public byte[] DisplayBuffer; // A working pixel buffer for your code
        public ILI9341Display(string defaultText, int ulValue, int dcpin, int resetpin)
        {
            LCD_VERTICAL_MAX   = VERTICAL_MAX_DEFAULT;   // Y
            LCD_HORIZONTAL_MAX = HORIZONTAL_MAX_DEFAULT; // X

            //InitSPI(SpiDevice SPI, int SPIpin, int speed, SpiMode mode, string SPI_CONTROLLER_NAME)
            DCPin         = ILI9341.InitGPIO(dcpin, GpioPinDriveMode.Output, GpioPinValue.High);
            ResetPin      = ILI9341.InitGPIO(resetpin, GpioPinDriveMode.Output, GpioPinValue.High);
            cursorX       = 0;
            cursorY       = 0;
            DisplayBuffer = new byte[LCD_VERTICAL_MAX * LCD_HORIZONTAL_MAX * 2]; // A working pixel buffer for your code, RGB565
            currentImage  = "";
        }
        public static async Task LoadBitmap(ILI9488Display display, string name)
        {
            try
            {
                StorageFile srcfile = await StorageFile.GetFileFromApplicationUriAsync(new Uri(name));

                using (IRandomAccessStream fileStream = await srcfile.OpenAsync(Windows.Storage.FileAccessMode.Read))
                {
                    BitmapDecoder decoder = await BitmapDecoder.CreateAsync(fileStream);

                    BitmapTransform transform = new BitmapTransform()
                    {
                        ScaledWidth  = Convert.ToUInt32(display.LCD_HORIZONTAL_MAX),
                        ScaledHeight = Convert.ToUInt32(display.LCD_VERTICAL_MAX)
                    };
                    PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
                        BitmapPixelFormat.Bgra8,
                        BitmapAlphaMode.Straight,
                        transform,
                        ExifOrientationMode.RespectExifOrientation,
                        ColorManagementMode.DoNotColorManage
                        );

                    byte[] sourcePixels = pixelData.DetachPixelData();
                    if (sourcePixels.Length != display.LCD_HORIZONTAL_MAX * display.LCD_VERTICAL_MAX * 4)
                    {
                        return;
                    }
                    int pi = 0;
                    for (UInt32 x = 0; x < sourcePixels.Length - 1; x += 4)
                    {
                        // we ignore the alpha value [3]
                        ushort temp = ILI9341.RGB24ToRGB565(sourcePixels[x + 2], sourcePixels[x + 1], sourcePixels[x]);
                        display.DisplayBuffer[pi * 2]     = (byte)((temp >> 8) & 0xFF);
                        display.DisplayBuffer[pi * 2 + 1] = (byte)(temp & 0xFF);
                        pi++;
                    }
                }
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            display.currentImage = name;
        }