private void OnGraphicsDeviceResetting(object sender, EventArgs eventArgs)
{
RenderTargetPool.Clear();
// Reset the texture stages. If a floating point texture is set, we get exceptions
// when a sampler with bilinear filtering is set.
GraphicsDevice.ResetTextures();
}
//private void OnGraphicsDeviceReset(object sender, EventArgs eventArgs)
//{
//}
private void OnGraphicsDeviceDisposing(object sender, EventArgs eventArgs)
{
// Clean up resources.
RenderTargetPool.Clear();
// Dispose custom data. - Don't do this. Because the device will be
// reset and automatically recreated when the game window moves between
// screens for example...
//foreach(var entry in Data)
// if (entry.Value is IDisposable)
// ((IDisposable)entry.Value).Dispose();
}
/// <summary>
/// Releases the unmanaged resources used by an instance of the <see cref="GraphicsManager"/> class
/// and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">
/// <see langword="true"/> to release both managed and unmanaged resources;
/// <see langword="false"/> to release only unmanaged resources.
/// </param>
protected virtual void Dispose(bool disposing)
{
if (!IsDisposed)
{
if (disposing)
{
RenderTargetPool.Dispose();
ShapeMeshCache.Dispose();
}
IsDisposed = true;
}
}
/// <summary>
/// Updates the graphics service and the registered graphics screens.
/// </summary>
/// <param name="deltaTime">The elapsed time since the last update.</param>
/// <remarks>
/// <para>
/// This methods
/// </para>
/// <list type="bullet">
/// <item>updates <see cref="DeltaTime"/>,</item>
/// <item>increments <see cref="Frame"/>,</item>
/// <item>
/// updates the graphics screens, i.e. calls <see cref="GraphicsScreen.Update"/> of all graphics
/// screens registered in the <see cref="Screens"/> collection
/// </item>
/// <item>and performs other internal tasks.</item>
/// </list>
/// <para>
/// This method needs to be called once per frame before calling <see cref="Render(bool)"/>.
/// </para>
/// </remarks>
public void Update(TimeSpan deltaTime)
{
ThrowIfDisposed();
if (_context == null)
_context = CreateRenderContext();
DeltaTime = deltaTime;
Time += deltaTime;
_context.DeltaTime = deltaTime;
_context.Time = Time;
Frame = (Frame < int.MaxValue) ? Frame + 1 : 0;
_context.Frame = Frame;
try
{
// Create temporary list because original collection may be modified during update.
CopyScreens(Screens, _tempScreens);
// Update graphics screens.
int numberOfScreens = _tempScreens.Count;
for (int i = numberOfScreens - 1; i >= 0; i--)
{
var screen = _tempScreens[i];
screen.Update(deltaTime);
if (screen.IsVisible
&& screen.Coverage == GraphicsScreenCoverage.Full
&& !screen.RenderPreviousScreensToTexture)
{
// The current screen occludes all screens in the background.
break;
}
}
RenderTargetPool.Update();
ShapeMeshCache.Update();
}
finally
{
// If GraphicsScreen.Update() throws, let's at least clear _tempScreens, so we can try again
// in the next frame.
_tempScreens.Clear();
}
}
public GraphicsManager(GraphicsDevice graphicsDevice, GameWindow gameWindow, ContentManager content)
{
if (graphicsDevice == null)
throw new ArgumentNullException("graphicsDevice");
if (content == null)
throw new ArgumentNullException("content");
GraphicsDevice = graphicsDevice;
graphicsDevice.DeviceResetting += OnGraphicsDeviceResetting;
//graphicsDevice.DeviceReset += OnGraphicsDeviceReset;
GraphicsDevice.Disposing += OnGraphicsDeviceDisposing;
Content = content;
RenderTargetPool = new RenderTargetPool(this);
Screens = new GraphicsScreenCollection();
if (gameWindow != null)
GameForm = PlatformHelper.GetForm(gameWindow.Handle);
PresentationTargets = new PresentationTargetCollection();
PresentationTargets.CollectionChanged += OnPresentationTargetsChanged;
EffectInterpreters = new EffectInterpreterCollection
{
new StockEffectInterpreter(),
new DefaultEffectInterpreter(),
new SceneEffectInterpreter(),
new TerrainEffectInterpreter(),
new Dxsas08EffectInterpreter(),
};
EffectBinders = new EffectBinderCollection
{
new StockEffectBinder(),
new DefaultEffectBinder(this),
new SceneEffectBinder(),
new TerrainEffectBinder(),
};
Data = new Dictionary<string, object>();
Frame = -1;
ShapeMeshCache = new ShapeMeshCache(this);
}
/// <summary>
/// Renders all visible <see cref="GraphicsScreen" />s.
/// </summary>
/// <param name="screens">The graphics screens.</param>
private void RenderScreens(IList<GraphicsScreen> screens)
{
if (GraphicsDevice == null || GraphicsDevice.IsDisposed)
return;
// Create temporary list because original collection may be modified during update.
try
{
CopyScreens(screens, _tempScreens);
// ----- Render screens from back to front.
var finalViewport = _context.Viewport;
var finalRenderTarget = _context.RenderTarget;
GraphicsScreen screenThatRequiresSourceTexture = null; // The next screen that needs the previous screens as source.
int numberOfScreens = _tempScreens.Count;
for (int i = GetIndexOfFirstVisibleScreen(_tempScreens); i < numberOfScreens; i++)
{
var screen = _tempScreens[i];
if (screen == screenThatRequiresSourceTexture)
{
Debug.Assert(_context.RenderTarget != null, "Previous graphics screens should have been rendered into an off-screen render target.");
Debug.Assert(_context.SourceTexture == null, "The RenderContext.SourceTexture should have been recycled.");
_context.SourceTexture = _context.RenderTarget;
_context.RenderTarget = finalRenderTarget;
screenThatRequiresSourceTexture = null;
}
if (screenThatRequiresSourceTexture == null)
{
// Check if one of the next screens needs the current output in an off-screen render target.
for (int j = i + 1; j < numberOfScreens; j++)
{
var topScreen = _tempScreens[j];
if (topScreen.IsVisible && topScreen.RenderPreviousScreensToTexture)
{
screenThatRequiresSourceTexture = topScreen;
var format = topScreen.SourceTextureFormat;
// If not specified, choose default values for width and height.
if (!format.Width.HasValue)
format.Width = finalViewport.Width;
if (!format.Height.HasValue)
format.Height = finalViewport.Height;
_context.RenderTarget = RenderTargetPool.Obtain2D(format);
break;
}
}
}
GraphicsDevice.SetRenderTarget(_context.RenderTarget);
// For the back buffer we use the special viewport. Off-screen render targets
// always use the full size.
if (_context.RenderTarget == finalRenderTarget)
GraphicsDevice.Viewport = finalViewport;
// Make sure the viewport in the render context is up-to-date.
// (Note: SetRenderTarget() always resets GraphicsDevice.Viewport.)
_context.Viewport = GraphicsDevice.Viewport;
screen.Render(_context);
if (_context.SourceTexture != null)
{
RenderTargetPool.Recycle(_context.SourceTexture as RenderTarget2D);
_context.SourceTexture = null;
}
}
Debug.Assert(_context.SourceTexture == null, "The RenderContext.SourceTexture should have been recycled.");
Debug.Assert(_context.RenderTarget == finalRenderTarget, "The last graphics screen must render into the back buffer.");
}
finally
{
// If GraphicsScreen.Render() throws, let's at least clear _tempScreens, so we can try again
// in the next frame.
_tempScreens.Clear();
}
}