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 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 = 0;
Rectangle[] dirtyRectangles = new Rectangle[frameInfo.TotalMetadataBufferSize];
mDeskDupl.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 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 ProcessFrame(DesktopFrame frame)
{
// Get the desktop capture texture
var mapSource = mDevice.ImmediateContext.MapSubresource(desktopImageTexture, 0, MapMode.Read, MapFlags.None);
var Real_DesktopHeight = mOutputDesc.DesktopBounds.Height;
var Real_DesktopWidth = mOutputDesc.DesktopBounds.Width;
// var x = Real_DesktopHeight;
// Real_DesktopHeight = Real_DesktopWidth;
// Real_DesktopWidth = x;
Bitmap newImage;
if (!_allocatedBitmaps.TryDequeue(out newImage))
{
newImage = new Bitmap(Real_DesktopWidth, Real_DesktopHeight, PixelFormat.Format32bppRgb);
}
FinalImage = newImage;
var boundsRect = new System.Drawing.Rectangle(0, 0, Real_DesktopWidth, Real_DesktopHeight);
// 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 < Real_DesktopHeight; y++)
{
// Copy a single line
Utilities.CopyMemory(destPtr, sourcePtr, Real_DesktopWidth * 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;
}
