public static byte[] GetFirstQuadrant(this byte[] source, uint oriPixelWidth, uint oriPixelHeight)
{
var extract = new ExtractImage();
extract.ExtractWholeImage(source, oriPixelWidth, oriPixelHeight);
var first = (source.Length / 2) / 2;
return(source.Take(first).ToArray());
}
private async void LoadPictureButton_Click(object sender, RoutedEventArgs e)
{
var imageExtract = new ExtractImage();
var textExtract = new ExtractText();
var sourceImageFile = await FileOption.SelectSourceImageFile();
if (sourceImageFile == null)
{
return;
}
var copyBitmapImage = await sourceImageFile.MakeCopyOfImage();
using (var fileStream = await sourceImageFile.OpenAsync(FileAccessMode.Read))
{
var decoder = await BitmapDecoder.CreateAsync(fileStream);
var transform = new BitmapTransform
{
ScaledWidth = Convert.ToUInt32(copyBitmapImage.PixelWidth),
ScaledHeight = Convert.ToUInt32(copyBitmapImage.PixelHeight)
};
var pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.IgnoreExifOrientation,
ColorManagementMode.DoNotColorManage
);
var sourceOriPixels = pixelData.DetachPixelData();
var firstPixelcolor =
PixelColor.GetPixelBgra8(sourceOriPixels, 0, 0, decoder.PixelWidth, decoder.PixelHeight);
var secondPixelcolor =
PixelColor.GetPixelBgra8(sourceOriPixels, 0, 1, decoder.PixelWidth, decoder.PixelHeight);
if (firstPixelcolor.R == 119 && firstPixelcolor.G == 119 && firstPixelcolor.B == 119 &&
(secondPixelcolor.R & 1) == 1)
{
this.messageTextBlock.Text = "There is a message here";
if ((secondPixelcolor.G & (1 << 1)) == 0)
{
this.textToEncryptBox.Text =
textExtract.ExtractImageForText(sourceOriPixels, decoder.PixelWidth,
decoder.PixelHeight);
}
else if ((secondPixelcolor.G & (1 << 0)) == 0)
{
this.textToEncryptBox.Text =
textExtract.ExtractImageForTextwithTwoPixels(sourceOriPixels, decoder.PixelWidth,
decoder.PixelHeight);
}
}
else if (firstPixelcolor.R == 119 && firstPixelcolor.G == 119 && firstPixelcolor.B == 119 &&
(secondPixelcolor.R & 1) == 0)
{
this.messageTextBlock.Text = "There is a message here";
imageExtract.ExtractWholeImage(sourceOriPixels, decoder.PixelWidth, decoder.PixelHeight);
this.decryptedImage = new WriteableBitmap((int)decoder.PixelWidth, (int)decoder.PixelHeight);
using (var writeStream = this.decryptedImage.PixelBuffer.AsStream())
{
await writeStream.WriteAsync(sourceOriPixels, 0, sourceOriPixels.Length);
this.encrptedImage.Source = this.decryptedImage;
}
}
else
{
this.messageTextBlock.Text = "There is no message here";
}
this.imageToEncript = sourceImageFile;
this.imageDisplayBox.Source = copyBitmapImage;
}
}