mirror of
https://github.com/shchmue/Lockpick_RCM.git
synced 2024-06-26 20:26:06 +02:00
168 lines
3.6 KiB
C
168 lines
3.6 KiB
C
/*
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* Copyright (c) 2019-2020 CTCaer
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file lv_color.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_color.h"
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/*********************
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* DEFINES
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*********************/
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#define HUE_DEGREE 512
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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/**********************
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* STATIC VARIABLES
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**********************/
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Convert a HSV color to RGB
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* @param h hue [0..359]
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* @param s saturation [0..100]
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* @param v value [0..100]
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* @return the given RGB color in RGB (with LV_COLOR_DEPTH depth)
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*/
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lv_color_t lv_color_hsv_to_rgb(uint16_t hue, uint8_t sat, uint8_t val)
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{
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uint8_t r, g, b;
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uint32_t h = (hue * 360 * HUE_DEGREE -1) / 360;
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uint32_t s = sat * 255 / 100;
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uint32_t v = val * 255 / 100;
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uint32_t p = (256 * v - s * v) / 256;
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uint32_t region = h / (60 * 512);
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if(sat == 0)
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return LV_COLOR_MAKE(v, v, v);
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if (region & 1)
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{
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uint32_t q = (256 * 60 * HUE_DEGREE * v - h * s * v + 60 * HUE_DEGREE * s * v * region) /
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(256 * 60 * HUE_DEGREE);
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switch (region)
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{
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case 1:
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r = q;
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g = v;
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b = p;
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break;
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case 3:
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r = p;
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g = q;
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b = v;
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break;
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case 5:
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default:
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r = v;
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g = p;
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b = q;
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break;
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}
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}
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else
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{
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uint32_t t = (256 * 60 * HUE_DEGREE * v + h * s * v - 60 * HUE_DEGREE * s * v * (region + 1)) /
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(256 * 60 * HUE_DEGREE);
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switch (region)
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{
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case 0:
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r = v;
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g = t;
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b = p;
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break;
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case 2:
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r = p;
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g = v;
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b = t;
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break;
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case 4:
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default:
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r = t;
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g = p;
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b = v;
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break;
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}
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}
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return LV_COLOR_MAKE(r, g, b);
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}
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/**
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* Convert an RGB color to HSV
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* @param r red
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* @param g green
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* @param b blue
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* @return the given RGB color n HSV
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*/
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lv_color_hsv_t lv_color_rgb_to_hsv(uint8_t r, uint8_t g, uint8_t b)
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{
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lv_color_hsv_t hsv;
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uint8_t rgbMin, rgbMax;
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rgbMin = r < g ? (r < b ? r : b) : (g < b ? g : b);
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rgbMax = r > g ? (r > b ? r : b) : (g > b ? g : b);
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hsv.v = rgbMax;
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if(hsv.v == 0) {
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hsv.h = 0;
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hsv.s = 0;
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return hsv;
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}
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hsv.s = 255 * (long)(rgbMax - rgbMin) / hsv.v;
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if(hsv.s == 0) {
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hsv.h = 0;
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return hsv;
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}
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if(rgbMax == r)
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hsv.h = 0 + 43 * (g - b) / (rgbMax - rgbMin);
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else if(rgbMax == g)
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hsv.h = 85 + 43 * (b - r) / (rgbMax - rgbMin);
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else
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hsv.h = 171 + 43 * (r - g) / (rgbMax - rgbMin);
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return hsv;
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}
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