98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
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#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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namespace color_util {
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template <typename ChannelType = uint8_t, typename ValueType = uint32_t>
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struct color {
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using type = color<ChannelType, ValueType>;
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union {
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struct {
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ChannelType red;
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ChannelType green;
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ChannelType blue;
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ChannelType alpha;
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} bits;
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ValueType value = 0U;
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} colorspace;
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explicit color(ValueType v) {
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colorspace.value = v;
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}
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};
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template <typename T>
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auto make_24bit(T&& value) {
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return color<uint8_t, uint32_t>(forward<T>(value));
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}
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template <typename T>
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auto make_32bit(T&& value) {
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return color<uint16_t, uint32_t>(forward<T>(value));
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}
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template <typename ValueType = uint32_t>
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uint8_t alpha(const color<ValueType> c) {
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return ((c.colorspace.value >> 24) << 8) | ((c.colorspace.value >> 24));
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}
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template <typename T = uint8_t, typename ValueType = uint32_t>
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T red(const color<ValueType> c) {
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uint8_t r = c.colorspace.value >> 16;
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if (std::is_same<T, uint8_t>::value)
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return r << 8 / 0xFF;
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if (std::is_same<T, uint16_t>::value)
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return r << 8 | r << 8 / 0xFF;
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}
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template <typename T = uint8_t, typename ValueType = uint32_t>
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T green(const color<ValueType> c) {
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uint8_t g = c.colorspace.value >> 8;
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if (std::is_same<T, uint8_t>::value)
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return g << 8 / 0xFF;
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if (std::is_same<T, uint16_t>::value)
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return g << 8 | g << 8 / 0xFF;
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}
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template <typename T = uint8_t, typename ValueType = uint32_t>
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T blue(const color<ValueType> c) {
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uint8_t b = c.colorspace.value;
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if (std::is_same<T, uint8_t>::value)
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return b << 8 / 0xFF;
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if (std::is_same<T, uint16_t>::value)
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return b << 8 | b << 8 / 0xFF;
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}
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string hex(const color<uint8_t, uint32_t> value) {
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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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<< (value.colorspace.value & 0x00FFFFFF));
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// clang-format on
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}
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string hex(const color<uint16_t, uint32_t> value) {
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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(8)
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<< std::setfill('0')
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<< std::hex
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<< std::uppercase
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<< value.colorspace.value);
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// clang-format on
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}
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}
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LEMONBUDDY_NS_END
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