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pull/490/head
gedoor 4 years ago
parent c2cd9f17de
commit 121a45d2c2
1 changed files with 224 additions and 207 deletions
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  1. 429
      app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt

429
app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
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@ -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://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> * @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 { class QueryTTF(var Font: ByteArray) : JsExtensions {
private class Header { private class Header {
var majorVersion: UShort = 0u var majorVersion: UShort = 0u
@ -150,41 +151,42 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
lateinit var yCoordinates: ArrayList<Short> lateinit var yCoordinates: ArrayList<Short>
} }
@Suppress("unused")
private class ByteArrayReader(var Buffer: ByteArray, var Index: Int) { private class ByteArrayReader(var Buffer: ByteArray, var Index: Int) {
fun ReadUIntX(len: Long): ULong { fun readUIntX(len: Long): ULong {
var result: ULong = 0u; var result: ULong = 0u
for (i in 0 until len) { for (i in 0 until len) {
result.shl(8); result.shl(8)
result = result or Buffer[Index++].toULong() result = result or Buffer[Index++].toULong()
} }
return result; return result
} }
fun ReadUInt64(): ULong { fun readUInt64(): ULong {
return ReadUIntX(8) return readUIntX(8)
} }
fun ReadInt64(): Long { fun readInt64(): Long {
return ReadUIntX(8).toLong() return readUIntX(8).toLong()
} }
fun ReadUInt32(): UInt { fun readUInt32(): UInt {
return ReadUIntX(4).toUInt() return readUIntX(4).toUInt()
} }
fun ReadInt32(): Int { fun readInt32(): Int {
return ReadUIntX(4).toInt() return readUIntX(4).toInt()
} }
fun ReadUInt16(): UShort { fun readUInt16(): UShort {
return ReadUIntX(2).toUShort() return readUIntX(2).toUShort()
} }
fun ReadInt16(): Short { fun readInt16(): Short {
return ReadUIntX(2).toShort() return readUIntX(2).toShort()
} }
fun ReadStrings(len: Int, charset: Charset): String { fun readStrings(len: Int, charset: Charset): String {
if (len <= 0) return "" if (len <= 0) return ""
val result = ByteArray(len) val result = ByteArray(len)
for (i in 0 until len) { for (i in 0 until len) {
@ -193,39 +195,39 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
return result.toString(charset) return result.toString(charset)
} }
fun GetByte(): Byte { fun getByte(): Byte {
return Buffer[Index++] return Buffer[Index++]
} }
fun GetBytes(len: Int): ArrayList<Byte> { fun getBytes(len: Int): ArrayList<Byte> {
if (len <= 0) return ArrayList(0) if (len <= 0) return ArrayList(0)
val result = ArrayList<Byte>(len) val result = ArrayList<Byte>(len)
for (i in 0 until len) { for (i in 0 until len) {
result[i] = Buffer[Index++] result[i] = Buffer[Index++]
} }
return result; return result
} }
fun GetUInt16Array(len: Int): ArrayList<UShort> { fun getUInt16Array(len: Int): ArrayList<UShort> {
if (len <= 0) return ArrayList(0) if (len <= 0) return ArrayList(0)
val result = ArrayList<UShort>(len) val result = ArrayList<UShort>(len)
for (i in 0 until len) { for (i in 0 until len) {
result[i] = ReadUInt16() result[i] = readUInt16()
} }
return result; return result
} }
fun GetInt16Array(len: Int): ArrayList<Short> { fun getInt16Array(len: Int): ArrayList<Short> {
if (len <= 0) return ArrayList(0) if (len <= 0) return ArrayList(0)
val result = ArrayList<Short>(len) val result = ArrayList<Short>(len)
for (i in 0 until len) { for (i in 0 until len) {
result[i] = ReadInt16() result[i] = readInt16()
} }
return result; return result
} }
} }
private var FontReader: ByteArrayReader private var fontReader: ByteArrayReader
private var fileHeader = Header() private var fileHeader = Header()
private var directorys = ArrayList<Directory>() private var directorys = ArrayList<Directory>()
private var name = NameLayout() private var name = NameLayout()
@ -237,170 +239,180 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
private var unicodeMap = mutableMapOf<Int, ArrayList<Short>>() private var unicodeMap = mutableMapOf<Int, ArrayList<Short>>()
init { init {
FontReader = ByteArrayReader(Font, 0) fontReader = ByteArrayReader(Font, 0)
// 获取文件头 // 获取文件头
fileHeader.majorVersion = FontReader.ReadUInt16() fileHeader.majorVersion = fontReader.readUInt16()
fileHeader.minorVersion = FontReader.ReadUInt16(); fileHeader.minorVersion = fontReader.readUInt16()
fileHeader.numOfTables = FontReader.ReadUInt16(); fileHeader.numOfTables = fontReader.readUInt16()
fileHeader.searchRange = FontReader.ReadUInt16(); fileHeader.searchRange = fontReader.readUInt16()
fileHeader.entrySelector = FontReader.ReadUInt16(); fileHeader.entrySelector = fontReader.readUInt16()
fileHeader.rangeShift = FontReader.ReadUInt16(); fileHeader.rangeShift = fontReader.readUInt16()
// 获取目录 // 获取目录
for (i in 0 until fileHeader.numOfTables.toInt()) { for (i in 0 until fileHeader.numOfTables.toInt()) {
val tag = FontReader.ReadStrings(4, Charsets.US_ASCII) val tag = fontReader.readStrings(4, Charsets.US_ASCII)
val t = Directory(); val t = Directory()
t.tag = tag t.tag = tag
t.checkSum = FontReader.ReadUInt32() t.checkSum = fontReader.readUInt32()
t.offset = FontReader.ReadUInt32() t.offset = fontReader.readUInt32()
t.length = FontReader.ReadUInt32() t.length = fontReader.readUInt32()
directorys.add(t) directorys.add(t)
} }
// 解析表 name (字体信息,包含版权、名称、作者等...) // 解析表 name (字体信息,包含版权、名称、作者等...)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "name") { if (temp.tag == "name") {
FontReader.Index = Temp.offset.toInt(); fontReader.Index = temp.offset.toInt()
name.format = FontReader.ReadUInt16(); name.format = fontReader.readUInt16()
name.count = FontReader.ReadUInt16(); name.count = fontReader.readUInt16()
name.stringOffset = FontReader.ReadUInt16(); name.stringOffset = fontReader.readUInt16()
for (i in 0 until name.count.toInt()) { for (i in 0 until name.count.toInt()) {
val record = NameRecord() val record = NameRecord()
record.platformID = FontReader.ReadUInt16() record.platformID = fontReader.readUInt16()
record.encodingID = FontReader.ReadUInt16() record.encodingID = fontReader.readUInt16()
record.languageID = FontReader.ReadUInt16() record.languageID = fontReader.readUInt16()
record.nameID = FontReader.ReadUInt16() record.nameID = fontReader.readUInt16()
record.length = FontReader.ReadUInt16() record.length = fontReader.readUInt16()
record.offset = FontReader.ReadUInt16() record.offset = fontReader.readUInt16()
name.records.add(record); name.records.add(record)
} }
} }
} }
// 解析表 head (获取 head.indexToLocFormat) // 解析表 head (获取 head.indexToLocFormat)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "head") { if (temp.tag == "head") {
FontReader.Index = Temp.offset.toInt(); fontReader.Index = temp.offset.toInt()
head.majorVersion = FontReader.ReadUInt16(); head.majorVersion = fontReader.readUInt16()
head.minorVersion = FontReader.ReadUInt16(); head.minorVersion = fontReader.readUInt16()
head.fontRevision = FontReader.ReadUInt32(); head.fontRevision = fontReader.readUInt32()
head.checkSumAdjustment = FontReader.ReadUInt32(); head.checkSumAdjustment = fontReader.readUInt32()
head.magicNumber = FontReader.ReadUInt32(); head.magicNumber = fontReader.readUInt32()
head.flags = FontReader.ReadUInt16(); head.flags = fontReader.readUInt16()
head.unitsPerEm = FontReader.ReadUInt16(); head.unitsPerEm = fontReader.readUInt16()
head.created = FontReader.ReadUInt64(); head.created = fontReader.readUInt64()
head.modified = FontReader.ReadUInt64(); head.modified = fontReader.readUInt64()
head.xMin = FontReader.ReadInt16(); head.xMin = fontReader.readInt16()
head.yMin = FontReader.ReadInt16(); head.yMin = fontReader.readInt16()
head.xMax = FontReader.ReadInt16(); head.xMax = fontReader.readInt16()
head.yMax = FontReader.ReadInt16(); head.yMax = fontReader.readInt16()
head.macStyle = FontReader.ReadUInt16(); head.macStyle = fontReader.readUInt16()
head.lowestRecPPEM = FontReader.ReadUInt16(); head.lowestRecPPEM = fontReader.readUInt16()
head.fontDirectionHint = FontReader.ReadInt16(); head.fontDirectionHint = fontReader.readInt16()
head.indexToLocFormat = FontReader.ReadInt16(); head.indexToLocFormat = fontReader.readInt16()
head.glyphDataFormat = FontReader.ReadInt16(); head.glyphDataFormat = fontReader.readInt16()
} }
} }
// 解析表 maxp (获取 maxp.numGlyphs) // 解析表 maxp (获取 maxp.numGlyphs)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "maxp") { if (temp.tag == "maxp") {
FontReader.Index = Temp.offset.toInt(); fontReader.Index = temp.offset.toInt()
maxp.majorVersion = FontReader.ReadUInt16(); maxp.majorVersion = fontReader.readUInt16()
maxp.minorVersion = FontReader.ReadUInt16(); maxp.minorVersion = fontReader.readUInt16()
maxp.numGlyphs = FontReader.ReadUInt16(); maxp.numGlyphs = fontReader.readUInt16()
maxp.maxPoints = FontReader.ReadUInt16(); maxp.maxPoints = fontReader.readUInt16()
maxp.maxContours = FontReader.ReadUInt16(); maxp.maxContours = fontReader.readUInt16()
maxp.maxCompositePoints = FontReader.ReadUInt16(); maxp.maxCompositePoints = fontReader.readUInt16()
maxp.maxCompositeContours = FontReader.ReadUInt16(); maxp.maxCompositeContours = fontReader.readUInt16()
maxp.maxZones = FontReader.ReadUInt16(); maxp.maxZones = fontReader.readUInt16()
maxp.maxTwilightPoints = FontReader.ReadUInt16(); maxp.maxTwilightPoints = fontReader.readUInt16()
maxp.maxStorage = FontReader.ReadUInt16(); maxp.maxStorage = fontReader.readUInt16()
maxp.maxFunctionDefs = FontReader.ReadUInt16(); maxp.maxFunctionDefs = fontReader.readUInt16()
maxp.maxInstructionDefs = FontReader.ReadUInt16(); maxp.maxInstructionDefs = fontReader.readUInt16()
maxp.maxStackElements = FontReader.ReadUInt16(); maxp.maxStackElements = fontReader.readUInt16()
maxp.maxSizeOfInstructions = FontReader.ReadUInt16(); maxp.maxSizeOfInstructions = fontReader.readUInt16()
maxp.maxComponentElements = FontReader.ReadUInt16(); maxp.maxComponentElements = fontReader.readUInt16()
maxp.maxComponentDepth = FontReader.ReadUInt16(); maxp.maxComponentDepth = fontReader.readUInt16()
} }
} }
// 解析表 loca (轮廓数据偏移地址表) // 解析表 loca (轮廓数据偏移地址表)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "loca") { if (temp.tag == "loca") {
FontReader.Index = Temp.offset.toInt() fontReader.Index = temp.offset.toInt()
val offset: UInt = if (head.indexToLocFormat.toInt() == 0) 2u else 4u val offset: UInt = if (head.indexToLocFormat.toInt() == 0) 2u else 4u
var i: UInt = 0u var i: UInt = 0u
while (i < Temp.length) { while (i < temp.length) {
loca.add(if (offset == 2u) FontReader.ReadUInt16().toUInt().shl(1) else FontReader.ReadUInt32()) loca.add(
if (offset == 2u) fontReader.readUInt16().toUInt()
.shl(1) else fontReader.readUInt32()
)
i += offset i += offset
} }
} }
} }
// 解析表 cmap (Unicode编码轮廓索引对照表) // 解析表 cmap (Unicode编码轮廓索引对照表)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "cmap") { if (temp.tag == "cmap") {
FontReader.Index = Temp.offset.toInt() fontReader.Index = temp.offset.toInt()
cmap.version = FontReader.ReadUInt16() cmap.version = fontReader.readUInt16()
cmap.numTables = FontReader.ReadUInt16() cmap.numTables = fontReader.readUInt16()
for (i in 0 until cmap.numTables.toInt()) { for (i in 0 until cmap.numTables.toInt()) {
val record = CmapRecord() val record = CmapRecord()
record.platformID = FontReader.ReadUInt16() record.platformID = fontReader.readUInt16()
record.encodingID = FontReader.ReadUInt16() record.encodingID = fontReader.readUInt16()
record.offset = FontReader.ReadUInt32() record.offset = fontReader.readUInt32()
cmap.records.add(record) cmap.records.add(record)
} }
for (i in 0 until cmap.numTables.toInt()) { for (i in 0 until cmap.numTables.toInt()) {
val fmtOffset = cmap.records[i].offset; val fmtOffset = cmap.records[i].offset
FontReader.Index = (Temp.offset + fmtOffset).toInt(); fontReader.Index = (temp.offset + fmtOffset).toInt()
val EndIndex = FontReader.Index; 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 { when {
format.equals(0) -> { format.equals(0) -> {
val fmt = CmapFormat0() val fmt = CmapFormat0()
fmt.format = format fmt.format = format
fmt.length = FontReader.ReadUInt16() fmt.length = fontReader.readUInt16()
fmt.language = FontReader.ReadUInt16() fmt.language = fontReader.readUInt16()
fmt.glyphIdArray = FontReader.GetBytes(fmt.length.toInt() - 6) fmt.glyphIdArray = fontReader.getBytes(fmt.length.toInt() - 6)
cmap.tables[fmtOffset] = fmt cmap.tables[fmtOffset] = fmt
} }
format.equals(4) -> { format.equals(4) -> {
val fmt = CmapFormat4() val fmt = CmapFormat4()
fmt.format = format fmt.format = format
fmt.length = FontReader.ReadUInt16() fmt.length = fontReader.readUInt16()
fmt.language = FontReader.ReadUInt16() fmt.language = fontReader.readUInt16()
fmt.segCountX2 = FontReader.ReadUInt16() fmt.segCountX2 = fontReader.readUInt16()
val segCount = fmt.segCountX2.toInt() / 2 val segCount = fmt.segCountX2.toInt() / 2
fmt.searchRange = FontReader.ReadUInt16() fmt.searchRange = fontReader.readUInt16()
fmt.entrySelector = FontReader.ReadUInt16() fmt.entrySelector = fontReader.readUInt16()
fmt.rangeShift = FontReader.ReadUInt16() fmt.rangeShift = fontReader.readUInt16()
fmt.endCode = FontReader.GetUInt16Array(segCount) fmt.endCode = fontReader.getUInt16Array(segCount)
fmt.reservedPad = FontReader.ReadUInt16() fmt.reservedPad = fontReader.readUInt16()
fmt.startCode = FontReader.GetUInt16Array(segCount) fmt.startCode = fontReader.getUInt16Array(segCount)
fmt.idDelta = FontReader.GetInt16Array(segCount) fmt.idDelta = fontReader.getInt16Array(segCount)
fmt.idRangeOffset = FontReader.GetUInt16Array(segCount) fmt.idRangeOffset = fontReader.getUInt16Array(segCount)
fmt.glyphIdArray = FontReader.GetUInt16Array((fmt.length.toInt() - (FontReader.Index - EndIndex)) / 2) fmt.glyphIdArray =
fontReader.getUInt16Array((fmt.length.toInt() - (fontReader.Index - endIndex)) / 2)
cmap.tables[fmtOffset] = fmt cmap.tables[fmtOffset] = fmt
} }
format.equals(6) -> { format.equals(6) -> {
val fmt = CmapFormat6() val fmt = CmapFormat6()
fmt.format = format fmt.format = format
fmt.length = FontReader.ReadUInt16() fmt.length = fontReader.readUInt16()
fmt.language = FontReader.ReadUInt16() fmt.language = fontReader.readUInt16()
fmt.firstCode = FontReader.ReadUInt16() fmt.firstCode = fontReader.readUInt16()
fmt.entryCount = FontReader.ReadUInt16() fmt.entryCount = fontReader.readUInt16()
fmt.glyphIdArray = FontReader.GetUInt16Array(fmt.entryCount.toInt()) fmt.glyphIdArray = fontReader.getUInt16Array(fmt.entryCount.toInt())
cmap.tables[fmtOffset] = fmt cmap.tables[fmtOffset] = fmt
} }
format.equals(12) -> { format.equals(12) -> {
val fmt = CmapFormat12() val fmt = CmapFormat12()
fmt.format = format fmt.format = format
fmt.reserved = FontReader.ReadUInt16(); fmt.reserved = fontReader.readUInt16()
fmt.length = FontReader.ReadUInt32(); fmt.length = fontReader.readUInt32()
fmt.language = FontReader.ReadUInt32(); fmt.language = fontReader.readUInt32()
fmt.numGroups = FontReader.ReadUInt32(); fmt.numGroups = fontReader.readUInt32()
for (n in 0 until fmt.numGroups.toLong()) { for (n in 0 until fmt.numGroups.toLong()) {
fmt.groups.add(Triple(FontReader.ReadUInt32(), FontReader.ReadUInt32(), FontReader.ReadUInt32())) fmt.groups.add(
Triple(
fontReader.readUInt32(),
fontReader.readUInt32(),
fontReader.readUInt32()
)
)
} }
cmap.tables[fmtOffset] = fmt cmap.tables[fmtOffset] = fmt
} }
@ -409,30 +421,30 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
} }
} }
// 解析表 glyf (字体轮廓数据表) // 解析表 glyf (字体轮廓数据表)
for (Temp in directorys) { for (temp in directorys) {
if (Temp.tag == "glyf") { if (temp.tag == "glyf") {
FontReader.Index = Temp.offset.toInt() fontReader.Index = temp.offset.toInt()
for (i in 0 until maxp.numGlyphs.toInt()) { for (i in 0 until maxp.numGlyphs.toInt()) {
FontReader.Index = (Temp.offset + loca[i]).toInt() fontReader.Index = (temp.offset + loca[i]).toInt()
val g = GlyfLayout() val g = GlyfLayout()
g.numberOfContours = FontReader.ReadInt16() g.numberOfContours = fontReader.readInt16()
g.xMin = FontReader.ReadInt16() g.xMin = fontReader.readInt16()
g.yMin = FontReader.ReadInt16() g.yMin = fontReader.readInt16()
g.xMax = FontReader.ReadInt16() g.xMax = fontReader.readInt16()
g.yMax = FontReader.ReadInt16() g.yMax = fontReader.readInt16()
if (g.numberOfContours > 0) { if (g.numberOfContours > 0) {
g.endPtsOfContours = FontReader.GetUInt16Array(g.numberOfContours.toInt()) g.endPtsOfContours = fontReader.getUInt16Array(g.numberOfContours.toInt())
g.instructionLength = FontReader.ReadUInt16() g.instructionLength = fontReader.readUInt16()
g.instructions = FontReader.GetBytes(g.instructionLength.toInt()) g.instructions = fontReader.getBytes(g.instructionLength.toInt())
val flagLength = g.endPtsOfContours.last().toInt() + 1 val flagLength = g.endPtsOfContours.last().toInt() + 1
// 获取轮廓点描述标志 // 获取轮廓点描述标志
g.flags = ArrayList(flagLength) g.flags = ArrayList(flagLength)
var n = 0 var n = 0
while (n < flagLength) { while (n < flagLength) {
g.flags[n] = FontReader.GetByte(); g.flags[n] = fontReader.getByte()
if ((g.flags[n].and(0x08)).toInt() != 0x00) { if ((g.flags[n].and(0x08)).toInt() != 0x00) {
for (m in FontReader.GetByte() downTo 1) { for (m in fontReader.getByte() downTo 1) {
g.flags[++n] = g.flags[n - 1] g.flags[++n] = g.flags[n - 1]
} }
} }
@ -443,9 +455,9 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
for (m in 0 until flagLength) { for (m in 0 until flagLength) {
val same = if ((g.flags[m].and(0x10)).toInt() != 0) 1 else -1 val same = if ((g.flags[m].and(0x10)).toInt() != 0) 1 else -1
if ((g.flags[m].and(0x02)).toInt() != 0) { if ((g.flags[m].and(0x02)).toInt() != 0) {
g.xCoordinates[m] = (same * FontReader.GetByte()).toShort() g.xCoordinates[m] = (same * fontReader.getByte()).toShort()
} else { } else {
g.xCoordinates[m] = if (same == 1) 0 else FontReader.ReadInt16() g.xCoordinates[m] = if (same == 1) 0 else fontReader.readInt16()
} }
} }
// 获取轮廓点描述y轴相对值 // 获取轮廓点描述y轴相对值
@ -453,9 +465,9 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
for (m in 0 until flagLength) { for (m in 0 until flagLength) {
val same = if ((g.flags[m].and(0x20)).toInt() != 0) 1 else -1 val same = if ((g.flags[m].and(0x20)).toInt() != 0) 1 else -1
if ((g.flags[m].and(0x04)).toInt() != 0) { if ((g.flags[m].and(0x04)).toInt() != 0) {
g.yCoordinates[n] = (same * FontReader.GetByte()).toShort() g.yCoordinates[n] = (same * fontReader.getByte()).toShort()
} else { } else {
g.yCoordinates[n] = if (same == 1) 0 else FontReader.ReadInt16() g.yCoordinates[n] = if (same == 1) 0 else fontReader.readInt16()
} }
} }
/* /*
@ -467,7 +479,7 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
} }
*/ */
glyf.add(g); glyf.add(g)
} else { } else {
// 复合字体暂未使用 // 复合字体暂未使用
} }
@ -477,13 +489,13 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
// 建立Unicode&Glyf映射表 // 建立Unicode&Glyf映射表
for (i in 0..130000) { for (i in 0..130000) {
val gid = GetGlyfIndex(i).toInt() val gid = getGlyfIndex(i).toInt()
if (gid == 0) continue; if (gid == 0) continue
if (unicodeMap.containsKey(gid)) continue if (unicodeMap.containsKey(gid)) continue
val thisGlyf = ArrayList<Short>() val thisGlyf = ArrayList<Short>()
thisGlyf.addAll(glyf[gid].xCoordinates) thisGlyf.addAll(glyf[gid].xCoordinates)
thisGlyf.addAll(glyf[gid].yCoordinates) thisGlyf.addAll(glyf[gid].yCoordinates)
unicodeMap[i] = thisGlyf; unicodeMap[i] = thisGlyf
} }
} }
@ -492,78 +504,84 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
/** /**
* 获取字体信息 (默认获取字体名称,索引位1) * 获取字体信息 (默认获取字体名称,索引位1)
*/ */
fun GetNameById(nameId: Int = 1): String { @Suppress("unused")
fun getNameById(nameId: Int = 1): String {
for (Temp in directorys) { for (Temp in directorys) {
if (Temp.tag != "name") continue; if (Temp.tag != "name") continue
FontReader.Index = Temp.offset.toInt(); fontReader.Index = Temp.offset.toInt()
break; break
} }
for (record in name.records) { for (record in name.records) {
if (record.nameID.toInt() != nameId) continue; if (record.nameID.toInt() != nameId) continue
FontReader.Index = FontReader.Index + (name.stringOffset + record.offset).toInt(); 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 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)) 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 * 使用Unicode值查找轮廓索引
*/ */
private fun GetGlyfIndex(code: Int): Long { private fun getGlyfIndex(code: Int): Long {
var fmtKey: UInt = 0u; var fmtKey: UInt = 0u
for (record in cmap.records) { for (record in cmap.records) {
for (item in pps) { for (item in pps) {
if ((item.first == record.platformID) && (item.second == record.encodingID)) { if ((item.first == record.platformID) && (item.second == record.encodingID)) {
fmtKey = record.offset; fmtKey = record.offset
break; 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) { if (cmap.tables[fmtKey] is CmapFormat0) {
val tab = cmap.tables[fmtKey] as CmapFormat0 val tab = cmap.tables[fmtKey] as CmapFormat0
if (code >= tab.glyphIdArray.size) glyfID = 0; if (code >= tab.glyphIdArray.size) glyfID = 0
else glyfID = tab.glyphIdArray[code].toLong(); else glyfID = tab.glyphIdArray[code].toLong()
} else if (cmap.tables[fmtKey] is CmapFormat4) { } else if (cmap.tables[fmtKey] is CmapFormat4) {
val tab = cmap.tables[fmtKey] as 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 // 二分法查找数值索引
var start = 0 var start = 0
var middle: Int var middle: Int
var end = tab.endCode.size - 1; var end = tab.endCode.size - 1
while (start + 1 != end) { while (start + 1 != end) {
middle = (start + end) / 2; middle = (start + end) / 2
if (tab.endCode[middle] <= code.toUInt()) start = middle; if (tab.endCode[middle] <= code.toUInt()) start = middle
else end = middle; else end = middle
} }
if (tab.endCode[start] < code.toUInt()) ++start; if (tab.endCode[start] < code.toUInt()) ++start
if (code.toUInt() < tab.startCode[start]) return 0; if (code.toUInt() < tab.startCode[start]) return 0
glyfID = if (tab.idRangeOffset[start].toInt() != 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(); tab.glyphIdArray[code - tab.startCode[start].toInt() + (tab.idRangeOffset[start].toInt() / 2) - (tab.idRangeOffset.size - start)].toLong()
} else (code + tab.idDelta[start]).toLong(); } else (code + tab.idDelta[start]).toLong()
glyfID = glyfID.and(0xFFFF) glyfID = glyfID.and(0xFFFF)
} else if (cmap.tables[fmtKey] is CmapFormat6) { } else if (cmap.tables[fmtKey] is CmapFormat6) {
val tab = cmap.tables[fmtKey] as 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() glyfID = if (index < 0 || index >= tab.glyphIdArray.size) 0 else tab.glyphIdArray[index].toLong()
} else if (cmap.tables[fmtKey] is CmapFormat12) { } else if (cmap.tables[fmtKey] is CmapFormat12) {
val tab = (cmap.tables[fmtKey] as CmapFormat12); val tab = (cmap.tables[fmtKey] as CmapFormat12)
if (code > tab.groups.last().second.toInt()) return 0; if (code > tab.groups.last().second.toInt()) return 0
// 二分法查找数值索引 // 二分法查找数值索引
var start = 0 var start = 0
var middle: Int var middle: Int
var end = tab.groups.size - 1; var end = tab.groups.size - 1
while (start + 1 != end) { while (start + 1 != end) {
middle = (start + end) / 2; middle = (start + end) / 2
if (tab.groups[middle].first.toInt() <= code) start = middle; if (tab.groups[middle].first.toInt() <= code) start = middle
else end = middle; else end = middle
} }
if (tab.groups[start].first.toInt() <= code && code <= tab.groups[start].second.toInt()) { 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 return glyfID
@ -572,30 +590,29 @@ class QueryTTF(var Font: ByteArray) : JsExtensions {
/** /**
* 使用轮廓数据获取Unicode值 * 使用轮廓数据获取Unicode值
*/ */
public fun GetCodeByGlyf(inputGlyf:List<Short>): Int { @Suppress("unused")
var unicodeVal = 0; fun getCodeByGlyf(inputGlyf: List<Short>): Int {
if(inputGlyf.isEmpty()) return 0; var unicodeVal = 0
for(g in unicodeMap) if (inputGlyf.isEmpty()) return 0
{ for (g in unicodeMap) {
if (inputGlyf.size != g.value.size) continue; if (inputGlyf.size != g.value.size) continue
var isFound = true; var isFound = true
for(i in inputGlyf.indices) for (i in inputGlyf.indices) {
{
if (inputGlyf[i] != g.value[i]) { if (inputGlyf[i] != g.value[i]) {
isFound = false; isFound = false
break; 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 * 使用Unicode值获取轮廓数据
*/ */
public fun GetGlyfByCode(code:Int): ArrayList<Short> @Suppress("unused")
{ fun getGlyfByCode(code: Int): ArrayList<Short> {
if (code <= 0) return ArrayList() if (code <= 0) return ArrayList()
return unicodeMap.getOrDefault(code, ArrayList()) return unicodeMap.getOrDefault(code, ArrayList())
} }

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