Function doTimestamp

ESP32_AP-Flasher/src/makeimage.cpp:386–415

The "ts_option" is a bitmapped variable with a default value of 1 which is black on white, long format @ bottom right. b2, b1, b0: 0 - no timestamp 1 - bottom right 2 - top right 3 - bottom left 4 - top left 5 -> 7 reserved b3: 0 - long format (year-month-day hr:min) 1 - short format (month-day hr:min) b4: 0 - black on white 1 - white on black b5 -> b7: reserved

// b5 -> b7: reserved
//
void doTimestamp(TFT_eSprite *spr, uint8_t ts_option) {
    time_t now = time(nullptr);
    struct tm *timeinfo = localtime(&now);
    char buffer[20];
    strftime(buffer, sizeof(buffer),
             (ts_option & 0x8) ? "%m-%d %H:%M" : "%Y-%m-%d %H:%M",timeinfo);
    int ts_chars = strlen(buffer);

    uint16_t char_color;
    uint16_t bg_color;

    if(ts_option & 0x10) {
       char_color = TFT_WHITE;
       bg_color= TFT_BLACK;
    }
    else {
       char_color = TFT_BLACK;
       bg_color = TFT_WHITE;
    }
    
    ts_option = (ts_option & 0x3) - 1;

    int32_t ts_x = (ts_option & 2) ? 1 : spr->width() - ts_chars * 6 - 2;
    int32_t ts_y = (ts_option & 1) ? 1 : spr->height() - 10;

    spr->drawRect(ts_x - 1, ts_y - 1, ts_chars * 6 + 1, 9, bg_color);
    spr->setTextColor(char_color, bg_color);
    spr->setCursor(ts_x,ts_y);
    spr->print(buffer);
}

void spr2buffer(TFT_eSprite &spr, String &fileout, imgParam &imageParams) {
    long t = millis();