QR-Code Generator
Generates QR codes as LVGL canvas images. Enable with LV_USE_QRCODE in lv_conf.h.
QR code with palette colors
Render a 150 px QR code encoding an LVGL URL with custom dark and light colors.
A QR code widget is centered on the active screen and sized to 150 px.
lv_qrcode_set_dark_color and lv_qrcode_set_light_color use
darkened and lightened entries from LV_PALETTE_BLUE and
LV_PALETTE_LIGHT_BLUE, lv_qrcode_update encodes https://lvgl.io,
and a matching 5 px border is applied via local style properties.
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