| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.fonts.truetype; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Tests {@link GlyfTable}. |
| */ |
| public class GlyfTableTestCase { |
| |
| private final static class DirData { |
| |
| final long offset; |
| final long length; |
| |
| DirData(long offset, long length) { |
| this.offset = offset; |
| this.length = length; |
| } |
| } |
| |
| private FontFileReader subsetReader; |
| |
| private long[] glyphOffsets; |
| |
| private FontFileReader originalFontReader; |
| |
| @Before |
| public void setUp() throws IOException { |
| originalFontReader = new FontFileReader("test/resources/fonts/DejaVuLGCSerif.ttf"); |
| } |
| |
| /** |
| * Tests that composed glyphs are included in the glyph subset if a composite glyph is used. |
| * |
| * @throws IOException if an I/O error occurs |
| */ |
| @Test |
| public void testPopulateGlyphsWithComposites() throws IOException { |
| // Glyph 408 -> U+01D8 "uni01D8" this is a composite glyph. |
| int[] composedIndices = setupTest(408); |
| |
| int[] expected = new int[composedIndices.length]; |
| expected[1] = 6; |
| expected[5] = 2; |
| expected[6] = 4; |
| |
| assertArrayEquals(expected, composedIndices); |
| } |
| |
| /** |
| * Tests that no glyphs are added if there are no composite glyphs the subset. |
| * |
| * @throws IOException if an I/O error occurs |
| */ |
| @Test |
| public void testPopulateNoCompositeGlyphs() throws IOException { |
| int[] composedIndices = setupTest(36, 37, 38); // "A", "B", "C" |
| int[] expected = new int[composedIndices.length]; |
| |
| // There should be NO composite glyphs |
| assertArrayEquals(expected, composedIndices); |
| } |
| |
| /** |
| * Tests that glyphs aren't remapped twice if the glyph before a composite glyph has 0-length. |
| * |
| * @throws IOException if an I/O error occurs |
| */ |
| @Test |
| public void testGlyphsNotRemappedTwice() throws IOException { |
| int composedGlyph = 12; |
| // The order of these glyph indices, must NOT be changed! (see javadoc above) |
| int[] composedIndices = setupTest(1, 2, 3, 16, 2014, 4, 7, 8, 13, 2015, composedGlyph); |
| |
| // There are 2 composed glyphs within the subset |
| int[] expected = new int[composedIndices.length]; |
| expected[10] = composedGlyph; |
| |
| assertArrayEquals(expected, composedIndices); |
| } |
| |
| /** |
| * Tests that the correct glyph is included in the subset, when a composite glyph composed of a |
| * composite glyph is used. |
| * |
| * @throws IOException if an I/O error occurs |
| */ |
| @Test |
| public void testSingleRecursionStep() throws IOException { |
| // Glyph 2077 -> U+283F "uni283F" this is composed of a composite glyph (recursive). |
| int[] composedIndices = setupTest(2077); |
| |
| int[] expected = new int[composedIndices.length]; |
| expected[1] = 2; |
| |
| assertArrayEquals(expected, composedIndices); |
| } |
| |
| private int[] setupTest(int... glyphIndices) throws IOException { |
| Map<Integer, Integer> glyphs = new HashMap<Integer, Integer>(); |
| int index = 0; |
| glyphs.put(0, index++); // Glyph 0 (.notdef) must ALWAYS be in the subset |
| |
| for (int glyphIndex : glyphIndices) { |
| glyphs.put(glyphIndex, index++); |
| } |
| setupSubsetReader(glyphs); |
| readLoca(); |
| |
| return retrieveIndicesOfComposedGlyphs(); |
| } |
| |
| private void setupSubsetReader(Map<Integer, Integer> glyphs) throws IOException { |
| TTFSubSetFile fontFile = new TTFSubSetFile(); |
| byte[] subsetFont = fontFile.readFont(originalFontReader, "Deja", glyphs); |
| InputStream intputStream = new ByteArrayInputStream(subsetFont); |
| subsetReader = new FontFileReader(intputStream); |
| } |
| |
| private void readLoca() throws IOException { |
| DirData loca = getTableData("loca"); |
| int numberOfGlyphs = (int) (loca.length - 4) / 4; |
| glyphOffsets = new long[numberOfGlyphs]; |
| subsetReader.seekSet(loca.offset); |
| |
| for (int i = 0; i < numberOfGlyphs; i++) { |
| glyphOffsets[i] = subsetReader.readTTFULong(); |
| } |
| } |
| |
| private int[] retrieveIndicesOfComposedGlyphs() throws IOException { |
| DirData glyf = getTableData("glyf"); |
| int[] composedGlyphIndices = new int[glyphOffsets.length]; |
| |
| for (int i = 0; i < glyphOffsets.length; i++) { |
| long glyphOffset = glyphOffsets[i]; |
| if (i != glyphOffsets.length - 1 && glyphOffset == glyphOffsets[i + 1]) { |
| continue; |
| } |
| subsetReader.seekSet(glyf.offset + glyphOffset); |
| short numberOfContours = subsetReader.readTTFShort(); |
| if (numberOfContours < 0) { |
| subsetReader.skip(8); |
| subsetReader.readTTFUShort(); // flags |
| int glyphIndex = subsetReader.readTTFUShort(); |
| composedGlyphIndices[i] = glyphIndex; |
| } |
| } |
| return composedGlyphIndices; |
| } |
| |
| private DirData getTableData(String tableName) throws IOException { |
| subsetReader.seekSet(0); |
| subsetReader.skip(12); |
| String name; |
| do { |
| name = subsetReader.readTTFString(4); |
| subsetReader.skip(4 * 3); |
| } while (!name.equals(tableName)); |
| |
| subsetReader.skip(-8); // We've found the table, go back to get the data we skipped over |
| return new DirData(subsetReader.readTTFLong(), subsetReader.readTTFLong()); |
| } |
| |
| private void assertArrayEquals(int[] expected, int[] actual) { |
| assertTrue(Arrays.equals(expected, actual)); |
| } |
| } |