icuSources/layout/GXLayoutEngine.cpp

   1
   2 /*
   3  *
   4  * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
   5  *
   6  */
   7
   8 #include "LETypes.h"
   9 #include "LayoutEngine.h"
  10 #include "GXLayoutEngine.h"
  11 #include "LEGlyphStorage.h"
  12
  13 #include "MorphTables.h"
  14
  15 U_NAMESPACE_BEGIN
  16
  17 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine)
  18
  19   GXLayoutEngine::GXLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const LEReferenceTo<MorphTableHeader> &morphTable, LEErrorCode &success)
  20     : LayoutEngine(fontInstance, scriptCode, languageCode, 0, success), fMorphTable(morphTable)
  21 {
  22   fMorphTable.orphan();
  23     // nothing else to do?
  24 }
  25
  26 GXLayoutEngine::~GXLayoutEngine()
  27 {
  28     reset();
  29 }
  30
  31 // apply 'mort' table
  32 le_int32 GXLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)
  33 {
  34     if (LE_FAILURE(success)) {
  35         return 0;
  36     }
  37
  38     if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {
  39         success = LE_ILLEGAL_ARGUMENT_ERROR;
  40         return 0;
  41     }
  42
  43     mapCharsToGlyphs(chars, offset, count, FALSE, rightToLeft, glyphStorage, success);
  44
  45     if (LE_FAILURE(success)) {
  46         return 0;
  47     }
  48
  49     fMorphTable->process(fMorphTable, glyphStorage, success);
  50
  51     return count;
  52 }
  53
  54 // apply positional tables
  55 void GXLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,
  56                                           LEGlyphStorage &/*glyphStorage*/, LEErrorCode &success)
  57 {
  58     if (LE_FAILURE(success)) {
  59         return;
  60     }
  61
  62     if (chars == NULL || offset < 0 || count < 0) {
  63         success = LE_ILLEGAL_ARGUMENT_ERROR;
  64         return;
  65     }
  66
  67     // FIXME: no positional processing yet...
  68 }
  69
  70 U_NAMESPACE_END