1/*
2 *******************************************************************************
3 *
4 *   Copyright (C) 1999-2015, International Business Machines
5 *   Corporation and others.  All Rights Reserved.
6 *
7 *******************************************************************************
8 *   file name:  SimpleFontInstance.cpp
9 *
10 *   created on: 03/30/2006
11 *   created by: Eric R. Mader
12 */
13
14#include "unicode/utypes.h"
15#include "unicode/uchar.h"
16
17#include "layout/LETypes.h"
18#include "layout/LEFontInstance.h"
19
20#ifndef USING_ICULEHB
21#include "CanonShaping.h"
22#endif
23
24#include "SimpleFontInstance.h"
25
26SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status)
27    : fPointSize(pointSize), fAscent(0), fDescent(0)
28{
29    if (LE_FAILURE(status)) {
30        return;
31    }
32
33    fAscent  = (le_int32) yUnitsToPoints(2000.0);
34    fDescent = (le_int32) yUnitsToPoints(600.0);
35
36    return;
37}
38
39SimpleFontInstance::~SimpleFontInstance()
40{
41    // nothing to do...
42}
43
44const void *SimpleFontInstance::getFontTable(LETag tableTag, size_t &length) const
45{
46  length = -1; // unknown for this test.
47#ifndef USING_ICULEHB
48    if (tableTag == LE_GSUB_TABLE_TAG) {
49        return CanonShaping::glyphSubstitutionTable;
50    }
51
52    if (tableTag == LE_GDEF_TABLE_TAG) {
53        return CanonShaping::glyphDefinitionTable;
54    }
55#endif
56    return NULL;
57}
58
59void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
60{
61#if 0
62    if (u_getCombiningClass((UChar32) glyph) == 0) {
63        advance.fX = xUnitsToPoints(2048);
64    } else {
65        advance.fX = 0;
66    }
67#else
68    (void)glyph;  // Suppress unused parameter compiler warning.
69    advance.fX = xUnitsToPoints(2048);
70#endif
71
72    advance.fY = 0;
73}
74
75le_int32 SimpleFontInstance::getUnitsPerEM() const
76{
77    return 2048;
78}
79
80le_int32 SimpleFontInstance::getAscent() const
81{
82    return fAscent;
83}
84
85le_int32 SimpleFontInstance::getDescent() const
86{
87    return fDescent;
88}
89
90le_int32 SimpleFontInstance::getLeading() const
91{
92    return 0;
93}
94
95// We really want to inherit this method from the superclass, but some compilers
96// issue a warning if we don't implement it...
97LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const
98{
99    return LEFontInstance::mapCharToGlyph(ch, mapper, filterZeroWidth);
100}
101
102// We really want to inherit this method from the superclass, but some compilers
103// issue a warning if we don't implement it...
104LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const
105{
106    return LEFontInstance::mapCharToGlyph(ch, mapper);
107}
108
109LEGlyphID SimpleFontInstance::mapCharToGlyph(LEUnicode32 ch) const
110{
111    return (LEGlyphID) ch;
112}
113
114float SimpleFontInstance::getXPixelsPerEm() const
115{
116    return fPointSize;
117}
118
119float SimpleFontInstance::getYPixelsPerEm() const
120{
121    return fPointSize;
122}
123
124float SimpleFontInstance::getScaleFactorX() const
125{
126    return 1.0;
127}
128
129float SimpleFontInstance::getScaleFactorY() const
130{
131    return 1.0;
132}
133
134le_bool SimpleFontInstance::getGlyphPoint(LEGlyphID /*glyph*/, le_int32 /*pointNumber*/, LEPoint &/*point*/) const
135{
136    return FALSE;
137}
138
139