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lvgl: Fix HSV to RGB calculation

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This commit is contained in:
CTCaer 2020-04-30 03:49:10 +03:00
parent 91b4c86bbe
commit 6749dad1a4
2 changed files with 61 additions and 32 deletions
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91
nyx/nyx_gui/libs/lvgl/lv_misc/lv_color.c
View file

@ -1,3 +1,19 @@
/*
* Copyright (c) 2019-2020 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file lv_color.c
*
@ -12,6 +28,8 @@
* DEFINES
*********************/
#define HUE_DEGREE 512
/**********************
* TYPEDEFS
**********************/
@ -43,57 +61,68 @@
* @param v value [0..100]
* @return the given RGB color in RGB (with LV_COLOR_DEPTH depth)
*/
lv_color_t lv_color_hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v)
lv_color_t lv_color_hsv_to_rgb(uint16_t hue, uint8_t sat, uint8_t val)
{
if(s == 0)
return LV_COLOR_MAKE(v, v, v);
h = (uint32_t)((uint32_t)h * 255) / 360;
s = (uint16_t)((uint16_t)s * 255) / 100;
v = (uint16_t)((uint16_t)v * 255) / 100;
uint8_t r, g, b;
uint8_t region, remainder, p, q, t;
uint32_t h = (hue * 360 * HUE_DEGREE -1) / 360;
uint32_t s = sat * 255 / 100;
uint32_t v = val * 255 / 100;
uint32_t p = (256 * v - s * v) / 256;
uint32_t region = h / (60 * 512);
if(sat == 0)
return LV_COLOR_MAKE(v, v, v);
region = h / 43;
remainder = (h - (region * 43)) * 6;
if (region & 1)
{
uint32_t q = (256 * 60 * HUE_DEGREE * v - h * s * v + 60 * HUE_DEGREE * s * v * region) /
(256 * 60 * HUE_DEGREE);
p = (v * (255 - s)) >> 8;
q = (v * (255 - ((s * remainder) >> 8))) >> 8;
t = (v * (255 - ((s * (255 - remainder)) >> 8))) >> 8;
switch(region) {
case 0:
r = v;
g = t;
b = p;
break;
switch (region)
{
case 1:
r = q;
g = v;
b = p;
break;
case 3:
r = p;
g = q;
b = v;
break;
case 5:
default:
r = v;
g = p;
b = q;
break;
}
}
else
{
uint32_t t = (256 * 60 * HUE_DEGREE * v + h * s * v - 60 * HUE_DEGREE * s * v * (region + 1)) /
(256 * 60 * HUE_DEGREE);
switch (region)
{
case 0:
r = v;
g = t;
b = p;
break;
case 2:
r = p;
g = v;
b = t;
break;
case 3:
r = p;
g = q;
b = v;
break;
case 4:
default:
r = t;
g = p;
b = v;
break;
default:
r = v;
g = p;
b = q;
break;
}
}
return LV_COLOR_MAKE(r, g, b);

2
nyx/nyx_gui/libs/lvgl/lv_misc/lv_color.h
View file

@ -432,7 +432,7 @@ static inline uint8_t lv_color_brightness(lv_color_t color)
* @param v value [0..100]
* @return the given RGB color in RGB (with LV_COLOR_DEPTH depth)
*/
lv_color_t lv_color_hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v);
lv_color_t lv_color_hsv_to_rgb(uint16_t hue, uint8_t sat, uint8_t val);
/**
* Convert an RGB color to HSV