/// <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);
}
/// <summary>
/// Indicates that the application is ready to process the next desktop image.
/// </summary>
/// <param name="timeoutInMilliseconds">
/// The time-out interval, in milliseconds. This interval specifies the amount of time that this method waits for a new
/// frame before it returns to the caller. This method returns if the interval elapses, and a new desktop image is not
/// available.
/// For more information about the time-out interval, see Remarks.
/// </param>
/// <param name="frameInfo">
/// A out variable that receives the <seealso cref="DXGIOutDuplFrameInfo" />
/// structure that describes timing and presentation statistics for a frame.
/// </param>
/// <param name="desktopResource">
/// A out variable that receives the <seealso cref="IDXGIResource" /> interface of
/// the surface that contains the desktop bitmap.
/// </param>
/// <returns></returns>
/// <remarks>
/// When AcquireNextFrame returns successfully, the calling application can access the desktop image that
/// <seealso cref="IDXGIOutputDuplication.AcquireNextFrame" /> returns in the variable at
/// <paramref name="desktopResource" />. If the caller
/// specifies a zero time-out interval in
/// the <paramref name="timeoutInMilliseconds" /> parameter, <seealso cref="IDXGIOutputDuplication.AcquireNextFrame" />
/// verifies whether there
/// is a new desktop image available,
/// returns immediately, and indicates its outcome with the return value. If the caller specifies an INFINITE time-out
/// interval in the <paramref name="timeoutInMilliseconds" /> parameter, the time-out interval never elapses.
/// <b>
/// Note: You cannot cancel the wait that you specified in the <paramref name="timeoutInMilliseconds" /> parameter.
/// Therefore, if you
/// must periodically check for other conditions (for example, a terminate signal), you should specify a
/// non-INFINITE time-out interval. After the time-out interval elapses, you can check for these other conditions
/// and then call <seealso cref="IDXGIOutputDuplication.AcquireNextFrame" /> again to wait for the next frame.
/// </b>
/// <seealso cref="IDXGIOutputDuplication.AcquireNextFrame" /> acquires a new desktop frame when the operating system
/// either updates the
/// desktop bitmap image or
/// changes the shape or position of a hardware pointer. The new frame that
/// <seealso cref="IDXGIOutputDuplication.AcquireNextFrame" />
/// acquires might have only
/// the desktop image updated, only the pointer shape or position updated, or both.
/// </remarks>
public int AcquireNextFrame(uint timeoutInMilliseconds, out DXGIOutDuplFrameInfo frameInfo,
out IDXGIResource desktopResource)
{
int result = GetMethodDelegate <DXGIAcquireNextFrameDelegate>()
.Invoke(this, timeoutInMilliseconds, out frameInfo, out IntPtr resourcePtr);
desktopResource = result == 0 ? new DXGIResource(resourcePtr) : null;
return(result);
}
public IDXGIDecodeSwapChain CreateDecodeSwapChainForCompositionSurfaceHandle(
IUnknown device,
IntPtr surface,
IDXGIResource yuvDecodeBuffers)
{
// Reserved for future use (https://docs.microsoft.com/it-it/windows/desktop/api/dxgi1_3/ns-dxgi1_3-dxgi_decode_swap_chain_desc)
var description = new DecodeSwapChainDescription
{
Flags = 0
};
return(CreateDecodeSwapChainForCompositionSurfaceHandle(device, surface, description, yuvDecodeBuffers, null));
}
public IDXGIDecodeSwapChain CreateDecodeSwapChainForCompositionSurfaceHandle(
IUnknown device,
IntPtr surface,
IDXGIResource yuvDecodeBuffers)
{
Guard.NotNull(device, nameof(device));
Guard.IsTrue(surface != IntPtr.Zero, nameof(surface), "Invalid surface handle");
Guard.NotNull(yuvDecodeBuffers, nameof(yuvDecodeBuffers));
// Reserved for future use (https://docs.microsoft.com/it-it/windows/desktop/api/dxgi1_3/ns-dxgi1_3-dxgi_decode_swap_chain_desc)
var description = new DecodeSwapChainDescription
{
Flags = 0
};
return(CreateDecodeSwapChainForCompositionSurfaceHandle(device, surface, description, yuvDecodeBuffers, null));
}
