* src/graphics.c:

+ Resize handling in the ncurses and slang drivers.

configure.ac

@@ -15,6 +15,7 @@ AC_PROG_RANLIB
 
 AC_C_CONST
 AC_C_INLINE
+AC_TYPE_SIGNAL
 
 dnl AC_PROG_EGREP only exists in autoconf 2.54+, so we use AC_EGREP_CPP right
 dnl now otherwise it might be set in an obscure if statement.
@@ -40,8 +41,10 @@ dnl conditional builds
 AC_ARG_ENABLE(doc,
   [  --enable-doc            build documentation (needs doxygen and LaTeX)])
 
-AC_CHECK_HEADERS(sys/time.h inttypes.h endian.h unistd.h)
-AC_CHECK_FUNCS(vsnprintf _vsnprintf getenv putenv strcasecmp usleep gettimeofday)
+AC_CHECK_HEADERS(signal.h sys/ioctl.h sys/time.h inttypes.h endian.h unistd.h)
+AC_CHECK_FUNCS(signal ioctl vsnprintf getenv putenv strcasecmp)
+AC_CHECK_FUNCS(usleep gettimeofday)
+
 AC_MSG_CHECKING(for Sleep)
 AC_TRY_COMPILE([#include <windows.h>],[Sleep(42);],
  [AC_MSG_RESULT(yes)

msvc/config.h

@@ -10,6 +10,8 @@
 #define HAVE_MEMORY_H 1
 /* #undef HAVE_NCURSES_H */
 #define HAVE_PUTENV 1
+/* #undef HAVE_SIGNAL */
+/* #undef HAVE_SIGNAL_H */
 /* #undef HAVE_SLANG_H */
 /* #undef HAVE_SLANG_SLANG_H */
 #define HAVE_SLEEP 1
@@ -18,14 +20,15 @@
 /* #undef HAVE_STRCASECMP */
 #define HAVE_STRINGS_H 1
 #define HAVE_STRING_H 1
+/* #undef HAVE_SYS_IOCTL_H */
 #define HAVE_SYS_STAT_H 1
+/* #undef HAVE_SYS_TIME_H */
 #define HAVE_SYS_TYPES_H 1
 /* #undef HAVE_UNISTD_H */
 /* #undef HAVE_USLEEP */
 /* #undef HAVE_VSNPRINTF */
 #define HAVE_WINDOWS_H 1
 /* #undef HAVE_X11_XKBLIB_H */
-#define HAVE__VSNPRINTF 1
 /* #undef NO_MINUS_C_MINUS_O */
 #define PACKAGE "libcaca"
 #define PACKAGE_BUGREPORT ""
@@ -33,6 +36,7 @@
 #define PACKAGE_STRING ""
 #define PACKAGE_TARNAME ""
 #define PACKAGE_VERSION ""
+/* #undef RETSIGTYPE */
 /* #undef SCREENUPDATE_IN_PC_H */
 #define STDC_HEADERS 1
 /* #undef USE_CONIO */

src/graphics.c

@@ -69,6 +69,13 @@ typedef unsigned char uint8_t;
 #endif
 #include <stdarg.h>
 
+#if defined(HAVE_SIGNAL_H)
+#   include <signal.h>
+#endif
+#if defined(HAVE_SYS_IOCTL_H)
+#   include <sys/ioctl.h>
+#endif
+
 #include "caca.h"
 #include "caca_internals.h"
 
@@ -239,6 +246,10 @@ static void caca_handle_resize(void);
 static void slang_init_palette(void);
 #endif
 
+#if defined(HAVE_SIGNAL) && (defined(USE_NCURSES) || defined(USE_SLANG))
+static RETSIGTYPE sigwinch_handler(int);
+#endif
+
 #if defined(USE_X11)
 static int x11_error_handler(Display *, XErrorEvent *);
 #endif
@@ -563,6 +574,10 @@ void caca_clear(void)
 #if !defined(_DOXYGEN_SKIP_ME)
 int _caca_init_graphics(void)
 {
+#if defined(HAVE_SIGNAL) && (defined(USE_NCURSES) || defined(USE_SLANG))
+    signal(SIGWINCH, sigwinch_handler);
+#endif
+
 #if defined(USE_SLANG)
     if(_caca_driver == CACA_DRIVER_SLANG)
     {
@@ -1202,23 +1217,29 @@ static void caca_handle_resize(void)
     _caca_width = _caca_new_width;
     _caca_height = _caca_new_height;
 
-    free(_caca_empty_line);
-    _caca_empty_line = malloc(_caca_width + 1);
-    memset(_caca_empty_line, ' ', _caca_width);
-    _caca_empty_line[_caca_width] = '\0';
+    if(_caca_width != old_width)
+    {
+        free(_caca_empty_line);
+        _caca_empty_line = malloc(_caca_width + 1);
+        memset(_caca_empty_line, ' ', _caca_width);
+        _caca_empty_line[_caca_width] = '\0';
 
-    free(_caca_scratch_line);
-    _caca_scratch_line = malloc(_caca_width + 1);
+        free(_caca_scratch_line);
+        _caca_scratch_line = malloc(_caca_width + 1);
+    }
 
 #if defined(USE_SLANG)
     if(_caca_driver == CACA_DRIVER_SLANG)
     {
+        SLsmg_reinit_smg();
     }
     else
 #endif
 #if defined(USE_NCURSES)
     if(_caca_driver == CACA_DRIVER_NCURSES)
     {
+        resize_term(_caca_height, _caca_width);
+        wrefresh(curscr);
     }
     else
 #endif
@@ -1311,3 +1332,36 @@ static int x11_error_handler(Display *dpy, XErrorEvent *event)
 }
 #endif
 
+#if defined(HAVE_SIGNAL) && (defined(USE_NCURSES) || defined(USE_SLANG))
+static RETSIGTYPE sigwinch_handler(int sig)
+{
+    struct winsize size;
+
+#if defined(USE_SLANG)
+    if(_caca_driver == CACA_DRIVER_SLANG)
+    {
+        SLtt_get_screen_size();
+        _caca_new_width = SLtt_Screen_Cols;
+        _caca_new_height = SLtt_Screen_Rows;
+    }
+    else
+#endif
+#if defined(USE_NCURSES)
+    if(_caca_driver == CACA_DRIVER_NCURSES)
+    {
+        if(ioctl(fileno(stdout), TIOCGWINSZ, &size) == 0)
+        {
+            _caca_new_width = size.ws_col;
+            _caca_new_height = size.ws_row;
+        }
+    }
+    else
+#endif
+    {
+        /* Dummy */
+    }
+
+    signal(SIGWINCH, sigwinch_handler);;
+}
+#endif
+