mirror of https://github.com/polybar/polybar.git
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
#include <iomanip>
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#include <utility>
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#include <map>
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#include "errors.hpp"
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#include "utils/color.hpp"
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#include "utils/string.hpp"
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#include "x11/color.hpp"
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POLYBAR_NS
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std::map<string, color> g_colorstore;
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color g_colorempty{"#00000000"};
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color g_colorblack{"#ff000000"};
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color g_colorwhite{"#ffffffff"};
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color::color(string hex) : m_source(hex) {
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if (hex.empty()) {
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throw application_error("Cannot create color from empty hex");
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}
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m_value = std::strtoul(&hex[1], nullptr, 16);
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// Premultiply alpha
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auto a = color_util::alpha_channel(m_value);
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auto r = color_util::red_channel(m_value) * a / 255;
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auto g = color_util::green_channel(m_value) * a / 255;
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auto b = color_util::blue_channel(m_value) * a / 255;
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m_color = (a << 24) | (r << 16) | (g << 8) | b;
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}
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string color::source() const {
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return m_source;
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}
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color::operator XRenderColor() const {
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XRenderColor x;
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x.red = color_util::red_channel<uint16_t>(m_color);
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x.green = color_util::green_channel<uint16_t>(m_color);
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x.blue = color_util::blue_channel<uint16_t>(m_color);
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x.alpha = color_util::alpha_channel<uint16_t>(m_color);
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return x;
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}
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color::operator string() const {
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return color_util::hex<uint8_t>(m_color);
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}
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color::operator uint32_t() const {
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return m_color;
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}
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color color::parse(string input, color fallback) {
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if (input.empty()) {
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throw application_error("Cannot parse empty color");
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}
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auto it = g_colorstore.find(input);
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if (it != g_colorstore.end()) {
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return it->second;
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}
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if ((input = color_util::parse_hex(input)).empty()) {
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return fallback;
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}
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color result{input};
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g_colorstore.emplace_hint(it, input, result);
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return result;
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}
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color color::parse(string input) {
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return parse(move(input), g_colorempty);
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}
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POLYBAR_NS_END
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