1 // Copyright 2020 Espressif Systems (Shanghai) PTE LTD
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include <stdio.h>
16 #include <esp_err.h>
17 #include "esp_log.h"
18
19 #include "qrcodegen.h"
20 #include "qrcode.h"
21
22 static const char *TAG = "QRCODE";
23
24 static const char *lt[] = {
25 /* 0 */ " ",
26 /* 1 */ "\u2580 ",
27 /* 2 */ " \u2580",
28 /* 3 */ "\u2580\u2580",
29 /* 4 */ "\u2584 ",
30 /* 5 */ "\u2588 ",
31 /* 6 */ "\u2584\u2580",
32 /* 7 */ "\u2588\u2580",
33 /* 8 */ " \u2584",
34 /* 9 */ "\u2580\u2584",
35 /* 10 */ " \u2588",
36 /* 11 */ "\u2580\u2588",
37 /* 12 */ "\u2584\u2584",
38 /* 13 */ "\u2588\u2584",
39 /* 14 */ "\u2584\u2588",
40 /* 15 */ "\u2588\u2588",
41 };
42
esp_qrcode_print_console(esp_qrcode_handle_t qrcode)43 void esp_qrcode_print_console(esp_qrcode_handle_t qrcode)
44 {
45 int size = qrcodegen_getSize(qrcode);
46 int border = 2;
47 unsigned char num = 0;
48
49 for (int y = -border; y < size + border; y+=2) {
50 for (int x = -border; x < size + border; x+=2) {
51 num = 0;
52 if (qrcodegen_getModule(qrcode, x, y)) {
53 num |= 1 << 0;
54 }
55 if ((x < size + border) && qrcodegen_getModule(qrcode, x+1, y)) {
56 num |= 1 << 1;
57 }
58 if ((y < size + border) && qrcodegen_getModule(qrcode, x, y+1)) {
59 num |= 1 << 2;
60 }
61 if ((x < size + border) && (y < size + border) && qrcodegen_getModule(qrcode, x+1, y+1)) {
62 num |= 1 << 3;
63 }
64 printf("%s", lt[num]);
65 }
66 printf("\n");
67 }
68 printf("\n");
69 }
70
esp_qrcode_generate(esp_qrcode_config_t * cfg,const char * text)71 esp_err_t esp_qrcode_generate(esp_qrcode_config_t *cfg, const char *text)
72 {
73 enum qrcodegen_Ecc ecc_lvl;
74 uint8_t *qrcode, *tempbuf;
75 esp_err_t err = ESP_FAIL;
76
77 qrcode = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version));
78 if (!qrcode) {
79 return ESP_ERR_NO_MEM;
80 }
81
82 tempbuf = calloc(1, qrcodegen_BUFFER_LEN_FOR_VERSION(cfg->max_qrcode_version));
83 if (!tempbuf) {
84 free(qrcode);
85 return ESP_ERR_NO_MEM;
86 }
87
88 switch(cfg->qrcode_ecc_level) {
89 case ESP_QRCODE_ECC_LOW:
90 ecc_lvl = qrcodegen_Ecc_LOW;
91 break;
92 case ESP_QRCODE_ECC_MED:
93 ecc_lvl = qrcodegen_Ecc_MEDIUM;
94 break;
95 case ESP_QRCODE_ECC_QUART:
96 ecc_lvl = qrcodegen_Ecc_QUARTILE;
97 break;
98 case ESP_QRCODE_ECC_HIGH:
99 ecc_lvl = qrcodegen_Ecc_HIGH;
100 break;
101 default:
102 ecc_lvl = qrcodegen_Ecc_LOW;
103 break;
104 }
105
106 ESP_LOGI(TAG, "Encoding below text with ECC LVL %d & QR Code Version %d",
107 ecc_lvl, cfg->max_qrcode_version);
108 ESP_LOGI(TAG, "%s", text);
109 // Make and print the QR Code symbol
110 bool ok = qrcodegen_encodeText(text, tempbuf, qrcode, ecc_lvl,
111 qrcodegen_VERSION_MIN, cfg->max_qrcode_version,
112 qrcodegen_Mask_AUTO, true);
113 if (ok && cfg->display_func) {
114 cfg->display_func((esp_qrcode_handle_t)qrcode);
115 err = ESP_OK;
116 }
117
118 free(qrcode);
119 free(tempbuf);
120 return err;
121 }
122
