public DesktopFrame()
{
PointerPosition = new PointerPosition();
PointerShape = new PointerShape();
}
public Task ObserveWithUnwaveringSight(ObservationRequest observerInfo, CancellationToken token)
{
if (observerInfo == null)
{
throw new ArgumentNullException(nameof(observerInfo));
}
var streamDesktopThumbnails = true;
if (observerInfo.StreamDesktopThumbnail.HasValue)
{
streamDesktopThumbnails = observerInfo.StreamDesktopThumbnail.Value;
}
var desktopThumbnailStreamSettings = new DesktopThumbnailStreamSettings();
if (observerInfo.DesktopThumbnailStreamSettings != null)
{
if (observerInfo.DesktopThumbnailStreamSettings.MaxFps.HasValue && observerInfo.DesktopThumbnailStreamSettings.MaxFps.Value > 0)
{
desktopThumbnailStreamSettings.MaxFps = observerInfo.DesktopThumbnailStreamSettings.MaxFps.Value;
}
if (observerInfo.DesktopThumbnailStreamSettings.ScaleFactor.HasValue && observerInfo.DesktopThumbnailStreamSettings.ScaleFactor.Value > 0)
{
desktopThumbnailStreamSettings.ScaleFactor = observerInfo.DesktopThumbnailStreamSettings.ScaleFactor.Value;
}
}
var streamPointerPosition = true;
if (observerInfo.StreamPointerPosition.HasValue)
{
streamPointerPosition = observerInfo.StreamPointerPosition.Value;
}
// Observe the screen on a seperate thread.
return(Task.Factory.StartNew(() =>
{
var duplicatorInstance = new DesktopDuplicator(_logger, observerInfo.AdapterIndex ?? 0, observerInfo.DeviceIndex ?? 0);
int?lastMatrixFrameIdSent = null;
DateTime?lastdesktopThumbnailSent = null;
PointerPosition lastPointerPosition = null;
int lastWidth = 0, lastHeight = 0;
_logger.LogInformation("The cold stare of the Beholder's unwavering glare is now focused upon the screen...");
//TODO: Process each frame on a separate thread -- we get a "Object is in use elsewhere" from the DesktopImage when we do this though.
foreach (var desktopFrame in duplicatorInstance.DuplicateDesktop(token))
{
if (token.IsCancellationRequested || desktopFrame == null || desktopFrame.DesktopWidth == 0 || desktopFrame.DesktopHeight == 0 || desktopFrame.IsDesktopImageBufferEmpty)
{
continue;
}
if (lastWidth != desktopFrame.DesktopWidth || lastHeight != desktopFrame.DesktopHeight)
{
NexusConnection?.SendAsync("EyeReport", "ScreenDimensions", new object[] { desktopFrame.DesktopWidth, desktopFrame.DesktopHeight });
lastWidth = desktopFrame.DesktopWidth;
lastHeight = desktopFrame.DesktopHeight;
}
if (streamDesktopThumbnails)
{
if (!lastdesktopThumbnailSent.HasValue || DateTime.Now.Subtract(lastdesktopThumbnailSent.Value) > TimeSpan.FromSeconds(desktopThumbnailStreamSettings.MaxFps.Value))
{
var width = (int)Math.Ceiling(desktopFrame.DesktopWidth * desktopThumbnailStreamSettings.ScaleFactor.Value);
var height = (int)Math.Ceiling(desktopFrame.DesktopHeight * desktopThumbnailStreamSettings.ScaleFactor.Value);
var thumbnailImage = desktopFrame.GetThumbnailImage(width, height);
var now = DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture);
var key = $"Eye_Thumb_{now}.png";
try
{
var db = Redis.GetDatabase();
db.StringSet(key, thumbnailImage, TimeSpan.FromSeconds(30));
NexusConnection?.SendAsync("EyeReport", "Thumbnail", new object[] { key, width, height });
}
catch (RedisException ex)
{
_logger.LogError(ex, $"Unable to store thumbnail in redis. {ex.Message}");
}
}
}
if (streamPointerPosition)
{
var newPointerPosition = desktopFrame.PointerPosition;
if (lastPointerPosition == null || (lastPointerPosition.X != newPointerPosition.X || lastPointerPosition.Y != newPointerPosition.Y || lastPointerPosition.Visible != newPointerPosition.Visible))
{
NexusConnection?.SendAsync("EyeReport", "PointerPosition", new object[] { newPointerPosition });
lastPointerPosition = newPointerPosition;
}
var pointerData = desktopFrame.GetPointerImage();
if (pointerData != null && lastPointerPosition.Visible.Value)
{
var hash = _hashAlgorithm.ComputeHash(pointerData);
var key = $"Eye_Pointer_{Convert.ToBase64String(hash)}.png";
try
{
var db = Redis.GetDatabase();
if (!db.KeyExists(key))
{
db.StringSet(key, pointerData);
}
}
catch (RedisException ex)
{
_logger.LogError(ex, $"Unable to store pointer in redis. {ex.Message}");
}
finally
{
NexusConnection?.SendAsync("EyeReport", "PointerShape", new object[] { desktopFrame.PointerShape, key });
}
}
}
// Double-check locking for a snapshot request.
if (SnapshotRequest != null)
{
lock (_snapshotLock)
{
if (SnapshotRequest != null)
{
if (SnapshotRequest.ScaleFactor.HasValue == false)
{
SnapshotRequest.ScaleFactor = 1.0;
}
if (SnapshotRequest.Format.HasValue == false)
{
SnapshotRequest.Format = SnapshotFormat.Png;
}
var width = (int)Math.Ceiling(desktopFrame.DesktopWidth * SnapshotRequest.ScaleFactor.Value);
var height = (int)Math.Ceiling(desktopFrame.DesktopHeight * SnapshotRequest.ScaleFactor.Value);
var snapshot = desktopFrame.GetSnapshot(width, height, SnapshotRequest.Format.Value);
var now = DateTime.UtcNow.ToString("o", CultureInfo.InvariantCulture);
var key = $"Eye_Snapshot_{now}";
switch (SnapshotRequest.Format)
{
case SnapshotFormat.Jpeg:
key += ".jpg";
break;
case SnapshotFormat.Png:
default:
key += ".png";
break;
}
try
{
var db = Redis.GetDatabase();
db.StringSet(key, snapshot, TimeSpan.FromHours(2));
if (SnapshotRequest.Metadata != null)
{
var metadataKey = $"Eye_Snapshot_Metadata_{now}";
db.StringSet(metadataKey, JsonSerializer.Serialize(SnapshotRequest.Metadata), TimeSpan.FromHours(2));
}
NexusConnection?.SendAsync("EyeReport", "Snapshot", new object[] { key, width, height });
}
catch (RedisException ex)
{
_logger.LogError(ex, $"Unable to store snapshot in redis. {ex.Message}");
}
// We've taken a snapshot, clear the request.
SnapshotRequest = null;
}
}
}
if (AlignRequest != null)
{
lock (_alignLock)
{
if (AlignRequest != null)
{
var pixelSize = 2;
if (AlignRequest.PixelSIze.HasValue && AlignRequest.PixelSIze.Value > 0)
{
pixelSize = AlignRequest.PixelSIze.Value;
}
var map = desktopFrame.GenerateAlignmentMap(pixelSize);
try
{
var db = Redis.GetDatabase();
db.StringSet(AlignmentMapKey, JsonSerializer.Serialize(map));
NexusConnection?.SendAsync("EyeReport", "AlignmentMapUpdated", new object[] { AlignmentMapKey });
}
catch (RedisException ex)
{
_logger.LogError(ex, $"Unable to store alignment maP in redis. {ex.Message}");
}
AlignRequest = null;
}
}
}
foreach (var region in observerInfo.Regions)
{
switch (region.Kind)
{
case ObservationRegionKind.MatrixFrame:
if (region.MatrixSettings == null)
{
//TODO: some sort of logging that won't generate a bunch of redundant data?
continue;
}
if (region.MatrixSettings.Map == null)
{
try
{
var db = Redis.GetDatabase();
var json = db.StringGet(AlignmentMapKey);
if (json.HasValue)
{
region.MatrixSettings.Map = JsonSerializer.Deserialize <IList <int> >(json);
}
}
catch (RedisException)
{
// Do Nothing
}
}
if (region.MatrixSettings.DataFormat == null)
{
region.MatrixSettings.DataFormat = DataMatrixFormat.MatrixEvents;
}
var matrixFrame = desktopFrame.DecodeMatrixFrame(region.MatrixSettings);
if (matrixFrame != null && lastMatrixFrameIdSent != matrixFrame.FrameId)
{
NexusConnection?.SendAsync("EyeReport", "MatrixFrame", new object[] { matrixFrame });
lastMatrixFrameIdSent = matrixFrame.FrameId;
}
break;
case ObservationRegionKind.Image:
default:
break;
}
}
}
;
_logger.LogInformation("The Beholder has focused its attention elsewhere.");
}, token, TaskCreationOptions.None, TaskScheduler.Default));
}