ncurses 5.7 - patch 20100403

[ncurses.git] / man / curs_color.3x

diff --git a/man/curs_color.3x b/man/curs_color.3x
index 7ca76907b59f0781c619bfe331a392d69a353f24..801ac9fa6b0029f3e8a09939a5ed554a2729880c 100644 (file)
--- a/man/curs_color.3x
+++ b/man/curs_color.3x
@@ -1,5 +1,5 @@
 .\"***************************************************************************
 .\"***************************************************************************

-.\" Copyright (c) 1998-2004,2005 Free Software Foundation, Inc.              *
+.\" Copyright (c) 1998-2005,2009 Free Software Foundation, Inc.              *

 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *


@@ -26,7 +26,7 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"

-.\" $Id: curs_color.3x,v 1.27 2005/05/15 16:55:36 tom Exp $
+.\" $Id: curs_color.3x,v 1.29 2009/01/24 23:10:02 tom Exp $

 .TH curs_color 3X ""
 .na
 .hy 0
 .TH curs_color 3X ""
 .na
 .hy 0


@@ -68,7 +68,7 @@ color (for the blank field on which the characters are displayed).  A
 programmer initializes a color-pair with the routine \fBinit_pair\fR.  After it
 has been initialized, \fBCOLOR_PAIR\fR(\fIn\fR), a macro defined in
 \fB<curses.h>\fR, can be used as a new video attribute.
 programmer initializes a color-pair with the routine \fBinit_pair\fR.  After it
 has been initialized, \fBCOLOR_PAIR\fR(\fIn\fR), a macro defined in
 \fB<curses.h>\fR, can be used as a new video attribute.

-.SP
+.PP

 If a terminal is capable of redefining colors, the programmer can use the
 routine \fBinit_color\fR to change the definition of a color.  The routines
 \fBhas_colors\fR and \fBcan_change_color\fR return \fBTRUE\fR or \fBFALSE\fR,
 If a terminal is capable of redefining colors, the programmer can use the
 routine \fBinit_color\fR to change the definition of a color.  The routines
 \fBhas_colors\fR and \fBcan_change_color\fR return \fBTRUE\fR or \fBFALSE\fR,


@@ -88,7 +88,7 @@ and white), and two global variables, \fBCOLORS\fR and
 and color-pairs the terminal can support).  It also restores the
 colors on the terminal to the values they had when the terminal was
 just turned on.
 and color-pairs the terminal can support).  It also restores the
 colors on the terminal to the values they had when the terminal was
 just turned on.

-.SP
+.PP

 The \fBinit_pair\fR routine changes the definition of a color-pair.  It takes
 three arguments: the number of the color-pair to be changed, the foreground
 color number, and the background color number.
 The \fBinit_pair\fR routine changes the definition of a color-pair.  It takes
 three arguments: the number of the color-pair to be changed, the foreground
 color number, and the background color number.


@@ -96,7 +96,10 @@ For portable applications:
 .TP 5
 -
 The value of the first argument
 .TP 5
 -
 The value of the first argument

-must be between \fB1\fR and \fBCOLOR_PAIRS-1\fR.
+must be between \fB1\fR and \fBCOLOR_PAIRS-1\fR,
+except that if default colors are used (see \fBuse_default_colors\fP)
+the upper limit is adjusted to allow for extra pairs which use
+a default color in foreground and/or background.

 .TP 5
 -
 The value of the second and
 .TP 5
 -
 The value of the second and


@@ -108,12 +111,12 @@ It cannot be modified by the application.
 If the color-pair was previously
 initialized, the screen is refreshed and all occurrences of that color-pair
 are changed to the new definition.
 If the color-pair was previously
 initialized, the screen is refreshed and all occurrences of that color-pair
 are changed to the new definition.

-.SP
+.PP

 As an extension, ncurses allows you to set color pair 0 via
 the \fBassume_default_colors\fR routine, or to specify the use of
 default colors (color number \fB-1\fR) if you first invoke the
 \fBuse_default_colors\fR routine.
 As an extension, ncurses allows you to set color pair 0 via
 the \fBassume_default_colors\fR routine, or to specify the use of
 default colors (color number \fB-1\fR) if you first invoke the
 \fBuse_default_colors\fR routine.

-.SP
+.PP

 The \fBinit_color\fR 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).  The value of the first
 The \fBinit_color\fR 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).  The value of the first


@@ -122,18 +125,18 @@ argument must be between \fB0\fR and \fBCOLORS\fR.  (See the section
 must be a value between 0 and 1000.  When \fBinit_color\fR is used, all
 occurrences of that color on the screen immediately change to the new
 definition.
 must be a value between 0 and 1000.  When \fBinit_color\fR is used, all
 occurrences of that color on the screen immediately change to the new
 definition.

-.SP
+.PP

 The \fBhas_colors\fR routine requires no arguments.  It returns \fBTRUE\fR if
 the terminal can manipulate colors; otherwise, it returns \fBFALSE\fR.  This
 routine facilitates writing terminal-independent programs.  For example, a
 programmer can use it to decide whether to use color or some other video
 attribute.
 The \fBhas_colors\fR routine requires no arguments.  It returns \fBTRUE\fR if
 the terminal can manipulate colors; otherwise, it returns \fBFALSE\fR.  This
 routine facilitates writing terminal-independent programs.  For example, a
 programmer can use it to decide whether to use color or some other video
 attribute.

-.SP
+.PP

 The \fBcan_change_color\fR routine requires no arguments.  It returns
 \fBTRUE\fR if the terminal supports colors and can change their definitions;
 other, it returns \fBFALSE\fR.  This routine facilitates writing
 terminal-independent programs.
 The \fBcan_change_color\fR routine requires no arguments.  It returns
 \fBTRUE\fR if the terminal supports colors and can change their definitions;
 other, it returns \fBFALSE\fR.  This routine facilitates writing
 terminal-independent programs.

-.SP
+.PP

 The \fBcolor_content\fR 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 \fBshort\fRs for storing
 The \fBcolor_content\fR 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 \fBshort\fRs for storing


@@ -142,7 +145,7 @@ given color.  The value of the first argument must be between 0 and
 \fBCOLORS\fR.  The values that are stored at the addresses pointed to by the
 last three arguments are between 0 (no component) and 1000 (maximum amount of
 component).
 \fBCOLORS\fR.  The values that are stored at the addresses pointed to by the
 last three arguments are between 0 (no component) and 1000 (maximum amount of
 component).

-.SP
+.PP

 The \fBpair_content\fR 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 \fBshort\fRs for storing the foreground and the
 The \fBpair_content\fR 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 \fBshort\fRs for storing the foreground and the


@@ -153,7 +156,7 @@ to by the second and third arguments are between 0 and \fBCOLORS\fR.
 In \fB<curses.h>\fR the following macros are defined.  These are the default
 colors.  \fBcurses\fR also assumes that \fBCOLOR_BLACK\fR is the default
 background color for all terminals.
 In \fB<curses.h>\fR the following macros are defined.  These are the default
 colors.  \fBcurses\fR also assumes that \fBCOLOR_BLACK\fR is the default
 background color for all terminals.

-.SP
+.PP

 .nf
       \fBCOLOR_BLACK\fR
       \fBCOLOR_RED\fR
 .nf
       \fBCOLOR_BLACK\fR
       \fBCOLOR_RED\fR


@@ -167,7 +170,7 @@ background color for all terminals.
 .SH RETURN VALUE
 The routines \fBcan_change_color()\fR and \fBhas_colors()\fR return \fBTRUE\fR
 or \fBFALSE\fR.
 .SH RETURN VALUE
 The routines \fBcan_change_color()\fR and \fBhas_colors()\fR return \fBTRUE\fR
 or \fBFALSE\fR.

-.SP
+.PP

 All other routines return the integer \fBERR\fR upon failure and an \fBOK\fR
 (SVr4 specifies only "an integer value other than \fBERR\fR") upon successful
 completion.
 All other routines return the integer \fBERR\fR upon failure and an \fBOK\fR
 (SVr4 specifies only "an integer value other than \fBERR\fR") upon successful
 completion.


@@ -199,12 +202,12 @@ color palette, color pairs table, and associated COLORS and COLOR_PAIRS counts
 for each screen; the \fBstart_color\fR 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 color palette.
 for each screen; the \fBstart_color\fR 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 color palette.

-.SP
+.PP

 Note that 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 \fBcurs_bkgd\fR(3X).
 Note that 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 \fBcurs_bkgd\fR(3X).

-.SP
+.PP

 Several caveats apply on 386 and 486 machines with VGA-compatible graphics:
 .TP 5
 -
 Several caveats apply on 386 and 486 machines with VGA-compatible graphics:
 .TP 5
 -