Opentk/Source/OpenTK/GameWindow.cs
the_fiddler ec34bed972 Added X11 Mouse support. X11 Keyboard support is faster now.
Made GameWindow.Dispose() virtual.
2007-09-25 16:45:12 +00:00

753 lines
24 KiB
C#

#region --- License ---
/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
* See license.txt for license info
*/
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using OpenTK.Platform;
using OpenTK.Input;
using System.Threading;
using OpenTK.OpenGL;
namespace OpenTK
{
public class GameWindow : OpenTK.Platform.IGameWindow
{
#region --- Fields ---
private INativeGLWindow glWindow;
private ResizeEventArgs resizeEventArgs = new ResizeEventArgs();
private DisplayMode mode;
private InputDriver driver;
private bool isExiting;
private bool disposed;
private double updateTime, renderTime, eventTime, frameTime;
#endregion
#region --- Contructors ---
/// <summary>
/// Constructs a new GameWindow, using a safe DisplayMode.
/// </summary>
public GameWindow()
{
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
case PlatformID.WinCE:
glWindow = new OpenTK.Platform.Windows.WinGLNative();
break;
case PlatformID.Unix:
case (PlatformID)128:
glWindow = new OpenTK.Platform.X11.X11GLNative();
break;
default:
throw new PlatformNotSupportedException("Your platform is not supported currently. Please, refer to http://opentk.sourceforge.net for more information.");
}
glWindow.Resize += new ResizeEvent(glWindow_Resize);
glWindow.Create += new CreateEvent(glWindow_CreateInputDriver);
glWindow.Destroy += new DestroyEvent(glWindow_Destroy);
}
void glWindow_Destroy(object sender, EventArgs e)
{
Debug.Print("GameWindow destruction imminent.");
this.isExiting = true;
this.OnDestroy(EventArgs.Empty);
glWindow.Destroy -= glWindow_Destroy;
//this.Dispose();
}
void glWindow_CreateInputDriver(object sender, EventArgs e)
{
//glWindow.Context.MakeCurrent();
if (driver == null)
driver = new InputDriver(this.WindowInfo);
glWindow.Create -= glWindow_CreateInputDriver;
this.OnCreate(e);
}
void glWindow_Resize(object sender, ResizeEventArgs e)
{
this.OnResize(e);
}
#endregion
#region --- Internal Properties ---
#region public IList<OpenTK.Input.IInputDevice> Input
internal InputDriver InputDriver
{
get
{
if (driver == null && !this.IsExiting)
{
Debug.WriteLine("WARNING: Accessed null InputDriver - creating new. This may indicate a prorgamming error.");
driver = new InputDriver(this.WindowInfo);
}
return driver;
}
}
#endregion
#endregion
#region --- INativeGLWindow Members ---
#region public void Exit()
/// <summary>
/// Gracefully exits the current GameWindow.
/// Override if you want to provide yor own exit sequence.
/// If you override this method, place a call to base.Exit(), to ensure
/// proper OpenTK shutdown.
/// </summary>
public virtual void Exit()
{
isExiting = true;
//glWindow.Exit();
//this.Dispose();
}
#endregion
#region public bool IsIdle
/// <summary>
/// Gets a value indicating whether the current GameWindow is idle.
/// If true, the OnUpdateFrame and OnRenderFrame functions should be called.
/// </summary>
public bool IsIdle
{
get { return glWindow.IsIdle; }
}
#endregion
#region public bool Fullscreen
public bool Fullscreen
{
get { return glWindow.Fullscreen; }
set { glWindow.Fullscreen = value; }
}
#endregion
#region public IGLContext Context
/// <summary>
/// Returns the opengl IGLontext associated with the current GameWindow.
/// Forces window creation.
/// </summary>
public IGLContext Context
{
get
{
if (!this.Exists && !this.IsExiting)
{
Debug.WriteLine("WARNING: OpenGL Context accessed before creating a render window. This may indicate a programming error. Force-creating a render window.");
mode = new DisplayMode(640, 480);
this.CreateWindow(mode);
}
return glWindow.Context;
}
}
#endregion
#region public bool Exists
/// <summary>
/// Gets a value indicating whether a render window has been exists.
/// </summary>
public bool Exists
{
get { return glWindow == null ? false : glWindow.Exists; }
}
#endregion
#region public IWindowInfo WindowInfo
public IWindowInfo WindowInfo
{
get { return glWindow.WindowInfo; }
}
#endregion
#region public void CreateWindow(DisplayMode mode)
/// <summary>
/// Creates a new render window. The Create event is raised after the window creation
/// is complete, to allow resource initalisation.
/// </summary>
/// <param name="mode">The DisplayMode of the render window.</param>
/// <exception cref="ApplicationException">Occurs when a render window already exists.</exception>
public void CreateWindow(DisplayMode mode)
{
if (!Exists)
{
try
{
glWindow.CreateWindow(mode);
}
catch (ApplicationException expt)
{
Debug.Print(expt.ToString());
throw;
}
//OpenTK.OpenGL.GL.LoadAll();
}
else
{
throw new ApplicationException("A render window already exists");
}
}
#endregion
#region OnCreate
[Obsolete("The Create event is obsolete and will be removed on later versions. Use the Load event instead.")]
public event CreateEvent Create;
/// <summary>
/// Raises the Create event. Override in derived classes to initialize resources.
/// </summary>
/// <param name="e"></param>
[Obsolete("The OnCreate method is obsolete and will be removed on later versions. Use the OnLoad method instead.")]
public virtual void OnCreate(EventArgs e)
{
Debug.WriteLine("Firing GameWindow.Create event");
if (this.Create != null)
{
this.Create(this, e);
}
}
#endregion
#region public void DestroyWindow()
/// <summary>
/// Destroys the GameWindow. The Destroy event is raised before destruction commences
/// (while the opengl context still exists), to allow resource cleanup.
/// </summary>
public void DestroyWindow()
{
if (Exists)
{
glWindow.DestroyWindow();
}
else
{
throw new ApplicationException("Tried to destroy inexistent window.");
}
}
#endregion
#region OnDestroy
/// <summary>
/// Raises the Destroy event. Override in derived classes, to modify the shutdown
/// sequence (e.g. to release resources before shutdown).
/// </summary>
/// <param name="e"></param>
public virtual void OnDestroy(EventArgs e)
{
Debug.WriteLine("Firing GameWindow.Destroy event");
if (this.Destroy != null)
{
this.Destroy(this, e);
}
}
public event DestroyEvent Destroy;
#endregion
#endregion
#region --- IGameWindow Members ---
#region public virtual void Run()
/// <summary>
/// Enters the game loop of GameWindow, updating and rendering at the maximum possible frequency.
/// </summary>
/// <see cref="public virtual void Run(float update_frequency, float render_frequency)"/>
public void Run()
{
Run(0.0, 0.0);
}
/// <summary>
/// Runs the default game loop on GameWindow at the specified update frequency, maintaining the
/// maximum possible render frequency.
/// </summary>
/// <see cref="public virtual void Run(double updateFrequency, double renderFrequency)"/>
public void Run(double updateFrequency)
{
Run(updateFrequency, 0.0);
}
/// <summary>
/// Runs the default game loop on GameWindow at the specified update and render frequency.
/// </summary>
/// <param name="updateFrequency">If greater than zero, indicates how many times UpdateFrame will be called per second. If less than or equal to zero, UpdateFrame is raised at maximum possible frequency.</param>
/// <param name="renderFrequency">If greater than zero, indicates how many times RenderFrame will be called per second. If less than or equal to zero, RenderFrame is raised at maximum possible frequency.</param>
/// <remarks>
/// <para>
/// A default game loop consists of three parts: Event processing, frame updating and a frame rendering.
/// This function will try to maintain the requested updateFrequency at all costs, dropping the renderFrequency if
/// there is not enough CPU time.
/// </para>
/// <para>
/// It is recommended that you specify a target for update- and renderFrequency.
/// Doing so, will yield unused CPU time to other processes, dropping power consumption
/// and maximizing batter life. If either frequency is left unspecified, the GameWindow
/// will consume all available CPU time (only useful for benchmarks and stress tests).
/// </para>
/// <para>
/// Override this function if you want to change the behaviour of the
/// default game loop. If you override this function, you must place
/// a call to the ProcessEvents function, to ensure window will respond
/// to Operating System events.
/// </para>
/// </remarks>
public virtual void Run(double updateFrequency, double renderFrequency)
{
this.OnLoad(EventArgs.Empty);
resizeEventArgs.Width = this.Width;
resizeEventArgs.Height = this.Height;
this.OnResize(resizeEventArgs);
Debug.Print("Entering main loop");
Stopwatch watch = new Stopwatch();
UpdateFrameEventArgs updateArgs = new UpdateFrameEventArgs();
RenderFrameEventArgs renderArgs = new RenderFrameEventArgs();
double update_target = 0.0, render_target = 0.0, next_update = 0.0, next_render = 0.0;
double time, total_time;
if (updateFrequency > 0.0)
{
next_update = update_target = 1.0 / updateFrequency;
}
if (renderFrequency > 0.0)
{
next_render = render_target = 1.0 / renderFrequency;
}
while (this.Exists && !IsExiting)
{
total_time = frameTime = watch.Elapsed.TotalSeconds;
if (total_time > 0.1)
total_time = 0.1;
updateArgs.Time = renderArgs.Time = total_time;
watch.Reset();
watch.Start();
time = watch.Elapsed.TotalSeconds;
this.ProcessEvents();
eventTime = watch.Elapsed.TotalSeconds - time;
if (!IsExiting)
{
time = watch.Elapsed.TotalSeconds;
next_update -= (total_time + time);
while (next_update <= 0.0)
{
updateArgs.Time += watch.Elapsed.TotalSeconds;
this.OnUpdateFrame(updateArgs);
if (update_target == 0.0)
break;
next_update += update_target;
}
updateTime = watch.Elapsed.TotalSeconds - time;
time = watch.Elapsed.TotalSeconds;
next_render -= (total_time + time);
if (next_render <= 0.0)
{
renderArgs.Time += time;
this.OnRenderFrame(renderArgs);
next_render += render_target;
}
renderTime = watch.Elapsed.TotalSeconds - time;
if (renderTime < render_target && updateTime < update_target)
{
Thread.Sleep((int)(1000.0 * System.Math.Min(
render_target - renderTime, update_target - updateTime)));
}
}
}
if (this.Exists)
{
glWindow.DestroyWindow();
while (this.Exists)
{
this.ProcessEvents();
}
}
}
#endregion
#region public void ProcessEvents()
/// <summary>
/// Processes operating system events until the GameWindow becomes idle.
/// </summary>
/// <remarks>
/// When overriding the default GameWindow game loop (provided by the Run() function)
/// you should call ProcessEvents() to ensure that your GameWindow responds to
/// operating system events.
/// <para>
/// Once ProcessEvents() returns, it is time to call update and render the next frame.
/// </para>
/// </remarks>
public void ProcessEvents()
{
if (driver != null)
driver.Poll();
glWindow.ProcessEvents();
}
#endregion
#region public virtual void OnRenderFrame(RenderFrameEventArgs e)
/// <summary>
/// Raises the RenderFrame event. Override in derived classes to render a frame.
/// </summary>
/// <remarks>
/// If overriden, the base.OnRenderFrame() function should be called, to ensure
/// listeners are notified of RenderFrame events.
/// </remarks>
public virtual void OnRenderFrame(RenderFrameEventArgs e)
{
if (!this.Exists && !this.IsExiting)
{
Debug.Print("WARNING: RenderFrame event raised, without a valid render window. This may indicate a programming error. Creating render window.");
mode = new DisplayMode(640, 480);
this.CreateWindow(mode);
}
if (RenderFrame != null)
RenderFrame(this, e);
}
/// <summary>
/// Occurs when it is time to render the next frame.
/// </summary>
public event RenderFrameEvent RenderFrame;
#endregion
#region public virtual void OnUpdateFrame(UpdateFrameEventArgs e)
/// <summary>
/// Raises the UpdateFrame event. Override in derived classes to update a frame.
/// </summary>
/// <remarks>
/// If overriden, the base.OnUpdateFrame() function should be called, to ensure
/// listeners are notified of UpdateFrame events.
/// </remarks>
public virtual void OnUpdateFrame(UpdateFrameEventArgs e)
{
if (!this.Exists && !this.IsExiting)
{
Debug.Print("WARNING: UpdateFrame event raised, without a valid render window. This may indicate a programming error. Creating render window.");
mode = new DisplayMode(640, 480);
this.CreateWindow(mode);
}
if (UpdateFrame != null)
UpdateFrame(this, e);
}
/// <summary>
/// Occurs when it is time to update the next frame.
/// </summary>
public event UpdateFrameEvent UpdateFrame;
#endregion
#region public virtual void OnLoad(EventArgs e)
/// <summary>
/// Raises the Load event. Override to load resources that should
/// be maintained for the lifetime of the application.
/// </summary>
public virtual void OnLoad(EventArgs e)
{
Debug.Print("Firing GameWindow.Load event.");
if (this.Load != null)
{
this.Load(this, e);
}
}
/// <summary>
/// Occurs after the GameWindow has been created, but before
/// entering the main loop.
/// </summary>
public event LoadEvent Load;
#endregion
#region public void SwapBuffers()
/// <summary>
/// Swaps the front and back buffer, presenting the rendered scene to the user.
/// Only useful in double- or triple-buffered formats.
/// </summary>
/// <remarks>Calling this function is equivalent to calling Context.SwapBuffers()</remarks>
public void SwapBuffers()
{
Context.SwapBuffers();
}
#endregion
#region public bool IsExiting
/// <summary>
/// Gets a value indicating whether the shutdown sequence has been initiated
/// for this window, by calling GameWindow.Exit() or hitting the 'close' button.
/// If this property is true, it is no longer safe to use any OpenTK.Input or
/// OpenTK.OpenGL functions or properties.
/// </summary>
public bool IsExiting
{
get { return isExiting; }
}
#endregion
#region public IList<Keyboard> Keyboard
/// <summary>
/// Gets the list of available Keyboard devices.
/// </summary>
public IList<Keyboard> Keyboard
{
get
{
return InputDriver.Keyboard;
}
}
#endregion
#endregion
#region --- IResizable Members ---
#region public int Width, Height
/// <summary>
/// Gets or sets the Width of the GameWindow's rendering area, in pixels.
/// </summary>
public int Width
{
get { return glWindow.Width; }
set
{
if (value == this.Width)
{
return;
}
else if (value > 0)
{
glWindow.Width = value;
}
else
{
throw new ArgumentOutOfRangeException(
"Width",
value,
"Width must be greater than 0"
);
}
}
}
/// <summary>
/// Gets or sets the Height of the GameWindow's rendering area, in pixels.
/// </summary>
public int Height
{
get { return glWindow.Height; }
set
{
if (value == this.Height)
{
return;
}
else if (value > 0)
{
glWindow.Height = value;
}
else
{
throw new ArgumentOutOfRangeException(
"Height",
value,
"Height must be greater than 0"
);
}
}
}
#endregion
#region public event ResizeEvent Resize;
public event ResizeEvent Resize;
/// <summary>
/// Raises the Resize event.
/// </summary>
/// <param name="e">Contains the new Width and Height of the window.</param>
protected virtual void OnResize(ResizeEventArgs e)
{
Debug.Print("Firing GameWindow.Resize event: {0}.", e.ToString());
if (this.Resize != null)
this.Resize(this, e);
}
#endregion
/*
/// <summary>
/// Gets the Top coordinate of the GameWindow's rendering area, in pixel coordinates relative to the GameWindow's top left point.
/// </summary>
public int Top
{
get { return glWindow.Top; }
}
/// <summary>
/// /// Gets the Bottom coordinate of the GameWindow's rendering area, in pixel coordinates relative to the GameWindow's top left point.
/// </summary>
public int Bottom
{
get { return glWindow.Bottom; }
}
/// <summary>
/// Gets the Left coordinate of the GameWindow's rendering area, in pixel coordinates relative to the GameWindow's top left point.
/// </summary>
public int Left
{
get { return glWindow.Left; }
}
/// <summary>
/// Gets the Right coordinate of the GameWindow's rendering area, in pixel coordinates relative to the GameWindow's top left point.
/// </summary>
public int Right
{
get { return glWindow.Right; }
}
*/
#endregion
#region --- IDisposable Members ---
/// <summary>
/// Disposes of the GameWindow, releasing all resources consumed by it.
/// </summary>
public virtual void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool manual)
{
if (!disposed)
{
// Is this safe? Maybe 'Debug' has been disposed, too...
//Debug.Print("{0} disposing GameWindow.", manual ? "Manually" : "Automatically");
if (manual)
{
if (driver != null)
{
driver.Dispose();
driver = null;
}
if (glWindow != null)
{
glWindow.Dispose();
glWindow = null;
}
}
disposed = true;
}
}
~GameWindow()
{
this.Dispose(false);
}
#endregion
}
public class UpdateFrameEventArgs : EventArgs
{
private double time;
/// <summary>
/// Gets the Time elapsed between frame updates, in seconds.
/// </summary>
public double Time
{
get { return time; }
internal set { time = value; }
}
}
public class RenderFrameEventArgs : EventArgs
{
private double time;
/// <summary>
/// Gets the Time elapsed between frame updates, in seconds.
/// </summary>
public double Time
{
get { return time; }
internal set { time = value; }
}
}
}