/*
 * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include "stdint.h"
#include "esp_log.h"
#include "screen_utility.h"

static const char *TAG = "screen utility";

void scr_utility_apply_offset(const scr_handle_t *lcd_handle, uint16_t res_hor, uint16_t res_ver, uint16_t *x0, uint16_t *y0, uint16_t *x1, uint16_t *y1)
{
    scr_dir_t dir = lcd_handle->dir;
    if (SCR_DIR_MAX < dir) {
        dir >>= 5;
    }
    uint16_t xoffset = 0, yoffset = 0;
    switch (dir) {
    case SCR_DIR_LRTB:
        xoffset = lcd_handle->offset_hor;
        yoffset = lcd_handle->offset_ver;
        break;
    case SCR_DIR_LRBT:
        xoffset = lcd_handle->offset_hor;
        yoffset = res_ver - lcd_handle->offset_ver - lcd_handle->original_height;
        break;
    case SCR_DIR_RLTB:
        xoffset += res_hor - lcd_handle->offset_hor - lcd_handle->original_width;
        yoffset += lcd_handle->offset_ver;
        break;
    case SCR_DIR_RLBT:
        xoffset = res_hor - lcd_handle->offset_hor - lcd_handle->original_width;
        yoffset = res_ver - lcd_handle->offset_ver - lcd_handle->original_height;
        break;

    case SCR_DIR_TBLR:
        xoffset = lcd_handle->offset_ver;
        yoffset = lcd_handle->offset_hor;
        break;
    case SCR_DIR_BTLR:
        yoffset = lcd_handle->offset_hor;
        xoffset = res_ver - lcd_handle->offset_ver - lcd_handle->original_height;
        break;
    case SCR_DIR_TBRL:
        yoffset += res_hor - lcd_handle->offset_hor - lcd_handle->original_width;
        xoffset += lcd_handle->offset_ver;
        break;
    case SCR_DIR_BTRL:
        yoffset = res_hor - lcd_handle->offset_hor - lcd_handle->original_width;
        xoffset = res_ver - lcd_handle->offset_ver - lcd_handle->original_height;
        break;
    default: break;
    }
    ESP_LOGD(TAG, "dir=%d, offset=(%d, %d)", dir, xoffset, yoffset);
    *x0 += xoffset;
    *x1 += xoffset;
    *y0 += yoffset;
    *y1 += yoffset;
}