wpf 将 RenderTargetBitmap 转换为 Bitmap
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Convert RenderTargetBitmap to Bitmap
提问by MC9000
This looks like a dup question, it is, but no one has answered the actual question(s).
这看起来像一个重复的问题，但没有人回答实际问题。
Here goes:
Basically, I'm rendering a ViewPort3D as a 2D snapshot in code, but need to convert that type
RenderTargetBitmapinto the type System.Drawing.Bitmap(for further processing on the 2D side).
这是：基本上，我在代码中将 ViewPort3D 渲染为 2D 快照，但需要将该类型
RenderTargetBitmap转换为该类型System.Drawing.Bitmap（以便在 2D 端进行进一步处理）。
Dim bmpRen As New RenderTargetBitmap(1024, 550, 96, 96, PixelFormats.Pbgra32)
bmpRen.Render(Me.vp3dTiles) 'render the viewport as 2D snapshot
While I know how to save it to a file, I'd rather skip that step and convert the bmpRento a System.Drawing.Bitmaptype, but there is no method to do so.
虽然我知道如何将其保存到文件中，但我宁愿跳过该步骤并将其转换bmpRen为System.Drawing.Bitmap类型，但没有方法可以这样做。
回答by PocketDews
RenderedTargetBitmapis a BitmapSource, so the BmpBitmapEncodercan do the conversion for us:
RenderedTargetBitmap是 a BitmapSource，所以BmpBitmapEncoder可以为我们做转换：
This is in C#, but it should translate to VB without any problems.
这是在 C# 中，但它应该可以毫无问题地转换为 VB。
RenderTargetBitmap bmpRen = new RenderTargetBitmap(1024, 550, 96, 96, PixelFormats.Pbgra32);
bmpRen.Render(vp3dTiles);
MemoryStream stream = new MemoryStream();
BitmapEncoder encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmpRen));
encoder.Save(stream);
Bitmap bitmap = new Bitmap(stream);
