diff --git a/ChangeLog b/ChangeLog
index 8ba8cada..8f613a66 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,17 @@
+2024-02-24  Araki Ken  <arakiken@users.sf.net>
+
+	* cocoa.[hm], cocoatouch.m:
+	  Add hasAlpha to arguments of MLTermView::copyArea and view_copy_area().
+	  If hasAlpha is true, call CGCOntextSetBlendMode(kCGBlendModeNormal).
+
+	* quartz/ui_window.c:
+	  ui_window_copy_area() calls view_copy_area() with hasAlpha=1 if mask is not NULL.
+
+	* encodefilter/module/Makefile.in, configure.in:
+	  Link ../src/libmef.la to libmef_XXXX.la instead of @EF_CHARA_LO@.
+
+	* MLTermPty.java: Load MLTermPty.dll from ~/.mlterm/java all the time.
+
 2024-02-17  Araki Ken  <arakiken@users.sf.net>
 
 	* vt_parser.c:
diff --git a/configure b/configure
index 66acc9e3..37dd2f0f 100755
--- a/configure
+++ b/configure
@@ -644,7 +644,6 @@ XPG4_LIBS
 ALLOCA
 pobl_top_builddir_suffix
 pobl_top_srcdir_suffix
-EF_CHAR_LO
 MAKE_DIRS
 TABLE_CFLAGS
 mef_top_builddir_suffix
@@ -16999,7 +16998,7 @@ mingw*)
 	;;
 
 msys*)
-  # msys2
+	# msys2
 	# Extract the first word of "cygpath", so it can be a program name with args.
 set dummy cygpath; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
@@ -19717,6 +19716,7 @@ else
 fi
 
 
+
 	VT_PTY_OBJ="$VT_PTY_OBJ vt_pty_win32.o"
 else
 	VT_PTY_OBJ="vt_pty_unix.o"
@@ -23664,17 +23664,6 @@ if test "${MAKE_DIRS}" != "" ; then
 	mkdir -p ${MAKE_DIRS}
 fi
 
-#
-# --- check for undefined symbol ---
-#
-if test "x$allow_undefined_flag" = "xunsupported" ; then
-	# link ef_char.lo to module/*.dll to resolve addresses in creating dll.
-	EF_CHAR_LO="../src/ef_char.lo"
-else
-	EF_CHAR_LO=""
-fi
-
-
 #
 # ====> check for baselib <===
 #
diff --git a/configure.in b/configure.in
index bf1fe453..f0e3e8f7 100644
--- a/configure.in
+++ b/configure.in
@@ -1926,17 +1926,6 @@ if test "${MAKE_DIRS}" != "" ; then
 	mkdir -p ${MAKE_DIRS}
 fi
 
-#
-# --- check for undefined symbol ---
-#
-if test "x$allow_undefined_flag" = "xunsupported" ; then
-	# link ef_char.lo to module/*.dll to resolve addresses in creating dll.
-	EF_CHAR_LO="../src/ef_char.lo"
-else
-	EF_CHAR_LO=""
-fi
-AC_SUBST(EF_CHAR_LO)
-
 #
 # ====> check for baselib <===
 #
diff --git a/encodefilter/configure b/encodefilter/configure
index 45732f51..ae7bbc32 100755
--- a/encodefilter/configure
+++ b/encodefilter/configure
@@ -634,7 +634,6 @@ mef_top_builddir_suffix
 mef_top_srcdir_suffix
 DEXPORT
 LPOBL
-EF_CHAR_LO
 NO_UNDEFINED_FLAG
 MAKE_DIRS
 TABLE_CFLAGS
@@ -11681,13 +11680,10 @@ if test "x$allow_undefined_flag" = "xunsupported" ; then
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: not supported" >&5
 $as_echo "not supported" >&6; }
 	NO_UNDEFINED_FLAG="-no-undefined"
-	# link ef_char.lo to module/*.dll to resolve addresses in creating dll.
-	EF_CHAR_LO="../src/ef_char.lo"
 else
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: supported" >&5
 $as_echo "supported" >&6; }
 	NO_UNDEFINED_FLAG=""
-	EF_CHAR_LO=""
 fi
 if test "x${POBL_BUILDDIR}" != "x" ; then
 	LPOBL="${POBL_BUILDDIR}/src/libpobl.la"
@@ -11698,7 +11694,6 @@ fi
 
 
 
-
 if test "$with_gnu_ld" = "yes" ; then
 	DEXPORT="-Wl,--version-script=\$(VPATH)/dexport.map"
 fi
diff --git a/encodefilter/configure.in b/encodefilter/configure.in
index 8b9a508c..33bb2112 100644
--- a/encodefilter/configure.in
+++ b/encodefilter/configure.in
@@ -96,12 +96,9 @@ AC_MSG_CHECKING([for undefined symbol])
 if test "x$allow_undefined_flag" = "xunsupported" ; then
 	AC_MSG_RESULT([not supported])
 	NO_UNDEFINED_FLAG="-no-undefined"
-	# link ef_char.lo to module/*.dll to resolve addresses in creating dll.
-	EF_CHAR_LO="../src/ef_char.lo"
 else
 	AC_MSG_RESULT(supported)
 	NO_UNDEFINED_FLAG=""
-	EF_CHAR_LO=""
 fi
 if test "x${POBL_BUILDDIR}" != "x" ; then
 	LPOBL="${POBL_BUILDDIR}/src/libpobl.la"
@@ -109,7 +106,6 @@ else
 	LPOBL='-lpobl'
 fi
 AC_SUBST(NO_UNDEFINED_FLAG)
-AC_SUBST(EF_CHAR_LO)
 AC_SUBST(LPOBL)
 
 
diff --git a/encodefilter/module/Makefile.in b/encodefilter/module/Makefile.in
index 6fa6a52d..cf36d81e 100644
--- a/encodefilter/module/Makefile.in
+++ b/encodefilter/module/Makefile.in
@@ -32,21 +32,22 @@ LIBTOOL_INSTALL = $(LIBTOOL) --mode=install $(INSTALL)
 
 all: $(TARGET)
 
+# ../src/libmef.la is for ef_int_to_bytes()
 libmef_jajp.la: $(JAJP_TABLE_OBJ)
-	$(LIBTOOL_LINK) -o libmef_jajp.la $(JAJP_TABLE_OBJ:.o=.lo) @EF_CHAR_LO@ \
+	$(LIBTOOL_LINK) -o libmef_jajp.la $(JAJP_TABLE_OBJ:.o=.lo) ../src/libmef.la \
 	../src/ef_jis_property.lo \
 	-rpath $(libdir)/mef -module -avoid-version @NO_UNDEFINED_FLAG@
 
 libmef_kokr.la: $(KOKR_TABLE_OBJ)
-	$(LIBTOOL_LINK) -o libmef_kokr.la $(KOKR_TABLE_OBJ:.o=.lo) @EF_CHAR_LO@ \
+	$(LIBTOOL_LINK) -o libmef_kokr.la $(KOKR_TABLE_OBJ:.o=.lo) ../src/libmef.la \
 	-rpath $(libdir)/mef -module -avoid-version @NO_UNDEFINED_FLAG@
 
 libmef_zh.la: $(ZH_TABLE_OBJ)
-	$(LIBTOOL_LINK) -o libmef_zh.la $(ZH_TABLE_OBJ:.o=.lo) @EF_CHAR_LO@ \
+	$(LIBTOOL_LINK) -o libmef_zh.la $(ZH_TABLE_OBJ:.o=.lo) ../src/libmef.la \
 	-rpath $(libdir)/mef -module -avoid-version @NO_UNDEFINED_FLAG@
 
 libmef_8bits.la: $(BYTE_TABLE_OBJ)
-	$(LIBTOOL_LINK) -o libmef_8bits.la $(BYTE_TABLE_OBJ:.o=.lo) @EF_CHAR_LO@ \
+	$(LIBTOOL_LINK) -o libmef_8bits.la $(BYTE_TABLE_OBJ:.o=.lo) ../src/libmef.la \
 	-rpath $(libdir)/mef -module -avoid-version @NO_UNDEFINED_FLAG@
 
 install: install-la
diff --git a/java/README b/java/README
index e1b0a073..ab27a4d8 100644
--- a/java/README
+++ b/java/README
@@ -87,12 +87,10 @@ How to build & install mlterm co-operating with Java.
     Control+F2: Open new pty in current mlterm window.
     Control+F3: Switch to a next free pty.
 
-* On-line demo (win32 only)
-  http://mlterm.sourceforge.net/mltermlet.jnlp
-
   o If libeay32.dll exits in system foler (c:\windows\system) and it is not
-    compatible with the one which libssh2 depends on, this demo doesn't start.
+    compatible with the one which libssh2 depends on, mlterm doesn't start.
     Remove libeay32.dll in system folder in advance.
+
   o The path of RSA public key is %HOMEPATH%\mlterm\id_rsa.pub and the one of
     private key is %HOMEPATH%\mlterm\id_rsa by default.
 
diff --git a/java/mlterm/MLTermPty.java b/java/mlterm/MLTermPty.java
index 04a3468f..9d523ba7 100644
--- a/java/mlterm/MLTermPty.java
+++ b/java/mlterm/MLTermPty.java
@@ -16,6 +16,7 @@ public class MLTermPty {
 
   private static void loadLibraryFromJar() {
     Manifest mf = null;
+    long jarLastModified = (new File(System.getProperty("java.class.path"))).lastModified();
 
     try {
       Enumeration urls =
@@ -59,6 +60,12 @@ private static void loadLibraryFromJar() {
 
     byte[] buf = new byte[4096];
     for (int count = 0; count < files.length; count++) {
+      // jarLastModified == 0L means that jar file is not found.
+      if (jarLastModified > 0L &&
+          (new File(dir + files[count])).lastModified() >= jarLastModified) {
+        continue;
+      }
+
       if (true) {
         System.out.println("Writing " + dir + files[count]);
       }
@@ -131,18 +138,23 @@ private static void loadLibraryFromJar() {
   }
 
   static {
-    try {
-      if (DEBUG) {
-        System.out.println(System.getProperty("java.library.path"));
-      }
-
-      System.loadLibrary("MLTermPty");
-    } catch (UnsatisfiedLinkError e) {
-      if (DEBUG) {
-        e.printStackTrace();
-      }
+    if (DEBUG) {
+      System.out.println(System.getProperty("java.library.path"));
+    }
 
+    if (true) {
+      // Always load ~/.mlterm/java/*.dll
       loadLibraryFromJar();
+    } else {
+      try {
+        System.loadLibrary("MLTermPty");
+      } catch (UnsatisfiedLinkError e) {
+        if (DEBUG) {
+          e.printStackTrace();
+        }
+
+        loadLibraryFromJar();
+      }
     }
   }
 
diff --git a/uitoolkit/quartz/cocoa.h b/uitoolkit/quartz/cocoa.h
index 9d7d17e6..b9d6e0f0 100644
--- a/uitoolkit/quartz/cocoa.h
+++ b/uitoolkit/quartz/cocoa.h
@@ -28,7 +28,7 @@ void view_fill_with(void *view, ui_color_t *color, int x, int y, u_int width, u_
 void view_draw_rect_frame(void *view, ui_color_t *color, int x1, int y1, int x2, int y2);
 
 void view_copy_area(void *view, Pixmap src, int src_x, int src_y, u_int width, u_int height,
-                    int dst_x, int dst_y);
+                    int dst_x, int dst_y, int hasAlpha);
 
 void view_scroll(void *view, int src_x, int src_y, u_int width, u_int height, int dst_x, int dst_y);
 
diff --git a/uitoolkit/quartz/cocoa.m b/uitoolkit/quartz/cocoa.m
index a1a27d8f..83737ece 100644
--- a/uitoolkit/quartz/cocoa.m
+++ b/uitoolkit/quartz/cocoa.m
@@ -55,7 +55,8 @@ - (void)copyArea:(Pixmap)src
                 :(u_int)width
                 :(u_int)height
                 :(int)dst_x
-                :(int)dst_y;
+                :(int)dst_y
+                :(BOOL)hasAlpha;
 #if 0
 - (void)scroll:(int)src_x:(int)src_y:(u_int)width:(u_int)height:(int)dst_x:(int)dst_y;
 #endif
@@ -1251,13 +1252,19 @@ - (void)copyArea:(Pixmap)src
                 :(u_int)width
                 :(u_int)height
                 :(int)dst_x
-                :(int)dst_y {
+                :(int)dst_y
+                :(BOOL)hasAlpha {
   CGImageRef clipped = CGImageCreateWithImageInRect(
       src, CGRectMake(src_x, src_y, width, height));
-  CGContextDrawImage(
-      ctx,
-      CGRectMake(dst_x, ACTUAL_HEIGHT(uiwindow) - dst_y - height, width, height),
-      clipped);
+  if (hasAlpha) {
+    CGContextSetBlendMode(ctx, kCGBlendModeNormal /* kCGBlendModeMultiply */);
+  }
+  CGContextDrawImage(ctx,
+                     CGRectMake(dst_x, ACTUAL_HEIGHT(uiwindow) - dst_y - height, width, height),
+                     clipped);
+  if (hasAlpha) {
+    CGContextSetBlendMode(ctx, kCGBlendModeCopy);
+  }
   CGImageRelease(clipped);
 }
 
@@ -1419,8 +1426,8 @@ void view_draw_rect_frame(MLTermView *view, ui_color_t *color, int x1, int y1,
 }
 
 void view_copy_area(MLTermView *view, Pixmap src, int src_x, int src_y,
-                    u_int width, u_int height, int dst_x, int dst_y) {
-  [view copyArea:src:src_x:src_y:width:height:dst_x:dst_y];
+                    u_int width, u_int height, int dst_x, int dst_y, int hasAlpha) {
+  [view copyArea:src:src_x:src_y:width:height:dst_x:dst_y:hasAlpha];
 }
 
 void view_scroll(MLTermView *view, int src_x, int src_y, u_int width,
diff --git a/uitoolkit/quartz/cocoatouch.m b/uitoolkit/quartz/cocoatouch.m
index 1a8b9146..92fdf442 100644
--- a/uitoolkit/quartz/cocoatouch.m
+++ b/uitoolkit/quartz/cocoatouch.m
@@ -79,7 +79,8 @@ - (void)copyArea:(Pixmap)src
                 :(u_int)width
                 :(u_int)height
                 :(int)dst_x
-                :(int)dst_y;
+                :(int)dst_y
+                :(BOOL)hasAlpha;
 #if 0
 - (void)scroll:(int)src_x:(int)src_y:(u_int)width:(u_int)height:(int)dst_x:(int)dst_y;
 #endif
@@ -1307,13 +1308,19 @@ - (void)copyArea:(Pixmap)src
                 :(u_int)width
                 :(u_int)height
                 :(int)dst_x
-                :(int)dst_y {
+                :(int)dst_y
+                :(BOOL)hasAlpha {
   CGImageRef clipped = CGImageCreateWithImageInRect(
       src, CGRectMake(src_x, src_y, width, height));
-  CGContextDrawImage(
-      ctx,
-      CGRectMake(dst_x, ACTUAL_HEIGHT(uiwindow) - dst_y - height, width, height),
-      clipped);
+  if (hasAlpha) {
+    CGContextSetBlendMode(ctx, kCGBlendModeNormal /* kCGBlendModeMultiply */);
+  }
+  CGContextDrawImage(ctx,
+                     CGRectMake(dst_x, ACTUAL_HEIGHT(uiwindow) - dst_y - height, width, height),
+                     clipped);
+  if (hasAlpha) {
+    CGContextSetBlendMode(ctx, kCGBlendModeCopy);
+  }
   CGImageRelease(clipped);
 }
 
@@ -1449,8 +1456,8 @@ void view_draw_rect_frame(MLTermView *view, ui_color_t *color, int x1, int y1,
 }
 
 void view_copy_area(MLTermView *view, Pixmap src, int src_x, int src_y,
-                    u_int width, u_int height, int dst_x, int dst_y) {
-  [view copyArea:src:src_x:src_y:width:height:dst_x:dst_y];
+                    u_int width, u_int height, int dst_x, int dst_y, int hasAlpha) {
+  [view copyArea:src:src_x:src_y:width:height:dst_x:dst_y:hasAlpha];
 }
 
 void view_scroll(MLTermView *view, int src_x, int src_y, u_int width,
diff --git a/uitoolkit/quartz/ui_imagelib.c b/uitoolkit/quartz/ui_imagelib.c
index c65295ca..b88b16af 100644
--- a/uitoolkit/quartz/ui_imagelib.c
+++ b/uitoolkit/quartz/ui_imagelib.c
@@ -128,7 +128,7 @@ static int check_has_alpha(u_char *image, u_int width, u_int height) {
 
   for (y = 0; y < height; y++) {
     for (x = 0; x < width; x++, p += 4) {
-      if (*p != 0xff) {
+      if (*p < 0x80) {
         return 1;
       }
     }
diff --git a/uitoolkit/quartz/ui_window.c b/uitoolkit/quartz/ui_window.c
index ea5eecf6..3f7fb7df 100644
--- a/uitoolkit/quartz/ui_window.c
+++ b/uitoolkit/quartz/ui_window.c
@@ -187,17 +187,18 @@ static void clear_margin_area(ui_window_t *win) {
     }
 
     if (win->hmargin > 0 || right_margin > 0) {
-      view_copy_area(win->my_window, pic, src_x, src_y, win->hmargin, ACTUAL_HEIGHT(win), 0, 0);
+      view_copy_area(win->my_window, pic, src_x, src_y, win->hmargin, ACTUAL_HEIGHT(win), 0, 0, 0);
       view_copy_area(win->my_window, pic, src_x + win_width + win->hmargin, src_y,
-                     win->hmargin + right_margin, ACTUAL_HEIGHT(win), win_width + win->hmargin, 0);
+                     win->hmargin + right_margin, ACTUAL_HEIGHT(win), win_width + win->hmargin, 0,
+                     0);
     }
 
     if (win->vmargin > 0 || bottom_margin > 0) {
       view_copy_area(win->my_window, pic, src_x + win->hmargin, src_y, win_width, win->vmargin,
-                     win->hmargin, 0);
+                     win->hmargin, 0, 0);
       view_copy_area(win->my_window, pic, src_x + win->hmargin, src_y + win_height + win->vmargin,
                      win_width, win->vmargin + bottom_margin, win->hmargin,
-                     win_height + win->vmargin);
+                     win_height + win->vmargin, 0);
     }
   } else {
     if (win->hmargin > 0 || right_margin > 0) {
@@ -813,7 +814,7 @@ void ui_window_clear(ui_window_t *win, int x, int y, u_int width, u_int height)
       src_x = src_y = 0;
     }
 
-    view_copy_area(win->my_window, pic, src_x + x, src_y + y, width, height, x, y);
+    view_copy_area(win->my_window, pic, src_x + x, src_y + y, width, height, x, y, 0);
   } else {
     view_fill_with(win->my_window, &win->bg_color, x, y, width, height);
   }
@@ -1135,7 +1136,7 @@ int ui_window_copy_area(ui_window_t *win, Pixmap src, PixmapMask mask, int src_x
   }
 
   view_copy_area(win->my_window, src, src_x, src_y, width, height, dst_x + win->hmargin,
-                 dst_y + win->vmargin);
+                 dst_y + win->vmargin, mask ? 1 : 0);
 
   return 1;
 }