rive-cpp/include/math/color.hpp

#ifndef _RIVE_COLOR_HPP_
#define _RIVE_COLOR_HPP_

#include <cstddef>

namespace rive
{
	class Color
	{
	private:
		float m_Buffer[4];

	public:
		Color() : m_Buffer{1.0f, 1.0f, 1.0f, 1.0f} {}

		Color(float r, float g, float b) : m_Buffer{r, g, b, 1.0f} {}

		Color(float r, float g, float b, float a) : m_Buffer{r, g, b, a} {}

		Color(int r, int g, int b, int a) : m_Buffer{r / 255.0f, g / 255.0f, b / 255.0f, a / 255.0f} {}

		Color(int r, int g, int b) : m_Buffer{r / 255.0f, g / 255.0f, b / 255.0f, 1.0f} {}

		Color(float rgba) : m_Buffer{rgba, rgba, rgba, rgba} {}

		inline const float* values() const { return m_Buffer; }

		float& operator[](std::size_t idx) { return m_Buffer[idx]; }
		const float& operator[](std::size_t idx) const { return m_Buffer[idx]; }
		bool operator==(const Color& b) const
		{
			return m_Buffer[0] == b[0] && m_Buffer[1] == b[1] && m_Buffer[2] == b[2] && m_Buffer[3] == b[3];
		}

		void set(float r, float g, float b, float a)
		{
			m_Buffer[0] = r;
			m_Buffer[1] = g;
			m_Buffer[2] = b;
			m_Buffer[3] = a;
		}

		void lerp(const Color& second, float amount)
		{
			float iamount = 1.0f - amount;
			for (int i = 0; i < 4; i++)
			{
				m_Buffer[i] = second.m_Buffer[i] * amount + m_Buffer[i] * iamount;
			}
		}

		void multiply(const Color& second)
		{
			for (int i = 0; i < 4; i++)
			{
				m_Buffer[i] *= second.m_Buffer[i];
			}
		}

		void copy(const Color& second)
		{
			for (int i = 0; i < 4; i++)
			{
				m_Buffer[i] = second.m_Buffer[i];
			}
		}

		void red(float r) { m_Buffer[0] = r; }
		void green(float r) { m_Buffer[1] = r; }
		void blue(float r) { m_Buffer[2] = r; }
		void alpha(float r) { m_Buffer[3] = r; }

		float red() const { return m_Buffer[0]; }
		float green() const { return m_Buffer[1]; }
		float blue() const { return m_Buffer[2]; }
		float alpha() const { return m_Buffer[3]; }

		float r() const { return m_Buffer[0]; }
		float g() const { return m_Buffer[1]; }
		float b() const { return m_Buffer[2]; }
		float a() const { return m_Buffer[3]; }
	};
} // namespace rive
#endif