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
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(GXLayoutEngine)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
~GXLayoutEngine()26 GXLayoutEngine::~GXLayoutEngine()
27 {
28 reset();
29 }
30
31 // apply 'mort' table
computeGlyphs(const LEUnicode chars[],le_int32 offset,le_int32 count,le_int32 max,le_bool rightToLeft,LEGlyphStorage & glyphStorage,LEErrorCode & success)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
adjustGlyphPositions(const LEUnicode chars[],le_int32 offset,le_int32 count,le_bool,LEGlyphStorage &,LEErrorCode & success)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
71