/// <summary>
/// Create a device context on the specified window.
/// </summary>
/// <param name="display">
/// A <see cref="IntPtr"/> that specifies the display handle associated to <paramref name="windowHandle"/>. Some platforms
/// ignore this parameter (i.e. Windows or EGL implementation).
/// </param>
/// <param name='windowHandle'>
/// A <see cref="IntPtr"/> that specifies the window handle used to create the device context.
/// </param>
/// <exception cref='ArgumentException'>
/// Is thrown when <paramref name="windowHandle"/> is <see cref="IntPtr.Zero"/>.
/// </exception>
/// <exception cref='NotSupportedException'>
/// Exception thrown if the current platform is not supported.
/// </exception>
public static DeviceContext Create(IntPtr display, IntPtr windowHandle)
{
DeviceContext deviceContext = null;
if (IsEglRequired == false)
{
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
deviceContext = new DeviceContextWGL(windowHandle);
break;
case Platform.Id.Linux:
deviceContext = new DeviceContextGLX(display, windowHandle);
break;
case Platform.Id.MacOS:
if (Glx.IsRequired)
{
deviceContext = new DeviceContextGLX(display, windowHandle);
}
else
{
throw new NotSupportedException("platform MacOS not supported without Glx.IsRequired=true");
}
break;
default:
throw new NotSupportedException(String.Format("platform {0} not supported", Environment.OSVersion));
}
}
else
{
deviceContext = new DeviceContextEGL(windowHandle);
}
deviceContext._Api = _DefaultApi;
return(deviceContext);
}
/// <summary>
/// Query the extensions supported by current platform.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="DeviceContextGLX"/> that specifies the device context to query extensions for.
/// </param>
internal void Query(DeviceContextGLX 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[0], KhronosVersion.ApiGlx), glxExtensions ?? String.Empty);
}
/// <summary>
/// Create a device context without a specific window.
/// </summary>
/// <exception cref='NotSupportedException'>
/// Exception thrown if the current platform is not supported.
/// </exception>
public static DeviceContext Create()
{
Debug.Assert(Gl._NativeWindow != null);
DeviceContext deviceContext = null;
if (IsEglRequired == false)
{
switch (Platform.CurrentPlatformId)
{
case Platform.Id.WindowsNT:
deviceContext = new DeviceContextWGL();
break;
case Platform.Id.Linux:
deviceContext = new DeviceContextGLX();
break;
case Platform.Id.MacOS:
if (Glx.IsRequired)
{
deviceContext = new DeviceContextGLX();
}
else
{
throw new NotSupportedException("platform MacOS not supported without Glx.IsRequired=true");
}
break;
default:
throw new NotSupportedException(String.Format("platform {0} not supported", Platform.CurrentPlatformId));
}
}
else
{
if (deviceContext == null)
{
INativePBuffer nativeBuffer = Gl._NativeWindow as INativePBuffer;
if (nativeBuffer != null)
{
deviceContext = new DeviceContextEGL(nativeBuffer);
}
}
if (deviceContext == null)
{
INativeWindow nativeWindow = Gl._NativeWindow as INativeWindow;
if (nativeWindow != null)
{
deviceContext = new DeviceContextEGL(nativeWindow.Handle);
}
}
if (deviceContext == null)
{
Debug.Fail("unsupported EGL surface");
throw new NotSupportedException("EGL surface not supported");
}
}
return(deviceContext);
}
