WriteableBitmapRenderer.RenderAsync() ArgumentException "Value does not fall within the expected range"

Question

I'm developing a WP8 app using Nokia Imaging SDK. I'm trying to add filter effect to an image and render it into a WriteableBitmap.

Here is my code:

private async void PhotoChosen(object sender, PhotoResult photoResult)
    {
        if (photoResult != null)
        {
            BitmapImage bitmap = new BitmapImage();
            bitmap.SetSource(photoResult.ChosenPhoto);

            WriteableBitmap wb = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);

            StreamImageSource source = new StreamImageSource(photoResult.ChosenPhoto);

            var effects = new FilterEffect(source);
            effects.Filters = new IFilter[] { new SketchFilter() };
            var renderer = new WriteableBitmapRenderer(effects, wb);

            await renderer.RenderAsync();
        }
    }

All is going fine, but when this line is processing:

await renderer.RenderAsync();

This ArgumentException is thrown:

Value does not fall within the expected range

I think I've made a mistake creating the IImageProvider effects or the WriteableBitmap wb

Does anyone got this problem and found an issue ? Thanks :)

David Božjak · Accepted Answer · 2014-01-17 12:21:22Z

4

You need to set the stream position before setting it as source for StreamImageSource.

BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(photoResult.ChosenPhoto);

WriteableBitmap wb = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);

photoResult.ChosenPhoto.Position = 0;

StreamImageSource source = new StreamImageSource(photoResult.ChosenPhoto);

You need to do this because you have called bitmap.SetSource(photoResult.ChosenPhoto). That means that the stream has already been read once, therefore it's position is at the very end of the stream. When StreamImageSource tries to read it, it is already at the end, thus "Value does not fall within the expected range."

edited Jan 17, 2014 at 12:21

David Božjak

17.8k18 gold badges71 silver badges98 bronze badges

answered Jan 16, 2014 at 21:55

Igor Ralic

15k4 gold badges45 silver badges52 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

WriteableBitmapRenderer.RenderAsync() ArgumentException "Value does not fall within the expected range"

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related