/// <summary>
/// Query the extensions supported by current platform.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="WindowsDeviceContext"/> that specifies the device context to query extensions for.
/// </param>
public void Query(XServerDeviceContext deviceContext)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
LogComment("Query GLX extensions.");
string glxExtensions = null;
int[] majorArg = new int[1], minorArg = new int[1];
using (Glx.XLock xLock = new Glx.XLock(deviceContext.Display)) {
Glx.QueryVersion(deviceContext.Display, majorArg, minorArg);
if ((majorArg[0] >= 1) && (minorArg[0] >= 1))
glxExtensions = Glx.QueryExtensionsString(deviceContext.Display, 0);
}
Query(new KhronosVersion(majorArg[0], minorArg[1]), glxExtensions ?? String.Empty);
}
/// <summary>
/// Deletes a context.
/// </summary>
/// <param name="ctx">
/// A <see cref="IntPtr"/> that specify the context to be deleted.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful. If it returns false,
/// query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <remarks>
/// <para>The context <paramref name="ctx"/> must not be current on any thread.</para>
/// </remarks>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="ctx"/> is IntPtr.Zero.
/// </exception>
public override bool DeleteContext(IntPtr ctx)
{
if (ctx == IntPtr.Zero)
throw new ArgumentException("ctx");
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
Glx.DestroyContext(Display, ctx);
}
return (true);
}
/// <summary>
/// Makes the context current on the calling thread.
/// </summary>
/// <param name="ctx">
/// A <see cref="IntPtr"/> that specify the context to be current on the calling thread, bound to
/// thise device context. It can be IntPtr.Zero indicating that no context will be current.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public override bool MakeCurrent(IntPtr ctx)
{
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
return (Glx.MakeCurrent(Display, ctx != IntPtr.Zero ? WindowHandle : IntPtr.Zero, ctx));
}
}
/// <summary>
/// Creates a context, specifying attributes.
/// </summary>
/// <param name="sharedContext">
/// A <see cref="IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <param name="attribsList">
/// A <see cref="T:Int32[]"/> that specifies the attributes list.
/// </param>
/// <returns>
/// A <see cref="IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <see cref="attribsList"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="attribsList"/> length is zero or if the last item of <paramref name="attribsList"/>
/// is not zero.
/// </exception>
public override IntPtr CreateContextAttrib(IntPtr sharedContext, int[] attribsList)
{
if (attribsList == null)
throw new ArgumentNullException("attribsList");
if (attribsList.Length == 0)
throw new ArgumentException("zero length array", "attribsList");
if (attribsList[attribsList.Length - 1] != 0)
throw new ArgumentException("not zero-terminated array", "attribsList");
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
return (Glx.CreateContextAttribsARB(Display, FBConfig, sharedContext, true, attribsList));
}
}
/// <summary>
/// Creates a context.
/// </summary>
/// <param name="sharedContext">
/// A <see cref="IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <returns>
/// A <see cref="IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Exception thrown in the case <paramref name="sharedContext"/> is different from IntPtr.Zero, and the objects
/// cannot be shared with it.
/// </exception>
public override IntPtr CreateContext(IntPtr sharedContext)
{
if (XVisualInfo == null)
throw new InvalidOperationException("no visual information");
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
return (Glx.CreateContext(Display, XVisualInfo, sharedContext, true));
}
}
/// <summary>
/// Query the GLX version supported by current implementation.
/// </summary>
private void QueryVersion()
{
using (Glx.XLock xLock = new Glx.XLock(Display)) {
int[] majorArg = new int[1], minorArg = new int[1];
Glx.QueryVersion(Display, majorArg, minorArg);
_GlxVersion = new KhronosVersion(majorArg[0], minorArg[0]);
}
}
/// <summary>
/// Control the the buffers swap of a device.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specifies the device context which buffers will be swapped.
/// </param>
/// <param name="interval">
/// A <see cref="System.Int32"/> that specifies the minimum number of video frames that are displayed
/// before a buffer swap will occur.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful. If it returns false,
/// query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static bool SwapInterval(IDeviceContext deviceContext, int interval)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT:
return (Wgl.SwapIntervalEXT(interval));
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
// Keep into account the SwapIntervalEXT and SwapIntervalSGI entry points, relative to
// two equivalent GLX extensions
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
if (Glx.Delegates.pglXSwapIntervalEXT != null) {
Glx.SwapIntervalEXT(x11DeviceContext.Display, x11DeviceContext.WindowHandle, interval);
return (true);
} else if (Glx.Delegates.pglXSwapIntervalSGI != null)
return (Glx.SwapIntervalSGI(interval) == 0);
else
throw new InvalidOperationException("binding point SwapInterval{EXT|SGI} cannot be found");
}
}
#endif
default:
throw new NotSupportedException();
}
}
/// <summary>
/// Creates an OpenGL context from a Windows platform.
/// </summary>
/// <returns>
/// A <see cref="IntPtr"/>
/// </returns>
private static IntPtr CreateX11SimpleContext(IDeviceContext rDevice)
{
XServerDeviceContext x11DeviceCtx = (XServerDeviceContext)rDevice;
IntPtr rContext;
using (Glx.XLock xLock = new Glx.XLock(x11DeviceCtx.Display)) {
int[] attributes = new int[] {
Glx.RENDER_TYPE, (int)Glx.RGBA_BIT,
0
};
// Get basic visual
unsafe {
int[] choosenConfigCount = new int[1];
IntPtr* choosenConfigs = Glx.ChooseFBConfig(x11DeviceCtx.Display, x11DeviceCtx.Screen, attributes, choosenConfigCount);
if (choosenConfigCount[0] == 0)
throw new InvalidOperationException("unable to find basic visual");
IntPtr choosenConfig = *choosenConfigs;
x11DeviceCtx.XVisualInfo = Glx.GetVisualFromFBConfig(x11DeviceCtx.Display, choosenConfig);
x11DeviceCtx.FBConfig = choosenConfig;
Glx.UnsafeNativeMethods.XFree((IntPtr)choosenConfigs);
}
// Create direct context
rContext = x11DeviceCtx.CreateContext(IntPtr.Zero);
if (rContext == IntPtr.Zero) {
// Fallback to not direct context
rContext = Glx.CreateContext(x11DeviceCtx.Display, x11DeviceCtx.XVisualInfo, IntPtr.Zero, false);
}
if (rContext == IntPtr.Zero)
throw new InvalidOperationException("unable to create context");
return (rContext);
}
}
/// <summary>
/// Deletes a context.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context used for creating the context <paramref name="ctx"/>.
/// </param>
/// <param name="ctx">
/// A <see cref="ctx"/> that specify the context to be deleted.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful. If it returns false,
/// query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <remarks>
/// <para>The context <paramref name="ctx"/> must not be current on any thread.</para>
/// </remarks>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="ctx"/> is IntPtr.Zero.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static bool DeleteContext(IDeviceContext deviceContext, IntPtr ctx)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
if (ctx == IntPtr.Zero)
throw new ArgumentException("ctx");
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT:
return (Wgl.DeleteContext(ctx));
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
Glx.DestroyContext(x11DeviceContext.Display, ctx);
}
return (true);
}
#endif
default:
throw new NotSupportedException(String.Format("platform {0} is not supported", Environment.OSVersion.Platform));
}
}
/// <summary>
/// Makes the context current on the calling thread.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context on which the context has to be current.
/// </param>
/// <param name="ctx">
/// A <see cref="ctx"/> that specify the context to be current on the calling thread, bound to
/// <paramref name="deviceContext"/>. It can be IntPtr.Zero indicating that no context will be current.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful. If it returns false,
/// query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static bool MakeContextCurrent(IDeviceContext deviceContext, IntPtr ctx)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT: {
WindowsDeviceContext winDeviceContext = (WindowsDeviceContext)deviceContext;
return (Wgl.MakeCurrent(winDeviceContext.DeviceContext, ctx));
}
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
return (Glx.MakeCurrent(x11DeviceContext.Display, ctx != IntPtr.Zero ? x11DeviceContext.WindowHandle : IntPtr.Zero, ctx));
}
}
#endif
default:
throw new NotSupportedException(String.Format("platform {0} is not supported", Environment.OSVersion.Platform));
}
}
/// <summary>
/// Creates a context, specifying attributes.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context on which the context has to be created.
/// </param>
/// <param name="sharedContext">
/// A <see cref="System.IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <param name="attribsList">
/// A <see cref="T:Int32[]"/> that specifies the attributes list.
/// </param>
/// <returns>
/// A <see cref="System.IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero; if this is the case, query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> or <see cref="attribsList"/> is null.
/// </exception>
/// <exception cref="ArgumentException">
/// Exception thrown if <paramref name="attribsList"/> length is zero or if the last item of <paramref name="attribsList"/>
/// is not zero.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static IntPtr CreateContextAttrib(IDeviceContext deviceContext, IntPtr sharedContext, int[] attribsList)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
if (attribsList == null)
throw new ArgumentNullException("attribsList");
if (attribsList.Length == 0)
throw new ArgumentException("zero length array", "attribsList");
if (attribsList[attribsList.Length - 1] != 0)
throw new ArgumentException("not zero-terminated array", "attribsList");
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT: {
WindowsDeviceContext winDeviceContext = (WindowsDeviceContext)deviceContext;
return (Wgl.CreateContextAttribsARB(winDeviceContext.DeviceContext, sharedContext, attribsList));
}
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
return (Glx.CreateContextAttribsARB(x11DeviceContext.Display, x11DeviceContext.FBConfig, sharedContext, true, attribsList));
}
}
#endif
default:
throw new NotSupportedException(String.Format("platform {0} is not supported", Environment.OSVersion.Platform));
}
}
/// <summary>
/// Creates a context.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context on which the context has to be created.
/// </param>
/// <param name="sharedContext">
/// A <see cref="System.IntPtr"/> that specify a context that will share objects with the returned one. If
/// it is IntPtr.Zero, no sharing is performed.
/// </param>
/// <returns>
/// A <see cref="System.IntPtr"/> that represents the handle of the created context. If the context cannot be
/// created, it returns IntPtr.Zero; if this is the case, query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> is null.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception thrown in the case <paramref name="sharedContext"/> is different from IntPtr.Zero, and the objects
/// cannot be shared with it.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static IntPtr CreateContext(IDeviceContext deviceContext, IntPtr sharedContext)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
IntPtr renderContext = IntPtr.Zero;
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT:
try {
WindowsDeviceContext winDeviceContext = (WindowsDeviceContext)deviceContext;
renderContext = Wgl.CreateContext(winDeviceContext.DeviceContext);
if ((renderContext != IntPtr.Zero) && (sharedContext != IntPtr.Zero)) {
if (Wgl.ShareLists(renderContext, sharedContext) == false)
throw new InvalidOperationException("failed to share object name space");
}
return (renderContext);
} catch {
if (renderContext != IntPtr.Zero)
Wgl.DeleteContext(renderContext);
throw;
}
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
if (x11DeviceContext.XVisualInfo == null)
throw new InvalidOperationException("no visual information");
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
return (Glx.CreateContext(x11DeviceContext.Display, x11DeviceContext.XVisualInfo, sharedContext, true));
}
}
#endif
default:
throw new NotSupportedException(String.Format("platform {0} is not supported", Environment.OSVersion.Platform));
}
}
/// <summary>
/// Set this GraphicsContext current/uncurrent on device different from the one specified at construction time.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context involved.
/// </param>
/// <param name="flag">
/// A <see cref="Boolean"/> that specify the currency of this GraphicsContext on the
/// device context <paramref name="rDevice"/>.
/// </param>
/// <exception cref="ArgumentException">
/// Exception throw in the case <paramref name="rDevice"/> is <see cref="IntPtr.Zero"/>.
/// </exception>
/// <exception cref="ObjectDisposedException">
/// Exception throw if this GraphicsContext has been disposed. Once the GraphicsContext has been disposed it cannot be current again.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Exception throw if this GraphicsContext cannot be made current/uncurrent on the device context specified by <paramref name="rDevice"/>.
/// </exception>
public void MakeCurrent(IDeviceContext deviceContext, bool flag)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
if (_DeviceContext == null)
throw new ObjectDisposedException("no context associated with this GraphicsContext");
int threadId = System.Threading.Thread.CurrentThread.ManagedThreadId;
if (flag) {
// Make this context current on device
if (deviceContext.MakeCurrent(_RenderContext) == false)
throw new InvalidOperationException("context cannot be current because error " + Marshal.GetLastWin32Error());
// Cache current device context
_CurrentDeviceContext = deviceContext;
// Set current context on this thread (only on success)
lock (_RenderThreadsLock) {
_RenderThreads[threadId] = this;
}
switch (Environment.OSVersion.Platform) {
case PlatformID.Unix:
using (Glx.XLock xLock = new Glx.XLock(((XServerDeviceContext)deviceContext).Display)) {
Gl.SyncDelegates();
}
break;
default:
Gl.SyncDelegates();
break;
}
} else {
// Make this context uncurrent on device
bool res = deviceContext.MakeCurrent(IntPtr.Zero);
// Reset current context on this thread (even on error)
lock (_RenderThreadsLock) {
_RenderThreads[threadId] = null;
}
if (res == false)
throw new InvalidOperationException("context cannot be uncurrent because error " + Marshal.GetLastWin32Error());
}
}
/// <summary>
/// Swap the buffers of a device.
/// </summary>
public override void SwapBuffers()
{
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
Glx.SwapBuffers(Display, WindowHandle);
}
}
/// <summary>
/// Swap the buffers of a device.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="IDeviceContext"/> that specify the device context which buffers will be swapped.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful. If it returns false,
/// query the exception by calling <see cref="GetPlatformException"/>.
/// </returns>
/// <remarks>
/// <para>The context <paramref name="ctx"/> must not be current on any thread.</para>
/// </remarks>
/// <exception cref="ArgumentNullException">
/// Exception thrown if <paramref name="deviceContext"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">
/// Exception thrown if the current platform is not supported.
/// </exception>
public static void SwapBuffers(IDeviceContext deviceContext)
{
if (deviceContext == null)
throw new ArgumentNullException("deviceContext");
switch (Environment.OSVersion.Platform) {
#if OPENGL_NET_SUPPORT_WGL
case PlatformID.Win32Windows:
case PlatformID.Win32NT: {
WindowsDeviceContext winDeviceContext = (WindowsDeviceContext)deviceContext;
Wgl.GdiSwapBuffersFast(winDeviceContext.DeviceContext);
}
break;
#endif
#if OPENGL_NET_SUPPORT_GLX
case PlatformID.Unix: {
XServerDeviceContext x11DeviceContext = (XServerDeviceContext)deviceContext;
using (Glx.XLock displayLock = new Glx.XLock(x11DeviceContext.Display)) {
Glx.SwapBuffers(x11DeviceContext.Display, x11DeviceContext.WindowHandle);
}
}
break;
#endif
default:
throw new NotSupportedException(String.Format("platform {0} is not supported", Environment.OSVersion.Platform));
}
}
/// <summary>
/// Control the the buffers swap of a device.
/// </summary>
/// <param name="interval">
/// A <see cref="System.Int32"/> that specifies the minimum number of video frames that are displayed
/// before a buffer swap will occur.
/// </param>
/// <returns>
/// It returns a boolean value indicating whether the operation was successful.
/// </returns>
public override bool SwapInterval(int interval)
{
// Keep into account the SwapIntervalEXT and SwapIntervalSGI entry points, relative to
// two equivalent GLX extensions
using (Glx.XLock displayLock = new Glx.XLock(Display)) {
if (Glx.Delegates.pglXSwapIntervalEXT != null) {
Glx.SwapIntervalEXT(Display, WindowHandle, interval);
return (true);
} else if (Glx.Delegates.pglXSwapIntervalSGI != null)
return (Glx.SwapIntervalSGI(interval) == 0);
else
throw new InvalidOperationException("binding point SwapInterval{EXT|SGI} cannot be found");
}
}
/// <summary>
/// Query all X11 extensions supported by current implementation.
/// </summary>
private void QueryExtensions()
{
using (Glx.XLock xLock = new Glx.XLock(Display)) {
string extString;
int[] majorArg = new int[1], minorArg = new int[1];
Glx.QueryVersion(Display, majorArg, minorArg);
mGlxMajor = majorArg[0];
mGlxMinor = minorArg[0];
if ((mGlxMajor >= 1) && (mGlxMinor >= 1)) {
extString = Glx.QueryExtensionsString(Display, 0);
if (!String.IsNullOrEmpty(extString)) {
string[] extTokens = extString.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
foreach (string e in extTokens)
mExtensions.Add(e, true);
}
}
}
}
