kopia lustrzana https://github.com/Aircoookie/WLED
502 wiersze
17 KiB
C++
502 wiersze
17 KiB
C++
#include "wled.h"
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/*
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* Color conversion & utility methods
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*/
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/*
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* color blend function
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*/
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uint32_t color_blend(uint32_t color1, uint32_t color2, uint16_t blend, bool b16) {
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if (blend == 0) return color1;
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unsigned blendmax = b16 ? 0xFFFF : 0xFF;
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if (blend == blendmax) return color2;
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unsigned shift = b16 ? 16 : 8;
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uint32_t w1 = W(color1);
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uint32_t r1 = R(color1);
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uint32_t g1 = G(color1);
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uint32_t b1 = B(color1);
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uint32_t w2 = W(color2);
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uint32_t r2 = R(color2);
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uint32_t g2 = G(color2);
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uint32_t b2 = B(color2);
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uint32_t w3 = ((w2 * blend) + (w1 * (blendmax - blend))) >> shift;
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uint32_t r3 = ((r2 * blend) + (r1 * (blendmax - blend))) >> shift;
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uint32_t g3 = ((g2 * blend) + (g1 * (blendmax - blend))) >> shift;
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uint32_t b3 = ((b2 * blend) + (b1 * (blendmax - blend))) >> shift;
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return RGBW32(r3, g3, b3, w3);
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}
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/*
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* color add function that preserves ratio
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* idea: https://github.com/Aircoookie/WLED/pull/2465 by https://github.com/Proto-molecule
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*/
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uint32_t color_add(uint32_t c1, uint32_t c2, bool fast)
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{
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if (c1 == BLACK) return c2;
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if (c2 == BLACK) return c1;
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if (fast) {
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uint8_t r = R(c1);
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uint8_t g = G(c1);
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uint8_t b = B(c1);
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uint8_t w = W(c1);
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r = qadd8(r, R(c2));
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g = qadd8(g, G(c2));
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b = qadd8(b, B(c2));
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w = qadd8(w, W(c2));
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return RGBW32(r,g,b,w);
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} else {
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uint32_t r = R(c1) + R(c2);
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uint32_t g = G(c1) + G(c2);
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uint32_t b = B(c1) + B(c2);
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uint32_t w = W(c1) + W(c2);
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unsigned max = r;
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if (g > max) max = g;
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if (b > max) max = b;
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if (w > max) max = w;
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if (max < 256) return RGBW32(r, g, b, w);
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else return RGBW32(r * 255 / max, g * 255 / max, b * 255 / max, w * 255 / max);
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}
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}
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/*
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* fades color toward black
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* if using "video" method the resulting color will never become black unless it is already black
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*/
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uint32_t color_fade(uint32_t c1, uint8_t amount, bool video)
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{
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if (c1 == BLACK || amount + video == 0) return BLACK;
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uint32_t scaledcolor; // color order is: W R G B from MSB to LSB
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uint32_t r = R(c1);
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uint32_t g = G(c1);
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uint32_t b = B(c1);
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uint32_t w = W(c1);
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uint32_t scale = amount; // 32bit for faster calculation
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if (video) {
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scaledcolor = (((r * scale) >> 8) + ((r && scale) ? 1 : 0)) << 16;
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scaledcolor |= (((g * scale) >> 8) + ((g && scale) ? 1 : 0)) << 8;
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scaledcolor |= ((b * scale) >> 8) + ((b && scale) ? 1 : 0);
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scaledcolor |= (((w * scale) >> 8) + ((w && scale) ? 1 : 0)) << 24;
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} else {
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scaledcolor = ((r * scale) >> 8) << 16;
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scaledcolor |= ((g * scale) >> 8) << 8;
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scaledcolor |= (b * scale) >> 8;
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scaledcolor |= ((w * scale) >> 8) << 24;
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}
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return scaledcolor;
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}
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void setRandomColor(byte* rgb)
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{
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lastRandomIndex = get_random_wheel_index(lastRandomIndex);
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colorHStoRGB(lastRandomIndex*256,255,rgb);
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}
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/*
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* generates a random palette based on harmonic color theory
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* takes a base palette as the input, it will choose one color of the base palette and keep it
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*/
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CRGBPalette16 generateHarmonicRandomPalette(CRGBPalette16 &basepalette)
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{
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CHSV palettecolors[4]; //array of colors for the new palette
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uint8_t keepcolorposition = random8(4); //color position of current random palette to keep
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palettecolors[keepcolorposition] = rgb2hsv_approximate(basepalette.entries[keepcolorposition*5]); //read one of the base colors of the current palette
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palettecolors[keepcolorposition].hue += random8(10)-5; // +/- 5 randomness of base color
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//generate 4 saturation and brightness value numbers
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//only one saturation is allowed to be below 200 creating mostly vibrant colors
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//only one brightness value number is allowed below 200, creating mostly bright palettes
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for (int i = 0; i < 3; i++) { //generate three high values
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palettecolors[i].saturation = random8(200,255);
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palettecolors[i].value = random8(220,255);
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}
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//allow one to be lower
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palettecolors[3].saturation = random8(20,255);
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palettecolors[3].value = random8(80,255);
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//shuffle the arrays
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for (int i = 3; i > 0; i--) {
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std::swap(palettecolors[i].saturation, palettecolors[random8(i + 1)].saturation);
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std::swap(palettecolors[i].value, palettecolors[random8(i + 1)].value);
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}
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//now generate three new hues based off of the hue of the chosen current color
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uint8_t basehue = palettecolors[keepcolorposition].hue;
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uint8_t harmonics[3]; //hues that are harmonic but still a little random
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uint8_t type = random8(5); //choose a harmony type
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switch (type) {
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case 0: // analogous
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harmonics[0] = basehue + random8(30, 50);
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harmonics[1] = basehue + random8(10, 30);
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harmonics[2] = basehue - random8(10, 30);
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break;
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case 1: // triadic
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harmonics[0] = basehue + 113 + random8(15);
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harmonics[1] = basehue + 233 + random8(15);
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harmonics[2] = basehue - 7 + random8(15);
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break;
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case 2: // split-complementary
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harmonics[0] = basehue + 145 + random8(10);
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harmonics[1] = basehue + 205 + random8(10);
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harmonics[2] = basehue - 5 + random8(10);
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break;
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case 3: // square
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harmonics[0] = basehue + 85 + random8(10);
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harmonics[1] = basehue + 175 + random8(10);
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harmonics[2] = basehue + 265 + random8(10);
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break;
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case 4: // tetradic
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harmonics[0] = basehue + 80 + random8(20);
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harmonics[1] = basehue + 170 + random8(20);
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harmonics[2] = basehue - 15 + random8(30);
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break;
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}
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if (random8() < 128) {
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//50:50 chance of shuffling hues or keep the color order
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for (int i = 2; i > 0; i--) {
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std::swap(harmonics[i], harmonics[random8(i + 1)]);
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}
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}
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//now set the hues
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int j = 0;
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for (int i = 0; i < 4; i++) {
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if (i==keepcolorposition) continue; //skip the base color
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palettecolors[i].hue = harmonics[j];
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j++;
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}
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bool makepastelpalette = false;
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if (random8() < 25) { //~10% chance of desaturated 'pastel' colors
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makepastelpalette = true;
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}
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//apply saturation & gamma correction
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CRGB RGBpalettecolors[4];
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for (int i = 0; i < 4; i++) {
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if (makepastelpalette && palettecolors[i].saturation > 180) {
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palettecolors[i].saturation -= 160; //desaturate all four colors
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}
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RGBpalettecolors[i] = (CRGB)palettecolors[i]; //convert to RGB
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RGBpalettecolors[i] = gamma32(((uint32_t)RGBpalettecolors[i]) & 0x00FFFFFFU); //strip alpha from CRGB
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}
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return CRGBPalette16(RGBpalettecolors[0],
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RGBpalettecolors[1],
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RGBpalettecolors[2],
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RGBpalettecolors[3]);
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}
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CRGBPalette16 generateRandomPalette() //generate fully random palette
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{
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return CRGBPalette16(CHSV(random8(), random8(160, 255), random8(128, 255)),
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CHSV(random8(), random8(160, 255), random8(128, 255)),
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CHSV(random8(), random8(160, 255), random8(128, 255)),
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CHSV(random8(), random8(160, 255), random8(128, 255)));
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}
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void colorHStoRGB(uint16_t hue, byte sat, byte* rgb) //hue, sat to rgb
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{
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float h = ((float)hue)/10922.5f; // hue*6/65535
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float s = ((float)sat)/255.0f;
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int i = int(h);
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float f = h - i;
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int p = int(255.0f * (1.0f-s));
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int q = int(255.0f * (1.0f-s*f));
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int t = int(255.0f * (1.0f-s*(1.0f-f)));
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p = constrain(p, 0, 255);
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q = constrain(q, 0, 255);
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t = constrain(t, 0, 255);
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switch (i%6) {
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case 0: rgb[0]=255,rgb[1]=t, rgb[2]=p; break;
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case 1: rgb[0]=q, rgb[1]=255,rgb[2]=p; break;
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case 2: rgb[0]=p, rgb[1]=255,rgb[2]=t; break;
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case 3: rgb[0]=p, rgb[1]=q, rgb[2]=255;break;
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case 4: rgb[0]=t, rgb[1]=p, rgb[2]=255;break;
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case 5: rgb[0]=255,rgb[1]=p, rgb[2]=q; break;
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}
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}
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//get RGB values from color temperature in K (https://tannerhelland.com/2012/09/18/convert-temperature-rgb-algorithm-code.html)
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void colorKtoRGB(uint16_t kelvin, byte* rgb) //white spectrum to rgb, calc
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{
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int r = 0, g = 0, b = 0;
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float temp = kelvin / 100.0f;
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if (temp <= 66.0f) {
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r = 255;
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g = roundf(99.4708025861f * logf(temp) - 161.1195681661f);
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if (temp <= 19.0f) {
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b = 0;
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} else {
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b = roundf(138.5177312231f * logf((temp - 10.0f)) - 305.0447927307f);
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}
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} else {
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r = roundf(329.698727446f * powf((temp - 60.0f), -0.1332047592f));
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g = roundf(288.1221695283f * powf((temp - 60.0f), -0.0755148492f));
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b = 255;
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}
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//g += 12; //mod by Aircoookie, a bit less accurate but visibly less pinkish
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rgb[0] = (uint8_t) constrain(r, 0, 255);
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rgb[1] = (uint8_t) constrain(g, 0, 255);
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rgb[2] = (uint8_t) constrain(b, 0, 255);
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rgb[3] = 0;
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}
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void colorCTtoRGB(uint16_t mired, byte* rgb) //white spectrum to rgb, bins
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{
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//this is only an approximation using WS2812B with gamma correction enabled
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if (mired > 475) {
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rgb[0]=255;rgb[1]=199;rgb[2]=92;//500
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} else if (mired > 425) {
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rgb[0]=255;rgb[1]=213;rgb[2]=118;//450
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} else if (mired > 375) {
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rgb[0]=255;rgb[1]=216;rgb[2]=118;//400
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} else if (mired > 325) {
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rgb[0]=255;rgb[1]=234;rgb[2]=140;//350
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} else if (mired > 275) {
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rgb[0]=255;rgb[1]=243;rgb[2]=160;//300
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} else if (mired > 225) {
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rgb[0]=250;rgb[1]=255;rgb[2]=188;//250
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} else if (mired > 175) {
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rgb[0]=247;rgb[1]=255;rgb[2]=215;//200
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} else {
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rgb[0]=237;rgb[1]=255;rgb[2]=239;//150
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}
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}
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#ifndef WLED_DISABLE_HUESYNC
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void colorXYtoRGB(float x, float y, byte* rgb) //coordinates to rgb (https://www.developers.meethue.com/documentation/color-conversions-rgb-xy)
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{
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float z = 1.0f - x - y;
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float X = (1.0f / y) * x;
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float Z = (1.0f / y) * z;
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float r = (int)255*(X * 1.656492f - 0.354851f - Z * 0.255038f);
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float g = (int)255*(-X * 0.707196f + 1.655397f + Z * 0.036152f);
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float b = (int)255*(X * 0.051713f - 0.121364f + Z * 1.011530f);
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if (r > b && r > g && r > 1.0f) {
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// red is too big
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g = g / r;
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b = b / r;
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r = 1.0f;
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} else if (g > b && g > r && g > 1.0f) {
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// green is too big
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r = r / g;
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b = b / g;
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g = 1.0f;
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} else if (b > r && b > g && b > 1.0f) {
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// blue is too big
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r = r / b;
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g = g / b;
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b = 1.0f;
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}
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// Apply gamma correction
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r = r <= 0.0031308f ? 12.92f * r : (1.0f + 0.055f) * powf(r, (1.0f / 2.4f)) - 0.055f;
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g = g <= 0.0031308f ? 12.92f * g : (1.0f + 0.055f) * powf(g, (1.0f / 2.4f)) - 0.055f;
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b = b <= 0.0031308f ? 12.92f * b : (1.0f + 0.055f) * powf(b, (1.0f / 2.4f)) - 0.055f;
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if (r > b && r > g) {
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// red is biggest
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if (r > 1.0f) {
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g = g / r;
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b = b / r;
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r = 1.0f;
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}
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} else if (g > b && g > r) {
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// green is biggest
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if (g > 1.0f) {
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r = r / g;
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b = b / g;
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g = 1.0f;
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}
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} else if (b > r && b > g) {
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// blue is biggest
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if (b > 1.0f) {
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r = r / b;
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g = g / b;
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b = 1.0f;
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}
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}
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rgb[0] = byte(255.0f*r);
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rgb[1] = byte(255.0f*g);
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rgb[2] = byte(255.0f*b);
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}
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void colorRGBtoXY(byte* rgb, float* xy) //rgb to coordinates (https://www.developers.meethue.com/documentation/color-conversions-rgb-xy)
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{
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float X = rgb[0] * 0.664511f + rgb[1] * 0.154324f + rgb[2] * 0.162028f;
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float Y = rgb[0] * 0.283881f + rgb[1] * 0.668433f + rgb[2] * 0.047685f;
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float Z = rgb[0] * 0.000088f + rgb[1] * 0.072310f + rgb[2] * 0.986039f;
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xy[0] = X / (X + Y + Z);
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xy[1] = Y / (X + Y + Z);
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}
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#endif // WLED_DISABLE_HUESYNC
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//RRGGBB / WWRRGGBB order for hex
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void colorFromDecOrHexString(byte* rgb, char* in)
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{
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if (in[0] == 0) return;
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char first = in[0];
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uint32_t c = 0;
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if (first == '#' || first == 'h' || first == 'H') //is HEX encoded
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{
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c = strtoul(in +1, NULL, 16);
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} else
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{
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c = strtoul(in, NULL, 10);
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}
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rgb[0] = R(c);
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rgb[1] = G(c);
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rgb[2] = B(c);
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rgb[3] = W(c);
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}
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//contrary to the colorFromDecOrHexString() function, this uses the more standard RRGGBB / RRGGBBWW order
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bool colorFromHexString(byte* rgb, const char* in) {
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if (in == nullptr) return false;
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size_t inputSize = strnlen(in, 9);
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if (inputSize != 6 && inputSize != 8) return false;
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uint32_t c = strtoul(in, NULL, 16);
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if (inputSize == 6) {
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rgb[0] = (c >> 16);
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rgb[1] = (c >> 8);
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rgb[2] = c ;
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} else {
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rgb[0] = (c >> 24);
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rgb[1] = (c >> 16);
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rgb[2] = (c >> 8);
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rgb[3] = c ;
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}
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return true;
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}
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static inline float minf(float v, float w)
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{
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if (w > v) return v;
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return w;
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}
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static inline float maxf(float v, float w)
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{
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if (w > v) return w;
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return v;
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}
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// adjust RGB values based on color temperature in K (range [2800-10200]) (https://en.wikipedia.org/wiki/Color_balance)
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// called from bus manager when color correction is enabled!
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uint32_t colorBalanceFromKelvin(uint16_t kelvin, uint32_t rgb)
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{
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//remember so that slow colorKtoRGB() doesn't have to run for every setPixelColor()
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static byte correctionRGB[4] = {0,0,0,0};
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static uint16_t lastKelvin = 0;
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if (lastKelvin != kelvin) colorKtoRGB(kelvin, correctionRGB); // convert Kelvin to RGB
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lastKelvin = kelvin;
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byte rgbw[4];
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rgbw[0] = ((uint16_t) correctionRGB[0] * R(rgb)) /255; // correct R
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rgbw[1] = ((uint16_t) correctionRGB[1] * G(rgb)) /255; // correct G
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rgbw[2] = ((uint16_t) correctionRGB[2] * B(rgb)) /255; // correct B
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rgbw[3] = W(rgb);
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return RGBW32(rgbw[0],rgbw[1],rgbw[2],rgbw[3]);
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}
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//approximates a Kelvin color temperature from an RGB color.
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//this does no check for the "whiteness" of the color,
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//so should be used combined with a saturation check (as done by auto-white)
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//values from http://www.vendian.org/mncharity/dir3/blackbody/UnstableURLs/bbr_color.html (10deg)
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//equation spreadsheet at https://bit.ly/30RkHaN
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//accuracy +-50K from 1900K up to 8000K
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//minimum returned: 1900K, maximum returned: 10091K (range of 8192)
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uint16_t approximateKelvinFromRGB(uint32_t rgb) {
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//if not either red or blue is 255, color is dimmed. Scale up
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uint8_t r = R(rgb), b = B(rgb);
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if (r == b) return 6550; //red == blue at about 6600K (also can't go further if both R and B are 0)
|
|
|
|
if (r > b) {
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//scale blue up as if red was at 255
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uint16_t scale = 0xFFFF / r; //get scale factor (range 257-65535)
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|
b = ((uint16_t)b * scale) >> 8;
|
|
//For all temps K<6600 R is bigger than B (for full bri colors R=255)
|
|
//-> Use 9 linear approximations for blackbody radiation blue values from 2000-6600K (blue is always 0 below 2000K)
|
|
if (b < 33) return 1900 + b *6;
|
|
if (b < 72) return 2100 + (b-33) *10;
|
|
if (b < 101) return 2492 + (b-72) *14;
|
|
if (b < 132) return 2900 + (b-101) *16;
|
|
if (b < 159) return 3398 + (b-132) *19;
|
|
if (b < 186) return 3906 + (b-159) *22;
|
|
if (b < 210) return 4500 + (b-186) *25;
|
|
if (b < 230) return 5100 + (b-210) *30;
|
|
return 5700 + (b-230) *34;
|
|
} else {
|
|
//scale red up as if blue was at 255
|
|
uint16_t scale = 0xFFFF / b; //get scale factor (range 257-65535)
|
|
r = ((uint16_t)r * scale) >> 8;
|
|
//For all temps K>6600 B is bigger than R (for full bri colors B=255)
|
|
//-> Use 2 linear approximations for blackbody radiation red values from 6600-10091K (blue is always 0 below 2000K)
|
|
if (r > 225) return 6600 + (254-r) *50;
|
|
uint16_t k = 8080 + (225-r) *86;
|
|
return (k > 10091) ? 10091 : k;
|
|
}
|
|
}
|
|
|
|
//gamma 2.8 lookup table used for color correction
|
|
uint8_t NeoGammaWLEDMethod::gammaT[256] = {
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1,
|
|
1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2,
|
|
2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 5, 5, 5,
|
|
5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10,
|
|
10, 10, 11, 11, 11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16,
|
|
17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 24, 24, 25,
|
|
25, 26, 27, 27, 28, 29, 29, 30, 31, 32, 32, 33, 34, 35, 35, 36,
|
|
37, 38, 39, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 50,
|
|
51, 52, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68,
|
|
69, 70, 72, 73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
|
|
90, 92, 93, 95, 96, 98, 99,101,102,104,105,107,109,110,112,114,
|
|
115,117,119,120,122,124,126,127,129,131,133,135,137,138,140,142,
|
|
144,146,148,150,152,154,156,158,160,162,164,167,169,171,173,175,
|
|
177,180,182,184,186,189,191,193,196,198,200,203,205,208,210,213,
|
|
215,218,220,223,225,228,231,233,236,239,241,244,247,249,252,255 };
|
|
|
|
// re-calculates & fills gamma table
|
|
void NeoGammaWLEDMethod::calcGammaTable(float gamma)
|
|
{
|
|
for (size_t i = 0; i < 256; i++) {
|
|
gammaT[i] = (int)(powf((float)i / 255.0f, gamma) * 255.0f + 0.5f);
|
|
}
|
|
}
|
|
|
|
uint8_t IRAM_ATTR_YN NeoGammaWLEDMethod::Correct(uint8_t value)
|
|
{
|
|
if (!gammaCorrectCol) return value;
|
|
return gammaT[value];
|
|
}
|
|
|
|
// used for color gamma correction
|
|
uint32_t IRAM_ATTR_YN NeoGammaWLEDMethod::Correct32(uint32_t color)
|
|
{
|
|
if (!gammaCorrectCol) return color;
|
|
uint8_t w = W(color);
|
|
uint8_t r = R(color);
|
|
uint8_t g = G(color);
|
|
uint8_t b = B(color);
|
|
w = gammaT[w];
|
|
r = gammaT[r];
|
|
g = gammaT[g];
|
|
b = gammaT[b];
|
|
return RGBW32(r, g, b, w);
|
|
}
|