1 /*

     2  * Copyright 2016 JetBrains s.r.o.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 /* @test

    24  * @bug 8169202

    25  * @summary verify font fallback for surrogate pairs on macOS

    26  * @requires os.family == "mac"

    27  */

    28 

    29 import java.awt.Color;

    30 import java.awt.Font;

    31 import java.awt.Graphics2D;

    32 import java.awt.font.GlyphVector;

    33 import java.awt.image.BufferedImage;

    34 import java.util.function.Consumer;

    35 

    36 public class SurrogatesFallbackTest {

    37     private static final int CHARACTER = 0x1d400; // MATHEMATICAL BOLD CAPITAL A

    38     private static final Font FONT = new Font("Menlo", // expected to fallback to STIXGeneral for the character above

    39                                               Font.PLAIN,

    40                                               12);

    41     private static final int IMAGE_WIDTH = 20;

    42     private static final int IMAGE_HEIGHT = 20;

    43     private static final int GLYPH_X = 5;

    44     private static final int GLYPH_Y = 15;

    45 

    46     public static void main(String[] args) {

    47         BufferedImage noGlyph = createImage(g -> {});

    48         BufferedImage missingGlyph = createImage(g -> {

    49             GlyphVector gv = FONT.createGlyphVector(g.getFontRenderContext(), new int[]{FONT.getMissingGlyphCode()});

    50             g.drawGlyphVector(gv, GLYPH_X, GLYPH_Y);

    51         });

    52         BufferedImage surrogateCharGlyph = createImage(g -> {

    53             g.setFont(FONT);

    54             g.drawString(new String(Character.toChars(CHARACTER)), GLYPH_X, GLYPH_Y);

    55         });

    56 

    57         if (imagesAreEqual(surrogateCharGlyph, noGlyph)) {

    58             throw new RuntimeException("Character was not rendered");

    59         }

    60         if (imagesAreEqual(surrogateCharGlyph, missingGlyph)) {

    61             throw new RuntimeException("Character is rendered as missing");

    62         }

    63     }

    64 

    65     private static BufferedImage createImage(Consumer<Graphics2D> drawing) {

    66         BufferedImage image = new BufferedImage(IMAGE_WIDTH, IMAGE_HEIGHT, BufferedImage.TYPE_INT_RGB);

    67         Graphics2D g = image.createGraphics();

    68         g.setColor(Color.white);

    69         g.fillRect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT);

    70         g.setColor(Color.black);

    71         drawing.accept(g);

    72         g.dispose();

    73         return image;

    74     }

    75 

    76     private static boolean imagesAreEqual(BufferedImage i1, BufferedImage i2) {

    77         if (i1.getWidth() != i2.getWidth() || i1.getHeight() != i2.getHeight()) return false;

    78         for (int i = 0; i < i1.getWidth(); i++) {

    79             for (int j = 0; j < i1.getHeight(); j++) {

    80                 if (i1.getRGB(i, j) != i2.getRGB(i, j)) {

    81                     return false;

    82                 }

    83             }

    84         }

    85         return true;

    86     }

    87 }

    88