kunfei
4 years ago
committed by
GitHub
commit
f5c42ae158
@ -1,599 +0,0 @@ |
||||
package io.legado.app.model.analyzeRule; |
||||
|
||||
import org.apache.commons.lang3.tuple.Pair; |
||||
import org.apache.commons.lang3.tuple.Triple; |
||||
|
||||
import java.nio.charset.Charset; |
||||
import java.nio.charset.StandardCharsets; |
||||
import java.util.ArrayList; |
||||
import java.util.HashMap; |
||||
import java.util.LinkedList; |
||||
import java.util.List; |
||||
import java.util.Map; |
||||
|
||||
public class QueryTTF { |
||||
private class Header { |
||||
public int majorVersion; |
||||
public int minorVersion; |
||||
public int numOfTables; |
||||
public int searchRange; |
||||
public int entrySelector; |
||||
public int rangeShift; |
||||
} |
||||
|
||||
private class Directory { |
||||
public String tag; // table name
|
||||
public int checkSum; // Check sum
|
||||
public int offset; // Offset from beginning of file
|
||||
public int length; // length of the table in bytes
|
||||
} |
||||
|
||||
private class NameLayout { |
||||
public int format; |
||||
public int count; |
||||
public int stringOffset; |
||||
public List<NameRecord> records = new LinkedList<>(); |
||||
} |
||||
|
||||
private class NameRecord { |
||||
public int platformID; // 平台标识符<0:Unicode, 1:Mac, 2:ISO, 3:Windows, 4:Custom>
|
||||
public int encodingID; // 编码标识符
|
||||
public int languageID; // 语言标识符
|
||||
public int nameID; // 名称标识符
|
||||
public int length; // 名称字符串的长度
|
||||
public int offset; // 名称字符串相对于stringOffset的字节偏移量
|
||||
} |
||||
|
||||
private class HeadLayout { |
||||
public int majorVersion; |
||||
public int minorVersion; |
||||
public int fontRevision; |
||||
public int checkSumAdjustment; |
||||
public int magicNumber; |
||||
public int flags; |
||||
public int unitsPerEm; |
||||
public long created; |
||||
public long modified; |
||||
public short xMin; |
||||
public short yMin; |
||||
public short xMax; |
||||
public short yMax; |
||||
public int macStyle; |
||||
public int lowestRecPPEM; |
||||
public short fontDirectionHint; |
||||
public short indexToLocFormat; // <0:loca是2字节数组, 1:loca是4字节数组>
|
||||
public short glyphDataFormat; |
||||
} |
||||
|
||||
private class MaxpLayout { |
||||
public int majorVersion; |
||||
public int minorVersion; |
||||
public int numGlyphs; // 字体中的字形数量
|
||||
public int maxPoints; |
||||
public int maxContours; |
||||
public int maxCompositePoints; |
||||
public int maxCompositeContours; |
||||
public int maxZones; |
||||
public int maxTwilightPoints; |
||||
public int maxStorage; |
||||
public int maxFunctionDefs; |
||||
public int maxInstructionDefs; |
||||
public int maxStackElements; |
||||
public int maxSizeOfInstructions; |
||||
public int maxComponentElements; |
||||
public int maxComponentDepth; |
||||
} |
||||
|
||||
private class CmapLayout { |
||||
public int version; |
||||
public int numTables; |
||||
public List<CmapRecord> records = new LinkedList<>(); |
||||
public Map<Integer, CmapFormat> tables = new HashMap<>(); |
||||
} |
||||
|
||||
private class CmapRecord { |
||||
public int platformID; |
||||
public int encodingID; |
||||
public int offset; |
||||
} |
||||
|
||||
private class CmapFormat { |
||||
public int format; |
||||
public int length; |
||||
public int language; |
||||
public byte[] glyphIdArray; |
||||
} |
||||
|
||||
private class CmapFormat4 extends CmapFormat { |
||||
public int segCountX2; |
||||
public int searchRange; |
||||
public int entrySelector; |
||||
public int rangeShift; |
||||
public int[] endCode; |
||||
public int reservedPad; |
||||
public int[] startCode; |
||||
public short[] idDelta; |
||||
public int[] idRangeOffset; |
||||
public int[] glyphIdArray; |
||||
} |
||||
|
||||
private class CmapFormat6 extends CmapFormat { |
||||
public int firstCode; |
||||
public int entryCount; |
||||
public int[] glyphIdArray; |
||||
} |
||||
|
||||
private class CmapFormat12 extends CmapFormat { |
||||
public int reserved; |
||||
public int length; |
||||
public int language; |
||||
public int numGroups; |
||||
public List<Triple<Integer, Integer, Integer>> groups; |
||||
} |
||||
|
||||
private class GlyfLayout { |
||||
public short numberOfContours; // 非负值为简单字型,负值为符合字型
|
||||
public short xMin; |
||||
public short yMin; |
||||
public short xMax; |
||||
public short yMax; |
||||
public int[] endPtsOfContours; // length=numberOfContours
|
||||
public int instructionLength; |
||||
public byte[] instructions; // length=instructionLength
|
||||
public byte[] flags; |
||||
public short[] xCoordinates; // length = flags.length
|
||||
public short[] yCoordinates; // length = flags.length
|
||||
} |
||||
|
||||
private class ByteArrayReader { |
||||
public int Index; |
||||
public byte[] Buffer; |
||||
|
||||
public ByteArrayReader(byte[] buffer, int index) { |
||||
Buffer = buffer; |
||||
Index = index; |
||||
} |
||||
|
||||
public long ReadUIntX(long len) { |
||||
long result = 0; |
||||
for (long i = 0; i < len; ++i) { |
||||
result <<= 8; |
||||
result |= Buffer[Index++] & 0xFF; |
||||
} |
||||
return result; |
||||
} |
||||
|
||||
public long ReadUInt64() { |
||||
return ReadUIntX(8); |
||||
} |
||||
|
||||
public int ReadUInt32() { |
||||
return (int) ReadUIntX(4); |
||||
} |
||||
|
||||
public int ReadUInt16() { |
||||
return (int) ReadUIntX(2); |
||||
} |
||||
|
||||
public short ReadInt16() { |
||||
return (short) ReadUIntX(2); |
||||
} |
||||
|
||||
public short ReadUInt8() { |
||||
return (short) ReadUIntX(1); |
||||
} |
||||
|
||||
|
||||
public String ReadStrings(int len, Charset charset) { |
||||
byte[] result = len > 0 ? new byte[len] : null; |
||||
for (int i = 0; i < len; ++i) result[i] = Buffer[Index++]; |
||||
return new String(result, charset); |
||||
} |
||||
|
||||
public byte GetByte() { |
||||
return Buffer[Index++]; |
||||
} |
||||
|
||||
public byte[] GetBytes(int len) { |
||||
byte[] result = len > 0 ? new byte[len] : null; |
||||
for (int i = 0; i < len; ++i) result[i] = Buffer[Index++]; |
||||
return result; |
||||
} |
||||
|
||||
public int[] GetUInt16Array(int len) { |
||||
int[] result = len > 0 ? new int[len] : null; |
||||
for (int i = 0; i < len; ++i) result[i] = ReadUInt16(); |
||||
return result; |
||||
} |
||||
|
||||
public short[] GetInt16Array(int len) { |
||||
short[] result = len > 0 ? new short[len] : null; |
||||
for (int i = 0; i < len; ++i) result[i] = ReadInt16(); |
||||
return result; |
||||
} |
||||
} |
||||
|
||||
private final ByteArrayReader FontReader; |
||||
private final Header FileHeader = new Header(); |
||||
private final List<Directory> Directorys = new LinkedList<>(); |
||||
private final NameLayout Name = new NameLayout(); |
||||
private final HeadLayout Head = new HeadLayout(); |
||||
private final MaxpLayout Maxp = new MaxpLayout(); |
||||
private final List<Integer> Loca = new LinkedList<>(); |
||||
private final CmapLayout Cmap = new CmapLayout(); |
||||
private final List<GlyfLayout> Glyf = new LinkedList<>(); |
||||
private final Pair<Integer, Integer>[] pps = new Pair[]{ |
||||
Pair.of(3, 10), |
||||
Pair.of(0, 4), |
||||
Pair.of(3, 1), |
||||
Pair.of(1, 0), |
||||
Pair.of(0, 3), |
||||
Pair.of(0, 1) |
||||
}; |
||||
|
||||
public final Map<Integer, String> CodeToGlyph = new HashMap<>(); |
||||
public final Map<String, Integer> GlyphToCode = new HashMap<>(); |
||||
private int LimitMix = 0; |
||||
private int LimitMax = 0; |
||||
|
||||
/** |
||||
* 构造函数 |
||||
* |
||||
* @param buffer 传入TTF字体二进制数组 |
||||
*/ |
||||
public QueryTTF(byte[] buffer) { |
||||
FontReader = new ByteArrayReader(buffer, 0); |
||||
// 获取文件头
|
||||
FileHeader.majorVersion = FontReader.ReadUInt16(); |
||||
FileHeader.minorVersion = FontReader.ReadUInt16(); |
||||
FileHeader.numOfTables = FontReader.ReadUInt16(); |
||||
FileHeader.searchRange = FontReader.ReadUInt16(); |
||||
FileHeader.entrySelector = FontReader.ReadUInt16(); |
||||
FileHeader.rangeShift = FontReader.ReadUInt16(); |
||||
// 获取目录
|
||||
for (int i = 0; i < FileHeader.numOfTables; ++i) { |
||||
Directory d = new Directory(); |
||||
d.tag = FontReader.ReadStrings(4, StandardCharsets.US_ASCII); |
||||
d.checkSum = FontReader.ReadUInt32(); |
||||
d.offset = FontReader.ReadUInt32(); |
||||
d.length = FontReader.ReadUInt32(); |
||||
Directorys.add(d); |
||||
} |
||||
// 解析表 name (字体信息,包含版权、名称、作者等...)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("name")) { |
||||
FontReader.Index = Temp.offset; |
||||
Name.format = FontReader.ReadUInt16(); |
||||
Name.count = FontReader.ReadUInt16(); |
||||
Name.stringOffset = FontReader.ReadUInt16(); |
||||
for (int i = 0; i < Name.count; ++i) { |
||||
NameRecord record = new NameRecord(); |
||||
record.platformID = FontReader.ReadUInt16(); |
||||
record.encodingID = FontReader.ReadUInt16(); |
||||
record.languageID = FontReader.ReadUInt16(); |
||||
record.nameID = FontReader.ReadUInt16(); |
||||
record.length = FontReader.ReadUInt16(); |
||||
record.offset = FontReader.ReadUInt16(); |
||||
Name.records.add(record); |
||||
} |
||||
} |
||||
} |
||||
// 解析表 head (获取 head.indexToLocFormat)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("head")) { |
||||
FontReader.Index = Temp.offset; |
||||
Head.majorVersion = FontReader.ReadUInt16(); |
||||
Head.minorVersion = FontReader.ReadUInt16(); |
||||
Head.fontRevision = FontReader.ReadUInt32(); |
||||
Head.checkSumAdjustment = FontReader.ReadUInt32(); |
||||
Head.magicNumber = FontReader.ReadUInt32(); |
||||
Head.flags = FontReader.ReadUInt16(); |
||||
Head.unitsPerEm = FontReader.ReadUInt16(); |
||||
Head.created = FontReader.ReadUInt64(); |
||||
Head.modified = FontReader.ReadUInt64(); |
||||
Head.xMin = FontReader.ReadInt16(); |
||||
Head.yMin = FontReader.ReadInt16(); |
||||
Head.xMax = FontReader.ReadInt16(); |
||||
Head.yMax = FontReader.ReadInt16(); |
||||
Head.macStyle = FontReader.ReadUInt16(); |
||||
Head.lowestRecPPEM = FontReader.ReadUInt16(); |
||||
Head.fontDirectionHint = FontReader.ReadInt16(); |
||||
Head.indexToLocFormat = FontReader.ReadInt16(); |
||||
Head.glyphDataFormat = FontReader.ReadInt16(); |
||||
} |
||||
} |
||||
// 解析表 maxp (获取 maxp.numGlyphs)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("maxp")) { |
||||
FontReader.Index = Temp.offset; |
||||
Maxp.majorVersion = FontReader.ReadUInt16(); |
||||
Maxp.minorVersion = FontReader.ReadUInt16(); |
||||
Maxp.numGlyphs = FontReader.ReadUInt16(); |
||||
Maxp.maxPoints = FontReader.ReadUInt16(); |
||||
Maxp.maxContours = FontReader.ReadUInt16(); |
||||
Maxp.maxCompositePoints = FontReader.ReadUInt16(); |
||||
Maxp.maxCompositeContours = FontReader.ReadUInt16(); |
||||
Maxp.maxZones = FontReader.ReadUInt16(); |
||||
Maxp.maxTwilightPoints = FontReader.ReadUInt16(); |
||||
Maxp.maxStorage = FontReader.ReadUInt16(); |
||||
Maxp.maxFunctionDefs = FontReader.ReadUInt16(); |
||||
Maxp.maxInstructionDefs = FontReader.ReadUInt16(); |
||||
Maxp.maxStackElements = FontReader.ReadUInt16(); |
||||
Maxp.maxSizeOfInstructions = FontReader.ReadUInt16(); |
||||
Maxp.maxComponentElements = FontReader.ReadUInt16(); |
||||
Maxp.maxComponentDepth = FontReader.ReadUInt16(); |
||||
} |
||||
} |
||||
// 解析表 loca (轮廓数据偏移地址表)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("loca")) { |
||||
FontReader.Index = Temp.offset; |
||||
int offset = Head.indexToLocFormat == 0 ? 2 : 4; |
||||
for (long i = 0; i < Temp.length; i += offset) { |
||||
Loca.add(offset == 2 ? FontReader.ReadUInt16() << 1 : FontReader.ReadUInt32()); |
||||
} |
||||
} |
||||
} |
||||
// 解析表 cmap (Unicode编码轮廓索引对照表)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("cmap")) { |
||||
FontReader.Index = Temp.offset; |
||||
Cmap.version = FontReader.ReadUInt16(); |
||||
Cmap.numTables = FontReader.ReadUInt16(); |
||||
|
||||
for (int i = 0; i < Cmap.numTables; ++i) { |
||||
CmapRecord record = new CmapRecord(); |
||||
record.platformID = FontReader.ReadUInt16(); |
||||
record.encodingID = FontReader.ReadUInt16(); |
||||
record.offset = FontReader.ReadUInt32(); |
||||
Cmap.records.add(record); |
||||
} |
||||
for (int i = 0; i < Cmap.numTables; ++i) { |
||||
int fmtOffset = Cmap.records.get(i).offset; |
||||
FontReader.Index = Temp.offset + fmtOffset; |
||||
int EndIndex = FontReader.Index; |
||||
|
||||
int format = FontReader.ReadUInt16(); |
||||
if (Cmap.tables.containsKey(fmtOffset)) continue; |
||||
if (format == 0) { |
||||
CmapFormat f = new CmapFormat(); |
||||
f.format = format; |
||||
f.length = FontReader.ReadUInt16(); |
||||
f.language = FontReader.ReadUInt16(); |
||||
f.glyphIdArray = FontReader.GetBytes(f.length - 6); |
||||
Cmap.tables.put(fmtOffset, f); |
||||
} else if (format == 4) { |
||||
CmapFormat4 f = new CmapFormat4(); |
||||
f.format = format; |
||||
f.length = FontReader.ReadUInt16(); |
||||
f.language = FontReader.ReadUInt16(); |
||||
f.segCountX2 = FontReader.ReadUInt16(); |
||||
int segCount = f.segCountX2 >> 1; |
||||
f.searchRange = FontReader.ReadUInt16(); |
||||
f.entrySelector = FontReader.ReadUInt16(); |
||||
f.rangeShift = FontReader.ReadUInt16(); |
||||
f.endCode = FontReader.GetUInt16Array(segCount); |
||||
f.reservedPad = FontReader.ReadUInt16(); |
||||
f.startCode = FontReader.GetUInt16Array(segCount); |
||||
f.idDelta = FontReader.GetInt16Array(segCount); |
||||
f.idRangeOffset = FontReader.GetUInt16Array(segCount); |
||||
f.glyphIdArray = FontReader.GetUInt16Array((EndIndex + f.length - FontReader.Index) >> 1); |
||||
Cmap.tables.put(fmtOffset, f); |
||||
} else if (format == 6) { |
||||
CmapFormat6 f = new CmapFormat6(); |
||||
f.format = format; |
||||
f.length = FontReader.ReadUInt16(); |
||||
f.language = FontReader.ReadUInt16(); |
||||
f.firstCode = FontReader.ReadUInt16(); |
||||
f.entryCount = FontReader.ReadUInt16(); |
||||
f.glyphIdArray = FontReader.GetUInt16Array(f.entryCount); |
||||
Cmap.tables.put(fmtOffset, f); |
||||
} else if (format == 12) { |
||||
CmapFormat12 f = new CmapFormat12(); |
||||
f.format = format; |
||||
f.reserved = FontReader.ReadUInt16(); |
||||
f.length = FontReader.ReadUInt32(); |
||||
f.language = FontReader.ReadUInt32(); |
||||
f.numGroups = FontReader.ReadUInt32(); |
||||
f.groups = new ArrayList<>(f.numGroups); |
||||
for (int n = 0; n < f.numGroups; ++n) { |
||||
f.groups.add(Triple.of(FontReader.ReadUInt32(), FontReader.ReadUInt32(), FontReader.ReadUInt32())); |
||||
} |
||||
Cmap.tables.put(fmtOffset, f); |
||||
} |
||||
} |
||||
} |
||||
} |
||||
// 解析表 glyf (字体轮廓数据表)
|
||||
for (Directory Temp : Directorys) { |
||||
if (Temp.tag.equals("glyf")) { |
||||
FontReader.Index = Temp.offset; |
||||
for (int i = 0; i < Maxp.numGlyphs; ++i) { |
||||
FontReader.Index = Temp.offset + Loca.get(i); |
||||
|
||||
short numberOfContours = FontReader.ReadInt16(); |
||||
if (numberOfContours > 0) { |
||||
GlyfLayout g = new GlyfLayout(); |
||||
g.numberOfContours = numberOfContours; |
||||
g.xMin = FontReader.ReadInt16(); |
||||
g.yMin = FontReader.ReadInt16(); |
||||
g.xMax = FontReader.ReadInt16(); |
||||
g.yMax = FontReader.ReadInt16(); |
||||
g.endPtsOfContours = FontReader.GetUInt16Array(numberOfContours); |
||||
g.instructionLength = FontReader.ReadUInt16(); |
||||
g.instructions = FontReader.GetBytes(g.instructionLength); |
||||
int flagLength = g.endPtsOfContours[g.endPtsOfContours.length - 1] + 1; |
||||
// 获取轮廓点描述标志
|
||||
g.flags = new byte[flagLength]; |
||||
for (int n = 0; n < flagLength; ++n) { |
||||
g.flags[n] = FontReader.GetByte(); |
||||
if ((g.flags[n] & 0x08) != 0x00) { |
||||
for (int m = FontReader.ReadUInt8(); m > 0; --m) { |
||||
g.flags[++n] = g.flags[n - 1]; |
||||
} |
||||
} |
||||
} |
||||
// 获取轮廓点描述x轴相对值
|
||||
g.xCoordinates = new short[flagLength]; |
||||
for (int n = 0; n < flagLength; ++n) { |
||||
short same = (short) ((g.flags[n] & 0x10) != 0 ? 1 : -1); |
||||
if ((g.flags[n] & 0x02) != 0) { |
||||
g.xCoordinates[n] = (short) (same * FontReader.ReadUInt8()); |
||||
} else { |
||||
g.xCoordinates[n] = same == 1 ? (short) 0 : FontReader.ReadInt16(); |
||||
} |
||||
} |
||||
// 获取轮廓点描述y轴相对值
|
||||
g.yCoordinates = new short[flagLength]; |
||||
for (int n = 0; n < flagLength; ++n) { |
||||
short same = (short) ((g.flags[n] & 0x20) != 0 ? 1 : -1); |
||||
if ((g.flags[n] & 0x04) != 0) { |
||||
g.yCoordinates[n] = (short) (same * FontReader.ReadUInt8()); |
||||
} else { |
||||
g.yCoordinates[n] = same == 1 ? (short) 0 : FontReader.ReadInt16(); |
||||
} |
||||
} |
||||
// 相对坐标转绝对坐标
|
||||
// for (int n = 1; n < flagLength; ++n) {
|
||||
// xCoordinates[n] += xCoordinates[n - 1];
|
||||
// yCoordinates[n] += yCoordinates[n - 1];
|
||||
// }
|
||||
|
||||
Glyf.add(g); |
||||
} else { |
||||
// 复合字体暂未使用
|
||||
} |
||||
} |
||||
} |
||||
} |
||||
|
||||
// 建立Unicode&Glyph双向表
|
||||
for (int key = 0; key < 130000; ++key) { |
||||
if (key == 0xFF) key = 0x3400; |
||||
int gid = GetGlyfIndex(key); |
||||
if (gid == 0) continue; |
||||
StringBuilder sb = new StringBuilder(); |
||||
// 字型数据转String，方便存HashMap
|
||||
for (short b : Glyf.get(gid).xCoordinates) sb.append(b); |
||||
for (short b : Glyf.get(gid).yCoordinates) sb.append(b); |
||||
String val = sb.toString(); |
||||
if(LimitMix == 0) LimitMix = key; |
||||
LimitMax = key; |
||||
CodeToGlyph.put(key, val); |
||||
if (GlyphToCode.containsKey(val)) continue; |
||||
GlyphToCode.put(val, key); |
||||
} |
||||
} |
||||
|
||||
/** |
||||
* 获取字体信息 (1=字体名称) |
||||
* |
||||
* @param nameId 传入十进制字体信息索引 |
||||
* @return 返回查询结果字符串 |
||||
*/ |
||||
public String GetNameById(int nameId) { |
||||
for (Directory Temp : Directorys) { |
||||
if (!Temp.tag.equals("name")) continue; |
||||
FontReader.Index = Temp.offset; |
||||
break; |
||||
} |
||||
for (NameRecord record : Name.records) { |
||||
if (record.nameID != nameId) continue; |
||||
FontReader.Index += Name.stringOffset + record.offset; |
||||
return FontReader.ReadStrings(record.length, record.platformID == 1 ? StandardCharsets.UTF_8 : StandardCharsets.UTF_16BE); |
||||
} |
||||
return "error"; |
||||
} |
||||
|
||||
/** |
||||
* 使用Unicode值查找轮廓索引 |
||||
* |
||||
* @param code 传入Unicode十进制值 |
||||
* @return 返回十进制轮廓索引 |
||||
*/ |
||||
private int GetGlyfIndex(int code) { |
||||
if (code == 0) return 0; |
||||
int fmtKey = 0; |
||||
for (Pair<Integer, Integer> item : pps) { |
||||
for (CmapRecord record : Cmap.records) { |
||||
if ((item.getLeft() == record.platformID) && (item.getRight() == record.encodingID)) { |
||||
fmtKey = record.offset; |
||||
break; |
||||
} |
||||
} |
||||
if (fmtKey > 0) break; |
||||
} |
||||
if (fmtKey == 0) return 0; |
||||
|
||||
int glyfID = 0; |
||||
CmapFormat table = Cmap.tables.get(fmtKey); |
||||
int fmt = table.format; |
||||
if (fmt == 0) { |
||||
if (code < table.glyphIdArray.length) glyfID = table.glyphIdArray[code] & 0xFF; |
||||
} else if (fmt == 4) { |
||||
CmapFormat4 tab = (CmapFormat4) table; |
||||
if (code > tab.endCode[tab.endCode.length - 1]) return 0; |
||||
// 二分法查找数值索引
|
||||
int start = 0, middle, end = tab.endCode.length - 1; |
||||
while (start + 1 < end) { |
||||
middle = (start + end) / 2; |
||||
if (tab.endCode[middle] <= code) start = middle; |
||||
else end = middle; |
||||
} |
||||
if (tab.endCode[start] < code) ++start; |
||||
if (code < tab.startCode[start]) return 0; |
||||
if (tab.idRangeOffset[start] != 0) { |
||||
glyfID = tab.glyphIdArray[code - tab.startCode[start] + (tab.idRangeOffset[start] >> 1) - (tab.idRangeOffset.length - start)]; |
||||
} else glyfID = code + tab.idDelta[start]; |
||||
glyfID &= 0xFFFF; |
||||
} else if (fmt == 6) { |
||||
CmapFormat6 tab = (CmapFormat6) table; |
||||
int index = code - tab.firstCode; |
||||
if (index < 0 || index >= tab.glyphIdArray.length) glyfID = 0; |
||||
else glyfID = tab.glyphIdArray[index]; |
||||
} else if (fmt == 12) { |
||||
CmapFormat12 tab = (CmapFormat12) table; |
||||
if (code > tab.groups.get(tab.numGroups - 1).getMiddle()) return 0; |
||||
// 二分法查找数值索引
|
||||
int start = 0, middle, end = tab.numGroups - 1; |
||||
while (start + 1 < end) { |
||||
middle = (start + end) / 2; |
||||
if (tab.groups.get(middle).getLeft() <= code) start = middle; |
||||
else end = middle; |
||||
} |
||||
if (tab.groups.get(start).getLeft() <= code && code <= tab.groups.get(start).getMiddle()) { |
||||
glyfID = tab.groups.get(start).getRight() + code - tab.groups.get(start).getLeft(); |
||||
} |
||||
} |
||||
return glyfID; |
||||
} |
||||
|
||||
/** |
||||
* 判断Unicode值是否在字体范围内 |
||||
* @param code 传入Unicode十进制值 |
||||
* @return 返回bool查询结果 |
||||
*/ |
||||
public boolean InLimit(char code){ |
||||
return (LimitMix <= code) && (code < LimitMax); |
||||
} |
||||
|
||||
/** |
||||
* 使用Unicode值获取轮廓数据 |
||||
* |
||||
* @param key 传入Unicode十进制值 |
||||
* @return 返回轮廓数组的String值 |
||||
*/ |
||||
public String GetGlyfByCode(int key) { |
||||
return CodeToGlyph.getOrDefault(key, ""); |
||||
} |
||||
|
||||
/** |
||||
* 使用轮廓数据获取Unicode值 |
||||
* |
||||
* @param val 传入轮廓数组的String值 |
||||
* @return 返回Unicode十进制值 |
||||
*/ |
||||
public int GetCodeByGlyf(String val) { |
||||
return GlyphToCode.getOrDefault(val, 0); |
||||
} |
||||
} |
||||
@ -0,0 +1,633 @@ |
||||
package io.legado.app.model.analyzeRule |
||||
|
||||
import org.apache.commons.lang3.tuple.Pair |
||||
import org.apache.commons.lang3.tuple.Triple |
||||
import java.nio.charset.Charset |
||||
import java.nio.charset.StandardCharsets |
||||
import java.util.* |
||||
import kotlin.experimental.and |
||||
|
||||
class QueryTTF(buffer: ByteArray) { |
||||
private class Header( |
||||
var majorVersion: Int = 0, |
||||
var minorVersion: Int = 0, |
||||
var numOfTables: Int = 0, |
||||
var searchRange: Int = 0, |
||||
var entrySelector: Int = 0, |
||||
var rangeShift: Int = 0, |
||||
) |
||||
|
||||
private class Directory { |
||||
lateinit var tag: String // table name |
||||
var checkSum: Int = 0 // Check sum |
||||
var offset: Int = 0 // Offset from beginning of file |
||||
var length: Int = 0 // length of the table in bytes |
||||
} |
||||
|
||||
private class NameLayout( |
||||
var format: Int = 0, |
||||
var count: Int = 0, |
||||
var stringOffset: Int = 0, |
||||
var records: MutableList<NameRecord> = LinkedList(), |
||||
) |
||||
|
||||
private class NameRecord( |
||||
var platformID: Int = 0, // 平台标识符<0:Unicode, 1:Mac, 2:ISO, 3:Windows, 4:Custom> |
||||
var encodingID: Int = 0, // 编码标识符 |
||||
var languageID: Int = 0, // 语言标识符 |
||||
var nameID: Int = 0, // 名称标识符 |
||||
var length: Int = 0,// 名称字符串的长度 |
||||
var offset: Int = 0, // 名称字符串相对于stringOffset的字节偏移量 |
||||
) |
||||
|
||||
private class HeadLayout( |
||||
var majorVersion: Int = 0, |
||||
var minorVersion: Int = 0, |
||||
var fontRevision: Int = 0, |
||||
var checkSumAdjustment: Int = 0, |
||||
var magicNumber: Int = 0, |
||||
var flags: Int = 0, |
||||
var unitsPerEm: Int = 0, |
||||
var created: Long = 0, |
||||
var modified: Long = 0, |
||||
var xMin: Short = 0, |
||||
var yMin: Short = 0, |
||||
var xMax: Short = 0, |
||||
var yMax: Short = 0, |
||||
var macStyle: Int = 0, |
||||
var lowestRecPPEM: Int = 0, |
||||
var fontDirectionHint: Short = 0, |
||||
var indexToLocFormat: Short = 0, // <0:loca是2字节数组, 1:loca是4字节数组> |
||||
var glyphDataFormat: Short = 0, |
||||
) |
||||
|
||||
private class MaxpLayout( |
||||
var majorVersion: Int = 0, |
||||
var minorVersion: Int = 0, |
||||
var numGlyphs: Int = 0, // 字体中的字形数量 |
||||
var maxPoints: Int = 0, |
||||
var maxContours: Int = 0, |
||||
var maxCompositePoints: Int = 0, |
||||
var maxCompositeContours: Int = 0, |
||||
var maxZones: Int = 0, |
||||
var maxTwilightPoints: Int = 0, |
||||
var maxStorage: Int = 0, |
||||
var maxFunctionDefs: Int = 0, |
||||
var maxInstructionDefs: Int = 0, |
||||
var maxStackElements: Int = 0, |
||||
var maxSizeOfInstructions: Int = 0, |
||||
var maxComponentElements: Int = 0, |
||||
var maxComponentDepth: Int = 0, |
||||
) |
||||
|
||||
private class CmapLayout( |
||||
var version: Int = 0, |
||||
var numTables: Int = 0, |
||||
var records: MutableList<CmapRecord> = LinkedList(), |
||||
var tables: MutableMap<Int, CmapFormat> = HashMap(), |
||||
) |
||||
|
||||
private class CmapRecord( |
||||
var platformID: Int = 0, |
||||
var encodingID: Int = 0, |
||||
var offset: Int = 0, |
||||
) |
||||
|
||||
private open class CmapFormat { |
||||
var format: Int = 0 |
||||
open var length: Int = 0 |
||||
open var language: Int = 0 |
||||
lateinit var glyphIdArray: IntArray |
||||
} |
||||
|
||||
private class CmapFormat4 : CmapFormat() { |
||||
var segCountX2: Int = 0 |
||||
var searchRange: Int = 0 |
||||
var entrySelector: Int = 0 |
||||
var rangeShift: Int = 0 |
||||
lateinit var endCode: IntArray |
||||
var reservedPad: Int = 0 |
||||
lateinit var startCode: IntArray |
||||
lateinit var idDelta: ShortArray |
||||
lateinit var idRangeOffset: IntArray |
||||
// override lateinit var glyphIdArray: IntArray |
||||
} |
||||
|
||||
private class CmapFormat6( |
||||
var firstCode: Int = 0, |
||||
var entryCount: Int = 0, |
||||
) : CmapFormat() |
||||
|
||||
private class CmapFormat12( |
||||
var reserved: Int = 0, |
||||
override var length: Int = 0, |
||||
override var language: Int = 0, |
||||
var numGroups: Int = 0, |
||||
var groups: MutableList<Triple<Int, Int, Int>> |
||||
) : CmapFormat() |
||||
|
||||
private class GlyfLayout( |
||||
var numberOfContours: Short = 0, // 非负值为简单字型,负值为符合字型 |
||||
var xMin: Short = 0, |
||||
var yMin: Short = 0, |
||||
var xMax: Short = 0, |
||||
var yMax: Short = 0, |
||||
var instructionLength: Int = 0 |
||||
) { |
||||
lateinit var endPtsOfContours: IntArray // length=numberOfContours |
||||
lateinit var instructions: IntArray // length=instructionLength |
||||
lateinit var flags: ByteArray |
||||
lateinit var xCoordinates: ShortArray // length = flags.length |
||||
lateinit var yCoordinates: ShortArray // length = flags.length |
||||
} |
||||
|
||||
private class ByteArrayReader(var buffer: ByteArray, var index: Int) { |
||||
fun readUIntX(len: Long): Long { |
||||
var result: Long = 0 |
||||
for (i in 0 until len) { |
||||
result = result shl 8 |
||||
result = result or ((buffer[index++] and 0xFF.toByte()).toLong()) |
||||
} |
||||
return result |
||||
} |
||||
|
||||
fun readUInt64(): Long = readUIntX(8) |
||||
|
||||
fun readUInt32(): Int = readUIntX(4).toInt() |
||||
|
||||
fun readUInt16(): Int = readUIntX(2).toInt() |
||||
|
||||
fun readInt16(): Short = readUIntX(2).toShort() |
||||
|
||||
fun readUInt8(): Short = readUIntX(1).toShort() |
||||
|
||||
fun readStrings(len: Int, charset: Charset): String { |
||||
val result = ByteArray(len) |
||||
for (i in 0 until len) { |
||||
result[i] = buffer[index++] |
||||
} |
||||
return String(result, charset) |
||||
} |
||||
|
||||
fun getByte() = buffer[index++] |
||||
|
||||
fun getBytes(len: Int): IntArray { |
||||
val result = IntArray(len) |
||||
for (i in 0 until len) { |
||||
result[i] = buffer[index++].toInt() |
||||
} |
||||
return result |
||||
} |
||||
|
||||
fun getUInt16Array(len: Int): IntArray { |
||||
val result = IntArray(len) |
||||
for (i in 0 until len) { |
||||
result[i] = readUInt16() |
||||
} |
||||
return result |
||||
} |
||||
|
||||
fun getInt16Array(len: Int): ShortArray { |
||||
val result = ShortArray(len) |
||||
for (i in 0 until len) { |
||||
result[i] = readInt16() |
||||
} |
||||
return result |
||||
} |
||||
} |
||||
|
||||
private val fontReader: ByteArrayReader = ByteArrayReader(buffer, 0) |
||||
private val directories: MutableList<Directory> = LinkedList() |
||||
private val name = NameLayout() |
||||
private val cmap = CmapLayout() |
||||
private val pps: Array<Pair<Int, Int>> = arrayOf( |
||||
Pair.of(3, 10), |
||||
Pair.of(0, 4), |
||||
Pair.of(3, 1), |
||||
Pair.of(1, 0), |
||||
Pair.of(0, 3), |
||||
Pair.of(0, 1) |
||||
) |
||||
private val codeToGlyph: MutableMap<Int, String> = HashMap() |
||||
private val glyphToCode: MutableMap<String, Int> = HashMap() |
||||
private var limitMix = 0 |
||||
private var limitMax = 0 |
||||
|
||||
/** |
||||
* 获取字体信息 (1=字体名称) |
||||
* |
||||
* @param nameId 传入十进制字体信息索引 |
||||
* @return 返回查询结果字符串 |
||||
*/ |
||||
fun getNameById(nameId: Int): String { |
||||
for (temp in directories) { |
||||
if ("name" != temp.tag) { |
||||
continue |
||||
} |
||||
fontReader.index = temp.offset |
||||
break |
||||
} |
||||
for (record in name.records) { |
||||
if (record.nameID != nameId) { |
||||
continue |
||||
} |
||||
fontReader.index += name.stringOffset + record.offset |
||||
return fontReader.readStrings(record.length, if (record.platformID == 1) StandardCharsets.UTF_8 else StandardCharsets.UTF_16BE) |
||||
} |
||||
return "error" |
||||
} |
||||
|
||||
/** |
||||
* 使用Unicode值查找轮廓索引 |
||||
* |
||||
* @param code 传入Unicode十进制值 |
||||
* @return 返回十进制轮廓索引 |
||||
*/ |
||||
private fun getGlyfIndex(code: Int): Int { |
||||
if (code == 0) { |
||||
return 0 |
||||
} |
||||
var fmtKey = 0 |
||||
for (item in pps) { |
||||
for (record in cmap.records) { |
||||
if (item.left == record.platformID && item.right == record.encodingID) { |
||||
fmtKey = record.offset |
||||
break |
||||
} |
||||
} |
||||
if (fmtKey > 0) { |
||||
break |
||||
} |
||||
} |
||||
if (fmtKey == 0) { |
||||
return 0 |
||||
} |
||||
var glyfID = 0 |
||||
val table = cmap.tables[fmtKey] |
||||
when (table?.format) { |
||||
0 -> { |
||||
if (code < table.glyphIdArray.size) { |
||||
glyfID = table.glyphIdArray[code] and 0xFF |
||||
} |
||||
} |
||||
4 -> { |
||||
val tab = table as CmapFormat4 |
||||
if (code > tab.endCode[tab.endCode.size - 1]) { |
||||
return 0 |
||||
} |
||||
// 二分法查找数值索引 |
||||
var start = 0 |
||||
var middle: Int |
||||
var end = tab.endCode.size - 1 |
||||
while (start + 1 < end) { |
||||
middle = (start + end) / 2 |
||||
if (tab.endCode[middle] <= code) { |
||||
start = middle |
||||
} else { |
||||
end = middle |
||||
} |
||||
} |
||||
if (tab.endCode[start] < code) { |
||||
++start |
||||
} |
||||
if (code < tab.startCode[start]) { |
||||
return 0 |
||||
} |
||||
glyfID = if (tab.idRangeOffset[start] != 0) { |
||||
tab.glyphIdArray[code - tab.startCode[start] + (tab.idRangeOffset[start] shr 1) - (tab.idRangeOffset.size - start)] |
||||
} else { |
||||
code + tab.idDelta[start] |
||||
} |
||||
glyfID = glyfID and 0xFFFF |
||||
} |
||||
6 -> { |
||||
val tab = table as CmapFormat6 |
||||
val index = code - tab.firstCode |
||||
glyfID = if (index < 0 || index >= tab.glyphIdArray.size) { |
||||
0 |
||||
} else { |
||||
tab.glyphIdArray[index] |
||||
} |
||||
} |
||||
12 -> { |
||||
val tab = table as CmapFormat12 |
||||
if (code > tab.groups[tab.numGroups - 1].middle) { |
||||
return 0 |
||||
} |
||||
// 二分法查找数值索引 |
||||
var start = 0 |
||||
var middle: Int |
||||
var end = tab.numGroups - 1 |
||||
while (start + 1 < end) { |
||||
middle = (start + end) / 2 |
||||
if (tab.groups[middle].left <= code) { |
||||
start = middle |
||||
} else { |
||||
end = middle |
||||
} |
||||
} |
||||
if (tab.groups[start].left <= code && code <= tab.groups[start].middle) { |
||||
glyfID = tab.groups[start].right + code - tab.groups[start].left |
||||
} |
||||
} |
||||
} |
||||
return glyfID |
||||
} |
||||
|
||||
/** |
||||
* 判断Unicode值是否在字体范围内 |
||||
* @param code 传入Unicode十进制值 |
||||
* @return 返回bool查询结果 |
||||
*/ |
||||
fun inLimit(code: Char): Boolean = code.toInt() in limitMix until limitMax |
||||
|
||||
/** |
||||
* 使用Unicode值获取轮廓数据 |
||||
* |
||||
* @param key 传入Unicode十进制值 |
||||
* @return 返回轮廓数组的String值 |
||||
*/ |
||||
fun getGlyfByCode(key: Int): String = codeToGlyph.getOrDefault(key, "") |
||||
|
||||
/** |
||||
* 使用轮廓数据获取Unicode值 |
||||
* |
||||
* @param val 传入轮廓数组的String值 |
||||
* @return 返回Unicode十进制值 |
||||
*/ |
||||
fun getCodeByGlyf(`val`: String): Int = glyphToCode.getOrDefault(`val`, 0) |
||||
|
||||
/** |
||||
* 构造函数 buffer 传入TTF字体二进制数组 |
||||
*/ |
||||
init { |
||||
// 获取文件头 |
||||
val fileHeader = Header() |
||||
fileHeader.majorVersion = fontReader.readUInt16() |
||||
fileHeader.minorVersion = fontReader.readUInt16() |
||||
fileHeader.numOfTables = fontReader.readUInt16() |
||||
fileHeader.searchRange = fontReader.readUInt16() |
||||
fileHeader.entrySelector = fontReader.readUInt16() |
||||
fileHeader.rangeShift = fontReader.readUInt16() |
||||
// 获取目录 |
||||
for (i in 0 until fileHeader.numOfTables) { |
||||
val d = Directory() |
||||
d.tag = fontReader.readStrings(4, StandardCharsets.US_ASCII) |
||||
d.checkSum = fontReader.readUInt32() |
||||
d.offset = fontReader.readUInt32() |
||||
d.length = fontReader.readUInt32() |
||||
directories.add(d) |
||||
} |
||||
// 解析表 name (字体信息,包含版权、名称、作者等...) |
||||
for (temp in directories) { |
||||
if ("name" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
name.format = fontReader.readUInt16() |
||||
name.count = fontReader.readUInt16() |
||||
name.stringOffset = fontReader.readUInt16() |
||||
for (i in 0 until name.count) { |
||||
val record = NameRecord() |
||||
record.platformID = fontReader.readUInt16() |
||||
record.encodingID = fontReader.readUInt16() |
||||
record.languageID = fontReader.readUInt16() |
||||
record.nameID = fontReader.readUInt16() |
||||
record.length = fontReader.readUInt16() |
||||
record.offset = fontReader.readUInt16() |
||||
name.records.add(record) |
||||
} |
||||
} |
||||
} |
||||
// 解析表 head (获取 head.indexToLocFormat) |
||||
val head = HeadLayout() |
||||
for (temp in directories) { |
||||
if ("head" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
head.majorVersion = fontReader.readUInt16() |
||||
head.minorVersion = fontReader.readUInt16() |
||||
head.fontRevision = fontReader.readUInt32() |
||||
head.checkSumAdjustment = fontReader.readUInt32() |
||||
head.magicNumber = fontReader.readUInt32() |
||||
head.flags = fontReader.readUInt16() |
||||
head.unitsPerEm = fontReader.readUInt16() |
||||
head.created = fontReader.readUInt64() |
||||
head.modified = fontReader.readUInt64() |
||||
head.xMin = fontReader.readInt16() |
||||
head.yMin = fontReader.readInt16() |
||||
head.xMax = fontReader.readInt16() |
||||
head.yMax = fontReader.readInt16() |
||||
head.macStyle = fontReader.readUInt16() |
||||
head.lowestRecPPEM = fontReader.readUInt16() |
||||
head.fontDirectionHint = fontReader.readInt16() |
||||
head.indexToLocFormat = fontReader.readInt16() |
||||
head.glyphDataFormat = fontReader.readInt16() |
||||
} |
||||
} |
||||
// 解析表 maxp (获取 maxp.numGlyphs) |
||||
val maxp = MaxpLayout() |
||||
for (temp in directories) { |
||||
if ("maxp" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
maxp.majorVersion = fontReader.readUInt16() |
||||
maxp.minorVersion = fontReader.readUInt16() |
||||
maxp.numGlyphs = fontReader.readUInt16() |
||||
maxp.maxPoints = fontReader.readUInt16() |
||||
maxp.maxContours = fontReader.readUInt16() |
||||
maxp.maxCompositePoints = fontReader.readUInt16() |
||||
maxp.maxCompositeContours = fontReader.readUInt16() |
||||
maxp.maxZones = fontReader.readUInt16() |
||||
maxp.maxTwilightPoints = fontReader.readUInt16() |
||||
maxp.maxStorage = fontReader.readUInt16() |
||||
maxp.maxFunctionDefs = fontReader.readUInt16() |
||||
maxp.maxInstructionDefs = fontReader.readUInt16() |
||||
maxp.maxStackElements = fontReader.readUInt16() |
||||
maxp.maxSizeOfInstructions = fontReader.readUInt16() |
||||
maxp.maxComponentElements = fontReader.readUInt16() |
||||
maxp.maxComponentDepth = fontReader.readUInt16() |
||||
} |
||||
} |
||||
// 解析表 loca (轮廓数据偏移地址表) |
||||
val loca: MutableList<Int> = LinkedList() |
||||
for (temp in directories) { |
||||
if ("loca" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
val offset = if (head.indexToLocFormat == 0.toShort()) 2 else 4 |
||||
var i: Long = 0 |
||||
while (i < temp.length) { |
||||
loca.add(if (offset == 2) fontReader.readUInt16() shl 1 else fontReader.readUInt32()) |
||||
i += offset |
||||
} |
||||
} |
||||
} |
||||
// 解析表 cmap (Unicode编码轮廓索引对照表) |
||||
for (temp in directories) { |
||||
if ("cmap" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
cmap.version = fontReader.readUInt16() |
||||
cmap.numTables = fontReader.readUInt16() |
||||
for (i in 0 until cmap.numTables) { |
||||
val record = CmapRecord() |
||||
record.platformID = fontReader.readUInt16() |
||||
record.encodingID = fontReader.readUInt16() |
||||
record.offset = fontReader.readUInt32() |
||||
cmap.records.add(record) |
||||
} |
||||
for (i in 0 until cmap.numTables) { |
||||
val fmtOffset = cmap.records[i].offset |
||||
fontReader.index = temp.offset + fmtOffset |
||||
val endIndex = fontReader.index |
||||
val format = fontReader.readUInt16() |
||||
if (cmap.tables.containsKey(fmtOffset)) { |
||||
continue |
||||
} |
||||
when (format) { |
||||
0 -> { |
||||
val f = CmapFormat() |
||||
f.format = format |
||||
f.length = fontReader.readUInt16() |
||||
f.language = fontReader.readUInt16() |
||||
f.glyphIdArray = fontReader.getBytes(f.length - 6) |
||||
cmap.tables[fmtOffset] = f |
||||
} |
||||
4 -> { |
||||
val f = CmapFormat4() |
||||
f.format = format |
||||
f.length = fontReader.readUInt16() |
||||
f.language = fontReader.readUInt16() |
||||
f.segCountX2 = fontReader.readUInt16() |
||||
val segCount = f.segCountX2 shr 1 |
||||
f.searchRange = fontReader.readUInt16() |
||||
f.entrySelector = fontReader.readUInt16() |
||||
f.rangeShift = fontReader.readUInt16() |
||||
f.endCode = fontReader.getUInt16Array(segCount) |
||||
f.reservedPad = fontReader.readUInt16() |
||||
f.startCode = fontReader.getUInt16Array(segCount) |
||||
f.idDelta = fontReader.getInt16Array(segCount) |
||||
f.idRangeOffset = fontReader.getUInt16Array(segCount) |
||||
f.glyphIdArray = fontReader.getUInt16Array(endIndex + f.length - fontReader.index shr 1) |
||||
cmap.tables[fmtOffset] = f |
||||
} |
||||
6 -> { |
||||
val f = CmapFormat6() |
||||
f.format = format |
||||
f.length = fontReader.readUInt16() |
||||
f.language = fontReader.readUInt16() |
||||
f.firstCode = fontReader.readUInt16() |
||||
f.entryCount = fontReader.readUInt16() |
||||
f.glyphIdArray = fontReader.getUInt16Array(f.entryCount) |
||||
cmap.tables[fmtOffset] = f |
||||
} |
||||
12 -> { |
||||
val f = CmapFormat12( |
||||
reserved = fontReader.readUInt16(), |
||||
length = fontReader.readUInt32(), |
||||
language = fontReader.readUInt32(), |
||||
numGroups = fontReader.readUInt32(), |
||||
groups = ArrayList(fontReader.readUInt32()) |
||||
) |
||||
f.format = format |
||||
for (n in 0 until f.numGroups) { |
||||
(f.groups as ArrayList<Triple<Int, Int, Int>>).add(Triple.of(fontReader.readUInt32(), fontReader.readUInt32(), fontReader.readUInt32())) |
||||
} |
||||
cmap.tables[fmtOffset] = f |
||||
} |
||||
} |
||||
} |
||||
} |
||||
} |
||||
// 解析表 glyf (字体轮廓数据表) |
||||
val glyf: MutableList<GlyfLayout> = LinkedList() |
||||
for (temp in directories) { |
||||
if ("glyf" == temp.tag) { |
||||
fontReader.index = temp.offset |
||||
for (i in 0 until maxp.numGlyphs) { |
||||
fontReader.index = temp.offset + loca[i] |
||||
val numberOfContours = fontReader.readInt16() |
||||
if (numberOfContours > 0) { |
||||
val g = GlyfLayout() |
||||
g.numberOfContours = numberOfContours |
||||
g.xMin = fontReader.readInt16() |
||||
g.yMin = fontReader.readInt16() |
||||
g.xMax = fontReader.readInt16() |
||||
g.yMax = fontReader.readInt16() |
||||
g.endPtsOfContours = fontReader.getUInt16Array(numberOfContours.toInt()) |
||||
g.instructionLength = fontReader.readUInt16() |
||||
g.instructions = fontReader.getBytes(g.instructionLength) |
||||
val flagLength = g.endPtsOfContours[g.endPtsOfContours.size - 1] + 1 |
||||
// 获取轮廓点描述标志 |
||||
g.flags = ByteArray(flagLength).apply { |
||||
var n = 0 |
||||
while (n < flagLength) { |
||||
this[n] = fontReader.getByte() |
||||
if ((this[n] and 0x08) != 0x00.toByte()) { |
||||
for (m in fontReader.readUInt8() downTo 1) { |
||||
this[++n] = this[n - 1] |
||||
} |
||||
} |
||||
++n |
||||
} |
||||
} |
||||
// 获取轮廓点描述x轴相对值 |
||||
g.xCoordinates = ShortArray(flagLength) |
||||
for (n in 0 until flagLength) { |
||||
val same = (if (g.flags[n] and 0x10 != 0.toByte()) 1 else -1).toShort() |
||||
if (g.flags[n] and 0x02 != 0.toByte()) { |
||||
g.xCoordinates[n] = (same * fontReader.readUInt8()).toShort() |
||||
} else { |
||||
g.xCoordinates[n] = if (same.toInt() == 1) 0.toShort() else fontReader.readInt16() |
||||
} |
||||
} |
||||
// 获取轮廓点描述y轴相对值 |
||||
g.yCoordinates = ShortArray(flagLength) |
||||
for (n in 0 until flagLength) { |
||||
val same = (if (g.flags[n] and 0x20 != 0.toByte()) 1 else -1).toShort() |
||||
if (g.flags[n] and 0x04 != 0.toByte()) { |
||||
g.yCoordinates[n] = (same * fontReader.readUInt8()).toShort() |
||||
} else { |
||||
g.yCoordinates[n] = if (same.toInt() == 1) 0.toShort() else fontReader.readInt16() |
||||
} |
||||
} |
||||
// 相对坐标转绝对坐标 |
||||
// for (int n = 1; n < flagLength; ++n) { |
||||
// xCoordinates[n] += xCoordinates[n - 1]; |
||||
// yCoordinates[n] += yCoordinates[n - 1]; |
||||
// } |
||||
glyf.add(g) |
||||
} //else情况：复合字体暂未使用 |
||||
} |
||||
} |
||||
} |
||||
|
||||
// 建立Unicode&Glyph双向表 |
||||
var key = 0 |
||||
while (key < 130000) { |
||||
if (key == 0xFF) { |
||||
key = 0x3400 |
||||
} |
||||
val gid = getGlyfIndex(key) |
||||
if (gid == 0) { |
||||
++key |
||||
continue |
||||
} |
||||
val sb = StringBuilder() |
||||
// 字型数据转String，方便存HashMap |
||||
for (b in glyf[gid].xCoordinates) { |
||||
sb.append(b.toInt()) |
||||
} |
||||
for (b in glyf[gid].yCoordinates) { |
||||
sb.append(b.toInt()) |
||||
} |
||||
val `val` = sb.toString() |
||||
if (limitMix == 0) { |
||||
limitMix = key |
||||
} |
||||
limitMax = key |
||||
codeToGlyph[key] = `val` |
||||
if (glyphToCode.containsKey(`val`)) { |
||||
++key |
||||
continue |
||||
} |
||||
glyphToCode[`val`] = key |
||||
++key |
||||
} |
||||
} |
||||
} |
||||
Loading…
Reference in new issue