98     lv_draw_buf_t * draw_buf = lv_canvas_get_draw_buf(obj);  in lv_qrcode_update()  local
99     if(draw_buf == NULL) {  in lv_qrcode_update()
104     lv_draw_buf_clear(draw_buf, NULL);  in lv_qrcode_update()
107     lv_image_cache_drop(draw_buf);  in lv_qrcode_update()
117     int32_t scale = draw_buf->header.w / qr_size;  in lv_qrcode_update()
122         if(qrcodegen_version2size(i) * scale > draw_buf->header.w)  in lv_qrcode_update()
149     int32_t obj_w = draw_buf->header.w;  in lv_qrcode_update()
154     uint8_t * buf_u8 = (uint8_t *)draw_buf->data + 8;    /*+8 skip the palette*/  in lv_qrcode_update()
160     uint32_t row_byte_cnt = draw_buf->header.stride;  in lv_qrcode_update()
234     lv_draw_buf_t * draw_buf = lv_canvas_get_draw_buf(obj);  in lv_qrcode_destructor()  local
235     if(draw_buf == NULL) return;  in lv_qrcode_destructor()
236     lv_image_cache_drop(draw_buf);  in lv_qrcode_destructor()
239     lv_draw_buf_destroy(draw_buf);  in lv_qrcode_destructor()