How to: Encode and Decode a WDP Image

 

The following examples show how to decode and encode a Microsoft Windows Media Photo image using the specific WmpBitmapDecoder and WmpBitmapEncoder objects.

This example demonstrates how to decode a Windows Media Photo image using a WmpBitmapDecoder from a Uri.


            // Open a Stream and decode a WDP image
            Stream imageStreamSource = new FileStream("tulipfarm.wdp", FileMode.Open, FileAccess.Read, FileShare.Read);
            WmpBitmapDecoder decoder = new WmpBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
            BitmapSource bitmapSource = decoder.Frames[0];
            
            // Draw the Image
            Image myImage = new Image();
            myImage.Source = bitmapSource;
            myImage.Stretch = Stretch.None;
            myImage.Margin = new Thickness(20);

This example demonstrates how to encode a BitmapSource into a Windows Media Photo image using a WmpBitmapEncoder.

            int width = 128;
            int height = width;
            int stride = width / 8;
            byte[] pixels = new byte[height * stride];

            // Define the image palette
            BitmapPalette myPalette = BitmapPalettes.WebPalette;

            // Creates a new empty image with the pre-defined palette

            BitmapSource image = BitmapSource.Create(
                width,
                height,
                96,
                96,
                PixelFormats.Indexed1,
                myPalette,
                pixels,
                stride);

            FileStream stream = new FileStream("new.wdp", FileMode.Create);
            WmpBitmapEncoder encoder = new WmpBitmapEncoder();
            TextBlock myTextBlock = new TextBlock();
            myTextBlock.Text = "Codec Author is: " + encoder.CodecInfo.Author.ToString();
            encoder.Frames.Add(BitmapFrame.Create(image));
            encoder.Save(stream);

Imaging Overview

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