| /* |
| * 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. 1998-2004 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "OpenTypeTables.h" |
| #include "OpenTypeUtilities.h" |
| #include "CoverageTables.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| le_int32 CoverageTable::getGlyphCoverage(const LETableReference &base, LEGlyphID glyphID, LEErrorCode &success) const |
| { |
| if(LE_FAILURE(success)) return -1; |
| |
| switch(SWAPW(coverageFormat)) |
| { |
| case 0: |
| return -1; |
| |
| case 1: |
| { |
| LEReferenceTo<CoverageFormat1Table> f1Table(base, success); |
| |
| return f1Table->getGlyphCoverage(f1Table, glyphID, success); |
| } |
| |
| case 2: |
| { |
| LEReferenceTo<CoverageFormat2Table> f2Table(base, success); |
| |
| return f2Table->getGlyphCoverage(f2Table, glyphID, success); |
| } |
| |
| default: |
| return -1; |
| } |
| } |
| |
| le_int32 CoverageFormat1Table::getGlyphCoverage(LEReferenceTo<CoverageFormat1Table> &base, LEGlyphID glyphID, LEErrorCode &success) const |
| { |
| if(LE_FAILURE(success)) return -1; |
| |
| TTGlyphID ttGlyphID = (TTGlyphID) LE_GET_GLYPH(glyphID); |
| le_uint16 count = SWAPW(glyphCount); |
| le_uint8 bit = OpenTypeUtilities::highBit(count); |
| le_uint16 power = 1 << bit; |
| le_uint16 extra = count - power; |
| le_uint16 probe = power; |
| le_uint16 index = 0; |
| |
| if (count == 0) { |
| return -1; |
| } |
| |
| LEReferenceToArrayOf<TTGlyphID>(base, success, glyphArray, count); |
| if(LE_FAILURE(success)) return -1; // range checks array |
| |
| |
| if (SWAPW(glyphArray[extra]) <= ttGlyphID) { |
| index = extra; |
| } |
| |
| while (probe > (1 << 0)) { |
| probe >>= 1; |
| |
| if (SWAPW(glyphArray[index + probe]) <= ttGlyphID) { |
| index += probe; |
| } |
| } |
| |
| if (SWAPW(glyphArray[index]) == ttGlyphID) { |
| return index; |
| } |
| |
| return -1; |
| } |
| |
| le_int32 CoverageFormat2Table::getGlyphCoverage(LEReferenceTo<CoverageFormat2Table> &base, LEGlyphID glyphID, LEErrorCode &success) const |
| { |
| if(LE_FAILURE(success)) return -1; |
| |
| TTGlyphID ttGlyphID = (TTGlyphID) LE_GET_GLYPH(glyphID); |
| le_uint16 count = SWAPW(rangeCount); |
| |
| LEReferenceToArrayOf<GlyphRangeRecord> rangeRecordArrayRef(base, success, rangeRecordArray, count); |
| le_int32 rangeIndex = |
| OpenTypeUtilities::getGlyphRangeIndex(ttGlyphID, rangeRecordArrayRef, success); |
| |
| if (rangeIndex < 0 || LE_FAILURE(success)) { // could fail if array out of bounds |
| return -1; |
| } |
| |
| TTGlyphID firstInRange = SWAPW(rangeRecordArray[rangeIndex].firstGlyph); |
| le_uint16 startCoverageIndex = SWAPW(rangeRecordArray[rangeIndex].rangeValue); |
| |
| return startCoverageIndex + (ttGlyphID - firstInRange); |
| } |
| |
| U_NAMESPACE_END |