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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>start_color</STRONG>, <STRONG>has_colors</STRONG>, <STRONG>can_change_color</STRONG>, <STRONG>init_pair</STRONG>, <STRONG>init_color</STRONG>,
- <STRONG>color_content</STRONG>, <STRONG>pair_content</STRONG>, <STRONG>COLOR_PAIR</STRONG>, <STRONG>PAIR_NUMBER</STRONG> - <STRONG>curses</STRONG> color
- manipulation routines
+ <STRONG>color_content</STRONG>, <STRONG>pair_content</STRONG>, <STRONG>reset_color_pairs</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>int</STRONG> <STRONG>extended_color_content(int</STRONG> <STRONG>color,</STRONG> <STRONG>int</STRONG> <STRONG>*r,</STRONG> <STRONG>int</STRONG> <STRONG>*g,</STRONG> <STRONG>int</STRONG> <STRONG>*b);</STRONG>
<STRONG>int</STRONG> <STRONG>extended_pair_content(int</STRONG> <STRONG>pair,</STRONG> <STRONG>int</STRONG> <STRONG>*f,</STRONG> <STRONG>int</STRONG> <STRONG>*b);</STRONG>
+ /* extensions */
+ <STRONG>void</STRONG> <STRONG>reset_color_pairs(void);</STRONG>
+
<STRONG>int</STRONG> <STRONG>COLOR_PAIR(int</STRONG> <STRONG>n);</STRONG>
<STRONG>PAIR_NUMBER(</STRONG><EM>attrs</EM><STRONG>);</STRONG>
ors (color number <STRONG>-1</STRONG>) if you first invoke the <STRONG><A HREF="default_colors.3x.html">use_default_colors(3x)</A></STRONG>
routine.
+ The extension <STRONG>reset_color_pairs</STRONG> tells ncurses to discard all of the
+ color-pair information which was set with <STRONG>init_pair</STRONG>. It also touches
+ the current- and standard-screens, allowing an application to switch
+ color palettes rapidly.
+
</PRE><H3><a name="h3-init_color">init_color</a></H3><PRE>
- The <STRONG>init_color</STRONG> routine changes the definition of a color. It takes
+ The <STRONG>init_color</STRONG> routine changes the definition of a color. It takes
four arguments: the number of the color to be changed followed by three
RGB values (for the amounts of red, green, and blue components).
- <STRONG>o</STRONG> The first argument must be a legal color value; default colors are
- not allowed here. (See the section <STRONG>Colors</STRONG> for the default color
+ <STRONG>o</STRONG> The first argument must be a legal color value; default colors are
+ not allowed here. (See the section <STRONG>Colors</STRONG> for the default color
index.)
- <STRONG>o</STRONG> Each of the last three arguments must be a value in the range <STRONG>0</STRONG>
+ <STRONG>o</STRONG> Each of the last three arguments must be a value in the range <STRONG>0</STRONG>
through <STRONG>1000</STRONG>.
- When <STRONG>init_color</STRONG> is used, all occurrences of that color on the screen
+ When <STRONG>init_color</STRONG> is used, all occurrences of that color on the screen
immediately change to the new definition.
</PRE><H3><a name="h3-color_content">color_content</a></H3><PRE>
The <STRONG>color_content</STRONG> routine gives programmers a way to find the intensity
- of the red, green, and blue (RGB) components in a color. It requires
- four arguments: the color number, and three addresses of <STRONG>short</STRONG>s for
- storing the information about the amounts of red, green, and blue com-
+ of the red, green, and blue (RGB) components in a color. It requires
+ four arguments: the color number, and three addresses of <STRONG>short</STRONG>s for
+ storing the information about the amounts of red, green, and blue com-
ponents in the given color.
- <STRONG>o</STRONG> The first argument must be a legal color value, i.e., <STRONG>0</STRONG> through
+ <STRONG>o</STRONG> The first argument must be a legal color value, i.e., <STRONG>0</STRONG> through
<STRONG>COLORS-1</STRONG>, inclusive.
- <STRONG>o</STRONG> The values that are stored at the addresses pointed to by the last
- three arguments are in the range <STRONG>0</STRONG> (no component) through <STRONG>1000</STRONG>
+ <STRONG>o</STRONG> The values that are stored at the addresses pointed to by the last
+ three arguments are in the range <STRONG>0</STRONG> (no component) through <STRONG>1000</STRONG>
(maximum amount of component), inclusive.
</PRE><H3><a name="h3-pair_content">pair_content</a></H3><PRE>
- The <STRONG>pair_content</STRONG> routine allows programmers to find out what colors a
- given color-pair consists of. It requires three arguments: the color-
+ The <STRONG>pair_content</STRONG> routine allows programmers to find out what colors a
+ given color-pair consists of. It requires three arguments: the color-
pair number, and two addresses of <STRONG>short</STRONG>s for storing the foreground and
the background color numbers.
- <STRONG>o</STRONG> The first argument must be a legal color value, i.e., in the range
+ <STRONG>o</STRONG> The first argument must be a legal color value, i.e., in the range
<STRONG>1</STRONG> through <STRONG>COLOR_PAIRS-1</STRONG>, inclusive.
- <STRONG>o</STRONG> The values that are stored at the addresses pointed to by the sec-
- ond and third arguments are in the range <STRONG>0</STRONG> through <STRONG>COLORS</STRONG>, inclu-
+ <STRONG>o</STRONG> The values that are stored at the addresses pointed to by the sec-
+ ond and third arguments are in the range <STRONG>0</STRONG> through <STRONG>COLORS</STRONG>, inclu-
sive.
</PRE><H3><a name="h3-PAIR_NUMBER">PAIR_NUMBER</a></H3><PRE>
- <STRONG>PAIR_NUMBER(</STRONG><EM>attrs</EM>) extracts the color value from its <EM>attrs</EM> parameter
+ <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.
</PRE><H3><a name="h3-COLOR_PAIR">COLOR_PAIR</a></H3><PRE>
Its inverse <STRONG>COLOR_PAIR(</STRONG><EM>n</EM><STRONG>)</STRONG> converts a color pair number to an attribute.
- 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
+ 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 functions such as <STRONG>attrset</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>ERR</STRONG>") upon successful com-
+ 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>ERR</STRONG>") upon successful com-
pletion.
- X/Open defines no error conditions. This implementation will return
- <STRONG>ERR</STRONG> on attempts to use color values outside the range <STRONG>0</STRONG> to <STRONG>COLORS</STRONG>-1
- (except for the default colors extension), or use color pairs outside
- the range <STRONG>0</STRONG> to <STRONG>COLOR_PAIRS-1</STRONG>. Color values used in <STRONG>init_color</STRONG> must be
+ X/Open defines no error conditions. This implementation will return
+ <STRONG>ERR</STRONG> on attempts to use color values outside the range <STRONG>0</STRONG> to <STRONG>COLORS</STRONG>-1
+ (except for the default colors extension), or use color pairs outside
+ the range <STRONG>0</STRONG> to <STRONG>COLOR_PAIRS-1</STRONG>. Color values used in <STRONG>init_color</STRONG> must be
in the range <STRONG>0</STRONG> to <STRONG>1000</STRONG>. An error is returned from all functions if the
terminal has not been initialized. An error is returned from secondary
functions such as <STRONG>init_pair</STRONG> if <STRONG>start_color</STRONG> was not called.
<STRONG>init_color</STRONG>
returns an error if the terminal does not support this feature,
- e.g., if the <STRONG>initialize_color</STRONG> capability is absent from the
+ e.g., if the <STRONG>initialize_color</STRONG> capability is absent from the
terminal description.
<STRONG>start_color</STRONG>
</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 associated <STRONG>COLORS</STRONG> and <STRONG>COL-</STRONG>
- <STRONG>OR_PAIRS</STRONG> counts for each screen; the <STRONG>start_color</STRONG> function only affects
+ In the <STRONG>ncurses</STRONG> implementation, there is a separate color activation
+ flag, color palette, color pairs table, and associated <STRONG>COLORS</STRONG> and <STRONG>COL-</STRONG>
+ <STRONG>OR_PAIRS</STRONG> counts for each screen; the <STRONG>start_color</STRONG> function only affects
the current screen. The SVr4/XSI interface is not really designed with
- this in mind, and historical implementations may use a single shared
+ this in mind, and historical implementations may use a single shared
color palette.
- Setting an implicit background color via a color pair affects only
- character cells that a character write operation explicitly touches.
- To change the background color used when parts of a window are blanked
+ Setting an implicit background color via a color pair affects only
+ character cells that a character write operation explicitly touches.
+ To change the background color used when parts of a window are blanked
by erasing or scrolling operations, see <STRONG><A HREF="curs_bkgd.3x.html">curs_bkgd(3x)</A></STRONG>.
- Several caveats apply on older x86 machines (e.g., i386, i486) with
+ Several caveats apply on older x86 machines (e.g., i386, i486) with
VGA-compatible graphics:
- <STRONG>o</STRONG> COLOR_YELLOW is actually brown. To get yellow, use COLOR_YELLOW
+ <STRONG>o</STRONG> COLOR_YELLOW is actually brown. To get yellow, use COLOR_YELLOW
combined with the <STRONG>A_BOLD</STRONG> attribute.
- <STRONG>o</STRONG> The A_BLINK attribute should in theory cause the background to go
+ <STRONG>o</STRONG> The A_BLINK attribute should in theory cause the background to go
bright. This often fails to work, and even some cards for which it
- mostly works (such as the Paradise and compatibles) do the wrong
- thing when you try to set a bright "yellow" background (you get a
+ mostly works (such as the Paradise and compatibles) do the wrong
+ thing when you try to set a bright "yellow" background (you get a
blinking yellow foreground instead).
<STRONG>o</STRONG> Color RGB values are not settable.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- This implementation satisfies XSI Curses's minimum maximums for <STRONG>COLORS</STRONG>
+ This implementation satisfies XSI Curses's minimum maximums for <STRONG>COLORS</STRONG>
and <STRONG>COLOR_PAIRS</STRONG>.
- The <STRONG>init_pair</STRONG> routine accepts negative values of foreground and back-
- ground color to support the <STRONG><A HREF="default_colors.3x.html">use_default_colors(3x)</A></STRONG> extension, but only
+ The <STRONG>init_pair</STRONG> routine accepts negative values of foreground and back-
+ ground color to support the <STRONG><A HREF="default_colors.3x.html">use_default_colors(3x)</A></STRONG> extension, but only
if that routine has been first invoked.
The assumption that <STRONG>COLOR_BLACK</STRONG> is the default background color for all
- terminals can be modified using the <STRONG><A HREF="default_colors.3x.html">assume_default_colors(3x)</A></STRONG> exten-
+ terminals can be modified using the <STRONG><A HREF="default_colors.3x.html">assume_default_colors(3x)</A></STRONG> exten-
sion.
- This implementation checks the pointers, e.g., for the values returned
+ This implementation checks the pointers, e.g., for the values returned
by <STRONG>color_content</STRONG> and <STRONG>pair_content</STRONG>, and will treat those as optional pa-
rameters when null.
- X/Open Curses does not specify a limit for the number of colors and
+ X/Open Curses does not specify a limit for the number of colors and
color pairs which a terminal can support. However, in its use of <STRONG>short</STRONG>
- for the parameters, it carries over SVr4's implementation detail for
+ for the parameters, it carries over SVr4's implementation detail for
the compiled terminfo database, which uses signed 16-bit numbers. This
- implementation provides extended versions of those functions which use
- <STRONG>short</STRONG> parameters, allowing applications to use larger color- and pair-
+ implementation provides extended versions of those functions which use
+ <STRONG>short</STRONG> parameters, allowing applications to use larger color- and pair-
numbers.
+ The <STRONG>reset_color_pairs</STRONG> function is an extension of ncurses.
+
</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><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>, <STRONG>de-</STRONG>
+ <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><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>, <STRONG>de-</STRONG>
<STRONG><A HREF="default_colors.3x.html">fault_colors(3x)</A></STRONG>
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