[GR-48895] Merge tag jdk-17.0.9+7.

PullRequest: labsjdk-ce-17/122

src/java.desktop/share/native/libfontmanager/freetypeScaler.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2007, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -530,7 +530,8 @@ Java_sun_font_FreetypeFontScaler_createScalerContextNative(
     if ((aa != TEXT_AA_ON) && (fm != TEXT_FM_ON) &&
         !context->doBold && !context->doItalize &&
         (context->transform.yx == 0) && (context->transform.xy == 0) &&
-        (context->transform.xx > 0) && (context->transform.yy > 0))
+        (context->transform.xx > 0) && (context->transform.yy > 0) &&
+        (context->transform.xx == context->transform.yy))
     {
         context->useSbits = 1;
     }

test/jdk/java/awt/font/FontScaling/StretchedFontTest.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.geom.AffineTransform;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+import java.util.Objects;
+import java.util.stream.Stream;
+
+import javax.imageio.ImageIO;
+
+import static java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment;
+import static java.awt.RenderingHints.KEY_TEXT_ANTIALIASING;
+import static java.awt.RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB;
+import static java.awt.RenderingHints.VALUE_TEXT_ANTIALIAS_OFF;
+import static java.awt.RenderingHints.VALUE_TEXT_ANTIALIAS_ON;
+import static java.awt.image.BufferedImage.TYPE_3BYTE_BGR;
+
+/*
+ * @test
+ * @bug 8312555
+ * @summary Verifies that hieroglyphs are stretched by AffineTransform.scale(2, 1)
+ * @run main StretchedFontTest
+ */
+public final class StretchedFontTest {
+    private static final String TEXT = "\u6F22";
+    private static final int FONT_SIZE = 20;
+
+    private static final Color BACKGROUND = Color.WHITE;
+    private static final Color[] FOREGROUNDS = {
+            new Color(0xFF000000, true),
+            new Color(0x7F000000, true)
+    };
+
+    private static final AffineTransform STRETCH_TRANSFORM =
+            AffineTransform.getScaleInstance(2.0, 1.0);
+
+    public static void main(String[] args) {
+        List<String> errors =
+                Arrays.stream(getLocalGraphicsEnvironment()
+                              .getAvailableFontFamilyNames(Locale.ENGLISH))
+                      .map(family -> new Font(family, Font.PLAIN, FONT_SIZE))
+                      .filter(font -> font.canDisplay(TEXT.codePointAt(0)))
+                      .map(font -> font.deriveFont(STRETCH_TRANSFORM))
+                      .flatMap(StretchedFontTest::testFont)
+                      .filter(Objects::nonNull)
+                      .toList();
+
+        if (!errors.isEmpty()) {
+            errors.forEach(System.err::println);
+            throw new Error(errors.size() + " failure(s) found;"
+                            + " the first one: " + errors.get(0));
+        }
+    }
+
+    /**
+     * Tests the font with a set of text antialiasing hints.
+     *
+     * @param font the font to test
+     * @return a stream of test results
+     * @see #testFont(Font, Object)
+     */
+    private static Stream<String> testFont(final Font font) {
+        return Stream.of(VALUE_TEXT_ANTIALIAS_OFF,
+                         VALUE_TEXT_ANTIALIAS_ON,
+                         VALUE_TEXT_ANTIALIAS_LCD_HRGB)
+                     .flatMap(hint -> testFont(font, hint));
+    }
+
+    /**
+     * Tests the font with the specified text antialiasing hint and a set of
+     * foreground colors.
+     *
+     * @param font the font to test
+     * @param hint the text antialiasing hint to test
+     * @return a stream of test results
+     * @see #testFont(Font, Object, Color)
+     */
+    private static Stream<String> testFont(final Font font, final Object hint) {
+        return Stream.of(FOREGROUNDS)
+                     .map(foreground -> testFont(font, hint, foreground));
+    }
+
+    /**
+     * Tests the font with the specified text antialiasing hint and
+     * foreground color. In case of failure, it saves the rendered
+     * image to a file.
+     *
+     * @param font the font to test
+     * @param hint the text antialiasing hint to test
+     * @param foreground the foreground color to use
+     * @return {@code null} if the text rendered correctly; otherwise,
+     *         a {@code String} with the font family name, the value of
+     *         the rendering hint and the color in hex
+     */
+    private static String testFont(final Font font,
+                                   final Object hint,
+                                   final Color foreground) {
+        final Dimension size = getTextSize(font);
+        final BufferedImage image =
+                new BufferedImage(size.width, size.height, TYPE_3BYTE_BGR);
+
+        final Graphics2D g2d = image.createGraphics();
+        try {
+            g2d.setColor(BACKGROUND);
+            g2d.fillRect(0, 0, size.width, size.height);
+
+            g2d.setRenderingHint(KEY_TEXT_ANTIALIASING, hint);
+            g2d.setColor(foreground);
+            g2d.setFont(font);
+            g2d.drawString(TEXT, 0, g2d.getFontMetrics(font).getAscent());
+        } finally {
+            g2d.dispose();
+        }
+
+        if (verifyImage(image)) {
+            return null;
+        }
+        String fontName = font.getFontName(Locale.ENGLISH);
+        String hintValue = getHintString(hint);
+        String hexColor = String.format("0x%08x", foreground.getRGB());
+        saveImage(image, fontName + "-" + hintValue + "-" + hexColor);
+        return "Font: " + fontName + ", Hint: " + hintValue + ", Color: " + hexColor;
+    }
+
+    /**
+     * Verifies the rendered image of the hieroglyph. The hieroglyph
+     * should be stretched across the entire width of the image.
+     * If the right half of the image contains only pixels of the background
+     * color, the hieroglyph isn't stretched correctly
+     * &mdash; it's a failure.
+     *
+     * @param image the image to verify
+     * @return {@code true} if the hieroglyph is stretched correctly; or
+     *         {@code false} if right half of the image contains only
+     *         background-colored pixels, which means the hieroglyph isn't
+     *         stretched.
+     */
+    private static boolean verifyImage(final BufferedImage image) {
+        final int width = image.getWidth();
+        final int height = image.getHeight();
+        for (int x = width / 2; x < width; x++) {
+            for (int y = 0; y < height; y++) {
+                if (image.getRGB(x, y) != BACKGROUND.getRGB()) {
+                    // Any other color but background means the glyph is stretched
+                    return true;
+                }
+            }
+        }
+
+        // The right side of the image is filled with the background color only,
+        // the glyph isn't stretched.
+        return false;
+    }
+
+    private static String getHintString(final Object hint) {
+        if (hint == VALUE_TEXT_ANTIALIAS_OFF) {
+            return "off";
+        } else if (hint == VALUE_TEXT_ANTIALIAS_ON) {
+            return "on";
+        } else if (hint == VALUE_TEXT_ANTIALIAS_LCD_HRGB) {
+            return "lcd";
+        } else {
+            throw new IllegalArgumentException("Unexpected hint: " + hint);
+        }
+    }
+
+    private static final BufferedImage dummyImage =
+            new BufferedImage(5, 5, TYPE_3BYTE_BGR);
+
+    private static Dimension getTextSize(final Font font) {
+        final Graphics g = dummyImage.getGraphics();
+        try {
+            return g.getFontMetrics(font)
+                    .getStringBounds(TEXT, g)
+                    .getBounds()
+                    .getSize();
+        } finally {
+            g.dispose();
+        }
+    }
+
+    private static void saveImage(final BufferedImage image,
+                                  final String fileName) {
+        try {
+            ImageIO.write(image,
+                          "png",
+                          new File(fileName + ".png"));
+        } catch (IOException ignored) {
+        }
+    }
+}