icuSources/layout/GXLayoutEngine2.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp.  and others 1998-2013 - All Rights Reserved
   4  *
   5  */
   6
   7 #include "LETypes.h"
   8 #include "LayoutEngine.h"
   9 #include "GXLayoutEngine2.h"
  10 #include "LEGlyphStorage.h"
  11 #include "MorphTables.h"
  12
  13 U_NAMESPACE_BEGIN
  14
  15 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine2)
  16
  17 GXLayoutEngine2::GXLayoutEngine2(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const MorphTableHeader2 *morphTable, le_int32 typoFlags, LEErrorCode &success)
  18     : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fMorphTable(morphTable)
  19 {
  20     // nothing else to do?
  21 }
  22
  23 GXLayoutEngine2::~GXLayoutEngine2()
  24 {
  25     reset();
  26 }
  27
  28 // apply 'morx' table
  29 le_int32 GXLayoutEngine2::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)
  30 {
  31     if (LE_FAILURE(success)) {
  32         return 0;
  33     }
  34
  35     if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
  36         success = LE_ILLEGAL_ARGUMENT_ERROR;
  37         return 0;
  38     }
  39
  40     mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success);
  41
  42     if (LE_FAILURE(success)) {
  43         return 0;
  44     }
  45
  46     fMorphTable->process(glyphStorage, fTypoFlags);
  47     return count;
  48 }
  49
  50 // apply positional tables
  51 void GXLayoutEngine2::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,
  52                                           LEGlyphStorage &/*glyphStorage*/, LEErrorCode &success)
  53 {
  54     if (LE_FAILURE(success)) {
  55         return;
  56     }
  57
  58     if (chars == NULL || offset < 0 || count < 0) {
  59         success = LE_ILLEGAL_ARGUMENT_ERROR;
  60         return;
  61     }
  62
  63     // FIXME: no positional processing yet...
  64 }
  65
  66 U_NAMESPACE_END