1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.  Oracle designates this

     7  * particular file as subject to the "Classpath" exception as provided

     8  * by Oracle in the LICENSE file that accompanied this code.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 /*

    27  *

    28  * (C) Copyright IBM Corp.  and others 1998-2013 - All Rights Reserved

    29  *

    30  */

    31 

    32 #include "LETypes.h"

    33 #include "LayoutEngine.h"

    34 #include "GXLayoutEngine2.h"

    35 #include "LEGlyphStorage.h"

    36 #include "MorphTables.h"

    37 

    38 U_NAMESPACE_BEGIN

    39 

    40 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine2)

    41 

    42 GXLayoutEngine2::GXLayoutEngine2(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const MorphTableHeader2 *morphTable, le_int32 typoFlags, LEErrorCode &success)

    43     : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags, success), fMorphTable(morphTable)

    44 {

    45     // nothing else to do?

    46 }

    47 

    48 GXLayoutEngine2::~GXLayoutEngine2()

    49 {

    50     reset();

    51 }

    52 

    53 // apply 'morx' table

    54 le_int32 GXLayoutEngine2::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool rightToLeft, LEGlyphStorage &glyphStorage, LEErrorCode &success)

    55 {

    56     if (LE_FAILURE(success)) {

    57         return 0;

    58     }

    59 

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

    61         success = LE_ILLEGAL_ARGUMENT_ERROR;

    62         return 0;

    63     }

    64 

    65     mapCharsToGlyphs(chars, offset, count, rightToLeft, rightToLeft, glyphStorage, success);

    66 

    67     if (LE_FAILURE(success)) {

    68         return 0;

    69     }

    70 

    71     fMorphTable->process(glyphStorage, fTypoFlags);

    72     return count;

    73 }

    74 

    75 // apply positional tables

    76 void GXLayoutEngine2::adjustGlyphPositions(const LEUnicode chars[], le_int32 offset, le_int32 count, le_bool /*reverse*/,

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

    78 {

    79     if (LE_FAILURE(success)) {

    80         return;

    81     }

    82 

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

    84         success = LE_ILLEGAL_ARGUMENT_ERROR;

    85         return;

    86     }

    87 

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

    89 }

    90 

    91 U_NAMESPACE_END