esp-idf/examples/common_components/qrcode/esp_qrcode_main.c

122 wiersze
3.5 KiB
C

// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <esp_err.h>
#include "esp_log.h"
#include "qrcodegen.h"
#include "qrcode.h"
static const char *TAG = "QRCODE";
static const char *lt[] = {
/* 0 */ " ",
/* 1 */ "\u2580 ",
/* 2 */ " \u2580",
/* 3 */ "\u2580\u2580",
/* 4 */ "\u2584 ",
/* 5 */ "\u2588 ",
/* 6 */ "\u2584\u2580",
/* 7 */ "\u2588\u2580",
/* 8 */ " \u2584",
/* 9 */ "\u2580\u2584",
/* 10 */ " \u2588",
/* 11 */ "\u2580\u2588",
/* 12 */ "\u2584\u2584",
/* 13 */ "\u2588\u2584",
/* 14 */ "\u2584\u2588",
/* 15 */ "\u2588\u2588",
};
void esp_qrcode_print_console(esp_qrcode_handle_t qrcode)
{
int size = qrcodegen_getSize(qrcode);
int border = 2;
unsigned char num = 0;
for (int y = -border; y < size + border; y+=2) {
for (int x = -border; x < size + border; x+=2) {
num = 0;
if (qrcodegen_getModule(qrcode, x, y)) {
num |= 1 << 0;
}
if ((x < size + border) && qrcodegen_getModule(qrcode, x+1, y)) {
num |= 1 << 1;
}
if ((y < size + border) && qrcodegen_getModule(qrcode, x, y+1)) {
num |= 1 << 2;
}
if ((x < size + border) && (y < size + border) && qrcodegen_getModule(qrcode, x+1, y+1)) {
num |= 1 << 3;
}
printf("%s", lt[num]);
}
printf("\n");
}
printf("\n");
}
esp_err_t esp_qrcode_generate(esp_qrcode_config_t *cfg, const char *text)
{
enum qrcodegen_Ecc ecc_lvl;
uint8_t *qrcode, *tempbuf;
esp_err_t err = ESP_FAIL;
qrcode = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version));
if (!qrcode) {
return ESP_ERR_NO_MEM;
}
tempbuf = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version));
if (!tempbuf) {
free(qrcode);
return ESP_ERR_NO_MEM;
}
switch(cfg->qrcode_ecc_level) {
case ESP_QRCODE_ECC_LOW:
ecc_lvl = qrcodegen_Ecc_LOW;
break;
case ESP_QRCODE_ECC_MED:
ecc_lvl = qrcodegen_Ecc_MEDIUM;
break;
case ESP_QRCODE_ECC_QUART:
ecc_lvl = qrcodegen_Ecc_QUARTILE;
break;
case ESP_QRCODE_ECC_HIGH:
ecc_lvl = qrcodegen_Ecc_HIGH;
break;
default:
ecc_lvl = qrcodegen_Ecc_LOW;
break;
}
ESP_LOGI(TAG, "Encoding below text with ECC LVL %d & QR Code Version %d",
ecc_lvl, cfg->max_qrcode_version);
ESP_LOGI(TAG, "%s", text);
// Make and print the QR Code symbol
bool ok = qrcodegen_encodeText(text, tempbuf, qrcode, ecc_lvl,
qrcodegen_VERSION_MIN, cfg->max_qrcode_version,
qrcodegen_Mask_AUTO, true);
if (ok && cfg->display_func) {
cfg->display_func((esp_qrcode_handle_t)qrcode);
err = ESP_OK;
}
free(qrcode);
free(tempbuf);
return err;
}