1/*
2 *******************************************************************************
3 *
4 *   © 2016 and later: Unicode, Inc. and others.
5 *   License & terms of use: http://www.unicode.org/copyright.html
6 *
7 *******************************************************************************
8 *******************************************************************************
9 *
10 *   Copyright (C) 1999-2013, International Business Machines
11 *   Corporation and others.  All Rights Reserved.
12 *
13 *******************************************************************************
14 *   file name:  SimpleFontInstance.cpp
15 *
16 *   created on: 03/30/2006
17 *   created by: Eric R. Mader
18 */
19
20#include "unicode/utypes.h"
21#include "unicode/uchar.h"
22
23#include "layout/LETypes.h"
24#include "layout/LEFontInstance.h"
25
26#include "layout/CanonShaping.h"
27#include "SimpleFontInstance.h"
28
29SimpleFontInstance::SimpleFontInstance(float pointSize, LEErrorCode &status)
30    : fPointSize(pointSize), fAscent(0), fDescent(0)
31{
32    if (LE_FAILURE(status)) {
33        return;
34    }
35
36    fAscent  = (le_int32) yUnitsToPoints(2000.0);
37    fDescent = (le_int32) yUnitsToPoints(600.0);
38
39    return;
40}
41
42SimpleFontInstance::~SimpleFontInstance()
43{
44    // nothing to do...
45}
46
47const void *SimpleFontInstance::getFontTable(LETag tableTag) const
48{
49    if (tableTag == LE_GSUB_TABLE_TAG) {
50        return CanonShaping::glyphSubstitutionTable;
51    }
52
53    if (tableTag == LE_GDEF_TABLE_TAG) {
54        return CanonShaping::glyphDefinitionTable;
55    }
56
57    return NULL;
58}
59
60void SimpleFontInstance::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const
61{
62#if 0
63    if (u_getCombiningClass((UChar32) glyph) == 0) {
64        advance.fX = xUnitsToPoints(2048);
65    } else {
66        advance.fX = 0;
67    }
68#else
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