X-Git-Url: https://git.saurik.com/apple/icu.git/blobdiff_plain/249c4c5ea9376c24572daf9c2effa7484a282f14..3d1f044b704633e2e541231cd17ae9ecf9ad5c7a:/icuSources/layout/HangulLayoutEngine.cpp diff --git a/icuSources/layout/HangulLayoutEngine.cpp b/icuSources/layout/HangulLayoutEngine.cpp deleted file mode 100644 index f1728e3d..00000000 --- a/icuSources/layout/HangulLayoutEngine.cpp +++ /dev/null @@ -1,338 +0,0 @@ -/* - * HangulLayoutEngine.cpp: OpenType processing for Han fonts. - * - * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved. - */ - -#include "LETypes.h" -#include "LEScripts.h" -#include "LELanguages.h" - -#include "LayoutEngine.h" -#include "OpenTypeLayoutEngine.h" -#include "HangulLayoutEngine.h" -#include "ScriptAndLanguageTags.h" -#include "LEGlyphStorage.h" -#include "OpenTypeTables.h" - -U_NAMESPACE_BEGIN - -UOBJECT_DEFINE_RTTI_IMPLEMENTATION(HangulOpenTypeLayoutEngine) - - -#define FEATURE_MAP(name) {name ## FeatureTag, name ## FeatureMask} - -#define LJMO_FIRST 0x1100 -#define LJMO_LAST 0x1159 -#define LJMO_FILL 0x115F -#define LJMO_COUNT 19 - -#define VJMO_FIRST 0x1161 -#define VJMO_LAST 0x11A2 -#define VJMO_FILL 0x1160 -#define VJMO_COUNT 21 - -#define TJMO_FIRST 0x11A7 -#define TJMO_LAST 0x11F9 -#define TJMO_COUNT 28 - -#define HSYL_FIRST 0xAC00 -#define HSYL_COUNT 11172 -#define HSYL_LVCNT (VJMO_COUNT * TJMO_COUNT) - -// Character classes -enum -{ - CC_L = 0, - CC_V, - CC_T, - CC_LV, - CC_LVT, - CC_X, - CC_COUNT -}; - -// Action flags -#define AF_L 1 -#define AF_V 2 -#define AF_T 4 - -// Actions -#define a_N 0 -#define a_L (AF_L) -#define a_V (AF_V) -#define a_T (AF_T) -#define a_VT (AF_V | AF_T) -#define a_LV (AF_L | AF_V) -#define a_LVT (AF_L | AF_V | AF_T) - -typedef struct -{ - int32_t newState; - int32_t actionFlags; -} StateTransition; - -static const StateTransition stateTable[][CC_COUNT] = -{ -// L V T LV LVT X - { {1, a_L}, {2, a_LV}, {3, a_LVT}, {2, a_LV}, {3, a_LVT}, {4, a_T}}, // 0 - start - { {1, a_L}, {2, a_V}, {3, a_VT}, {2, a_LV}, {3, a_LVT}, {-1, a_V}}, // 1 - L+ - {{-1, a_N}, {2, a_V}, {3, a_T}, {-1, a_N}, {-1, a_N}, {-1, a_N}}, // 2 - L+V+ - {{-1, a_N}, {-1, a_N}, {3, a_T}, {-1, a_N}, {-1, a_N}, {-1, a_N}}, // 3 - L+V+T* - {{-1, a_N}, {-1, a_N}, {-1, a_N}, {-1, a_N}, {-1, a_N}, {4, a_T}} // 4 - X+ -}; - - -#define ccmpFeatureTag LE_CCMP_FEATURE_TAG -#define ljmoFeatureTag LE_LJMO_FEATURE_TAG -#define vjmoFeatureTag LE_VJMO_FEATURE_TAG -#define tjmoFeatureTag LE_TJMO_FEATURE_TAG - -#define ccmpFeatureMask 0x80000000UL -#define ljmoFeatureMask 0x40000000UL -#define vjmoFeatureMask 0x20000000UL -#define tjmoFeatureMask 0x10000000UL - -static const FeatureMap featureMap[] = -{ - {ccmpFeatureTag, ccmpFeatureMask}, - {ljmoFeatureTag, ljmoFeatureMask}, - {vjmoFeatureTag, vjmoFeatureMask}, - {tjmoFeatureTag, tjmoFeatureMask} -}; - -static const le_int32 featureMapCount = LE_ARRAY_SIZE(featureMap); - -#define nullFeatures 0 -#define ljmoFeatures (ccmpFeatureMask | ljmoFeatureMask) -#define vjmoFeatures (ccmpFeatureMask | vjmoFeatureMask | ljmoFeatureMask | tjmoFeatureMask) -#define tjmoFeatures (ccmpFeatureMask | tjmoFeatureMask | ljmoFeatureMask | vjmoFeatureMask) - -static le_int32 compose(LEUnicode lead, LEUnicode vowel, LEUnicode trail, LEUnicode &syllable) -{ - le_int32 lIndex = lead - LJMO_FIRST; - le_int32 vIndex = vowel - VJMO_FIRST; - le_int32 tIndex = trail - TJMO_FIRST; - le_int32 result = 3; - - if ((lIndex < 0 || lIndex >= LJMO_COUNT ) || (vIndex < 0 || vIndex >= VJMO_COUNT)) { - return 0; - } - - if (tIndex <= 0 || tIndex >= TJMO_COUNT) { - tIndex = 0; - result = 2; - } - - syllable = (LEUnicode) ((lIndex * VJMO_COUNT + vIndex) * TJMO_COUNT + tIndex + HSYL_FIRST); - - return result; -} - -static le_int32 decompose(LEUnicode syllable, LEUnicode &lead, LEUnicode &vowel, LEUnicode &trail) -{ - le_int32 sIndex = syllable - HSYL_FIRST; - - if (sIndex < 0 || sIndex >= HSYL_COUNT) { - return 0; - } - - lead = LJMO_FIRST + (sIndex / HSYL_LVCNT); - vowel = VJMO_FIRST + (sIndex % HSYL_LVCNT) / TJMO_COUNT; - trail = TJMO_FIRST + (sIndex % TJMO_COUNT); - - if (trail == TJMO_FIRST) { - return 2; - } - - return 3; -} - -static le_int32 getCharClass(LEUnicode ch, LEUnicode &lead, LEUnicode &vowel, LEUnicode &trail) -{ - lead = LJMO_FILL; - vowel = VJMO_FILL; - trail = TJMO_FIRST; - - if (ch >= LJMO_FIRST && ch <= LJMO_LAST) { - lead = ch; - return CC_L; - } - - if (ch >= VJMO_FIRST && ch <= VJMO_LAST) { - vowel = ch; - return CC_V; - } - - if (ch > TJMO_FIRST && ch <= TJMO_LAST) { - trail = ch; - return CC_T; - } - - le_int32 c = decompose(ch, lead, vowel, trail); - - if (c == 2) { - return CC_LV; - } - - if (c == 3) { - return CC_LVT; - } - - trail = ch; - return CC_X; -} - -HangulOpenTypeLayoutEngine::HangulOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 /*languageCode*/, - le_int32 typoFlags, const LEReferenceTo &gsubTable, LEErrorCode &success) - : OpenTypeLayoutEngine(fontInstance, scriptCode, korLanguageCode, typoFlags, gsubTable, success) -{ - fFeatureMap = featureMap; - fFeatureMapCount = featureMapCount; - fFeatureOrder = TRUE; -} - -HangulOpenTypeLayoutEngine::HangulOpenTypeLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 /*languageCode*/, - le_int32 typoFlags, LEErrorCode &success) - : OpenTypeLayoutEngine(fontInstance, scriptCode, korLanguageCode, typoFlags, success) -{ - fFeatureMap = featureMap; - fFeatureMapCount = featureMapCount; - fFeatureOrder = TRUE; -} - -HangulOpenTypeLayoutEngine::~HangulOpenTypeLayoutEngine() -{ - // nothing to do -} - -le_int32 HangulOpenTypeLayoutEngine::characterProcessing(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, - LEUnicode *&outChars, LEGlyphStorage &glyphStorage, LEErrorCode &success) -{ - if (LE_FAILURE(success)) { - return 0; - } - - if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) { - success = LE_ILLEGAL_ARGUMENT_ERROR; - return 0; - } - - le_int32 worstCase = count * 3; - - outChars = LE_NEW_ARRAY(LEUnicode, worstCase); - - if (outChars == NULL) { - success = LE_MEMORY_ALLOCATION_ERROR; - return 0; - } - - glyphStorage.allocateGlyphArray(worstCase, rightToLeft, success); - glyphStorage.allocateAuxData(success); - - if (LE_FAILURE(success)) { - LE_DELETE_ARRAY(outChars); - return 0; - } - - le_int32 outCharCount = 0; - le_int32 limit = offset + count; - le_int32 i = offset; - - while (i < limit) { - le_int32 state = 0; - le_int32 inStart = i; - le_int32 outStart = outCharCount; - - while( i < limit) { - LEUnicode lead = 0; - LEUnicode vowel = 0; - LEUnicode trail = 0; - int32_t chClass = getCharClass(chars[i], lead, vowel, trail); - const StateTransition transition = stateTable[state][chClass]; - - if (chClass == CC_X) { - /* Any character of type X will be stored as a trail jamo */ - if ((transition.actionFlags & AF_T) != 0) { - outChars[outCharCount] = trail; - glyphStorage.setCharIndex(outCharCount, i-offset, success); - glyphStorage.setAuxData(outCharCount++, nullFeatures, success); - } - } else { - /* Any Hangul will be fully decomposed. Output the decomposed characters. */ - if ((transition.actionFlags & AF_L) != 0) { - outChars[outCharCount] = lead; - glyphStorage.setCharIndex(outCharCount, i-offset, success); - glyphStorage.setAuxData(outCharCount++, ljmoFeatures, success); - } - - if ((transition.actionFlags & AF_V) != 0) { - outChars[outCharCount] = vowel; - glyphStorage.setCharIndex(outCharCount, i-offset, success); - glyphStorage.setAuxData(outCharCount++, vjmoFeatures, success); - } - - if ((transition.actionFlags & AF_T) != 0) { - outChars[outCharCount] = trail; - glyphStorage.setCharIndex(outCharCount, i-offset, success); - glyphStorage.setAuxData(outCharCount++, tjmoFeatures, success); - } - } - - state = transition.newState; - - /* Negative next state means stop. */ - if (state < 0) { - break; - } - - i += 1; - } - - le_int32 inLength = i - inStart; - le_int32 outLength = outCharCount - outStart; - - /* - * See if the syllable can be composed into a single character. There are 5 - * possible cases: - * - * Input Decomposed to Compose to - * LV L, V LV - * LVT L, V, T LVT - * L, V L, V LV, DEL - * LV, T L, V, T LVT, DEL - * L, V, T L, V, T LVT, DEL, DEL - */ - if ((inLength >= 1 && inLength <= 3) && (outLength == 2 || outLength == 3)) { - LEUnicode syllable = 0x0000; - LEUnicode lead = outChars[outStart]; - LEUnicode vowel = outChars[outStart + 1]; - LEUnicode trail = outLength == 3? outChars[outStart + 2] : TJMO_FIRST; - - /* - * If the composition consumes the whole decomposed syllable, - * we can use it. - */ - if (compose(lead, vowel, trail, syllable) == outLength) { - outCharCount = outStart; - outChars[outCharCount] = syllable; - glyphStorage.setCharIndex(outCharCount, inStart-offset, success); - glyphStorage.setAuxData(outCharCount++, nullFeatures, success); - - /* - * Replace the rest of the input characters with DEL. - */ - for(le_int32 d = inStart + 1; d < i; d += 1) { - outChars[outCharCount] = 0xFFFF; - glyphStorage.setCharIndex(outCharCount, d - offset, success); - glyphStorage.setAuxData(outCharCount++, nullFeatures, success); - } - } - } - } - - glyphStorage.adoptGlyphCount(outCharCount); - return outCharCount; -} - -U_NAMESPACE_END