esp-idf/components/esp_driver_isp/include/driver/isp_gamma.h

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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"
#include "driver/isp_types.h"
#include "hal/color_types.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief ISP gamma Correction configuration
*
* @note This function is allowed to be called before or after esp_isp_gamma_enable(),
* but it only takes effect until esp_isp_gamma_enable() is called
*
* @param[in] proc Processor handle
* @param[in] component One of the R/G/B components, color_component_t
* @param[in] pts Group of points that describe the desired gamma correction curve;<br>
* Passing in NULL to reset to default parameters (no correction)
*
* @return
* - ESP_OK On success
* - ESP_ERR_INVALID_ARG If the combination of arguments is invalid
*/
esp_err_t esp_isp_gamma_configure(isp_proc_handle_t proc, color_component_t component, const isp_gamma_curve_points_t *pts);
/**
* @brief Enable ISP gamma function
*
* @param[in] proc Processor handle
*
* @return
* - ESP_OK On success
* - ESP_ERR_INVALID_ARG If the combination of arguments is invalid.
*/
esp_err_t esp_isp_gamma_enable(isp_proc_handle_t proc);
/**
* @brief Disable ISP gamma function
*
* @param[in] proc Processor handle
*
* @return
* - ESP_OK On success
* - ESP_ERR_INVALID_ARG If the combination of arguments is invalid.
*/
esp_err_t esp_isp_gamma_disable(isp_proc_handle_t proc);
/**
* @brief Helper function to fill the isp_gamma_curve_points_t structure, giving the mathematical function of the desired gamma correction curve
*
* @note The raw values are sampled with equal spacing
*
* @param[in] gamma_correction_operator The desired gamma correction curve y = f(x).<br>
* x is the raw value, in [0, 256]; y is the gamma-corrected value, in [0, 256];<br>
* y can be equal to 256 only if x = 256. For any other x value, y should be always less than 256.
* @param[out] pts Pointer to the to-be-filled isp_gamma_curve_points_t structure
*
* @return
* - ESP_OK On success
* - ESP_ERR_INVALID_ARG If the combination of arguments is invalid.
*/
esp_err_t esp_isp_gamma_fill_curve_points(uint32_t (* gamma_correction_operator)(uint32_t), isp_gamma_curve_points_t *pts);
#ifdef __cplusplus
}
#endif