You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
1.9 KiB
104 lines
1.9 KiB
8 years ago
|
#include <avr/io.h>
|
||
|
|
#include <util/delay.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include "iopins.h"
|
||
|
|
#include "nsdelay.h"
|
||
|
|
#include "color.h"
|
||
|
|
|
||
|
|
|
||
|
|
// --- HSL ---
|
||
|
|
|
||
|
|
#ifdef HSL_LINEAR
|
||
|
|
const uint8_t FADE_128[] =
|
||
|
|
{
|
||
|
|
0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4,
|
||
|
|
5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 9, 10, 10, 10, 11, 12, 13, 14,
|
||
|
|
14, 15, 16, 17, 18, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 34, 35, 36,
|
||
|
|
38, 39, 40, 41, 42, 44, 45, 46, 48, 49, 50, 52, 54, 56, 58, 59, 61, 63,
|
||
|
|
65, 67, 68, 69, 71, 72, 74, 76, 78, 80, 82, 85, 88, 90, 92, 95, 98, 100,
|
||
|
|
103, 106, 109, 112, 116, 119, 122, 125, 129, 134, 138, 142, 147, 151,
|
||
|
|
153, 156, 160, 163, 165, 170, 175, 180, 185, 190, 195, 200, 207, 214, 218,
|
||
|
|
221, 225, 228, 232, 234, 241, 248, 254, 255
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// based on: https://github.com/lewisd32/avr-hsl2rgb
|
||
|
|
xrgb_t hsl_xrgb(const hsl_t cc)
|
||
|
|
{
|
||
|
|
// 0 .. 256*3
|
||
|
|
const uint16_t hh = (uint16_t) cc.h * 3;
|
||
|
|
const uint8_t hue_mod = hh % 256;
|
||
|
|
|
||
|
|
uint8_t r_temp, g_temp, b_temp;
|
||
|
|
if (hh < 256)
|
||
|
|
{
|
||
|
|
r_temp = hue_mod ^ 255;
|
||
|
|
g_temp = hue_mod;
|
||
|
|
b_temp = 0;
|
||
|
|
}
|
||
|
|
else if (hh < 512)
|
||
|
|
{
|
||
|
|
r_temp = 0;
|
||
|
|
g_temp = hue_mod ^ 255;
|
||
|
|
b_temp = hue_mod;
|
||
|
|
}
|
||
|
|
else if (hh < 768)
|
||
|
|
{
|
||
|
|
r_temp = hue_mod;
|
||
|
|
g_temp = 0;
|
||
|
|
b_temp = hue_mod ^ 255;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
r_temp = 0;
|
||
|
|
g_temp = 0;
|
||
|
|
b_temp = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const uint8_t inverse_sat = (cc.s ^ 255);
|
||
|
|
|
||
|
|
xrgb_t rgb;
|
||
|
|
|
||
|
|
uint8_t t8;
|
||
|
|
uint16_t t16;
|
||
|
|
|
||
|
|
#ifdef HSL_LINEAR
|
||
|
|
const uint8_t bri = FADE_128[cc.l >> 1];
|
||
|
|
#else
|
||
|
|
const uint8_t bri = cc.l;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
t8 = r_temp;
|
||
|
|
t16 = t8 * cc.s + t8;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
t8 = t8 + inverse_sat;
|
||
|
|
t16 = t8 * bri;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
rgb.r = t8;
|
||
|
|
|
||
|
|
t8 = g_temp;
|
||
|
|
t16 = t8 * cc.s;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
t8 = t8 + inverse_sat;
|
||
|
|
t16 = t8 * bri;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
rgb.g = t8;
|
||
|
|
|
||
|
|
t8 = b_temp;
|
||
|
|
t16 = t8 * cc.s;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
t8 = t8 + inverse_sat;
|
||
|
|
t16 = t8 * bri;
|
||
|
|
t16 = t16 + t8;
|
||
|
|
t8 = t16 >> 8;
|
||
|
|
rgb.b = t8;
|
||
|
|
|
||
|
|
return rgb;
|
||
|
|
}
|