source/layout/CursiveAttachmentSubtables.cpp

   1 /*
   2  * (C) Copyright IBM Corp. 1998 - 2015 - All Rights Reserved
   3  *
   4  */
   5
   6 #include "LETypes.h"
   7 #include "OpenTypeTables.h"
   8 #include "GlyphPositioningTables.h"
   9 #include "CursiveAttachmentSubtables.h"
  10 #include "AnchorTables.h"
  11 #include "GlyphIterator.h"
  12 #include "OpenTypeUtilities.h"
  13 #include "LESwaps.h"
  14
  15 U_NAMESPACE_BEGIN
  16
  17 le_uint32 CursiveAttachmentSubtable::process(const LEReferenceTo<CursiveAttachmentSubtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
  18 {
  19     LEGlyphID glyphID       = glyphIterator->getCurrGlyphID();
  20     le_int32  coverageIndex = getGlyphCoverage(base, glyphID, success);
  21     le_uint16 eeCount       = SWAPW(entryExitCount);
  22
  23     LEReferenceToArrayOf<EntryExitRecord>
  24         entryExitRecordsArrayRef(base, success, entryExitRecords, coverageIndex);
  25
  26     if (coverageIndex < 0 || coverageIndex >= eeCount || LE_FAILURE(success)) {
  27         glyphIterator->setCursiveGlyph();
  28         return 0;
  29     }
  30
  31     LEPoint entryAnchor, exitAnchor;
  32     Offset entryOffset = SWAPW(entryExitRecords[coverageIndex].entryAnchor);
  33     Offset exitOffset  = SWAPW(entryExitRecords[coverageIndex].exitAnchor);
  34
  35     if (entryOffset != 0) {
  36         const AnchorTable *entryAnchorTable = (const AnchorTable *) ((char *) this + entryOffset);
  37
  38         entryAnchorTable->getAnchor(glyphID, fontInstance, entryAnchor);
  39         glyphIterator->setCursiveEntryPoint(entryAnchor);
  40     } else {
  41         //glyphIterator->clearCursiveEntryPoint();
  42     }
  43
  44     if (exitOffset != 0) {
  45         const AnchorTable *exitAnchorTable = (const AnchorTable *) ((char *) this + exitOffset);
  46
  47         exitAnchorTable->getAnchor(glyphID, fontInstance, exitAnchor);
  48         glyphIterator->setCursiveExitPoint(exitAnchor);
  49     } else {
  50         //glyphIterator->clearCursiveExitPoint();
  51     }
  52
  53     return 1;
  54 }
  55
  56 U_NAMESPACE_END