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diff --git a/java/org/gnu/emacs/EmacsFontDriver.java b/java/org/gnu/emacs/EmacsFontDriver.java
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+++ b/java/org/gnu/emacs/EmacsFontDriver.java
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+/* Font backend for Android terminals.  -*- c-file-style: "GNU" -*-
+
+Copyright (C) 2023 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or (at
+your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
+
+package org.gnu.emacs;
+
+import java.util.List;
+
+public abstract class EmacsFontDriver
+{
+  /* Font weights.  */
+  public static final int THIN		= 0;
+  public static final int ULTRA_LIGHT	= 40;
+  public static final int LIGHT		= 50;
+  public static final int SEMI_LIGHT	= 55;
+  public static final int REGULAR	= 80;
+  public static final int MEDIUM	= 100;
+  public static final int SEMI_BOLD	= 180;
+  public static final int BOLD		= 200;
+  public static final int EXTRA_BOLD	= 205;
+  public static final int BLACK		= 210;
+  public static final int ULTRA_HEAVY	= 250;
+
+  /* Font slants.  */
+  public static final int REVERSE_OBLIQUE	= 0;
+  public static final int REVERSE_ITALIC	= 10;
+  public static final int NORMAL		= 100;
+  public static final int ITALIC		= 200;
+  public static final int OBLIQUE		= 210;
+
+  /* Font widths.  */
+  public static final int ULTRA_CONDENSED	= 50;
+  public static final int EXTRA_CONDENSED	= 63;
+  public static final int CONDENSED		= 75;
+  public static final int SEMI_CONDENSED	= 87;
+  public static final int UNSPECIFIED		= 100;
+  public static final int SEMI_EXPANDED		= 113;
+  public static final int EXPANDED		= 125;
+  public static final int EXTRA_EXPANDED	= 150;
+  public static final int ULTRA_EXPANDED	= 200;
+
+  /* Font spacings.  */
+  public static final int PROPORTIONAL	= 0;
+  public static final int DUAL		= 90;
+  public static final int MONO		= 100;
+  public static final int CHARCELL	= 110;
+
+  public class FontSpec
+  {
+    /* The fields below mean the same as they do in enum
+       font_property_index in font.h.  */
+
+    public String foundry;
+    public String family;
+    public String adstyle;
+    public String registry;
+    public Integer width;
+    public Integer weight;
+    public Integer slant;
+    public Integer size;
+    public Integer spacing;
+    public Integer avgwidth;
+
+    @Override
+    public String
+    toString ()
+    {
+      return ("foundry: " + foundry
+	      + " family: " + family
+	      + " adstyle: " + adstyle
+	      + " registry: " + registry
+	      + " width: " + width
+	      + " weight: " + weight
+	      + " slant: " + slant
+	      + " spacing: " + spacing
+	      + " avgwidth: " + avgwidth);
+    }
+  };
+
+  public class FontMetrics
+  {
+    public short lbearing;
+    public short rbearing;
+    public short width;
+    public short ascent;
+    public short descent;
+  }
+
+  public class FontEntity extends FontSpec
+  {
+    /* No extra fields here.  */
+  };
+
+  public abstract class FontObject extends FontSpec
+  {
+    public int minWidth;
+    public int maxWidth;
+    public int pixelSize;
+    public int height;
+    public int spaceWidth;
+    public int averageWidth;
+    public int ascent;
+    public int descent;
+    public int underlineThickness;
+    public int underlinePosition;
+    public int baselineOffset;
+    public int relativeCompose;
+    public int defaultAscent;
+    public int encodingCharset;
+    public int repertoryCharset;
+
+    public
+    FontObject ()
+    {
+      encodingCharset = -1;
+      repertoryCharset = -1;
+    }
+  };
+
+  /* These mean the same as they do in struct font_driver.  */
+  public abstract FontEntity[] list (FontSpec fontSpec);
+  public abstract FontEntity match (FontSpec fontSpec);
+  public abstract String[] listFamilies ();
+  public abstract FontObject openFont (FontEntity fontEntity, int pixelSize);
+  public abstract int hasChar (FontSpec font, char charCode);
+  public abstract void textExtents (FontObject font, int code[],
+				    FontMetrics fontMetrics[]);
+  public abstract int encodeChar (FontObject fontObject, char charCode);
+
+  public static EmacsFontDriver
+  createFontDriver ()
+  {
+    return new EmacsSdk7FontDriver ();
+  }
+};