/// <summary>
/// The main render loop callback that is cached in a delegate and is invoked to process main game loop.
/// </summary>
private void RenderLoopCallback()
{
if (Exiting)
{
CompositionTarget.Rendering -= OnCompositionTargetRendering;
if (element != null)
{
element.Game = null;
element = null;
}
presenter.Dispose();
return;
}
// run render loop once
RunCallback();
// mark completion of drawing operations
deviceContext.End(queryForCompletion);
// wait until drawing completes
Bool completed;
while (!(deviceContext.GetData(queryForCompletion, out completed) &&
completed))
{
Thread.Yield();
}
// syncronize D3D surface with WPF
image.InvalidateRendering();
}
/// <summary>
/// Request a screenshot and save it to disc.
/// </summary>
/// <param name="game">The game.</param>
/// <param name="screenShotUrl">The screenshot URL.</param>
/// <param name="width">The width.</param>
/// <param name="height">The height.</param>
/// <param name="pixelFormat">The pixel format.</param>
/// <param name="depthBufferFormat">The depth buffer format.</param>
/// <param name="fileType">Type of the file.</param>
/// <returns>
/// True on success
/// </returns>
public static bool SaveScreenshot(GameBase game, string screenshotUrl, int width, int height, PixelFormat pixelFormat = PixelFormat.R8G8B8A8_UNorm, PixelFormat depthBufferFormat = PixelFormat.D24_UNorm_S8_UInt, ImageFileType fileType = ImageFileType.Png)
{
var status = true;
var graphicsContext = game.GraphicsContext;
var graphicsDevice = game.GraphicsDevice;
var commandList = graphicsContext.CommandList;
var gameSystems = game.GameSystems;
var drawTime = game.DrawTime;
var previousPresenter = graphicsDevice.Presenter;
try
{
// set the master output
var renderTarget = graphicsContext.Allocator.GetTemporaryTexture2D(width, height, pixelFormat, TextureFlags.ShaderResource | TextureFlags.RenderTarget);
var depthStencil = graphicsContext.Allocator.GetTemporaryTexture2D(width, height, depthBufferFormat, TextureFlags.DepthStencil);
var tempPresenter = new RenderTargetGraphicsPresenter(graphicsDevice, renderTarget, depthStencil.ViewFormat);
try
{
// temp presenter
graphicsDevice.Presenter = tempPresenter;
// Always clear the state of the GraphicsDevice to make sure a scene doesn't start with a wrong setup
commandList.ClearState();
// render the screenshot
graphicsContext.ResourceGroupAllocator.Reset(graphicsContext.CommandList);
gameSystems.Draw(drawTime);
// write the screenshot to the file
renderTarget.SaveTexture(commandList, screenshotUrl, fileType);
}
finally
{
// Cleanup
graphicsDevice.Presenter = previousPresenter;
tempPresenter.Dispose();
graphicsContext.Allocator.ReleaseReference(depthStencil);
graphicsContext.Allocator.ReleaseReference(renderTarget);
}
}
catch (Exception e)
{
status = false;
}
return(status);
}