caca: add Xlib initialization

(cherry picked from commit 760668e7a6accb3046207b7ae426e509cf73dc7f)

modules/video_output/Modules.am

@@ -135,6 +135,9 @@ libvlc_LTLIBRARIES += $(LTLIBegl)
 libcaca_plugin_la_SOURCES = caca.c
 libcaca_plugin_la_CFLAGS = $(AM_CFLAGS) $(CACA_CFLAGS)
 libcaca_plugin_la_LIBADD = $(AM_LIBADD) $(CACA_LIBS)
+if !HAVE_WIN32
+libcaca_plugin_la_LIBADD += $(X_LIBS) $(X_PRE_LIBS) -lX11
+endif
 libcaca_plugin_la_DEPENDENCIES =
 EXTRA_LTLIBRARIES += libcaca_plugin.la
 libvlc_LTLIBRARIES += $(LTLIBcaca)

modules/video_output/caca.c

@@ -34,6 +34,12 @@
 #include <vlc_plugin.h>
 #include <vlc_vout_display.h>
 #include <vlc_picture_pool.h>
+#ifndef WIN32
+# ifdef X_DISPLAY_MISSING
+#  error Xlib required due to XInitThreads
+# endif
+# include <vlc_xlib.h>
+#endif
 
 #include <caca.h>
 
@@ -57,7 +63,7 @@ vlc_module_end()
  *****************************************************************************/
 static picture_pool_t *Pool  (vout_display_t *, unsigned);
 static void           Prepare(vout_display_t *, picture_t *, subpicture_t *);
-static void           Display(vout_display_t *, picture_t *, subpicture_t *);
+static void    PictureDisplay(vout_display_t *, picture_t *, subpicture_t *);
 static int            Control(vout_display_t *, int, va_list);
 
 /* */
@@ -82,6 +88,10 @@ static int Open(vlc_object_t *object)
     vout_display_t *vd = (vout_display_t *)object;
     vout_display_sys_t *sys;
 
+#ifndef X_DISPLAY_MISSING
+    if (!vlc_xlib_init(object))
+        return VLC_EGENERIC;
+#endif
 #if defined(WIN32) && !defined(UNDER_CE)
     CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
     SMALL_RECT rect;
@@ -180,7 +190,7 @@ static int Open(vlc_object_t *object)
 
     vd->pool    = Pool;
     vd->prepare = Prepare;
-    vd->display = Display;
+    vd->display = PictureDisplay;
     vd->control = Control;
     vd->manage  = Manage;
 
@@ -284,7 +294,7 @@ static void Prepare(vout_display_t *vd, picture_t *picture, subpicture_t *subpic
 /**
  * Display a picture
  */
-static void Display(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture)
+static void PictureDisplay(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture)
 {
     Refresh(vd);
     picture_Release(picture);