rgbw.h

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#pragma once
 
#include <stdint.h>
 
#include "fl/force_inline.h"
#include "fl/namespace.h"
#include "eorder.h"
 
FASTLED_NAMESPACE_BEGIN
 
 
enum RGBW_MODE {
    kRGBWInvalid,
    kRGBWNullWhitePixel,
    kRGBWExactColors,
    kRGBWBoostedWhite,
    kRGBWMaxBrightness,
    kRGBWUserFunction
};
 
enum {
    kRGBWDefaultColorTemp = 6000,
};
 
struct Rgbw {
    explicit Rgbw(uint16_t white_color_temp = kRGBWDefaultColorTemp,
                  RGBW_MODE rgbw_mode = kRGBWExactColors,
                  EOrderW _w_placement = WDefault)
        : white_color_temp(white_color_temp), w_placement(_w_placement),
          rgbw_mode(rgbw_mode) {}
    uint16_t white_color_temp = kRGBWDefaultColorTemp;
    EOrderW w_placement = WDefault;
    RGBW_MODE rgbw_mode = kRGBWExactColors;
    FASTLED_FORCE_INLINE bool active() const {
        return rgbw_mode != kRGBWInvalid;
    }
 
    static uint32_t size_as_rgb(uint32_t num_of_rgbw_pixels) {
        // The ObjectFLED controller expects the raw pixel byte data in multiples of 3.
        // In the case of src data not a multiple of 3, then we need to
        // add pad bytes so that the delegate controller doesn't walk off the end
        // of the array and invoke a buffer overflow panic.
        num_of_rgbw_pixels = (num_of_rgbw_pixels * 4 + 2) / 3;
        uint32_t extra = num_of_rgbw_pixels % 3 ? 1 : 0;
        num_of_rgbw_pixels += extra;
        return num_of_rgbw_pixels;
    }
};
 
struct RgbwInvalid : public Rgbw {
    RgbwInvalid() {
        white_color_temp = kRGBWDefaultColorTemp;
        rgbw_mode = kRGBWInvalid;
    }
    static Rgbw value() {
        RgbwInvalid invalid;
        return invalid;
    }
};
 
struct RgbwDefault : public Rgbw {
    RgbwDefault() {
        white_color_temp = kRGBWDefaultColorTemp;
        rgbw_mode = kRGBWExactColors;
    }
    static Rgbw value() {
        RgbwDefault _default;
        return _default;
    }
};
 
struct RgbwWhiteIsOff : public Rgbw {
    RgbwWhiteIsOff() {
        white_color_temp = kRGBWDefaultColorTemp;
        rgbw_mode = kRGBWNullWhitePixel;
    }
    static Rgbw value() {
        RgbwWhiteIsOff _default;
        return _default;
    }
};
 
typedef void (*rgb_2_rgbw_function)(uint16_t w_color_temperature, uint8_t r,
                                    uint8_t g, uint8_t b, uint8_t r_scale,
                                    uint8_t g_scale, uint8_t b_scale,
                                    uint8_t *out_r, uint8_t *out_g,
                                    uint8_t *out_b, uint8_t *out_w);
 
void rgb_2_rgbw_exact(uint16_t w_color_temperature, uint8_t r, uint8_t g,
                      uint8_t b, uint8_t r_scale, uint8_t g_scale,
                      uint8_t b_scale, uint8_t *out_r, uint8_t *out_g,
                      uint8_t *out_b, uint8_t *out_w);
 
void rgb_2_rgbw_max_brightness(uint16_t w_color_temperature, uint8_t r,
                               uint8_t g, uint8_t b, uint8_t r_scale,
                               uint8_t g_scale, uint8_t b_scale, uint8_t *out_r,
                               uint8_t *out_g, uint8_t *out_b, uint8_t *out_w);
 
void rgb_2_rgbw_null_white_pixel(uint16_t w_color_temperature, uint8_t r,
                                 uint8_t g, uint8_t b, uint8_t r_scale,
                                 uint8_t g_scale, uint8_t b_scale,
                                 uint8_t *out_r, uint8_t *out_g, uint8_t *out_b,
                                 uint8_t *out_w);
 
void rgb_2_rgbw_white_boosted(uint16_t w_color_temperature, uint8_t r,
                              uint8_t g, uint8_t b, uint8_t r_scale,
                              uint8_t g_scale, uint8_t b_scale, uint8_t *out_r,
                              uint8_t *out_g, uint8_t *out_b, uint8_t *out_w);
 
void rgb_2_rgbw_user_function(uint16_t w_color_temperature, uint8_t r,
                              uint8_t g, uint8_t b, uint8_t r_scale,
                              uint8_t g_scale, uint8_t b_scale, uint8_t *out_r,
                              uint8_t *out_g, uint8_t *out_b, uint8_t *out_w);
 
void set_rgb_2_rgbw_function(rgb_2_rgbw_function func);
 
FASTLED_FORCE_INLINE void rgb_2_rgbw(
    RGBW_MODE mode, uint16_t w_color_temperature, uint8_t r, uint8_t g,
    uint8_t b, uint8_t r_scale, uint8_t g_scale, uint8_t b_scale,
    uint8_t *out_r, uint8_t *out_g, uint8_t *out_b, uint8_t *out_w) {
    switch (mode) {
    case kRGBWInvalid:
    case kRGBWNullWhitePixel:
        rgb_2_rgbw_null_white_pixel(w_color_temperature, r, g, b, r_scale,
                                    g_scale, b_scale, out_r, out_g, out_b,
                                    out_w);
        return;
    case kRGBWExactColors:
        rgb_2_rgbw_exact(w_color_temperature, r, g, b, r_scale, g_scale,
                         b_scale, out_r, out_g, out_b, out_w);
        return;
    case kRGBWBoostedWhite:
        rgb_2_rgbw_white_boosted(w_color_temperature, r, g, b, r_scale, g_scale,
                                 b_scale, out_r, out_g, out_b, out_w);
        return;
    case kRGBWMaxBrightness:
        rgb_2_rgbw_max_brightness(w_color_temperature, r, g, b, r_scale,
                                  g_scale, b_scale, out_r, out_g, out_b, out_w);
        return;
    case kRGBWUserFunction:
        rgb_2_rgbw_user_function(w_color_temperature, r, g, b, r_scale, g_scale,
                                 b_scale, out_r, out_g, out_b, out_w);
        return;
    }
    rgb_2_rgbw_null_white_pixel(w_color_temperature, r, g, b, r_scale, g_scale,
                                b_scale, out_r, out_g, out_b, out_w);
}
 
// @brief Converts RGB to RGBW using one of the functions.
template <RGBW_MODE MODE>
FASTLED_FORCE_INLINE void
rgb_2_rgbw(uint16_t w_color_temperature, uint8_t r, uint8_t g, uint8_t b,
           uint8_t r_scale, uint8_t g_scale, uint8_t b_scale, uint8_t *out_r,
           uint8_t *out_g, uint8_t *out_b, uint8_t *out_w) {
    // We trust that the compiler will inline all of this.
    rgb_2_rgbw(MODE, w_color_temperature, r, g, b, r_scale, g_scale, b_scale,
               out_r, out_g, out_b, out_w);
}
 
// Assuming all RGB pixels are already ordered in native led ordering, then this
// function will reorder them so that white is also the correct position.
// b0-b2 are actually rgb that are already in native LED order.
// and out_b0-out_b3 are the output RGBW in native LED chipset order.
// w is the white component that needs to be inserted into the RGB data at
// the correct position.
void rgbw_partial_reorder(EOrderW w_placement, uint8_t b0, uint8_t b1,
                          uint8_t b2, uint8_t w, uint8_t *out_b0,
                          uint8_t *out_b1, uint8_t *out_b2, uint8_t *out_b3);
 
 
FASTLED_NAMESPACE_END