private void ProcessFrame(DesktopFrame frame)
{
// Get the desktop capture texture
var mapSource = mDevice.ImmediateContext.MapSubresource(desktopImageTexture, 0, MapMode.Read, MapFlags.None);
FinalImage = new Bitmap(mOutputDesc.DesktopBounds.Width, mOutputDesc.DesktopBounds.Height, PixelFormat.Format32bppRgb);
var boundsRect = new Rectangle(0, 0, mOutputDesc.DesktopBounds.Width, mOutputDesc.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 < mOutputDesc.DesktopBounds.Height; y++)
{
// Copy a single line
Utilities.CopyMemory(destPtr, sourcePtr, mOutputDesc.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);
mDevice.ImmediateContext.UnmapSubresource(desktopImageTexture, 0);
frame.DesktopImage = FinalImage;
}
private void RetrieveFrameMetadata(DesktopFrame frame)
{
if (frameInfo.TotalMetadataBufferSize > 0)
{
// Get moved regions
int movedRegionsLength = 0;
OutputDuplicateMoveRectangle[] movedRectangles = new OutputDuplicateMoveRectangle[frameInfo.TotalMetadataBufferSize];
mDeskDupl.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 Point(movedRectangles[i].SourcePoint.X, movedRectangles[i].SourcePoint.Y),
Destination = new Rectangle(movedRectangles[i].DestinationRect.X, movedRectangles[i].DestinationRect.Y, movedRectangles[i].DestinationRect.Width, movedRectangles[i].DestinationRect.Height)
};
}
// Get dirty regions
int dirtyRegionsLength = 0;
SharpDX.Rectangle[] dirtyRectangles = new SharpDX.Rectangle[frameInfo.TotalMetadataBufferSize];
mDeskDupl.GetFrameDirtyRects(dirtyRectangles.Length, dirtyRectangles, out dirtyRegionsLength);
frame.UpdatedRegions = new Rectangle[dirtyRegionsLength / Marshal.SizeOf(typeof(SharpDX.Rectangle))];
for (int i = 0; i < frame.UpdatedRegions.Length; i++)
{
frame.UpdatedRegions[i] = new Rectangle(dirtyRectangles[i].X, dirtyRectangles[i].Y, dirtyRectangles[i].Width, dirtyRectangles[i].Height);
}
}
else
{
frame.MovedRegions = new MovedRegion[0];
frame.UpdatedRegions = new 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 retrievalTimedOut = RetrieveFrame();
if (retrievalTimedOut)
{
return(null);
}
try
{
RetrieveFrameMetadata(frame);
RetrieveCursorMetadata(frame);
ProcessFrame(frame);
}
catch
{
ReleaseFrame();
}
try
{
ReleaseFrame();
}
catch
{
// throw new DesktopDuplicationException("Couldn't release frame.");
}
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)
{
mDeskDupl.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.");
}
}
//frame.CursorVisible = pointerInfo.Visible;
frame.CursorLocation = new Point(pointerInfo.Position.X, pointerInfo.Position.Y);
}
