private async void selectSourceImage_OnClick(object sender, RoutedEventArgs e)
{
try
{
_sourceImageFile = await SelectSourceImageFile();
ImageDisplay = await ToImageConverter.Convert(_sourceImageFile, ImageDisplay);
_sourceImage = ToWriteableBitmapConverter.ConvertToWriteableBitmap(ImageDisplay);
}
catch (Exception)
{
await FailedSelectionDialog();
}
}
private async void selectImageToEmbedWith_OnClick(object sender, RoutedEventArgs e)
{
try
{
_embedImageFile = await SelectSourceImageFile();
EmbedDisplay = await ToImageConverter.Convert(_embedImageFile, EmbedDisplay);
_embedImage = ToWriteableBitmapConverter.ConvertToWriteableBitmap(EmbedDisplay);
}
catch (Exception)
{
await FailedSelectionDialog();
}
}
private async void extractImageButton_OnClick(object sender, RoutedEventArgs e)
{
try
{
var image = await ImageEmbedder.ExtractHiddenImage(
ToWriteableBitmapConverter.ConvertToWriteableBitmap(ImageDisplay),
_sourceImageFile);
_imageResult = ToWriteableBitmapConverter.ConvertToWriteableBitmap(image);
EncryptedImage.Source = _imageResult;
await CustomDialog("Next, save the image to view the hidden message!");
}
catch (Exception)
{
await CustomDialog("There are no secrets behind this image");
}
}
public static async Task <Image> EncryptAsync(Image image, StorageFile sourceImageFile)
{
var imageToEncrypt = ToWriteableBitmapConverter.ConvertToWriteableBitmap(image);
using (var fileStream = await sourceImageFile.OpenAsync(FileAccessMode.Read))
{
var decoder = await BitmapDecoder.CreateAsync(fileStream);
var transform = new BitmapTransform
{
ScaledWidth = Convert.ToUInt32(imageToEncrypt.PixelWidth),
ScaledHeight = Convert.ToUInt32(imageToEncrypt.PixelHeight)
};
var pixelData = await decoder.GetPixelDataAsync(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Straight,
transform,
ExifOrientationMode.IgnoreExifOrientation,
ColorManagementMode.DoNotColorManage
);
var sourcePixels = pixelData.DetachPixelData();
var encryptedImage = Encrypt(sourcePixels, decoder);
using (var writeStream = imageToEncrypt.PixelBuffer.AsStream())
{
await writeStream.WriteAsync(encryptedImage, 0, encryptedImage.Length);
image.Source = imageToEncrypt;
return(image);
}
}
}