| Current Path : /usr/src/contrib/ncurses/ncurses/base/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/ncurses/ncurses/base/lib_color.c |
/****************************************************************************
* Copyright (c) 1998-2006,2007 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. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/* lib_color.c
*
* Handles color emulation of SYS V curses
*/
#include <curses.priv.h>
#include <term.h>
#include <tic.h>
MODULE_ID("$Id: lib_color.c,v 1.85 2007/04/07 17:07:28 tom Exp $")
/*
* These should be screen structure members. They need to be globals for
* historical reasons. So we assign them in start_color() and also in
* set_term()'s screen-switching logic.
*/
#if USE_REENTRANT
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(COLOR_PAIRS) (void)
{
return SP ? SP->_pair_count : -1;
}
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(COLORS) (void)
{
return SP ? SP->_color_count : -1;
}
#else
NCURSES_EXPORT_VAR(int) COLOR_PAIRS = 0;
NCURSES_EXPORT_VAR(int) COLORS = 0;
#endif
#define DATA(r,g,b) {r,g,b, 0,0,0, 0}
#define TYPE_CALLOC(type,elts) typeCalloc(type, (unsigned)(elts))
#define MAX_PALETTE 8
#define OkColorHi(n) (((n) < COLORS) && ((n) < max_colors))
#define InPalette(n) ((n) >= 0 && (n) < MAX_PALETTE)
/*
* Given a RGB range of 0..1000, we'll normally set the individual values
* to about 2/3 of the maximum, leaving full-range for bold/bright colors.
*/
#define RGB_ON 680
#define RGB_OFF 0
/* *INDENT-OFF* */
static const color_t cga_palette[] =
{
/* R G B */
DATA(RGB_OFF, RGB_OFF, RGB_OFF), /* COLOR_BLACK */
DATA(RGB_ON, RGB_OFF, RGB_OFF), /* COLOR_RED */
DATA(RGB_OFF, RGB_ON, RGB_OFF), /* COLOR_GREEN */
DATA(RGB_ON, RGB_ON, RGB_OFF), /* COLOR_YELLOW */
DATA(RGB_OFF, RGB_OFF, RGB_ON), /* COLOR_BLUE */
DATA(RGB_ON, RGB_OFF, RGB_ON), /* COLOR_MAGENTA */
DATA(RGB_OFF, RGB_ON, RGB_ON), /* COLOR_CYAN */
DATA(RGB_ON, RGB_ON, RGB_ON), /* COLOR_WHITE */
};
static const color_t hls_palette[] =
{
/* H L S */
DATA( 0, 0, 0), /* COLOR_BLACK */
DATA( 120, 50, 100), /* COLOR_RED */
DATA( 240, 50, 100), /* COLOR_GREEN */
DATA( 180, 50, 100), /* COLOR_YELLOW */
DATA( 330, 50, 100), /* COLOR_BLUE */
DATA( 60, 50, 100), /* COLOR_MAGENTA */
DATA( 300, 50, 100), /* COLOR_CYAN */
DATA( 0, 50, 100), /* COLOR_WHITE */
};
/* *INDENT-ON* */
#if NCURSES_EXT_FUNCS
/*
* These are called from _nc_do_color(), which in turn is called from
* vidattr - so we have to assume that SP may be null.
*/
static int
default_fg(void)
{
return (SP != 0) ? SP->_default_fg : COLOR_WHITE;
}
static int
default_bg(void)
{
return SP != 0 ? SP->_default_bg : COLOR_BLACK;
}
#else
#define default_fg() COLOR_WHITE
#define default_bg() COLOR_BLACK
#endif
/*
* SVr4 curses is known to interchange color codes (1,4) and (3,6), possibly
* to maintain compatibility with a pre-ANSI scheme. The same scheme is
* also used in the FreeBSD syscons.
*/
static int
toggled_colors(int c)
{
if (c < 16) {
static const int table[] =
{0, 4, 2, 6, 1, 5, 3, 7,
8, 12, 10, 14, 9, 13, 11, 15};
c = table[c];
}
return c;
}
static void
set_background_color(int bg, int (*outc) (int))
{
if (set_a_background) {
TPUTS_TRACE("set_a_background");
tputs(TPARM_1(set_a_background, bg), 1, outc);
} else {
TPUTS_TRACE("set_background");
tputs(TPARM_1(set_background, toggled_colors(bg)), 1, outc);
}
}
static void
set_foreground_color(int fg, int (*outc) (int))
{
if (set_a_foreground) {
TPUTS_TRACE("set_a_foreground");
tputs(TPARM_1(set_a_foreground, fg), 1, outc);
} else {
TPUTS_TRACE("set_foreground");
tputs(TPARM_1(set_foreground, toggled_colors(fg)), 1, outc);
}
}
static void
init_color_table(void)
{
const color_t *tp;
int n;
tp = (hue_lightness_saturation) ? hls_palette : cga_palette;
for (n = 0; n < COLORS; n++) {
if (InPalette(n)) {
SP->_color_table[n] = tp[n];
} else {
SP->_color_table[n] = tp[n % MAX_PALETTE];
if (hue_lightness_saturation) {
SP->_color_table[n].green = 100;
} else {
if (SP->_color_table[n].red)
SP->_color_table[n].red = 1000;
if (SP->_color_table[n].green)
SP->_color_table[n].green = 1000;
if (SP->_color_table[n].blue)
SP->_color_table[n].blue = 1000;
}
}
}
}
/*
* Reset the color pair, e.g., to whatever color pair 0 is.
*/
static bool
reset_color_pair(void)
{
bool result = FALSE;
if (orig_pair != 0) {
TPUTS_TRACE("orig_pair");
putp(orig_pair);
result = TRUE;
}
return result;
}
/*
* Reset color pairs and definitions. Actually we do both more to accommodate
* badly-written terminal descriptions than for the relatively rare case where
* someone has changed the color definitions.
*/
bool
_nc_reset_colors(void)
{
int result = FALSE;
T((T_CALLED("_nc_reset_colors()")));
if (SP->_color_defs > 0)
SP->_color_defs = -(SP->_color_defs);
if (reset_color_pair())
result = TRUE;
if (orig_colors != 0) {
TPUTS_TRACE("orig_colors");
putp(orig_colors);
result = TRUE;
}
returnBool(result);
}
NCURSES_EXPORT(int)
start_color(void)
{
int result = ERR;
T((T_CALLED("start_color()")));
if (SP == 0) {
result = ERR;
} else if (SP->_coloron) {
result = OK;
} else {
if (reset_color_pair() != TRUE) {
set_foreground_color(default_fg(), _nc_outch);
set_background_color(default_bg(), _nc_outch);
}
if (max_pairs > 0 && max_colors > 0) {
SP->_pair_count = max_pairs;
SP->_color_count = max_colors;
#if !USE_REENTRANT
COLOR_PAIRS = max_pairs;
COLORS = max_colors;
#endif
if ((SP->_color_pairs = TYPE_CALLOC(colorpair_t,
max_pairs)) != 0) {
if ((SP->_color_table = TYPE_CALLOC(color_t,
max_colors)) != 0) {
SP->_color_pairs[0] = PAIR_OF(default_fg(), default_bg());
init_color_table();
T(("started color: COLORS = %d, COLOR_PAIRS = %d",
COLORS, COLOR_PAIRS));
SP->_coloron = 1;
result = OK;
} else if (SP->_color_pairs != 0) {
FreeAndNull(SP->_color_pairs);
}
}
} else {
result = OK;
}
}
returnCode(result);
}
/* This function was originally written by Daniel Weaver <danw@znyx.com> */
static void
rgb2hls(short r, short g, short b, short *h, short *l, short *s)
/* convert RGB to HLS system */
{
short min, max, t;
if ((min = g < r ? g : r) > b)
min = b;
if ((max = g > r ? g : r) < b)
max = b;
/* calculate lightness */
*l = (min + max) / 20;
if (min == max) { /* black, white and all shades of gray */
*h = 0;
*s = 0;
return;
}
/* calculate saturation */
if (*l < 50)
*s = ((max - min) * 100) / (max + min);
else
*s = ((max - min) * 100) / (2000 - max - min);
/* calculate hue */
if (r == max)
t = 120 + ((g - b) * 60) / (max - min);
else if (g == max)
t = 240 + ((b - r) * 60) / (max - min);
else
t = 360 + ((r - g) * 60) / (max - min);
*h = t % 360;
}
/*
* Extension (1997/1/18) - Allow negative f/b values to set default color
* values.
*/
NCURSES_EXPORT(int)
init_pair(short pair, short f, short b)
{
colorpair_t result;
T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b));
if ((pair < 0) || (pair >= COLOR_PAIRS) || SP == 0 || !SP->_coloron)
returnCode(ERR);
#if NCURSES_EXT_FUNCS
if (SP->_default_color) {
if (f < 0)
f = COLOR_DEFAULT;
if (b < 0)
b = COLOR_DEFAULT;
if (!OkColorHi(f) && !isDefaultColor(f))
returnCode(ERR);
if (!OkColorHi(b) && !isDefaultColor(b))
returnCode(ERR);
} else
#endif
{
if ((f < 0) || !OkColorHi(f)
|| (b < 0) || !OkColorHi(b)
|| (pair < 1))
returnCode(ERR);
}
/*
* When a pair's content is changed, replace its colors (if pair was
* initialized before a screen update is performed replacing original
* pair colors with the new ones).
*/
result = PAIR_OF(f, b);
if (SP->_color_pairs[pair] != 0
&& SP->_color_pairs[pair] != result) {
int y, x;
for (y = 0; y <= curscr->_maxy; y++) {
struct ldat *ptr = &(curscr->_line[y]);
bool changed = FALSE;
for (x = 0; x <= curscr->_maxx; x++) {
if (GetPair(ptr->text[x]) == pair) {
/* Set the old cell to zero to ensure it will be
updated on the next doupdate() */
SetChar(ptr->text[x], 0, 0);
CHANGED_CELL(ptr, x);
changed = TRUE;
}
}
if (changed)
_nc_make_oldhash(y);
}
}
SP->_color_pairs[pair] = result;
if (GET_SCREEN_PAIR(SP) == pair)
SET_SCREEN_PAIR(SP, (chtype) (~0)); /* force attribute update */
if (initialize_pair && InPalette(f) && InPalette(b)) {
const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette;
TR(TRACE_ATTRS,
("initializing pair: pair = %d, fg=(%d,%d,%d), bg=(%d,%d,%d)",
pair,
tp[f].red, tp[f].green, tp[f].blue,
tp[b].red, tp[b].green, tp[b].blue));
TPUTS_TRACE("initialize_pair");
putp(TPARM_7(initialize_pair,
pair,
tp[f].red, tp[f].green, tp[f].blue,
tp[b].red, tp[b].green, tp[b].blue));
}
returnCode(OK);
}
#define okRGB(n) ((n) >= 0 && (n) <= 1000)
NCURSES_EXPORT(int)
init_color(short color, short r, short g, short b)
{
int result = ERR;
T((T_CALLED("init_color(%d,%d,%d,%d)"), color, r, g, b));
if (initialize_color != NULL
&& SP != 0
&& SP->_coloron
&& (color >= 0 && OkColorHi(color))
&& (okRGB(r) && okRGB(g) && okRGB(b))) {
SP->_color_table[color].init = 1;
SP->_color_table[color].r = r;
SP->_color_table[color].g = g;
SP->_color_table[color].b = b;
if (hue_lightness_saturation) {
rgb2hls(r, g, b,
&SP->_color_table[color].red,
&SP->_color_table[color].green,
&SP->_color_table[color].blue);
} else {
SP->_color_table[color].red = r;
SP->_color_table[color].green = g;
SP->_color_table[color].blue = b;
}
TPUTS_TRACE("initialize_color");
putp(TPARM_4(initialize_color, color, r, g, b));
SP->_color_defs = max(color + 1, SP->_color_defs);
result = OK;
}
returnCode(result);
}
NCURSES_EXPORT(bool)
can_change_color(void)
{
T((T_CALLED("can_change_color()")));
returnCode((can_change != 0) ? TRUE : FALSE);
}
NCURSES_EXPORT(bool)
has_colors(void)
{
T((T_CALLED("has_colors()")));
returnCode((VALID_NUMERIC(max_colors) && VALID_NUMERIC(max_pairs)
&& (((set_foreground != NULL)
&& (set_background != NULL))
|| ((set_a_foreground != NULL)
&& (set_a_background != NULL))
|| set_color_pair)) ? TRUE : FALSE);
}
NCURSES_EXPORT(int)
color_content(short color, short *r, short *g, short *b)
{
int result;
T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b));
if (color < 0 || !OkColorHi(color) || SP == 0 || !SP->_coloron) {
result = ERR;
} else {
NCURSES_COLOR_T c_r = SP->_color_table[color].red;
NCURSES_COLOR_T c_g = SP->_color_table[color].green;
NCURSES_COLOR_T c_b = SP->_color_table[color].blue;
if (r)
*r = c_r;
if (g)
*g = c_g;
if (b)
*b = c_b;
TR(TRACE_ATTRS, ("...color_content(%d,%d,%d,%d)",
color, c_r, c_g, c_b));
result = OK;
}
returnCode(result);
}
NCURSES_EXPORT(int)
pair_content(short pair, short *f, short *b)
{
int result;
T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b));
if ((pair < 0) || (pair >= COLOR_PAIRS) || SP == 0 || !SP->_coloron) {
result = ERR;
} else {
NCURSES_COLOR_T fg = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK);
NCURSES_COLOR_T bg = (SP->_color_pairs[pair] & C_MASK);
#if NCURSES_EXT_FUNCS
if (fg == COLOR_DEFAULT)
fg = -1;
if (bg == COLOR_DEFAULT)
bg = -1;
#endif
if (f)
*f = fg;
if (b)
*b = bg;
TR(TRACE_ATTRS, ("...pair_content(%d,%d,%d)", pair, fg, bg));
result = OK;
}
returnCode(result);
}
NCURSES_EXPORT(void)
_nc_do_color(short old_pair, short pair, bool reverse, int (*outc) (int))
{
NCURSES_COLOR_T fg = COLOR_DEFAULT;
NCURSES_COLOR_T bg = COLOR_DEFAULT;
NCURSES_COLOR_T old_fg, old_bg;
if (pair < 0 || pair >= COLOR_PAIRS) {
return;
} else if (pair != 0) {
if (set_color_pair) {
TPUTS_TRACE("set_color_pair");
tputs(TPARM_1(set_color_pair, pair), 1, outc);
return;
} else if (SP != 0) {
pair_content((short) pair, &fg, &bg);
}
}
if (old_pair >= 0
&& SP != 0
&& pair_content(old_pair, &old_fg, &old_bg) != ERR) {
if ((isDefaultColor(fg) && !isDefaultColor(old_fg))
|| (isDefaultColor(bg) && !isDefaultColor(old_bg))) {
#if NCURSES_EXT_FUNCS
/*
* A minor optimization - but extension. If "AX" is specified in
* the terminal description, treat it as screen's indicator of ECMA
* SGR 39 and SGR 49, and assume the two sequences are independent.
*/
if (SP->_has_sgr_39_49
&& isDefaultColor(old_bg)
&& !isDefaultColor(old_fg)) {
tputs("\033[39m", 1, outc);
} else if (SP->_has_sgr_39_49
&& isDefaultColor(old_fg)
&& !isDefaultColor(old_bg)) {
tputs("\033[49m", 1, outc);
} else
#endif
reset_color_pair();
}
} else {
reset_color_pair();
if (old_pair < 0)
return;
}
#if NCURSES_EXT_FUNCS
if (isDefaultColor(fg))
fg = default_fg();
if (isDefaultColor(bg))
bg = default_bg();
#endif
if (reverse) {
NCURSES_COLOR_T xx = fg;
fg = bg;
bg = xx;
}
TR(TRACE_ATTRS, ("setting colors: pair = %d, fg = %d, bg = %d", pair,
fg, bg));
if (!isDefaultColor(fg)) {
set_foreground_color(fg, outc);
}
if (!isDefaultColor(bg)) {
set_background_color(bg, outc);
}
}