Include a stripped-down version of FLTK in tree and add a USE_INCLUDED_FLTK option to build against it.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4603 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/fltk/src/fl_overlay_visual.cxx b/common/fltk/src/fl_overlay_visual.cxx
new file mode 100644
index 0000000..392898f
--- /dev/null
+++ b/common/fltk/src/fl_overlay_visual.cxx
@@ -0,0 +1,105 @@
+//
+// "$Id: fl_overlay_visual.cxx 7903 2010-11-28 21:06:39Z matt $"
+//
+// X overlay support for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2010 by Bill Spitzak and others.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+// Please report all bugs and problems on the following page:
+//
+// http://www.fltk.org/str.php
+//
+
+// Return an overlay visual, if any. Also allocate a colormap and
+// record the depth for fl_color() to use.
+// Another disgusting X interface, based on code extracted and
+// purified with great difficulty from XLayerUtil.cxx:
+
+#include <config.h>
+#if HAVE_OVERLAY
+#include <FL/Fl.H>
+#include <FL/x.H>
+
+// SERVER_OVERLAY_VISUALS property element:
+struct OverlayInfo {
+ long overlay_visual;
+ long transparent_type;
+ long value;
+ long layer;
+};
+
+extern Colormap fl_overlay_colormap;
+extern XVisualInfo* fl_overlay_visual;
+extern ulong fl_transparent_pixel;
+
+XVisualInfo *fl_find_overlay_visual() {
+ static char beenhere;
+ if (beenhere) return fl_overlay_visual;
+ beenhere = 1;
+
+ fl_open_display();
+ Atom overlayVisualsAtom =
+ XInternAtom(fl_display,"SERVER_OVERLAY_VISUALS",1);
+ if (!overlayVisualsAtom) return 0;
+ OverlayInfo *overlayInfo;
+ ulong sizeData, bytesLeft;
+ Atom actualType;
+ int actualFormat;
+ if (XGetWindowProperty(fl_display, RootWindow(fl_display, fl_screen),
+ overlayVisualsAtom, 0L, 10000L, False,
+ overlayVisualsAtom, &actualType, &actualFormat,
+ &sizeData, &bytesLeft,
+ (unsigned char **) &overlayInfo)) return 0;
+
+ if (actualType == overlayVisualsAtom && actualFormat == 32) {
+ int n = int(sizeData/4);
+ XVisualInfo* v = 0;
+ // find the greatest depth that has a transparent pixel:
+ for (int i = 0; i < n; i++) {
+ if (overlayInfo[i].transparent_type != 1) continue;
+ if (overlayInfo[i].layer <= 0) continue;
+ XVisualInfo templt;
+ templt.visualid = overlayInfo[i].overlay_visual;
+ int num;
+ XVisualInfo *v1=XGetVisualInfo(fl_display, VisualIDMask, &templt, &num);
+ if (v1->screen == fl_screen && v1->c_class == PseudoColor
+ && (!v || v1->depth > v->depth && v1->depth <= 8)) {
+ if (v) XFree((char*)v);
+ v = v1;
+ fl_transparent_pixel = overlayInfo[i].value;
+ } else {
+ XFree((char*)v1);
+ }
+ }
+ if (v) {
+ fl_overlay_visual = v;
+ fl_overlay_colormap =
+ XCreateColormap(fl_display, RootWindow(fl_display, fl_screen),
+ v->visual, AllocNone);
+ }
+ }
+ XFree((char*)overlayInfo);
+ //printf("overlay visual %ld selected\n", fl_overlay_visual->visualid);
+ return fl_overlay_visual;
+}
+
+#endif
+
+//
+// End of "$Id: fl_overlay_visual.cxx 7903 2010-11-28 21:06:39Z matt $".
+//