qmk_firmware/quantum/tri_layer.h

// Copyright 2023 QMK
// SPDX-License-Identifier: GPL-2.0-or-later

#include <stdint.h>

#ifndef TRI_LAYER_LOWER_LAYER
#    define TRI_LAYER_LOWER_LAYER 1
#endif
#ifndef TRI_LAYER_UPPER_LAYER
#    define TRI_LAYER_UPPER_LAYER 2
#endif
#ifndef TRI_LAYER_ADJUST_LAYER
#    define TRI_LAYER_ADJUST_LAYER 3
#endif

/**
 * @brief Set the tri layer lower layer index
 *
 * @param layer
 */
void set_tri_layer_lower_layer(uint8_t layer);
/**
 * @brief Set the tri layer upper layer index
 *
 * @param layer
 */
void set_tri_layer_upper_layer(uint8_t layer);
/**
 * @brief Set the tri layer adjust layer index
 *
 * @param layer
 */
void set_tri_layer_adjust_layer(uint8_t layer);
/**
 * @brief Set the tri layer indices
 *
 * @param lower
 * @param upper
 * @param adjust
 */
void set_tri_layer_layers(uint8_t lower, uint8_t upper, uint8_t adjust);
/**
 * @brief Get the tri layer lower layer index
 *
 * @return uint8_t
 */
uint8_t get_tri_layer_lower_layer(void);
/**
 * @brief Get the tri layer upper layer index
 *
 * @return uint8_t
 */
uint8_t get_tri_layer_upper_layer(void);
/**
 * @brief Get the tri layer adjust layer index
 *
 * @return uint8_t
 */
uint8_t get_tri_layer_adjust_layer(void);