1
2/*
3 *
4 * (C) Copyright IBM Corp. 1998-2008 - 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
15U_NAMESPACE_BEGIN
16
17UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine)
18
19GXLayoutEngine::GXLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, const MorphTableHeader *morphTable, LEErrorCode &success)
20    : LayoutEngine(fontInstance, scriptCode, languageCode, 0, success), fMorphTable(morphTable)
21{
22    // nothing else to do?
23}
24
25GXLayoutEngine::~GXLayoutEngine()
26{
27    reset();
28}
29
30// apply 'mort' table
31le_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
54void 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
69U_NAMESPACE_END
70