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Diffstat (limited to 'src/color.c')
| -rw-r--r-- | src/color.c | 114 |
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); +} |