CODEWITHSUNDEEP
c#wpfuwp
Konstantin Chsherbakov
Konstantin Chsherbakov

Reputation: 652

System.Windows.Media in UWP

Recently I wrote a WPF program for detecting faces in the pictures. This program uses one of the ProjectOxford's APIs that is known as FaceAPI. Then I got an idea to port my application from WPF to UWP (Universal Windows Platform). But, during the development I faced up the problem with System.Windows.Media namespace. In my UWP application I just do not have such namespace, consequently I can not get access to all included classes, such that DrawingVisual, DrawingContext etc.

Here is problematic code block from WPF which need to be ported to UWP: 

if (faceRects.Length > 0)
{
    DrawingVisual visual = new DrawingVisual();
    DrawingContext drawindContext = visual.RenderOpen();

    drawindContext.drawimage(bitmapImage,
        new Rect(0, 0, bitmapImage.Width, bitmapImage.Height));

    double dpi = bitmapImage.DpiX;
    double resizefactor = 96 / dpi;

    foreach (var facerect in faceRects)
    {
        drawindContext.drawrectangle(
            Brushes.transparent,
            new Pen(Brushes.red, 2),
            new Rect(
                faceRect.Left * resizefactor,
                faceRect.Top * resizefactor,
                faceRect.Width * resizefactor,
                faceRect.Height * resizefactor
            )
        );
    }

    drawindcontext.close();

    rendertargetbitmap facewithrectbitmap = new rendertargetbitmap(
        (int)(bitmapsource.pixelwidth * resizefactor),
        (int)(bitmapsource.pixelheight * resizefactor),
        96,
        96,
        pixelformats.pbgra32);

    facewithrectbitmap.render(visual);

    facephoto.source = facewithrectbitmap;
}

Any ideas how to replace that?

Upvotes: 3

Views: 2498

Answers (1)

user5525674
user5525674

Reputation: 921

UWP uses a new set of namespaces -- the majority of these prefixed with Windows.* which is in contrast to the System.* prefix for WPF, although there are System.* namespaces used both by UWP and WPF. Here is a link for the new namespaces. You may also like to read the Guide to Universal Windows Platform apps for a better grasp of UWP basics.

As shown in the comment section, what you need is a namespace that starts with Windows.* and the links provided should put you right.

Upvotes: 2

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