93 lines
1.8 KiB
C++
93 lines
1.8 KiB
C++
#pragma once
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#include <iomanip>
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#include "common.hpp"
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#include "utils/string.hpp"
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LEMONBUDDY_NS
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union rgba {
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struct {
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uint8_t r;
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uint8_t g;
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uint8_t b;
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uint8_t a;
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};
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uint32_t v;
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};
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class color;
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static map<string, color> g_colorstore;
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class color {
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public:
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explicit color(string hex) : m_hex(string_util::upper(hex)) {
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m_rgba.v = static_cast<uint32_t>(strtoul(&hex[1], nullptr, 16));
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// premultiply alpha
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m_rgba.r = m_rgba.r * m_rgba.a / 255;
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m_rgba.g = m_rgba.g * m_rgba.a / 255;
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m_rgba.b = m_rgba.b * m_rgba.a / 255;
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}
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explicit color(uint32_t v) {
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char buffer[7];
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snprintf(buffer, sizeof(buffer), "%06x", v);
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m_hex = "#" + string{buffer};
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m_rgba.v = v;
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}
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uint32_t value() const {
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return m_rgba.v;
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}
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string rgb() const {
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// clang-format off
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return string_util::from_stream(stringstream()
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<< "#"
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<< std::setw(6)
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<< std::setfill('0')
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<< std::hex
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<< std::uppercase
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<< (m_rgba.v & 0x00FFFFFF));
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// clang-format on
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}
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string hex() const {
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return m_hex;
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}
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static auto parse(string input, color fallback) {
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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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string hex{input};
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if (hex.substr(0, 1) != "#")
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hex = "#" + hex;
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if (hex.length() == 4)
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hex = {'#', hex[1], hex[1], hex[2], hex[2], hex[3], hex[3]};
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if (hex.length() == 7)
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hex = "#FF" + hex.substr(1);
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if (hex.length() != 9)
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return fallback;
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color result{hex};
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g_colorstore.emplace(input, result);
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return result;
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}
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static auto parse(string input) {
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static color none{0};
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return parse(input, none);
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}
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protected:
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rgba m_rgba;
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string m_hex;
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};
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static color g_colorblack{"#ff000000"};
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static color g_colorwhite{"#ffffffff"};
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LEMONBUDDY_NS_END
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