ESPHome  2024.2.1
qr_code.cpp
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1 #include "qr_code.h"
3 #include "esphome/core/color.h"
4 #include "esphome/core/log.h"
5 
6 namespace esphome {
7 namespace qr_code {
8 
9 static const char *const TAG = "qr_code";
10 
12  ESP_LOGCONFIG(TAG, "QR code:");
13  ESP_LOGCONFIG(TAG, " Value: '%s'", this->value_.c_str());
14 }
15 
16 void QrCode::set_value(const std::string &value) {
17  this->value_ = value;
18  this->needs_update_ = true;
19 }
20 
21 void QrCode::set_ecc(qrcodegen_Ecc ecc) {
22  this->ecc_ = ecc;
23  this->needs_update_ = true;
24 }
25 
27  ESP_LOGV(TAG, "Generating QR code...");
28  uint8_t tempbuffer[qrcodegen_BUFFER_LEN_MAX];
29 
30  if (!qrcodegen_encodeText(this->value_.c_str(), tempbuffer, this->qr_, this->ecc_, qrcodegen_VERSION_MIN,
31  qrcodegen_VERSION_MAX, qrcodegen_Mask_AUTO, true)) {
32  ESP_LOGE(TAG, "Failed to generate QR code");
33  }
34 }
35 
36 void QrCode::draw(display::Display *buff, uint16_t x_offset, uint16_t y_offset, Color color, int scale) {
37  ESP_LOGV(TAG, "Drawing QR code at (%d, %d)", x_offset, y_offset);
38 
39  if (this->needs_update_) {
40  this->generate_qr_code();
41  this->needs_update_ = false;
42  }
43 
44  uint8_t qrcode_width = qrcodegen_getSize(this->qr_);
45 
46  for (int y = 0; y < qrcode_width * scale; y++) {
47  for (int x = 0; x < qrcode_width * scale; x++) {
48  if (qrcodegen_getModule(this->qr_, x / scale, y / scale)) {
49  buff->draw_pixel_at(x_offset + x, y_offset + y, color);
50  }
51  }
52  }
53 }
54 } // namespace qr_code
55 } // namespace esphome
uint16_t x
Definition: tt21100.cpp:17
void dump_config() override
Definition: qr_code.cpp:11
uint8_t qr_[qrcodegen_BUFFER_LEN_MAX]
Definition: qr_code.h:31
uint16_t y
Definition: tt21100.cpp:18
std::string value_
Definition: qr_code.h:28
qrcodegen_Ecc ecc_
Definition: qr_code.h:29
void draw(display::Display *buff, uint16_t x_offset, uint16_t y_offset, Color color, int scale)
Definition: qr_code.cpp:36
void draw_pixel_at(int x, int y)
Set a single pixel at the specified coordinates to default color.
Definition: display.h:184
This is a workaround until we can figure out a way to get the tflite-micro idf component code availab...
Definition: a01nyub.cpp:7
void set_ecc(qrcodegen_Ecc ecc)
Definition: qr_code.cpp:21
void set_value(const std::string &value)
Definition: qr_code.cpp:16