mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-26 17:55:39 +00:00
a0e0613420
Added OpenGL 3.0 support for GLX contexts. Added support for creating dummy contexts (useful if you are creating contexts from an external library). Cleaned up unused and stale code.
387 lines
12 KiB
C#
387 lines
12 KiB
C#
#region --- License ---
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/* Copyright (c) 2007 Stefanos Apostolopoulos
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* See license.txt for license info
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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using OpenTK.Graphics.OpenGL;
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using OpenTK.Graphics;
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namespace OpenTK.Platform.X11
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{
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/// <summary>
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/// Provides methods to create and control an opengl context on the X11 platform.
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/// This class supports OpenTK, and is not intended for use by OpenTK programs.
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/// </summary>
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internal sealed class X11GLContext : IGraphicsContext, IGraphicsContextInternal
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{
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ContextHandle context;
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X11WindowInfo currentWindow;
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bool vsync_supported;
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int vsync_interval;
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bool glx_loaded;
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bool disposed;
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#region --- Constructors ---
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static X11GLContext()
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{
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// Set the GetCurrentContext implementation.
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if (GraphicsContext.GetCurrentContext == null)
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GraphicsContext.GetCurrentContext = X11GLContext.GetCurrentContext;
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}
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public X11GLContext(GraphicsMode mode, IWindowInfo window, IGraphicsContext shared, bool direct,
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int major, int minor, GraphicsContextFlags flags)
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{
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if (mode == null)
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throw new ArgumentNullException("mode");
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if (window == null)
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throw new ArgumentNullException("window");
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currentWindow = (X11WindowInfo)window;
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currentWindow.VisualInfo = SelectVisual(mode, currentWindow);
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ContextHandle shareHandle = shared != null ?
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(shared as IGraphicsContextInternal).Context : (ContextHandle)IntPtr.Zero;
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Debug.Write("Creating X11GLContext context: ");
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Debug.Write(direct ? "direct, " : "indirect, ");
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Debug.WriteLine(shareHandle.Handle == IntPtr.Zero ? "not shared... " :
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String.Format("shared with ({0})... ", shareHandle));
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if (!glx_loaded)
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{
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Debug.WriteLine("Loading GLX extensions.");
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// Create a temporary context to obtain the necessary function pointers.
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XVisualInfo visual = currentWindow.VisualInfo;
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IntPtr ctx = Glx.CreateContext(currentWindow.Display, ref visual, IntPtr.Zero, true);
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if (ctx == IntPtr.Zero)
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ctx = Glx.CreateContext(currentWindow.Display, ref visual, IntPtr.Zero, false);
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if (ctx != IntPtr.Zero)
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{
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Glx.LoadAll();
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Glx.MakeCurrent(currentWindow.Display, IntPtr.Zero, IntPtr.Zero);
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Glx.DestroyContext(currentWindow.Display, ctx);
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glx_loaded = true;
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}
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}
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// Try using the new context creation method. If it fails, fall back to the old one.
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// For each of these methods, we try two times to create a context:
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// one with the "direct" flag intact, the other with the flag inversed.
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if (Glx.Delegates.glXCreateContextAttribsARB != null)
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{
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Debug.WriteLine("Using GLX_ARB_create_context...");
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unsafe
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{
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// We need the FB config for the current GraphicsMode.
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int count;
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IntPtr* fbconfigs = Glx.ChooseFBConfig(currentWindow.Display, currentWindow.Screen,
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new int[] { (int)GLXAttribute.VISUAL_ID, (int)mode.Index, 0 }, out count);
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if (count > 0)
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{
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List<int> attributes = new List<int>();
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attributes.Add((int)ArbCreateContext.MajorVersion);
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attributes.Add(major);
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attributes.Add((int)ArbCreateContext.MinorVersion);
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attributes.Add(minor);
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if (flags != 0)
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{
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attributes.Add((int)ArbCreateContext.Flags);
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attributes.Add((int)flags);
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}
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context = new ContextHandle(Glx.Arb.CreateContextAttribs(currentWindow.Display, *fbconfigs,
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shareHandle.Handle, direct, attributes.ToArray()));
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if (context == ContextHandle.Zero)
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context = new ContextHandle(Glx.Arb.CreateContextAttribs(currentWindow.Display, *fbconfigs,
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shareHandle.Handle, !direct, attributes.ToArray()));
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Functions.XFree((IntPtr)fbconfigs);
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}
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}
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}
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if (context == ContextHandle.Zero)
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{
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Debug.WriteLine("Using legacy context creation.");
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XVisualInfo info = currentWindow.VisualInfo; // Cannot pass a Property by reference.
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context = new ContextHandle(Glx.CreateContext(currentWindow.Display, ref info, shareHandle.Handle, direct));
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if (context == ContextHandle.Zero)
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context = new ContextHandle(Glx.CreateContext(currentWindow.Display, ref info, IntPtr.Zero, !direct));
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}
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if (context != ContextHandle.Zero)
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Debug.Print("Success! (id: {0})", context);
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else
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throw new GraphicsContextException("Failed to create OpenGL context. Glx.CreateContext call returned 0.");
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}
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#endregion
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#region --- Private Methods ---
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#region XVisualInfo SelectVisual(GraphicsMode mode, X11WindowInfo currentWindow)
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XVisualInfo SelectVisual(GraphicsMode mode, X11WindowInfo currentWindow)
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{
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XVisualInfo info = new XVisualInfo();
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info.visualid = (IntPtr)mode.Index;
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info.screen = currentWindow.Screen;
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int items;
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lock (API.Lock)
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{
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IntPtr vs = Functions.XGetVisualInfo(currentWindow.Display, XVisualInfoMask.ID | XVisualInfoMask.Screen, ref info, out items);
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if (items == 0)
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throw new GraphicsModeException(String.Format("Invalid GraphicsMode specified ({0}).", mode));
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info = (XVisualInfo)Marshal.PtrToStructure(vs, typeof(XVisualInfo));
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Functions.XFree(vs);
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}
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return info;
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}
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#endregion
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bool SupportsExtension(X11WindowInfo window, string e)
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{
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string extensions = Glx.QueryExtensionsString(window.Display, window.Screen);
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return !String.IsNullOrEmpty(extensions) && extensions.Contains(e);
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}
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#endregion
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#region --- IGraphicsContext Members ---
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#region public void SwapBuffers()
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public void SwapBuffers()
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{
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//if (window == null) throw new ArgumentNullException("window", "Must point to a valid window.");
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//X11WindowInfo w = (X11WindowInfo)window;
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if (currentWindow.Display == IntPtr.Zero || currentWindow.WindowHandle == IntPtr.Zero)
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throw new InvalidOperationException(
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String.Format("Window is invalid. Display ({0}), Handle ({1}).", currentWindow.Display, currentWindow.WindowHandle));
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Glx.SwapBuffers(currentWindow.Display, currentWindow.WindowHandle);
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}
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#endregion
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#region public void MakeCurrent(IWindowInfo window)
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public void MakeCurrent(IWindowInfo window)
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{
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X11WindowInfo w = (X11WindowInfo)window;
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bool result;
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Debug.Write(String.Format("Making context {0} current on thread {1} (Display: {2}, Screen: {3}, Window: {4})... ",
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context, System.Threading.Thread.CurrentThread.ManagedThreadId, w.Display, w.Screen, w.WindowHandle));
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if (w.Display == IntPtr.Zero || w.WindowHandle == IntPtr.Zero || context == ContextHandle.Zero)
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throw new InvalidOperationException("Invalid display, window or context.");
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result = Glx.MakeCurrent(w.Display, w.WindowHandle, context);
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if (!result)
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throw new GraphicsContextException("Failed to make context current.");
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else
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Debug.WriteLine("done!");
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}
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#endregion
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#region public bool IsCurrent
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public bool IsCurrent
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{
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get { return Glx.GetCurrentContext() == this.context.Handle; }
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//set
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//{
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// if (value)
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// Glx.MakeCurrent(window.Display, window.Handle, context);
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// else
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// Glx.MakeCurrent(window.Handle, IntPtr.Zero, IntPtr.Zero);
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//}
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}
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#endregion
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#region public bool VSync
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public bool VSync
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{
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get
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{
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return vsync_supported && vsync_interval > 0;
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}
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set
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{
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if (vsync_supported)
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{
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int error_code = Glx.Sgi.SwapInterval(value ? 1 : 0);
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if (error_code != 0)
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throw new GraphicsException(String.Format("Could not set vsync, error code: {0}", error_code));
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vsync_interval = value ? 1 : 0;
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}
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}
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}
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#endregion
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public event DestroyEvent<IGraphicsContext> Destroy;
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#region public IntPtr GetAddress(string function)
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public IntPtr GetAddress(string function)
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{
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return Glx.GetProcAddress(function);
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}
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#endregion
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#region public void Update
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public void Update(IWindowInfo window)
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{
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}
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#endregion
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public void RegisterForDisposal(IDisposable resource)
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{
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throw new NotSupportedException("Use OpenTK.GraphicsContext instead.");
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}
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public void DisposeResources()
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{
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throw new NotSupportedException("Use OpenTK.GraphicsContext instead.");
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}
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#endregion
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#region --- IGLContextInternal Members ---
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#region Implementation
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IGraphicsContext IGraphicsContextInternal.Implementation
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{
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get { return this; }
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}
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#endregion
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#region void LoadAll()
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void IGraphicsContextInternal.LoadAll()
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{
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GL.LoadAll();
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Glu.LoadAll();
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Glx.LoadAll();
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vsync_supported = this.SupportsExtension(currentWindow, "SGI_swap_control") &&
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this.GetAddress("glXSwapControlSGI") != IntPtr.Zero;
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}
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#endregion
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#region public DisplayMode Mode
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GraphicsMode IGraphicsContextInternal.GraphicsMode
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{
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get { return null; }
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}
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#endregion
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#region ContextHandle IGLContextInternal.Context
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ContextHandle IGraphicsContextInternal.Context
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{
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get { return context; }
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/*private set { context = value; }*/
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}
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#endregion
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#region IWindowInfo IGLContextInternal.Info
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//IWindowInfo IGraphicsContextInternal.Info { get { return window; } }
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#endregion
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#endregion
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#region --- Methods ---
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void OnDestroy()
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{
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if (Destroy != null)
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Destroy(this, EventArgs.Empty);
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}
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#region static ContextHandle GetCurrentContext()
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static ContextHandle GetCurrentContext()
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{
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return (ContextHandle)Glx.GetCurrentContext();
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}
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#endregion
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#endregion
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#region --- IDisposable Members ---
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public void Dispose()
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{
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this.Dispose(true);
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GC.SuppressFinalize(this);
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}
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private void Dispose(bool manuallyCalled)
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{
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if (!disposed)
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{
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// Clean unmanaged resources:
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try
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{
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Functions.XLockDisplay(currentWindow.Display);
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Glx.MakeCurrent(currentWindow.Display, IntPtr.Zero, IntPtr.Zero);
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Glx.DestroyContext(currentWindow.Display, context);
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//Functions.XFree(visual);
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}
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finally
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{
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Functions.XUnlockDisplay(currentWindow.Display);
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}
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if (manuallyCalled)
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{
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}
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}
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disposed = true;
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}
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~X11GLContext()
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{
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this.Dispose(false);
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}
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#endregion
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}
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}
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