k
/
legado
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #489 from gedoor/antecer

Browse Source 
Antecer
pull/490/head
Antecer 4 years ago committed by GitHub
parent c2cd9f17de e7a63c68eb
commit 83c784f6f0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 121 additions and 121 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 242
      app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt

242
app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
Unescape View File

@ -9,6 +9,7 @@ import kotlin.experimental.and
* @see <a href="https://docs.microsoft.com/en-us/typography/opentype/spec/">获取详情</a>
* @see <a href="https://photopea.github.io/Typr.js/demo/index.html">基于Javascript的TTF解析器</a>
*/
@ExperimentalUnsignedTypes
class QueryTTF(var Font: ByteArray) : JsExtensions {
private class Header {
var majorVersion: UShort = 0u
@ -95,7 +96,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
var offset: UInt = 0u
}
private class CmapFormat0 {
private class CmapFormat0 {
var format: UShort = 0u
var length: UShort = 0u
var language: UShort = 0u
@ -152,12 +153,12 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
private class ByteArrayReader(var Buffer: ByteArray, var Index: Int) {
fun ReadUIntX(len: Long): ULong {
var result: ULong = 0u;
var result: ULong = 0u
for (i in 0 until len) {
result.shl(8);
result.shl(8)
result = result or Buffer[Index++].toULong()
}
return result;
return result
}
fun ReadUInt64(): ULong {
@ -203,7 +204,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
for (i in 0 until len) {
result[i] = Buffer[Index++]
}
return result;
return result
}
fun GetUInt16Array(len: Int): ArrayList<UShort> {
@ -212,7 +213,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
for (i in 0 until len) {
result[i] = ReadUInt16()
}
return result;
return result
}
fun GetInt16Array(len: Int): ArrayList<Short> {
@ -221,7 +222,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
for (i in 0 until len) {
result[i] = ReadInt16()
}
return result;
return result
}
}
@ -240,15 +241,15 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
FontReader = ByteArrayReader(Font, 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();
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.toInt()) {
val tag = FontReader.ReadStrings(4, Charsets.US_ASCII)
val t = Directory();
val t = Directory()
t.tag = tag
t.checkSum = FontReader.ReadUInt32()
t.offset = FontReader.ReadUInt32()
@ -258,10 +259,10 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
// 解析表 name (字体信息,包含版权、名称、作者等...)
for (Temp in directorys) {
if (Temp.tag == "name") {
FontReader.Index = Temp.offset.toInt();
name.format = FontReader.ReadUInt16();
name.count = FontReader.ReadUInt16();
name.stringOffset = FontReader.ReadUInt16();
FontReader.Index = Temp.offset.toInt()
name.format = FontReader.ReadUInt16()
name.count = FontReader.ReadUInt16()
name.stringOffset = FontReader.ReadUInt16()
for (i in 0 until name.count.toInt()) {
val record = NameRecord()
@ -271,54 +272,54 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
record.nameID = FontReader.ReadUInt16()
record.length = FontReader.ReadUInt16()
record.offset = FontReader.ReadUInt16()
name.records.add(record);
name.records.add(record)
}
}
}
// 解析表 head (获取 head.indexToLocFormat)
for (Temp in directorys) {
if (Temp.tag == "head") {
FontReader.Index = Temp.offset.toInt();
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();
FontReader.Index = Temp.offset.toInt()
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 (Temp in directorys) {
if (Temp.tag == "maxp") {
FontReader.Index = Temp.offset.toInt();
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();
FontReader.Index = Temp.offset.toInt()
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)
@ -348,13 +349,13 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
cmap.records.add(record)
}
for (i in 0 until cmap.numTables.toInt()) {
val fmtOffset = cmap.records[i].offset;
FontReader.Index = (Temp.offset + fmtOffset).toInt();
val EndIndex = FontReader.Index;
val fmtOffset = cmap.records[i].offset
FontReader.Index = (Temp.offset + fmtOffset).toInt()
val EndIndex = FontReader.Index
val format = FontReader.ReadUInt16();
val format = FontReader.ReadUInt16()
if (cmap.tables.contains(fmtOffset.toInt())) continue;
if (cmap.tables.contains(fmtOffset.toInt())) continue
when {
format.equals(0) -> {
val fmt = CmapFormat0()
@ -395,10 +396,10 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
format.equals(12) -> {
val fmt = CmapFormat12()
fmt.format = format
fmt.reserved = FontReader.ReadUInt16();
fmt.length = FontReader.ReadUInt32();
fmt.language = FontReader.ReadUInt32();
fmt.numGroups = FontReader.ReadUInt32();
fmt.reserved = FontReader.ReadUInt16()
fmt.length = FontReader.ReadUInt32()
fmt.language = FontReader.ReadUInt32()
fmt.numGroups = FontReader.ReadUInt32()
for (n in 0 until fmt.numGroups.toLong()) {
fmt.groups.add(Triple(FontReader.ReadUInt32(), FontReader.ReadUInt32(), FontReader.ReadUInt32()))
}
@ -430,7 +431,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
g.flags = ArrayList(flagLength)
var n = 0
while (n < flagLength) {
g.flags[n] = FontReader.GetByte();
g.flags[n] = FontReader.GetByte()
if ((g.flags[n].and(0x08)).toInt() != 0x00) {
for (m in FontReader.GetByte() downTo 1) {
g.flags[++n] = g.flags[n - 1]
@ -462,12 +463,12 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
// 相对坐标转绝对坐标 (因不绘制字体,这里用不上)
for(m in 1 until flagLength)
{
g.xCoordinates[m] = (g.xCoordinates[m] + g.xCoordinates[m - 1]).toShort();
g.yCoordinates[m] = (g.yCoordinates[m] + g.yCoordinates[m - 1]).toShort();
g.xCoordinates[m] = (g.xCoordinates[m] + g.xCoordinates[m - 1]).toShort()
g.yCoordinates[m] = (g.yCoordinates[m] + g.yCoordinates[m - 1]).toShort()
}
*/
glyf.add(g);
glyf.add(g)
} else {
// 复合字体暂未使用
}
@ -478,12 +479,12 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
// 建立Unicode&Glyf映射表
for (i in 0..130000) {
val gid = GetGlyfIndex(i).toInt()
if (gid == 0) continue;
if (gid == 0) continue
if (unicodeMap.containsKey(gid)) continue
val thisGlyf = ArrayList<Short>()
thisGlyf.addAll(glyf[gid].xCoordinates)
thisGlyf.addAll(glyf[gid].yCoordinates)
unicodeMap[i] = thisGlyf;
unicodeMap[i] = thisGlyf
}
}
@ -494,76 +495,78 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
*/
fun GetNameById(nameId: Int = 1): String {
for (Temp in directorys) {
if (Temp.tag != "name") continue;
FontReader.Index = Temp.offset.toInt();
break;
if (Temp.tag != "name") continue
FontReader.Index = Temp.offset.toInt()
break
}
for (record in name.records) {
if (record.nameID.toInt() != nameId) continue;
FontReader.Index = FontReader.Index + (name.stringOffset + record.offset).toInt();
return FontReader.ReadStrings(record.length.toInt(), if (record.platformID.toInt() == 1) Charsets.UTF_8 else Charsets.UTF_16BE);
if (record.nameID.toInt() != nameId) continue
FontReader.Index = FontReader.Index + (name.stringOffset + record.offset).toInt()
return FontReader.ReadStrings(record.length.toInt(), if (record.platformID.toInt() == 1) Charsets.UTF_8 else Charsets.UTF_16BE)
}
return "error";
return "error"
}
var pps = arrayListOf<Pair<UShort, UShort>>(Pair(3u, 10u), Pair(0u, 4u), Pair(3u, 1u), Pair(1u, 0u), Pair(0u, 3u), Pair(0u, 1u))
/**
* 使用Unicode值查找轮廓索引
*/
private fun GetGlyfIndex(code: Int): Long {
var fmtKey: UInt = 0u;
for (record in cmap.records) {
for (item in pps) {
if (code == 0) return 0
var fmtKey: UInt = 0u
for (item in pps) {
for (record in cmap.records) {
if ((item.first == record.platformID) && (item.second == record.encodingID)) {
fmtKey = record.offset;
break;
fmtKey = record.offset
break
}
}
if (fmtKey > 0u) break;
if (fmtKey > 0u) break
}
if (fmtKey == 0u) return 0;
if (fmtKey == 0u) return 0
var glyfID: Long = 0;
var glyfID: Long = 0
if (cmap.tables[fmtKey] is CmapFormat0) {
val tab = cmap.tables[fmtKey] as CmapFormat0
if (code >= tab.glyphIdArray.size) glyfID = 0;
else glyfID = tab.glyphIdArray[code].toLong();
if (code >= tab.glyphIdArray.size) glyfID = 0
else glyfID = tab.glyphIdArray[code].toLong()
} else if (cmap.tables[fmtKey] is CmapFormat4) {
val tab = cmap.tables[fmtKey] as CmapFormat4
if (code > tab.endCode.last().toInt()) return 0;
if (code > tab.endCode.last().toInt()) 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.toUInt()) start = middle;
else end = middle;
var end = tab.endCode.size - 1
while (start + 1 < end) {
middle = (start + end) / 2
if (tab.endCode[middle] <= code.toUInt()) start = middle
else end = middle
}
if (tab.endCode[start] < code.toUInt()) ++start;
if (code.toUInt() < tab.startCode[start]) return 0;
if (tab.endCode[start] < code.toUInt()) ++start
if (code.toUInt() < tab.startCode[start]) return 0
glyfID = if (tab.idRangeOffset[start].toInt() != 0) {
tab.glyphIdArray[code - tab.startCode[start].toInt() + (tab.idRangeOffset[start].toInt() / 2) - (tab.idRangeOffset.size - start)].toLong();
} else (code + tab.idDelta[start]).toLong();
tab.glyphIdArray[code - tab.startCode[start].toInt() + (tab.idRangeOffset[start].toInt() / 2) - (tab.idRangeOffset.size - start)].toLong()
} else (code + tab.idDelta[start]).toLong()
glyfID = glyfID.and(0xFFFF)
} else if (cmap.tables[fmtKey] is CmapFormat6) {
val tab = cmap.tables[fmtKey] as CmapFormat6
val index = code - tab.firstCode.toInt();
val index = code - tab.firstCode.toInt()
glyfID = if (index < 0 || index >= tab.glyphIdArray.size) 0 else tab.glyphIdArray[index].toLong()
} else if (cmap.tables[fmtKey] is CmapFormat12) {
val tab = (cmap.tables[fmtKey] as CmapFormat12);
if (code > tab.groups.last().second.toInt()) return 0;
val tab = (cmap.tables[fmtKey] as CmapFormat12)
if (code > tab.groups.last().second.toInt()) return 0
// 二分法查找数值索引
var start = 0
var middle: Int
var end = tab.groups.size - 1;
while (start + 1 != end) {
middle = (start + end) / 2;
if (tab.groups[middle].first.toInt() <= code) start = middle;
else end = middle;
var end = tab.groups.size - 1
while (start + 1 < end) {
middle = (start + end) / 2
if (tab.groups[middle].first.toInt() <= code) start = middle
else end = middle
}
if (tab.groups[start].first.toInt() <= code && code <= tab.groups[start].second.toInt()) {
glyfID = (tab.groups[start].third.toInt() + code - tab.groups[start].first.toInt()).toLong();
glyfID = (tab.groups[start].third.toInt() + code - tab.groups[start].first.toInt()).toLong()
}
}
return glyfID
@ -572,31 +575,28 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
/**
* 使用轮廓数据获取Unicode值
*/
public fun GetCodeByGlyf(inputGlyf:List<Short>): Int {
var unicodeVal = 0;
if(inputGlyf.isEmpty()) return 0;
for(g in unicodeMap)
{
if (inputGlyf.size != g.value.size) continue;
var isFound = true;
for(i in inputGlyf.indices)
{
public fun GetCodeByGlyf(inputGlyf: List<Short>): Int {
var unicodeVal = 0
if (inputGlyf.isEmpty()) return 0
for (g in unicodeMap) {
if (inputGlyf.size != g.value.size) continue
var isFound = true
for (i in inputGlyf.indices) {
if (inputGlyf[i] != g.value[i]) {
isFound = false;
break;
isFound = false
break
}
}
if (isFound) unicodeVal = g.key;
if (isFound) unicodeVal = g.key
}
return unicodeVal;
return unicodeVal
}
/**
* 使用Unicode值获取轮廓数据
*/
public fun GetGlyfByCode(code:Int): ArrayList<Short>
{
if(code <= 0) return ArrayList()
public fun GetGlyfByCode(code: Int): ArrayList<Short> {
if (code <= 0) return ArrayList()
return unicodeMap.getOrDefault(code, ArrayList())
}
}
Write Preview
Loading…
Cancel
Save