mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-26 16:55:39 +00:00
297 lines
10 KiB
C#
297 lines
10 KiB
C#
#region --- License ---
|
|
/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
|
|
* Contributions by Andy Gill.
|
|
* See license.txt for license info
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
using System.Reflection;
|
|
using OpenTK.Platform;
|
|
|
|
using OpenTK.Math;
|
|
using OpenTK.OpenGL.Enums;
|
|
|
|
namespace OpenTK.OpenGL
|
|
{
|
|
public static partial class Glu
|
|
{
|
|
private const string Library = "glu32.dll";
|
|
|
|
private static Dictionary<string, bool> AvailableExtensions = new Dictionary<string, bool>();
|
|
private static bool rebuildExtensionList = true;
|
|
|
|
private static Assembly assembly;
|
|
private static Type glClass;
|
|
private static Type delegatesClass;
|
|
private static Type importsClass;
|
|
|
|
static Glu()
|
|
{
|
|
assembly = Assembly.GetExecutingAssembly();//Assembly.Load("OpenTK.OpenGL");
|
|
glClass = assembly.GetType("OpenTK.OpenGL.Glu");
|
|
delegatesClass = glClass.GetNestedType("Delegates", BindingFlags.Static | BindingFlags.NonPublic);
|
|
importsClass = glClass.GetNestedType("Imports", BindingFlags.Static | BindingFlags.NonPublic);
|
|
}
|
|
|
|
#region private static Delegate GetDelegate(string name, Type signature)
|
|
|
|
/// <summary>
|
|
/// Creates a System.Delegate that can be used to call a GLU function, core or extension.
|
|
/// </summary>
|
|
/// <param name="name">The name of the GLU function (eg. "gluBuild2DMipmaps")</param>
|
|
/// <param name="signature">The signature of the GLU function.</param>
|
|
/// <returns>
|
|
/// A System.Delegate that can be used to call this GLU function, or null if the specified
|
|
/// function name did not correspond to an GLU function.
|
|
/// </returns>
|
|
private static Delegate GetDelegate(string name, Type signature)
|
|
{
|
|
MethodInfo m = importsClass.GetMethod(name.Substring(3), BindingFlags.Static | BindingFlags.NonPublic);
|
|
return
|
|
GL.GetExtensionDelegate(name, signature) ??
|
|
(m != null ? Delegate.CreateDelegate(signature, m) : null);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region public static void LoadAll()
|
|
|
|
/// <summary>
|
|
/// Loads all GLU functions (core and extensions).
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>
|
|
/// Call this function manually whenever you need to update GLU entry points.
|
|
/// This need will never arise under normal usage patterns.
|
|
/// </para>
|
|
/// </remarks>
|
|
public static void LoadAll()
|
|
{
|
|
FieldInfo[] v = delegatesClass.GetFields(BindingFlags.Static | BindingFlags.NonPublic);
|
|
foreach (FieldInfo f in v)
|
|
{
|
|
f.SetValue(null, GetDelegate(f.Name, f.FieldType));
|
|
}
|
|
|
|
AvailableExtensions.Clear();
|
|
rebuildExtensionList = true;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region public static bool Load(string function)
|
|
|
|
/// <summary>
|
|
/// Tries to reload the given GLU function (core or extension).
|
|
/// </summary>
|
|
/// <param name="name">The name of the GLU function.</param>
|
|
/// <returns>True if the function was found and reloaded, false otherwise.</returns>
|
|
/// <remarks>
|
|
/// <para>
|
|
/// While the automatic initialisation will load all GLU entry points, in some cases
|
|
/// the initialization can take place before a render context has been established.
|
|
/// In this case, use this function to load the entry points for the GLU functions
|
|
/// you will need, or use LoadAll() to load all available entry points.
|
|
/// </para>
|
|
/// <para>
|
|
/// This function returns true if the given GLU function is supported, false otherwise.
|
|
/// </para>
|
|
/// <para>
|
|
/// To query for supported extensions use the IsExtensionSupported() function instead.
|
|
/// </para>
|
|
/// </remarks>
|
|
public static bool Load(string function)
|
|
{
|
|
FieldInfo f = delegatesClass.GetField(function);
|
|
if (f == null)
|
|
return false;
|
|
|
|
f.SetValue(null, GetDelegate(f.Name, f.FieldType));
|
|
|
|
rebuildExtensionList = true;
|
|
return f.GetValue(null) != null;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region public static bool SupportsExtension(string name)
|
|
|
|
/// <summary>
|
|
/// Determines whether the specified GLU extension is available in
|
|
/// the current GLU context.
|
|
/// </summary>
|
|
/// <param name="name">The string for the GLU extension.</param>
|
|
/// <returns>True if the specified extension is available, false otherwise.</returns>
|
|
public static bool SupportsExtension(string name)
|
|
{
|
|
if (rebuildExtensionList)
|
|
{
|
|
BuildExtensionList();
|
|
}
|
|
|
|
// Search the cache for the string. Note that the cache substitutes
|
|
// strings "1.0" to "2.1" with "GL_VERSION_1_0" to "GL_VERSION_2_1"
|
|
if (AvailableExtensions.ContainsKey(name))
|
|
{
|
|
return AvailableExtensions[name];
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region private static void BuildExtensionList()
|
|
|
|
/// <summary>
|
|
/// Builds a cache of the supported extensions to speed up searches.
|
|
/// </summary>
|
|
private static void BuildExtensionList()
|
|
{
|
|
// Assumes there is an opengl context current.
|
|
|
|
AvailableExtensions.Clear();
|
|
|
|
string version_string = Glu.GetString(GluStringName.Version);
|
|
if (String.IsNullOrEmpty(version_string))
|
|
{
|
|
throw new ApplicationException("Failed to build extension list. Is there an opengl context current?");
|
|
}
|
|
|
|
string version = version_string.Trim(' ');
|
|
if (version.StartsWith("1.0"))
|
|
{
|
|
AvailableExtensions.Add("VERSION_1_0", true);
|
|
}
|
|
else if (version.StartsWith("1.1"))
|
|
{
|
|
AvailableExtensions.Add("VERSION_1_0", true);
|
|
AvailableExtensions.Add("VERSION_1_1", true);
|
|
}
|
|
else if (version.StartsWith("1.2"))
|
|
{
|
|
AvailableExtensions.Add("VERSION_1_0", true);
|
|
AvailableExtensions.Add("VERSION_1_1", true);
|
|
AvailableExtensions.Add("VERSION_1_2", true);
|
|
}
|
|
else if (version.StartsWith("1.3"))
|
|
{
|
|
AvailableExtensions.Add("VERSION_1_0", true);
|
|
AvailableExtensions.Add("VERSION_1_1", true);
|
|
AvailableExtensions.Add("VERSION_1_2", true);
|
|
AvailableExtensions.Add("VERSION_1_3", true);
|
|
}
|
|
|
|
string extension_string = Glu.GetString(GluStringName.Extensions);
|
|
if (String.IsNullOrEmpty(extension_string))
|
|
{ // no extensions are available
|
|
return;
|
|
}
|
|
|
|
string[] extensions = extension_string.Split(' ');
|
|
foreach (string ext in extensions)
|
|
{
|
|
AvailableExtensions.Add(ext, true);
|
|
}
|
|
|
|
rebuildExtensionList = false;
|
|
}
|
|
|
|
#endregion
|
|
|
|
public class GLUnurbs
|
|
{
|
|
}
|
|
|
|
public class GLUtesselator
|
|
{
|
|
}
|
|
|
|
public class GLUquadric
|
|
{
|
|
}
|
|
|
|
#region Overloads using OpenTK.Math classes
|
|
|
|
public static
|
|
void LookAt(Vector3 eye, Vector3 center, Vector3 up)
|
|
{
|
|
Delegates.gluLookAt((double)eye.X, (double)eye.Y, (double)eye.Z, (double)center.X, (double)center.Y, (double)center.Z, (double)up.X, (double)up.Y, (double)up.Z);
|
|
}
|
|
|
|
// One token Project overload, I picked this one because it's CLS compliant, and it
|
|
// makes reasonably clear which args are inputs and which are outputs.
|
|
public static
|
|
Int32 Project(Vector3 obj, double[] model, double[] proj, Int32[] view, out Vector3 win)
|
|
{
|
|
unsafe
|
|
{
|
|
double winX, winY, winZ;
|
|
double* winX_ptr = &winX;
|
|
double* winY_ptr = &winY;
|
|
double* winZ_ptr = &winZ;
|
|
fixed (double* model_ptr = model)
|
|
fixed (double* proj_ptr = proj)
|
|
fixed (Int32* view_ptr = view)
|
|
{
|
|
Int32 retval = Delegates.gluProject((double)obj.X, (double)obj.Y, (double)obj.Z, (double*)model_ptr, (double*)proj_ptr, (Int32*)view_ptr, (double*)winX_ptr, (double*)winY_ptr, (double*)winZ_ptr);
|
|
win = new Vector3((float)*winX_ptr, (float)*winY_ptr, (float)*winZ_ptr);
|
|
return retval;
|
|
}
|
|
}
|
|
}
|
|
|
|
public static
|
|
void TessNormal(int tess, Vector3 normal)
|
|
{
|
|
Delegates.gluTessNormal((int)tess, (double)normal.X, (double)normal.Y, (double)normal.Z);
|
|
}
|
|
|
|
public static
|
|
Int32 UnProject(Vector3 win, double[] model, double[] proj, Int32[] view, out Vector3 obj)
|
|
{
|
|
unsafe
|
|
{
|
|
double objX, objY, objZ;
|
|
double* objX_ptr = &objX;
|
|
double* objY_ptr = &objY;
|
|
double* objZ_ptr = &objZ;
|
|
fixed (double* model_ptr = model)
|
|
fixed (double* proj_ptr = proj)
|
|
fixed (Int32* view_ptr = view)
|
|
{
|
|
Int32 retval = Delegates.gluUnProject((double)win.X, (double)win.Y, (double)win.Z, (double*)model_ptr, (double*)proj_ptr, (Int32*)view_ptr, (double*)objX_ptr, (double*)objY_ptr, (double*)objZ_ptr);
|
|
obj = new Vector3((float)*objX_ptr, (float)*objY_ptr, (float)*objZ_ptr);
|
|
return retval;
|
|
}
|
|
}
|
|
}
|
|
|
|
public static
|
|
Int32 UnProject4(Vector4 win, double[] model, double[] proj, Int32[] view, double near, double far, out Vector4 obj)
|
|
{
|
|
unsafe
|
|
{
|
|
double objX, objY, objZ, objW;
|
|
double* objX_ptr = &objX;
|
|
double* objY_ptr = &objY;
|
|
double* objZ_ptr = &objZ;
|
|
double* objW_ptr = &objW;
|
|
fixed (double* model_ptr = model)
|
|
fixed (double* proj_ptr = proj)
|
|
fixed (Int32* view_ptr = view)
|
|
{
|
|
Int32 retval = Delegates.gluUnProject4((double)win.X, (double)win.Y, (double)win.Z, (double)win.W, (double*)model_ptr, (double*)proj_ptr, (Int32*)view_ptr, (double)near, (double)far, (double*)objX_ptr, (double*)objY_ptr, (double*)objZ_ptr, (double*)objW_ptr);
|
|
obj = new Vector4((float)*objX_ptr, (float)*objY_ptr, (float)*objZ_ptr, (float)*objW_ptr);
|
|
return retval;
|
|
}
|
|
}
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|