Added rainbow color palette

1 files changed, 114 insertions, 0 deletions

diff --git a/src/color.c b/src/color.c
new file mode 100644
index 0000000..7fabc9c
--- /dev/null
+++ b/src/color.c
@@ -0,0 +1,114 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   color.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: cacharle <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/02/25 14:36:12 by cacharle          #+#    #+#             */
+/*   Updated: 2020/02/25 15:23:44 by cacharle         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "fractol.h"
+
+t_color_hsl	color_rgb_to_hsl(t_color color_rgb)
+{
+	t_color_hsl	color_hsl;
+	double	h;
+	double	s;
+	double	l;
+	double	r;
+	double	g;
+	double	b;
+
+	r = color_rgb.rgb.r / 256.0;
+	g = color_rgb.rgb.g / 256.0;
+	b = color_rgb.rgb.b / 256.0;
+
+	double maxColor = ft_fmax(r, ft_fmax(g, b));
+	double minColor = ft_fmin(r, ft_fmin(g, b));
+	if (maxColor == minColor) // grey
+	{
+		h = 0.0;
+		s = 0.0;
+		l = minColor;
+	}
+	else
+	{
+		l = (maxColor + minColor) / 2.0;
+
+		if (l < 0.5)
+			s = (maxColor - minColor) / (maxColor + minColor);
+		else
+			s = (maxColor - minColor) / (2.0 - maxColor - minColor);
+
+		if (r == maxColor)
+			h = (g - b) / (maxColor - minColor);
+		else if (g == maxColor)
+			h = 2.0 + (b - r) / (maxColor - minColor);
+		else
+			h = 4.0 + (r - g) / (maxColor - minColor);
+
+		h /= 6; //to bring it to a number between 0 and 1
+		if (h < 0)
+			h++;
+	}
+	color_hsl.h = (int)(h * 256.0);
+	color_hsl.s = (int)(s * 256.0);
+	color_hsl.l = (int)(l * 256.0);
+	return (color_hsl);
+}
+
+t_color		color_hsl_to_rgb(t_color_hsl color_hsl)
+{
+	t_color	color_rgb;
+	double	h;
+	double	s;
+	double	l;
+	double	r;
+	double	g;
+	double	b;
+	double temp1, temp2, tempr, tempg, tempb;
+
+	h = color_hsl.h / 256.0;
+	s = color_hsl.s / 256.0;
+	l = color_hsl.l / 256.0;
+	if(s == 0)
+	{
+		r = l;
+		g = l;
+		b = l;
+	}
+	else
+	{
+		if (l < 0.5) temp2 = l * (1 + s);
+		else temp2 = (l + s) - (l * s);
+		temp1 = 2 * l - temp2;
+		tempr = h + 1.0 / 3.0;
+		if (tempr > 1) tempr--;
+		tempg = h;
+		tempb = h - 1.0 / 3.0;
+		if (tempb < 0) tempb++;
+
+		if (tempr < 1.0 / 6.0) r = temp1 + (temp2 - temp1) * 6.0 * tempr;
+		else if (tempr < 0.5) r = temp2;
+		else if (tempr < 2.0 / 3.0) r = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempr) * 6.0;
+		else r = temp1;
+
+		if (tempg < 1.0 / 6.0) g = temp1 + (temp2 - temp1) * 6.0 * tempg;
+		else if (tempg < 0.5) g = temp2;
+		else if (tempg < 2.0 / 3.0) g = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempg) * 6.0;
+		else g = temp1;
+
+		if(tempb < 1.0 / 6.0) b = temp1 + (temp2 - temp1) * 6.0 * tempb;
+		else if(tempb < 0.5) b = temp2;
+		else if(tempb < 2.0 / 3.0) b = temp1 + (temp2 - temp1) * ((2.0 / 3.0) - tempb) * 6.0;
+		else b = temp1;
+	}
+	color_rgb.hexcode = 0x0;
+	color_rgb.rgb.r = (int)(r * 256.0);
+	color_rgb.rgb.g = (int)(g * 256.0);
+	color_rgb.rgb.b = (int)(b * 256.0);
+	return (color_rgb);
+}