private void ProcessFrame(DesktopFrame frame)
{
// Get the desktop capture texture
var mapSource = _mDevice.ImmediateContext.MapSubresource(_desktopImageTexture, 0, MapMode.Read,
MapFlags.None);
var bounds = (Rectangle)_mOutputDesc.DesktopBounds;
FinalImage = new Bitmap(bounds.Width, bounds.Height, PixelFormat.Format32bppArgb);
var boundsRect = new global::System.Drawing.Rectangle(0, 0, bounds.Width, bounds.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 (var y = 0; y < bounds.Height; y++)
{
// Copy a single line
Utilities.CopyMemory(destPtr, sourcePtr, bounds.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 = (Bitmap)FinalImage.Clone();
}
/// <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
var retrievalTimedOut = RetrieveFrame();
if (retrievalTimedOut)
{
return(null);
}
try
{
RetrieveFrameMetadata(frame);
//we don't need cursor info
//RetrieveCursorMetadata(frame);
//we dont need a full frame
//ProcessFrame(frame);
}
catch
{
ReleaseFrame();
}
try
{
ReleaseFrame();
}
catch
{
// throw new DesktopDuplicationException("Couldn't release frame.");
}
return(frame);
}
private void RetrieveFrameMetadata(DesktopFrame frame)
{
if (_frameInfo.TotalMetadataBufferSize > 0)
{
// Get moved regions
var movedRegionsLength = 0;
var movedRectangles = new OutputDuplicateMoveRectangle[_frameInfo.TotalMetadataBufferSize];
_mDeskDupl.GetFrameMoveRects(movedRectangles.Length, movedRectangles, out movedRegionsLength);
frame.MovedRegions =
new MovedRegion[movedRegionsLength / Marshal.SizeOf(typeof(OutputDuplicateMoveRectangle))];
for (var i = 0; i < frame.MovedRegions.Length; i++)
{
var destRect = (Rectangle)movedRectangles[i].DestinationRect;
frame.MovedRegions[i] = new MovedRegion
{
Source = new Point(movedRectangles[i].SourcePoint.X, movedRectangles[i].SourcePoint.Y),
Destination =
new global::System.Drawing.Rectangle(destRect.X, destRect.Y, destRect.Width, destRect.Height)
};
}
// Get dirty regions
var dirtyRegionsLength = 0;
var dirtyRectangles = new RawRectangle[_frameInfo.TotalMetadataBufferSize];
_mDeskDupl.GetFrameDirtyRects(dirtyRectangles.Length, dirtyRectangles, out dirtyRegionsLength);
frame.UpdatedRegions =
new global::System.Drawing.Rectangle[dirtyRegionsLength / Marshal.SizeOf(typeof(Rectangle))];
frame.FinishedRegions = new FinishedRegions[frame.UpdatedRegions.Length];
for (var i = 0; i < frame.UpdatedRegions.Length; i++)
{
var dirtyRect = (Rectangle)dirtyRectangles[i];
var rect = new global::System.Drawing.Rectangle(dirtyRect.X, dirtyRect.Y, dirtyRect.Width,
dirtyRect.Height);
frame.FinishedRegions[i] = new FinishedRegions
{
Destination = rect,
Frame = ExtractRect(rect.X, rect.Y, rect.Width, rect.Height)
};
}
}
else
{
frame.MovedRegions = new MovedRegion[0];
frame.UpdatedRegions = new global::System.Drawing.Rectangle[0];
}
}
