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优化循环查询字体unicode的效率

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This commit is contained in:
Antecer 2024-04-29 19:29:23 +08:00
parent ad1992d493
commit fd3d96fa74
1 changed files with 34 additions and 21 deletions
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55
app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.java
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@ -15,7 +15,7 @@ import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
@SuppressWarnings({"FieldCanBeLocal", "StatementWithEmptyBody", "unused"})
@SuppressWarnings({"FieldCanBeLocal", "unused"})
public class QueryTTF {
private static class Header {
public int majorVersion;
@ -389,8 +389,8 @@ public class QueryTTF {
ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
for (int i = 0; i < glyfCount; i++) {
final int index = i;
final var reader = new ByteArrayReader(buffer, dataTable.offset + loca.get(index));
executor.submit(() -> {
var reader = new ByteArrayReader(buffer, dataTable.offset + loca.get(index));
int glyfNextIndex = index + 1 < glyfCount ? (dataTable.offset + loca.get(index + 1)) : (dataTable.offset + dataTable.length);
byte[] glyph;
short numberOfContours = reader.ReadInt16();
@ -450,6 +450,28 @@ public class QueryTTF {
}
}
private void makeHashTable() {
ExecutorService executor = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
for (int i = 0; i < 130000; ++i) {
final int key = i;
executor.submit(() -> {
Integer gid = queryGlyfIndex(key);
if (gid < glyf.size()) {
unicodeToGlyphIndex.put(key, gid);
var val = glyf.get(gid);
unicodeToGlyph.put(key, val);
if (!glyphToUnicode.containsKey(val)) glyphToUnicode.put(val, key);
}
});
}
executor.shutdown();
try {
boolean b = executor.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
} catch (InterruptedException e) {
Log.e("queryTTF", "建立Unicode&Glyph映射表出错: " + e);
}
}
/**
* 构造函数
*
@ -457,7 +479,7 @@ public class QueryTTF {
*/
public QueryTTF(byte[] buffer) {
var fontReader = new ByteArrayReader(buffer, 0);
Log.i("[queryTTF]", "读文件头");
Log.i("queryTTF", "读文件头");
// 获取文件头
fileHeader.majorVersion = fontReader.ReadUInt16();
fileHeader.minorVersion = fontReader.ReadUInt16();
@ -475,30 +497,21 @@ public class QueryTTF {
directorys.put(d.tag, d);
}
Log.i("[queryTTF]", "解析表 name"); // 字体信息,包含版权、名称、作者等...
Log.i("queryTTF", "解析表 name"); // 字体信息,包含版权、名称、作者等...
readNameTable(buffer);
Log.i("[queryTTF]", "解析表 head"); // 获取 head.indexToLocFormat
Log.i("queryTTF", "解析表 head"); // 获取 head.indexToLocFormat
readHeadTable(buffer);
Log.i("[queryTTF]", "解析表 cmap"); // Unicode编码->轮廓索引 对照表
Log.i("queryTTF", "解析表 cmap"); // Unicode编码->轮廓索引 对照表
readCmapTable(buffer);
Log.i("[queryTTF]", "解析表 loca"); // 轮廓数据偏移地址表
Log.i("queryTTF", "解析表 loca"); // 轮廓数据偏移地址表
readLocaTable(buffer);
Log.i("[queryTTF]", "解析表 maxp"); // 获取 maxp.numGlyphs 字体轮廓数量
Log.i("queryTTF", "解析表 maxp"); // 获取 maxp.numGlyphs 字体轮廓数量
readMaxpTable(buffer);
Log.i("[queryTTF]", "解析表 glyf"); // 字体轮廓数据表,需要解析loca,maxp表后计算
Log.i("queryTTF", "解析表 glyf"); // 字体轮廓数据表,需要解析loca,maxp表后计算
readGlyfTable(buffer);
Log.i("[queryTTF]", "创建Unicode&Glyph映射表");
for (int key = 0; key < 130000; ++key) {
Integer gid = queryGlyfIndex(key);
if (gid >= glyf.size()) continue;
unicodeToGlyphIndex.put(key, gid);
var val = glyf.get(gid);
unicodeToGlyph.put(key, val);
if (glyphToUnicode.containsKey(val)) continue;
glyphToUnicode.put(val, key);
}
Log.i("[queryTTF]", "字体处理完成");
Log.i("queryTTF", "建立Unicode&Glyph映射表");
makeHashTable();
Log.i("queryTTF", "字体处理完成");
}
// /**