Add QR Code display support

Add a component to support QR Code display required for different types of provisioning.
2020-10-27 16:09:40 +05:30
parent 1614cefd4f
commit 1a85d64da8
7 changed files with 1588 additions and 0 deletions
@@ -0,0 +1,114 @@
+// Copyright 2019 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 "qrcodegen.h"
+#include "qrcode.h"
+
+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;
+    }
+
+	// 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;
+}