使用 Nokia Imaging SDK 开发有滤镜功能的 Windows Phone 8 应用

SupportedOrientations="Landscape" Orientation="Landscape"

<Canvas x:Name="LayoutRoot" Background="Transparent">

    <TextBlock Text="Nokia Imaging SDK" Style="{StaticResource PhoneTextNormalStyle}" />
    <Image x:Name="CartoonImage" Height="480" Width="800" Stretch="UniformToFill" />
    <Image x:Name="OriginalImage" Height="100" Width="157" Stretch="UniformToFill"  Canvas.Left="24" Canvas.Top="70" Canvas.ZIndex="0"/>
    <Button Content="Pick an image" Click="PickAnImageButton_Click" Canvas.Left="24" Canvas.Top="398" />
    <Button Content="Save the image" Click="SaveImage_Click" x:Name="SaveButton" Canvas.Left="569" Canvas.Top="398" />

Canvas>

using Nokia.Graphics.Imaging; 
using System.Runtime.InteropServices.WindowsRuntime; 
using Microsoft.Phone.Tasks; 
using Windows.Storage.Streams; 
using Microsoft.Xna.Framework.Media;

public partial class MainPage : PhoneApplicationPage

{

private EditingSession _session;

private void PickAnImageButton_Click(object sender, RoutedEventArgs e) 
{ 
    PhotoChooserTask chooser = new PhotoChooserTask(); 
    chooser.Completed += PickImageCallback; 
    chooser.Show(); 
}

private async void PickImageCallback(Object sender, PhotoResult e) 
{ 
    if (e.TaskResult != TaskResult.OK) 
    { 
        return; 
    } 
    _session = await EditingSessionFactory.CreateEditingSessionAsync(e.ChosenPhoto); 
    try 
    { 
        // Decode the jpeg for showing the original image 
        await _session.RenderToImageAsync(OriginalImage, OutputOption.PreserveAspectRatio); 
        // Apply the filter and decode into the bitmap. 
        _session.AddFilter(FilterFactory.CreateCartoonFilter(true)); 
        await _session.RenderToImageAsync(CartoonImage, OutputOption.PreserveAspectRatio); 
    } 
    catch (Exception exception) 
    { 
        MessageBox.Show("Exception:" + exception.Message); 
        return; 
    } 
    SaveButton.IsEnabled = true; 
}

private async void SaveImage_Click(object sender, RoutedEventArgs e) 
{ 
    if (_session == null) 
    { 
        return; 
    } 
    // The image has been already filtered. 
    // We only need to render the output as a jpeg 
    IBuffer jpegOut = await _session.RenderToJpegAsync(); 
    // Save the image as a jpeg to the camera roll 
    MediaLibrary library = new MediaLibrary(); 
    string filename = "SavedPicture_" + DateTime.Now.ToString("G"); 
    Picture pic = library.SavePicture(filename, jpegOut.AsStream()); 
    MessageBox.Show("Image saved"); 
}