Author: manolo
Date: 2011-10-04 05:55:52 -0700 (Tue, 04 Oct 2011)
New Revision: 9125
Log:
Backport from 1.3: load libXrand.so dynamic library at run time.
Modified:
branches/branch-3.0/configure.in
branches/branch-3.0/include/configh.in
branches/branch-3.0/src/fltk3/x11.cxx
Modified: branches/branch-3.0/configure.in
===================================================================
--- branches/branch-3.0/configure.in 2011-10-04 09:31:42 UTC (rev 9124)
+++ branches/branch-3.0/configure.in 2011-10-04 12:55:52 UTC (rev 9125)
@@ -981,16 +981,6 @@
LIBS="-lXext $LIBS")
fi
- dnl Check for the XRandR extension unless disabled...
- AC_ARG_ENABLE(xrandr, [ --enable-xrandr turn on XRandR
support [default=yes]])
-
- if test x$enable_xrandr != xno; then
- AC_CHECK_HEADER(X11/extensions/Xrandr.h, AC_DEFINE(HAVE_XRANDR),,
- [#include <X11/Xlib.h>])
- AC_CHECK_LIB(Xrandr, XRRQueryExtension,
- LIBS="-lXrandr $LIBS")
- fi
-
dnl Check for overlay visuals...
AC_PATH_PROG(XPROP, xprop)
AC_CACHE_CHECK(for X overlay visuals, ac_cv_have_overlay,
@@ -1324,9 +1314,6 @@
if test x$enable_xdbe != xno; then
graphics="$graphics+Xdbe"
fi
- if test x$enable_xrandr != xno; then
- graphics="$graphics+Xrandr"
- fi
if test x$enable_xinerama != xno; then
graphics="$graphics+Xinerama"
fi
Modified: branches/branch-3.0/include/configh.in
===================================================================
--- branches/branch-3.0/include/configh.in 2011-10-04 09:31:42 UTC (rev
9124)
+++ branches/branch-3.0/include/configh.in 2011-10-04 12:55:52 UTC (rev
9125)
@@ -93,14 +93,6 @@
#define HAVE_XINERAMA 0
/*
- * HAVE_XRANDR
- *
- * Do we have the Xrandr library to support runtime update of multi-head
displays?
- */
-
-#define HAVE_XRANDR 0
-
-/*
* USE_XFT
*
* Use the new Xft library to draw anti-aliased text.
Modified: branches/branch-3.0/src/fltk3/x11.cxx
===================================================================
--- branches/branch-3.0/src/fltk3/x11.cxx 2011-10-04 09:31:42 UTC (rev
9124)
+++ branches/branch-3.0/src/fltk3/x11.cxx 2011-10-04 12:55:52 UTC (rev
9125)
@@ -53,9 +53,13 @@
# include <X11/Xlocale.h>
# include <X11/Xlib.h>
# include <X11/keysym.h>
-#ifdef HAVE_XRANDR
-#include <X11/extensions/Xrandr.h>
-static int randrEventBase = -1;
+#define USE_XRANDR 1 // means attempt to dynamically load libXrandr.so
+#if USE_XRANDR
+#include <dlfcn.h>
+#define RRScreenChangeNotifyMask (1L << 0) // from X11/extensions/Xrandr.h
+#define RRScreenChangeNotify 0 // from X11/extensions/Xrandr.h
+static void *libxrandr_addr; // run-time address of libXrandr.so
+static int randrEventBase; // base of RandR-defined events
#endif
static fltk3::XlibGraphicsDriver fl_xlib_driver;
@@ -653,11 +657,18 @@
#if !USE_COLORMAP
fltk3::visual(fltk3::RGB);
#endif
-#ifdef HAVE_XRANDR
- int error_base;
- if (XRRQueryExtension(d, &randrEventBase, &error_base))
- XRRSelectInput(d, RootWindow(d, fl_screen), RRScreenChangeNotifyMask);
- else randrEventBase = -1;
+#if USE_XRANDR
+ libxrandr_addr = dlopen("libXrandr.so", RTLD_LAZY);
+ if (libxrandr_addr) {
+ int error_base;
+ typedef Bool (*XRRQueryExtension_type)(Display*, int*, int*);
+ typedef void (*XRRSelectInput_type)(Display*, Window, int);
+ XRRQueryExtension_type XRRQueryExtension_f =
(XRRQueryExtension_type)dlsym(libxrandr_addr, "XRRQueryExtension");
+ XRRSelectInput_type XRRSelectInput_f =
(XRRSelectInput_type)dlsym(libxrandr_addr, "XRRSelectInput");
+ if (XRRQueryExtension_f && XRRSelectInput_f && XRRQueryExtension_f(d,
&randrEventBase, &error_base))
+ XRRSelectInput_f(d, RootWindow(d, fl_screen), RRScreenChangeNotifyMask);
+ else libxrandr_addr = NULL;
+ }
#endif
}
@@ -943,9 +954,8 @@
if ( XFilterEvent((XEvent *)&xevent, 0) )
return(1);
-#ifdef HAVE_XRANDR
- if( randrEventBase >= 0 && xevent.type == randrEventBase +
RRScreenChangeNotify) {
- XRRUpdateConfiguration (&xevent);
+#if USE_XRANDR
+ if( libxrandr_addr && xevent.type == randrEventBase + RRScreenChangeNotify) {
fltk3::call_screen_init();
fl_init_workarea();
fltk3::handle(fltk3::SCREEN_CONFIGURATION_CHANGED, NULL);
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