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Merge pull request #487 from gedoor/antecer

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实现TTF字体的(Unicode<->轮廓)双向查询功能
pull/488/head
Antecer 4 years ago committed by GitHub
parent 060495bfd3 1d6b57ed13
commit e9d1f65b21
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  1. 730
      app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt

730
app/src/main/java/io/legado/app/model/analyzeRule/QueryTTF.kt
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@ -1,6 +1,7 @@
package io.legado.app.model.analyzeRule
import io.legado.app.help.JsExtensions
import java.nio.charset.Charset
import kotlin.experimental.and
/**
@ -8,15 +9,8 @@ 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>
*/
@Suppress(
"unused", "RedundantExplicitType", "MemberVisibilityCanBePrivate",
"EqualsBetweenInconvertibleTypes", "ControlFlowWithEmptyBody"
)
@ExperimentalUnsignedTypes
class QueryTTF(var font: ByteArray) : JsExtensions {
data class Index(var num: Int)
class FileHeader {
class QueryTTF(var Font: Array<Byte>) : JsExtensions {
private class Header {
var majorVersion: UShort = 0u
var minorVersion: UShort = 0u
var numOfTables: UShort = 0u
@ -25,32 +19,30 @@ class QueryTTF(var font: ByteArray) : JsExtensions {
var rangeShift: UShort = 0u
}
class TableDirectory {
private class Directory {
var tag: String = ""
var checkSum: UInt = 0u
var offset: UInt = 0u
var length: UInt = 0u
lateinit var data: ByteArray
}
class NameTable {
private class NameLayout {
var format: UShort = 0u
var count: UShort = 0u
var stringOffset: UShort = 0u
var records = ArrayList<NameRecord>()
}
class NameRecord {
private class NameRecord {
var platformID: UShort = 0u
var encodingID: UShort = 0u
var languageID: UShort = 0u
var nameID: UShort = 0u
var length: UShort = 0u
var offset: UShort = 0u
lateinit var nameBuffer: ByteArray
}
class HeadTable {
private class HeadLayout {
var majorVersion: UShort = 0u
var minorVersion: UShort = 0u
var fontRevision: UInt = 0u
@ -71,7 +63,7 @@ class QueryTTF(var font: ByteArray) : JsExtensions {
var glyphDataFormat: Short = 0
}
class MaxpTable {
private class MaxpLayout {
var majorVersion: UShort = 0u
var minorVersion: UShort = 0u
var numGlyphs: UShort = 0u // 字体中的字形数量
@ -90,27 +82,27 @@ class QueryTTF(var font: ByteArray) : JsExtensions {
var maxComponentDepth: UShort = 0u
}
class CmapTable {
private class CmapLayout {
var version: UShort = 0u
var numTables: UShort = 0u
var records = ArrayList<EncodingRecord>()
var tables = mutableMapOf<Int, Any>()
var records = ArrayList<CmapRecord>()
var tables = mutableMapOf<UInt, Any>()
}
class EncodingRecord {
private class CmapRecord {
var platformID: UShort = 0u
var encodingID: UShort = 0u
var offset: UInt = 0u
}
class Format0 {
private class CmapFormat0 {
var format: UShort = 0u
var length: UShort = 0u
var language: UShort = 0u
var glyphIdArray = ByteArray(256)
var glyphIdArray = ArrayList<Byte>()
}
class Format4 {
private class CmapFormat4 {
var format: UShort = 0u
var length: UShort = 0u
var language: UShort = 0u
@ -118,387 +110,493 @@ class QueryTTF(var font: ByteArray) : JsExtensions {
var searchRange: UShort = 0u
var entrySelector: UShort = 0u
var rangeShift: UShort = 0u
lateinit var endCode: IntArray // UInt16[]
lateinit var endCode: ArrayList<UShort> // UInt16[]
var reservedPad: UShort = 0u
lateinit var startCode: IntArray // UInt16[]
lateinit var idDelta: ShortArray
lateinit var idRangeOffset: IntArray // UInt16[]
lateinit var startCode: ArrayList<UShort> // UInt16[]
lateinit var idDelta: ArrayList<Short>
lateinit var idRangeOffset: ArrayList<UShort> // UInt16[]
var glyphIdArray = ArrayList<UShort>()
}
class GlyfTable {
private class CmapFormat6 {
var format: UShort = 0u
var length: UShort = 0u
var language: UShort = 0u
var firstCode: UShort = 0u
var entryCount: UShort = 0u
var glyphIdArray = ArrayList<UShort>()
}
private class CmapFormat12 {
var format: UShort = 0u
var reserved: UShort = 0u
var length: UInt = 0u
var language: UInt = 0u
var numGroups: UInt = 0u
lateinit var groups: ArrayList<Triple<UInt, UInt, UInt>>
}
private class GlyfLayout {
var numberOfContours: Short = 0
var xMin: Short = 0
var yMin: Short = 0
var xMax: Short = 0
var yMax: Short = 0
lateinit var endPtsOfContours: IntArray // UInt16[]
var instructionLength: Int = 0 // UInt16
lateinit var instructions: ByteArray
lateinit var flags: ByteArray
lateinit var xCoordinates: Array<Short>
lateinit var yCoordinates: Array<Short>
lateinit var endPtsOfContours: ArrayList<UShort> // UInt16[]
var instructionLength: UShort = 0u // UInt16
lateinit var instructions: ArrayList<Byte>
lateinit var flags: ArrayList<Byte>
lateinit var xCoordinates: ArrayList<Short>
lateinit var yCoordinates: ArrayList<Short>
}
var header = FileHeader()
var tables = mutableMapOf<String, TableDirectory>()
private class ByteArrayReader(var Buffer: Array<Byte>, var Index: Int) {
fun ReadUIntX(len: Long): ULong {
var result: ULong = 0u;
for (i in 0 until len) {
result.shl(8);
result = result or Buffer[Index++].toULong()
}
return result;
}
var name = NameTable()
fun ReadUInt64(): ULong {
return ReadUIntX(8)
}
var head = HeadTable()
fun ReadInt64(): Long {
return ReadUIntX(8).toLong()
}
var maxp = MaxpTable()
fun ReadUInt32(): UInt {
return ReadUIntX(4).toUInt()
}
var loca = ArrayList<UInt>()
fun ReadInt32(): Int {
return ReadUIntX(4).toInt()
}
var cmap = CmapTable()
fun ReadUInt16(): UShort {
return ReadUIntX(2).toUShort()
}
var glyf = ArrayList<GlyfTable>()
fun ReadInt16(): Short {
return ReadUIntX(2).toShort()
}
// ByteArray转Long整数
private fun byteArrToUintx(buff: ByteArray): Long {
var result: Long = 0
var n: Int = 0
var i: Int = buff.size
while (i > 0) {
result = result or buff[--i].toLong().shl(n)
n += 8
fun ReadStrings(len: Int, charset: Charset): String {
if (len <= 0) return ""
val result = ByteArray(len)
for (i in 0 until len) {
result[i] = Buffer[Index++]
}
return result
return result.toString(charset)
}
// 索引变量
private var index = 0
fun GetByte(): Byte {
return Buffer[Index++]
}
// 从索引index开始拷贝指定长度的数组
private fun ByteArray.copyOfIndex(length: Int): ByteArray {
val fromIndex = index
index += length
return this.copyOfRange(fromIndex, fromIndex + length)
fun GetBytes(len: Int): ArrayList<Byte> {
if (len <= 0) return ArrayList(0)
val result = ArrayList<Byte>(len)
for (i in 0 until len) {
result[i] = Buffer[Index++]
}
return result;
}
// 从索引fromIndex开始拷贝指定长度的数组
private fun ByteArray.copyOfIndex(fromIndex: Int, length: Int): ByteArray {
return this.copyOfRange(fromIndex, fromIndex + length)
fun GetUInt16Array(len: Int): ArrayList<UShort> {
if (len <= 0) return ArrayList(0)
val result = ArrayList<UShort>(len)
for (i in 0 until len) {
result[i] = ReadUInt16()
}
return result;
}
init {
fun GetInt16Array(len: Int): ArrayList<Short> {
if (len <= 0) return ArrayList(0)
val result = ArrayList<Short>(len)
for (i in 0 until len) {
result[i] = ReadInt16()
}
return result;
}
}
// 解析文件头
header = FileHeader()
// 跳过不需要的数据条目
index = 4
header.numOfTables = byteArrToUintx(font.copyOfIndex(2)).toUShort()
private var FontReader: ByteArrayReader
private var fileHeader = Header()
private var directorys = ArrayList<Directory>()
private var name = NameLayout()
private var head = HeadLayout()
private var maxp = MaxpLayout()
private var loca = ArrayList<UInt>()
private var cmap = CmapLayout()
private var glyf = ArrayList<GlyfLayout>()
private var unicodeMap = mutableMapOf<Int, ArrayList<Short>>()
// 获取数据表
index = 12
for (i in 0 until header.numOfTables.toInt()) {
val table = TableDirectory()
table.tag = font.copyOfIndex(4).toString(Charsets.US_ASCII)
table.checkSum = byteArrToUintx(font.copyOfIndex(4)).toUInt()
table.offset = byteArrToUintx(font.copyOfIndex(4)).toUInt()
table.length = byteArrToUintx(font.copyOfIndex(4)).toUInt()
table.data = font.copyOfIndex(table.offset.toInt(), table.length.toInt())
tables[table.tag] = table
init {
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();
// 获取目录
for (i in 0 until fileHeader.numOfTables.toInt()) {
val tag = FontReader.ReadStrings(4, Charsets.US_ASCII)
val t = Directory();
t.tag = tag
t.checkSum = FontReader.ReadUInt32()
t.offset = FontReader.ReadUInt32()
t.length = FontReader.ReadUInt32()
directorys.add(t)
}
// 解析表 name (字体信息,包含版权、名称、作者等...)
run {
val data = tables["name"]!!.data
index = 0
name.format = byteArrToUintx(data.copyOfIndex(2)).toUShort()
name.count = byteArrToUintx(data.copyOfIndex(2)).toUShort()
name.stringOffset = byteArrToUintx(data.copyOfIndex(2)).toUShort()
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();
for (i in 0 until name.count.toInt()) {
val record = NameRecord()
record.platformID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.encodingID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.languageID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.nameID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.length = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.offset = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.nameBuffer = data.copyOfIndex(
(name.stringOffset + record.offset).toInt(),
record.length.toInt()
)
name.records.add(record)
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)
run {
val data = tables["head"]!!.data
index = 0
head.majorVersion = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.minorVersion = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.fontRevision = byteArrToUintx(data.copyOfIndex(4)).toUInt()
head.checkSumAdjustment = byteArrToUintx(data.copyOfIndex(4)).toUInt()
head.magicNumber = byteArrToUintx(data.copyOfIndex(4)).toUInt()
head.flags = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.unitsPerEm = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.created = byteArrToUintx(data.copyOfIndex(8)).toULong()
head.modified = byteArrToUintx(data.copyOfIndex(8)).toULong()
head.xMin = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.yMin = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.xMax = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.yMax = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.macStyle = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.lowestRecPPEM = byteArrToUintx(data.copyOfIndex(2)).toUShort()
head.fontDirectionHint = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.indexToLocFormat = byteArrToUintx(data.copyOfIndex(2)).toShort()
head.glyphDataFormat = byteArrToUintx(data.copyOfIndex(2)).toShort()
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();
}
}
// 解析表 maxp (获取 maxp.numGlyphs)
run {
val data = tables["maxp"]!!.data
index = 0
maxp.majorVersion = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.minorVersion = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.numGlyphs = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxPoints = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxContours = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxCompositePoints = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxCompositeContours = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxZones = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxTwilightPoints = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxStorage = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxFunctionDefs = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxInstructionDefs = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxStackElements = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxSizeOfInstructions = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxComponentElements = byteArrToUintx(data.copyOfIndex(2)).toUShort()
maxp.maxComponentDepth = byteArrToUintx(data.copyOfIndex(2)).toUShort()
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();
}
}
// 解析表 loca (轮廓数据偏移地址表)
run {
val data = tables["maxp"]!!.data
val offset = if (head.indexToLocFormat.equals(0)) 2 else 4
index = 0
while (index < data.size) {
loca.add((byteArrToUintx(data.copyOfIndex(offset)) * (if (offset == 4) 1 else 2)).toUInt())
index += offset
for (Temp in directorys) {
if (Temp.tag == "loca") {
FontReader.Index = Temp.offset.toInt()
val offset: UInt = if (head.indexToLocFormat.toInt() == 0) 2u else 4u
var i: UInt = 0u
while (i < Temp.length) {
loca.add(if (offset == 2u) FontReader.ReadUInt16().toUInt().shl(1) else FontReader.ReadUInt32())
i += offset
}
}
}
// 解析表 cmap (Unicode编码轮廓索引对照表)
run {
val data = tables["cmap"]!!.data
index = 0
cmap.version = byteArrToUintx(data.copyOfIndex(2)).toUShort()
cmap.numTables = byteArrToUintx(data.copyOfIndex(2)).toUShort()
for (Temp in directorys) {
if (Temp.tag == "cmap") {
FontReader.Index = Temp.offset.toInt()
cmap.version = FontReader.ReadUInt16()
cmap.numTables = FontReader.ReadUInt16()
for (i in 0 until cmap.numTables.toInt()) {
val record = EncodingRecord()
record.platformID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.encodingID = byteArrToUintx(data.copyOfIndex(2)).toUShort()
record.offset = byteArrToUintx(data.copyOfIndex(4)).toUInt()
val record = CmapRecord()
record.platformID = FontReader.ReadUInt16()
record.encodingID = FontReader.ReadUInt16()
record.offset = FontReader.ReadUInt32()
cmap.records.add(record)
val tmpIndex = index // 缓存索引
index = record.offset.toInt()
val fmt = byteArrToUintx(data.copyOfIndex(2)).toUShort()
val len = byteArrToUintx(data.copyOfIndex(2)).toUShort()
val lang = byteArrToUintx(data.copyOfIndex(2)).toUShort()
if (fmt.equals(0)) {
val ft = Format0()
ft.format = fmt
ft.length = len
ft.language = lang
ft.glyphIdArray = data.copyOfIndex(index, len.toInt() - 6)
cmap.tables[fmt.toInt()] = ft
} else if (fmt.equals(4)) {
val ft = Format4()
ft.format = fmt
ft.length = len
ft.language = lang
ft.segCountX2 = byteArrToUintx(data.copyOfIndex(2)).toUShort()
val segCount = ft.segCountX2.toInt() / 2
ft.searchRange = byteArrToUintx(data.copyOfIndex(2)).toUShort()
ft.entrySelector = byteArrToUintx(data.copyOfIndex(2)).toUShort()
ft.rangeShift = byteArrToUintx(data.copyOfIndex(2)).toUShort()
ft.endCode = IntArray(segCount)
for (n in 0 until segCount) {
ft.endCode[n] = byteArrToUintx(data.copyOfIndex(2)).toInt()
}
ft.reservedPad = byteArrToUintx(data.copyOfIndex(2)).toUShort()
ft.startCode = IntArray(segCount)
for (n in 0 until segCount) {
ft.startCode[n] = byteArrToUintx(data.copyOfIndex(2)).toInt()
}
ft.idDelta = ShortArray(segCount)
for (n in 0 until segCount) {
ft.idDelta[n] = byteArrToUintx(data.copyOfIndex(2)).toShort()
}
ft.idRangeOffset = IntArray(segCount)
for (n in 0 until segCount) {
ft.idRangeOffset[n] = byteArrToUintx(data.copyOfIndex(2)).toInt()
}
while (index < len.toInt()) {
ft.glyphIdArray.add(byteArrToUintx(data.copyOfIndex(2)).toUShort())
}
cmap.tables[fmt.toInt()] = ft
}
index = tmpIndex // 读取缓存的索引
}
}
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 format = FontReader.ReadUInt16();
if (cmap.tables.contains(fmtOffset.toInt())) continue;
when {
format.equals(0) -> {
val fmt = CmapFormat0()
fmt.format = format
fmt.length = FontReader.ReadUInt16()
fmt.language = FontReader.ReadUInt16()
fmt.glyphIdArray = FontReader.GetBytes(fmt.length.toInt() - 6)
cmap.tables[fmtOffset] = fmt
}
format.equals(4) -> {
val fmt = CmapFormat4()
fmt.format = format
fmt.length = FontReader.ReadUInt16()
fmt.language = FontReader.ReadUInt16()
fmt.segCountX2 = FontReader.ReadUInt16()
val segCount = fmt.segCountX2.toInt() / 2
fmt.searchRange = FontReader.ReadUInt16()
fmt.entrySelector = FontReader.ReadUInt16()
fmt.rangeShift = FontReader.ReadUInt16()
fmt.endCode = FontReader.GetUInt16Array(segCount)
fmt.reservedPad = FontReader.ReadUInt16()
fmt.startCode = FontReader.GetUInt16Array(segCount)
fmt.idDelta = FontReader.GetInt16Array(segCount)
fmt.idRangeOffset = FontReader.GetUInt16Array(segCount)
fmt.glyphIdArray = FontReader.GetUInt16Array((fmt.length.toInt() - (FontReader.Index - EndIndex)) / 2)
cmap.tables[fmtOffset] = fmt
}
format.equals(6) -> {
val fmt = CmapFormat6()
fmt.format = format
fmt.length = FontReader.ReadUInt16()
fmt.language = FontReader.ReadUInt16()
fmt.firstCode = FontReader.ReadUInt16()
fmt.entryCount = FontReader.ReadUInt16()
fmt.glyphIdArray = FontReader.GetUInt16Array(fmt.entryCount.toInt())
cmap.tables[fmtOffset] = fmt
}
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();
for (n in 0 until fmt.numGroups.toLong()) {
fmt.groups.add(Triple(FontReader.ReadUInt32(), FontReader.ReadUInt32(), FontReader.ReadUInt32()))
}
cmap.tables[fmtOffset] = fmt
}
}
}
}
}
// 解析表 glyf (字体轮廓数据表)
run {
val data = tables["glyf"]!!.data
for (Temp in directorys) {
if (Temp.tag == "glyf") {
FontReader.Index = Temp.offset.toInt()
for (i in 0 until maxp.numGlyphs.toInt()) {
index = loca[i].toInt()
val numberOfContours = byteArrToUintx(data.copyOfIndex(2)).toShort()
val xMin = byteArrToUintx(data.copyOfIndex(2)).toShort()
val yMin = byteArrToUintx(data.copyOfIndex(2)).toShort()
val xMax = byteArrToUintx(data.copyOfIndex(2)).toShort()
val yMax = byteArrToUintx(data.copyOfIndex(2)).toShort()
if (numberOfContours > 0) {
val g = GlyfTable()
g.numberOfContours = numberOfContours
g.xMin = xMin
g.yMin = yMin
g.xMax = xMax
g.yMax = yMax
g.endPtsOfContours = IntArray(numberOfContours.toInt())
for (n in 0 until numberOfContours) {
g.endPtsOfContours[n] =
byteArrToUintx(data.copyOfIndex(2)).toInt() // 这里数据源为UShort
}
g.instructionLength =
byteArrToUintx(data.copyOfIndex(2)).toInt() // 这里数据源为UShort
g.instructions = data.copyOfIndex(g.instructionLength)
val flagLength = g.endPtsOfContours.last() + 1
g.flags = ByteArray(flagLength)
FontReader.Index = (Temp.offset + loca[i]).toInt()
val g = GlyfLayout()
g.numberOfContours = FontReader.ReadInt16()
g.xMin = FontReader.ReadInt16()
g.yMin = FontReader.ReadInt16()
g.xMax = FontReader.ReadInt16()
g.yMax = FontReader.ReadInt16()
if (g.numberOfContours > 0) {
g.endPtsOfContours = FontReader.GetUInt16Array(g.numberOfContours.toInt())
g.instructionLength = FontReader.ReadUInt16()
g.instructions = FontReader.GetBytes(g.instructionLength.toInt())
val flagLength = g.endPtsOfContours.last().toInt() + 1
// 获取轮廓点描述标志
g.flags = ArrayList(flagLength)
var n = 0
while (n < flagLength) {
val flag = data.copyOfIndex(1).first()
g.flags[n] = flag
if (!(flag and 0x08).equals(0)) {
var j = data.copyOfIndex(1).first()
while (j > 0) {
--j
g.flags[++n] = flag
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]
}
}
++n
}
// 获取x轴相对坐标
g.xCoordinates = Array(flagLength) { 0 }
// 获取轮廓点描述x轴相对值
g.xCoordinates = ArrayList(flagLength)
for (m in 0 until flagLength) {
val xByte = !(g.flags[m] and 0x02).equals(0)
val xSame = !(g.flags[m] and 0x10).equals(0)
if (xByte) {
g.xCoordinates[m] =
((if (xSame) 1 else -1) * data.copyOfIndex(1).first()).toShort()
val same = if ((g.flags[m].and(0x10)).toInt() != 0) 1 else -1
if ((g.flags[m].and(0x02)).toInt() != 0) {
g.xCoordinates[m] = (same * FontReader.GetByte()).toShort()
} else {
if (xSame) g.xCoordinates[m] = 0
else {
g.xCoordinates[m] = byteArrToUintx(data.copyOfIndex(2)).toShort()
}
g.xCoordinates[m] = if (same == 1) 0 else FontReader.ReadInt16()
}
}
// 获取y轴相对坐标
g.yCoordinates = Array(flagLength) { 0 }
// 获取轮廓点描述y轴相对值
g.yCoordinates = ArrayList(flagLength)
for (m in 0 until flagLength) {
val yByte = !(g.flags[m] and 0x04).equals(0)
val ySame = !(g.flags[m] and 0x20).equals(0)
if (yByte) {
g.yCoordinates[m] =
((if (ySame) 1 else -1) * data.copyOfIndex(1).first()).toShort()
val same = if ((g.flags[m].and(0x20)).toInt() != 0) 1 else -1
if ((g.flags[m].and(0x04)).toInt() != 0) {
g.yCoordinates[n] = (same * FontReader.GetByte()).toShort()
} else {
if (ySame) g.yCoordinates[m] = 0
else {
g.yCoordinates[m] = byteArrToUintx(data.copyOfIndex(2)).toShort()
}
g.yCoordinates[n] = if (same == 1) 0 else FontReader.ReadInt16()
}
}
/*
PS:因为不需要绘制字体，转换就省了
// 相对坐标转绝对坐标
for (n in 0 until flagLength) {
g.xCoordinates[n] = (g.xCoordinates[n] + g.xCoordinates[n - 1]).toShort()
g.yCoordinates[n] = (g.yCoordinates[n] + g.yCoordinates[n - 1]).toShort()
// 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();
}
*/
glyf.add(g)
glyf.add(g);
} else {
// 复合字体暂不处理,以后用到再加
// 复合字体暂未使用
}
}
}
}
/**
* 获取字体信息（默认获取字体名称）
* @see <a href="https://docs.microsoft.com/en-us/typography/opentype/spec/name#name-ids">获取详情</a>
*/
fun getName(nameID: Int = 1): String {
for (record in name.records) {
if (!record.nameID.equals(nameID)) continue
if (record.platformID.equals(1) && record.encodingID.equals(0)) {
return record.nameBuffer.toString(Charsets.UTF_8)
} else if (record.platformID.equals(3) && record.encodingID.equals(1)) {
return record.nameBuffer.toString(Charsets.UTF_16BE)
// 建立Unicode&Glyf映射表
for (i in 0..130000) {
val gid = GetGlyfIndex(i).toInt()
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;
}
}
return "error"
}
/**
* 获取字体轮廓 (fontCode:十进制Unicode字符编码)
* 获取字体信息 (默认获取字体名称,索引位1)
*/
fun getGlyf(fontCode: Int): ArrayList<Short> {
var fontIndex = -1 // 轮廓索引
val fmt4 = cmap.tables.getOrDefault(4, null)
if (fmt4 != null) {
val fmt = (fmt4 as Format4)
val endCode = fmt.endCode
for (i in endCode.indices) {
if (endCode[i] == fontCode) {
fontIndex = i
break
fun GetNameById(nameId: Int = 1): String {
for (Temp in directorys) {
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);
}
when {
fontIndex == -1 -> fontIndex = 0
fontCode < fmt.startCode[fontIndex] -> fontIndex = 0
else -> {
fontIndex = if (fmt.idRangeOffset[fontIndex] != 0) {
val i = (fontCode - fmt.startCode[fontIndex]
+ fmt.idRangeOffset[fontIndex].ushr(1)
- (fmt.idRangeOffset.size - fontIndex))
fmt.glyphIdArray[i].toInt()
} else fontCode + fmt.idDelta[fontIndex]
fontIndex = fontIndex and 0xFFFF
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 ((item.first == record.platformID) && (item.second == record.encodingID)) {
fmtKey = record.offset;
break;
}
}
if (fmtKey > 0u) break;
}
if (fmtKey == 0u) return 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();
} else if (cmap.tables[fmtKey] is CmapFormat4) {
val tab = cmap.tables[fmtKey] as CmapFormat4
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;
}
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();
glyfID = glyfID.and(0xFFFF)
} else if (cmap.tables[fmtKey] is CmapFormat6) {
val tab = cmap.tables[fmtKey] as CmapFormat6
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;
// 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;
}
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();
}
}
return glyfID
}
} else {
val fmt0 = cmap.tables.getOrDefault(0, null)
if (fmt0 != null) {
val fmt = (fmt0 as Format0)
val glyphs = fmt.glyphIdArray
fontIndex = if (fontCode > glyphs.size) 0 else glyphs[fontCode].toInt()
/**
* 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)
{
if (inputGlyf[i] != g.value[i]) {
isFound = false;
break;
}
}
val glyph = ArrayList<Short>()
if (fontIndex > -1) {
// 将字体的轮廓坐标合并到一起返回，方便使用
glyph.addAll(glyf[fontIndex].xCoordinates)
glyph.addAll(glyf[fontIndex].yCoordinates)
if (isFound) unicodeVal = g.key;
}
return glyph
return unicodeVal;
}
/***
* 获取字体轮廓 (fontCode:单个String字符)
/**
* 使用Unicode值获取轮廓数据
*/
fun getGlyf(str: String): ArrayList<Short> {
return getGlyf(str.toInt())
public fun GetGlyfByCode(code:Int): ArrayList<Short>
{
if(code <= 0) return ArrayList()
return unicodeMap.getOrDefault(code, ArrayList())
}
}
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