#include <curses.priv.h>
#include <term.h>
#include <tic.h>
MODULE_ID("$Id: lib_color.c,v 1.62 2002/09/28 20:40:05 tom Exp $")
NCURSES_EXPORT_VAR(int) COLOR_PAIRS = 0;
NCURSES_EXPORT_VAR(int) COLORS = 0;
#define DATA(r,g,b) {r,g,b, 0,0,0, 0}
#define RGB_ON 680
#define RGB_OFF 0
static const color_t cga_palette[] =
{
DATA(RGB_OFF, RGB_OFF, RGB_OFF),
DATA(RGB_ON, RGB_OFF, RGB_OFF),
DATA(RGB_OFF, RGB_ON, RGB_OFF),
DATA(RGB_ON, RGB_ON, RGB_OFF),
DATA(RGB_OFF, RGB_OFF, RGB_ON),
DATA(RGB_ON, RGB_OFF, RGB_ON),
DATA(RGB_OFF, RGB_ON, RGB_ON),
DATA(RGB_ON, RGB_ON, RGB_ON),
};
static const color_t hls_palette[] =
{
DATA( 0, 0, 0),
DATA( 120, 50, 100),
DATA( 240, 50, 100),
DATA( 180, 50, 100),
DATA( 330, 50, 100),
DATA( 60, 50, 100),
DATA( 300, 50, 100),
DATA( 0, 50, 100),
};
#if NCURSES_EXT_FUNCS
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
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(set_a_background, bg), 1, outc);
} else {
TPUTS_TRACE("set_background");
tputs(tparm(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(set_a_foreground, fg), 1, outc);
} else {
TPUTS_TRACE("set_foreground");
tputs(tparm(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 (n < 8) {
SP->_color_table[n] = tp[n];
} else {
SP->_color_table[n] = tp[n % 8];
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;
}
}
}
}
static bool
reset_color_pair(void)
{
bool result = FALSE;
if (orig_pair != 0) {
TPUTS_TRACE("orig_pair");
putp(orig_pair);
result = TRUE;
}
return result;
}
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->_coloron) {
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) {
COLOR_PAIRS = SP->_pair_count = max_pairs;
COLORS = SP->_color_count = max_colors;
if ((SP->_color_pairs = typeCalloc(unsigned short,
(unsigned) max_pairs)) != 0) {
if ((SP->_color_table = typeCalloc(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 {
FreeAndNull(SP->_color_pairs);
}
}
}
}
returnCode(OK);
}
static void
rgb2hls(short r, short g, short b, short *h, short *l, short *s)
{
short min, max, t;
if ((min = g < r ? g : r) > b)
min = b;
if ((max = g > r ? g : r) < b)
max = b;
*l = (min + max) / 20;
if (min == max) {
*h = 0;
*s = 0;
return;
}
if (*l < 50)
*s = ((max - min) * 100) / (max + min);
else
*s = ((max - min) * 100) / (2000 - max - min);
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;
}
NCURSES_EXPORT(int)
init_pair(short pair, short f, short b)
{
unsigned result;
T((T_CALLED("init_pair(%d,%d,%d)"), pair, f, b));
if ((pair < 0) || (pair >= COLOR_PAIRS))
returnCode(ERR);
#if NCURSES_EXT_FUNCS
if (SP->_default_color) {
if (f < 0)
f = C_MASK;
if (b < 0)
b = C_MASK;
if (f >= COLORS && f != C_MASK)
returnCode(ERR);
if (b >= COLORS && b != C_MASK)
returnCode(ERR);
} else
#endif
{
if ((f < 0) || (f >= COLORS)
|| (b < 0) || (b >= COLORS)
|| (pair < 1))
returnCode(ERR);
}
result = PAIR_OF(f, b);
if (SP->_color_pairs[pair] != 0
&& SP->_color_pairs[pair] != result) {
int y, x;
attr_t z = COLOR_PAIR(pair);
for (y = 0; y <= curscr->_maxy; y++) {
struct ldat *ptr = &(curscr->_line[y]);
bool changed = FALSE;
for (x = 0; x <= curscr->_maxx; x++) {
if ((AttrOf(ptr->text[x]) & A_COLOR) == z) {
SetChar(ptr->text[x], 0, 0);
CHANGED_CELL(ptr, x);
changed = TRUE;
}
}
if (changed)
_nc_make_oldhash(y);
}
}
SP->_color_pairs[pair] = result;
if ((int) (SP->_current_attr & A_COLOR) == COLOR_PAIR(pair))
SP->_current_attr |= A_COLOR;
if (initialize_pair) {
const color_t *tp = hue_lightness_saturation ? hls_palette : cga_palette;
T(("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));
if (initialize_pair) {
TPUTS_TRACE("initialize_pair");
putp(tparm(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
&& (color >= 0 && color < COLORS)
&& (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(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)
{
T((T_CALLED("color_content(%d,%p,%p,%p)"), color, r, g, b));
if (color < 0 || color >= COLORS)
returnCode(ERR);
if (r)
*r = SP->_color_table[color].red;
if (g)
*g = SP->_color_table[color].green;
if (b)
*b = SP->_color_table[color].blue;
T(("...color_content(%d,%d,%d,%d)", color, *r, *g, *b));
returnCode(OK);
}
NCURSES_EXPORT(int)
pair_content(short pair, short *f, short *b)
{
T((T_CALLED("pair_content(%d,%p,%p)"), pair, f, b));
if ((pair < 0) || (pair >= COLOR_PAIRS))
returnCode(ERR);
if (f)
*f = ((SP->_color_pairs[pair] >> C_SHIFT) & C_MASK);
if (b)
*b = (SP->_color_pairs[pair] & C_MASK);
T(("...pair_content(%d,%d,%d)", pair, *f, *b));
returnCode(OK);
}
NCURSES_EXPORT(void)
_nc_do_color(int old_pair, int pair, bool reverse, int (*outc) (int))
{
NCURSES_COLOR_T fg = C_MASK, bg = C_MASK;
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(set_color_pair, pair), 1, outc);
return;
} else if (SP != 0) {
pair_content(pair, &fg, &bg);
}
}
if (old_pair >= 0
&& SP != 0
&& pair_content(old_pair, &old_fg, &old_bg) != ERR) {
if ((fg == C_MASK && old_fg != C_MASK)
|| (bg == C_MASK && old_bg != C_MASK)) {
#if NCURSES_EXT_FUNCS
if (SP->_has_sgr_39_49 && old_bg == C_MASK && old_fg != C_MASK) {
tputs("\033[39m", 1, outc);
} else if (SP->_has_sgr_39_49 && old_fg == C_MASK && old_bg != C_MASK) {
tputs("\033[49m", 1, outc);
} else
#endif
reset_color_pair();
}
} else {
reset_color_pair();
if (old_pair < 0)
return;
}
#if NCURSES_EXT_FUNCS
if (fg == C_MASK)
fg = default_fg();
if (bg == C_MASK)
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 (fg != C_MASK) {
set_foreground_color(fg, outc);
}
if (bg != C_MASK) {
set_background_color(bg, outc);
}
}