SegmentArrayProcessor.cpp revision ac04d0bbe12b3ef54518635711412f178cb4d16 
1/*
2 *
3 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
4 *
5 */
6
7#include "LETypes.h"
8#include "MorphTables.h"
9#include "SubtableProcessor.h"
10#include "NonContextualGlyphSubst.h"
11#include "NonContextualGlyphSubstProc.h"
12#include "SegmentArrayProcessor.h"
13#include "LEGlyphStorage.h"
14#include "LESwaps.h"
15
16U_NAMESPACE_BEGIN
17
18UOBJECT_DEFINE_RTTI_IMPLEMENTATION(SegmentArrayProcessor)
19
20SegmentArrayProcessor::SegmentArrayProcessor()
21{
22}
23
24SegmentArrayProcessor::SegmentArrayProcessor(const MorphSubtableHeader *morphSubtableHeader)
25  : NonContextualGlyphSubstitutionProcessor(morphSubtableHeader)
26{
27    const NonContextualGlyphSubstitutionHeader *header = (const NonContextualGlyphSubstitutionHeader *) morphSubtableHeader;
28
29    segmentArrayLookupTable = (const SegmentArrayLookupTable *) &header->table;
30}
31
32SegmentArrayProcessor::~SegmentArrayProcessor()
33{
34}
35
36void SegmentArrayProcessor::process(LEGlyphStorage &glyphStorage)
37{
38    const LookupSegment *segments = segmentArrayLookupTable->segments;
39    le_int32 glyphCount = glyphStorage.getGlyphCount();
40    le_int32 glyph;
41
42    for (glyph = 0; glyph < glyphCount; glyph += 1) {
43        LEGlyphID thisGlyph = glyphStorage[glyph];
44        const LookupSegment *lookupSegment = segmentArrayLookupTable->lookupSegment(segments, thisGlyph);
45
46        if (lookupSegment != NULL)  {
47            TTGlyphID firstGlyph = SWAPW(lookupSegment->firstGlyph);
48            le_int16  offset = SWAPW(lookupSegment->value);
49
50            if (offset != 0) {
51                TTGlyphID  *glyphArray = (TTGlyphID *) ((char *) subtableHeader + offset);
52                TTGlyphID   newGlyph   = SWAPW(glyphArray[LE_GET_GLYPH(thisGlyph) - firstGlyph]);
53
54                glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
55            }
56        }
57    }
58}
59
60U_NAMESPACE_END
61