extern public static void XSharpFontExtentsPCF (IntPtr fontSet, out XRectangle max_ink_return, out XRectangle max_logical_return);
extern public static void XSharpGetRegionRect (IntPtr region, int index, out XRectangle rect);
extern public static void XSharpTextExtentsSet (IntPtr display, IntPtr fontSet, String str, out XRectangle overall_ink_return, out XRectangle overall_logical_return);
extern public static void XSharpTextExtentsPCF (IntPtr display, IntPtr fontSet, [MarshalAs(UnmanagedType.Interface)] String str, int offset, int count, out XRectangle overall_ink_return, out XRectangle overall_logical_return);
extern public static int XClipBox(IntPtr region, out XRectangle rect);
extern public static int XFillRectangles (IntPtr display, XDrawable drawable, IntPtr gc, XRectangle[] rectangles, int nrectangles);
extern public static int XUnionRectWithRegion (ref XRectangle rectangle, IntPtr src, IntPtr dest);
/// <summary>
/// <para>Xor an explicitly-specified rectangle with
/// this region.</para>
/// </summary>
///
/// <param name="x">
/// <para>The X co-ordinate of the top-left corner of the rectangle.</para>
/// </param>
///
/// <param name="y">
/// <para>The Y co-ordinate of the top-left corner of the rectangle.</para>
/// </param>
///
/// <param name="width">
/// <para>The width of the rectangle.</para>
/// </param>
///
/// <param name="height">
/// <para>The height of the rectangle.</para>
/// </param>
///
/// <exception cref="T:Xsharp.XException">
/// <para>Raised if the rectangle co-ordinates are out of range.</para>
/// </exception>
///
/// <remarks>
/// <para>If this region has been disposed, then it will be treated
/// as empty prior to the xor operation.</para>
/// </remarks>
public void Xor(int x, int y, int width, int height)
{
lock(typeof(Region))
{
if(region == IntPtr.Zero)
{
region = Xlib.XCreateRegion();
if(region == IntPtr.Zero)
{
Display.OutOfMemory();
}
}
XRectangle xrect = new XRectangle(x, y, width, height);
IntPtr reg = Xlib.XCreateRegion();
if(reg == IntPtr.Zero)
{
Display.OutOfMemory();
}
Xlib.XUnionRectWithRegion(ref xrect, reg, reg);
Xlib.XXorRegion(region, reg, region);
Xlib.XDestroyRegion(reg);
}
}
/// <summary>
/// <para>Subtract a rectangle from this region.</para>
/// </summary>
///
/// <param name="rect">
/// <para>The rectangle to subtract from this region.</para>
/// </param>
///
/// <exception cref="T:Xsharp.XException">
/// <para>Raised if the rectangle co-ordinates are out of range.</para>
/// </exception>
///
/// <remarks>
/// <para>If this region has been disposed, then it will be re-created
/// with its initial contents set to empty.</para>
/// </remarks>
public void Subtract(Rectangle rect)
{
lock(typeof(Region))
{
if(region == IntPtr.Zero)
{
region = Xlib.XCreateRegion();
if(region == IntPtr.Zero)
{
Display.OutOfMemory();
}
}
else
{
XRectangle xrect = new XRectangle
(rect.x, rect.y, rect.width, rect.height);
IntPtr reg = Xlib.XCreateRegion();
if(reg == IntPtr.Zero)
{
Display.OutOfMemory();
}
Xlib.XUnionRectWithRegion(ref xrect, reg, reg);
Xlib.XSubtractRegion(region, reg, region);
Xlib.XDestroyRegion(reg);
}
}
}
/// <summary>
/// <para>Union a rectangle with this region.</para>
/// </summary>
///
/// <param name="rect">
/// <para>The rectangle to union with this region.</para>
/// </param>
///
/// <exception cref="T:Xsharp.XException">
/// <para>Raised if the rectangle co-ordinates are out of range.</para>
/// </exception>
///
/// <remarks>
/// <para>If this region has been disposed, then it will be re-created
/// with its initial contents set to <paramref name="rect"/>.</para>
/// </remarks>
public void Union(Rectangle rect)
{
lock(typeof(Region))
{
XRectangle xrect = new XRectangle
(rect.x, rect.y, rect.width, rect.height);
if(region == IntPtr.Zero)
{
region = Xlib.XCreateRegion();
if(region == IntPtr.Zero)
{
Display.OutOfMemory();
}
}
Xlib.XUnionRectWithRegion(ref xrect, region, region);
}
}
/// <summary>
/// <para>Fill a list of rectangles.</para>
/// </summary>
///
/// <param name="rects">
/// <para>The list of rectangles to be drawn.</para>
/// </param>
///
/// <exception cref="T:System.ArgumentNullException">
/// <para>Raised if <paramref name="rects"/> is <see langword="null"/>.
/// </para>
/// </exception>
///
/// <exception cref="T:Xsharp.XException">
/// <para>One of the co-ordinate or size values is out of range, or
/// <paramref name="rects"/> has less than 1 element.</para>
/// </exception>
public void FillRectangles(Rectangle[] rects)
{
int len;
// Validate the parameter.
if(rects == null)
{
throw new ArgumentNullException("rects");
}
len = rects.Length;
if(len < 1)
{
throw new XException(S._("X_Need1Rect"));
}
else if(len > ((dpy.MaxRequestSize() - 3) / 2))
{
throw new XException(S._("X_MaxReqSizeExceeded"));
}
// Convert the "Rectangle" array into an "XRectangle" array.
XRectangle[] xrects = new XRectangle [len];
int r;
for(r = 0; r < len; ++r)
{
xrects[r] = new XRectangle(rects[r].x, rects[r].y,
rects[r].width,
rects[r].height);
}
// Draw the rectangles.
try
{
IntPtr display = Lock();
Xlib.XFillRectangles(display, drawableHandle, gc,
xrects, len);
}
finally
{
dpy.Unlock();
}
}
