CropFilter Class

Crops the image to a specified region.

Inheritance Hierarchy

System..::..Object  Nokia.Graphics.Imaging..::..CropFilter

Namespace: Nokia.Graphics.ImagingAssembly: Nokia.Graphics.Imaging (in Nokia.Graphics.Imaging.dll) Version: 255.255.255.255

Syntax

C#
public sealed class CropFilter : IFilter, 
	__ICropFilterPublicNonVirtuals
Visual Basic
Public NotInheritable Class CropFilter 
	Implements IFilter, __ICropFilterPublicNonVirtuals
Visual C++
public ref class CropFilter sealed : IFilter, 
	__ICropFilterPublicNonVirtuals

Examples

C#

This sample takes CameraCaptureTask result photo and applies a filter to it.

Universal apps:

private async void captureButton_Click(object sender, RoutedEventArgs e)
{
    await mediaCapture.StopPreviewAsync();

    var stream = new InMemoryRandomAccessStream();
    await mediaCapture.CapturePhotoToStreamAsync(ImageEncodingProperties.CreateJpeg(), stream);
    stream.Seek(0);

    using (var source = new RandomAccessStreamImageSource(stream, ImageFormat.Jpeg))
    {
        // Create effect collection with the source stream
        using (var filters = new FilterEffect(source))
        {
            // Initialize the filter and add the filter to the FilterEffect collection
            filters.Filters = new IFilter[] { new CropFilter(new Windows.Foundation.Rect(0, 0, 500, 500)) };

            // Create a target where the filtered image will be rendered to
            var target = new WriteableBitmap((int)(Window.Current.Bounds.Width), (int)(Window.Current.Bounds.Height));

            // Create a new renderer which outputs WriteableBitmaps
            using (var renderer = new WriteableBitmapRenderer(filters, target))
            {
                // Render the image with the filter(s)
                await renderer.RenderAsync();

                // Set the output image to Image control as a source
                ImageControl.Source = target;
            }
        }
    }
}

Silverlight:

async void CaptureTask_Completed(object sender, PhotoResult e)
{
    // Create a source to read the image from PhotoResult stream
    using (var source = new StreamImageSource(e.ChosenPhoto))
    {
        // Create effect collection with the source stream
        using (var filters = new FilterEffect(source))
        {
            // Initialize the filter 
            var sampleFilter = new CropFilter(new Windows.Foundation.Rect(0, 0, 500, 500));

            // Add the filter to the FilterEffect collection
            filters.Filters = new IFilter[] { sampleFilter };

            // Create a target where the filtered image will be rendered to
            var target = new WriteableBitmap((int)ImageControl.ActualWidth, (int)ImageControl.ActualHeight);

            // Create a new renderer which outputs WriteableBitmaps
            using (var renderer = new WriteableBitmapRenderer(filters, target))
            {
                // Render the image with the filter(s)
                await renderer.RenderAsync();

                // Set the output image to Image control as a source
                ImageControl.Source = target;
            }
        }
    }
}
Visual Basic


Visual C++



Last updated 19 June 2014

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