1 

     2 /*

     3  *

     4  * (C) Copyright IBM Corp. 1998-2005 - 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 MorphTableHeader *morphTable) 

    20     : LayoutEngine(fontInstance, scriptCode, languageCode, 0), fMorphTable(morphTable)

    21 {

    22     // nothing else to do?

    23 }

    24 

    25 GXLayoutEngine::~GXLayoutEngine()

    26 {

    27     reset();

    28 }

    29 

    30 // apply 'mort' table

    31 le_int32 GXLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)

    32 {

    33     if (LE_FAILURE(success)) {

    34         return 0;

    35     }

    36 

    37     if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) {

    38         success = LE_ILLEGAL_ARGUMENT_ERROR;

    39         return 0;

    40     }

    41 

    42     mapCharsToGlyphs(chars, offset, count, FALSE, rightToLeft, glyphStorage, success);

    43 

    44     if (LE_FAILURE(success)) {

    45         return 0;

    46     }

    47 

    48     fMorphTable->process(glyphStorage);

    49 

    50     return count;

    51 }

    52 

    53 // apply positional tables

    54 void GXLayoutEngine::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,

    55                                           LEGlyphStorage &/*glyphStorage*/, LEErrorCode &success)

    56 {

    57     if (LE_FAILURE(success)) {

    58         return;

    59     }

    60 

    61     if (chars == NULL || offset < 0 || count < 0) {

    62         success = LE_ILLEGAL_ARGUMENT_ERROR;

    63         return;

    64     }

    65 

    66     // FIXME: no positional processing yet...

    67 }

    68 

    69 U_NAMESPACE_END