private bool SupportsExtension(X11WindowInfo window, string e)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
if (e == null)
{
throw new ArgumentNullException("e");
}
if (window.Display != this.Display)
{
throw new InvalidOperationException();
}
string str = (string)null;
using (new XLock(this.Display))
str = Glx.QueryExtensionsString(this.Display, window.Screen);
if (!string.IsNullOrEmpty(str))
{
return(str.Contains(e));
}
else
{
return(false);
}
}
public override void SwapBuffers()
{
if (this.Display == IntPtr.Zero || this.currentWindow.WindowHandle == IntPtr.Zero)
{
throw new InvalidOperationException(string.Format("Window is invalid. Display ({0}), Handle ({1}).", (object)this.Display, (object)this.currentWindow.WindowHandle));
}
using (new XLock(this.Display))
Glx.SwapBuffers(this.Display, this.currentWindow.WindowHandle);
}
/// <summary>
/// Creates a System.Delegate that can be used to call a dynamically exported OpenGL function.
/// </summary>
/// <param name="name">The name of the OpenGL function (eg. "glNewList")</param>
/// <param name="signature">The signature of the OpenGL function.</param>
/// <returns>
/// A System.Delegate that can be used to call this OpenGL function or null
/// if the function is not available in the current OpenGL context.
/// </returns>
private static Delegate GetExtensionDelegate(string name, Type signature)
{
IntPtr address = Glx.GetProcAddress(name);
if (address == IntPtr.Zero ||
address == new IntPtr(1) || // Workaround for buggy nvidia drivers which return
address == new IntPtr(2)) // 1 or 2 instead of IntPtr.Zero for some extensions.
return null;
else
return Marshal.GetDelegateForFunctionPointer(address, signature);
}
private unsafe static ContextHandle CreateContextAttribs(
IntPtr display, int screen, IntPtr fbconfig,
bool direct, int major, int minor,
GraphicsContextFlags flags, ContextHandle shareContext)
{
Debug.Write("Using GLX_ARB_create_context... ");
IntPtr context = IntPtr.Zero;
{
// We need the FB config for the current GraphicsMode.
List <int> attributes = new List <int>();
attributes.Add((int)ArbCreateContext.MajorVersion);
attributes.Add(major);
attributes.Add((int)ArbCreateContext.MinorVersion);
attributes.Add(minor);
if (flags != 0)
{
attributes.Add((int)ArbCreateContext.Flags);
attributes.Add((int)GetARBContextFlags(flags));
attributes.Add((int)ArbCreateContext.ProfileMask);
attributes.Add((int)GetARBProfileFlags(flags));
}
// According to the docs, " <attribList> specifies a list of attributes for the context.
// The list consists of a sequence of <name,value> pairs terminated by the
// value 0. [...]"
// Is this a single 0, or a <0, 0> pair? (Defensive coding: add two zeroes just in case).
attributes.Add(0);
attributes.Add(0);
using (new XLock(display))
{
fixed(int *attrib = attributes.ToArray())
{
context = Glx.pglXCreateContextAttribsARB(display, fbconfig, shareContext.Handle, direct, attrib);
if (context == IntPtr.Zero)
{
Debug.Write(String.Format("failed. Trying direct: {0}... ", !direct));
context = Glx.pglXCreateContextAttribsARB(display, fbconfig, shareContext.Handle, !direct, attrib);
}
}
}
if (context == IntPtr.Zero)
{
Debug.WriteLine("failed.");
}
else
{
Debug.WriteLine("success!");
}
}
return(new ContextHandle(context));
}
private void Dispose(bool manuallyCalled)
{
if (!this.IsDisposed && manuallyCalled)
{
IntPtr display = this.Display;
if (this.IsCurrent)
{
using (new XLock(display))
Glx.MakeCurrent(display, IntPtr.Zero, IntPtr.Zero);
}
using (new XLock(display))
Glx.DestroyContext(display, this.Handle);
}
this.IsDisposed = true;
}
internal static GraphicsMode GetGraphicsMode(XVisualInfo info)
{
// See what we *really* got:
int r, g, b, a, depth, stencil, buffers;
IntPtr display = API.DefaultDisplay;
Glx.glXGetConfig(display, ref info, GLXAttribute.ALPHA_SIZE, out a);
Glx.glXGetConfig(display, ref info, GLXAttribute.RED_SIZE, out r);
Glx.glXGetConfig(display, ref info, GLXAttribute.GREEN_SIZE, out g);
Glx.glXGetConfig(display, ref info, GLXAttribute.BLUE_SIZE, out b);
Glx.glXGetConfig(display, ref info, GLXAttribute.DEPTH_SIZE, out depth);
Glx.glXGetConfig(display, ref info, GLXAttribute.STENCIL_SIZE, out stencil);
Glx.glXGetConfig(display, ref info, GLXAttribute.DOUBLEBUFFER, out buffers);
++buffers;
// the above lines returns 0 - false and 1 - true.
return(new GraphicsMode(new ColorFormat(r, g, b, a), depth, stencil, buffers));
}
public override void MakeCurrent(IWindowInfo window)
{
if (window == this.currentWindow && this.IsCurrent)
{
return;
}
if (window != null && ((X11WindowInfo)window).Display != this.Display)
{
throw new InvalidOperationException("MakeCurrent() may only be called on windows originating from the same display that spawned this GL context.");
}
if (window == null)
{
using (new XLock(this.Display))
{
if (Glx.MakeCurrent(this.Display, IntPtr.Zero, IntPtr.Zero))
{
this.currentWindow = (X11WindowInfo)null;
}
}
}
else
{
X11WindowInfo x11WindowInfo = (X11WindowInfo)window;
if (this.Display == IntPtr.Zero || x11WindowInfo.WindowHandle == IntPtr.Zero || this.Handle == ContextHandle.Zero)
{
throw new InvalidOperationException("Invalid display, window or context.");
}
bool flag;
using (new XLock(this.Display))
{
flag = Glx.MakeCurrent(this.Display, x11WindowInfo.WindowHandle, this.Handle);
if (flag)
{
this.currentWindow = x11WindowInfo;
}
}
if (!flag)
{
throw new GraphicsContextException("Failed to make context current.");
}
}
this.currentWindow = (X11WindowInfo)window;
}
protected override void Dispose(bool manuallyCalled)
{
if (!IsDisposed)
{
if (manuallyCalled)
{
IntPtr display = Display;
if (IsCurrent)
{
Glx.glXMakeCurrent(display, IntPtr.Zero, IntPtr.Zero);
}
Glx.glXDestroyContext(display, ContextHandle);
}
}
else
{
Debug.Print("[Warning] {0} leaked.", this.GetType().Name);
}
IsDisposed = true;
}
public X11GLContext(GraphicsMode mode, X11Window window)
{
Debug.Print("Creating X11GLContext context: ");
cur = window;
XVisualInfo info = cur.VisualInfo;
// Cannot pass a Property by reference.
IntPtr display = API.DefaultDisplay;
ContextHandle = Glx.glXCreateContext(display, ref info, IntPtr.Zero, true);
if (ContextHandle == IntPtr.Zero)
{
Debug.Print("failed. Trying indirect... ");
ContextHandle = Glx.glXCreateContext(display, ref info, IntPtr.Zero, false);
}
if (ContextHandle != IntPtr.Zero)
{
Debug.Print("Context created (id: {0}).", ContextHandle);
}
else
{
throw new GraphicsContextException("Context creation failed. Error: NULL returned");
}
if (!Glx.glXIsDirect(display, ContextHandle))
{
Debug.Print("Warning: Context is not direct.");
}
if (!Glx.glXMakeCurrent(API.DefaultDisplay, window.WinHandle, ContextHandle))
{
throw new GraphicsContextException("Failed to make context current.");
}
Glx.LoadEntryPoints();
vsync_supported = Glx.glXSwapIntervalSGI != null;
}
