How to work with LumiaImagingSDK.UWP 3.0 in windows 10 mobile app?

Question

I work with app for windows 10. I tried to make an application for image editing.

var client = new HttpClient();
var stream = await client.GetStreamAsync(ImageUrl);
var source = new StreamImageSource(stream);
var info = await source.GetInfoAsync();

and I get an error in line var source = new StreamImageSource(stream);:

Exception thrown: 'System.IO.FileNotFoundException' in Lumia.Imaging.Managed.dll

Exception thrown: 'System.IO.FileNotFoundException' in mscorlib.ni.dll

RenderImage error: The specified module could not be found. (Exception from HRESULT: 0x8007007E)

What am I doing wrong? I Work with LumiaImagingSDK.UWP 3.0.

Answer 1

The formats supported by the StreamImageSource ctor of the Imaging SDK are : Jpeg Png Gif Bmp Wbmp Tiff

Check that your URL is correct and points to one of these images formats.

Answer 2

As we've discussed in the comment, you want to blur image, and there is built-in BlurEffect Class in the LumiaImagingSDK.UWP 3.0, I used this effect to wrote a demo here:

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
    <Grid.RowDefinitions>
        <RowDefinition Height="500" />
        <RowDefinition Height="50" />
    </Grid.RowDefinitions>
    <Grid Grid.Row="0">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>
        <Image x:Name="originalimg" Grid.Column="0" />
        <SwapChainPanel x:Name="SwapChainPanelTarget" Grid.Column="1" />
    </Grid>
    <Button Content="Click Me" Click="Button_Click" Grid.Row="1" HorizontalAlignment="Center" />
</Grid>

Code behind:

private async void Button_Click(object sender, RoutedEventArgs e)
{
    Uri uri = new Uri("xxxx(uri address)");
    using (HttpClient client = new HttpClient())
    {
        try
        {
            HttpResponseMessage response = await client.GetAsync(uri);
            if (response != null && response.StatusCode == HttpStatusCode.Ok)
            {
                string filename = "test.jpg";
                var imageFile = await ApplicationData.Current.LocalFolder.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);
                using (IRandomAccessStream stream = await imageFile.OpenAsync(FileAccessMode.ReadWrite))
                {
                    await response.Content.WriteToStreamAsync(stream);
                }
                StorageFile file = await ApplicationData.Current.LocalFolder.GetFileAsync(filename);

                //show original image in the Image control
                IRandomAccessStream inputStream1 = await file.OpenReadAsync();
                BitmapImage bitmap = new BitmapImage();
                bitmap.SetSource(inputStream1);
                originalimg.Source = bitmap;

                //use the blureffect
                IRandomAccessStream inputStream = await file.OpenReadAsync();
                BlurEffect blureffect = new BlurEffect();
                inputStream.Seek(0);
                blureffect.Source = new Lumia.Imaging.RandomAccessStreamImageSource(inputStream);
                var render = new SwapChainPanelRenderer(blureffect, SwapChainPanelTarget);
                await render.RenderAsync();
            }
        }
        catch
        {
        }
    }
}

I stored the image each time in the local folder, and I used Windows.Web.Http namespace, not System.Net.Http Namespace. Since I can't reproduce your problem, to save the image to file and read the file stream here can work.