Port visible bell to Android

* java/org/gnu/emacs/EmacsDrawRectangle.java (perform): Ignore
GC_INVERT.

* java/org/gnu/emacs/EmacsFillRectangle.java
(EmacsFillRectangle) <invertFilter>: New variable.
(perform): If the transfer mode is invert, copy the source
to itself with invertFilter as the color filter.

* java/org/gnu/emacs/EmacsGC.java (EmacsGC) <xorAlu, srcInAlu>:
Delete now-redundant ALUs.
(markDirty): Cease updating the paint's transfermode.

* java/org/gnu/emacs/EmacsSafThread.java (openDocument1): Fix
typo in documentation.

* src/android.c (android_blit_xor): Delete unused function.
(android_copy_area): Remove calls to unused blit functions.

* src/androidgui.h (enum android_gc_function): Rename XOR to
INVERT.

* src/androidterm.c (android_flash): Replace with GXinvert.

1 files changed, 2 insertions, 14 deletions

diff --git a/java/org/gnu/emacs/EmacsGC.java b/java/org/gnu/emacs/EmacsGC.java
index ec2b9c9e475..bb11f76c800 100644
--- a/java/org/gnu/emacs/EmacsGC.java
+++ b/java/org/gnu/emacs/EmacsGC.java
@@ -27,9 +27,7 @@ import android.graphics.Canvas;
 import android.graphics.ColorFilter;
 import android.graphics.PorterDuff.Mode;
 import android.graphics.PorterDuffColorFilter;
-import android.graphics.PorterDuffXfermode;
 import android.graphics.Shader.TileMode;
-import android.graphics.Xfermode;
 
 import android.graphics.drawable.BitmapDrawable;
 
@@ -40,8 +38,8 @@ import android.os.Build;
 
 public final class EmacsGC extends EmacsHandleObject
 {
-  public static final int GC_COPY = 0;
-  public static final int GC_XOR  = 1;
+  public static final int GC_COPY    = 0;
+  public static final int GC_INVERT  = 1;
 
   public static final int GC_FILL_SOLID			= 0;
   public static final int GC_FILL_OPAQUE_STIPPLED	= 1;
@@ -49,8 +47,6 @@ public final class EmacsGC extends EmacsHandleObject
   public static final int GC_LINE_SOLID			= 0;
   public static final int GC_LINE_ON_OFF_DASH		= 1;
 
-  public static final Xfermode xorAlu, srcInAlu;
-
   public int function, fill_style;
   public int foreground, background;
   public int clip_x_origin, clip_y_origin;
@@ -72,12 +68,6 @@ public final class EmacsGC extends EmacsHandleObject
      rectangles changed.  0 if there are no clip rectangles.  */
   public long clipRectID;
 
-  static
-  {
-    xorAlu = new PorterDuffXfermode (Mode.XOR);
-    srcInAlu = new PorterDuffXfermode (Mode.SRC_IN);
-  }
-
   /* The following fields are only set on immutable GCs.  */
 
   public
@@ -131,8 +121,6 @@ public final class EmacsGC extends EmacsHandleObject
     /* A line_width of 0 is equivalent to that of 1.  */
     gcPaint.setStrokeWidth (line_width < 1 ? 1 : line_width);
     gcPaint.setColor (foreground | 0xff000000);
-    gcPaint.setXfermode (function == GC_XOR
-			 ? xorAlu : srcInAlu);
 
     /* Update the stipple object with the new stipple bitmap, or delete
        it if the stipple has been cleared on systems too old to support