Function hd108BrightnessHeader

src/fl/chipsets/encoders/encoder_utils.h:80–94

@brief Generate HD108 per-channel gain header bytes @param brightness_8bit 8-bit brightness (0-255) - UNUSED, kept for API compatibility @param f0_out Output: first header byte @param f1_out Output: second header byte @note HD108 uses per-channel gain encoding: 5 bits each for R/G/B @note All gains set to maximum (31) for maximum precision @note Brightness control via 16-bit PWM values (applied be

/// @note Brightness control via 16-bit PWM values (applied before encoding)
/// @note Future: Per channel gain control for higher color range
inline void hd108BrightnessHeader(u8 brightness_8bit, u8* f0_out, u8* f1_out) FL_NOEXCEPT {
    (void)brightness_8bit;  // Unused - brightness applied to 16-bit values instead

    // Use maximum gain for all channels for maximum precision
    // Brightness control happens via 16-bit PWM values
    constexpr u8 r_gain = 31;
    constexpr u8 g_gain = 31;
    constexpr u8 b_gain = 31;

    // Correct HD108 per-channel encoding:
    // f0: [1][RRRRR][GG] - marker bit, 5-bit R gain, 2 MSBs of G gain
    // f1: [GGG][BBBBB]   - 3 LSBs of G gain, 5-bit B gain
    *f0_out = 0x80 | ((r_gain & 0x1F) << 2) | ((g_gain >> 3) & 0x03);
    *f1_out = ((g_gain & 0x07) << 5) | (b_gain & 0x1F);
}

/// @brief Convert RGB to LPD6803 16-bit format (1bbbbbgggggrrrrr)
/// @param r Red component (0-255)