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#include "color.hpp"
#include <algorithm>
#include <array>
#include <charconv>
#include <sstream>
#include <system_error>
#include <components/sceneutil/util.hpp>
namespace Misc
{
Color::Color(float r, float g, float b, float a)
: mValue(std::clamp(r, 0.f, 1.f), std::clamp(g, 0.f, 1.f), std::clamp(b, 0.f, 1.f), std::clamp(a, 0.f, 1.f))
{
}
std::string Color::toString() const
{
std::ostringstream ss;
ss << "(" << r() << ", " << g() << ", " << b() << ", " << a() << ')';
return ss.str();
}
Color Color::fromHex(std::string_view hex)
{
if (hex.size() != 6)
throw std::logic_error(std::string("Invalid hex color: ") += hex);
Color col;
col.mValue.a() = 1;
for (size_t i = 0; i < 3; i++)
{
auto sub = hex.substr(i * 2, 2);
int v = 0;
auto [_, ec] = std::from_chars(sub.data(), sub.data() + sub.size(), v, 16);
if (ec != std::errc())
throw std::logic_error(std::string("Invalid hex color: ") += hex);
col.mValue[i] = v / 255.0f;
}
return col;
}
Color Color::fromRGB(unsigned int value)
{
return Color(SceneUtil::colourFromRGB(value));
}
Color Color::fromVec(osg::Vec4f value)
{
return Color(std::move(value));
}
std::string Color::toHex() const
{
std::string result(6, '0');
for (size_t i = 0; i < 3; i++)
{
int b = static_cast<int>(mValue[i] * 255.0f);
char* start = result.data() + i * 2;
if (b < 16)
start++;
auto [_, ec] = std::to_chars(start, result.data() + (i + 1) * 2, b, 16);
if (ec != std::errc())
throw std::logic_error("Error when converting number to base 16");
}
return result;
}
bool operator==(const Color& l, const Color& r)
{
return l.mValue == r.mValue;
}
}
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