private void ProcessFrame(DesktopFrame frame)
{
// Get the desktop capture texture
var mapSource = _device.ImmediateContext.MapSubresource(_desktopImageTexture, 0, MapMode.Read, MapFlags.None);
FinalImage = new Bitmap(_outputDescription.DesktopBounds.Width, _outputDescription.DesktopBounds.Height, PixelFormat.Format32bppRgb);
var boundsRect = new System.Drawing.Rectangle(0, 0, _outputDescription.DesktopBounds.Width, _outputDescription.DesktopBounds.Height);
// Copy pixels from screen capture Texture to GDI bitmap
var mapDest = FinalImage.LockBits(boundsRect, ImageLockMode.WriteOnly, FinalImage.PixelFormat);
var sourcePtr = mapSource.DataPointer;
var destPtr = mapDest.Scan0;
for (int y = 0; y < _outputDescription.DesktopBounds.Height; y++)
{
// Copy a single line
Utilities.CopyMemory(destPtr, sourcePtr, _outputDescription.DesktopBounds.Width * 4);
// Advance pointers
sourcePtr = IntPtr.Add(sourcePtr, mapSource.RowPitch);
destPtr = IntPtr.Add(destPtr, mapDest.Stride);
}
// Release source and dest locks
FinalImage.UnlockBits(mapDest);
_device.ImmediateContext.UnmapSubresource(_desktopImageTexture, 0);
frame.DesktopImage = FinalImage;
}
private void RetrieveFrameMetadata(DesktopFrame frame)
{
if (_frameInfo.TotalMetadataBufferSize > 0)
{
// Get moved regions
int movedRegionsLength;
OutputDuplicateMoveRectangle[] movedRectangles = new OutputDuplicateMoveRectangle[_frameInfo.TotalMetadataBufferSize];
_outputDuplication.GetFrameMoveRects(movedRectangles.Length, movedRectangles, out movedRegionsLength);
frame.MovedRegions = new MovedRegion[movedRegionsLength / Marshal.SizeOf(typeof(OutputDuplicateMoveRectangle))];
for (int i = 0; i < frame.MovedRegions.Length; i++)
{
frame.MovedRegions[i] = new MovedRegion()
{
Source = new System.Drawing.Point(movedRectangles[i].SourcePoint.X, movedRectangles[i].SourcePoint.Y),
Destination = new System.Drawing.Rectangle(movedRectangles[i].DestinationRect.X, movedRectangles[i].DestinationRect.Y, movedRectangles[i].DestinationRect.Width, movedRectangles[i].DestinationRect.Height)
};
}
// Get dirty regions
int dirtyRegionsLength;
Rectangle[] dirtyRectangles = new Rectangle[_frameInfo.TotalMetadataBufferSize];
_outputDuplication.GetFrameDirtyRects(dirtyRectangles.Length, dirtyRectangles, out dirtyRegionsLength);
frame.UpdatedRegions = new System.Drawing.Rectangle[dirtyRegionsLength / Marshal.SizeOf(typeof(Rectangle))];
for (int i = 0; i < frame.UpdatedRegions.Length; i++)
{
frame.UpdatedRegions[i] = new System.Drawing.Rectangle(dirtyRectangles[i].X, dirtyRectangles[i].Y, dirtyRectangles[i].Width, dirtyRectangles[i].Height);
}
}
else
{
frame.MovedRegions = new MovedRegion[0];
frame.UpdatedRegions = new System.Drawing.Rectangle[0];
}
}
/// <summary>
/// Retrieves the latest desktop image and associated metadata.
/// </summary>
public DesktopFrame GetLatestFrame()
{
var frame = new DesktopFrame();
// Try to get the latest frame; this may timeout
bool succeeded = RetrieveFrame();
if (!succeeded)
{
return(null);
}
try
{
RetrieveFrameMetadata(frame);
RetrieveCursorMetadata(frame);
ProcessFrame(frame);
}
finally
{
try
{
ReleaseFrame();
}
catch
{
//ignored
}
}
return(frame);
}
private void RetrieveCursorMetadata(DesktopFrame frame)
{
//var pointerInfo = new PointerInfo();
//// A non-zero mouse update timestamp indicates that there is a mouse position update and optionally a shape change
//if (_frameInfo.LastMouseUpdateTime == 0)
// return;
//bool updatePosition = true;
//// Make sure we don't update pointer position wrongly
//// If pointer is invisible, make sure we did not get an update from another output that the last time that said pointer
//// was visible, if so, don't set it to invisible or update.
//if (!_frameInfo.PointerPosition.Visible && (pointerInfo.WhoUpdatedPositionLast != _mWhichOutputDevice))
// updatePosition = false;
//// If two outputs both say they have a visible, only update if new update has newer timestamp
//if (_frameInfo.PointerPosition.Visible && pointerInfo.Visible && (pointerInfo.WhoUpdatedPositionLast != _mWhichOutputDevice) && (pointerInfo.LastTimeStamp > _frameInfo.LastMouseUpdateTime))
// updatePosition = false;
//// Update position
//if (updatePosition)
//{
// pointerInfo.Position = new SharpDX.Point(_frameInfo.PointerPosition.Position.X, _frameInfo.PointerPosition.Position.Y);
// pointerInfo.WhoUpdatedPositionLast = _mWhichOutputDevice;
// pointerInfo.LastTimeStamp = _frameInfo.LastMouseUpdateTime;
// pointerInfo.Visible = _frameInfo.PointerPosition.Visible;
//}
//// No new shape
//if (_frameInfo.PointerShapeBufferSize == 0)
// return;
//if (_frameInfo.PointerShapeBufferSize > pointerInfo.BufferSize)
//{
// pointerInfo.PtrShapeBuffer = new byte[_frameInfo.PointerShapeBufferSize];
// pointerInfo.BufferSize = _frameInfo.PointerShapeBufferSize;
//}
//try
//{
// unsafe
// {
// fixed (byte* ptrShapeBufferPtr = pointerInfo.PtrShapeBuffer)
// {
// _outputDuplication.GetFramePointerShape(_frameInfo.PointerShapeBufferSize, (IntPtr)ptrShapeBufferPtr, out pointerInfo.BufferSize, out pointerInfo.ShapeInfo);
// }
// }
//}
//catch (SharpDXException ex)
//{
// if (ex.ResultCode.Failure)
// {
// throw new DesktopDuplicationException("Failed to get frame pointer shape.");
// }
//}
}