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diff --git a/src/FbTk/Shape.cc b/src/FbTk/Shape.cc
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+// Shape.cc
+// Copyright (c) 2003 - 2006 Henrik Kinnunen (fluxgen at fluxbox dot org)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+#include "Shape.hh"
+
+#include "FbWindow.hh"
+#include "App.hh"
+#include "GContext.hh"
+#include "FbPixmap.hh"
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif // HAVE_CONFIG_H
+
+#ifdef HAVE_CSTRING
+  #include <cstring>
+#else
+  #include <string.h>
+#endif
+
+#include <X11/Xutil.h>
+
+#ifdef SHAPE
+#include <X11/extensions/shape.h>
+#endif // SHAPE
+
+#include <algorithm>
+
+using std::min;
+
+namespace FbTk {
+
+namespace {
+/* rows is an array of 8 bytes, i.e. 8x8 bits */
+Pixmap makePixmap(FbWindow &drawable, const unsigned char rows[]) {
+
+    Display *disp = App::instance()->display();
+
+    const size_t data_size = 8 * 8;
+    // we use calloc here so we get consistent C alloc/free with XDestroyImage
+    // and no warnings in valgrind :)
+    char *data = (char *)calloc(data_size, sizeof (char));
+    if (data == 0)
+        return 0;
+
+    memset(data, 0xFF, data_size);
+
+    XImage *ximage = XCreateImage(disp,
+                                  DefaultVisual(disp, drawable.screenNumber()),
+                                  1,
+                                  XYPixmap, 0,
+                                  data,
+                                  8, 8,
+                                  32, 0);
+    if (ximage == 0)
+        return 0;
+
+    XInitImage(ximage);
+
+    for (int y=0; y<8; y++) {
+        for (int x=0; x<8; x++) {
+            XPutPixel(ximage, x, y, (rows[y] & (0x01 << x)) ? 0 : 1); // inverted, it is subtracted
+        }
+    }
+
+    FbPixmap pm(drawable, 8, 8, 1);
+    GContext gc(pm);
+
+    XPutImage(disp, pm.drawable(), gc.gc(), ximage, 0, 0, 0, 0,
+              8, 8);
+
+    XDestroyImage(ximage);
+
+    return pm.release();
+}
+
+};
+
+std::vector<Shape::CornerPixmaps> Shape::s_corners;
+
+Shape::Shape(FbWindow &win, int shapeplaces):
+    m_win(&win),
+    m_shapesource(0),
+    m_shapesource_xoff(0),
+    m_shapesource_yoff(0),
+    m_shapeplaces(shapeplaces) {
+
+#ifdef SHAPE
+    initCorners(win.screenNumber());
+#endif
+
+    update();
+}
+
+Shape::~Shape() {
+
+#ifdef SHAPE
+    if (m_win != 0 && m_win->window()) {
+        // Reset shape of window
+        XShapeCombineMask(App::instance()->display(),
+                          m_win->window(),
+                          ShapeClip,
+                          0, 0,
+                          0,
+                          ShapeSet);
+        XShapeCombineMask(App::instance()->display(),
+                          m_win->window(),
+                          ShapeBounding,
+                          0, 0,
+                          0,
+                          ShapeSet);
+    }
+#endif // SHAPE
+}
+
+void Shape::initCorners(int screen_num) {
+    if (s_corners.size() == 0)
+        s_corners.resize(ScreenCount(App::instance()->display()));
+ 
+    static const unsigned char left_bits[] = { 0xc0, 0xf8, 0xfc, 0xfe, 0xfe, 0xfe, 0xff, 0xff };
+    static const unsigned char right_bits[] = { 0x03, 0x1f, 0x3f, 0x7f, 0x7f, 0x7f, 0xff, 0xff};
+    static const unsigned char bottom_left_bits[] = { 0xff, 0xff, 0xfe, 0xfe, 0xfe, 0xfc, 0xf8, 0xc0 };
+    static const unsigned char bottom_right_bits[] = { 0xff, 0xff, 0x7f, 0x7f, 0x7f, 0x3f, 0x1f, 0x03 };
+
+    s_corners[screen_num].topleft = makePixmap(*m_win, left_bits);
+    s_corners[screen_num].topright = makePixmap(*m_win, right_bits);
+    s_corners[screen_num].botleft = makePixmap(*m_win, bottom_left_bits);
+    s_corners[screen_num].botright = makePixmap(*m_win, bottom_right_bits);
+
+}
+
+void Shape::setPlaces(int shapeplaces) {
+    m_shapeplaces = shapeplaces;
+}
+
+void Shape::update() {
+    if (m_win == 0 || m_win->window() == 0)
+        return;
+
+#ifdef SHAPE
+    /**
+     * Set the client's shape in position,
+     * or wipe the shape and return.
+     */
+    Display *display = App::instance()->display();
+    int bw = m_win->borderWidth();
+    int width = m_win->width();
+    int height = m_win->height();
+
+    if (m_shapesource == 0 && m_shapeplaces == 0) {
+        /* clear the shape and return */
+        XShapeCombineMask(display,
+                          m_win->window(), ShapeClip,
+                          0, 0,
+                          None, ShapeSet);
+        XShapeCombineMask(display,
+                          m_win->window(), ShapeBounding,
+                          0, 0,
+                          None, ShapeSet);
+        return;
+    }
+
+    XRectangle rect;
+    rect.x = 0;
+    rect.y = 0;
+    rect.width = width;
+    rect.height = height;
+
+    XShapeCombineRectangles(display,
+                            m_win->window(), ShapeClip,
+                            0, 0, /* offsets */
+                            &rect, 
+                            1,    /* number of rectangles */
+                            ShapeSet, /* op */
+                            2     /* ordering: YXSorted... only 1: doesn't matter */ );
+
+    rect.x = -bw;
+    rect.y = -bw;
+    rect.width = width+2*bw;
+    rect.height = height+2*bw;
+
+    XShapeCombineRectangles(display,
+                            m_win->window(), ShapeBounding,
+                            0, 0, /* offsets */
+                            &rect, 
+                            1,    /* number of rectangles */
+                            ShapeSet, /* op */
+                            2     /* ordering: YXSorted... only 1: doesn't matter */ );
+
+    if (m_shapesource != 0) {
+
+        /*
+          Copy the shape from the source.
+          We achieve this by subtracting the client-area size from the shape, and then
+          unioning in the client's mask.
+        */
+        rect.x = m_shapesource_xoff;
+        rect.y = m_shapesource_yoff;
+        rect.width = m_shapesource->width();
+        rect.height = m_shapesource->height();
+
+        XShapeCombineRectangles(display,
+                                m_win->window(), ShapeClip,
+                                0, 0, /* offsets */
+                                &rect, 
+                                1,    /* number of rectangles */
+                                ShapeSubtract, /* op */
+                                2     /* ordering: YXSorted... only 1: doesn't matter */ );
+
+        XShapeCombineShape(display,
+                           m_win->window(), ShapeClip,
+                           rect.x, rect.y, // xOff, yOff
+                           m_shapesource->window(),
+                           ShapeClip, ShapeUnion);
+
+        /* 
+           Now the bounding rectangle. Note that the frame has a shared border with the region above the 
+           client (i.e. titlebar), so we don't want to wipe the shared border, hence the adjustments.
+        */
+        rect.x = m_shapesource_xoff; // note that the full bounding region is already offset by a -borderwidth!
+        rect.y = m_shapesource_yoff;
+        rect.width = m_shapesource->width(); // we don't wipe the outer bounding region [i think]
+        rect.height = m_shapesource->height();
+
+        // we want to delete the client area, dont care about borders really
+        XShapeCombineRectangles(display,
+                                m_win->window(), ShapeBounding,
+                                0, 0, /* offsets */
+                                &rect, 
+                                1,    /* number of rectangles */
+                                ShapeSubtract, /* op */
+                                2     /* ordering: YXSorted... only 1: doesn't matter */ );
+
+        XShapeCombineShape(display,
+                           m_win->window(), ShapeBounding,
+                           rect.x , rect.y, // xOff, yOff
+                           m_shapesource->window(),
+                           ShapeBounding, ShapeUnion);
+    }
+
+
+    CornerPixmaps &corners = s_corners[m_win->screenNumber()];
+#define SHAPECORNER(corner, x, y, shapekind)            \
+    XShapeCombineMask(App::instance()->display(), \
+                      m_win->window(),                  \
+                      shapekind,                        \
+                      x, y,                             \
+                      corners.corner.drawable(),      \
+                      ShapeSubtract); 
+
+    /**
+     * Set the top corners if the y offset is nonzero.
+     */
+    if (m_shapesource == 0 || m_shapesource_yoff != 0) {
+        if (m_shapeplaces & TOPLEFT) {
+            SHAPECORNER(topleft, 0, 0, ShapeClip);
+            SHAPECORNER(topleft, -bw, -bw, ShapeBounding);
+        }
+        if (m_shapeplaces & TOPRIGHT) {
+            SHAPECORNER(topright, width-8, 0, ShapeClip);
+            SHAPECORNER(topright, width+bw-8, -bw, ShapeBounding);
+        }
+    }
+
+    // note that the bottom corners y-vals are offset by 8 (the height of the corner pixmaps)
+    if (m_shapesource == 0 || (m_shapesource_yoff+(signed) m_shapesource->height()) < height
+        || m_shapesource_yoff >= height /* shaded */) {
+        if (m_shapeplaces & BOTTOMLEFT) {
+            SHAPECORNER(botleft, 0, height-8, ShapeClip);
+            SHAPECORNER(botleft, -bw, height+bw-8, ShapeBounding);
+        }
+        if (m_shapeplaces & BOTTOMRIGHT) {
+            SHAPECORNER(botright, width-8, height-8, ShapeClip);
+            SHAPECORNER(botright, width+bw-8, height+bw-8, ShapeBounding);
+        }
+    }
+
+#endif // SHAPE
+
+}
+
+void Shape::setWindow(FbWindow &win) {
+    m_win = &win;
+    update();
+}
+
+/**
+ * set the shape source to the given window.
+ * This is purely for client windows at the moment, where the offsets and height/width of the 
+ * target window and the source window are used to determine whether to shape a given corner.
+ *
+ * (note: xoffset will always be zero, and widths always match, so we ignore those)
+ * 
+ * i.e. if the yoffset is not zero, then the top corners are shaped.
+ * if the target height is bigger than the source plus yoffset, then the bottom corners are
+ * shaped.
+ *
+ * If *either* the top or bottom corners are not shaped due to this, but a shape source window
+ * is given, then the bounding shape has the borders alongside the source window deleted, otherwise
+ * they are left hanging outside the client's shape.
+ */
+void Shape::setShapeSource(FbWindow *win, int xoff, int yoff, bool always_update) {
+    if (win != 0 && !isShaped(*win)) {
+        win = 0;
+        if (m_shapesource == 0 && !always_update)
+            return;
+    }
+
+    // even if source is same, want to update the shape on it
+    m_shapesource = win;
+    m_shapesource_xoff = xoff;
+    m_shapesource_yoff = yoff;
+    update();
+}
+
+void Shape::setShapeOffsets(int xoff, int yoff) {
+    m_shapesource_xoff = xoff;
+    m_shapesource_yoff = yoff;
+    update();
+}
+
+void Shape::setShapeNotify(const FbWindow &win) {
+#ifdef SHAPE
+    XShapeSelectInput(App::instance()->display(),
+                      win.window(), ShapeNotifyMask);
+#endif // SHAPE
+}
+
+bool Shape::isShaped(const FbWindow &win) {
+    int shaped = 0;
+
+#ifdef SHAPE
+    int not_used;
+    unsigned int not_used2;
+    XShapeQueryExtents(App::instance()->display(),
+                       win.window(),
+                       &shaped,  /// bShaped
+                       &not_used, &not_used,  // xbs, ybs
+                       &not_used2, &not_used2, // wbs, hbs
+                       &not_used, // cShaped
+                       &not_used, &not_used, // xcs, ycs
+                       &not_used2, &not_used2); // wcs, hcs
+#endif // SHAPE
+
+    return (shaped != 0 ? true : false);
+}
+
+}; // end namespace FbTk