protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
if (e.Parameter is IImageProvider)
{
var sourceParam = (IImageProvider)e.Parameter;
ImageElement.Source = effect = new CartoonEffect(sourceParam);
}
}
async Task <Uri> Cartoon()
{
using (var source = new StorageFileImageSource(imageStorageFile))
{
var inf = await source.GetInfoAsync();
using (var sharpnessEffect = new CartoonEffect(source)
{
DistinctEdges = false
})
{
LastEffect = sharpnessEffect;
return(await SaveToImage());
}
}
}
private async Task <bool> ApplyFilterAsync(StorageFile file)
{
// Open a stream for the selected file.
IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.Read);
string errorMessage = null;
try
{
// Show thumbnail of original image.
_thumbnailImageBitmap.SetSource(fileStream);
OriginalImage.Source = _thumbnailImageBitmap;
// Rewind stream to start.
fileStream.Seek(0);
// A cartoon effect is initialized with selected image stream as source.
var imageStream = new RandomAccessStreamImageSource(fileStream);
_cartoonEffect = new CartoonEffect(imageStream);
// Render the image to a WriteableBitmap.
var renderer = new WriteableBitmapRenderer(_cartoonEffect, _cartoonImageBitmap);
_cartoonImageBitmap = await renderer.RenderAsync();
_cartoonImageBitmap.Invalidate();
// Set the rendered image as source for the cartoon image control.
CartoonImage.Source = _cartoonImageBitmap;
}
catch (Exception exception)
{
errorMessage = exception.Message;
}
if (!string.IsNullOrEmpty(errorMessage))
{
var dialog = new MessageDialog(errorMessage);
await dialog.ShowAsync();
return(false);
}
return(true);
}
