author | chegar |
Sun, 17 Aug 2014 15:54:13 +0100 | |
changeset 25859 | 3317bb8137f4 |
parent 23909 | jdk/src/share/native/sun/font/layout/LigatureSubstProc2.cpp@1ba74cd2a357 |
child 29911 | b2a9675e2e21 |
permissions | -rw-r--r-- |
16889 | 1 |
/* |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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/* |
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* |
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* (C) Copyright IBM Corp and Others. 1998-2013 - All Rights Reserved |
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* |
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*/ |
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#include "LETypes.h" |
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#include "MorphTables.h" |
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#include "StateTables.h" |
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#include "MorphStateTables.h" |
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#include "SubtableProcessor2.h" |
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#include "StateTableProcessor2.h" |
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#include "LigatureSubstProc2.h" |
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#include "LEGlyphStorage.h" |
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#include "LESwaps.h" |
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U_NAMESPACE_BEGIN |
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#define ExtendedComplement(m) ((le_int32) (~((le_uint32) (m)))) |
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#define SignBit(m) ((ExtendedComplement(m) >> 1) & (le_int32)(m)) |
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#define SignExtend(v,m) (((v) & SignBit(m))? ((v) | ExtendedComplement(m)): (v)) |
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(LigatureSubstitutionProcessor2) |
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LigatureSubstitutionProcessor2::LigatureSubstitutionProcessor2(const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success) |
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: StateTableProcessor2(morphSubtableHeader, success), |
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ligActionOffset(0), |
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ligatureSubstitutionHeader(morphSubtableHeader, success), componentOffset(0), ligatureOffset(0), entryTable() |
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{ |
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if (LE_FAILURE(success)) return; |
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ligActionOffset = SWAPL(ligatureSubstitutionHeader->ligActionOffset); |
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componentOffset = SWAPL(ligatureSubstitutionHeader->componentOffset); |
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ligatureOffset = SWAPL(ligatureSubstitutionHeader->ligatureOffset); |
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entryTable = LEReferenceToArrayOf<LigatureSubstitutionStateEntry2>(stHeader, success, entryTableOffset, LE_UNBOUNDED_ARRAY); |
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} |
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LigatureSubstitutionProcessor2::~LigatureSubstitutionProcessor2() |
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{ |
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} |
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void LigatureSubstitutionProcessor2::beginStateTable() |
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{ |
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m = -1; |
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} |
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le_uint16 LigatureSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index, LEErrorCode &success) |
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{ |
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const LigatureSubstitutionStateEntry2 *entry = entryTable.getAlias(index, success); |
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if(LE_FAILURE(success)) return 0; |
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le_uint16 nextStateIndex = SWAPW(entry->nextStateIndex); |
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le_uint16 flags = SWAPW(entry->entryFlags); |
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le_uint16 ligActionIndex = SWAPW(entry->ligActionIndex); |
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if (flags & lsfSetComponent) { |
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if (++m >= nComponents) { |
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m = 0; |
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} |
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componentStack[m] = currGlyph; |
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} else if ( m == -1) { |
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// bad font- skip this glyph. |
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//LE_DEBUG_BAD_FONT("m==-1 (componentCount went negative)") |
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currGlyph+= dir; |
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return nextStateIndex; |
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} |
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ByteOffset actionOffset = flags & lsfPerformAction; |
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if (actionOffset != 0) { |
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LEReferenceTo<LigatureActionEntry> ap(stHeader, success, ligActionOffset); // byte offset |
23909
1ba74cd2a357
8031462: Fonts with morx tables are broken with latest ICU fixes
prr
parents:
22330
diff
changeset
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ap.addObject(ligActionIndex, success); |
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LEReferenceToArrayOf<TTGlyphID> ligatureTable(stHeader, success, ligatureOffset, LE_UNBOUNDED_ARRAY); |
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LigatureActionEntry action; |
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le_int32 offset, i = 0; |
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le_int32 stack[nComponents]; |
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le_int16 mm = -1; |
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LEReferenceToArrayOf<le_uint16> componentTable(stHeader, success, componentOffset, LE_UNBOUNDED_ARRAY); |
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if(LE_FAILURE(success)) { |
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currGlyph+= dir; |
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return nextStateIndex; // get out! bad font |
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} |
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do { |
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le_uint32 componentGlyph = componentStack[m--]; // pop off |
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action = SWAPL(*ap.getAlias()); |
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if (m < 0) { |
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m = nComponents - 1; |
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} |
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offset = action & lafComponentOffsetMask; |
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if (offset != 0) { |
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if(componentGlyph > glyphStorage.getGlyphCount()) { |
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LE_DEBUG_BAD_FONT("preposterous componentGlyph"); |
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currGlyph+= dir; |
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return nextStateIndex; // get out! bad font |
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} |
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i += SWAPW(componentTable(LE_GET_GLYPH(glyphStorage[componentGlyph]) + (SignExtend(offset, lafComponentOffsetMask)),success)); |
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if (action & (lafLast | lafStore)) { |
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TTGlyphID ligatureGlyph = SWAPW(ligatureTable(i,success)); |
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glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], ligatureGlyph); |
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if(mm==nComponents) { |
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LE_DEBUG_BAD_FONT("exceeded nComponents"); |
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mm--; // don't overrun the stack. |
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} |
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stack[++mm] = componentGlyph; |
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i = 0; |
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} else { |
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glyphStorage[componentGlyph] = LE_SET_GLYPH(glyphStorage[componentGlyph], 0xFFFF); |
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} |
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} |
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#if LE_ASSERT_BAD_FONT |
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if(m<0) { |
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LE_DEBUG_BAD_FONT("m<0") |
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} |
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#endif |
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23909
1ba74cd2a357
8031462: Fonts with morx tables are broken with latest ICU fixes
prr
parents:
22330
diff
changeset
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ap.addObject(success); |
1ba74cd2a357
8031462: Fonts with morx tables are broken with latest ICU fixes
prr
parents:
22330
diff
changeset
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} while (LE_SUCCESS(success) && !(action & lafLast) && (m>=0) ); // stop if last bit is set, or if run out of items |
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while (mm >= 0) { |
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if (++m >= nComponents) { |
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m = 0; |
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} |
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componentStack[m] = stack[mm--]; |
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} |
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} |
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if (!(flags & lsfDontAdvance)) { |
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currGlyph += dir; |
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} |
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return nextStateIndex; |
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} |
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void LigatureSubstitutionProcessor2::endStateTable() |
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{ |
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} |
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U_NAMESPACE_END |