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DXViewRenderToBitmap(DXViewRenderedBitmapReadyDelegate, Int32, Int32, Int32, Int32, Double, Double, Boolean) Method

RenderToBitmap renders the 3D scene and then calls the specified renderedBitmapReadyCallback where user can copy rendered bitmap from the mapped GPU mapped memory to main memory. See remarks for a code sample for a OnRenderedBitmapReady method. See also other overrides of RenderToBitmap method: RenderToBitmap, RenderToBitmap(Int32, Int32, Int32, Int32, Boolean), RenderToBitmap(Int32, Int32, Int32, Double, Double), RenderToBitmap(Int32, Int32, Int32, Int32, Double, Double, Boolean).

Namespace: Ab3d.DirectX.Controls
Assembly: Ab3d.DXEngine.Wpf (in Ab3d.DXEngine.Wpf.dll) Version: 7.0.8865.1045
Syntax
C#
Copy
public void RenderToBitmap(
	DXViewRenderedBitmapReadyDelegate renderedBitmapReadyCallback,
	int width = -1,
	int height = -1,
	int preferedMultisampling = -1,
	int supersamplingCount = 1,
	double dpiX = 96,
	double dpiY = 96,
	bool convertToNonPreMultipledAlpha = false
)

Parameters

renderedBitmapReadyCallback  DXViewRenderedBitmapReadyDelegate
RenderedBitmapReadyDelegate delegate that is called when the rendered bitmap is ready to be copied from GPU mapped memory to main memory
width  Int32  (Optional)
width of the rendered bitmap (when -1; by default) then the width of the current DXScene is used
height  Int32  (Optional)
height of the rendered bitmap (when -1; by default) then the height of the current DXScene is used
preferedMultisampling  Int32  (Optional)
multisampling count that is used to render the image (used if possible). When -1 is specified (by default), then the current multisampling count from DXScene is used.
supersamplingCount  Int32  (Optional)
super-sampling count (possible values: 1 no super-sampling, 4, 16, 64)
dpiX  Double  (Optional)
The horizontal DPI of the bitmap.
dpiY  Double  (Optional)
The vertical DPI of the bitmap.
convertToNonPreMultipledAlpha  Boolean  (Optional)
when true (false by default) then the image in converted into non-premultiplied alpha (this can be used when saving to png file that does not support pre-multiplied alpha)
Remarks
Example
The following code show a possible code for OnRenderedBitmapReady method that is used for the renderedBitmapReadyCallback delegate
C#
Copy
private WriteableBitmap _writeableBitmap;

private void OnRenderedBitmapReady(int width, int height, DataBox data)
{
    // If size has changed, then we do not need existing WriteableBitmap anymore
    if (_writeableBitmap != null &&
        (_writeableBitmap.PixelWidth != width || _writeableBitmap.PixelHeight != height))
    {
        _writeableBitmap = null;
    }

    if (_writeableBitmap == null)
        _writeableBitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Pbgra32, null);


    _writeableBitmap.Lock();

    var viewportRect = new Int32Rect(0, 0, width, height);

    // Copy bitmap from e.Data.DataPointer to writeableBitmap
    _writeableBitmap.WritePixels(viewportRect, data.DataPointer, data.SlicePitch, data.RowPitch);

    _writeableBitmap.AddDirtyRect(viewportRect);
    _writeableBitmap.Unlock();
}
See Also