russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
80 lines
3.1 KiB
Java
80 lines
3.1 KiB
Java
/*
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* Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8148334 8377937
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* @summary Checks behavior of GlyphVector.getGlyphMetrics(int) with rotated fonts.
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*/
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import java.awt.Font;
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import java.awt.GraphicsEnvironment;
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import java.awt.font.FontRenderContext;
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import java.awt.font.GlyphMetrics;
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import java.awt.font.GlyphVector;
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import java.awt.geom.AffineTransform;
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public class GlyphMetricsRotatedFontTest {
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public static void main(String[] args) {
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String text = "The quick brown \r\n fox JUMPS over \t the lazy dog.";
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FontRenderContext frc = new FontRenderContext(null, true, true);
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GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
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String[] names = ge.getAvailableFontFamilyNames();
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for (String name : names) {
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Font normal = new Font(name, Font.PLAIN, 60);
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if (normal.canDisplayUpTo("AZaz09") != -1) {
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continue;
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}
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double theta = 0.5; // about 30 degrees
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AffineTransform tx = AffineTransform.getRotateInstance(theta);
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Font rotated = normal.deriveFont(tx);
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GlyphVector gv1 = normal.createGlyphVector(frc, text);
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GlyphVector gv2 = rotated.createGlyphVector(frc, text);
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for (int i = 0; i < gv1.getNumGlyphs(); i++) {
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GlyphMetrics gm1 = gv1.getGlyphMetrics(i);
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GlyphMetrics gm2 = gv2.getGlyphMetrics(i);
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assertEqual(0, gm1.getAdvanceY(), 0, name + " normal y", i);
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double expectedX = Math.cos(theta) * gm1.getAdvanceX();
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double expectedY = Math.sin(theta) * gm1.getAdvanceX();
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assertEqual(expectedX, gm2.getAdvanceX(), 1, name + " rotated x", i);
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assertEqual(expectedY, gm2.getAdvanceY(), 1, name + " rotated y", i);
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}
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}
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}
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private static void assertEqual(double d1, double d2, double variance,
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String scenario, int index) {
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if (Math.abs(d1 - d2) > variance) {
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String msg = String.format("%s for index %d: %f != %f", scenario, index, d1, d2);
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throw new RuntimeException(msg);
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}
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}
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}
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