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- * @Id: curs_color.3x,v 1.38 2015/05/23 21:36:35 tom Exp @
+ * @Id: curs_color.3x,v 1.46 2017/01/07 19:57:48 tom Exp @
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-</PRE>
-<H2><a name="h2-NAME">NAME</a></H2><PRE>
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>start_color</STRONG>, <STRONG>init_pair</STRONG>, <STRONG>init_color</STRONG>, <STRONG>has_colors</STRONG>,
- <STRONG>can_change_color</STRONG>, <STRONG>color_content</STRONG>, <STRONG>pair_content</STRONG>, <STRONG>COLOR_PAIR</STRONG>
- - <STRONG>curses</STRONG> color manipulation routines
+ <STRONG>can_change_color</STRONG>, <STRONG>color_content</STRONG>, <STRONG>pair_content</STRONG>, <STRONG>COLOR_PAIR</STRONG>,
+ <STRONG>PAIR_NUMBER</STRONG> - <STRONG>curses</STRONG> color manipulation routines
-</PRE>
-<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
- <STRONG>#</STRONG> <STRONG>include</STRONG> <STRONG><curses.h></STRONG>
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
+ <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>start_color(void);</STRONG>
<STRONG>int</STRONG> <STRONG>init_pair(short</STRONG> <STRONG>pair,</STRONG> <STRONG>short</STRONG> <STRONG>f,</STRONG> <STRONG>short</STRONG> <STRONG>b);</STRONG>
<STRONG>int</STRONG> <STRONG>init_color(short</STRONG> <STRONG>color,</STRONG> <STRONG>short</STRONG> <STRONG>r,</STRONG> <STRONG>short</STRONG> <STRONG>g,</STRONG> <STRONG>short</STRONG> <STRONG>b);</STRONG>
+
<STRONG>bool</STRONG> <STRONG>has_colors(void);</STRONG>
<STRONG>bool</STRONG> <STRONG>can_change_color(void);</STRONG>
+
<STRONG>int</STRONG> <STRONG>color_content(short</STRONG> <STRONG>color,</STRONG> <STRONG>short</STRONG> <STRONG>*r,</STRONG> <STRONG>short</STRONG> <STRONG>*g,</STRONG> <STRONG>short</STRONG>
<STRONG>*b);</STRONG>
<STRONG>int</STRONG> <STRONG>pair_content(short</STRONG> <STRONG>pair,</STRONG> <STRONG>short</STRONG> <STRONG>*f,</STRONG> <STRONG>short</STRONG> <STRONG>*b);</STRONG>
+ <STRONG>int</STRONG> <STRONG>COLOR_PAIR(int</STRONG> <STRONG>n);</STRONG>
+ <STRONG>PAIR_NUMBER(</STRONG><EM>attrs</EM><STRONG>);</STRONG>
-</PRE>
-<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
-</PRE>
-<H3><a name="h3-Overview">Overview</a></H3><PRE>
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+
+</PRE><H3><a name="h3-Overview">Overview</a></H3><PRE>
<STRONG>curses</STRONG> supports color attributes on terminals with that
capability. To use these routines <STRONG>start_color</STRONG> must be
called, usually right after <STRONG>initscr</STRONG>. Colors are always
background color (for the blank field on which the charac-
ters are displayed). A programmer initializes a color-
pair with the routine <STRONG>init_pair</STRONG>. After it has been ini-
- tialized, <STRONG>COLOR_PAIR</STRONG>(<EM>n</EM>), a macro defined in <STRONG><curses.h></STRONG>,
- can be used as a new video attribute.
+ tialized, <STRONG>COLOR_PAIR</STRONG>(<EM>n</EM>) can be used to convert the pair to
+ a video attribute.
If a terminal is capable of redefining colors, the pro-
grammer can use the routine <STRONG>init_color</STRONG> to change the defi-
how a given color-pair is currently defined.
-</PRE>
-<H3><a name="h3-Color-Rendering">Color Rendering</a></H3><PRE>
+</PRE><H3><a name="h3-Color-Rendering">Color Rendering</a></H3><PRE>
The <STRONG>curses</STRONG> library combines these inputs to produce the
actual foreground and background colors shown on the
screen:
<STRONG>o</STRONG> the background character (e.g., <STRONG>wbkgdset</STRONG>).
Per-character and window attributes are usually set by a
- parameter containing video attributes including a <STRONG>COL-</STRONG>
- <STRONG>OR_PAIR</STRONG> value. Some functions such as <STRONG>wattr_set</STRONG> use a
- separate parameter which is the color pair number.
+ parameter containing video attributes including a color
+ pair value. Some functions such as <STRONG>wattr_set</STRONG> use a sepa-
+ rate parameter which is the color pair number.
The background character is a special case: it includes a
character value, just as if it were passed to <STRONG>waddch</STRONG>.
background character.
-</PRE>
-<H3><a name="h3-Routine-Descriptions">Routine Descriptions</a></H3><PRE>
+</PRE><H3><a name="h3-Routine-Descriptions">Routine Descriptions</a></H3><PRE>
The <STRONG>start_color</STRONG> routine requires no arguments. It must be
called if the programmer wants to use colors, and before
any other color manipulation routine is called. It is
to by the second and third arguments are in the range <STRONG>0</STRONG>
through <STRONG>COLORS</STRONG>, inclusive.
+ <STRONG>PAIR_NUMBER(</STRONG><EM>attrs</EM>) extracts the color value from its <EM>attrs</EM>
+ parameter and returns it as a color pair number. Its in-
+ verse <STRONG>COLOR_PAIR(</STRONG><EM>n</EM><STRONG>)</STRONG> converts a color pair number to an at-
+ tribute. Attributes can hold color pairs in the range 0
+ to 255. If you need a color pair larger than that, you
+ must use functions such as <STRONG>attr_set</STRONG> (which pass the color
+ pair as a separate parameter) rather than the legacy func-
+ tions such as <STRONG>attrset</STRONG>.
-</PRE>
-<H3><a name="h3-Colors">Colors</a></H3><PRE>
+
+<
/PRE><H3><a name="h3-Colors">Colors</a></H3><PRE>
In <STRONG><curses.h></STRONG> the following macros are defined. These are
- the default colors. <STRONG>curses</STRONG> also assumes that <STRONG>COLOR_BLACK</STRONG>
- is the default background color for all terminals.
+ the standard colors (ISO-6429). <STRONG>curses</STRONG> also assumes that
+ <STRONG>COLOR_BLACK</STRONG> is the default background color for all termi-
+ nals.
<STRONG>COLOR_BLACK</STRONG>
<STRONG>COLOR_RED</STRONG>
<STRONG>COLOR_WHITE</STRONG>
-</PRE>
-<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- The routines <STRONG>can_change_color()</STRONG> and <STRONG>has_colors()</STRONG> return
- <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>.
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+ The routines <STRONG>can_change_color</STRONG> and <STRONG>has_colors</STRONG> return <STRONG>TRUE</STRONG>
+ or <STRONG>FALSE</STRONG>.
All other routines return the integer <STRONG>ERR</STRONG> upon failure and
an <STRONG>OK</STRONG> (SVr4 specifies only "an integer value other than
<STRONG>init_color</STRONG>
returns an error if the terminal does not support
- this feature, e.g., if the <EM>initialize</EM><STRONG>_</STRONG><EM>color</EM> capa-
+ this feature, e.g., if the <STRONG>initialize_color</STRONG> capa-
bility is absent from the terminal description.
<STRONG>start_color</STRONG>
located.
-</PRE>
-<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- In the <EM>ncurses</EM> implementation, there is a separate color
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ In the <STRONG>ncurses</STRONG> implementation, there is a separate color
activation flag, color palette, color pairs table, and as-
sociated COLORS and COLOR_PAIRS counts for each screen;
the <STRONG>start_color</STRONG> function only affects the current screen.
<STRONG>o</STRONG> Color RGB values are not settable.
-</PRE>
-<H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
This implementation satisfies XSI Curses's minimum maxi-
mums for <STRONG>COLORS</STRONG> and <STRONG>COLOR_PAIRS</STRONG>.
will treat those as optional parameters when null.
-</PRE>
-<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG>curs_vari-</STRONG>
<STRONG><A HREF="curs_variables.3x.html">ables(3x)</A></STRONG>, <STRONG><A HREF="default_colors.3x.html">default_colors(3x)</A></STRONG>
projects / ncurses.git / blobdiff