mirror of
https://github.com/Llewellynvdm/conky.git
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115 lines
3.0 KiB
C++
115 lines
3.0 KiB
C++
/*
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*
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* Conky, a system monitor, based on torsmo
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*
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* Any original torsmo code is licensed under the BSD license
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*
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* All code written since the fork of torsmo is licensed under the GPL
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*
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* Please see COPYING for details
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*
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* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
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* Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
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* (see AUTHORS)
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* All rights reserved.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "conky.h"
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#include "gui.h"
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#include "logging.h"
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#include "x11-color.h"
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#ifdef BUILD_X11
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std::unordered_map<Colour, unsigned long, Colour::Hash> Colour::x11_pixels;
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#endif /* BUILD_X11 */
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static int hex_nibble_value(char c) {
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if (c >= '0' && c <= '9') {
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return c - '0';
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} else if (c >= 'a' && c <= 'f') {
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return c - 'a' + 10;
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} else if (c >= 'A' && c <= 'F') {
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return c - 'A' + 10;
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}
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return -1;
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}
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Colour Colour::from_argb32(uint32_t argb) {
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Colour out;
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out.alpha = argb >> 24;
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out.red = (argb >> 16) % 256;
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out.green = (argb >> 8) % 256;
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out.blue = argb % 256;
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return out;
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}
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Colour error_colour{0xff, 0x00, 0x00, 0xff};
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Colour parse_color(const char *name) {
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unsigned short r, g, b;
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size_t len = strlen(name);
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// Parse X11 color names.
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if (OsLookupColor(-1, name, len, &r, &g, &b)) {
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Colour out = {(uint8_t)r, (uint8_t)g, (uint8_t)b, 0xff};
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return out;
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}
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// Remove a leading '#' if present.
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if (name[0] == '#') {
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name++;
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len--;
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}
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unsigned char argb[4] = {0xff, 0, 0, 0};
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if (len == 3 || len == 4) {
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bool skip_alpha = (len == 3);
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for (size_t i = 0; i < len; i ++) {
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int nib = hex_nibble_value(name[i]);
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if (nib < 0) { goto err; }
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// Duplicate the nibble, so "#abc" -> 0xaa, 0xbb, 0xcc
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int val = (nib << 4) + nib;
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argb[skip_alpha + i] = val;
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}
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} else if (len == 6 || len == 8) {
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bool skip_alpha = (len == 6);
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for (size_t i = 0; i + 1 < len; i += 2) {
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int nib1 = hex_nibble_value(name[i]);
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int nib2 = hex_nibble_value(name[i + 1]);
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if (nib1 < 0 || nib2 < 0) { goto err; }
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int val = (nib1 << 4) + nib2;
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argb[skip_alpha + i / 2] = val;
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}
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} else {
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goto err;
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}
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Colour out;
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out.alpha = argb[0];
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out.red = argb[1];
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out.green = argb[2];
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out.blue = argb[3];
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return out;
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err:
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NORM_ERR("can't parse X color '%s' (%d)", name, len);
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return error_colour;
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}
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Colour parse_color(const std::string &colour) {
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return parse_color(colour.c_str());
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}
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