/// <summary>
/// Retrieves the next frame and copies the texture into the _desktopImageTexture.
/// </summary>
/// <param name="frameInformation"></param>
/// <returns></returns>
public bool TryRetrieveFrame(out OutduplFrameInfo frameInformation)
{
IDXGIResource desktopResource = null;
try
{
_outputDuplication.AcquireNextFrame(100, out frameInformation, out desktopResource);
using var tempTexture = desktopResource.QueryInterface <ID3D11Texture2D>();
_d3dDevice.ImmediateContext.CopyResource(_desktopImageTexture, tempTexture);
return(true);
}
catch (SharpGenException ex)
{
if (ex.ResultCode.Failure && ex.Descriptor.NativeApiCode != "DXGI_ERROR_ACCESS_LOST" && ex.Descriptor.NativeApiCode != "DXGI_ERROR_WAIT_TIMEOUT")
{
throw new DesktopDuplicationException("Failed to acquire next frame.");
}
}
finally
{
if (desktopResource != null)
{
desktopResource.Dispose();
}
}
frameInformation = new OutduplFrameInfo();
return(false);
}
public override void Update(double deltaTime)
{
IDXGIResource screenResource;
OutduplFrameInfo frameInfo;
try
{
if (release)
{
duplication.ReleaseFrame();
release = false;
}
duplication.AcquireNextFrame(500, out frameInfo, out screenResource);
using (var tempTexture = screenResource.QueryInterface <ID3D11Texture2D>())
device.ImmediateContext.CopySubresourceRegion(smallerTexture, 0, 0, 0, 0, tempTexture, 0);
device.ImmediateContext.GenerateMips(smallerTextureView);
device.ImmediateContext.CopySubresourceRegion(stagingTexture, 0, 0, 0, 0, smallerTexture, 1);
var dataBox = device.ImmediateContext.Map(stagingTexture, 0, MapMode.Read, Vortice.Direct3D11.MapFlags.None);
ProcessDataIntoSKPixmap(dataBox);
device.ImmediateContext.Unmap(stagingTexture, 0);
screenResource.Dispose();
release = true;
//duplication.ReleaseFrame();
}
catch (SharpGen.Runtime.SharpGenException e)
{
if (e.ResultCode == Vortice.DXGI.ResultCode.AccessLost)
{
StartDesktopDuplicator(0, 0);
}
else if (e.ResultCode == Vortice.DXGI.ResultCode.WaitTimeout)
{
//ignore
}
else
{
}
//throw;
}
}