1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/fontservices/textshaperplugin/IcuSource/layout/DeviceTables.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,44 @@
     1.4 +/*
     1.5 + * @(#)DeviceTables.cpp 1.5 00/03/15
     1.6 + *
     1.7 + * (C) Copyright IBM Corp. 1998 - 2005 - All Rights Reserved
     1.8 + *
     1.9 + */
    1.10 +
    1.11 +#include "LETypes.h"
    1.12 +#include "OpenTypeTables.h"
    1.13 +#include "DeviceTables.h"
    1.14 +#include "LESwaps.h"
    1.15 +
    1.16 +U_NAMESPACE_BEGIN
    1.17 +
    1.18 +const le_uint16 DeviceTable::fieldMasks[]    = {0x0003, 0x000F, 0x00FF};
    1.19 +const le_uint16 DeviceTable::fieldSignBits[] = {0x0002, 0x0008, 0x0080};
    1.20 +const le_uint16 DeviceTable::fieldBits[]     = {     2,      4,      8};
    1.21 +
    1.22 +le_int16 DeviceTable::getAdjustment(le_uint16 ppem) const
    1.23 +{
    1.24 +    le_uint16 start = SWAPW(startSize);
    1.25 +    le_uint16 format = SWAPW(deltaFormat) - 1;
    1.26 +    le_int16 result = 0;
    1.27 +    
    1.28 +    if (ppem >= start && ppem <= SWAPW(endSize)) {
    1.29 +        le_uint16 sizeIndex = ppem - start;
    1.30 +        le_uint16 bits = fieldBits[format];
    1.31 +        le_uint16 count = 16 / bits;
    1.32 +        le_uint16 word = SWAPW(deltaValues[sizeIndex / count]);
    1.33 +        le_uint16 fieldIndex = sizeIndex % count;
    1.34 +        le_uint16 shift = 16 - (bits * (fieldIndex + 1));
    1.35 +        le_uint16 field = (word >> shift) & fieldMasks[format];
    1.36 +
    1.37 +        result = field;
    1.38 +
    1.39 +        if ((field & fieldSignBits[format]) != 0) {
    1.40 +            result |= ~ fieldMasks[format];
    1.41 +        }
    1.42 +    }
    1.43 +
    1.44 +    return result;
    1.45 +}
    1.46 +
    1.47 +U_NAMESPACE_END