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
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 MorphTableHeader *morphTable, LEErrorCode &success)
20 : LayoutEngine(fontInstance, scriptCode, languageCode, 0, success), fMorphTable(morphTable)
21 {
22 // nothing else to do?
23 }
24
~GXLayoutEngine()25 GXLayoutEngine::~GXLayoutEngine()
26 {
27 reset();
28 }
29
30 // apply 'mort' table
computeGlyphs(const LEUnicode chars[],le_int32 offset,le_int32 count,le_int32 max,le_bool rightToLeft,LEGlyphStorage & glyphStorage,LEErrorCode & success)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
adjustGlyphPositions(const LEUnicode chars[],le_int32 offset,le_int32 count,le_bool,LEGlyphStorage &,LEErrorCode & success)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
70