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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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Convert RenderTargetBitmap to Bitmap

This looks like a dup question, it is, but no one has answered the actual question(s). Here goes: Basically, I'm rendering a ViewPort3D as a 2D snapshot in code, but need to convert that type RenderTargetBitmap into the type System.Drawing.Bitmap…
MC9000
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Convert RenderTargetBitmap into System.Drawing.Image

I have 3D WPF visual that I want to pass into an Excel cell (via clipboard buffer). With "normal" BMP images it works but I do not know how to convert a RenderTargetBitmap. My code looks like this: System.Windows.Media.Imaging.RenderTargetBitmap…
Stefan Olsson
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How to freeze freezable objects that cannot be frozen

In my scenario I want to freeze a non changing BitmapCacheBrush before I want to render it in a background task. Unfortunately I receive the error "This Freezable cannot be frozen". Is there any workaround or hacky way freeze also not freezable…
Andreas
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RenderTargetBitmap is always anti-aliasing my DrawingVisual

I have to render the text from a TextBox into a WriteableBitmap. This code is working pretty well but the text in it is blurry or anti-aliased. Any ideas on how to keep it aliased and crisp? text = new FormattedText(tb.Text, new…
Aj_1994
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How to use PixelFormats.IndexedX with RenderTargetBitmap?

I am looking to render a DrawingVisual (visual in the example) to a bitmap using RenderTargetBitmap with the view to set this bitmap as the background to a Canvas as below: var bmp = new RenderTargetBitmap(2000, 50, 120, 96,…
Gavin S
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Error using using RenderTargetBitmap in UWP

I'm trying to create a bitmap image, and have the following code: RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(); await renderTargetBitmap.RenderAsync(uielement); IBuffer pixels = await renderTargetBitmap.GetPixelsAsync(); . .…
Paul Michaels
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Snapshot of an WPF Canvas Area using RenderTargetBitmap

I want to create a Snapshot of the Canvas Area in my Application. I'm using Visual brush to get the Snapshot and saving the same using PngEncoder. But the resulting PNG is just a empty black image. I'm not sure the issue is with the BitmapSource…
Amar
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Why are all the coordinates and sizes weird?

This code produced the following image. DrawingVisual visual = new DrawingVisual(); DrawingContext ctx = visual.RenderOpen(); FormattedText txt = new FormattedText("45", CultureInfo.CurrentCulture, FlowDirection.LeftToRight, new…
user47589
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RenderTargetBitmap Memory Leak

am trying to render an image with RenderTargetBitmap every time i create an instance from RenderTargetBitmap to render image the memory increased and when am done the memory never released and this is the code : RenderTargetBitmap rtb = new…
Muhammad Al-Own
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RenderTargetBitmap using a PngBitmapEncoder is generating blank images on a virtual machine when there is no display, Windows 10 Version 1903

Our .NET application has the ability to generate .png files which are screenshots of a WPF Canvas. This can be triggered from a client and handled by another of our applications (essentially something that has jobs farmed out to it that are queued…
Daniel F
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WPF CroppedBitmap + RenderTargetBitmap = EventHandler leak problem and Freeze problem too

I am wondering if there is a .net EventHandler leak surrounding CroppedBitmap and RenderTargetBitmap. It's causing me a huge nightmare! My WPF app runs an always running render call at 60fps. I noticed that after a time, the content being rendered…
Martin B
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Use WPF in combination with Hardware Rendering instead of RenderTargetBitmap

The WPF application I have build has a Viewport3D containg all kinds of UIElement3D objects. Now I would like to save a high resolution snapshot of a certain view to a file. I have tried RenderTargetBitmap in the past, but I do not like this…
Jan van de Pol
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How to render a WPF Hwnd with Graphics Object

After the RenderTargetBitmap is much too slow. I tried a different approach. Unfortunately my attempt was not successful. Hopefully some of you guys can figure out why this code is not working. var myPopup = new Popup(); var child =…
Andreas
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How to save a non-fuzzy image of a control in WPF?

I am using a DrawingContext to draw images. I then render the result to a RenderTargetBitmap. I also render a Canvas to the same RenderTargetBitmap. Even though the pixel boundaries are crisp on screen, they become blurred and fuzzy when…
nb1forxp
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WPF Memory Leak using RenderTargetBitmap?

I'm a little baffled by a memory leak in my WPF code. I'm rendering some 3D geometry to several RenderTargetBitmaps, then rendering each of those to a large, master RenderTargetBitmap. But when I do this, I get a memory leak that crashes my app…
TrespassersW
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