curioustorvald/Terrarum-sans-bitmap
1
0
Fork 0
mirror of https://github.com/curioustorvald/Terrarum-sans-bitmap.git synced 2026-06-06 05:58:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

devanagari ligation wip

Browse Source
This commit is contained in:
minjaesong
2022-01-18 17:56:15 +09:00
parent 0870856674
commit 9675c40216
5 changed files with 291 additions and 135 deletions
Download Patch File Download Diff File Expand all files Collapse all files

BIN
assets/devanagari_variable.tga LFS
View File

Binary file not shown.

182
src/net/torvald/terrarumsansbitmap/gdx/TerrarumSansBitmap.kt
View File

@@ -1035,17 +1035,30 @@ class TerrarumSansBitmap(
// basically an Unicode NFD with some additional flavours
private fun CodepointSequence.normalise(): CodepointSequence {
val dis = this.utf16to32()
val seq = CodepointSequence()
val seq2 = CodepointSequence()
val yankedCharacters = Stack<Pair<Int, CodePoint>>() // Stack of <Position, CodePoint>; codepoint use -1 if not applicable
fun emptyOutYanked() {
while (!yankedCharacters.empty()) {
val poppedChar = yankedCharacters.pop()
if (poppedChar.second == DEVANAGARI_RA)
seq.add(DEVANAGARI_RA_SUPER)
else
seq.add(yankedCharacters.pop().second)
}
}
var i = 0
this.utf16to32().let { dis ->
while (i < dis.size) {
val c = dis[i]
val cPrev2 = dis.getOrElse(i-2) { -1 }
val cPrev = dis.getOrElse(i-1) { -1 }
val c = dis[i]
val cNext = dis.getOrElse(i+1) { -1 }
val cNext2 = dis.getOrElse(i+2) { -1 }
// can't use regular sliding window as the 'i' value is changed way too often
// LET THE NORMALISATION BEGIN //
@@ -1137,11 +1150,26 @@ class TerrarumSansBitmap(
// END of tamil subsystem implementation
// BEGIN of devanagari string replacer
else if (c == DEVANAGARI_VIRAMA) {
yankedCharacters.push(i-1 to cPrev)
// Unicode Devanagari Rendering Rule R6-R8
// (this must precede the ligaturing-machine coded on the 2nd pass, otherwise the rules below will cause undesirable effects)
else if (devanagariConsonants.contains(c) && cNext == DEVANAGARI_VIRAMA && cNext2 == DEVANAGARI_RA) {
seq.addAll(toRaAppended(c))
i += 2
}
else if (c == DEVANAGARI_RA) {
// Unicode Devanagari Rendering Rule R5
else if (c == DEVANAGARI_RRA && cNext == DEVANAGARI_VIRAMA || c == DEVANAGARI_RA && cNext == DEVANAGARI_VIRAMA && cNext2 == ZWJ) {
seq.add(DEVANAGARI_EYELASH_RA)
i += 1
}
// Unicode Devanagari Rendering Rule R2-R4
else if (c == DEVANAGARI_RA && cNext == DEVANAGARI_VIRAMA && cNext2 != DEVANAGARI_RA) {
yankedCharacters.push(i to c)
i += 1
}
// Unicode Devanagari Rendering Rule R2-R4
else if (!isDevanagari(c) && !yankedCharacters.empty()) {
emptyOutYanked()
seq.add(c)
}
// WIP
// END of devanagari string replacer
@@ -1164,7 +1192,11 @@ class TerrarumSansBitmap(
i++
}
emptyOutYanked()
}
// second scan
// swap position of {letter, diacritics that comes before the letter}
i = 1
while (i <= seq.lastIndex) {
@@ -1175,6 +1207,27 @@ class TerrarumSansBitmap(
seq[i] = t
}
val cPrev2 = seq.getOrElse(i-2) { -1 }
val cPrev = seq.getOrElse(i-1) { -1 }
val c = seq[i]
// BEGIN of Devanagari String Replacer 2 (lookbehind type)
// Devanagari Ligations (Lookbehind)
if (devanagariConsonants.contains(cPrev2) && cPrev == DEVANAGARI_VIRAMA && devanagariConsonants.contains(c)) {
i -= 2
repeat(3) { seq.removeAt(i) }
val ligature = ligateIndicConsonants(cPrev2, c)
ligature.forEachIndexed { index, char ->
seq.add(i + index, char)
}
i += ligature.size
}
// END of Devanagari String Replacer 2
i++
}
@@ -1630,13 +1683,130 @@ class TerrarumSansBitmap(
'j'.toInt() to 0x237
)
private val tamilLigatingConsonants = listOf('க','ங','ச','ஞ','ட','ண','த','ந','ன','ப','ம','ய','ர','ற','ல','ள','ழ','வ').map { it.toInt() }.toIntArray()
private val ZWJ = 0x200D
private val tamilLigatingConsonants = listOf('க','ங','ச','ஞ','ட','ண','த','ந','ன','ப','ம','ய','ர','ற','ல','ள','ழ','வ').map { it.toInt() }.toIntArray()
private val TAMIL_KSSA = 0xF00ED
private val TAMIL_SHRII = 0xF00EE
private val devanagariConsonants = ((0x0915..0x0939) + (0x0958..0x095F) + (0x0978..0x097F) + (0xF0140..0xF01FF)).toIntArray()
private val devanagariBaseConsonants = 0x0915..0x0939
private val devanagariBaseConsonantsWithNukta = 0x0958..0x095F
private val devanagariBaseConsonantsExtended = 0x0978..0x097F
private val devanagariPresentationFormsConsonants = 0xF0140..0xF01FF
private val DEVANAGARI_VIRAMA = 0x94D
private val DEVANAGARI_RA = 0x930
private val DEVANAGARI_RRA = 0x931
private val DEVANAGARI_RA_SUPER = 0xF0104
private val DEVANAGARI_EYELASH_RA = 0xF012A
private val DEVANAGARI_LIG_K_SS = 0xF0181
private val DEVANAGARI_LIG_J_NY = 0xF0184
private val DEVANAGARI_LIG_T_T = 0xF018B
private val DEVANAGARI_LIG_T_R = 0xF0154
private val DEVANAGARI_LIG_SH_R = 0xF0166
private val DEVANAGARI_HALFLIG_K_SS = 0xF012B
private val DEVANAGARI_HALFLIG_J_NY = 0xF012C
private val DEVANAGARI_HALFLIG_T_T = 0xF012D
private val DEVANAGARI_HALFLIG_T_R = 0xF012E
private val DEVANAGARI_HALFLIG_SH_R = 0xF012F
private val DEVANAGARI_SYLL_RU = 0xF0100
private val DEVANAGARI_SYLL_RUU = 0xF0101
private val DEVANAGARI_HALF_FORMS = 0xF0100 // starting point for Devanagari half forms
private val DEVANAGARI_LIG_X_R = 0xF0140 // starting point for Devanagari ligature CONSONANT+RA
private fun CodePoint.toHalfFormOrNull(): CodePoint? {
if (this in devanagariBaseConsonants) return (this - 0x0910 + DEVANAGARI_HALF_FORMS)
if (this in devanagariBaseConsonantsWithNukta) return (this - 0x0920 + DEVANAGARI_HALF_FORMS)
else if (this == DEVANAGARI_LIG_K_SS) return DEVANAGARI_HALFLIG_K_SS
else if (this == DEVANAGARI_LIG_J_NY) return DEVANAGARI_HALFLIG_J_NY
else if (this == DEVANAGARI_LIG_T_T) return DEVANAGARI_HALFLIG_T_T
else if (this == DEVANAGARI_LIG_T_R) return DEVANAGARI_HALFLIG_T_R
else if (this == DEVANAGARI_LIG_SH_R) return DEVANAGARI_HALFLIG_SH_R
// TODO half forms of X_R-ligatures
else return null
}
// TODO use proper version of Virama for respective scripts
private fun CodePoint.toHalfFormOrVirama(): List<CodePoint> = this.toHalfFormOrNull().let {
if (it == null) listOf(this, DEVANAGARI_VIRAMA) else listOf(it)
}
// TODO use proper version of Virama for respective scripts
private fun toRaAppended(c: CodePoint): List<CodePoint> {
if (c in devanagariBaseConsonants) return listOf(c - 0x0910 + DEVANAGARI_LIG_X_R)
else return listOf(c, DEVANAGARI_VIRAMA, DEVANAGARI_RA)
}
private fun ligateIndicConsonants(c1: CodePoint, c2: CodePoint): List<CodePoint> {
if (c2 == DEVANAGARI_RA) return toRaAppended(c1) // Devanagari @.RA
when (c1) {
0x0915 -> /* Devanagari KA */ when (c2) {
0x0924 -> return listOf(0xF0180) // K.TA
0x0937 -> return listOf(DEVANAGARI_LIG_K_SS) // K.SSA
else -> return c1.toHalfFormOrVirama() + c2
}
0x0919 -> /* Devanagari NGA */ when (c2) {
0x0917 -> return listOf(0xF0182) // NG.G
0x092E -> return listOf(0xF0183) // NG.M
else -> return c1.toHalfFormOrVirama() + c2
}
0x091C -> /* Devanagari JA */ when (c2) {
0x091E -> return listOf(DEVANAGARI_LIG_J_NY) // J.NY
else -> return c1.toHalfFormOrVirama() + c2
}
0x091F -> /* Devanagari TTA */ when (c2) {
0x091F -> return listOf(0xF0185) // TT.TT
0x0920 -> return listOf(0xF0186) // TT.TTH
else -> return c1.toHalfFormOrVirama() + c2
}
0x0920 -> /* Devanagari TTHA */ when (c2) {
0x0920 -> return listOf(0xF0187) // TTH.TTH
else -> return c1.toHalfFormOrVirama() + c2
}
0x0921 -> /* Devanagari DDA */ when (c2) {
0x0921 -> return listOf(0xF0188) // DD.DD
0x0922 -> return listOf(0xF0189) // DD.DDH
else -> return c1.toHalfFormOrVirama() + c2
}
0x0922 -> /* Devanagari DDHA */ when (c2) {
0x0922 -> return listOf(0xF018A) // DDH.DDH
else -> return c1.toHalfFormOrVirama() + c2
}
0x0924 -> /* Devanagari TA */ when (c2) {
0x0924 -> return listOf(DEVANAGARI_LIG_T_T) // T.T
else -> return c1.toHalfFormOrVirama() + c2
}
0x0926 -> /* Devanagari DA */ when (c2) {
0x0926 -> return listOf(0xF018C) // D.D
0x0927 -> return listOf(0xF018D) // D.DH
0x092C -> return listOf(0xF018E) // D.B
0x092D -> return listOf(0xF018F) // D.BH
0x092E -> return listOf(0xF0190) // D.M
0x092F -> return listOf(0xF0191) // D.Y
0x0935 -> return listOf(0xF0192) // D.V
else -> return c1.toHalfFormOrVirama() + c2
}
0x0928 -> /* Devanagari NA */ when (c2) {
0x0928 -> return listOf(0xF0193) // N.N
else -> return c1.toHalfFormOrVirama() + c2
}
0x0939 -> /* Devanagari HA */ when (c2) {
0x0923 -> return listOf(0xF0194) // H.NN
0x0928 -> return listOf(0xF0195) // H.N
0x092E -> return listOf(0xF0196) // H.M
0x092F -> return listOf(0xF0197) // H.Y
0x0932 -> return listOf(0xF0198) // H.L
0x0935 -> return listOf(0xF0199) // H.v
else -> return c1.toHalfFormOrVirama() + c2
}
else -> return c1.toHalfFormOrVirama() + c2 // TODO use proper version of Virama for respective scripts
}
}
private fun Int.toHex() = "U+${this.toString(16).padStart(4, '0').toUpperCase()}"

BIN
testing.PNG
View File

Binary file not shown.
Side by Side Swipe Overlay

Before

Width:  |  Height:  |  Size: 14 KiB

After

Width:  |  Height:  |  Size: 16 KiB

18
testtext.txt
View File

@@ -1,17 +1,3 @@
A ดุ ตี ปู่ พี่ ป่ ม่ ปั มั พีุ ทิ่ท่ท่ิ ปิ่ป่ป่ิ ทิ้ ปิ้ มำด มําด
이는 일본의 요미가나(読み仮名)와 비슷한 용법이다.
Sugarさとう설탕砂糖
বাংলাদেশ
தமிழ் லூ லு
QWனோT
னோ
எழுத்து வடிவங்களுக்கு வார்த்தைகள் மற்றும் வாக்கியங்கள் போலவே தொனி, ஒலி பண்பு, தன்மை உண்டு.
க்ஷ ஶ்ரீ க்ஷௌ
फ़ॊण्ज़ीणू क्की क्कि र्क र्त्सा र्र्ल ऱ्ड क्राप् ठ्री त्र् त्र्मोत्र्यो ज्ञज्ञ्रत्त न्न
ह्णह्नह्मह्यह्लह्वह्र णनमयलव ज़्लतान

BIN
work_files/devanagari_variable.psd LFS
View File

Binary file not shown.