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Questions tagged [rendertargetbitmap]

The RenderTargetBitmap class, part of the .NET Framework (from version 3.0), converts a System.Windows.Media.Visual object into a bitmap.

The RenderTargetBitmap class (System.Windows.Media.Imaging.RenderTargetBitmap) converts a Visual (System.Windows.Media.Visual) object into a bitmap.

It can be used for example to render text as an image.

Support of RenderTargetBitmap was added to version 3.0 of the .NET Framework.

125 questions
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RenderTargetBitmap and DPI

I don't understand why the DPI parameters on the RenderTargetBitmap are used the way they seem to be used. Quite often I see code that deals with non-standard DPI settings by adjusting the image size based on the DPI like this: new…
Patrick Klug
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Create WPF element offscreen and render to bitmap

I can't understand why this doesn't work, or what I need to get it to work. To repro, create a simple WPF application and replace the main window's constructor thusly: public MainWindow() { InitializeComponent(); // simple…
user1228
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Convert an IBuffer to a byte array in Windows Phone 8.1, how?

I'm writing an application for Windows Phone 8.1. I need to save an UIElement as an image file (I'd prefer JPG or PNG). I'm using RenderTargetBitmap class to do this. After calling the method RenderAsync on my UIElement I create an IBuffer that…
DarioDP
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RenderTargetBitmap and Viewport3D - Quality Issues

I'm wanting to export a 3D scene from a Viewport3D to a bitmap. The obvious way to do this would be to use RenderTargetBitmap -- however when I this the quality of the exported bitmap is significantly lower than the on-screen image. Looking around…
Grokys
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How to convert a XPS file to an image in high quality (rather than blurry low resolution)?

I'm trying to convert an XPS with WPF. The idea is that these images can be loaded with silverlight 4, for this I am using the following code: // XPS Document XpsDocument xpsDoc = new XpsDocument(xpsFileName,…
Ricardo Pons
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WPF RenderTargetBitmap Missing Elements

I have a TreeView with small icons displayed in the data template. I'm trying to save the Treeview as a PNG using RenderTargetBitmap. The image saves correctly on small data sets. However, if the data set becomes too large, some of the icons are…
Jesse Seger
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How to render InkCanvas to an image in UWP Windows 10 application?

The RenderTargetBitmap class worked with simple Canvas + InkManager (in Windows 8.1) to render ink strokes to an image. UWP introduced InkCanvas and a new Inking API. However, it seems like the RenderTargetBitmap does not work with that. When I try…
mudbox
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Saving a canvas to png C# wpf

So I am trying to take a snapshot of my canvas in WPF C# so that I can save it out as a png. The image saves incorrectly at present as it is including the left and top margins. This is what I have: create a rectangle for the size of the canvas. if…
Daniel
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Convert RenderTargetBitmap to BitmapImage

I have a RenderTargetBitmap, I need to convert it to BitmapImage. Please check the code below. RenderTargetBitmap bitMap = getRenderTargetBitmap(); Image image = new Image();// This is a Image image.Source = bitMap; In the above code I have used…
sharmila
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DrawingContext to Bitmap file

I have a DrawingContext (part of a Visual or a DrawingGroup), where I draw a bunch of rectangles and/or 1-bit images on top of each other. Think of it as a masking 1-bit image. I would like to convert this into a bitmap image file. Using…
LadderLogic
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Windows update KB4040972/73 causes black images with WPF classes

I have an application relying on Deep zoom images (convertion from a PNG to a pyramid of JPGs in various scale) which we use DeepZoomTools.dll for. This is relying on PresentationCore.dll and has been working fine for years. After the rollout of…
Johan
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RenderTargetBitmap + Resource'd VisualBrush = incomplete image

I've found a new twist on the "Visual to RenderTargetBitmap" question! I'm rendering previews of WPF stuff for a designer. That means I need to take a WPF visual and render it to a bitmap without that visual ever being displayed. Got a nice little…
user1228
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ContentControl + RenderTargetBitmap + empty image

Im trying to create some chart images without ever displaying those charts on the screen. I'v been at this for quite a while and tried a lot of different things but nothing seems to work. The code works perfectly if I display the chart in a window…
Kelly
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WPF "Lazy" VisualBrush

I'm trying to implement somesting like an "Lazy" VisualBrush right now. Does anybody have an idea how to to that? Meaning: Something that behaves like an VisualBrush but does not update on every change in the Visual but at max once a second (or…
harri
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How to bitblit from RenderTargetBitmap to WriteableBitmap?

I'm rendering dozens of visuals to the RenderTargetBitmap. Each is rendered in it's own Rect. What I want to do is to copy one of these Rect areas rendered from RenderTargetBitmap instance into the same area of the WriteableBitmap...Fast copy rect…
Alexander Efimov
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