/// <summary>
/// ParameterizedThreadStart method that places the image data from the stream into a byte array and then sets the Interface screenshot response. This can be called asynchronously.
/// </summary>
/// <param name="param">An instance of RetrieveImageDataParams is required to be passed as the parameter.</param>
/// <remarks>The stream object passed will be closed!</remarks>
void RetrieveImageData(object param)
{
RetrieveImageDataParams retrieveParams = (RetrieveImageDataParams)param;
try
{
SendResponse(retrieveParams.Stream, retrieveParams.RequestId);
}
finally
{
retrieveParams.Stream.Close();
}
}
/// <summary>
/// Copies the _renderTarget surface into a stream and starts a new thread to send the data back to the host process
/// </summary>
void ProcessRequest()
{
if (Request != null)
{
// SlimDX now uses a marshal_as for Rectangle to RECT that correctly does the conversion for us, therefore no need
// to adjust the region Width/Height to fit the x1,y1,x2,y2 format.
//Rectangle region = Request.RegionToCapture;
// Prepare the parameters for RetrieveImageData to be called in a separate thread.
RetrieveImageDataParams retrieveParams = new RetrieveImageDataParams();
// After the Stream is created we are now finished with _renderTarget and have our own separate copy of the data,
// therefore it will now be safe to begin a new thread to complete processing.
// Note: RetrieveImageData will take care of closing the stream.
// Note 2: Surface.ToStream is the slowest part of the screen capture process - the other methods
// available to us at this point are _renderTarget.GetDC(), and _renderTarget.LockRectangle/UnlockRectangle
//if (Request.RegionToCapture.Width == 0)
//{
// // The width is 0 so lets grab the entire window
// retrieveParams.Stream = Surface.ToStream(_renderTarget, ImageFileFormat.Bmp);
//}
//else if (Request.RegionToCapture.Height > 0)
//{
// retrieveParams.Stream = Surface.ToStream(_renderTarget, ImageFileFormat.Bmp, region);
//}
//if (retrieveParams.Stream != null)
//{
// _screenshotRequest will most probably be null by the time RetrieveImageData is executed
// in a new thread, therefore we must provide the RequestId separately.
retrieveParams.RequestId = Request.RequestId;
retrieveParams.FileName = Request.FileName;
// Begin a new thread to process the image data and send the request result back to the host application
Thread t = new Thread(new ParameterizedThreadStart(RetrieveImageData));
t.Start(retrieveParams);
//}
}
}
/// <summary>
/// Copies the _renderTarget surface into a stream and starts a new thread to send the data back to the host process
/// </summary>
void ProcessRequest()
{
if (Request != null)
{
// SlimDX now uses a marshal_as for Rectangle to RECT that correctly does the conversion for us, therefore no need
// to adjust the region Width/Height to fit the x1,y1,x2,y2 format.
Rectangle region = Request.RegionToCapture;
// Prepare the parameters for RetrieveImageData to be called in a separate thread.
RetrieveImageDataParams retrieveParams = new RetrieveImageDataParams();
// After the Stream is created we are now finished with _renderTarget and have our own separate copy of the data,
// therefore it will now be safe to begin a new thread to complete processing.
// Note: RetrieveImageData will take care of closing the stream.
// Note 2: Surface.ToStream is the slowest part of the screen capture process - the other methods
// available to us at this point are _renderTarget.GetDC(), and _renderTarget.LockRectangle/UnlockRectangle
if (Request.RegionToCapture.Width == 0)
{
// The width is 0 so lets grab the entire window
retrieveParams.Stream = Surface.ToStream(_renderTarget, ImageFileFormat.Bmp);
}
else if (Request.RegionToCapture.Height > 0)
{
retrieveParams.Stream = Surface.ToStream(_renderTarget, ImageFileFormat.Bmp, region);
}
if (retrieveParams.Stream != null)
{
// _screenshotRequest will most probably be null by the time RetrieveImageData is executed
// in a new thread, therefore we must provide the RequestId separately.
retrieveParams.RequestId = Request.RequestId;
// Begin a new thread to process the image data and send the request result back to the host application
Thread t = new Thread(new ParameterizedThreadStart(RetrieveImageData));
t.Start(retrieveParams);
}
}
}
