icuSources/layout/CursiveAttachmentSubtables.cpp

   1 /*
   2  * (C) Copyright IBM Corp. 1998 - 2005 - 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(GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const
  18 {
  19     LEGlyphID glyphID       = glyphIterator->getCurrGlyphID();
  20     le_int32  coverageIndex = getGlyphCoverage(glyphID);
  21     le_uint16 eeCount       = SWAPW(entryExitCount);
  22
  23     if (coverageIndex < 0 || coverageIndex >= eeCount) {
  24         glyphIterator->setCursiveGlyph();
  25         return 0;
  26     }
  27
  28     LEPoint entryAnchor, exitAnchor;
  29     Offset entryOffset = SWAPW(entryExitRecords[coverageIndex].entryAnchor);
  30     Offset exitOffset  = SWAPW(entryExitRecords[coverageIndex].exitAnchor);
  31
  32     if (entryOffset != 0) {
  33         const AnchorTable *entryAnchorTable = (const AnchorTable *) ((char *) this + entryOffset);
  34
  35         entryAnchorTable->getAnchor(glyphID, fontInstance, entryAnchor);
  36         glyphIterator->setCursiveEntryPoint(entryAnchor);
  37     }
  38
  39     if (exitOffset != 0) {
  40         const AnchorTable *exitAnchorTable = (const AnchorTable *) ((char *) this + exitOffset);
  41
  42         exitAnchorTable->getAnchor(glyphID, fontInstance, exitAnchor);
  43         glyphIterator->setCursiveExitPoint(exitAnchor);
  44     }
  45
  46     return 1;
  47 }
  48
  49 U_NAMESPACE_END