Symaptic: os/textandloc/fontservices/textshaperplugin/IcuSource/layout/ValueRecords.cpp@bde4ae8d615e

     1 /*

     2  *

     3  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved

     4  *

     5  */

     7 #include "LETypes.h"

     8 #include "LEFontInstance.h"

     9 #include "OpenTypeTables.h"

    10 #include "ValueRecords.h"

    11 #include "DeviceTables.h"

    12 #include "GlyphIterator.h"

    13 #include "LESwaps.h"

    15 U_NAMESPACE_BEGIN

    17 #define Nibble(value, nibble) ((value >> (nibble * 4)) & 0xF)

    18 #define NibbleBits(value, nibble) (bitsInNibble[Nibble(value, nibble)])

    20 le_int16 ValueRecord::getFieldValue(ValueFormat valueFormat, ValueRecordField field) const

    21 {

    22     le_int16 valueIndex = getFieldIndex(valueFormat, field);

    23     le_int16 value = values[valueIndex];

    25     return SWAPW(value);

    26 }

    28 le_int16 ValueRecord::getFieldValue(le_int16 index, ValueFormat valueFormat, ValueRecordField field) const

    29 {

    30     le_int16 baseIndex = getFieldCount(valueFormat) * index;

    31     le_int16 valueIndex = getFieldIndex(valueFormat, field);

    32     le_int16 value = values[baseIndex + valueIndex];

    34     return SWAPW(value);

    35 }

    37 void ValueRecord::adjustPosition(ValueFormat valueFormat, const char *base, GlyphIterator &glyphIterator,

    38                                  const LEFontInstance *fontInstance) const

    39 {

    40     float xPlacementAdjustment = 0;

    41     float yPlacementAdjustment = 0;

    42     float xAdvanceAdjustment   = 0;

    43     float yAdvanceAdjustment   = 0;

    45     if ((valueFormat & vfbXPlacement) != 0) {

    46         le_int16 value = getFieldValue(valueFormat, vrfXPlacement);

    47         LEPoint pixels;

    49         fontInstance->transformFunits(value, 0, pixels);

    51         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

    52         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

    53     }

    55     if ((valueFormat & vfbYPlacement) != 0) {

    56         le_int16 value = getFieldValue(valueFormat, vrfYPlacement);

    57         LEPoint pixels;

    59         fontInstance->transformFunits(0, value, pixels);

    61         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

    62         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

    63     }

    65     if ((valueFormat & vfbXAdvance) != 0) {

    66         le_int16 value = getFieldValue(valueFormat, vrfXAdvance);

    67         LEPoint pixels;

    69         fontInstance->transformFunits(value, 0, pixels);

    71         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

    72         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

    73     }

    75     if ((valueFormat & vfbYAdvance) != 0) {

    76         le_int16 value = getFieldValue(valueFormat, vrfYAdvance);

    77         LEPoint pixels;

    79         fontInstance->transformFunits(0, value, pixels);

    81         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

    82         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

    83     }

    85     // FIXME: The device adjustments should really be transformed, but

    86     // the only way I know how to do that is to convert them to le_int16 units,

    87     // transform them, and then convert them back to pixels. Sigh...

    88     if ((valueFormat & vfbAnyDevice) != 0) {

    89         le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm();

    90         le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm();

    92         if ((valueFormat & vfbXPlaDevice) != 0) {

    93             Offset dtOffset = getFieldValue(valueFormat, vrfXPlaDevice);

    95             if (dtOffset != 0) {

    96                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

    97                 le_int16 xAdj = dt->getAdjustment(xppem);

    99                 xPlacementAdjustment += fontInstance->xPixelsToUnits(xAdj);

   100             }

   101         }

   103         if ((valueFormat & vfbYPlaDevice) != 0) {

   104             Offset dtOffset = getFieldValue(valueFormat, vrfYPlaDevice);

   106             if (dtOffset != 0) {

   107                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   108                 le_int16 yAdj = dt->getAdjustment(yppem);

   110                 yPlacementAdjustment += fontInstance->yPixelsToUnits(yAdj);

   111             }

   112         }

   114         if ((valueFormat & vfbXAdvDevice) != 0) {

   115             Offset dtOffset = getFieldValue(valueFormat, vrfXAdvDevice);

   117             if (dtOffset != 0) {

   118                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   119                 le_int16 xAdj = dt->getAdjustment(xppem);

   121                 xAdvanceAdjustment += fontInstance->xPixelsToUnits(xAdj);

   122             }

   123         }

   125         if ((valueFormat & vfbYAdvDevice) != 0) {

   126             Offset dtOffset = getFieldValue(valueFormat, vrfYAdvDevice);

   128             if (dtOffset != 0) {

   129                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   130                 le_int16 yAdj = dt->getAdjustment(yppem);

   132                 yAdvanceAdjustment += fontInstance->yPixelsToUnits(yAdj);

   133             }

   134         }

   135     }

   137     glyphIterator.adjustCurrGlyphPositionAdjustment(

   138         xPlacementAdjustment, yPlacementAdjustment, xAdvanceAdjustment, yAdvanceAdjustment);

   139 }

   141 void ValueRecord::adjustPosition(le_int16 index, ValueFormat valueFormat, const char *base, GlyphIterator &glyphIterator,

   142                                  const LEFontInstance *fontInstance) const

   143 {

   144     float xPlacementAdjustment = 0;

   145     float yPlacementAdjustment = 0;

   146     float xAdvanceAdjustment   = 0;

   147     float yAdvanceAdjustment   = 0;

   149     if ((valueFormat & vfbXPlacement) != 0) {

   150         le_int16 value = getFieldValue(index, valueFormat, vrfXPlacement);

   151         LEPoint pixels;

   153         fontInstance->transformFunits(value, 0, pixels);

   155         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

   156         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

   157     }

   159     if ((valueFormat & vfbYPlacement) != 0) {

   160         le_int16 value = getFieldValue(index, valueFormat, vrfYPlacement);

   161         LEPoint pixels;

   163         fontInstance->transformFunits(0, value, pixels);

   165         xPlacementAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

   166         yPlacementAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

   167     }

   169     if ((valueFormat & vfbXAdvance) != 0) {

   170         le_int16 value = getFieldValue(index, valueFormat, vrfXAdvance);

   171         LEPoint pixels;

   173         fontInstance->transformFunits(value, 0, pixels);

   175         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

   176         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

   177     }

   179     if ((valueFormat & vfbYAdvance) != 0) {

   180         le_int16 value = getFieldValue(index, valueFormat, vrfYAdvance);

   181         LEPoint pixels;

   183         fontInstance->transformFunits(0, value, pixels);

   185         xAdvanceAdjustment += fontInstance->xPixelsToUnits(pixels.fX);

   186         yAdvanceAdjustment += fontInstance->yPixelsToUnits(pixels.fY);

   187     }

   189     // FIXME: The device adjustments should really be transformed, but

   190     // the only way I know how to do that is to convert them to le_int16 units,

   191     // transform them, and then convert them back to pixels. Sigh...

   192     if ((valueFormat & vfbAnyDevice) != 0) {

   193         le_int16 xppem = (le_int16) fontInstance->getXPixelsPerEm();

   194         le_int16 yppem = (le_int16) fontInstance->getYPixelsPerEm();

   196         if ((valueFormat & vfbXPlaDevice) != 0) {

   197             Offset dtOffset = getFieldValue(index, valueFormat, vrfXPlaDevice);

   199             if (dtOffset != 0) {

   200                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   201                 le_int16 xAdj = dt->getAdjustment(xppem);

   203                 xPlacementAdjustment += fontInstance->xPixelsToUnits(xAdj);

   204             }

   205         }

   207         if ((valueFormat & vfbYPlaDevice) != 0) {

   208             Offset dtOffset = getFieldValue(index, valueFormat, vrfYPlaDevice);

   210             if (dtOffset != 0) {

   211                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   212                 le_int16 yAdj = dt->getAdjustment(yppem);

   214                 yPlacementAdjustment += fontInstance->yPixelsToUnits(yAdj);

   215             }

   216         }

   218         if ((valueFormat & vfbXAdvDevice) != 0) {

   219             Offset dtOffset = getFieldValue(index, valueFormat, vrfXAdvDevice);

   221             if (dtOffset != 0) {

   222                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   223                 le_int16 xAdj = dt->getAdjustment(xppem);

   225                 xAdvanceAdjustment += fontInstance->xPixelsToUnits(xAdj);

   226             }

   227         }

   229         if ((valueFormat & vfbYAdvDevice) != 0) {

   230             Offset dtOffset = getFieldValue(index, valueFormat, vrfYAdvDevice);

   232             if (dtOffset != 0) {

   233                 const DeviceTable *dt = (const DeviceTable *) (base + dtOffset);

   234                 le_int16 yAdj = dt->getAdjustment(yppem);

   236                 yAdvanceAdjustment += fontInstance->yPixelsToUnits(yAdj);

   237             }

   238         }

   239     }

   241     glyphIterator.adjustCurrGlyphPositionAdjustment(

   242         xPlacementAdjustment, yPlacementAdjustment, xAdvanceAdjustment, yAdvanceAdjustment);

   243 }

   245 le_int16 ValueRecord::getSize(ValueFormat valueFormat)

   246 {

   247     return getFieldCount(valueFormat) * sizeof(le_int16);

   248 }

   250 le_int16 ValueRecord::getFieldCount(ValueFormat valueFormat)

   251 {

   252     static const le_int16 bitsInNibble[] =

   253     {

   254         0 + 0 + 0 + 0,

   255         0 + 0 + 0 + 1,

   256         0 + 0 + 1 + 0,

   257         0 + 0 + 1 + 1,

   258         0 + 1 + 0 + 0,

   259         0 + 1 + 0 + 1,

   260         0 + 1 + 1 + 0,

   261         0 + 1 + 1 + 1,

   262         1 + 0 + 0 + 0,

   263         1 + 0 + 0 + 1,

   264         1 + 0 + 1 + 0,

   265         1 + 0 + 1 + 1,

   266         1 + 1 + 0 + 0,

   267         1 + 1 + 0 + 1,

   268         1 + 1 + 1 + 0,

   269         1 + 1 + 1 + 1

   270     };

   272     valueFormat &= ~vfbReserved;

   274     return NibbleBits(valueFormat, 0) + NibbleBits(valueFormat, 1) +

   275            NibbleBits(valueFormat, 2) + NibbleBits(valueFormat, 3);

   276 }

   278 le_int16 ValueRecord::getFieldIndex(ValueFormat valueFormat, ValueRecordField field)

   279 {

   280     static const le_uint16 beforeMasks[] =

   281     {

   282         0x0000,

   283         0x0001,

   284         0x0003,

   285         0x0007,

   286         0x000F,

   287         0x001F,

   288         0x003F,

   289         0x007F,

   290         0x00FF,

   291         0x01FF,

   292         0x03FF,

   293         0x07FF,

   294         0x0FFF,

   295         0x1FFF,

   296         0x3FFF,

   297         0x7FFF,

   298         0xFFFF

   299     };

   301     return getFieldCount(valueFormat & beforeMasks[field]);

   302 }

   304 U_NAMESPACE_END

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--