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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><!-- **************************************************************************** * Copyright (c) 1998-2004,2005 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 * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * **************************************************************************** * @Id: curs_color.3x,v 1.27 2005/05/15 16:55:36 tom Exp @--><HTML><HEAD><TITLE>curs_color 3x</TITLE><link rev=made href="mailto:bug-ncurses@gnu.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></HEAD><BODY><H1>curs_color 3x</H1><HR><PRE><!-- Manpage converted by man2html 3.0.1 --><STRONG><A HREF="curs_color.3x.html">curs_color(3x)</A></STRONG> <STRONG><A HREF="curs_color.3x.html">curs_color(3x)</A></STRONG></PRE><H2>NAME</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</PRE><H2>SYNOPSIS</H2><PRE> <STRONG>#</STRONG> <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></PRE><H2>DESCRIPTION</H2><PRE> <STRONG>Overview</STRONG> <STRONG>curses</STRONG> support color attributes on terminals with that ca- pability. To use these routines <STRONG>start_color</STRONG> must be called, usually right after <STRONG>initscr</STRONG>. Colors are always used in pairs (referred to as color-pairs). A color-pair consists of a foreground color (for characters) and a 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. If a terminal is capable of redefining colors, the programmer can use the routine <STRONG>init_color</STRONG> to change the definition of a color. The routines <STRONG>has_colors</STRONG> and <STRONG>can_change_color</STRONG> return <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>, depending on whether the terminal has color ca- pabilities and whether the programmer can change the col- ors. The routine <STRONG>color_content</STRONG> allows a programmer to ex- tract the amounts of red, green, and blue components in an initialized color. The routine <STRONG>pair_content</STRONG> allows a pro- grammer to find out how a given color-pair is currently defined. <STRONG>Routine</STRONG> <STRONG>Descriptions</STRONG> 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 good practice to call this routine right after <STRONG>initscr</STRONG>. <STRONG>start_color</STRONG> initializes eight basic colors (black, red, green, yellow, blue, magenta, cyan, and white), and two global variables, <STRONG>COLORS</STRONG> and <STRONG>COLOR_PAIRS</STRONG> (respectively defining the maximum number of colors 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. The <STRONG>init_pair</STRONG> 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. For portable applica- tions: - The value of the first argument must be between <STRONG>1</STRONG> and <STRONG>COLOR_PAIRS-1</STRONG>. - The value of the second and third arguments must be between 0 and <STRONG>COLORS</STRONG>. Color pair 0 is assumed to be white on black, but is actually whatever the terminal implements before color is initialized. 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. As an extension, ncurses allows you to set color pair 0 via the <STRONG>assume_default_col-</STRONG> <STRONG>ors</STRONG> routine, or to specify the use of default colors (col- or number <STRONG>-1</STRONG>) if you first invoke the <STRONG>use_default_colors</STRONG> routine. 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). The value of the first argument must be between <STRONG>0</STRONG> and <STRONG>COLORS</STRONG>. (See the section <STRONG>Colors</STRONG> for the default color index.) Each of the last three arguments must be a value between 0 and 1000. When <STRONG>init_color</STRONG> is used, all occurrences of that color on the screen immediately change to the new definition. The <STRONG>has_colors</STRONG> routine requires no arguments. It returns <STRONG>TRUE</STRONG>⌨️ 快捷键说明
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