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opentk
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[Win] Implemented calli-based interop for WGL

This commit is contained in:
Stefanos A. 2014-01-21 09:00:25 +01:00
Родитель c2e3328f59
Коммит 5379deaf63
2 изменённых файлов: 202 добавлений и 324 удалений
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334
Source/OpenTK/Platform/Windows/Bindings/Wgl.cs
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@ -34,8 +34,34 @@ namespace OpenTK.Platform.Windows
#pragma warning disable 3019
#pragma warning disable 1591
static partial class Wgl
partial class Wgl
{
static Wgl()
{
EntryPointNames = new string[]
{
"wglCreateContextAttribsARB",
"wglGetExtensionsStringARB",
"wglGetPixelFormatAttribivARB",
"wglGetPixelFormatAttribfvARB",
"wglChoosePixelFormatARB",
"wglMakeContextCurrentARB",
"wglGetCurrentReadDCARB",
"wglCreatePbufferARB",
"wglGetPbufferDCARB",
"wglReleasePbufferDCARB",
"wglDestroyPbufferARB",
"wglQueryPbufferARB",
"wglBindTexImageARB",
"wglReleaseTexImageARB",
"wglSetPbufferAttribARB",
"wglGetExtensionsStringEXT",
"wglSwapIntervalEXT",
"wglGetSwapIntervalEXT",
};
EntryPoints = new IntPtr[EntryPointNames.Length];
}
[SuppressUnmanagedCodeSecurity]
[DllImport(Wgl.Library, EntryPoint = "wglCreateContext", ExactSpelling = true, SetLastError = true)]
internal extern static IntPtr CreateContext(IntPtr hDc);
@ -78,330 +104,232 @@ namespace OpenTK.Platform.Windows
public static partial class Arb
{
[CLSCompliant(false)]
unsafe public static
IntPtr CreateContextAttribs(IntPtr hDC, IntPtr hShareContext, int* attribList)
{
return Delegates.wglCreateContextAttribsARB((IntPtr)hDC, (IntPtr)hShareContext, (int*)attribList);
}
public static
IntPtr CreateContextAttribs(IntPtr hDC, IntPtr hShareContext, ref int attribList)
{
unsafe
{
fixed (int* attribList_ptr = &attribList)
{
return Delegates.wglCreateContextAttribsARB((IntPtr)hDC, (IntPtr)hShareContext, (int*)attribList_ptr);
}
}
}
[AutoGenerated(EntryPoint = "wglCreateContextAttribsARB")]
public static
IntPtr CreateContextAttribs(IntPtr hDC, IntPtr hShareContext, int[] attribList)
{
unsafe
{
fixed (int* attribList_ptr = attribList)
{
return Delegates.wglCreateContextAttribsARB((IntPtr)hDC, (IntPtr)hShareContext, (int*)attribList_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetExtensionsStringARB")]
public static
string GetExtensionsString(IntPtr hdc)
{
unsafe
{
return System.Runtime.InteropServices.Marshal.PtrToStringAnsi(Delegates.wglGetExtensionsStringARB((IntPtr)hdc));
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetPixelFormatAttribivARB")]
public static
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, int[] piAttributes, [Out] int[] piValues)
{
unsafe
{
fixed (int* piAttributes_ptr = piAttributes)
fixed (int* piValues_ptr = piValues)
{
return Delegates.wglGetPixelFormatAttribivARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes_ptr, (int*)piValues_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetPixelFormatAttribivARB")]
public static
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, ref int piAttributes, [Out] out int piValues)
{
unsafe
{
fixed (int* piAttributes_ptr = &piAttributes)
fixed (int* piValues_ptr = &piValues)
{
Boolean retval = Delegates.wglGetPixelFormatAttribivARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes_ptr, (int*)piValues_ptr);
piValues = *piValues_ptr;
return retval;
}
}
}
public static
unsafe Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, int* piAttributes, [Out] int* piValues)
{
return Delegates.wglGetPixelFormatAttribivARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes, (int*)piValues);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetPixelFormatAttribfvARB")]
[System.CLSCompliant(false)]
public static
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, UInt32 nAttributes, int[] piAttributes, [Out] Single[] pfValues)
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, int nAttributes, int[] piAttributes, [Out] Single[] pfValues)
{
unsafe
{
fixed (int* piAttributes_ptr = piAttributes)
fixed (Single* pfValues_ptr = pfValues)
{
return Delegates.wglGetPixelFormatAttribfvARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes_ptr, (Single*)pfValues_ptr);
}
}
}
public static
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, int[] piAttributes, [Out] Single[] pfValues)
{
unsafe
{
fixed (int* piAttributes_ptr = piAttributes)
fixed (Single* pfValues_ptr = pfValues)
{
return Delegates.wglGetPixelFormatAttribfvARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes_ptr, (Single*)pfValues_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetPixelFormatAttribfvARB")]
public static
Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, ref int piAttributes, [Out] out Single pfValues)
{
unsafe
{
fixed (int* piAttributes_ptr = &piAttributes)
fixed (Single* pfValues_ptr = &pfValues)
{
Boolean retval = Delegates.wglGetPixelFormatAttribfvARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes_ptr, (Single*)pfValues_ptr);
pfValues = *pfValues_ptr;
return retval;
}
}
}
[System.CLSCompliant(false)]
public static
unsafe Boolean GetPixelFormatAttrib(IntPtr hdc, int iPixelFormat, int iLayerPlane, Int32 nAttributes, int* piAttributes, [Out] Single* pfValues)
{
return Delegates.wglGetPixelFormatAttribfvARB((IntPtr)hdc, (int)iPixelFormat, (int)iLayerPlane, (UInt32)nAttributes, (int*)piAttributes, (Single*)pfValues);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglChoosePixelFormatARB")]
public static
Boolean ChoosePixelFormat(IntPtr hdc, int[] piAttribIList, Single[] pfAttribFList, Int32 nMaxFormats, [Out] int[] piFormats, out int nNumFormats)
{
unsafe
{
fixed (int* piAttribIList_ptr = piAttribIList)
fixed (Single* pfAttribFList_ptr = pfAttribFList)
fixed (int* piFormats_ptr = piFormats)
fixed (Int32* nNumFormats_ptr = &nNumFormats)
{
return Delegates.wglChoosePixelFormatARB((IntPtr)hdc, (int*)piAttribIList_ptr, (Single*)pfAttribFList_ptr, (UInt32)nMaxFormats, (int*)piFormats_ptr, (UInt32*)nNumFormats_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglChoosePixelFormatARB")]
public static
Boolean ChoosePixelFormat(IntPtr hdc, ref int piAttribIList, ref Single pfAttribFList, Int32 nMaxFormats, [Out] out int piFormats, [Out] out Int32 nNumFormats)
{
unsafe
{
fixed (int* piAttribIList_ptr = &piAttribIList)
fixed (Single* pfAttribFList_ptr = &pfAttribFList)
fixed (int* piFormats_ptr = &piFormats)
fixed (Int32* nNumFormats_ptr = &nNumFormats)
{
Boolean retval = Delegates.wglChoosePixelFormatARB((IntPtr)hdc, (int*)piAttribIList_ptr, (Single*)pfAttribFList_ptr, (UInt32)nMaxFormats, (int*)piFormats_ptr, (UInt32*)nNumFormats_ptr);
piFormats = *piFormats_ptr;
nNumFormats = *nNumFormats_ptr;
return retval;
}
}
}
[System.CLSCompliant(false)]
public static
unsafe Boolean ChoosePixelFormat(IntPtr hdc, int* piAttribIList, Single* pfAttribFList, Int32 nMaxFormats, [Out] int* piFormats, [Out] Int32* nNumFormats)
{
return Delegates.wglChoosePixelFormatARB((IntPtr)hdc, (int*)piAttribIList, (Single*)pfAttribFList, (UInt32)nMaxFormats, (int*)piFormats, (UInt32*)nNumFormats);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglMakeContextCurrentARB")]
public static
Boolean MakeContextCurrent(IntPtr hDrawDC, IntPtr hReadDC, IntPtr hglrc)
{
return Delegates.wglMakeContextCurrentARB((IntPtr)hDrawDC, (IntPtr)hReadDC, (IntPtr)hglrc);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetCurrentReadDCARB")]
public static
IntPtr GetCurrentReadDC()
{
return Delegates.wglGetCurrentReadDCARB();
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglCreatePbufferARB")]
public static
IntPtr CreatePbuffer(IntPtr hDC, int iPixelFormat, int iWidth, int iHeight, int[] piAttribList)
{
unsafe
{
fixed (int* piAttribList_ptr = piAttribList)
{
return Delegates.wglCreatePbufferARB((IntPtr)hDC, (int)iPixelFormat, (int)iWidth, (int)iHeight, (int*)piAttribList_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglCreatePbufferARB")]
public static
IntPtr CreatePbuffer(IntPtr hDC, int iPixelFormat, int iWidth, int iHeight, ref int piAttribList)
{
unsafe
{
fixed (int* piAttribList_ptr = &piAttribList)
{
return Delegates.wglCreatePbufferARB((IntPtr)hDC, (int)iPixelFormat, (int)iWidth, (int)iHeight, (int*)piAttribList_ptr);
}
}
}
[System.CLSCompliant(false)]
public static
unsafe IntPtr CreatePbuffer(IntPtr hDC, int iPixelFormat, int iWidth, int iHeight, int* piAttribList)
{
return Delegates.wglCreatePbufferARB((IntPtr)hDC, (int)iPixelFormat, (int)iWidth, (int)iHeight, (int*)piAttribList);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetPbufferDCARB")]
public static
IntPtr GetPbufferDC(IntPtr hPbuffer)
{
return Delegates.wglGetPbufferDCARB((IntPtr)hPbuffer);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglReleasePbufferDCARB")]
public static
int ReleasePbufferDC(IntPtr hPbuffer, IntPtr hDC)
{
return Delegates.wglReleasePbufferDCARB((IntPtr)hPbuffer, (IntPtr)hDC);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglDestroyPbufferARB")]
public static
Boolean DestroyPbuffer(IntPtr hPbuffer)
{
return Delegates.wglDestroyPbufferARB((IntPtr)hPbuffer);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglQueryPbufferARB")]
public static
Boolean QueryPbuffer(IntPtr hPbuffer, int iAttribute, [Out] int[] piValue)
{
unsafe
{
fixed (int* piValue_ptr = piValue)
{
return Delegates.wglQueryPbufferARB((IntPtr)hPbuffer, (int)iAttribute, (int*)piValue_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglQueryPbufferARB")]
public static
Boolean QueryPbuffer(IntPtr hPbuffer, int iAttribute, [Out] out int piValue)
{
unsafe
{
fixed (int* piValue_ptr = &piValue)
{
Boolean retval = Delegates.wglQueryPbufferARB((IntPtr)hPbuffer, (int)iAttribute, (int*)piValue_ptr);
piValue = *piValue_ptr;
return retval;
}
}
}
[System.CLSCompliant(false)]
public static
unsafe Boolean QueryPbuffer(IntPtr hPbuffer, int iAttribute, [Out] int* piValue)
{
return Delegates.wglQueryPbufferARB((IntPtr)hPbuffer, (int)iAttribute, (int*)piValue);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglBindTexImageARB")]
public static
Boolean BindTexImage(IntPtr hPbuffer, int iBuffer)
{
return Delegates.wglBindTexImageARB((IntPtr)hPbuffer, (int)iBuffer);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglReleaseTexImageARB")]
public static
Boolean ReleaseTexImage(IntPtr hPbuffer, int iBuffer)
{
return Delegates.wglReleaseTexImageARB((IntPtr)hPbuffer, (int)iBuffer);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglSetPbufferAttribARB")]
public static
Boolean SetPbufferAttrib(IntPtr hPbuffer, int[] piAttribList)
{
unsafe
{
fixed (int* piAttribList_ptr = piAttribList)
{
return Delegates.wglSetPbufferAttribARB((IntPtr)hPbuffer, (int*)piAttribList_ptr);
}
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglSetPbufferAttribARB")]
public static
Boolean SetPbufferAttrib(IntPtr hPbuffer, ref int piAttribList)
{
unsafe
{
fixed (int* piAttribList_ptr = &piAttribList)
{
return Delegates.wglSetPbufferAttribARB((IntPtr)hPbuffer, (int*)piAttribList_ptr);
}
}
}
[System.CLSCompliant(false)]
public static
unsafe Boolean SetPbufferAttrib(IntPtr hPbuffer, int* piAttribList)
{
return Delegates.wglSetPbufferAttribARB((IntPtr)hPbuffer, (int*)piAttribList);
throw new NotImplementedException();
}
}
public static partial class Ext
{
[AutoGenerated(EntryPoint = "wglGetExtensionsStringEXT")]
public static
string GetExtensionsString()
{
unsafe
{
return System.Runtime.InteropServices.Marshal.PtrToStringAnsi(Delegates.wglGetExtensionsStringEXT());
}
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglSwapIntervalEXT")]
public static
Boolean SwapInterval(int interval)
{
return Delegates.wglSwapIntervalEXT((int)interval);
throw new NotImplementedException();
}
[AutoGenerated(EntryPoint = "wglGetSwapIntervalEXT")]
public static
int GetSwapInterval()
{
return Delegates.wglGetSwapIntervalEXT();
throw new NotImplementedException();
}
}
[Slot(0)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern IntPtr wglCreateContextAttribsARB(IntPtr hDC, IntPtr hShareContext, int* attribList);
[Slot(1)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern IntPtr wglGetExtensionsStringARB(IntPtr hdc);
[Slot(2)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern Boolean wglGetPixelFormatAttribivARB(IntPtr hdc, int iPixelFormat, int iLayerPlane, UInt32 nAttributes, int* piAttributes, [Out] int* piValues);
[Slot(3)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern Boolean wglGetPixelFormatAttribfvARB(IntPtr hdc, int iPixelFormat, int iLayerPlane, UInt32 nAttributes, int* piAttributes, [Out] Single* pfValues);
[Slot(4)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern Boolean wglChoosePixelFormatARB(IntPtr hdc, int* piAttribIList, Single* pfAttribFList, UInt32 nMaxFormats, [Out] int* piFormats, [Out] UInt32* nNumFormats);
[Slot(5)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern Boolean wglMakeContextCurrentARB(IntPtr hDrawDC, IntPtr hReadDC, IntPtr hglrc);
[Slot(6)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern IntPtr wglGetCurrentReadDCARB();
[Slot(7)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern IntPtr wglCreatePbufferARB(IntPtr hDC, int iPixelFormat, int iWidth, int iHeight, int* piAttribList);
[Slot(8)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern IntPtr wglGetPbufferDCARB(IntPtr hPbuffer);
[Slot(9)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern int wglReleasePbufferDCARB(IntPtr hPbuffer, IntPtr hDC);
[Slot(10)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern Boolean wglDestroyPbufferARB(IntPtr hPbuffer);
[Slot(11)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern Boolean wglQueryPbufferARB(IntPtr hPbuffer, int iAttribute, [Out] int* piValue);
[Slot(12)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern Boolean wglBindTexImageARB(IntPtr hPbuffer, int iBuffer);
[Slot(13)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern Boolean wglReleaseTexImageARB(IntPtr hPbuffer, int iBuffer);
[Slot(14)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal unsafe static extern Boolean wglSetPbufferAttribARB(IntPtr hPbuffer, int* piAttribList);
[Slot(15)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern IntPtr wglGetExtensionsStringEXT();
[Slot(16)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern Boolean wglSwapIntervalEXT(int interval);
[Slot(17)]
[DllImport(Library, ExactSpelling = true, CallingConvention = CallingConvention.Winapi)]
internal static extern int wglGetSwapIntervalEXT();
}
}

192
Source/OpenTK/Platform/Windows/WglHelper.cs
Просмотреть файл

@ -11,119 +11,29 @@ using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Reflection;
using OpenTK.Graphics;
namespace OpenTK.Platform.Windows
{
internal partial class Wgl
internal partial class Wgl : GraphicsBindingsBase
{
#region --- Constructors ---
static Wgl()
{
assembly = Assembly.GetExecutingAssembly();
wglClass = assembly.GetType("OpenTK.Platform.Windows.Wgl");
delegatesClass = wglClass.GetNestedType("Delegates", BindingFlags.Static | BindingFlags.NonPublic);
//// Ensure core entry points are ready prior to accessing any method.
//// Resolves bug [#993]: "Possible bug in GraphicsContext.CreateDummyContext()"
//LoadAll();
}
#endregion
#region --- Fields ---
static IntPtr[] EntryPoints;
static string[] EntryPointNames;
internal const string Library = "OPENGL32.DLL";
readonly static Dictionary<string, bool> extensions =
new Dictionary<string, bool>();
private static Assembly assembly;
private static Type wglClass;
private static Type delegatesClass;
static readonly object sync = new object();
private static bool rebuildExtensionList = true;
static readonly object SyncRoot = new object();
#endregion
#region static Delegate LoadDelegate(string name, Type signature)
/// <summary>
/// Creates a System.Delegate that can be used to call an OpenGL function, core or extension.
/// </summary>
/// <param name="name">The name of the Wgl function (eg. "wglNewList")</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 specified
/// function name did not correspond to an OpenGL function.
/// </returns>
static Delegate LoadDelegate(string name, Type signature)
public Wgl()
{
Delegate d = GetExtensionDelegate(name, signature);
return d;
EntryPointsInstance = EntryPoints;
EntryPointNamesInstance = EntryPointNames;
}
#endregion
#region private static Delegate GetExtensionDelegate(string name, Type signature)
/// <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 = 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);
}
}
#endregion
#region public static void LoadAll()
/// <summary>
/// Loads all Wgl entry points, core and extensions.
/// </summary>
public static void LoadAll()
{
lock (SyncRoot)
{
OpenTK.Platform.Utilities.LoadExtensions(typeof(Wgl));
}
}
#endregion
#region public static bool Load(string function)
/// <summary>
/// Loads the given Wgl entry point.
/// </summary>
/// <param name="function">The name of the function to load.</param>
/// <returns></returns>
public static bool Load(string function)
{
return OpenTK.Platform.Utilities.TryLoadExtension(typeof(Wgl), function);
}
#endregion
#region Public Members
public static bool SupportsExtension(string name)
{
@ -145,22 +55,15 @@ namespace OpenTK.Platform.Windows
// static WGL/GL classes. Fortunately, this issue is extremely unlikely to arise in practice, as you'd
// have to create one accelerated and one non-accelerated context in the same application, with the
// non-accelerated context coming second.
Wgl.Delegates.GetExtensionsStringARB get_arb = Wgl.Delegates.wglGetExtensionsStringARB;
Wgl.Delegates.GetExtensionsStringEXT get_ext = Wgl.Delegates.wglGetExtensionsStringEXT;
IntPtr str_ptr =
get_arb != null ? get_arb(dc) :
get_ext != null ? get_ext() :
IntPtr.Zero;
bool get_arb = SupportsFunction("wglGetExtensionsStringARB");
bool get_ext = SupportsFunction("wglGetExtensionsStringEXT");
string str =
get_arb ? Arb.GetExtensionsString(dc) :
get_ext ? Ext.GetExtensionsString() :
String.Empty;
if (str_ptr != IntPtr.Zero)
if (!String.IsNullOrEmpty(str))
{
string str;
unsafe
{
str = new string((sbyte*)str_ptr);
}
foreach (string ext in str.Split(' '))
{
extensions.Add(ext, true);
@ -175,20 +78,67 @@ namespace OpenTK.Platform.Windows
return false;
}
#region public static partial class Arb
/// <summary>Contains ARB extensions for WGL.</summary>
public static partial class Arb
/// <summary>
/// Checks whether an extension function is supported.
/// Do not use with core WGL functions, as this function
/// will incorrectly return false.
/// </summary>
/// <param name="name">The extension function to check (e.g. "wglGetExtensionsStringARB"</param>
/// <returns>True if the extension function is supported; otherwise, false.</returns>
public static bool SupportsFunction(string name)
{
int index = Array.IndexOf(EntryPointNames, name);
if (index >= 0)
{
return EntryPoints[index] != IntPtr.Zero;
}
return false;
}
#endregion
#endregion
#region public static partial class Ext
#region Protected Members
/// <summary>Contains EXT extensions for WGL.</summary>
public static partial class Ext
protected override object SyncRoot
{
get { return sync; }
}
protected override IntPtr GetAddress(string function_string)
{
IntPtr address = Wgl.GetProcAddress(function_string);
if (!IsValid(address))
{
address = Functions.GetProcAddress(WinFactory.OpenGLHandle, function_string);
}
return address;
}
#endregion
#region Private Members
static bool IsValid(IntPtr address)
{
// See https://www.opengl.org/wiki/Load_OpenGL_Functions
long a = address.ToInt64();
bool is_valid = (a < -1) || (a > 3);
return is_valid;
}
#endregion
#region Internal Members
internal override void LoadEntryPoints()
{
if (Wgl.GetCurrentContext() != IntPtr.Zero)
{
for (int i = 0; i < EntryPointsInstance.Length; i++)
{
EntryPointsInstance[i] = GetAddress(EntryPointNamesInstance[i]);
}
}
}
#endregion