Stack Overflow
Stack Overflow

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
3
votes
1 answer

take a screenshot of WPF datagrid with scrollviewer

I'm trying to take a screenshot of a datagrid which has to many rows to be displayed. So there is a scrollviewer. So when I just put the datagrid into the Render Method of RenderTargetBitmap I obviously just get the viewable part of the datagrid. I…
david
  • 41
  • 4
3
votes
2 answers

Convert WPF Control to BitmapSource

This is kind of a two part question- First, why doesn't this code work? Canvas canvas = new Canvas { Width = 640, Height = 480 }; System.Windows.Size size = new System.Windows.Size( canvas.Width, canvas.Height); //Measure and arrange the…
Nicros
  • 5,031
  • 12
  • 57
  • 101
3
votes
1 answer

RenderTargetBitmap hardware accelerated analog

Is there a RenderTargetBitmap hardware accelerated analog in .net 3.5 sp1?
Alexander Efimov
  • 2,685
  • 3
  • 18
  • 22
3
votes
1 answer

Freeze visual brush? or any better idea?

I want to create a branch of thumb pictures for my UI, and I tried to do it in this way: RenderTargetBitmap renderer = new RenderTargetBitmap(WIDTH, HEIGHT, dpiX, dpiY, PixelFormats.Pbgra32); renderer.Render(vbox); renderer.Freeze(); "vbox" is my…
woodheadz
  • 31
  • 3
3
votes
1 answer

RenderTargetBitmap doesn't seem to render my rectangle

I have the following code: LinearGradientBrush linGrBrush = new LinearGradientBrush(); linGrBrush.StartPoint = new Point(0,0); linGrBrush.EndPoint = new Point(1, 0); linGrBrush.GradientStops.Add(new…
Timothy Jones
  • 21,495
  • 6
  • 60
  • 90
3
votes
0 answers

Using RenderTargetBitmap with a Viewport3D

I use Viewport3d and display my 3D Elements with inherited UIElement3D classes... Now I want to make different images of my viewport (different views). That means I have to make a new viewport3d at runtime and apply my specific view for the image on…
Roland
  • 97
  • 1
  • 8
3
votes
2 answers

RenderTargetBitmap position issues

Objective Take a screenshot of a control (or a set of controls) using RenderTargetBitmap. Source:
3
votes
0 answers

RenderTargetBitmap : Impossible to free/dispose handle

Sorry for my bad english. I want to render a DrawingVisual to a bitmap so I can create a DiffuseMaterial. I do this: public DiffuseMaterial GetDiffuseMaterial(string text, string font, double fontSize, Brush brush) { FormattedText formattedText…
steacker
  • 127
  • 1
  • 10
3
votes
2 answers

How do you capture current frame from a MediaElement in WinRT (8.1)?

I am trying to implement a screenshot functionality in a WinRT app that shows Video via a MediaElement. I have the following code, it saves a screenshot that's the size of the MediaElement but the image is empty (completely black). Tried with…
sumitkm
  • 733
  • 6
  • 29
2
votes
2 answers

How can I draw a Polyline onto an Image (WPF)

I've tried a few different approaches to this, but can't seem to get a combination that works. Creating WPF app in C#, Visual Studio. System.Windows.Shapes.Polyline works really nicely to draw into a Canvas in real-time, but I want to be able to…
xtempore
  • 5,260
  • 4
  • 36
  • 43
2
votes
1 answer

WPF texbox focus when render to offscreen buffer

i am rendering a textbox to an offscreen buffer using RenderTargetBitmap and i want to enter text into this textbox, however, i can't set the textbox focus (using Focus() has no effect - presumably because the canvas is not attached to a real…
morishuz
  • 2,302
  • 4
  • 21
  • 21
2
votes
0 answers

How to render offscreen content with RenderTargetBitmap in UWP?

I'm trying to render the contents of a UserControl to frames the create a video in 1080p, so I created a set the size to my control accordingly: RenderControl.Width = 1920; RenderControl.Height = 1080; After setting the size, I execute this…
SuperJMN
  • 13,110
  • 16
  • 86
  • 185
2
votes
1 answer

WPF RenderTargetBitmap downscaling TextRenderMode to GreyScale

RenderTargetBitmap removes downgrades a RichtextBox's TextRenderingMode to GreyScale. So a captured PNG looks poor quality and doesnt match the WPF control If I use WINDOWS ALT+PRINT SCREEN, the text is captured perfectly. So how can I render the…
TommyGuns21
  • 259
  • 2
  • 9
2
votes
0 answers

HWA: instantiating RenderTargetBitmap throws RPC_E_WRONG_THREAD even in UI thread

I'm trying to use RenderTargetBitmap to get a screenshot of a Windows Hosted Web App (HWA) window, but I can't seem to instantiate it when handling a request from the Javascript web app running on the HWA app: public async Task…
Gehrard Raven
  • 21
  • 2
2
votes
1 answer

RenderTargetBitmap low image quality issue

I try to generate 300 dpi image using RenderTargetBitmap method. When I try to use RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(315, 195, 300, 300, PixelFormats.Pbgra32); Image gets extremly big. How to fix it? RenderTargetBitmap…
NoWar
  • 36,338
  • 80
  • 323
  • 498
1 2
3
…
8 9