/// <summary> Provide a bitmap, containing the transparent graphic, that can be used independent from this class. </summary>
/// <param name="display"> The display pointer, that specifies the connection to the X server. <see cref="System.IntPtr"/> </param>
/// <param name="window"> The target window to create the pixmap for. <see cref="IntPtr"/> </param>
/// <param name="backgroundColorPixel"> The background color behind any transparent pixel. <see cref="TPixel"/> </param>
/// <param name="maskPixmap"> The mask pixmap to distinguish transparent from intransparent pixel. <see cref="IntPtr"/> </param>
/// <returns> The (server side) pixmap (that must be feed) on success, or IntPtr.Zero otherwise. <see cref="IntPtr"/> </returns>
public IntPtr CreateIndependentPixmap(IntPtr display, IntPtr window, TPixel backgroundColorPixel, IntPtr maskPixmap)
{
if (_graphicXImage == IntPtr.Zero)
{
return(IntPtr.Zero);
}
IntPtr pixmap = X11lib.XCreatePixmap(display, window, (TUint)_width, (TUint)_height, (TUint)_graphicDepth);
// Fill pixmap with background color.
IntPtr bgGc = X11lib.XCreateGC(display, window, (TUlong)0, IntPtr.Zero);
X11lib.XSetForeground(display, bgGc, backgroundColorPixel);
X11lib.XFillRectangle(display, pixmap, bgGc, (TInt)0, (TInt)0, (TUint)_width, (TUint)_height);
X11lib.XFreeGC(display, bgGc);
bgGc = IntPtr.Zero;
// Overlay the image.
IntPtr pixmapGc = X11lib.XCreateGC(display, window, (TUlong)0, IntPtr.Zero);
if (pixmapGc != IntPtr.Zero)
{
if (maskPixmap != IntPtr.Zero)
{
// Prepare the clipping graphics context.
IntPtr graphicGc = X11lib.XCreateGC(display, window, (TUlong)0, IntPtr.Zero);
if (graphicGc != IntPtr.Zero)
{
X11lib.XSetClipMask(display, graphicGc, maskPixmap);
X11lib.XSetClipOrigin(display, graphicGc, (TInt)0, (TInt)0);
// Draw graphic using the clipping graphics context.
X11lib.XPutImage(display, pixmap, graphicGc, _graphicXImage, (TInt)0, (TInt)0,
(TInt)0, (TInt)0, (TUint)_width, (TUint)_height);
// Restore previous behaviour and clean up.
X11lib.XSetClipMask(display, graphicGc, IntPtr.Zero);
X11lib.XSetClipOrigin(display, graphicGc, (TInt)0, (TInt)0);
// Console.WriteLine (CLASS_NAME + "::Draw () Delete clipping image GC.");
X11lib.XFreeGC(display, graphicGc);
graphicGc = IntPtr.Zero;
}
else
{
Console.WriteLine(CLASS_NAME + "::Draw () ERROR: Can not create graphics context for transparency application.");
}
}
else
{
X11lib.XPutImage(display, pixmap, pixmapGc, _graphicXImage, (TInt)0, (TInt)0, (TInt)0, (TInt)0, (TUint)_width, (TUint)_height);
// Console.WriteLine (CLASS_NAME + "::CreateIndependentGraphicPixmap () Delete graphic image GC.");
X11lib.XFreeGC(display, pixmapGc);
pixmapGc = IntPtr.Zero;
}
}
else
{
Console.WriteLine(CLASS_NAME + "::CreateIndependentGraphicPixmap () ERROR: Can not create graphics context for graphic pixmap.");
}
return(pixmap);
}