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Use Glx.ChooseFBConfig instead of the deprecated Glx.ChooseVisual, if the first is available. This is necessary for OpenGL 3.0 contexts.

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This commit is contained in:
the_fiddler 2009-03-07 07:16:46 +00:00
parent 4efee1f1ef
commit 70963b09af
1 changed files with 38 additions and 3 deletions
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41
Source/OpenTK/Platform/X11/X11GraphicsMode.cs
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@ -18,16 +18,22 @@ namespace OpenTK.Platform.X11
{
class X11GraphicsMode : IGraphicsMode
{
internal X11GraphicsMode()
#region Constructors
public X11GraphicsMode()
{
}
#endregion
#region IGraphicsMode Members
public GraphicsMode SelectGraphicsMode(ColorFormat color, int depth, int stencil, int samples, ColorFormat accum,
int buffers, bool stereo)
{
GraphicsMode gfx; // The actual GraphicsMode that will be selected.
List<int> visualAttributes = new List<int>();
IntPtr visual;
IntPtr visual = IntPtr.Zero;
Debug.Print("Bits per pixel: {0}", color.BitsPerPixel);
@ -90,7 +96,34 @@ namespace OpenTK.Platform.X11
IntPtr root = Functions.XRootWindow(display, screen);
Debug.Print("Display: {0}, Screen: {1}, RootWindow: {2}", display, screen, root);
visual = Glx.ChooseVisual(display, screen, visualAttributes.ToArray());
try
{
unsafe
{
Debug.Print("Getting FB config.");
int fbcount;
// Note that ChooseFBConfig returns an array of GLXFBConfig opaque structures (i.e. mapped to IntPtrs).
IntPtr* fbconfigs = Glx.ChooseFBConfig(display, screen, visualAttributes.ToArray(), out fbcount);
if (fbcount > 0 && fbconfigs != null)
{
// We want to use the first GLXFBConfig from the fbconfigs array (the first one is the best match).
visual = Glx.GetVisualFromFBConfig(display, *fbconfigs);
Functions.XFree((IntPtr)fbconfigs);
}
}
}
catch (EntryPointNotFoundException)
{
Debug.Print("Functions glXChooseFBConfig not supported.");
}
// Older drivers don't support glXChooseFBConfig and glXGetVisualFromFBConfig.
// Fall back to the old glXChooseVisual method.
if (visual == IntPtr.Zero)
{
Debug.Print("Falling back to glXChooseVisual.");
visual = Glx.ChooseVisual(display, screen, visualAttributes.ToArray());
}
if (visual == IntPtr.Zero)
throw new GraphicsContextException("Requested GraphicsMode not available.");
@ -156,5 +189,7 @@ namespace OpenTK.Platform.X11
return gfx;
}
#endregion
}
}