mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/****************************************************************************
|
|
* Copyright 2018,2020 Thomas E. Dickey *
|
|
* *
|
|
* 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: parse_rgb.h,v 1.5 2020/02/02 23:34:34 tom Exp $
|
|
*
|
|
* Sample implementation of ncurses RGB extension from user_caps(5).
|
|
*/
|
|
#ifndef PARSE_RBG_H_incl
|
|
#define PARSE_RBG_H_incl 1
|
|
|
|
#include <test.priv.h>
|
|
|
|
#if HAVE_TIGETSTR && USE_WIDEC_SUPPORT
|
|
static int
|
|
parse_rgb(int *r_max, int *g_max, int *b_max)
|
|
{
|
|
int colors = tigetnum("colors");
|
|
int result = ERR;
|
|
|
|
*r_max = *g_max = *b_max = 0;
|
|
|
|
if (colors > 0) {
|
|
int max_bits;
|
|
int bits;
|
|
int pwr2;
|
|
int r = 0, g = 0, b = 0;
|
|
char *data;
|
|
char ch;
|
|
|
|
for (max_bits = 0, pwr2 = 1;
|
|
pwr2 < colors;
|
|
++max_bits, pwr2 <<= 1) {
|
|
;
|
|
}
|
|
|
|
if (tigetflag("RGB") > 0) {
|
|
result = OK;
|
|
r = g = b = (max_bits + 2) / 3;
|
|
} else if ((bits = tigetnum("RGB")) > 0) {
|
|
result = OK;
|
|
r = g = b = bits;
|
|
} else if ((data = tigetstr("RGB")) != ABSENT_STRING
|
|
&& data != CANCELLED_STRING
|
|
&& sscanf(data, "%d/%d/%d%c", &r, &g, &b, &ch) == 3) {
|
|
result = OK;
|
|
}
|
|
|
|
if ((r + g + b) < max_bits) {
|
|
result = ERR;
|
|
} else if (result == 0) {
|
|
if (r > max_bits) {
|
|
r = max_bits;
|
|
g = b = 0;
|
|
}
|
|
*r_max = r;
|
|
if (g > (max_bits -= r)) {
|
|
g = max_bits;
|
|
b = 0;
|
|
}
|
|
*g_max = g;
|
|
if (b > (max_bits -= g)) {
|
|
b = max_bits;
|
|
}
|
|
*b_max = b;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
#else
|
|
#define parse_rgb(r,g,b) (ERR)
|
|
#endif
|
|
|
|
#endif /* PARSE_RBG_H_incl */
|