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