mirror of
https://github.com/Aigor44/ncursesw-morphos.git
synced 2024-12-27 07:49:06 +08:00
9da7d09296
+ minor fixes to test/*.h to make them idempotent.
+ add/use test/parse_rgb.h to show how the "RGB" capability works.
+ add a clarification in user_caps.5 regarding "RGB" capability.
+ add extended_slk_color{,_sp} symbols to the appropriate
package/*.{map,sym} files (report by Sven Joachim, cf: 20170401).
99 lines
3.4 KiB
C
99 lines
3.4 KiB
C
/****************************************************************************
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* Copyright (c) 2018 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/*
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* $Id: parse_rgb.h,v 1.4 2018/02/03 23:40:53 tom Exp $
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*
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* Sample implementation of ncurses RGB extension from user_caps(5).
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*/
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#ifndef PARSE_RBG_H_incl
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#define PARSE_RBG_H_incl 1
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#include <test.priv.h>
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#if HAVE_TIGETSTR && USE_WIDEC_SUPPORT
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static int
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parse_rgb(int *r_max, int *g_max, int *b_max)
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{
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int colors = tigetnum("colors");
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int result = ERR;
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*r_max = *g_max = *b_max = 0;
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if (colors > 0) {
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int max_bits;
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int bits;
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int pwr2;
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int r = 0, g = 0, b = 0;
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char *data;
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char ch;
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for (max_bits = 0, pwr2 = 1;
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pwr2 < colors;
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++max_bits, pwr2 <<= 1) {
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;
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}
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if (tigetflag("RGB") > 0) {
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result = OK;
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r = g = b = (max_bits + 2) / 3;
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} else if ((bits = tigetnum("RGB")) > 0) {
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result = OK;
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r = g = b = bits;
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} else if ((data = tigetstr("RGB")) != ABSENT_STRING
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&& data != CANCELLED_STRING
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&& sscanf(data, "%d/%d/%d%c", &r, &g, &b, &ch) == 3) {
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result = OK;
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}
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if ((r + g + b) < max_bits) {
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result = ERR;
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} else if (result == 0) {
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if (r > max_bits) {
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r = max_bits;
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g = b = 0;
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}
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*r_max = r;
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if (g > (max_bits -= r)) {
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g = max_bits;
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b = 0;
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}
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*g_max = g;
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if (b > (max_bits -= g)) {
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b = max_bits;
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}
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*b_max = b;
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}
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}
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return result;
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}
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#else
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#define parse_rgb(r,g,b) (ERR)
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#endif
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#endif /* PARSE_RBG_H_incl */
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