sl@0: // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalComponent
sl@0: */
sl@0: 
sl@0: #include "FontIndic.h"
sl@0: #include <gdi.h>
sl@0: #include "GlyphSel.h"
sl@0: #include "ShapeInfo.h"
sl@0: #include "gdiinline.inl"
sl@0: 
sl@0: // State machine for determining syllable boundaries.
sl@0: // Key: D = Dependent vowel. V = Virama. N = Nukta
sl@0: // I = Independent Vowel. S = Candrabindu/Anusvara/Visarga
sl@0: // C = Consonant. J = zero-width joiner. X = Other
sl@0: // A = Addak (double the following constant)
sl@0: enum TSyllableState
sl@0: 	{
sl@0: 	EReject = -1,
sl@0: 	// Begin + I: add and move to IndependentVowel
sl@0: 	// Begin + C: add and move to Consonant
sl@0: 	// Begin + V/N/D/S/J/X: add and close syllable
sl@0: 	EBegin = 0,
sl@0: 	// Consonant + D: add and move to ConsonantVowel
sl@0: 	// Consonant + N: add
sl@0: 	// Consonant + V: add and move to Virama
sl@0: 	// Consonant + S: add and close syllable
sl@0: 	// Consonant + C/I/J/X: close syllable
sl@0: 	EConsonant = 1,
sl@0: 	// Consonant2 + D: add and move to ConsonantVowel
sl@0: 	// Consonant2 + N: add
sl@0: 	// Consonant2 + V: add and move to Virama2
sl@0: 	// Consonant2 + S: add and close syllable
sl@0: 	// Consonant2 + C/I/J/X: close syllable
sl@0: 	EConsonant2 = 2,
sl@0: 	// Consonant3 + D: add and move to ConsonantVowel
sl@0: 	// Consonant3 + N: add
sl@0: 	// Consonant3 + V: add and move to Virama3
sl@0: 	// Consonant3 + S: add and close syllable
sl@0: 	// Consonant3 + C/I/J/X: close syllable
sl@0: 	EConsonant3 = 3,
sl@0: 	// Consonant + D: add and move to ConsonantVowel
sl@0: 	// Consonant + N: add
sl@0: 	// Consonant + V: add and close syllable
sl@0: 	// Consonant + S: add and close syllable
sl@0: 	// Consonant + C/I/J/X: close syllable
sl@0: 	EConsonant4 = 4,
sl@0: 	// IndependentVowel + S: add
sl@0: 	// IndependentVowel + D/V/N/I/C/J/X: close syllable
sl@0: 	EIndependentVowel = 5,
sl@0: 	// Virama + C: add and move to Consonant
sl@0: 	// Virama + J: add and close syllable
sl@0: 	// Virama + N/V/D/I/S/X: close syllable
sl@0: 	EVirama = 6,
sl@0: 	// Virama2 + C: add and move to Consonant3
sl@0: 	// Virama2 + J: add and close syllable
sl@0: 	// Virama2 + N/V/D/I/S/X: close syllable
sl@0: 	EVirama2 = 7,
sl@0: 	// Virama3 + C: add and move to Consonant4
sl@0: 	// Virama3 + J: add and close syllable
sl@0: 	// Virama3 + N/V/D/I/S/X: close syllable
sl@0: 	EVirama3 = 8,
sl@0: 	// Virama4 + J: add and close syllable
sl@0: 	// Virama4 + CN/V/D/I/S/X: close syllable
sl@0: 	EVirama4 = 9,
sl@0: 	// ConsonantVowel + S: add
sl@0: 	// ConsonantVowel + D/V/N/I/C/J/X: close syllable
sl@0: 	EConsonantVowel = 10,
sl@0: 	// NuktaConsonant + D/V: add
sl@0: 	// NuktaConsonant + S/N/I/C/J/X: close syllable
sl@0: 	ENuktaConsonant = 11,
sl@0: 	// NuktaConsonant + D/V: add
sl@0: 	// NuktaConsonant + S/N/I/C/J/X: close syllable
sl@0: 	ENuktaConsonant2 = 12,
sl@0: 	// NuktaConsonant + D/V: add
sl@0: 	// NuktaConsonant + S/N/I/C/J/X: close syllable
sl@0: 	ENuktaConsonant3 = 13,
sl@0: 	// NuktaConsonant + D: add
sl@0: 	// NuktaConsonant + V/S/N/I/C/J/X: close syllable
sl@0: 	ENuktaConsonant4 = 14,
sl@0: 	// IndependentVowelA + CANDRA E: add
sl@0: 	// IndependentVowelA + anything else: close syllable
sl@0: 	EIndependentVowelA = 15,
sl@0: 	// ZeroWidthJoinerC + V: add
sl@0: 	// ZeroWidthJoinerC + C/S/N/I/J/X/D: close syllable
sl@0: 	EZeroWidthJoinerC = 16,
sl@0: 	// ZeroWidthJoinerA + CANDRA E: add
sl@0: 	// ZeroWidthJoinerA +anything else: close syllable
sl@0: 	EZeroWidthJoinerA = 17,
sl@0: 	// ZeroWidthJoinerV + C/N: add
sl@0: 	// ZeroWidthJoinerV + anything else: close syllable
sl@0: 	EZeroWidthJoinerV = 18,
sl@0: 	// ZeroWidthJoinerV2 + C/N: add
sl@0: 	// ZeroWidthJoinerV2 + anything else: close syllable
sl@0: 	EZeroWidthJoinerV2 = 19,
sl@0: 	// ZeroWidthJoinerV3 + C/N: add
sl@0: 	// ZeroWidthJoinerV3 + anything else: close syllable
sl@0: 	EZeroWidthJoinerV3 =20,
sl@0: 	// EKannadaRa + C/N/V/ZWJ(C): add
sl@0: 	EKannadaRa = 21,
sl@0: 	// ESplitVowel1 + SV2: add and close syllable
sl@0: 	// ESPlitVowel1 + anything else: close syllable
sl@0: 	ESplitVowel1 = 22,
sl@0: 	//EGurBearerA + EIndicCodeGurDependentVowelA: add and move to EIndependentVowel
sl@0: 	//EGurBearerA + modifier: add and close syllable
sl@0: 	//EGurBearerA + anything else: close syllable
sl@0: 	EGurBearerA = 23,
sl@0: 	//EGurBearerU + EIndicCodeGurDependentVowelU: add and move to EIndependentVowel
sl@0: 	//EGurBearerU + anything else: close syllable
sl@0: 	EGurBearerU = 24,
sl@0: 	//EGurBearerI + EIndicCodeGurDependentVowelI: add and move to EIndependentVowel
sl@0: 	//EGurBearerI + anything else: close syllable	
sl@0: 	EGurBearerI = 25,
sl@0: 	
sl@0: 	EConsonantMalaChillu = 26,
sl@0: 	EConsonantMalaChillu2 = 27,
sl@0: 	EConsonantMalaChillu3 = 28,
sl@0: 	EViramaMalaChillu = 29,
sl@0: 	EViramaMalaChillu2 = 30,
sl@0: 	EViramaMalaChillu3 = 31,
sl@0: 	EConsonantMalaChilluNA = 32,
sl@0: 	EConsonantMalaChilluNA2 = 33,
sl@0: 	EConsonantMalaChilluNA3 = 34,
sl@0: 	EViramaMalaChilluNA = 35,
sl@0: 	EViramaMalaChilluNA2 = 36,
sl@0: 	EViramaMalaChilluNA3 = 37,
sl@0: 	EZeroWidthJoinerMalaChilluNA = 38,
sl@0: 	EZeroWidthJoinerMalaChilluNA2 = 39,
sl@0: 	EZeroWidthJoinerMalaChilluNA3 = 40,
sl@0: 	// Add and close acceptances go here.
sl@0: 	EAccept = 41
sl@0: 	};
sl@0: 
sl@0: /** Defines the transitions for a state machine for determining syllable
sl@0: boundaries. The machine starts in state 0. On receiving a character of type t
sl@0: while in state s, moves to state KStateResponse[s][t]. */
sl@0: const TSyllableState KStateResponse[42][24] =
sl@0: 	{
sl@0: 	// EBegin -- nothing added yet
sl@0: 	{EAccept, EAccept, EIndependentVowel, EConsonant, EAccept, EAccept, EAccept, EAccept, ENuktaConsonant, EIndependentVowelA, EAccept, EKannadaRa, EAccept, EAccept, EAccept, EGurBearerA, EGurBearerU, EGurBearerI, EAccept, EAccept, EAccept, EConsonantMalaChillu,EConsonantMalaChilluNA,EConsonant},
sl@0: 	// EConsonant -- seen a consonant either at the start or after virama
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, ENuktaConsonant, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EConsonant2 -- seen a consonant after virama
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama2, ENuktaConsonant2, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EConsonant3 -- seen a consonant after virama2 
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama3, ENuktaConsonant3, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EConsonant4 -- seen a consonant after virama3
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama4, ENuktaConsonant4, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EIndependentVowel -- possibly nasalized. I haven't bothered to distinguish between
sl@0: 	// nasalization and visarga.
sl@0: 	{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EVirama -- just seen a virama in a legal context. Must be consonant or ZWJ next
sl@0: 	{EReject, EReject, EReject, EConsonant2, EReject, EReject, EReject, EZeroWidthJoinerV, ENuktaConsonant2, EReject, EReject, EConsonant2, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
sl@0: 	// EVirama2 -- just seen a virama in a legal context. Must be consonant2
sl@0: 	{EReject, EReject, EReject, EConsonant3, EReject, EReject, EReject, EZeroWidthJoinerV2, ENuktaConsonant3, EReject, EReject, EConsonant3, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
sl@0: 	// EVirama3 -- just seen a virama in a legal context. Must be consonant3
sl@0: 	{EReject, EReject, EReject, EConsonant4, EReject, EReject, EReject, EZeroWidthJoinerV3, ENuktaConsonant4, EReject, EReject, EConsonant4, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonant4,EConsonant4,EConsonant4},
sl@0: 	// EVirama4 -- just seen a virama in a legal context. Must be consonant4
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EConsonantVowel -- Just seen a consonant with matra. Can only nasalize or visarg
sl@0: 	{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// ENuktaConsonant -- Just seen a consonant with Nukta. Can only accept a dependant vowel or a Virama at this stage.
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// ENuktaConsonant2 -- Just seen a consonant with Nukta after a virama.
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama2, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// ENuktaConsonant3 -- Just seen a consonant with Nukta after Virama2.
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama3, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// ENuktaConsonant4 -- Just seen a consonant with Nukta after Virama3.
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama4, EReject, EReject, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EIndependentVowelA -- Special case Devanagari independent vowel
sl@0: 	{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EZeroWidthJoinerA, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// EZeroWidthJoinerC -- Just seen a ZWJ after a consonant
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EVirama, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EZeroWidthJoinerA -- Just seen a ZWJ after the dependent Vowel A
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EZeroWidthJoinerV -- Just seen the ZWJ after the first pair of consonant + virama
sl@0: 	{EReject, EAccept, EReject, EConsonant2, EReject, EReject, EReject, EReject, ENuktaConsonant2, EReject, EReject, EConsonant2, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
sl@0: 	// EZeroWidthJoinerV2 -- Just seen the ZWJ after consonant + virama + consonant + virama
sl@0: 	{EReject, EAccept, EReject, EConsonant3, EReject, EReject, EReject, EReject, ENuktaConsonant3, EReject, EReject, EConsonant3, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
sl@0: 	// EZeroWidthJoinerV3 -- Just seen the ZWJ after consonant + virama + consonant + virama + consonant + virama
sl@0: 	{EReject, EAccept, EReject, EConsonant4, EReject, EReject, EReject, EReject, ENuktaConsonant4, EReject, EReject, EConsonant4, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonant4,EConsonant4,EConsonant4},
sl@0: 	// EKannadaRa -- Special case consonant
sl@0: 	{EReject, EAccept, EReject, EReject, EConsonantVowel, EVirama, ENuktaConsonant, EZeroWidthJoinerC, EReject, EReject, EConsonantVowel, EReject, ESplitVowel1, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EConsonantVowel, EReject,EReject,EReject},
sl@0: 	// ESplitVowel1 -- Just seen a consonant with first part of a split vowel. Can only nasalize, visarg or add second part of splt vowel
sl@0: 	{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EConsonantVowel, EConsonantVowel, EReject, EReject, EReject, EReject, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EGurBearerA -- Just seen a dependent Vowel EIndicCodeGurDependentVowelA and modifier
sl@0: 	{EReject, EAccept, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject, EReject, EReject,EReject,EReject},
sl@0: 	// EGurBearerU -- Just seen a dependent Vowel EIndicCodeGurDependentVowelU
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject, EReject,EReject,EReject},
sl@0: 	// EGurBearerI -- Just seen a dependent Vowel EIndicCodeGurDependentVowelI
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EIndependentVowel, EReject,EReject,EReject},
sl@0: 	
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu2,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChillu3,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EReject,EReject,EConsonant2,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
sl@0: 	{EReject,EReject,EReject,EConsonant3,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
sl@0: 	{EReject,EReject,EReject,EConsonant4,EReject,EReject,EReject,EAccept,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4,EConsonant4,EConsonant4},
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA2,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EAccept,EReject,EReject,EConsonantVowel,EViramaMalaChilluNA3,EReject,EReject,EReject,EReject,EReject,EReject,ESplitVowel1,EConsonantVowel,EConsonantVowel,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject},
sl@0: 	{EReject,EReject,EReject,EConsonant2,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu2,EConsonantMalaChilluNA2,EConsonant2},
sl@0: 	{EReject,EReject,EReject,EConsonant3,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA2,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonantMalaChillu3,EConsonantMalaChilluNA3,EConsonant3},
sl@0: 	{EReject,EReject,EReject,EConsonant4,EReject,EReject,EReject,EZeroWidthJoinerMalaChilluNA3,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4,EConsonant4,EConsonant4},
sl@0: 	{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant2},
sl@0: 	{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant3},
sl@0: 	{EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EReject,EConsonant4},
sl@0: 	
sl@0: 	// EAccept -- this one is added but anything further is rejected
sl@0: 	{EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject, EReject}
sl@0: 	};
sl@0: 
sl@0: TIndicCodeType CodeType(TInt aCode, const TIndicCodeMapping aCodeMap[], TInt aMapLen)
sl@0: 	{
sl@0: 	TInt start = 0;
sl@0: 	TInt end = aMapLen - 1;
sl@0: 	while (start != end)
sl@0: 		{
sl@0: 		const TInt mid = (start + end + 1) >> 1;
sl@0: 		if (aCodeMap[mid].iFirstCodeInRange <= aCode)
sl@0: 			start = mid;
sl@0: 		else
sl@0: 			end = mid - 1;
sl@0: 		}
sl@0: 	return static_cast<TIndicCodeType>(aCodeMap[start].iCodeType);
sl@0: 	}
sl@0: 
sl@0: const TText16* SyllableEnd(const TText16* aCurrentPosition,
sl@0: 	const TText16* aEnd, const TIndicCodeMapping aCodeMap[], TInt aMapLen)
sl@0: 	{
sl@0: 	TSyllableState state = EBegin;
sl@0: 	while (aCurrentPosition != aEnd)
sl@0: 		{
sl@0: 		const TIndicCodeType ct = CodeType(*aCurrentPosition, aCodeMap, aMapLen);
sl@0: 		state = KStateResponse[state][ct];
sl@0: 		if (state == EReject)
sl@0: 			return aCurrentPosition;
sl@0: 		++aCurrentPosition;
sl@0: 		}
sl@0: 	return aCurrentPosition;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Common function for all Indic scripts. 
sl@0: Performs the shaping operation on Indic script text up to KMaxTextToShape.
sl@0: */	
sl@0: TInt IndicShapingProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo, 
sl@0: 						const TIndicCodeMapping aCodeMap[], TInt aMapLen, const TUint aHighChar, 
sl@0: 						const TUint aLowChar, const TUint32 aScript, const TUint32 aLang)
sl@0: 	{
sl@0: 	const TText16* startCharacter = aGss.iParam.iText.Ptr();
sl@0: 	const TText16* endCharacter = startCharacter + aGss.iParam.iText.Length();
sl@0: 	const TText16* currentCharacter = aGss.iText.CurrentPosition();
sl@0: 	TInt currentPosition = currentCharacter - startCharacter;
sl@0: 
sl@0: 	// Do some new shaping
sl@0: 	
sl@0: 	// First close the existing RShapeInfo
sl@0: 	if(aShapeInfo.IsOpen())
sl@0: 		aShapeInfo.Close();
sl@0: 	
sl@0: 	// Find the end of Indic text whilst limiting the amount of text to be shaped to 
sl@0: 	// KMaxTextToShape. When finding the end of end position of the text to be shaped,
sl@0: 	// include numerals, punctuations and other control characters.
sl@0: 	const TText16* endIndic = currentCharacter;
sl@0: 	TChar endIndicChar = *endIndic;
sl@0: 	while((endIndic <= endCharacter || endIndic - currentCharacter <= KMaxTextToShape) &&
sl@0: 		 ((*endIndic >= aLowChar && *endIndic <= aHighChar) || 
sl@0: 		 	((endIndicChar.IsDigit() || endIndicChar.IsPunctuation()) && !QuoteOrBracketPair(*endIndic))))
sl@0: 		{
sl@0: 		if (endIndic == endCharacter || endIndic - currentCharacter > KMaxTextToShape)
sl@0: 			break;
sl@0: 		endIndic = SyllableEnd(endIndic, endCharacter, aCodeMap, aMapLen);	
sl@0: 		endIndicChar = *endIndic;
sl@0: 		}
sl@0: 	
sl@0: 	TInt endPosForShaping = endIndic - startCharacter;
sl@0: 	
sl@0: 	//Now shape from current position to the end of Hindi
sl@0: 	return aShapeInfo.Open(aGss.iFont, aGss.iParam.iText,
sl@0: 						currentPosition, endPosForShaping, aScript, aLang);
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Common function for all Indic scripts. Adds the shaped glyphs to the glyph cluster.
sl@0: This function is called regardless of whether shaping was done or skipped in this 
sl@0: iteration of the Default Process
sl@0: */
sl@0: TBool IndicPostShapingProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo, 
sl@0: 							TInt aCurrPos, TInt aSyllEndPos, const TText16* aSyllableEnd)
sl@0: 	{
sl@0: 	// Now get all the shaped values
sl@0: 	// Get the number of glyphs, glyphs, positions and indices after shaping.
sl@0: 	TInt numGlyphs = aShapeInfo.GlyphCount();
sl@0: 	const TInt32* glyph = aShapeInfo.Glyphs();
sl@0: 	const RShapeInfo::TPoint16* position = aShapeInfo.GlyphPositions();
sl@0: 	const TInt16* indices = aShapeInfo.Indices();
sl@0: 	TPoint origin;
sl@0: 	
sl@0: 	// Shift the indices and positions until the current poisition is reached. This done so that the 
sl@0: 	// origin can be set back to the original co-ordinates at the start of this Hindi text
sl@0: 	while (*indices < aCurrPos)
sl@0: 		{
sl@0: 		position++;
sl@0: 		indices++;
sl@0: 		}
sl@0: 	// Set the origin back by subtracting the current position co-ordinates from the current pen position	
sl@0: 	origin.iX = aGss.iParam.iPen.iX - position->iX;
sl@0: 	origin.iY = aGss.iParam.iPen.iY - position->iY;
sl@0: 	
sl@0: 	// No re-initialise the indices and positions to start appending the glyphs to clusters from the beginning
sl@0: 	indices = aShapeInfo.Indices();
sl@0: 	position = aShapeInfo.GlyphPositions();
sl@0: 	
sl@0: 	// Now do some post shaping syllable chopping
sl@0: 	for (TInt i = 0; i < numGlyphs; i++, glyph++, position++, indices++)
sl@0: 		{
sl@0: 		if(*indices >= aSyllEndPos)
sl@0: 			break;
sl@0: 		if(*indices >= aCurrPos && *indices < aSyllEndPos)
sl@0: 			{
sl@0: 			aGss.iParam.iPen.iX = origin.iX + position->iX;
sl@0: 			aGss.iParam.iPen.iY = origin.iY + position->iY;
sl@0: 			
sl@0: 			//Just skip the non-existing glyph and continue handling other glyphs if AppendGlyphToCluster return false.
sl@0: 			// The "continue" statement is for avoiding the potential risk of handling the non-existing glyph.
sl@0: 			if (!aGss.AppendGlyphToCluster(0x80000000UL | *glyph))
sl@0: 				continue;
sl@0: 			}
sl@0: 		}
sl@0: 	
sl@0: 	// We'll do pen advance ourselves, thanks.
sl@0: 	aGss.iPen = TGlyphSelectionState::EPenAdvance_No;
sl@0: 	aGss.iParam.iPen.iX = origin.iX + position->iX;
sl@0: 	aGss.iParam.iPen.iY = origin.iY + position->iY;
sl@0: 	aGss.iClusterState = TGlyphSelectionState::EGClusterComplete;
sl@0: 	aGss.iText.SetCurrentPosition(aSyllableEnd);
sl@0: 	return ETrue;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Common function for all Indic scripts.
sl@0: Performs shaping and Rasterizing operation on Indic script text 
sl@0: */
sl@0: TBool DoProcess(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo, const TIndicScriptProcessorParameters& aScriptSpecificParameters){
sl@0: 	const TText16* startCharacter = aGss.iParam.iText.Ptr();
sl@0: 	const TText16* endCharacter = startCharacter + aGss.iParam.iText.Length();
sl@0: 	const TText16* currentCharacter = aGss.iText.CurrentPosition();
sl@0: 	TInt currentPosition = currentCharacter - startCharacter;
sl@0: 		
sl@0: 	// Get the logical end of the syllable from the input text. We will use this later to chop
sl@0: 	// syllables from the glyph values we get.
sl@0: 	const TText16* syllableEnd = SyllableEnd(currentCharacter, endCharacter, aScriptSpecificParameters.iCodeMap,
sl@0: 			aScriptSpecificParameters.iMapLen);
sl@0: 	TInt syllableEndPos = syllableEnd - startCharacter;
sl@0: 			
sl@0: 	TInt ret = KErrNone;
sl@0: 	if(currentPosition >= aShapeInfo.EndOfShapedText())	
sl@0: 		ret = IndicShapingProcess(aGss, aShapeInfo, aScriptSpecificParameters.iCodeMap, aScriptSpecificParameters.iMapLen, 
sl@0: 				aScriptSpecificParameters.iUCHigh, aScriptSpecificParameters.iUCLow, aScriptSpecificParameters.iScriptCode, aScriptSpecificParameters.iLanguageCode);
sl@0: 		
sl@0: 	// If an RShapeInfo could not be opened, call the default process
sl@0: 	if (ret != KErrNone)
sl@0: 		return GlyphSelector_Default::Process(aGss, aShapeInfo);	
sl@0: 	
sl@0: 	// Now call the post shaping process to add glyphs to the glyph cluster
sl@0: 	return IndicPostShapingProcess(aGss, aShapeInfo, currentPosition, syllableEndPos, syllableEnd);
sl@0: }
sl@0: 
sl@0: /*************************************************** D E V A N A G A R I ***************************************************/
sl@0: TBool GlyphSelector_Devanagari::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicDevParameters);
sl@0: 	}
sl@0: 	
sl@0: /***************************************************** K A N N A D A ******************************************************/
sl@0: TBool GlyphSelector_Kannada::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicKanParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** G U J A R A T I ******************************************************/
sl@0: TBool GlyphSelector_Gujarati::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicGujParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** B E N G A L I ******************************************************/
sl@0: TBool GlyphSelector_Bengali::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicBenParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** T A M I L ******************************************************/
sl@0: TBool GlyphSelector_Tamil::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicTamParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** T E L U G U ******************************************************/
sl@0: TBool GlyphSelector_Telugu::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicTelParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** G U R M U K H I ******************************************************/
sl@0: TBool GlyphSelector_Gurmukhi::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)\
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicGurParameters);
sl@0: 	}
sl@0: 
sl@0: /***************************************************** M A L A Y A L A M ******************************************************/
sl@0: TBool GlyphSelector_Malayalam::Process(TGlyphSelectionState& aGss, RShapeInfo& aShapeInfo)
sl@0: 	{
sl@0: 	return DoProcess(aGss, aShapeInfo, KIndicMalParameters);
sl@0: 	}
sl@0: