///////////////////////////////////////////////////////////////////////////////////////////////////////////
//TODO: review here, this is our custom OpenGLContext
//eg, used with glfw
GraphicsContext(OpenTK.Platform.External.ExternalGraphicsContext externalGraphicsContext)
{
implementation = externalGraphicsContext;
lock (SyncRoot)
{
IsExternal = true;
//if (handle == ContextHandle.Zero)
//{
// implementation = new OpenTK.Platform.Dummy.DummyGLContext(handle);
//}
//else if (available_contexts.ContainsKey(handle))
//{
// throw new GraphicsContextException("Context already exists.");
//}
//else
//{
// switch ((flags & GraphicsContextFlags.Embedded) == GraphicsContextFlags.Embedded)
// {
// case false: implementation = Factory.Default.CreateGLContext(handle, window, shareContext, direct_rendering, major, minor, flags); break;
// case true: implementation = Factory.Embedded.CreateGLContext(handle, window, shareContext, direct_rendering, major, minor, flags); break;
// }
//}
available_contexts.Add((implementation as IGraphicsContextInternal).Context, new WeakReference(this));
(this as IGraphicsContextInternal).LoadAll();
GetCurrentContextDelegate temp = externalGraphicsContext.CreateCurrentContextDel();
if (temp != null)
{
GetCurrentContext = temp;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenTK.Graphics.GraphicsContext"/> class using
/// an external context handle that was created by a third-party library.
/// </summary>
/// <param name="handle">
/// A valid, unique handle for an external OpenGL context, or <c>ContextHandle.Zero</c> to use the current context.
/// It is an error to specify a handle that has been created through OpenTK or that has been passed to OpenTK before.
/// </param>
/// <param name="getAddress">
/// A <c>GetAddressDelegate</c> instance that accepts the name of an OpenGL function and returns
/// a valid function pointer, or <c>IntPtr.Zero</c> if that function is not supported. This delegate should be
/// implemented using the same toolkit that created the OpenGL context (i.e. if the context was created with
/// SDL_GL_CreateContext(), then this delegate should use SDL_GL_GetProcAddress() to retrieve function
/// pointers.)
/// </param>
/// <param name="getCurrent">
/// A <c>GetCurrentContextDelegate</c> instance that returns the handle of the current OpenGL context,
/// or <c>IntPtr.Zero</c> if no context is current on the calling thread. This delegate should be implemented
/// using the same toolkit that created the OpenGL context (i.e. if the context was created with
/// SDL_GL_CreateContext(), then this delegate should use SDL_GL_GetCurrentContext() to retrieve
/// the current context.)
/// </param>
public GraphicsContext(ContextHandle handle, GetAddressDelegate getAddress, GetCurrentContextDelegate getCurrent)
{
if (getAddress == null || getCurrent == null)
{
throw new ArgumentNullException();
}
lock (SyncRoot)
{
// Replace a zero-handle by the current context, if any
if (handle == ContextHandle.Zero)
{
handle = getCurrent();
}
// Make sure this handle corresponds to a valid, unique OpenGL context
if (handle == ContextHandle.Zero)
{
throw new GraphicsContextMissingException();
}
else if (available_contexts.ContainsKey(handle))
{
throw new InvalidOperationException("Context handle has already been added");
}
// We have a valid handle for an external OpenGL context, wrap it into a
// DummyGLContext instance.
implementation = new Platform.Dummy.DummyGLContext(handle, getAddress);
GetCurrentContext = getCurrent ?? GetCurrentContext;
AddContext(this);
}
implementation.LoadAll();
}
GraphicsContext(OpenTK.Platform.External.ExternalGraphicsContext externalGraphicsContext)
{
implementation = externalGraphicsContext;
lock (SyncRoot)
{
// Angle needs an embedded context
//const GraphicsContextFlags useAngleFlag = GraphicsContextFlags.Angle
// | GraphicsContextFlags.AngleD3D9
// | GraphicsContextFlags.AngleD3D11
// | GraphicsContextFlags.AngleOpenGL;
bool useAngle = true;
try
{
IsExternal = true;
IPlatformFactory factory = Factory.Embedded;
// Note: this approach does not allow us to mix native and EGL contexts in the same process.
// This should not be a problem, as this use-case is not interesting for regular applications.
// Note 2: some platforms may not support a direct way of getting the current context
// (this happens e.g. with DummyGLContext). In that case, we use a slow fallback which
// iterates through all known contexts and checks if any is current (check GetCurrentContext
// declaration).
if (GetCurrentContext == null)
{
GetCurrentContext = externalGraphicsContext.CreateCurrentContextDel(); // factory.CreateGetCurrentGraphicsContext();
}
available_contexts.Add((implementation as IGraphicsContextInternal).Context, this);
(this as IGraphicsContextInternal).LoadAll();
handle_cached = ((IGraphicsContextInternal)implementation).Context;
factory.RegisterResource(this);
}
catch (Exception ex)
{
}
}
}
/// <summary>
/// Constructs a new GraphicsContext with the specified GraphicsMode, version and flags, and attaches it to the specified window.
/// </summary>
/// <param name="mode">The OpenTK.Graphics.GraphicsMode of the GraphicsContext.</param>
/// <param name="window">The OpenTK.Platform.IWindowInfo to attach the GraphicsContext to.</param>
/// <param name="major">The major version of the new GraphicsContext.</param>
/// <param name="minor">The minor version of the new GraphicsContext.</param>
/// <param name="flags">The GraphicsContextFlags for the GraphicsContext.</param>
/// <remarks>
/// Different hardware supports different flags, major and minor versions. Invalid parameters will be silently ignored.
/// </remarks>
public GraphicsContext(GraphicsMode mode, IWindowInfo window, int major, int minor, GraphicsContextFlags flags)
{
lock (SyncRoot)
{
bool designMode = false;
if (mode == null && window == null)
{
designMode = true;
}
else if (mode == null)
{
throw new ArgumentNullException("mode", "Must be a valid GraphicsMode.");
}
else if (window == null)
{
throw new ArgumentNullException("window", "Must point to a valid window.");
}
// Silently ignore invalid major and minor versions.
if (major <= 0)
{
major = 1;
}
if (minor < 0)
{
minor = 0;
}
Debug.Print("Creating GraphicsContext.");
try
{
Debug.Indent();
Debug.Print("GraphicsMode: {0}", mode);
Debug.Print("IWindowInfo: {0}", window);
Debug.Print("GraphicsContextFlags: {0}", flags);
Debug.Print("Requested version: {0}.{1}", major, minor);
IGraphicsContext shareContext = shareContext = FindSharedContext();
// Todo: Add a DummyFactory implementing IPlatformFactory.
if (designMode)
{
implementation = new Platform.Dummy.DummyGLContext();
}
else
{
IPlatformFactory factory = null;
switch ((flags & GraphicsContextFlags.Embedded) == GraphicsContextFlags.Embedded)
{
case false: factory = Factory.Default; break;
case true: factory = Factory.Embedded; break;
}
implementation = factory.CreateGLContext(mode, window, shareContext, direct_rendering, major, minor, flags);
// Note: this approach does not allow us to mix native and EGL contexts in the same process.
// This should not be a problem, as this use-case is not interesting for regular applications.
// Note 2: some platforms may not support a direct way of getting the current context
// (this happens e.g. with DummyGLContext). In that case, we use a slow fallback which
// iterates through all known contexts and checks if any is current (check GetCurrentContext
// declaration).
if (GetCurrentContext == null)
{
GetCurrentContextDelegate temp = factory.CreateGetCurrentGraphicsContext();
if (temp != null)
{
GetCurrentContext = temp;
}
}
}
available_contexts.Add((this as IGraphicsContextInternal).Context, new WeakReference(this));
}
finally
{
Debug.Unindent();
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="OpenTK.Graphics.GraphicsContext"/> class using
/// an external context handle that was created by a third-party library.
/// </summary>
/// <param name="handle">
/// A valid, unique handle for an external OpenGL context, or <c>ContextHandle.Zero</c> to use the current context.
/// It is an error to specify a handle that has been created through OpenTK or that has been passed to OpenTK before.
/// </param>
/// <param name="getAddress">
/// A <c>GetAddressDelegate</c> instance that accepts the name of an OpenGL function and returns
/// a valid function pointer, or <c>IntPtr.Zero</c> if that function is not supported. This delegate should be
/// implemented using the same toolkit that created the OpenGL context (i.e. if the context was created with
/// SDL_GL_CreateContext(), then this delegate should use SDL_GL_GetProcAddress() to retrieve function
/// pointers.)
/// </param>
/// <param name="getCurrent">
/// A <c>GetCurrentContextDelegate</c> instance that returns the handle of the current OpenGL context,
/// or <c>IntPtr.Zero</c> if no context is current on the calling thread. This delegate should be implemented
/// using the same toolkit that created the OpenGL context (i.e. if the context was created with
/// SDL_GL_CreateContext(), then this delegate should use SDL_GL_GetCurrentContext() to retrieve
/// the current context.)
/// </param>
public GraphicsContext(ContextHandle handle, GetAddressDelegate getAddress, GetCurrentContextDelegate getCurrent)
{
if (getAddress == null || getCurrent == null)
throw new ArgumentNullException();
// Make sure OpenTK has been initialized.
// Fixes https://github.com/opentk/opentk/issues/52
Toolkit.Init();
lock (SyncRoot)
{
// Replace a zero-handle by the current context, if any
if (handle == ContextHandle.Zero)
{
handle = getCurrent();
}
// Make sure this handle corresponds to a valid, unique OpenGL context
if (handle == ContextHandle.Zero)
{
throw new GraphicsContextMissingException();
}
else if (available_contexts.ContainsKey(handle))
{
throw new InvalidOperationException("Context handle has already been added");
}
// We have a valid handle for an external OpenGL context, wrap it into a
// DummyGLContext instance.
implementation = new Platform.Dummy.DummyGLContext(handle, getAddress);
GetCurrentContext = getCurrent ?? GetCurrentContext;
AddContext(this);
}
implementation.LoadAll();
}
/// <summary>
/// Constructs a new GraphicsContext with the specified GraphicsMode, version and flags, and attaches it to the
/// specified window. A dummy context will be created if both
/// the handle and the window are null.
/// </summary>
/// <param name="mode">The OpenTK.Graphics.GraphicsMode of the GraphicsContext.</param>
/// <param name="window">The OpenTK.Platform.IWindowInfo to attach the GraphicsContext to.</param>
/// <param name="shareContext">The GraphicsContext to share resources with, or null for explicit non-sharing.</param>
/// <param name="major">The major version of the new GraphicsContext.</param>
/// <param name="minor">The minor version of the new GraphicsContext.</param>
/// <param name="flags">The GraphicsContextFlags for the GraphicsContext.</param>
/// <remarks>
/// Different hardware supports different flags, major and minor versions. Invalid parameters will be silently ignored.
/// </remarks>
public GraphicsContext(GraphicsMode mode, IWindowInfo window, IGraphicsContext shareContext, int major,
int minor, GraphicsContextFlags flags)
{
lock (SyncRoot)
{
var designMode = false;
if (mode == null && window == null)
{
designMode = true;
}
else if (mode == null)
{
throw new ArgumentNullException(nameof(mode), "Must be a valid GraphicsMode.");
}
else if (window == null)
{
throw new ArgumentNullException(nameof(window), "Must point to a valid window.");
}
// Silently ignore invalid major and minor versions.
if (major <= 0)
{
major = 1;
}
if (minor < 0)
{
minor = 0;
}
// Angle needs an embedded context
const GraphicsContextFlags useAngleFlag = GraphicsContextFlags.Angle
| GraphicsContextFlags.AngleD3D9
| GraphicsContextFlags.AngleD3D11
| GraphicsContextFlags.AngleOpenGL;
var useAngle = false;
if ((flags & useAngleFlag) != 0)
{
flags |= GraphicsContextFlags.Embedded;
useAngle = true;
}
Debug.Print("Creating GraphicsContext.");
try
{
Debug.Indent();
Debug.Print("GraphicsMode: {0}", mode);
Debug.Print("IWindowInfo: {0}", window);
Debug.Print("GraphicsContextFlags: {0}", flags);
Debug.Print("Requested version: {0}.{1}", major, minor);
// Todo: Add a DummyFactory implementing IPlatformFactory.
if (designMode)
{
implementation = new DummyGLContext();
}
else
{
IPlatformFactory factory = null;
switch ((flags & GraphicsContextFlags.Embedded) == GraphicsContextFlags.Embedded)
{
case false:
factory = Factory.Default;
break;
case true:
factory = useAngle ? Factory.Angle : Factory.Embedded;
break;
}
// Note: this approach does not allow us to mix native and EGL contexts in the same process.
// This should not be a problem, as this use-case is not interesting for regular applications.
// Note 2: some platforms may not support a direct way of getting the current context
// (this happens e.g. with DummyGLContext). In that case, we use a slow fallback which
// iterates through all known contexts and checks if any is current (check GetCurrentContext
// declaration).
if (GetCurrentContext == null)
{
GetCurrentContext = factory.CreateGetCurrentGraphicsContext();
}
implementation = factory.CreateGLContext(mode, window, shareContext, DirectRendering, major,
minor, flags);
handle_cached = ((IGraphicsContextInternal)implementation).Context;
factory.RegisterResource(this);
}
AddContext(this);
}
finally
{
Debug.Unindent();
}
}
}