svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
can_change_color(3xcurses)
can_c...color(3XCURSES) X/Open Curses Library Functionscan_c...color(3XCURSES)
NAME
can_change_color, color_content, COLOR_PAIR, has_colors, init_color,
init_pair, pair_content, PAIR_NUMBER, start_color, COLOR_PAIRS, COLORS
- manipulate color information
SYNOPSIS
cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib \
-R /usr/xpg4/lib -lcurses [ library... ]
c89 [ flag... ] file... -lcurses [ library... ]
#include <curses.h>
bool can_change_color(void);
int color_content(short color, short *red, short *green, short *blue);
int COLOR_PAIR(int n);
bool has_colors(void);
int init_color(short color, short red, short green, short blue);
int init_pair(short pair, short f, short b);
int pair_content(short pair, short *f, short *b);
int PAIR_NUMBER(int value);
int start_color(voidextern int COLOR_PAIRS;
extern int COLORS;
DESCRIPTION
These functions manipulate color on terminals that support color.
Querying Capabilities
The has_colors() function indicates whether the terminal is a color
terminal. The can_change_color() function indicates whether the termi‐
nal is a color terminal on which colors can be redefined.
Initialization
The start_color() function must be called to enable use of colors and
before any color manipulation function is called. The function initial‐
izes eight basic colors (black, red, green, yellow, blue, magenta,
cyan, and white) that can be specified by the color macros (such as
COLOR_BLACK) defined in <curses.h>. The initial appearance of these
colors is unspecified.
The function also initializes two global external variables:
o COLORS defines the number of colors that the terminal sup‐
ports. See Color Identification below. If COLORS is 0, the
terminal does not support redefinition of colors and
can_change_color() will return FALSE.
o COLOR_PAIRS defines the maximum number of color-pairs that
the terminal supports. See User-defined Color Pairs below.
The start_color() function also restores the colors on the terminal to
terminal-specific initial values. The initial background color is as‐
sumed to be black for all terminals.
Color Identification
The init_color() function redefines color number color, on terminals
that support the redefinition of colors, to have the red, green, and
blue intensity components specified by red, green, and blue, respec‐
tively. Calling init_color() also changes all occurrences of the speci‐
fied color on the screen to the new definition.
The color_content() function identifies the intensity components of
color number color. It stores the red, green, and blue intensity compo‐
nents of this color in the addresses pointed to by red, green, and
blue, respectively.
For both functions, the color argument must be in the range from 0 to
and including COLORS−1. Valid intensity value range from 0 (no inten‐
sity component) up to and including 1000 (maximum intensity in that
component).
User-defined Color Pairs
Calling init_pair() defines or redefines color-pair number pair to have
foreground color f and background color b. Calling init_pair() changes
any characters that were displayed in the color pair's old definition
to the new definition and refreshes the screen.
After defining the color pair, the macro COLOR_PAIR(n) returns the
value of color pair n. This value is the color attribute as it would be
extracted from a chtype. Controversy, the macro COLOR_NUMBER(value) re‐
turns the color pair number associated with the color attribute value.
The pair_content() retrieves the component colors of a color-pair num‐
ber pair. It stores the foreground and background color numbers in the
variables pointed to by f and b, respectively.
With init_pair() and pair_content(), the value of pair must be in a
range from 0 to and including COLOR_PAIRS−1. Valid values for f and b
are the range from 0 to and including COLORS−1.
PARAMETERS
color Is the number of the color for which to provide information (0
to COLORS−1).
red Is a pointer to the RGB value for the amount of red in color.
green Is a pointer to the RGB value for the amount of green in
color.
blue Is a pointer to the RGB value for the amount of blue in color.
n Is the number of a color pair.
pair Is the number of the color pair for which to provide informa‐
tion (1 to COLOR_PAIRS−1).
f Is a pointer to the number of the foreground color (0 to COL‐
ORS−1) in pair.
b Is a pointer to the number of the background color (0 to COL‐
ORS−1) in pair.
value Is a color attribute value.
RETURN VALUES
The has_colors() function returns TRUE if the terminal can manipulate
colors. Otherwise, it returns FALSE.
The can_change_color() function returns TRUE if the terminal supports
colors and is able to change their definitions. Otherwise, it returns
FALSE.
Upon successful completion, the other functions return OK. Otherwise,
they return ERR.
ERRORS
No errors are defined.
USAGE
To use these functions, start_color() must be called, usually right af‐
ter initscr(3XCURSES).
The can_change_color() and has_colors() functions facilitate writing
terminal-independent applications. For example, a programmer can use
them to decide whether to use color or some other video attribute.
On color terminals, a typical value of COLORS is 8 and the macros such
as COLOR_BLACK return a value within the range from 0 to and including
7. However, applications cannot rely on this to be true.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ MT-LevelUnsafe _ Stan‐
dardSee standards(7).
SEE ALSO
attroff(3XCURSES), delscreen(3XCURSES), initscr(3XCURSES),
libcurses(3XCURSES), attributes(7), standards(7)
Oracle Solaris 11.4 5 Jun 2002 can_c...color(3XCURSES)