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Merged initial GL3 support from branches/gl3.

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This commit is contained in:
the_fiddler 2009-02-28 19:56:08 +00:00
parent cee4a44e76
commit 529702a317
1 changed files with 52 additions and 15 deletions
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67
Source/OpenTK/Platform/Windows/WinGLContext.cs
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@ -26,10 +26,10 @@ namespace OpenTK.Platform.Windows
/// </summary>
internal sealed class WinGLContext : IGraphicsContext, IGraphicsContextInternal//, IGLContextCreationHack
{
//IntPtr deviceContext;
WinWindowInfo currentWindow;
ContextHandle renderContext;
static IntPtr opengl32Handle;
static bool wgl_loaded;
const string opengl32Name = "OPENGL32.DLL";
//WinWindowInfo windowInfo = new WinWindowInfo();
@ -61,29 +61,66 @@ namespace OpenTK.Platform.Windows
public WinGLContext(GraphicsMode format, IWindowInfo window, IGraphicsContext sharedContext)
{
if (window == null) throw new ArgumentNullException("window", "Must point to a valid window.");
if (window == null)
throw new ArgumentNullException("window", "Must point to a valid window.");
currentWindow = (WinWindowInfo)window;
if (currentWindow.WindowHandle == IntPtr.Zero) throw new ArgumentException("window", "Must be a valid window.");
if (currentWindow.WindowHandle == IntPtr.Zero)
throw new ArgumentException("window", "Must be a valid window.");
this.format = format;
Debug.Print("OpenGL will be bound to handle: {0}", currentWindow.WindowHandle);
Debug.Write("Setting pixel format... ");
this.SetGraphicsModePFD(format, (WinWindowInfo)window);
// Do not rely on OpenTK.Platform.Windows.Wgl - the context is not ready yet,
// and Wgl extensions will fail to load.
Debug.Write("Creating render context... ");
renderContext = new ContextHandle(Wgl.Imports.CreateContext(currentWindow.DeviceContext));
if (renderContext == ContextHandle.Zero)
renderContext = new ContextHandle(Wgl.Imports.CreateContext(currentWindow.DeviceContext));
if (renderContext == ContextHandle.Zero)
throw new GraphicsContextException(String.Format("Context creation failed. Wgl.CreateContext() error: {0}.",
Marshal.GetLastWin32Error()));
if (!wgl_loaded)
{
// We need to create a temp context in order to load wgl extensions (e.g. for multisampling or GL3).
// We cannot rely on OpenTK.Platform.Wgl until we create the context and call Wgl.LoadAll().
Debug.Print("Creating temporary context for wgl extensions.");
Debug.WriteLine(String.Format("done! (id: {0})", renderContext));
ContextHandle temp_context = new ContextHandle(Wgl.Imports.CreateContext(currentWindow.DeviceContext));
Wgl.Imports.MakeCurrent(currentWindow.DeviceContext, temp_context.Handle);
Wgl.LoadAll();
Wgl.MakeCurrent(IntPtr.Zero, IntPtr.Zero);
Wgl.DeleteContext(temp_context.Handle);
wgl_loaded = true;
}
if (Wgl.Delegates.wglCreateContextAttribsARB != null)
{
try
{
Debug.Write("Attempting to create GL3 render context... ");
renderContext = new ContextHandle(
Wgl.Arb.CreateContextAttribs(
currentWindow.DeviceContext,
sharedContext != null ? (sharedContext as IGraphicsContextInternal).Context.Handle : IntPtr.Zero,
new int[]
{
(int)ArbCreateContext.MajorVersion, 3,
(int)ArbCreateContext.MinorVersion, 0,
0
}));
}
catch (EntryPointNotFoundException e) { Debug.Print(e.ToString()); }
catch (NullReferenceException e) { Debug.Print(e.ToString()); }
}
if (renderContext == ContextHandle.Zero)
{
// Failed to create GL3-level context, fall back to GL2.
Debug.Write("failed. Falling back to GL2... ");
renderContext = new ContextHandle(Wgl.Imports.CreateContext(currentWindow.DeviceContext));
if (renderContext == ContextHandle.Zero)
renderContext = new ContextHandle(Wgl.Imports.CreateContext(currentWindow.DeviceContext));
if (renderContext == ContextHandle.Zero)
throw new GraphicsContextException(
String.Format("Context creation failed. Wgl.CreateContext() error: {0}.",
Marshal.GetLastWin32Error()));
}
Debug.WriteLine(String.Format("success! (id: {0})", renderContext));
if (sharedContext != null)
{