New application, QRCode generator (#160)

* Applications dependency, initial realization

* New application, qr code generator

* better buffer clearing

Co-authored-by: aanper <mail@s3f.ru>

applications/examples/u8g2_qrcode.c

@@ -0,0 +1,71 @@
+#include "u8g2/u8g2.h"
+#include "qrcode/qrcode.h"
+#include "flipper.h"
+
+void u8g2_DrawPixelSize(u8g2_t* u8g2, uint8_t x, uint8_t y, uint8_t size) {
+    for(uint8_t px = 0; px < size; px++) {
+        for(uint8_t py = 0; py < size; py++) {
+            u8g2_DrawPixel(u8g2, x + px, y + py);
+        }
+    }
+}
+
+void u8g2_qrcode(void* p) {
+    FuriRecordSubscriber* log = get_default_log();
+
+    // open record
+    FuriRecordSubscriber* fb_record = furi_open("u8g2_fb", false, false, NULL, NULL, NULL);
+
+    // Allocate a chunk of memory to store the QR code
+    // https://github.com/ricmoo/QRCode
+    // we init version 1, 21x21 px, 16 alphanumeric chars with
+    // QUARTILE error correction
+    const uint8_t qr_version = 1;
+    const uint8_t qr_error_correction = ECC_QUARTILE;
+
+    const uint8_t qr_x = 32;
+    const uint8_t qr_y = 0;
+    const uint8_t qr_size = 3;
+
+    // The structure to manage the QR code
+    QRCode qrcode;
+
+    // QR Code init
+    uint8_t qrcodeBytes[qrcode_getBufferSize(qr_version)];
+    qrcode_initText(&qrcode, qrcodeBytes, qr_version, qr_error_correction, "HELLO FLIPPER");
+
+    if(fb_record == NULL) {
+        fuprintf(log, "[widget] cannot create fb record\n");
+        furiac_exit(NULL);
+    }
+
+    u8g2_t* fb = furi_take(fb_record);
+
+    // clear display
+    if(fb != NULL) {
+        u8g2_ClearBuffer(fb);
+    }
+
+    while(1) {
+        if(fb != NULL) {
+            // draw qr code
+            for(uint8_t y = 0; y < qrcode.size; y++) {
+                for(uint8_t x = 0; x < qrcode.size; x++) {
+                    if(qrcode_getModule(&qrcode, x, y)) {
+                        u8g2_SetDrawColor(fb, 1);
+                        u8g2_DrawPixelSize(fb, qr_x + x * qr_size, qr_y + y * qr_size, qr_size);
+                    } else {
+                        u8g2_SetDrawColor(fb, 0);
+                        u8g2_DrawPixelSize(fb, qr_x + x * qr_size, qr_y + y * qr_size, qr_size);
+                    }
+                }
+            }
+        } else {
+            furiac_exit(NULL);
+        }
+
+        furi_commit(fb_record);
+
+        delay(1);
+    }
+}

applications/startup.h

@@ -26,6 +26,8 @@ void input_task(void* p);
 
 void coreglitch_demo_0(void* p);
 
+void u8g2_qrcode(void* p);
+
 const FlipperStartupApp FLIPPER_STARTUP[] = {
 #ifndef TEST
     {.app = display_u8g2, .name = "display_u8g2", .libs = ""},
@@ -55,4 +57,8 @@ const FlipperStartupApp FLIPPER_STARTUP[] = {
 #ifdef EXAMPLE_INPUT_DUMP
     {.app = application_input_dump, .name = "input dump", .libs = "input_task"},
 #endif
+
+#ifdef EXAMPLE_QRCODE
+    {.app = u8g2_qrcode, .name = "u8g2_qrcode", .libs = "display_u8g2"},
+#endif
 };