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Description of default colors (could be better); another place for

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pair_content().
This commit is contained in:
William McBrine
2006-12-20 03:52:43 +00:00
parent c09da0a9df
commit 2efedc66ab
1 changed files with 34 additions and 24 deletions
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58
pdcurses/color.c
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@@ -15,7 +15,7 @@
#include <stdlib.h>
#include <string.h>
RCSID("$Id: color.c,v 1.72 2006/12/20 03:27:10 wmcbrine Exp $");
RCSID("$Id: color.c,v 1.73 2006/12/20 03:52:43 wmcbrine Exp $");
/*man-start**************************************************************
@@ -36,27 +36,27 @@ RCSID("$Id: color.c,v 1.72 2006/12/20 03:27:10 wmcbrine Exp $");
int PDC_set_line_color(short color);
X/Open Description:
To use these routines, start_color() must be called, usually
immediately after initscr(). Colors are always used in pairs
refered to as color-pairs. A color-pair consists of a foreground
color and a background color. A color-pair is initialized with
init_pair(). After it has been initialized, COLOR_PAIR(n) can be
To use these routines, start_color() must be called, usually
immediately after initscr(). Colors are always used in pairs
refered to as color-pairs. A color-pair consists of a foreground
color and a background color. A color-pair is initialized with
init_pair(). After it has been initialized, COLOR_PAIR(n) can be
used like any other video attribute.
start_color() initializes eight basic colors (black, red, green,
yellow, blue, magenta, cyan, and white), and two global
variables; COLORS and COLOR_PAIRS (respectively defining the
maximum number of colors and color-pairs the terminal is capable
start_color() initializes eight basic colors (black, red, green,
yellow, blue, magenta, cyan, and white), and two global
variables; COLORS and COLOR_PAIRS (respectively defining the
maximum number of colors and color-pairs the terminal is capable
of displaying).
init_pair() changes the definitions of a color-pair. The routine
takes three arguments: the number of the color-pair to be
redefined, and the new values of the foreground and background
colors. The value of color-pair must be between 0 and
COLOR_PAIRS - 1, inclusive. The values of foreground and
background must be between 0 and COLORS - 1, inclusive. If the
color pair was previously initialized, the screen is refreshed
and all occurrences of that color-pair are changed to the new
init_pair() changes the definitions of a color-pair. The routine
takes three arguments: the number of the color-pair to be
redefined, and the new values of the foreground and background
colors. The value of color-pair must be between 0 and
COLOR_PAIRS - 1, inclusive. The values of foreground and
background must be between 0 and COLORS - 1, inclusive. If the
color pair was previously initialized, the screen is refreshed
and all occurrences of that color-pair are changed to the new
definition.
has_colors() indicates if the terminal supports, and can
@@ -69,10 +69,21 @@ RCSID("$Id: color.c,v 1.72 2006/12/20 03:27:10 wmcbrine Exp $");
color-pair consist of.
PDCurses Description:
PDC_set_line_color() is used to set the color, globally, for the
color of the lines drawn for the attributes: A_UNDERLINE,
A_OVERLINE, A_LEFTLINE and A_RIGHTLINE. A value of -1 (the
default) indicates that the current foreground color should be
assume_default_colors() and use_default_colors() emulate the
ncurses extensions of the same names. assume_default_colors(f,
b) is essentially the same as init_pair(0, f, b) (which isn't
allowed); it redefines the default colors. use_default_colors()
allows the use of -1 as a foreground or background color with
init_pair(), and calls assume_default_colors(-1, -1); -1
represents the foreground or background color that the terminal
had at startup. If the environment variable PDC_ORIGINAL_COLORS
is set at the time start_color() is called, that's equivalent to
calling use_default_colors().
PDC_set_line_color() is used to set the color, globally, for
the color of the lines drawn for the attributes: A_UNDERLINE,
A_OVERLINE, A_LEFTLINE and A_RIGHTLINE. A value of -1 (the
default) indicates that the current foreground color should be
used.
NOTE: COLOR_PAIR() and PAIR_NUMBER() are implemented as macros.
@@ -277,8 +288,7 @@ int assume_default_colors(int f, int b)
_normalize(&fg, &bg);
oldfg = (short)(pdc_atrtab[0] & 0x0F);
oldbg = (short)((pdc_atrtab[0] & 0xF0) >> 4);
pair_content(0, &oldfg, &oldbg);
if (oldfg != fg || oldbg != bg)
curscr->_clear = TRUE;