/// <summary>
/// Creates an OpenGL context from a Unix/Linux platform.
/// </summary>
/// <returns>
/// A <see cref="IDeviceContext"/> that specify the device context.
/// </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>
/// Query OpenGL implementation extensions.
/// </summary>
/// <param name="ctx"></param>
/// <returns></returns>
public static GraphicsCapabilities Query(GraphicsContext ctx, IDeviceContext deviceContext)
{
GraphicsCapabilities graphicsCapabilities = new GraphicsCapabilities();
KhronosApi.LogComment("Query OpenGL extensions.");
#region Platform Extension Reload
// Since at this point there's a current OpenGL context, it's possible to use
// {glx|wgl}GetExtensionsString to retrieve platform specific extensions
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
case PlatformID.Win32Windows:
case PlatformID.Win32S:
case PlatformID.WinCE:
// Wgl.SyncDelegates();
break;
}
#endregion
// OpenGL extensions
graphicsCapabilities._GlExtensions.Query();
// Windows OpenGL extensions
WindowsDeviceContext windowsDeviceContext = deviceContext as WindowsDeviceContext;
if (windowsDeviceContext != null)
{
graphicsCapabilities._WglExtensions.Query(windowsDeviceContext);
}
// GLX OpenGL extensions
XServerDeviceContext xserverDeviceContext = deviceContext as XServerDeviceContext;
if (xserverDeviceContext != null)
{
graphicsCapabilities._GlxExtensions.Query(xserverDeviceContext);
}
// Query implementation limits
graphicsCapabilities._GraphicsLimits = GraphicsLimits.Query(graphicsCapabilities._GlExtensions);
return(graphicsCapabilities);
}
/// <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>
/// Query the extensions supported by current platform.
/// </summary>
/// <param name="deviceContext">
/// A <see cref="XServerDeviceContext"/> 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], KhronosVersion.ApiGlx), glxExtensions ?? String.Empty);
}
