h #defines lines, pad_char and no_color_video macros which conflict with existing curses code. We change lines to alines and nlines depending on use, pad_char to padchar and no_color_video becomes no_color_attributes but with a strong alias from no_color_video.
233 lines
6.2 KiB
Groff
233 lines
6.2 KiB
Groff
.\" $NetBSD: curses_color.3,v 1.12 2009/07/22 16:57:14 roy Exp $
|
|
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Julian Coleman.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd July 20, 2009
|
|
.Dt CURSES_COLOR 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm curses_color ,
|
|
.Nm has_colors ,
|
|
.Nm can_change_color ,
|
|
.Nm start_color ,
|
|
.Nm init_pair ,
|
|
.Nm pair_content ,
|
|
.Nm COLOR_PAIR ,
|
|
.Nm PAIR_NUMBER ,
|
|
.Nm init_color ,
|
|
.Nm color_content ,
|
|
.Nm no_color_attributes
|
|
.Nd curses color manipulation routines
|
|
.Sh LIBRARY
|
|
.Lb libcurses
|
|
.Sh SYNOPSIS
|
|
.In curses.h
|
|
.Ft bool
|
|
.Fn has_colors void
|
|
.Ft bool
|
|
.Fn can_change_color void
|
|
.Ft int
|
|
.Fn start_color void
|
|
.Ft int
|
|
.Fn init_pair "short pair" "short fore" "short back"
|
|
.Ft int
|
|
.Fn pair_content "short pair" "short *fore" "short *back"
|
|
.Ft int
|
|
.Fn COLOR_PAIR "int n"
|
|
.Ft int
|
|
.Fn PAIR_NUMBER "int val"
|
|
.Ft int
|
|
.Fn init_color "short color" "short red" "short green" "short blue"
|
|
.Ft int
|
|
.Fn color_content "short color" "short *red" "short *green" "short *blue"
|
|
.Ft attr_t
|
|
.Fn no_color_attributes void
|
|
.Pp
|
|
.Va extern int COLOR_PAIRS ;
|
|
.Pp
|
|
.Va extern int COLORS ;
|
|
.Sh DESCRIPTION
|
|
These functions manipulate color on terminals that support color attributes.
|
|
.Pp
|
|
The function
|
|
.Fn has_colors
|
|
indicates whether a terminal is capable of displaying color attributes.
|
|
It returns
|
|
.Dv TRUE
|
|
if the terminal is capable of displaying color attributes and
|
|
.Dv FALSE
|
|
otherwise.
|
|
.Pp
|
|
The function
|
|
.Fn can_change_color
|
|
indicates whether a terminal is capable of redefining colors.
|
|
It returns
|
|
.Dv TRUE
|
|
if colors can be redefined and
|
|
.Dv FALSE
|
|
if they can not.
|
|
.Pp
|
|
The function
|
|
.Fn start_color
|
|
initializes the curses color support on a terminal.
|
|
It must be called before any color manipulation functions are called on that
|
|
terminal.
|
|
The function initializes the eight basic colors (black, red, green, yellow,
|
|
blue, magenta, cyan and white) that are specified using the color macros
|
|
(such as
|
|
.Dv COLOR_BLACK )
|
|
defined in
|
|
.Em \*[Lt]curses.h\*[Gt] .
|
|
.Fn start_color
|
|
also initializes the global external variables
|
|
.Va COLORS
|
|
and
|
|
.Va COLOR_PAIRS .
|
|
.Va COLORS
|
|
defines the number of colors that the terminal supports and
|
|
.Va COLOR_PAIRS
|
|
defines the number of color-pairs that the terminal supports.
|
|
These color-pairs are initialized to white foreground on black background.
|
|
.Fn start_color
|
|
sets the colors on the terminal to the curses defaults of white
|
|
foreground on black background unless the functions
|
|
.Fn assume_default_colors
|
|
or
|
|
.Fn use_default_colors
|
|
have been called previously.
|
|
.Pp
|
|
The function
|
|
.Fn init_pair pair fore back
|
|
sets foreground color
|
|
.Fa fore
|
|
and background color
|
|
.Fa back
|
|
for color-pair number
|
|
.Fa pair .
|
|
The valid range for the color-pair
|
|
.Fa pair
|
|
is from 1 to
|
|
.Va COLOR_PAIRS
|
|
\&- 1
|
|
and the valid range for the colors is any number less than
|
|
.Va COLORS .
|
|
Specifying a negative number will set that color to the default foreground
|
|
or background color.
|
|
The 8 initial colors are defined as:
|
|
.Bl -tag -width "COLOR_MAGENTA" -compact -offset indent
|
|
.It COLOR_BLACK
|
|
.It COLOR_RED
|
|
.It COLOR_GREEN
|
|
.It COLOR_YELLOW
|
|
.It COLOR_BLUE
|
|
.It COLOR_MAGENTA
|
|
.It COLOR_CYAN
|
|
.It COLOR_WHITE
|
|
.El
|
|
Color-pair 0 is used as the default color pair, so changing this will
|
|
have no effect.
|
|
Use the function
|
|
.Fn assume_default_colors
|
|
to change the default colors.
|
|
.Pp
|
|
The function
|
|
.Fn pair_content pair *fore *back
|
|
stores the foreground and background color numbers of color-pair
|
|
.Fa pair
|
|
in the variables
|
|
.Fa fore
|
|
and
|
|
.Fa back ,
|
|
respectively.
|
|
.Pp
|
|
The macro
|
|
.Fn COLOR_PAIR n
|
|
gives the attribute value of color-pair number
|
|
.Fa n .
|
|
This is the value that is used to set the attribute of a character to this
|
|
color-pair.
|
|
For example,
|
|
.Dl attrset(COLOR_PAIR(2))
|
|
will display characters using color-pair 2.
|
|
.Pp
|
|
The macro
|
|
.Fn PAIR_NUMBER val
|
|
gives the color-pair number associated with the attribute value
|
|
.Fa val .
|
|
.Pp
|
|
The function
|
|
.Fn init_color color red green blue
|
|
sets the red, green and blue intensity components of color
|
|
.Fa color
|
|
to the values
|
|
.Fa red ,
|
|
.Fa green
|
|
and
|
|
.Fa blue ,
|
|
respectively.
|
|
The minimum intensity value is 0 and the maximum intensity value is 1000.
|
|
.Pp
|
|
The function
|
|
.Fn color_content color *red *green *blue
|
|
stores the red, green and blue intensity components of color
|
|
.Fa color
|
|
in the variables
|
|
.Fa red ,
|
|
.Fa green ,
|
|
and
|
|
.Fa blue ,
|
|
respectively.
|
|
.Pp
|
|
The function
|
|
.Fn no_color_attributes
|
|
returns those attributes that a terminal is unable to combine with color.
|
|
.Sh RETURN VALUES
|
|
The functions
|
|
.Fn start_color ,
|
|
.Fn init_pair ,
|
|
.Fn pair_content ,
|
|
.Fn init_color
|
|
and
|
|
.Fn color_content
|
|
return OK on success and ERR on failure.
|
|
.Sh SEE ALSO
|
|
.Xr curses_attributes 3 ,
|
|
.Xr curses_background 3 ,
|
|
.Xr curses_default_colors 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Nx
|
|
Curses library complies with the X/Open Curses specification, part of the
|
|
Single Unix Specification.
|
|
.Pp
|
|
The function
|
|
.Fn no_color_attributes
|
|
and the use of negative color numbers
|
|
are extensions to the X/Open Curses specification.
|
|
.Sh HISTORY
|
|
These functions first appeared in
|
|
.Nx 1.5 .
|