| /* |
| * 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 - 2005 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "OpenTypeTables.h" |
| #include "DeviceTables.h" |
| #include "LESwaps.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| const le_uint16 DeviceTable::fieldMasks[] = {0x0003, 0x000F, 0x00FF}; |
| const le_uint16 DeviceTable::fieldSignBits[] = {0x0002, 0x0008, 0x0080}; |
| const le_uint16 DeviceTable::fieldBits[] = { 2, 4, 8}; |
| |
| #define FORMAT_COUNT LE_ARRAY_SIZE(fieldBits) |
| |
| le_int16 DeviceTable::getAdjustment(const LEReferenceTo<DeviceTable>&base, le_uint16 ppem, LEErrorCode &success) const |
| { |
| le_int16 result = 0; |
| if (LE_FAILURE(success)) { |
| return result; |
| } |
| le_uint16 start = SWAPW(startSize); |
| le_uint16 format = SWAPW(deltaFormat) - 1; |
| |
| if (ppem >= start && ppem <= SWAPW(endSize) && format < FORMAT_COUNT) { |
| le_uint16 sizeIndex = ppem - start; |
| le_uint16 bits = fieldBits[format]; |
| le_uint16 count = 16 / bits; |
| |
| LEReferenceToArrayOf<le_uint16> deltaValuesRef(base, success, deltaValues, (sizeIndex / count)); |
| |
| if(LE_FAILURE(success)) { |
| return result; |
| } |
| |
| le_uint16 word = SWAPW(deltaValues[sizeIndex / count]); |
| le_uint16 fieldIndex = sizeIndex % count; |
| le_uint16 shift = 16 - (bits * (fieldIndex + 1)); |
| le_uint16 field = (word >> shift) & fieldMasks[format]; |
| |
| result = field; |
| |
| if ((field & fieldSignBits[format]) != 0) { |
| result |= ~ fieldMasks[format]; |
| } |
| } |
| |
| return result; |
| } |
| |
| U_NAMESPACE_END |