private void CopyFromScreenX11 (int sourceX, int sourceY, int destinationX, int destinationY, Size blockRegionSize, CopyPixelOperation copyPixelOperation)
{
IntPtr window, image, defvisual, vPtr;
int AllPlanes = ~0, nitems = 0, pixel;
if (copyPixelOperation != CopyPixelOperation.SourceCopy)
throw new NotImplementedException ("Operation not implemented under X11");
if (GDIPlus.Display == IntPtr.Zero) {
GDIPlus.Display = GDIPlus.XOpenDisplay (IntPtr.Zero);
}
window = GDIPlus.XRootWindow (GDIPlus.Display, 0);
defvisual = GDIPlus.XDefaultVisual (GDIPlus.Display, 0);
XVisualInfo visual = new XVisualInfo ();
/* Get XVisualInfo for this visual */
visual.visualid = GDIPlus.XVisualIDFromVisual(defvisual);
vPtr = GDIPlus.XGetVisualInfo (GDIPlus.Display, 0x1 /* VisualIDMask */, ref visual, ref nitems);
visual = (XVisualInfo) Marshal.PtrToStructure(vPtr, typeof (XVisualInfo));
#if false
Console.WriteLine ("visual\t{0}", visual.visual);
Console.WriteLine ("visualid\t{0}", visual.visualid);
Console.WriteLine ("screen\t{0}", visual.screen);
Console.WriteLine ("depth\t{0}", visual.depth);
Console.WriteLine ("klass\t{0}", visual.klass);
Console.WriteLine ("red_mask\t{0:X}", visual.red_mask);
Console.WriteLine ("green_mask\t{0:X}", visual.green_mask);
Console.WriteLine ("blue_mask\t{0:X}", visual.blue_mask);
Console.WriteLine ("colormap_size\t{0}", visual.colormap_size);
Console.WriteLine ("bits_per_rgb\t{0}", visual.bits_per_rgb);
#endif
image = GDIPlus.XGetImage (GDIPlus.Display, window, sourceX, sourceY, blockRegionSize.Width,
blockRegionSize.Height, AllPlanes, 2 /* ZPixmap*/);
if (image == IntPtr.Zero) {
string s = String.Format ("XGetImage returned NULL when asked to for a {0}x{1} region block",
blockRegionSize.Width, blockRegionSize.Height);
throw new InvalidOperationException (s);
}
Bitmap bmp = new Bitmap (blockRegionSize.Width, blockRegionSize.Height);
int red, blue, green;
int red_mask = (int) visual.red_mask;
int blue_mask = (int) visual.blue_mask;
int green_mask = (int) visual.green_mask;
for (int y = 0; y < blockRegionSize.Height; y++) {
for (int x = 0; x < blockRegionSize.Width; x++) {
pixel = GDIPlus.XGetPixel (image, x, y);
switch (visual.depth) {
case 16: /* 16bbp pixel transformation */
red = (int) ((pixel & red_mask ) >> 8) & 0xff;
green = (int) (((pixel & green_mask ) >> 3 )) & 0xff;
blue = (int) ((pixel & blue_mask ) << 3 ) & 0xff;
break;
case 24:
case 32:
red = (int) ((pixel & red_mask ) >> 16) & 0xff;
green = (int) (((pixel & green_mask ) >> 8 )) & 0xff;
blue = (int) ((pixel & blue_mask )) & 0xff;
break;
default:
string text = Locale.GetText ("{0}bbp depth not supported.", visual.depth);
throw new NotImplementedException (text);
}
bmp.SetPixel (x, y, Color.FromArgb (255, red, green, blue));
}
}
DrawImage (bmp, destinationX, destinationY);
bmp.Dispose ();
GDIPlus.XDestroyImage (image);
GDIPlus.XFree (vPtr);
}
internal extern static IntPtr XGetVisualInfo (IntPtr display, int vinfo_mask, ref XVisualInfo vinfo_template, ref int nitems);
internal static extern IntPtr XGetVisualInfo(IntPtr display, int vinfo_mask, ref XVisualInfo vinfo_template, ref int nitems);