David Kuettel
101 lines
3.6 KiB
Java
101 lines
3.6 KiB
Java
package com.google.typography.font.compression;
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import com.google.common.collect.ImmutableSet;
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import com.google.typography.font.sfntly.Font;
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import com.google.typography.font.sfntly.FontFactory;
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import com.google.typography.font.sfntly.Tag;
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import com.google.typography.font.sfntly.data.ReadableFontData;
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import com.google.typography.font.tools.conversion.eot.HdmxEncoder;
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import java.io.ByteArrayOutputStream;
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import java.util.Arrays;
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import java.util.Set;
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/**
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* Font utility methods
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*
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* @author Raph Levien
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*/
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public class FontUtil {
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public static Font.Builder stripTags(Font srcFont, Set<Integer> removeTags) {
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FontFactory fontFactory = FontFactory.getInstance();
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Font.Builder fontBuilder = fontFactory.newFontBuilder();
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for (Integer tag : srcFont.tableMap().keySet()) {
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if (!removeTags.contains(tag)) {
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fontBuilder.newTableBuilder(tag, srcFont.getTable(tag).readFontData());
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}
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}
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return fontBuilder;
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}
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public static Font.Builder preprocessMtxGlyf(Font srcFont, String options) {
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Font.Builder fontBuilder = stripTags(srcFont, ImmutableSet.<Integer>of());
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GlyfEncoder glyfEncoder = new GlyfEncoder(options);
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glyfEncoder.encode(srcFont);
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addTableBytes(fontBuilder, Tag.intValue(new byte[]{'g', 'l', 'z', '1'}),
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glyfEncoder.getGlyfBytes());
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'l', 'o', 'c', 'z'}),
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glyfEncoder.getLocaBytes());
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if (!Arrays.asList(options.split(",")).contains("reslice")) {
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'g', 'l', 'z', '2'}),
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glyfEncoder.getCodeBytes());
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'g', 'l', 'z', '3'}),
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glyfEncoder.getPushBytes());
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}
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return fontBuilder;
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}
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public static Font.Builder preprocessHmtx(Font srcFont) {
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Font.Builder fontBuilder = stripTags(srcFont, ImmutableSet.of(Tag.hmtx));
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'h', 'm', 't', 'z'}),
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toBytes(AdvWidth.encode(srcFont)));
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return fontBuilder;
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}
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public static Font.Builder preprocessHdmx(Font srcFont) {
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Font.Builder fontBuilder = stripTags(srcFont, ImmutableSet.of(Tag.hdmx));
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if (srcFont.hasTable(Tag.hdmx)) {
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addTableBytes(fontBuilder, Tag.hdmx, toBytes(new HdmxEncoder().encode(srcFont)));
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}
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return fontBuilder;
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}
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public static Font.Builder preprocessCmap(Font srcFont) {
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Font.Builder fontBuilder = stripTags(srcFont, ImmutableSet.of(Tag.cmap));
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'c', 'm', 'a', 'z'}),
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CmapEncoder.encode(srcFont));
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return fontBuilder;
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}
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public static Font.Builder preprocessKern(Font srcFont) {
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Font.Builder fontBuilder = stripTags(srcFont, ImmutableSet.of(Tag.kern));
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if (srcFont.hasTable(Tag.kern)) {
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addTableBytes(fontBuilder, Tag.intValue(new byte[] {'k', 'e', 'r', 'z'}),
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toBytes(KernEncoder.encode(srcFont)));
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}
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return fontBuilder;
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}
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public static void addTableBytes(Font.Builder fontBuilder, int tag, byte[] contents) {
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fontBuilder.newTableBuilder(tag, ReadableFontData.createReadableFontData(contents));
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}
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public static byte[] toBytes(FontFactory fontFactory, Font font) {
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try {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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fontFactory.serializeFont(font, baos);
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return baos.toByteArray();
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public static byte[] toBytes(ReadableFontData rfd) {
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byte[] result = new byte[rfd.length()];
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rfd.readBytes(0, result, 0, rfd.length());
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return result;
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}
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}
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