Mercurial > hg > openjdk > jigsaw > jdk
view src/share/native/sun/font/layout/ContextualGlyphSubstProc2.cpp @ 7316:43f2d3d715c5
8004986: Better handling of glyph table
8004987: Improve font layout
8004994: Improve checking of glyph table
Reviewed-by: srl, jgodinez
author | prr |
---|---|
date | Tue, 26 Feb 2013 10:07:26 -0800 |
parents | 4267ae18e13a |
children | 32778f4f945f |
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/* * 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 "ContextualGlyphSubstProc2.h" #include "LEGlyphStorage.h" #include "LESwaps.h" U_NAMESPACE_BEGIN UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor2) ContextualGlyphSubstitutionProcessor2::ContextualGlyphSubstitutionProcessor2(const MorphSubtableHeader2 *morphSubtableHeader) : StateTableProcessor2(morphSubtableHeader) { contextualGlyphHeader = (const ContextualGlyphHeader2 *) morphSubtableHeader; le_uint32 perGlyphTableOffset = SWAPL(contextualGlyphHeader->perGlyphTableOffset); perGlyphTable = ((le_uint32 *) ((char *)&stateTableHeader->stHeader + perGlyphTableOffset)); entryTable = (const ContextualGlyphStateEntry2 *) ((char *) &stateTableHeader->stHeader + entryTableOffset); } ContextualGlyphSubstitutionProcessor2::~ContextualGlyphSubstitutionProcessor2() { } void ContextualGlyphSubstitutionProcessor2::beginStateTable() { markGlyph = 0; } le_uint16 ContextualGlyphSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index) { const ContextualGlyphStateEntry2 *entry = &entryTable[index]; le_uint16 newState = SWAPW(entry->newStateIndex); le_uint16 flags = SWAPW(entry->flags); le_int16 markIndex = SWAPW(entry->markIndex); le_int16 currIndex = SWAPW(entry->currIndex); if (markIndex != -1) { le_uint32 offset = SWAPL(perGlyphTable[markIndex]); LEGlyphID mGlyph = glyphStorage[markGlyph]; TTGlyphID newGlyph = lookup(offset, mGlyph); glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph); } if (currIndex != -1) { le_uint32 offset = SWAPL(perGlyphTable[currIndex]); LEGlyphID thisGlyph = glyphStorage[currGlyph]; TTGlyphID newGlyph = lookup(offset, thisGlyph); glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph); } if (flags & cgsSetMark) { markGlyph = currGlyph; } if (!(flags & cgsDontAdvance)) { currGlyph += dir; } return newState; } TTGlyphID ContextualGlyphSubstitutionProcessor2::lookup(le_uint32 offset, LEGlyphID gid) { LookupTable *lookupTable = ((LookupTable *) ((char *)perGlyphTable + offset)); le_int16 format = SWAPW(lookupTable->format); TTGlyphID newGlyph = 0xFFFF; switch (format) { case ltfSimpleArray: { #ifdef TEST_FORMAT // Disabled pending for design review SimpleArrayLookupTable *lookupTable0 = (SimpleArrayLookupTable *) lookupTable; TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); newGlyph = SWAPW(lookupTable0->valueArray[glyphCode]); #endif break; } case ltfSegmentSingle: { #ifdef TEST_FORMAT // Disabled pending for design review SegmentSingleLookupTable *lookupTable2 = (SegmentSingleLookupTable *) lookupTable; const LookupSegment *segment = lookupTable2->lookupSegment(lookupTable2->segments, gid); if (segment != NULL) { newGlyph = SWAPW(segment->value); } #endif break; } case ltfSegmentArray: { //printf("Context Lookup Table Format4: specific interpretation needed!\n"); break; } case ltfSingleTable: { #ifdef TEST_FORMAT // Disabled pending for design review SingleTableLookupTable *lookupTable6 = (SingleTableLookupTable *) lookupTable; const LookupSingle *segment = lookupTable6->lookupSingle(lookupTable6->entries, gid); if (segment != NULL) { newGlyph = SWAPW(segment->value); } #endif break; } case ltfTrimmedArray: { TrimmedArrayLookupTable *lookupTable8 = (TrimmedArrayLookupTable *) lookupTable; TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph); TTGlyphID lastGlyph = firstGlyph + SWAPW(lookupTable8->glyphCount); TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid); if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) { newGlyph = SWAPW(lookupTable8->valueArray[glyphCode - firstGlyph]); } } default: break; } return newGlyph; } void ContextualGlyphSubstitutionProcessor2::endStateTable() { } U_NAMESPACE_END