1/* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26/* 27 * 28 * 29 * (C) Copyright IBM Corp. 1998 - 2005 - All Rights Reserved 30 * 31 */ 32 33#include "LETypes.h" 34#include "OpenTypeTables.h" 35#include "DeviceTables.h" 36#include "LESwaps.h" 37 38U_NAMESPACE_BEGIN 39 40const le_uint16 DeviceTable::fieldMasks[] = {0x0003, 0x000F, 0x00FF}; 41const le_uint16 DeviceTable::fieldSignBits[] = {0x0002, 0x0008, 0x0080}; 42const le_uint16 DeviceTable::fieldBits[] = { 2, 4, 8}; 43 44#define FORMAT_COUNT LE_ARRAY_SIZE(fieldBits) 45 46le_int16 DeviceTable::getAdjustment(const LEReferenceTo<DeviceTable>&base, le_uint16 ppem, LEErrorCode &success) const 47{ 48 le_int16 result = 0; 49 if (LE_FAILURE(success)) { 50 return result; 51 } 52 le_uint16 start = SWAPW(startSize); 53 le_uint16 format = SWAPW(deltaFormat) - 1; 54 55 if (ppem >= start && ppem <= SWAPW(endSize) && format < FORMAT_COUNT) { 56 le_uint16 sizeIndex = ppem - start; 57 le_uint16 bits = fieldBits[format]; 58 le_uint16 count = 16 / bits; 59 60 LEReferenceToArrayOf<le_uint16> deltaValuesRef(base, success, deltaValues, (sizeIndex / count)); 61 62 if(LE_FAILURE(success)) { 63 return result; 64 } 65 66 le_uint16 word = SWAPW(deltaValues[sizeIndex / count]); 67 le_uint16 fieldIndex = sizeIndex % count; 68 le_uint16 shift = 16 - (bits * (fieldIndex + 1)); 69 le_uint16 field = (word >> shift) & fieldMasks[format]; 70 71 result = field; 72 73 if ((field & fieldSignBits[format]) != 0) { 74 result |= ~ fieldMasks[format]; 75 } 76 } 77 78 return result; 79} 80 81U_NAMESPACE_END 82