/// <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>
/// Get the <see cref="Glx.XVisualInfo"/> set on the specified X window.
/// </summary>
/// <param name="xWindow">
/// The <see cref="IntPtr"/> that specifies the handle of the X window.
/// </param>
/// <returns>
/// It returns the <see cref="Glx.XVisualInfo"/> set on <paramref name="xWindow"/>.
/// </returns>
private Glx.XVisualInfo GetVisualInfoFromXWindow(IntPtr xWindow)
{
Glx.XVisualInfo xVisualInfo;
uint[] windowFBConfigId = new uint[1];
int screen = Glx.XDefaultScreen(_Display);
// Get the FB configuration associated to the native window
Glx.QueryDrawable(_Display, _WindowHandle, Glx.FBCONFIG_ID, windowFBConfigId);
if (windowFBConfigId[0] == 0)
{
KhronosApi.LogComment("Glx.QueryDrawable cannot query Glx.FBCONFIG_ID. Query manually.");
return(NativeWindow._InternalVisual);
}
unsafe {
int[] attributes = new int[] {
Glx.FBCONFIG_ID, (int)windowFBConfigId[0],
0,
};
int[] choosenConfigCount = new int[1];
IntPtr *choosenConfigs = Glx.ChooseFBConfig(_Display, screen, attributes, choosenConfigCount);
if (choosenConfigCount[0] == 0)
{
throw new InvalidOperationException("unable to find X Window visual configuration");
}
IntPtr configId = *choosenConfigs;
xVisualInfo = Glx.GetVisualFromFBConfig(_Display, configId);
Glx.XFree((IntPtr)choosenConfigs);
}
return(xVisualInfo);
}
/// <summary>
/// Set the device pixel format.
/// </summary>
/// <param name="pixelFormat">
/// A <see cref="DevicePixelFormat"/> that specifies the pixel format to set.
/// </param>
public override void ChoosePixelFormat(DevicePixelFormat pixelFormat)
{
if (pixelFormat == null)
{
throw new ArgumentNullException("pixelFormat");
}
int screen = Glx.XDefaultScreen(_Display);
// Get basic visual
Glx.XVisualInfo visual;
IntPtr config;
List <int> attributes = new List <int>();
if (pixelFormat.RenderWindow)
{
attributes.AddRange(new int[] { Glx.DRAWABLE_TYPE, (int)Glx.WINDOW_BIT });
}
if (pixelFormat.RgbaUnsigned)
{
attributes.AddRange(new int[] { Glx.RENDER_TYPE, (int)Glx.RGBA_BIT });
}
if (pixelFormat.RgbaFloat)
{
attributes.AddRange(new int[] { Glx.RENDER_TYPE, (int)Glx.RGBA_FLOAT_BIT_ARB });
}
if (pixelFormat.DoubleBuffer)
{
attributes.AddRange(new int[] { Glx.DOUBLEBUFFER, Gl.TRUE });
}
if (pixelFormat.ColorBits > 0)
{
switch (pixelFormat.ColorBits)
{
case 16:
attributes.AddRange(new int[] { Glx.RED_SIZE, 5, Glx.GREEN_SIZE, 6, Glx.BLUE_SIZE, 8, Glx.ALPHA_SIZE, 5 });
break;
case 24:
attributes.AddRange(new int[] { Glx.RED_SIZE, 8, Glx.GREEN_SIZE, 8, Glx.BLUE_SIZE, 8 });
break;
case 32:
attributes.AddRange(new int[] { Glx.RED_SIZE, 8, Glx.GREEN_SIZE, 8, Glx.BLUE_SIZE, 8, Glx.ALPHA_SIZE, 8 });
break;
default:
if (pixelFormat.ColorBits < 16)
{
attributes.AddRange(new int[] { Glx.RED_SIZE, 1, Glx.GREEN_SIZE, 1, Glx.BLUE_SIZE, 1 });
}
else
{
int bits = pixelFormat.ColorBits / 4;
attributes.AddRange(new int[] { Glx.RED_SIZE, bits, Glx.GREEN_SIZE, bits, Glx.BLUE_SIZE, bits });
}
break;
}
}
if (pixelFormat.DepthBits > 0)
{
attributes.AddRange(new int[] { Glx.DEPTH_SIZE, pixelFormat.DepthBits });
}
if (pixelFormat.StencilBits > 0)
{
attributes.AddRange(new int[] { Glx.STENCIL_SIZE, pixelFormat.StencilBits });
}
attributes.Add(0);
unsafe {
int[] choosenConfigCount = new int[1];
IntPtr *choosenConfigs = Glx.ChooseFBConfig(_Display, screen, attributes.ToArray(), choosenConfigCount);
if (choosenConfigCount[0] == 0)
{
throw new InvalidOperationException("unable to choose visual");
}
config = *choosenConfigs;
KhronosApi.LogComment("Choosen config is 0x{0}", config.ToString("X8"));
visual = Glx.GetVisualFromFBConfig(_Display, config);
KhronosApi.LogComment("Choosen visual is {0}", visual);
Glx.XFree((IntPtr)choosenConfigs);
}
_FBConfig = config;
_XVisualInfo = visual;
IsPixelFormatSet = true;
}
/// <summary>
/// Default constructor.
/// </summary>
public NativeWindow(int x, int y, uint width, uint height)
{
try {
// Open display
if ((_Display = Glx.XOpenDisplay(IntPtr.Zero)) == IntPtr.Zero)
{
throw new InvalidOperationException("unable to connect to X server");
}
Glx.XVisualInfo visual;
IntPtr config;
int[] attributes = new int[] {
Glx.DRAWABLE_TYPE, (int)Glx.WINDOW_BIT,
Glx.RENDER_TYPE, (int)Glx.RGBA_BIT,
Glx.DOUBLEBUFFER, unchecked ((int)Glx.DONT_CARE),
Glx.RED_SIZE, 1,
Glx.GREEN_SIZE, 1,
Glx.BLUE_SIZE, 1,
0
};
int screen = Glx.XDefaultScreen(_Display);
// Get basic visual
unsafe {
int[] choosenConfigCount = new int[1];
IntPtr *choosenConfigs = Glx.ChooseFBConfig(_Display, screen, attributes, choosenConfigCount);
if (choosenConfigCount[0] == 0)
{
throw new InvalidOperationException("unable to find basic visual");
}
config = *choosenConfigs;
KhronosApi.LogComment("Choosen config is 0x{0}", config.ToString("X8"));
visual = Glx.GetVisualFromFBConfig(_Display, config);
KhronosApi.LogComment("Choosen visual is {0}", visual);
Glx.XFree((IntPtr)choosenConfigs);
_InternalConfig = config;
_InternalVisual = visual;
}
Glx.XSetWindowAttributes setWindowAttrs = new Glx.XSetWindowAttributes();
IntPtr rootWindow = Glx.XRootWindow(_Display, screen);
ulong setWindowAttrFlags = /* CWBorderPixel | CWColormap | CWEventMask*/ (1L << 3) | (1L << 13) | (1L << 11);
setWindowAttrs.border_pixel = IntPtr.Zero;
setWindowAttrs.event_mask = /* StructureNotifyMask */new IntPtr(1L << 17);
setWindowAttrs.colormap = Glx.XCreateColormap(_Display, rootWindow, visual.visual, /* AllocNone */ 0);
if ((_Handle = Glx.XCreateWindow(_Display, rootWindow, x, y, (int)width, (int)height, 0, visual.depth, /* InputOutput */ 0, visual.visual, new UIntPtr(setWindowAttrFlags), ref setWindowAttrs)) == IntPtr.Zero)
{
throw new InvalidOperationException("unable to create window");
}
// Assign FB configuration to window: essential to make CreateContext(IntPtr) working
_GlxHandle = Glx.CreateWindow(_Display, config, _Handle, null);
} catch {
Dispose();
throw;
}
}