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using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using GLFW;
namespace Unicity.Renderer
{
public class RenderWindow : IDisposable
{
const int FPS = 60;
internal NativeWindow window = null;
Stopwatch loopTimer = new Stopwatch();
public event EventHandler Init;
public event EventHandler Update;
public event EventHandler Render;
public int Width
{
get => window.ClientSize.Width;
set => window.ClientSize = new Size(value, window.ClientSize.Height);
}
public int Height
{
get => window.ClientSize.Height;
set => window.ClientSize = new Size(window.ClientSize.Width, value);
}
public string Title
{
get => window.Title;
set => window.Title = value;
}
public RenderWindow(int width, int height, string title)
{
if (!File.Exists(Glfw.LIBRARY + ".dll"))
{
throw new WindowCreationFailedException("A required library file is missing and operation cannot continue.");
}
if (!Glfw.Init())
{
throw new WindowCreationFailedException("Failed to initialize GLFW.");
}
window = new NativeWindow(width, height, title);
window.SizeChanged += Window_SizeChanged;
}
private void Window_SizeChanged(object sender, SizeChangeEventArgs e)
{
GraphicsRenderer.GL.Viewport(0, 0, Width, Height);
UpdateWindow();
}
public void StartUpdateLoop()
{
if (loopTimer.IsRunning) return;
loopTimer.Start();
Init?.Invoke(this, EventArgs.Empty);
while (!window.IsClosed)
{
Glfw.PollEvents();
if (!window.IsClosing) UpdateWindow();
}
loopTimer.Stop();
}
private void UpdateWindow()
{
if (loopTimer.Elapsed.TotalMilliseconds >= 1000 / FPS)
{
loopTimer.Restart();
Update?.Invoke(this, EventArgs.Empty);
Render?.Invoke(this, EventArgs.Empty);
window.SwapBuffers();
}
}
bool disposed = false;
protected virtual void Dispose(bool disposing)
{
// Return of already disposed
if (disposed)
{
return;
}
if (disposing)
{
// Free managed objects here
}
// Dispose of any unmanaged resources
window?.Dispose();
Glfw.Terminate();
// Set disposed flag to true
disposed = true;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
}
}
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