96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
#pragma once
|
|
|
|
#include <iomanip>
|
|
|
|
#include "common.hpp"
|
|
#include "utils/string.hpp"
|
|
#include "x11/xlib.hpp"
|
|
|
|
LEMONBUDDY_NS
|
|
|
|
namespace color_util {
|
|
template <typename T = uint8_t>
|
|
T alpha_channel(const uint32_t value) {
|
|
uint8_t a = value >> 24;
|
|
if (std::is_same<T, uint8_t>::value)
|
|
return a << 8 / 0xff;
|
|
else if (std::is_same<T, uint16_t>::value)
|
|
return a << 8 | a << 8 / 0xff;
|
|
}
|
|
|
|
template <typename T = uint8_t>
|
|
T red_channel(const uint32_t value) {
|
|
uint8_t r = value >> 16;
|
|
if (std::is_same<T, uint8_t>::value)
|
|
return r << 8 / 0xff;
|
|
else if (std::is_same<T, uint16_t>::value)
|
|
return r << 8 | r << 8 / 0xff;
|
|
}
|
|
|
|
template <typename T = uint8_t>
|
|
T green_channel(const uint32_t value) {
|
|
uint8_t g = value >> 8;
|
|
if (std::is_same<T, uint8_t>::value)
|
|
return g << 8 / 0xff;
|
|
else if (std::is_same<T, uint16_t>::value)
|
|
return g << 8 | g << 8 / 0xff;
|
|
}
|
|
|
|
template <typename T = uint8_t>
|
|
T blue_channel(const uint32_t value) {
|
|
uint8_t b = value;
|
|
if (std::is_same<T, uint8_t>::value)
|
|
return b << 8 / 0xff;
|
|
else if (std::is_same<T, uint16_t>::value)
|
|
return b << 8 | b << 8 / 0xff;
|
|
}
|
|
|
|
template <typename T = uint32_t>
|
|
uint32_t premultiply_alpha(const T value) {
|
|
auto a = color_util::alpha_channel(value);
|
|
auto r = color_util::red_channel(value) * a / 255;
|
|
auto g = color_util::green_channel(value) * a / 255;
|
|
auto b = color_util::blue_channel(value) * a / 255;
|
|
return (a << 24) | (r << 16) | (g << 8) | b;
|
|
}
|
|
|
|
template <typename T = uint8_t>
|
|
string hex(uint32_t color) {
|
|
char s[12];
|
|
size_t len = 0;
|
|
|
|
uint8_t a = alpha_channel<T>(color);
|
|
uint8_t r = red_channel<T>(color);
|
|
uint8_t g = green_channel<T>(color);
|
|
uint8_t b = blue_channel<T>(color);
|
|
|
|
if (std::is_same<T, uint16_t>::value) {
|
|
len = snprintf(s, sizeof(s), "#%02x%02x%02x%02x", a, r, g, b);
|
|
} else if (std::is_same<T, uint8_t>::value) {
|
|
len = snprintf(s, sizeof(s), "#%02x%02x%02x", r, g, b);
|
|
}
|
|
|
|
return string{s, 0, len};
|
|
}
|
|
|
|
inline string parse_hex(string hex) {
|
|
if (hex.substr(0, 1) != "#")
|
|
hex = "#" + hex;
|
|
if (hex.length() == 4)
|
|
hex = {'#', hex[1], hex[1], hex[2], hex[2], hex[3], hex[3]};
|
|
if (hex.length() == 7)
|
|
hex = "#ff" + hex.substr(1);
|
|
if (hex.length() != 9)
|
|
return "";
|
|
return hex;
|
|
}
|
|
|
|
inline uint32_t parse(string hex) {
|
|
if ((hex = parse_hex(hex)).empty())
|
|
return 0U;
|
|
return std::strtoul(&hex[1], nullptr, 16);
|
|
}
|
|
}
|
|
|
|
LEMONBUDDY_NS_END
|